/* ================================================
   Mathematik Klasse 9 - Vollständiges CSS
   ================================================

   Basiert auf mathe8.css - Identisches Farbschema

   Einheitliches Blau-Farbschema:
   - Stufe 1 (Einfach/Hell):  #85c1e9 -> #5dade2
   - Stufe 2 (Mittel):        #3498db -> #2980b9
   - Stufe 3 (Schwer/Dunkel): #1e3c72 -> #154360

   Akzentfarben (alle Blautöne):
   - Highlight: #ebf5fb (sehr hell)
   - Info: #d4e6f1 (hell)
   - Primary: #3498db (mittel)
   - Accent: #2a5298 (dunkel)
   ================================================ */

/* ================================================
   CSS Variablen
   ================================================ */
:root {
    /* Blaustufe 1 - Hell (Einfach) */
    --blue-light-1: #85c1e9;
    --blue-light-2: #5dade2;
    --blue-light-bg: #ebf5fb;

    /* Blaustufe 2 - Mittel */
    --blue-medium-1: #3498db;
    --blue-medium-2: #2980b9;
    --blue-medium-bg: #d4e6f1;

    /* Blaustufe 3 - Dunkel (Schwer) */
    --blue-dark-1: #1e3c72;
    --blue-dark-2: #154360;
    --blue-dark-bg: #1a5276;

    /* Standard-Farben */
    --mathe-primary: #3498db;
    --mathe-secondary: #2980b9;
    --mathe-accent: #1e3c72;

    /* Feedback-Farben (dezent) */
    --feedback-success: #5dade2;
    --feedback-warning: #3498db;
    --feedback-error: #2471a3;
}

/* ================================================
   MathJax Schriftart-Override
   ================================================ */
/* MathJax soll seine eigenen mathematischen Schriftarten verwenden,
   nicht die globale Poppins-Schriftart */
mjx-container,
mjx-container *,
.mjx-chtml,
.mjx-chtml *,
.MJXc-display,
.MJXc-display *,
.mjx-math,
.mjx-math *,
.mjx-mrow,
.mjx-container,
mjx-math,
mjx-math * {
    font-family: 'MJXZERO', 'MJXTEX', 'Latin Modern Math', 'Cambria Math', 'Times New Roman', serif !important;
}

/* ================================================
   Card-Header Stile - Drei Blaustufen
   ================================================ */
.card-header-light {
    background: linear-gradient(135deg, var(--blue-light-1) 0%, var(--blue-light-2) 100%) !important;
}

.card-header-medium {
    background: linear-gradient(135deg, var(--blue-medium-1) 0%, var(--blue-medium-2) 100%) !important;
}

.card-header-dark {
    background: linear-gradient(135deg, var(--blue-dark-1) 0%, var(--blue-dark-2) 100%) !important;
}

/* ================================================
   Button Stile - Einheitlich Blau
   ================================================ */
.btn-mathe {
    background: linear-gradient(135deg, var(--blue-medium-1) 0%, var(--blue-medium-2) 100%) !important;
    color: white !important;
    border: none !important;
    transition: all 0.3s ease;
}

.btn-mathe:hover {
    background: linear-gradient(135deg, var(--blue-medium-2) 0%, var(--blue-dark-1) 100%) !important;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.4);
}

.btn-mathe-light {
    background: linear-gradient(135deg, var(--blue-light-1) 0%, var(--blue-light-2) 100%) !important;
    color: white !important;
    border: none !important;
    transition: all 0.3s ease;
}

.btn-mathe-light:hover {
    background: linear-gradient(135deg, var(--blue-light-2) 0%, var(--blue-medium-1) 100%) !important;
    transform: translateY(-2px);
}

.btn-mathe-dark {
    background: linear-gradient(135deg, var(--blue-dark-1) 0%, var(--blue-dark-2) 100%) !important;
    color: white !important;
    border: none !important;
    transition: all 0.3s ease;
}

.btn-mathe-dark:hover {
    background: linear-gradient(135deg, var(--blue-dark-2) 0%, #0d2137 100%) !important;
    transform: translateY(-2px);
}

/* Standard-Button-Klassen in Blau */
.btn {
    display: inline-block;
    padding: 10px 18px;
    margin: 5px 3px;
    background: linear-gradient(135deg, var(--blue-medium-1) 0%, var(--blue-medium-2) 100%);
    color: white;
    border: none;
    border-radius: 4px;
    font-weight: 500;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

.btn:hover {
    background: linear-gradient(135deg, var(--blue-medium-2) 0%, var(--blue-dark-1) 100%);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    transform: translateY(-2px);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--blue-light-1) 0%, var(--blue-light-2) 100%);
}

.btn-secondary:hover {
    background: linear-gradient(135deg, var(--blue-light-2) 0%, var(--blue-medium-1) 100%);
}

/* ================================================
   Badge Stile - Drei Schwierigkeitsstufen
   ================================================ */
.badge-easy {
    background-color: var(--blue-light-2) !important;
    color: white !important;
}

.badge-medium {
    background-color: var(--blue-medium-1) !important;
    color: white !important;
}

.badge-hard {
    background-color: var(--blue-dark-1) !important;
    color: white !important;
}

/* ================================================
   Highlight-Box Stile
   ================================================ */
.highlight-box {
    border-color: var(--blue-medium-1) !important;
}

.highlight-box-icon {
    color: var(--blue-medium-1) !important;
}

.highlight-box-link {
    color: var(--blue-medium-1) !important;
}

.highlight-box-link:hover {
    color: var(--blue-dark-1) !important;
}

/* ================================================
   Hilfe-Button
   ================================================ */
.help-button {
    bottom: 20px;
    right: 20px;
    z-index: 1000;
}

.help-btn {
    background: linear-gradient(135deg, var(--blue-medium-1) 0%, var(--blue-medium-2) 100%) !important;
    color: white !important;
    border: none !important;
}

.help-btn:hover {
    background: linear-gradient(135deg, var(--blue-medium-2) 0%, var(--blue-dark-1) 100%) !important;
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(52, 152, 219, 0.4);
}

/* ================================================
   Hero-Elemente
   ================================================ */
.hero-element-1 {
    font-size: 4rem;
    position: absolute;
    top: 20px;
    right: 50px;
    transform: rotate(20deg);
    opacity: 0.1;
    color: var(--blue-dark-1);
    pointer-events: none;
    z-index: 1;
}

.hero-element-2 {
    font-size: 2.5rem;
    position: absolute;
    bottom: 30px;
    left: 40px;
    transform: rotate(-10deg);
    opacity: 0.1;
    color: var(--blue-dark-1);
    pointer-events: none;
    z-index: 1;
}

.hero-element-3 {
    font-size: 3rem;
    position: absolute;
    top: 50%;
    left: 20px;
    transform: translateY(-50%) rotate(15deg);
    opacity: 0.1;
    color: var(--blue-dark-1);
    pointer-events: none;
    z-index: 1;
}

/* Gleichungssysteme math-elements */
.bg-element.math-element-1,
.bg-element.math-element-2,
.bg-element.math-element-3 {
    opacity: 0.1;
    position: absolute;
    font-family: 'Cambria Math', serif;
    color: var(--blue-dark-1);
    pointer-events: none;
    z-index: 1;
}

.bg-element.math-element-1 {
    font-size: 3.5rem;
    top: 15px;
    left: 30px;
    transform: rotate(-10deg);
}

.bg-element.math-element-2 {
    font-size: 2.5rem;
    bottom: 20px;
    right: 40px;
    transform: rotate(15deg);
}

.bg-element.math-element-3 {
    font-size: 2rem;
    bottom: 25px;
    left: 35%;
    transform: rotate(-5deg);
}

/* Kreis circle-elements */
.bg-element.circle-element-1,
.bg-element.circle-element-2,
.bg-element.circle-element-3 {
    opacity: 0.1;
    position: absolute;
    font-family: 'Cambria Math', serif;
    color: var(--blue-dark-1);
    pointer-events: none;
}

.bg-element.circle-element-1 {
    font-size: 8rem;
    top: 20px;
    left: 10%;
}

.bg-element.circle-element-2 {
    font-size: 2rem;
    bottom: 20px;
    right: 10%;
}

.bg-element.circle-element-3 {
    font-size: 6rem;
    top: 40%;
    right: 15%;
}

@media screen and (max-width: 768px) {
    .hero-element-1,
    .hero-element-2,
    .hero-element-3,
    .bg-element.math-element-1,
    .bg-element.math-element-2,
    .bg-element.math-element-3,
    .bg-element.circle-element-1,
    .bg-element.circle-element-2,
    .bg-element.circle-element-3 {
        font-size: 2rem !important;
        opacity: 0.07;
    }
}

@media screen and (max-width: 480px) {
    .hero-element-1,
    .hero-element-2,
    .bg-element.math-element-1,
    .bg-element.math-element-2,
    .bg-element.math-element-3,
    .bg-element.circle-element-1,
    .bg-element.circle-element-2,
    .bg-element.circle-element-3 {
        display: none;
    }
}

/* ================================================
   Task Card Basis-Stile
   ================================================ */
.task-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    height: 100%;
    border: none;
}

.task-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(30, 60, 114, 0.2);
}

.task-card .card-header {
    padding: 1rem 1.25rem;
    border-bottom: none;
}

.task-card .card-body {
    padding: 1.25rem;
}

/* ================================================
   Timeline (Pi-Geschichte)
   ================================================ */
.timeline {
    position: relative;
    max-width: 1200px;
    margin: 40px auto;
    padding: 20px 0;
}

