/* ================================================
   Mathematik Leistungskurs 11 - Vollständiges CSS
   ================================================

   Basiert auf mathe10.css - Identisches Farbschema

   Einheitliches Farbschema basierend auf Blautönen:
   - Primary: #4285f4 (Google Blue)
   - Secondary: #2471a3
   - Success: #4caf50 (Grün)
   - Error: #f44336 (Rot)
   - Warning: #fdd835 (Gelb)

   Bootstrap 5 wird verwendet für Grid und Utilities.
   ================================================ */

/* ================================================
   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 */
    --mathelk11-primary: #3498db;
    --mathelk11-secondary: #2980b9;
    --mathelk11-accent: #1e3c72;

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

    /* Button-Farben (Blautöne) */
    --mathelk11-success: #3498db;
    --mathelk11-success-dark: #2980b9;
    --mathelk11-success-bg: #d4e6f1;
    --mathelk11-error: #5dade2;
    --mathelk11-error-dark: #3498db;
    --mathelk11-error-bg: #ebf5fb;
    --mathelk11-warning: #85c1e9;
    --mathelk11-warning-dark: #5dade2;
    --mathelk11-warning-bg: #ebf5fb;

    /* Grautöne */
    --mathelk11-gray-light: #f5f5f5;
    --mathelk11-gray-medium: #e0e0e0;
    --mathelk11-gray-dark: #7f8c8d;
}

/* ================================================
   MathJax Schriftart-Override
   ================================================
   Setzt explizit die MathJax-Schriften und verhindert
   dass Poppins die Formeln überschreibt.
   ================================================ */

/* Hauptcontainer: Verwendet MathJax CHTML Schriften */
mjx-container {
    font-family: MJXZERO, MJXTEX-I, MJXTEX, MJXTEX-C, MJXTEX-S2, MJXTEX-S3, MJXTEX-S4, MJXTEX-A, MJXTEX-B, MJXTEX-S1, serif !important;
}

/* Verhindert, dass Kindelemente Poppins erben */
mjx-container * {
    font-family: inherit;
}

/* ================================================
   Hero-Bereich Background-Elemente
   ================================================ */
/* Hero-Elemente für mathematiklk11.php Übersichtsseite */
.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%;
    right: 20%;
    transform: rotate(5deg);
    opacity: 0.1;
    color: var(--blue-dark-1);
    pointer-events: none;
    z-index: 1;
}

/* Background-Elemente für Unterseiten */
.bg-element {
    opacity: 0.1;
    position: absolute;
    font-family: 'Cambria Math', serif;
    color: var(--blue-dark-1);
    pointer-events: none;
    z-index: 1;
}

/* Math-Elemente (für Analysis-Seiten) */
.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);
}

/* Lotto-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-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);
}

/* ================================================
   Text-Element Styling
   ================================================ */
strong {
    color: #1e3c72;
    font-weight: 600;
}

code {
    color: #2980b9 !important;
    background-color: #ebf5fb;
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-size: 90%;
    word-wrap: break-word;
}

/* ================================================
   Bootstrap Background Color Overrides
   ================================================ */
.bg-success {
    background-color: #d4e6f1 !important;
    color: #2980b9 !important;
}

.bg-danger {
    background-color: #aed6f1 !important;
    color: #1e3c72 !important;
}

/* Alert-Varianten in Blautönen */
.alert-success {
    background-color: #d4e6f1 !important;
    border-color: #85c1e9 !important;
    color: #2980b9 !important;
}

.alert-danger {
    background-color: #aed6f1 !important;
    border-color: #5dade2 !important;
    color: #1e3c72 !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;
}

/* ================================================
   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;
}

/* ================================================
   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);
}

/* ================================================
   Badge Stile - Drei Schwierigkeitsstufen
   ================================================ */
.badge-easy {
    background-color: var(--blue-light-2) !important;
    color: white !important;
    padding: 0.25rem 0.75rem;
    border-radius: 0.25rem;
    font-size: 0.875rem;
}

.badge-medium {
    background-color: var(--blue-medium-1) !important;
    color: white !important;
    padding: 0.25rem 0.75rem;
    border-radius: 0.25rem;
    font-size: 0.875rem;
}

.badge-hard {
    background-color: var(--blue-dark-1) !important;
    color: white !important;
    padding: 0.25rem 0.75rem;
    border-radius: 0.25rem;
    font-size: 0.875rem;
}