.timeline::before {
    content: '';
    position: absolute;
    height: 100%;
    width: 4px;
    background-color: var(--blue-medium-1);
    left: 50px;
    top: 0;
    border-radius: 2px;
}

.timeline-item {
    position: relative;
    margin-bottom: 50px;
    padding-left: 100px;
    transition: transform 0.3s, opacity 0.3s;
    opacity: 0;
    transform: translateX(20px);
}

.timeline-item.fade-in {
    opacity: 1;
    transform: translateX(0);
}

.timeline-date {
    position: absolute;
    left: 0;
    top: 0;
    width: 100px;
    padding: 8px 10px;
    background-color: var(--blue-medium-1);
    color: white;
    border-radius: 4px;
    text-align: center;
    font-weight: bold;
    font-size: 0.9rem;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.timeline-content {
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
    border-left: 4px solid var(--blue-medium-1);
}

.timeline-content h3 {
    margin-top: 0;
    color: var(--blue-dark-1);
    margin-bottom: 10px;
}

@media (max-width: 767px) {
    .timeline::before {
        left: 20px;
    }
    .timeline-item {
        padding-left: 60px;
    }
    .timeline-date {
        width: 80px;
        left: -60px;
        font-size: 0.8rem;
    }
}

/* ================================================
   Fact Box / Info Box
   ================================================ */
.fact-box,
.info-box {
    background-color: var(--blue-light-bg);
    border-radius: 8px;
    padding: 20px;
    margin: 30px 0;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
    border-top: 5px solid var(--blue-medium-1);
}

.fact-box h3,
.info-box h4 {
    color: var(--blue-medium-2);
    margin-top: 0;
    margin-bottom: 15px;
}

/* ================================================
   Formula Box
   ================================================ */
.formula-box {
    background-color: #f0f7ff;
    border-radius: 8px;
    padding: 20px;
    margin: 30px 0;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
}

.formula-box h3 {
    color: var(--blue-dark-1);
    margin-top: 0;
    margin-bottom: 15px;
}

.formula {
    background-color: #fff;
    padding: 15px;
    margin: 15px 0;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
    overflow-x: auto;
}

.formula-derivation {
    background-color: #f0f7ff;
    padding: 20px;
    margin: 25px 0;
    border-radius: 8px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
}

.formula-derivation h3 {
    color: var(--blue-dark-1);
    margin-top: 0;
    margin-bottom: 15px;
}

.highlighted-result {
    background-color: var(--blue-light-bg);
    border: 1px solid var(--blue-medium-bg);
    color: var(--blue-dark-1);
    padding: 15px;
    margin: 15px 0;
    border-radius: 8px;
    text-align: center;
    font-weight: bold;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

/* ================================================
   Tabellen
   ================================================ */
.approximation-table,
.measurement-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    font-size: 0.95rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    overflow: hidden;
    background-color: white;
}

.approximation-table th,
.measurement-table th {
    background-color: var(--blue-medium-1);
    color: white;
    padding: 12px 15px;
    text-align: left;
    font-weight: bold;
}

.approximation-table td,
.measurement-table td {
    padding: 10px 15px;
    border-bottom: 1px solid #e0e0e0;
    vertical-align: middle;
}

.approximation-table tr:nth-child(even),
.measurement-table tr:nth-child(even) {
    background-color: #f5f9ff;
}

.approximation-table tr:hover,
.measurement-table tr:hover {
    background-color: var(--blue-light-bg);
}

.measurement-table-container {
    margin: 30px 0;
    background-color: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
}

.measurement-table-container h3 {
    color: var(--blue-medium-2);
    margin-top: 0;
    margin-bottom: 20px;
}

.table-hint {
    margin-top: 15px;
    padding: 10px 15px;
    background-color: var(--blue-light-bg);
    border-radius: 6px;
    border-left: 4px solid var(--blue-medium-1);
}

.table-hint p {
    margin: 0;
    color: var(--blue-medium-2);
}

/* ================================================
   Interactive Element
   ================================================ */
.interactive-element {
    background-color: #fff;
    border-radius: 8px;
    padding: 20px;
    margin: 30px 0;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
    border-top: 5px solid var(--blue-light-1);
}

.interactive-element h3 {
    color: var(--blue-medium-1);
    margin-top: 0;
    margin-bottom: 15px;
}

/* ================================================
   Application Grid
   ================================================ */
.application-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.application-item {
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
}

.application-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.15);
}

.application-icon {
    background-color: var(--blue-medium-1);
    color: white;
    padding: 20px;
    text-align: center;
    font-size: 2rem;
}

.application-item:nth-child(2) .application-icon {
    background-color: var(--blue-dark-1);
}

.application-item:nth-child(3) .application-icon {
    background-color: var(--blue-light-2);
}

.application-item:nth-child(4) .application-icon {
    background-color: var(--blue-medium-2);
}

.application-content {
    padding: 15px;
}

.application-content h4 {
    margin-top: 0;
    color: var(--blue-dark-1);
}

/* ================================================
   Explanation Box
   ================================================ */
.explanation-box {
    background-color: #f5f7fa;
    border-left: 5px solid var(--blue-medium-1);
    padding: 20px;
    margin: 25px 0;
    border-radius: 0 8px 8px 0;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
}

.explanation-box h3 {
    color: var(--blue-medium-2);
    margin-top: 0;
    margin-bottom: 15px;
}

.explanation-box ul {
    padding-left: 20px;
    margin-bottom: 0;
}

.explanation-box li {
    margin-bottom: 8px;
}

/* ================================================
   Example Box
   ================================================ */
.example-box {
    background-color: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 20px;
    margin: 25px 0;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
}

.example-box h3 {
    color: var(--blue-medium-1);
    margin-top: 0;
    margin-bottom: 15px;
    border-bottom: 2px solid #f5f5f5;
    padding-bottom: 8px;
}

.solution-steps {
    background-color: #f9f9f9;
    padding: 15px;
    margin-top: 15px;
    border-radius: 8px;
    border-left: 3px solid var(--blue-medium-1);
}

.solution-steps h4,
.solution-steps h5 {
    color: var(--blue-medium-2);
    margin-top: 0;
    margin-bottom: 10px;
}

/* ================================================
   Interactive Exercise / Quiz
   ================================================ */
.interactive-exercise {
    margin: 30px 0;
    background-color: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
}

.interactive-exercise h3 {
    color: var(--blue-medium-2);
    margin-top: 0;
    margin-bottom: 20px;
}

.quiz-container {
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.quiz-question {
    padding: 20px;
    border-bottom: 1px solid #f0f0f0;
}

.quiz-question:last-child {
    border-bottom: none;
}

.quiz-options {
    margin: 15px 0;
}

.quiz-options label {
    display: block;
    padding: 10px;
    margin-bottom: 5px;
    background-color: #f8f9fa;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.quiz-options label:hover {
    background-color: var(--blue-light-bg);
}

.quiz-options input[type="radio"] {
    margin-right: 10px;
}

/* Quiz-Option als klickbare Karte (für div-basierte Quiz-Optionen) */
.quiz-option {
    display: block;
    padding: 15px;
    margin-bottom: 10px;
    background-color: #f8f9fa;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
}

.quiz-option:hover {
    background-color: var(--blue-light-bg);
    border-color: var(--blue-light-1);
    transform: translateX(5px);
}

.quiz-option.selected {
    background-color: var(--blue-light-bg);
    border-color: var(--blue-medium-1);
    border-width: 3px;
    font-weight: 600;
}

.quiz-option.correct {
    background-color: #d4edda;
    border-color: #28a745;
}

.quiz-option.incorrect {
    background-color: #f8d7da;
    border-color: #dc3545;
}

/* Bruch-Eingabefelder */
.fraction-input {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    margin: 0 10px;
    vertical-align: middle;
}

.fraction-input input[type="number"] {
    width: 60px;
    padding: 5px;
    text-align: center;
    border: 2px solid var(--blue-light-1);
    border-radius: 4px;
    font-size: 1.1rem;
}

.fraction-input input[type="number"]:focus {
    outline: none;
    border-color: var(--blue-medium-1);
    box-shadow: 0 0 5px rgba(52, 152, 219, 0.3);
}

.fraction-divider {
    width: 70px;
    height: 2px;
    background-color: #333;
    margin: 3px 0;
}

.input-field {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 15px 0;
    font-size: 1.2rem;
}

.check-answer {
    background: linear-gradient(135deg, var(--blue-medium-1) 0%, var(--blue-medium-2) 100%);
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s;
}

.check-answer:hover {
    background: linear-gradient(135deg, var(--blue-medium-2) 0%, var(--blue-dark-1) 100%);
    transform: translateY(-2px);
}

.feedback {
    margin-top: 10px;
    padding: 10px;
    border-radius: 5px;
    display: none;
}

.feedback.warning {
    display: block;
    background-color: var(--blue-light-bg);
    border: 1px solid var(--blue-light-1);
    color: var(--blue-dark-1);
}

.feedback.correct {
    display: block;
    background-color: #d4edda;
    border: 1px solid #c3e6cb;
    color: #155724;
}

.feedback.incorrect {
    display: block;
    background-color: #f8d7da;
    border: 1px solid #f5c6cb;
    color: #721c24;
}

/* Aliase für success/error (kompatibel mit mathe10.css) */
.feedback.success {
    display: block;
    background-color: #d4edda;
    border: 1px solid #c3e6cb;
    color: #155724;
}

.feedback.error {
    display: block;
    background-color: #f8d7da;
    border: 1px solid #f5c6cb;
    color: #721c24;
}

/* ================================================
   Next Steps Box
   ================================================ */
.next-steps-box {
    background-color: var(--blue-light-bg);
    border-left: 5px solid var(--blue-medium-1);
    padding: 20px;
    margin: 25px 0;
    border-radius: 0 8px 8px 0;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
}

.next-steps-box h3 {
    color: var(--blue-medium-2);
    margin-top: 0;
    margin-bottom: 15px;
}

.next-steps-box a {
    color: var(--blue-medium-2);
    text-decoration: none;
    transition: color 0.2s;
}

.next-steps-box a:hover {
    color: var(--blue-dark-1);
    text-decoration: underline;
}

/* ================================================
   Exercise Container (Aufgaben-Seiten)
   ================================================ */
.exercise-container {
    background-color: #f9f9f9;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 25px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    border-left: 5px solid var(--blue-medium-1);
}

.exercise-container h4 {
    margin-top: 0;
    color: var(--blue-dark-1);
    border-bottom: 2px solid #e0e0e0;
    padding-bottom: 10px;
}

.exercise-container .hint {
    background-color: var(--blue-light-bg);
    border-left: 4px solid var(--blue-light-1);
    padding: 15px;
    margin: 15px 0;
    border-radius: 0 8px 8px 0;
}

.exercise-container .solution {
    background-color: var(--blue-medium-bg);
    border-left: 4px solid var(--blue-medium-1);
    padding: 15px;
    margin: 15px 0;
    border-radius: 0 8px 8px 0;
}

.exercise-category-btn {
    padding: 12px 20px;
    margin: 0 5px 10px 5px;
    background: linear-gradient(135deg, #f5f5f5 0%, #e0e0e0 100%);
    color: #333;
    border: none;
    border-radius: 4px;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.exercise-category-btn:hover {
    background: linear-gradient(135deg, #ffffff 0%, #f0f0f0 100%);
    transform: translateY(-1px);
}

.exercise-category-btn.active {
    background: linear-gradient(135deg, var(--blue-medium-1) 0%, var(--blue-medium-2) 100%);
    color: white;
}

.hint-btn {
    background: linear-gradient(135deg, var(--blue-light-1) 0%, var(--blue-light-2) 100%);
    color: white;
    border: none;
    border-radius: 4px;
    padding: 10px 16px;
    margin: 5px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.hint-btn:hover {
    background: linear-gradient(135deg, var(--blue-light-2) 0%, var(--blue-medium-1) 100%);
    transform: translateY(-2px);
}

.solution-btn {
    background: linear-gradient(135deg, var(--blue-medium-1) 0%, var(--blue-medium-2) 100%);
    color: white;
    border: none;
    border-radius: 4px;
    padding: 10px 16px;
    margin: 5px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.solution-btn:hover {
    background: linear-gradient(135deg, var(--blue-medium-2) 0%, var(--blue-dark-1) 100%);
    transform: translateY(-2px);
}

.button-group {
    display: flex;
    flex-wrap: wrap;
    margin: 15px 0;
    gap: 10px;
}

.exercise-selector {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    margin: 20px 0 30px 0;
}

.task-category {
    display: none;
}

.task-category.active {
    display: block;
}

/* ================================================
   Gleichungslöser Stile
   ================================================ */
.equation-input {
    margin-bottom: 20px;
    padding: 15px;
    background-color: #f8f9fa;
    border-radius: 10px;
    border-left: 5px solid var(--blue-medium-1);
}

.equation-input label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
    color: var(--blue-medium-2);
}

.equation-input input {
    width: 100%;
    padding: 12px;
    font-size: 16px;
    border: 2px solid var(--blue-light-bg);
    border-radius: 5px;
    transition: all 0.3s;
}

.equation-input input:focus {
    border-color: var(--blue-medium-1);
    outline: none;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
}

.method-selector {
    margin: 20px 0;
    padding: 15px;
    background-color: #f0f8ff;
    border-radius: 8px;
    border-left: 5px solid var(--blue-medium-1);
}

.method-selector h3 {
    margin-top: 0;
    margin-bottom: 15px;
    color: var(--blue-medium-2);
}

.method-options {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.method-option {
    flex: 1;
    min-width: 150px;
    background-color: white;
    border: 2px solid var(--blue-light-bg);
    padding: 12px 15px;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.method-option i {
    margin-right: 8px;
    color: var(--blue-medium-1);
}

.method-option:hover,
.method-option.selected {
    border-color: var(--blue-medium-1);
    background-color: var(--blue-light-bg);
}

.method-option.selected {
    font-weight: bold;
}

.solution-step {
    padding: 20px;
    background-color: white;
    border-radius: 10px;
    margin-bottom: 20px;
    border-left: 5px solid var(--blue-medium-1);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    display: none;
}

.solution-step.active {
    display: block;
    animation: fadeIn 0.5s ease-in-out;
}

.solution-step.solution-final {
    background-color: var(--blue-light-bg);
    border-left: 5px solid var(--blue-medium-2);
}

.step-title {
    font-size: 1.2rem;
    color: var(--blue-medium-2);
    margin-top: 0;
    margin-bottom: 10px;
    font-weight: bold;
}

.step-explanation {
    margin-top: 15px;
    color: #666;
    line-height: 1.6;
}

.error-message {
    color: var(--feedback-error);
    margin-top: 10px;
    padding: 10px;
    background-color: var(--blue-light-bg);
    border-radius: 5px;
    border-left: 5px solid var(--feedback-error);
    display: none;
}

/* ================================================
   GeoGebra Container
   ================================================ */
/* GeoGebra Container nutzt jetzt Bootstrap .ratio */
.geogebra-wrapper {
    margin: 25px 0;
    background-color: #f5f5f5;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* ================================================
   CTA-Buttons
   ================================================ */
.cta-button {
    display: inline-block;
    background: linear-gradient(135deg, var(--blue-medium-1) 0%, var(--blue-medium-2) 100%);
    color: white;
    padding: 15px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    margin-top: 20px;
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.3);
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(52, 152, 219, 0.4);
    color: white;
    text-decoration: none;
}

.cta-button i {
    margin-right: 8px;
}

/* ================================================
   Highlight Links
   ================================================ */
.highlight-link {
    background-color: #f8f9fa;
    padding: 15px;
    border-radius: 5px;
    border-left: 4px solid var(--blue-medium-1);
    margin: 20px 0;
    display: flex;
    align-items: center;
    transition: all 0.3s ease;
}

.highlight-link:hover {
    background-color: var(--blue-light-bg);
    transform: translateX(5px);
}

.highlight-link i {
    font-size: 2rem;
    margin-right: 15px;
    color: var(--blue-medium-1);
}

.highlight-link-content {
    flex: 1;
}

.highlight-link h3 {
    margin: 0 0 5px 0;
    color: var(--blue-dark-1);
}

.highlight-link a {
    color: var(--blue-medium-1);
    text-decoration: none;
    font-weight: 600;
    display: inline-block;
    margin-top: 10px;
}

.highlight-link a:hover {
    text-decoration: underline;
}

/* ================================================
   Lösungsboxen
   ================================================ */
.solution-box {
    background: linear-gradient(135deg, var(--blue-light-bg) 0%, var(--blue-medium-bg) 100%);
    border-radius: 10px;
    padding: 20px;
    border-left: 5px solid var(--blue-medium-1);
    margin: 25px 0;
}

.solution-box h4 {
    color: var(--blue-medium-2);
    margin-top: 0;
}

/* ================================================
   Step-Boxen
   ================================================ */
.step {
    margin: 20px 0;
    padding: 15px;
    background-color: #f8f9fa;
    border-left: 5px solid var(--blue-medium-1);
    border-radius: 8px;
    position: relative;
    transition: transform 0.2s;
}

.step:hover {
    transform: translateX(5px);
}

/* ================================================
   Mathematische Elemente
   ================================================ */
.equation {
    font-family: 'Cambria Math', 'Times New Roman', serif;
    font-size: 1.3rem;
    margin: 25px 0;
    text-align: center;
    color: #2c3e50;
    line-height: 1.8;
}

.highlight {
    background-color: var(--blue-light-bg);
    padding: 3px 6px;
    border-radius: 4px;
    color: var(--blue-dark-1);
    font-weight: 500;
}

.explanation {
    font-style: italic;
    color: #7f8c8d;
    background-color: #f8f9fa;
    padding: 10px 15px;
    border-radius: 8px;
    margin: 10px 0;
    font-size: 0.95rem;
}

/* ================================================
   Baumdiagramm-Elemente
   ================================================ */
.tree-container {
    background-color: white;
    border-radius: 10px;
    padding: 20px;
    margin: 20px 0;
    box-shadow: 0 3px 10px rgba(0,0,0,0.05);
    overflow-x: auto;
}

.tree-node {
    display: inline-block;
    padding: 10px 15px;
    border-radius: 8px;
    background-color: var(--blue-light-bg);
    border: 2px solid var(--blue-medium-1);
    margin: 5px;
    font-weight: 500;
}