/* ================================================
   Content-Boxen
   ================================================ */
.intro-box {
    background-color: var(--mathelk11-gray-light);
    border-left: 4px solid var(--mathelk11-primary);
    padding: 20px;
    margin: 30px 0;
    border-radius: 0 8px 8px 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.guide-box {
    background-color: #fff;
    border: 1px solid var(--mathelk11-gray-medium);
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

/* Info-Box für wichtige Informationen */
.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);
}

.info-box h2,
.info-box h4 {
    color: var(--blue-medium-2);
    margin-top: 0;
    margin-bottom: 15px;
}

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

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

.example-box {
    background-color: var(--mathelk11-primary-bg);
    border: 1px solid var(--mathelk11-primary-light);
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
}

/* Übungsbox mit hellblauem Hintergrund */
.exercise-box {
    background: linear-gradient(135deg, var(--blue-light-bg) 0%, #f0f8fc 100%);
    border-left: 4px solid var(--blue-medium-1);
    border-radius: 8px;
    padding: 25px;
    margin: 20px 0;
    box-shadow: 0 2px 8px rgba(52, 152, 219, 0.1);
}

.exercise-box h3 {
    color: var(--blue-dark-1);
    margin-bottom: 1rem;
}

.exercise-box .fas {
    color: var(--blue-medium-1);
}

/* Lösungsbox mit mittelblauem Hintergrund */
.solution-box {
    background: linear-gradient(135deg, var(--blue-medium-bg) 0%, #d0e7f5 100%);
    border-left: 4px solid var(--blue-dark-1);
    border-radius: 8px;
    padding: 20px;
    margin-top: 15px;
    box-shadow: 0 2px 6px rgba(30, 60, 114, 0.15);
}

.solution-box h4 {
    color: var(--blue-dark-1);
    margin-bottom: 0.75rem;
    font-weight: 600;
}

.solution-box ul {
    margin-bottom: 1rem;
}

.solution-box ul li {
    margin-bottom: 0.5rem;
}

/* Button für Lösungen */
.show-solution-btn {
    margin-top: 1rem;
}

.show-solution-btn .fas {
    transition: transform 0.3s ease;
}

.show-solution-btn:hover .fas {
    transform: scale(1.1);
}

.solution-steps {
    background-color: #fff;
    padding: 15px;
    border-radius: 8px;
    border-left: 3px solid var(--mathelk11-primary);
    margin-top: 15px;
}

.solution-steps h4 {
    margin-top: 0;
    color: var(--mathelk11-primary);
}

.hint-box {
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    border-left: 5px solid var(--blue-medium-1);
    padding: 25px;
    margin: 20px 0;
    border-radius: 0 12px 12px 0;
    color: #0d47a1;
    box-shadow: 0 3px 12px rgba(52, 152, 219, 0.2);
}

.hint-box h3,
.hint-box h4,
.hint-box h5,
.hint-box h6 {
    margin-top: 0;
    margin-bottom: 1rem;
    color: var(--blue-dark-1);
    font-weight: 700;
}

.hint-box strong {
    color: var(--blue-dark-2);
    font-weight: 700;
}

.hint-box p {
    color: #1565c0;
    margin-bottom: 0.75rem;
}

.hint-box ul,
.hint-box ol {
    margin-bottom: 0.5rem;
    color: #1565c0;
}

.hint-box ul li,
.hint-box ol li {
    margin-bottom: 0.5rem;
}

/* Code-Elemente in hint-box */
.hint-box code {
    background-color: #ffffff !important;
    color: var(--blue-dark-2) !important;
    padding: 0.3rem 0.6rem !important;
    border-radius: 6px;
    border: 1px solid var(--blue-medium-bg);
    font-weight: 600;
    font-size: 95%;
}

/* Weiße Boxen innerhalb von hint-box */
.hint-box .bg-white {
    background-color: #ffffff !important;
    padding: 1.25rem;
    border-radius: 10px;
    border: 2px solid var(--blue-medium-bg);
    color: #212529;
    box-shadow: 0 2px 8px rgba(52, 152, 219, 0.1);
}

.hint-box .bg-white p {
    color: #212529;
}

.hint-box .bg-white code {
    color: var(--blue-medium-2) !important;
}

.hint-box .bg-white .small,
.hint-box .bg-white small {
    color: #6c757d;
}

.hint-box .bg-white .text-muted {
    color: #6c757d !important;
}

/* MathJax-Formeln in hint-box */
.hint-box mjx-container,
.hint-box mjx-container * {
    color: var(--blue-dark-1) !important;
}