.tree-branch {
    stroke: var(--blue-medium-2);
    stroke-width: 2;
}

/* ================================================
   Content Wrapper
   ================================================ */
.content-wrapper,
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.content-wrapper h1 {
    color: var(--blue-dark-1);
    margin-bottom: 25px;
    font-size: 2rem;
    font-weight: 600;
    text-align: center;
    position: relative;
    padding-bottom: 15px;
}

.content-wrapper h1::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: linear-gradient(90deg, var(--blue-dark-1), var(--blue-light-1));
    border-radius: 2px;
}

.content-wrapper h2 {
    color: var(--blue-medium-2);
    margin: 20px 0;
    font-size: 1.4rem;
    font-weight: 600;
}

.content-wrapper h3 {
    color: var(--blue-medium-1);
    margin-top: 0;
    font-size: 1.2rem;
    font-weight: 500;
}

/* ================================================
   Graph-Container
   ================================================ */
.graph-container {
    width: 100%;
    height: 450px;
    margin: 25px 0;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
}

/* ================================================
   Navigations-Elemente
   ================================================ */
.navigation-container {
    display: flex;
    justify-content: space-between;
    margin-bottom: 30px;
    align-items: center;
}

.back-link {
    display: flex;
    align-items: center;
    color: var(--blue-dark-1);
    text-decoration: none;
    font-weight: 500;
    transition: transform 0.2s;
}

.back-link i {
    margin-right: 8px;
}

.back-link:hover {
    transform: translateX(-3px);
    color: var(--blue-medium-2);
}

/* ================================================
   Page Footer
   ================================================ */
.page-footer {
    background: linear-gradient(135deg, var(--blue-dark-1) 0%, var(--blue-medium-2) 100%);
    color: white;
    padding: 20px;
    text-align: center;
    font-size: 0.9rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: 40px;
}

.page-footer p {
    margin: 0;
}

/* ================================================
   Animationen
   ================================================ */
.fade-in {
    opacity: 0;
    animation: fadeIn 1s forwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ================================================
   Responsive Anpassungen
   ================================================ */
@media screen and (max-width: 768px) {
    .content-wrapper,
    .main-content {
        padding: 15px;
    }

    .content-wrapper h1 {
        font-size: 1.6rem;
    }

    .content-wrapper h2 {
        font-size: 1.2rem;
    }

    .equation {
        font-size: 1.1rem;
    }

    .graph-container {
        height: 350px;
    }

    .method-options {
        flex-direction: column;
    }

    .method-option {
        width: 100%;
    }

    .exercise-category-btn {
        padding: 10px 15px;
        font-size: 14px;
        flex-grow: 1;
        text-align: center;
        min-width: 30%;
    }

    .highlight-link {
        flex-direction: column;
        text-align: center;
    }

    .highlight-link i {
        margin-right: 0;
        margin-bottom: 10px;
    }
}

@media screen and (max-width: 480px) {
    .content-wrapper h1 {
        font-size: 1.4rem;
    }

    .content-wrapper h2 {
        font-size: 1.1rem;
    }

    .equation {
        font-size: 1rem;
    }

    .step {
        padding: 12px;
    }

    .solution-box {
        padding: 15px;
    }

    .graph-container {
        height: 280px;
    }

    .check-answer {
        width: 100%;
        padding: 12px;
    }
}

/* Touch-Optimierungen */
@media (pointer: coarse) {
    .quiz-options label,
    .check-answer,
    a {
        min-height: 44px;
        display: flex;
        align-items: center;
    }

    .quiz-options input[type="radio"] {
        min-width: 20px;
        min-height: 20px;
    }
}

/* ================================================
   Proof Steps
   ================================================ */
.proof-steps {
    counter-reset: step-counter;
    list-style-type: none;
    padding-left: 0;
}

.proof-steps li {
    position: relative;
    padding-left: 40px;
    margin-bottom: 20px;
    background-color: #f8f9fa;
    padding: 15px 15px 15px 50px;
    border-radius: 8px;
}

.proof-steps li:before {
    content: counter(step-counter);
    counter-increment: step-counter;
    position: absolute;
    left: 15px;
    top: 15px;
    width: 25px;
    height: 25px;
    background-color: var(--blue-medium-1);
    color: white;
    border-radius: 50%;
    text-align: center;
    line-height: 25px;
    font-weight: bold;
}

/* ================================================
   Applet Scaler (GeoGebra)
   ================================================ */
.applet_scaler {
    width: 100% !important;
    height: 550px !important;
    transform: none !important;
    zoom: 1.15 !important;
}

/* ================================================
   Section Styling
   ================================================ */
.section {
    margin-bottom: 40px;
}

/* ================================================
   Animation Title
   ================================================ */
.animation-title {
    margin-top: 30px;
    margin-bottom: 20px;
    text-align: left;
}

.animation-title h2 {
    color: var(--blue-dark-1);
    margin-bottom: 10px;
    font-size: 1.6rem;
}

.animation-title p {
    color: #555;
    max-width: 800px;
}

/* ================================================
   Themen-Karten Header Farben
   ================================================ */
.card-header-probability {
    background: linear-gradient(135deg, #9b59b6 0%, #8e44ad 100%) !important;
    color: white !important;
}

.card-header-circle {
    background: linear-gradient(135deg, #2ecc71 0%, #27ae60 100%) !important;
    color: white !important;
}

/* ================================================
   Hero Hintergrund-Elemente
   ================================================ */
.bg-element-formula {
    font-size: 3rem;
    bottom: 20px;
    right: 40px;
    transform: rotate(15deg);
}

/* ================================================
   Utility-Klassen
   ================================================ */
.hidden {
    display: none;
}

/* ================================================
   Task Navigation
   ================================================ */
.task-navigation {
    display: flex;
    justify-content: space-between;
    margin-top: 30px;
    gap: 10px;
}

@media screen and (max-width: 768px) {
    .task-navigation {
        flex-direction: column;
    }

    .task-navigation button {
        width: 100%;
    }
}

/* ================================================
   Methoden-Buttons (Lösungsverfahren-Auswahl)
   ================================================ */
.method-btn {
    display: flex;
    width: 100%;
    text-align: left;
    margin-bottom: 15px;
    background: linear-gradient(135deg, #f5f7fa 0%, #e9edf2 100%);
    color: #2c3e50;
    border-left: 5px solid var(--blue-medium-1);
    padding: 15px;
    border-radius: 8px;
    justify-content: flex-start;
    font-weight: bold;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
    cursor: pointer;
    border: none;
    transition: all 0.3s ease;
}

.method-btn i {
    margin-right: 8px;
    color: var(--blue-medium-1);
}

.method-btn:hover {
    background: linear-gradient(135deg, var(--blue-light-bg) 0%, var(--blue-medium-bg) 100%);
    transform: translateY(-2px);
    color: var(--blue-dark-1);
}

/* ================================================
   Zurück-Button (grau)
   ================================================ */
.back-btn {
    background: linear-gradient(135deg, #95a5a6 0%, #7f8c8d 100%) !important;
}

.back-btn:hover {
    background: linear-gradient(135deg, #7f8c8d 0%, #6c7a7a 100%) !important;
}

/* ================================================
   Aufgaben-Container (mit blauem Border)
   ================================================ */
.task-container {
    background-color: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    margin-bottom: 25px;
    border-top: 5px solid var(--blue-medium-1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.task-container:hover {
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.12);
}

/* ================================================
   Wahrscheinlichkeits-Übungen
   ================================================ */
.probability-input {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

.probability-input label {
    margin-right: 10px;
    font-weight: bold;
    width: 300px;
}

.probability-input input {
    padding: 10px;
    border: 2px solid var(--blue-medium-bg);
    border-radius: 5px;
    width: 120px;
    font-size: 16px;
    transition: border-color 0.3s;
}

.probability-input input:focus {
    border-color: var(--blue-medium-1);
    outline: none;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
}

.input-with-percent {
    position: relative;
    width: 120px;
}

.input-with-percent input {
    width: 100%;
    padding-right: 30px;
}

.input-with-percent:after {
    content: '%';
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    color: #777;
}

.solution-area {
    margin-top: 20px;
    padding: 20px;
    border-radius: 10px;
    background-color: var(--blue-light-bg);
    display: none;
}

.solution-area.correct {
    background-color: #d4edda;
    border-left: 5px solid #28a745;
}

.solution-area.incorrect {
    background-color: #f8d7da;
    border-left: 5px solid #dc3545;
}

.solution-area.hint {
    background-color: #fff3cd;
    border-left: 5px solid #ffc107;
}

.difficulty-selector {
    margin: 20px 0;
    padding: 15px;
    background-color: var(--blue-light-bg);
    border-radius: 8px;
    border-left: 5px solid var(--blue-medium-1);
}

.difficulty-selector h3 {
    margin-top: 0;
    margin-bottom: 15px;
    color: var(--blue-medium-2);
}

.difficulty-options {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.difficulty-option {
    background-color: white;
    border: 2px solid var(--blue-medium-bg);
    padding: 12px 15px;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s;
}

.difficulty-option:hover,
.difficulty-option.selected {
    border-color: var(--blue-medium-1);
    background-color: var(--blue-light-bg);
}

.difficulty-option.selected {
    font-weight: bold;
}

.problem-hint-container {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 20px;
}

.problem-container {
    flex: 2;
    min-width: 300px;
    border: 1px solid var(--blue-medium-bg);
    border-radius: 10px;
    padding: 20px;
    background-color: white;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.hint-container {
    flex: 1;
    min-width: 250px;
    padding: 20px;
    background-color: #fff3cd;
    border-radius: 10px;
    border-left: 5px solid #ffc107;
}

.score-display {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding: 15px;
    background: linear-gradient(135deg, var(--blue-medium-1) 0%, var(--blue-medium-2) 100%);
    color: white;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.score-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.score-label {
    font-size: 0.9rem;
    margin-bottom: 5px;
}

.score-value {
    font-size: 1.5rem;
    font-weight: bold;
}

.progress-container {
    width: 100%;
    height: 10px;
    background-color: #e0e0e0;
    border-radius: 5px;
    margin-top: 10px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--blue-medium-1), var(--blue-medium-2));
    width: 0%;
    transition: width 0.5s;
}

.tree-diagram-container {
    margin: 20px 0;
    padding: 20px;
    background-color: #f8f9fa;
    border-radius: 8px;
    overflow-x: auto;
}

/* ================================================
   Baumdiagramm-Generator Styles
   ================================================ */
.generator-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-top: 30px;
}

@media screen and (max-width: 992px) {
    .generator-layout {
        grid-template-columns: 1fr;
    }
}

.control-panel {
    background: white;
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    border-top: 5px solid var(--blue-medium-1);
    grid-column: 1 / -1; /* Volle Breite über alle Spalten */
}

.results-panel {
    background: white;
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    border-top: 5px solid var(--blue-dark-1);
    grid-column: 1 / -1; /* Volle Breite über alle Spalten */
}

/* Tabs */
.tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--blue-light-bg);
    padding-bottom: 10px;
}

.tab {
    padding: 10px 20px;
    border: none;
    background: var(--blue-light-bg);
    color: var(--blue-dark-1);
    border-radius: 8px 8px 0 0;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
}

.tab:hover {
    background: var(--blue-medium-bg);
}

.tab.active {
    background: linear-gradient(135deg, var(--blue-medium-1) 0%, var(--blue-medium-2) 100%);
    color: white;
}

/* Spezifische Regeln nur für Generator Tabs */
.tab-container .tab-content {
    display: none;
}

.tab-container .tab-content.active {
    display: block;
}

/* Bootstrap Nav-Tabs Styling */
.nav-tabs {
    border-bottom: 2px solid var(--blue-light-1);
    margin-bottom: 20px;
}

.nav-tabs .nav-link {
    color: var(--blue-dark-1);
    background-color: #d4e6f1;
    border: 2px solid var(--blue-light-1);
    border-radius: 8px 8px 0 0;
    padding: 12px 20px;
    font-weight: 600;
    transition: all 0.3s ease;
    margin-right: 5px;
}

.nav-tabs .nav-link:hover {
    background-color: var(--blue-light-1);
    border-color: var(--blue-medium-1);
    color: white;
}

.nav-tabs .nav-link.active {
    background: linear-gradient(135deg, var(--blue-medium-1) 0%, var(--blue-medium-2) 100%);
    color: white;
    border-color: var(--blue-medium-1);
}

.nav-tabs .nav-link i {
    margin-right: 8px;
}

/* Tab Content Panes */
.tab-pane {
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Generator Steps */
.generator-step {
    display: none;
    animation: fadeIn 0.3s ease;
}

.generator-step.active {
    display: block;
}

/* Stage Container */
.stage-container {
    background: var(--blue-light-bg);
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 20px;
    border-left: 4px solid var(--blue-medium-1);
}

.stage-container h3 {
    color: var(--blue-dark-1);
    margin-top: 0;
    margin-bottom: 15px;
}

/* Form Groups */
.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: var(--blue-dark-1);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 10px 15px;
    border: 2px solid var(--blue-light-bg);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--blue-medium-1);
}

/* Outcome Groups */
.outcome-group {
    background: white;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 10px;
}

.add-outcome,
.remove-outcome {
    padding: 8px 15px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
}

.add-outcome {
    background: var(--blue-light-bg);
    color: var(--blue-medium-1);
    width: 100%;
    margin-top: 10px;
}

.add-outcome:hover {
    background: var(--blue-medium-bg);
}

.remove-outcome {
    background: #fee2e2;
    color: #dc2626;
    min-width: 40px;
}

.remove-outcome:hover {
    background: #fecaca;
}

/* Step Buttons */
.step-buttons {
    display: flex;
    justify-content: space-between;
    margin-top: 20px;
    gap: 10px;
}

.next-btn,
.back-btn {
    padding: 12px 25px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
}

.next-btn {
    background: linear-gradient(135deg, var(--blue-medium-1) 0%, var(--blue-medium-2) 100%);
    color: white;
}

.next-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.back-btn {
    background: #e5e7eb;
    color: #374151;
}

.back-btn:hover {
    background: #d1d5db;
}

/* Example Trees */
.example-tree {
    background: var(--blue-light-bg);
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 15px;
    cursor: pointer;
    transition: all 0.3s ease;
    border-left: 4px solid var(--blue-medium-1);
}

.example-tree:hover {
    transform: translateX(5px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.example-tree h3 {
    color: var(--blue-dark-1);
    margin-top: 0;
    margin-bottom: 10px;
}

.example-tree p {
    color: #666;
    margin: 0;
    font-size: 0.95rem;
}

/* Tree Canvas */
.tree-container {
    background: #f8f9fa;
    border-radius: 10px;
    padding: 20px;
    min-height: 300px;
    overflow-x: auto;
    margin-bottom: 20px;
}

#tree-canvas svg {
    display: block;
    margin: 0 auto;
}

#tree-canvas .link {
    fill: none;
    stroke: var(--blue-medium-1);
    stroke-width: 2px;
}

#tree-canvas .node circle {
    stroke: white;
    stroke-width: 2px;
}

#tree-canvas .node text {
    font-size: 12px;
    fill: #333;
}

/* Probability Results */
.probability-results {
    background: var(--blue-light-bg);
    border-radius: 10px;
    padding: 20px;
}

.probability-results h3 {
    color: var(--blue-dark-1);
    margin-top: 0;
}

.probability-item {
    background: white;
    border-radius: 8px;
    padding: 15px;
    margin-bottom: 10px;
    border-left: 4px solid var(--blue-medium-1);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background: white;
    border-radius: 12px;
    padding: 30px;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
}

.close-modal {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 28px;
    cursor: pointer;
    color: #666;
}

.close-modal:hover {
    color: #333;
}

/* Generator Footer */
.generator-footer {
    background: linear-gradient(135deg, var(--blue-dark-1) 0%, var(--blue-dark-2) 100%);
    color: white;
    padding: 20px;
    text-align: center;
    margin-top: 40px;
    border-radius: 0 0 12px 12px;
}

.tree-diagram-svg {
    width: 100%;
    min-height: 300px;
}

.tree-diagram {
    max-width: 100%;
    margin: 20px 0;
    display: block;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.mc-options {
    margin: 15px 0;
}

.mc-option {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
    padding: 10px;
    border: 2px solid #e0e0e0;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s;
}

.mc-option:hover {
    border-color: var(--blue-medium-1);
    background-color: var(--blue-light-bg);
}

.mc-option.selected {
    border-color: var(--blue-medium-1);
    background-color: var(--blue-light-bg);
}

.mc-option input[type="radio"] {
    margin-right: 10px;
}

.disabled {
    opacity: 0.5;
    cursor: not-allowed !important;
    pointer-events: none;
}

@media screen and (max-width: 768px) {
    .probability-input {
        flex-direction: column;
        align-items: flex-start;
    }

    .probability-input label {
        margin-bottom: 5px;
        width: auto;
    }

    .difficulty-options {
        flex-direction: column;
    }

    .score-display {
        flex-direction: column;
        gap: 10px;
    }
}

/* ================================================
   BRUCHRECHNUNG-SPEZIFISCHE STYLES
   Übernommen aus bruchrechnung.css
   ================================================ */

/* ================================================
   Bruchdarstellung
   ================================================ */
.fraction {
    display: inline-block;
    text-align: center;
    vertical-align: middle;
    margin: 0 5px;
}

.fraction .numerator {
    border-bottom: 2px solid #333;
    padding: 0 5px 3px 5px;
    margin-bottom: 2px;
    display: block;
}

.fraction .denominator {
    display: block;
    padding: 3px 5px 0 5px;
}

.fraction-large {
    font-size: 1.8rem;
    margin: 15px 10px;
}

.fraction-large .numerator {
    border-bottom: 3px solid #333;
    padding: 0 8px 5px 8px;
}

/* ================================================
   Bruch-Visualisierung
   ================================================ */
.fraction-visual {
    display: inline-block;
    margin: 20px;
    text-align: center;
}

.fraction-circle, .fraction-rectangle {
    margin: 15px auto;
    position: relative;
}

.fraction-circle {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    border: 2px solid #333;
    overflow: hidden;
}

.fraction-rectangle {
    width: 300px;
    height: 80px;
    border: 2px solid #333;
    display: flex;
}

.fraction-part {
    height: 100%;
    display: inline-block;
    box-sizing: border-box;
    border-right: 1px dashed #777;
    flex-grow: 1;
}

.fraction-part:last-child {
    border-right: none;
}

.fraction-part.highlighted {
    background-color: var(--blue-medium-1);
}

.fraction-part.highlighted:nth-child(-n+3) {
    flex-grow: 3;
}

/* ================================================
   Regel- und Formelboxen
   ================================================ */
.rule-box {
    background-color: var(--blue-light-bg);
    padding: 20px;
    border-radius: 10px;
    margin: 20px 0;
    border-left: 5px solid var(--blue-medium-1);
    position: relative;
}

.rule-title {
    font-size: 1.4rem;
    color: var(--blue-dark-1);
    margin-top: 0;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    font-weight: bold;
}

.rule-title i {
    margin-right: 10px;
    color: var(--blue-dark-1);
}

.rule-box:hover .rule-title {
    color: var(--blue-dark-2);
}

.rule-formula {
    background-color: white;
    padding: 15px;
    border-radius: 8px;
    margin: 15px 0;
    text-align: center;
    font-family: 'Cambria Math', 'Times New Roman', serif;
    font-size: 1.3rem;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

/* ================================================
   Beispiel- und Tippboxen
   ================================================ */
.example-box {
    background-color: #fff;
    padding: 20px;
    border-radius: 10px;
    margin: 20px 0;
    border-left: 5px solid var(--blue-medium-2);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

.example-title {
    color: var(--blue-dark-1);
    margin-top: 0;
    display: flex;
    align-items: center;
}

.example-title i {
    margin-right: 10px;
}

.tip-box {
    background-color: var(--blue-light-bg);
    padding: 15px;
    border-radius: 8px;
    margin: 15px 0;
    border-left: 5px solid var(--blue-light-2);
}

.tip-title {
    color: var(--blue-dark-1);
    margin-top: 0;
    display: flex;
    align-items: center;
}

.tip-title i {
    margin-right: 10px;
}

/* ================================================
   Schritte und Übungen
   ================================================ */
.step {
    margin: 20px 0;
    padding: 15px;
    background-color: #f8f9fa;
    border-left: 5px solid var(--blue-medium-1);
    border-radius: 8px;
    position: relative;
    transition: transform 0.2s;
}

.step:hover {
    transform: translateX(5px);
}

.step-number {
    position: absolute;
    top: -10px;
    left: -10px;
    background-color: var(--blue-medium-1);
    color: white;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: bold;
}

.step h3 {
    color: var(--blue-dark-1);
    margin-top: 0;
}

.exercise-container {
    border: 1px solid #e0e0e0;
    border-radius: 10px;
    padding: 20px;
    margin: 20px 0;
    background-color: #f8f9fa;
}

.exercise-title {
    margin-top: 0;
    color: var(--blue-dark-1);
    font-weight: bold;
}

.exercise-title i {
    color: var(--blue-dark-1);
    margin-right: 10px;
}

.exercise-options {
    margin-top: 15px;
}

/* ================================================
   Interaktive Elemente
   ================================================ */
.interactive-container {
    background-color: var(--blue-light-bg);
    padding: 20px;
    border-radius: 10px;
    margin: 20px 0;
    text-align: center;
}

.interactive-element {
    display: inline-block;
    margin: 10px;
    cursor: pointer;
}

/* ================================================
   Hervorhebungen und Animationen
   ================================================ */
.highlight {
    background-color: var(--blue-light-bg);
    padding: 2px 5px;
    border-radius: 4px;
    font-weight: bold;
    color: var(--blue-dark-2);
}

.fraction-animation {
    transition: all 0.5s ease;
}

.fraction-animation:hover {
    transform: scale(1.1);
}

/* ================================================
   Erweitern/Kürzen Visualisierung
   ================================================ */
.expand-reduce-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 20px 0;
}

.arrow-right {
    font-size: 2rem;
    margin: 0 20px;
    color: var(--blue-medium-1);
}

/* ================================================
   Vergleichstabelle
   ================================================ */
.fraction-comparison {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    border-radius: 8px;
    overflow: hidden;
}

.fraction-comparison th {
    background-color: var(--blue-medium-1);
    color: white;
    padding: 15px;
    text-align: left;
}

.fraction-comparison td {
    padding: 15px;
    border-bottom: 1px solid #e0e0e0;
}

.fraction-comparison tr:nth-child(even) {
    background-color: var(--blue-light-bg);
}

/* ================================================
   Lösungs- und Spielelemente
   ================================================ */
.solution-box {
    background: linear-gradient(135deg, var(--blue-light-bg) 0%, var(--blue-medium-bg) 100%);
    border-radius: 10px;
    padding: 20px;
    border-left: 5px solid var(--blue-medium-1);
    margin: 25px 0;
}

.solution-box h3 {
    color: var(--blue-medium-2);
    margin-top: 0;
}

.game-container {
    background-color: var(--blue-light-bg);
    padding: 20px;
    border-radius: 10px;
    margin: 20px 0;
    text-align: center;
}

/* ================================================
   Hinweis- und Navigationsbuttons
   ================================================ */
.show-hint {
    background: none;
    border: none;
    color: var(--blue-medium-1);
    cursor: pointer;
    font-size: 14px;
    padding: 8px 12px;
    margin-top: 10px;
    border-radius: 4px;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    text-decoration: none;
    border: 1px solid #e0e0e0;
    background-color: #f8f9fa;
}

.show-hint:hover {
    background-color: var(--blue-light-bg);
    color: var(--blue-medium-2);
    border-color: var(--blue-medium-1);
    transform: translateY(-2px);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.show-hint:before {
    content: "\f0eb";
    font-family: "Font Awesome 5 Free";
    font-weight: 900;
    margin-right: 8px;
}

/* ================================================
   Übungs-Seite Styles (uebung.php)
   ================================================ */

/* Schwierigkeitsauswahl */
.difficulty-selection {
    margin: 30px 0;
    padding: 20px;
    background-color: var(--blue-light-bg);
    border-radius: 10px;
}

.difficulty-selection h2 {
    margin-bottom: 20px;
    color: var(--blue-dark-1);
}

.button-group {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    justify-content: center;
}

.button-group .cta-button {
    flex: 1;
    min-width: 200px;
}

.button-group .cta-button.active {
    background: linear-gradient(135deg, var(--blue-dark-1) 0%, var(--blue-dark-2) 100%);
    transform: scale(1.05);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

/* Übungs-Level Container */
.exercise-level {
    margin: 30px 0;
    padding: 20px;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.exercise-level h2 {
    color: var(--blue-dark-1);
    margin-bottom: 20px;
}

.level-1,
.level-2,
.level-3 {
    display: none;
}

.level-1.active,
.level-2.active,
.level-3.active {
    display: block;
}

/* Einzelne Übung */
.exercise-item {
    margin: 30px 0;
    padding: 25px;
    background-color: #f8f9fa;
    border-left: 5px solid var(--blue-medium-1);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.exercise-item:hover {
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transform: translateX(5px);
}

.exercise-item.completed {
    border-left-color: #28a745;
    background-color: #d4edda;
}

.exercise-item h3 {
    color: var(--blue-dark-1);
    margin-bottom: 15px;
}

.exercise-question {
    font-size: 1.1rem;
    margin-bottom: 20px;
    color: #333;
}

/* Übungs-Formular */
.exercise-form {
    margin-top: 20px;
}

/* Hinweis-Box */
.hint-box {
    margin-top: 15px;
    padding: 15px;
    background-color: var(--blue-light-bg);
    border-left: 4px solid var(--blue-medium-1);
    border-radius: 5px;
    display: none;
}

.hint-box p {
    margin-bottom: 10px;
    color: var(--blue-dark-1);
}

.hint-box p:last-child {
    margin-bottom: 0;
}

/* Belohnungssystem */
.rewards-container {
    margin: 40px 0;
    padding: 30px;
    background: linear-gradient(135deg, var(--blue-light-bg) 0%, #fff 100%);
    border-radius: 15px;
    border: 2px solid var(--blue-light-1);
}

.rewards-container h2 {
    color: var(--blue-dark-1);
    margin-bottom: 10px;
}

.achievements {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 20px;
}

.achievement-badge {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
    background: linear-gradient(135deg, var(--blue-medium-1) 0%, var(--blue-medium-2) 100%);
    border-radius: 10px;
    color: white;
    font-weight: 600;
    text-align: center;
    min-width: 150px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
}

.achievement-badge i {
    font-size: 2rem;
    margin-bottom: 10px;
}

.achievement-badge[id="badge-level1"] {
    background: linear-gradient(135deg, var(--blue-light-1) 0%, var(--blue-light-2) 100%);
}

.achievement-badge[id="badge-level2"] {
    background: linear-gradient(135deg, var(--blue-medium-1) 0%, var(--blue-medium-2) 100%);
}

.achievement-badge[id="badge-level3"] {
    background: linear-gradient(135deg, var(--blue-dark-1) 0%, var(--blue-dark-2) 100%);
}

.achievement-badge[id="badge-perfect"] {
    background: linear-gradient(135deg, var(--blue-medium-2) 0%, var(--blue-dark-1) 100%);
}

.achievement-badge:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.nav-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 15px;
    margin: 10px 5px;
    border-radius: 8px;
    background: linear-gradient(to right, var(--blue-medium-1), var(--blue-medium-2));
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border: none;
    min-width: 180px;
}

.nav-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 7px 10px rgba(0, 0, 0, 0.15);
    background: linear-gradient(to right, var(--blue-medium-2), var(--blue-medium-1));
    color: white;
}

.nav-button i {
    margin-right: 8px;
    font-size: 16px;
}

.nav-button:nth-child(2) i {
    margin-right: 0;
    margin-left: 8px;
    order: 2;
}

.task-navigation {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin: 30px 0;
    padding: 15px;
    background-color: #f8f9fa;
    border-radius: 10px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

/* ================================================
   Responsive Anpassungen für Bruchrechnung
   ================================================ */
@media (max-width: 768px) {
    .task-navigation {
        flex-direction: column;
    }
    
    .nav-button {
        width: 100%;
        margin: 5px 0;
    }
    
    .fraction-visual {
        margin: 10px;
    }
    
    .expand-reduce-visual {
        flex-direction: column;
    }
    
    .arrow-right {
        transform: rotate(90deg);
        margin: 10px 0;
    }
}

/* ================================================
   Kreisrechner Styling
   ================================================ */
.calculator {
    background: linear-gradient(135deg, #ebf5fb 0%, #d4e6f1 100%);
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 5px 20px rgba(52, 152, 219, 0.2);
    max-width: 500px;
    margin: 0 auto;
}

.calculator .input-group {
    display: flex;
    flex-direction: column;
    margin-bottom: 20px;
    gap: 8px;
}

.calculator .input-group label {
    font-weight: 600;
    color: var(--blue-dark-1);
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.calculator .input-group label i {
    color: var(--blue-medium-1);
}

.calculator .input-wrapper {
    display: flex;
    align-items: center;
    background-color: white;
    border: 2px solid var(--blue-light-2);
    border-radius: 10px;
    padding: 5px 15px;
    transition: all 0.3s ease;
}

.calculator .input-wrapper:focus-within {
    border-color: var(--blue-medium-1);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.calculator .input-group input {
    flex: 1;
    border: none;
    outline: none;
    padding: 10px;
    font-size: 1.1rem;
    background: transparent;
    color: var(--blue-dark-2);
}

.calculator .input-group input::placeholder {
    color: #a0c4d8;
    font-style: italic;
}

.calculator .input-group span {
    color: var(--blue-medium-2);
    font-weight: 600;
    font-size: 1rem;
    min-width: 35px;
    text-align: right;
}

.calculator button {
    width: 100%;
    margin-top: 10px;
    padding: 12px;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.calculator .btn-secondary {
    background: linear-gradient(135deg, var(--blue-light-1) 0%, var(--blue-light-2) 100%);
    border: none;
    color: white;
}

.calculator .btn-secondary:hover {
    background: linear-gradient(135deg, var(--blue-light-2) 0%, var(--blue-medium-1) 100%);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(93, 173, 226, 0.4);
}

/* Responsive Anpassungen für Kreisrechner */
@media (max-width: 576px) {
    .calculator {
        padding: 20px;
    }

    .calculator .input-group label {
        font-size: 0.9rem;
    }

    .calculator .input-group input {
        font-size: 1rem;
    }
}

/* ================================================
   Gleichungssysteme - Lösungsverfahren (methoden.php)
   Bootstrap-basierte Styles
   ================================================ */

/* Method Icon Styles */
.method-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: white;
    flex-shrink: 0;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.15);
}

.method-icon-einsetzung {
    background: linear-gradient(135deg, var(--blue-light-1) 0%, var(--blue-light-2) 100%);
}

.method-icon-gleichsetzung {
    background: linear-gradient(135deg, var(--blue-medium-1) 0%, var(--blue-medium-2) 100%);
}

.method-icon-addition {
    background: linear-gradient(135deg, var(--blue-dark-1) 0%, var(--blue-dark-2) 100%);
}

.method-icon-grafisch {
    background: linear-gradient(135deg, var(--blue-medium-2) 0%, var(--blue-dark-1) 100%);
}

/* Step Box Styles */
.step-box {
    background-color: #f8f9fa;
    border-left: 4px solid var(--blue-medium-1);
    border-radius: 8px;
    padding: 1rem;
    transition: transform 0.2s ease, background-color 0.2s ease;
}

.step-box:hover {
    transform: translateX(5px);
    background-color: var(--blue-light-bg);
}

.step-box-einsetzung {
    border-left-color: var(--blue-light-2);
}

.step-box-gleichsetzung {
    border-left-color: var(--blue-medium-1);
}

.step-box-addition {
    border-left-color: var(--blue-dark-1);
}

.step-box-grafisch {
    border-left-color: var(--blue-medium-2);
}

/* Equation System Styles */
.equation-system {
    font-family: 'Cambria Math', 'Times New Roman', serif;
    font-size: 1.3rem;
    color: #2c3e50;
    line-height: 1.8;
}

/* Pros and Cons Card Styles */
.pros-card {
    background: linear-gradient(135deg, var(--blue-light-bg) 0%, #d4e6f1 100%);
    border-left: 4px solid var(--blue-light-2) !important;
    border-top: none !important;
    border-right: none !important;
    border-bottom: none !important;
}

.pros-card h4 {
    color: var(--blue-dark-1);
}

.pros-card i {
    color: var(--blue-medium-1);
}

.pros-card ul {
    color: var(--blue-dark-1);
}

.cons-card {
    background: linear-gradient(135deg, #e8eef3 0%, #d0dae3 100%);
    border-left: 4px solid var(--blue-medium-2) !important;
    border-top: none !important;
    border-right: none !important;
    border-bottom: none !important;
}

.cons-card h4 {
    color: var(--blue-dark-2);
}

.cons-card i {
    color: var(--blue-dark-1);
}

.cons-card ul {
    color: var(--blue-dark-2);
}

/* Table Header Blue */
.table-header-blue {
    background: linear-gradient(135deg, var(--blue-medium-1) 0%, var(--blue-medium-2) 100%);
    color: white;
}

.table-header-blue th {
    color: white;
}

/* Responsive Anpassungen */
@media screen and (max-width: 768px) {
    .method-icon {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
    }
}

@media screen and (max-width: 480px) {
    .method-icon {
        width: 45px;
        height: 45px;
        font-size: 1.3rem;
    }

    .equation-system {
        font-size: 1.1rem;
    }
}

/* ================================================
   Wahrscheinlichkeit - Grundlagen (grundlagen.php)
   Bootstrap-basierte Styles
   ================================================ */

/* Concept Icon Styles */
.concept-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: white;
    flex-shrink: 0;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.15);
}

.concept-icon-basics {
    background: linear-gradient(135deg, var(--blue-light-1) 0%, var(--blue-light-2) 100%);
}

.concept-icon-tree {
    background: linear-gradient(135deg, var(--blue-medium-1) 0%, var(--blue-medium-2) 100%);
}

.concept-icon-calc {
    background: linear-gradient(135deg, var(--blue-dark-1) 0%, var(--blue-dark-2) 100%);
}

/* Next Steps Box (Nächste Schritte) */
.next-steps-box {
    background: linear-gradient(135deg, var(--blue-light-bg) 0%, #d4e6f1 100%);
    border-left: 5px solid var(--blue-medium-1);
    border-radius: 8px;
    padding: 1.25rem;
    margin-top: 2rem;
}

.next-steps-box h4 {
    color: var(--blue-dark-1);
}

.next-steps-box i {
    color: var(--blue-medium-1);
}

.next-steps-box ul {
    color: var(--blue-dark-1);
}

/* Responsive Anpassungen für Wahrscheinlichkeit */
@media screen and (max-width: 768px) {
    .concept-icon {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
    }
}

@media screen and (max-width: 480px) {
    .concept-icon {
        width: 45px;
        height: 45px;
        font-size: 1.3rem;
    }
}

/* ================================================
   p,q-Formel Inline-Eingabe
   ================================================ */

/* Container für die Gleichung mit Inline-Inputs */
.pq-input-equation {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px;
    padding: 20px 10px;
    font-size: 1.3rem;
}

/* Gleichungs-Teile (MathJax) */
.equation-part {
    display: inline-flex;
    align-items: center;
}

/* Inline Eingabefelder in der Gleichung */
.inline-equation-input {
    display: inline-block;
    width: 80px;
    height: 50px;
    text-align: center;
    font-size: 1.4rem;
    font-weight: 600;
    border: 2px solid var(--blue-medium-1);
    border-radius: 8px;
    background-color: white;
    color: var(--blue-dark-1);
    transition: all 0.3s ease;
    padding: 8px;
}

.inline-equation-input:focus {
    outline: none;
    border-color: var(--blue-dark-1);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
    transform: scale(1.05);
}

.inline-equation-input:hover {
    border-color: var(--blue-dark-1);
}

/* Responsive Anpassungen für kleine Bildschirme */
@media screen and (max-width: 576px) {
    .pq-input-equation {
        font-size: 1.1rem;
    }
    
    .inline-equation-input {
        width: 70px;
        height: 45px;
        font-size: 1.2rem;
    }
}

/* Equation Display (Gleichungsanzeige) */
.equation-display {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--blue-dark-1);
    padding: 8px 12px;
    background-color: var(--blue-light-bg);
    border-radius: 6px;
    border: 1px solid var(--blue-light-1);
}

/* ================================================
   ERGÄNZTE KOMPONENTEN AUS MATHE10.CSS
   ================================================
   Die folgenden CSS-Komponenten wurden aus mathe10.css
   übernommen, um Feature-Parität zu gewährleisten.
   ================================================ */

/* ================================================
   Topic-Specific Hero-Elemente
   ================================================ */

/* Lotto-spezifische Hero-Elemente */
.lotto-element-1 {
    font-size: 5rem;
    top: 20px;
    left: 10%;
    transform: rotate(-10deg);
}

.lotto-element-2 {
    font-size: 2.5rem;
    bottom: 20px;
    right: 10%;
    transform: rotate(15deg);
}

.lotto-element-3 {
    font-size: 4rem;
    top: 40%;
    right: 15%;
    transform: rotate(5deg);
}

/* Exponentialfunktion-spezifische Hero-Elemente */
.exp-element-1 {
    font-size: 5rem;
    top: 20px;
    left: 10%;
    transform: rotate(-10deg);
}

.exp-element-2 {
    font-size: 2.5rem;
    bottom: 20px;
    right: 10%;
    transform: rotate(15deg);
}

.exp-element-3 {
    font-size: 4rem;
    top: 40%;
    right: 15%;
    transform: rotate(5deg);
}

/* ================================================
   Interaktive Übungen (aus mathe10.css)
   ================================================ */
.interactive-exercises-container {
    margin: 30px 0;
}

.interactive-exercises {
    background-color: var(--blue-light-bg);
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.exercise-selector {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
}

.exercise-btn {
    padding: 8px 15px;
    background-color: #e0e0e0;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s;
    font-family: inherit;
    font-size: 14px;
}

.exercise-btn:hover {
    background-color: #d0d0d0;
}

.exercise-btn.active {
    background-color: var(--blue-medium-1);
    color: white;
}

.exercise-content {
    background-color: white;
    border-radius: 8px;
    padding: 20px;
}

.exercise-item {
    display: none;
    background-color: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.exercise-item.active {
    display: block;
}

/* ================================================
   Content-Boxen (Ergänzungen)
   ================================================ */

/* Intro-Box mit grauem Hintergrund */
.intro-box {
    background-color: var(--mathe10-gray-light);
    border-left: 4px solid var(--blue-medium-1);
    padding: 20px;
    margin: 30px 0;
    border-radius: 0 8px 8px 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

/* Guide-Box für Anleitungen */
.guide-box {
    background-color: #fff;
    border: 1px solid var(--blue-light-2);
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

/* Step-Box für Schritt-für-Schritt-Erklärungen */
.step-box {
    background: linear-gradient(135deg, var(--blue-light-bg) 0%, #ffffff 100%);
    border-left: 4px solid var(--blue-medium-1);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.step-box:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
    transform: translateY(-2px);
}

.step-box h3,
.step-box h4,
.step-box h5 {
    color: var(--blue-dark-2);
    margin-top: 0;
}

/* Formel-Anzeige innerhalb von Step-Boxen */
.formula-display {
    background-color: #ffffff;
    padding: 15px;
    border-radius: 6px;
    margin: 10px 0;
    border: 1px solid var(--blue-light-2);
    text-align: center;
}

/* ================================================
   Schritte-Darstellung mit Nummern
   ================================================ */
.steps {
    counter-reset: step-counter;
    list-style-type: none;
    padding-left: 0;
}

.steps li {
    position: relative;
    padding-left: 40px;
    margin-bottom: 25px;
}

.steps li:before {
    content: counter(step-counter);
    counter-increment: step-counter;
    position: absolute;
    left: 0;
    top: 0;
    width: 30px;
    height: 30px;
    background-color: var(--blue-medium-1);
    color: white;
    border-radius: 50%;
    text-align: center;
    line-height: 30px;
    font-weight: bold;
}

.steps h4 {
    margin-top: 0;
    margin-bottom: 10px;
    color: #333;
}

/* ================================================
   Interaktive Vierfeldertafel
   ================================================ */
.interactive-table {
    margin: 20px auto;
}

.interactive-table .editable {
    cursor: pointer;
    background-color: #fff;
    transition: all 0.3s ease;
    font-weight: 600;
    color: var(--blue-medium-2);
}

.interactive-table .editable:hover {
    background-color: var(--blue-light-bg);
    transform: scale(1.05);
    box-shadow: 0 0 8px rgba(52, 152, 219, 0.3);
}

.interactive-table .editable:active {
    transform: scale(0.98);
}

/* Animation für Zellenhervorhebung */
@keyframes highlight-pulse {
    0%, 100% {
        background-color: var(--blue-light-bg);
        transform: scale(1);
    }
    50% {
        background-color: var(--blue-medium-bg);
        transform: scale(1.08);
    }
}

.highlight-animation {
    animation: highlight-pulse 1.5s ease-in-out;
}

/* ================================================
   Parameter-Grids und Cards
   ================================================ */
.parameter-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin: 20px 0;
}

@media (max-width: 768px) {
    .parameter-grid {
        grid-template-columns: 1fr;
    }
}

.parameter-card {
    background-color: #fff;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.parameter-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.parameter-card h3 {
    color: var(--blue-medium-1);
    margin-top: 0;
    border-bottom: 2px solid var(--blue-light-2);
    padding-bottom: 10px;
    margin-bottom: 15px;
}

/* ================================================
   Parameter-Eingaben (erweitert)
   ================================================ */
.parameter-inputs {
    background-color: #f9f9f9;
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
    box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.05);
}

.parameter-inputs h4 {
    margin-top: 0;
}

/* ================================================
   Daten-Tabellen
   ================================================ */
.data-table-container {
    overflow-x: auto;
    margin: 20px 0;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-family: inherit;
}

.data-table th {
    background-color: var(--blue-medium-1);
    color: white;
    padding: 10px;
    text-align: left;
    font-weight: 500;
}

.data-table td {
    padding: 8px 10px;
    border-bottom: 1px solid var(--blue-light-2);
}

.data-table tr:nth-child(even) {
    background-color: var(--blue-light-bg);
}

.data-table tr:hover {
    background-color: #e8f4f8;
}

/* ================================================
   Anwendungskarten (Application Cards)
   ================================================ */
.applications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

@media (max-width: 768px) {
    .applications-grid {
        grid-template-columns: 1fr;
    }
}

.application-card {
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
}

.application-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
}

.application-card h3 {
    margin: 0;
    padding: 15px 20px;
    background-color: var(--blue-medium-1);
    color: white;
    font-size: 18px;
}

.application-content {
    padding: 20px;
}

.application-content ul {
    padding-left: 20px;
}

.application-content p:last-child {
    margin-bottom: 0;
}

/* ================================================
   Check und Reset Buttons (erweitert)
   ================================================ */
.check-btn,
.reset-btn {
    flex: 1;
    padding: 8px 20px;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s;
    text-align: center;
    min-width: 120px;
    font-family: inherit;
}

.check-btn {
    background-color: var(--blue-medium-1);
}

.check-btn:hover {
    background-color: var(--blue-medium-2);
}

.reset-btn {
    background-color: var(--blue-light-1);
}

.reset-btn:hover {
    background-color: var(--blue-light-2);
}

/* ================================================
   Prisma-spezifische Styles
   ================================================ */
#prisma-canvas,
#prisma-decomposition-canvas {
    border: 1px solid #ccc;
    background-color: #f9f9f9;
    max-width: 100%;
    display: block;
    margin: 0 auto;
}

.blank-line {
    display: inline-block;
    min-width: 120px;
    border-bottom: 2px solid var(--blue-medium-1);
    margin: 0 5px;
    vertical-align: baseline;
}

.blank-solution {
    display: none;
    color: var(--blue-dark-1);
    font-weight: bold;
}

.blank-solution.show {
    display: inline-block;
}

.controls button {
    margin: 5px;
}

.prisma-inputs {
    display: block;
}

/* ================================================
   Utility Classes
   ================================================ */
.text-primary {
    color: var(--blue-medium-1) !important;
}

.bg-primary {
    background-color: var(--blue-medium-1) !important;

/* ================================================
   Responsive MathJax Formeln (ÜBERARBEITET)
   ================================================ */

/* Basis-Skalierung mit clamp() für automatische Anpassung */
mjx-container {
    font-size: clamp(0.85rem, 2vw, 1.1rem) !important;
    max-width: 100%;
}

/* Inline-Formeln */
mjx-container[display="inline"] {
    font-size: clamp(0.85rem, 1.8vw, 1rem) !important;
}

/* Display-Formeln (zentriert) */
mjx-container[display="block"] {
    font-size: clamp(0.9rem, 2.2vw, 1.15rem) !important;
    margin: 1rem 0;
}

/* Tablet (768px und kleiner) */
@media (max-width: 768px) {
    mjx-container {
        font-size: 0.9rem !important;
    }
    
    mjx-container[display="inline"] {
        font-size: 0.88rem !important;
    }
    
    mjx-container[display="block"] {
        font-size: 0.95rem !important;
    }
}

/* Mobile (480px und kleiner) */
@media (max-width: 480px) {
    mjx-container {
        font-size: 0.85rem !important;
    }
    
    mjx-container[display="inline"] {
        font-size: 0.82rem !important;
    }
    
    mjx-container[display="block"] {
        font-size: 0.88rem !important;
        margin: 0.75rem 0;
    }
}

/* Nur bei wirklich breiten Formeln Scrollbar anzeigen */
mjx-container[style*="width"] {
    overflow-x: auto;
    overflow-y: hidden;
}

/* Touch-Scrolling für mobile Geräte */
@media (pointer: coarse) {
    mjx-container[style*="width"] {
        -webkit-overflow-scrolling: touch;
    }
}

/* Formeln in Boxen (formula-box, example-box, etc.) */
.formula-box mjx-container,
.example-box mjx-container,
.solution-box mjx-container,
.hint-box mjx-container {
    word-wrap: break-word;
    overflow-wrap: break-word;
}