.hint-box .formula {
    background-color: #ffffff;
    padding: 15px;
    border-radius: 8px;
    border: 1px solid var(--blue-medium-bg);
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.05);
}

/* ================================================
   Schritte-Darstellung
   ================================================ */
.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(--mathelk11-primary);
    color: white;
    border-radius: 50%;
    text-align: center;
    line-height: 30px;
    font-weight: bold;
}

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

/* ================================================
   GeoGebra Container (allgemeingültig)
   ================================================ */

/* Basis-Styling für GeoGebra Container - nutzt Bootstrap .ratio */
.geogebra-wrapper {
    background-color: #f5f5f5;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* Für direkte Integration mit absolut positionierten Elementen (Buttons) */
.geogebra-wrapper.with-controls {
    position: relative;
}

/* Stelle sicher, dass iframe den Container vollständig ausfüllt */
.geogebra-wrapper .ratio iframe {
    border-radius: 8px;
    width: 100% !important;
    height: 100% !important;
    display: block;
}

/* ================================================
   Interaktive Übungen
   ================================================ */
.interactive-exercises-container {
    margin: 30px 0;
}

.interactive-exercises {
    background-color: var(--mathelk11-gray-light);
    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: var(--mathelk11-gray-medium);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s;
    font-family: inherit;
}

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

.exercise-btn.active {
    background-color: var(--mathelk11-primary);
    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;
}

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

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

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

/* ================================================
   Buttons
   ================================================ */
.button-group {
    display: flex;
    gap: 10px;
    margin-top: 15px;
}

/* Gemeinsame Button-Basis */
.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-Button (Grün) */
.check-btn {
    background-color: var(--mathelk11-success);
}

.check-btn:hover {
    background-color: var(--mathelk11-success-dark);
}

/* Reset-Button (Rot) */
.reset-btn {
    background-color: var(--mathelk11-error);
}

.reset-btn:hover {
    background-color: var(--mathelk11-error-dark);
}

/* ================================================
   Feedback-Boxen
   ================================================ */
.feedback {
    margin-top: 15px;
    padding: 10px;
    border-radius: 4px;
    display: none;
}

.feedback.success {
    display: block;
    background-color: var(--mathelk11-success-bg);
    border: 1px solid #a5d6a7;
    color: #2e7d32;
}

.feedback.error {
    display: block;
    background-color: var(--mathelk11-error-bg);
    border: 1px solid #ffcdd2;
    color: #c62828;
}

.feedback.warning {
    display: block;
    background-color: var(--mathelk11-warning-bg);
    border: 1px solid #fff59d;
    color: var(--mathelk11-warning-dark);
}

.feedback.correct {
    display: block;
    background-color: var(--mathelk11-success-bg);
    border: 1px solid #a5d6a7;
    color: #2e7d32;
}

.feedback.incorrect {
    display: block;
    background-color: var(--mathelk11-error-bg);
    border: 1px solid #ffcdd2;
    color: #c62828;
}

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

.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(--mathelk11-primary);
    margin-top: 0;
    border-bottom: 2px solid var(--mathelk11-gray-medium);
    padding-bottom: 10px;
    margin-bottom: 15px;
}

/* ================================================
   Parameter-Eingaben
   ================================================ */
.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;
}

.input-group {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

.input-group label {
    width: 50px;
    font-weight: bold;
    font-family: monospace;
    font-size: 18px;
}

.input-group input {
    flex-grow: 1;
    padding: 8px 12px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 16px;
    min-width: 300px;
    max-width: 350px;
}

.input-group input::placeholder {
    opacity: 1;
    color: #666;
}

.input-group input:focus {
    border-color: var(--mathelk11-primary);
    outline: none;
    box-shadow: 0 0 0 2px rgba(66, 133, 244, 0.2);
}

/* ================================================
   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(--mathelk11-primary);
    color: white;
    padding: 10px;
    text-align: left;
    font-weight: 500;
}

.data-table td {
    padding: 8px 10px;
    border-bottom: 1px solid var(--mathelk11-gray-medium);
}

.data-table tr:nth-child(even) {
    background-color: var(--mathelk11-gray-light);
}

.data-table tr:hover {
    background-color: #e8f0fe;
}

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

.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(--mathelk11-primary);
    color: white;
    font-size: 18px;
}

.application-content {
    padding: 20px;
}

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

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

/* ================================================
   Mathematik-spezifische Formeln
   ================================================ */
.formula {
    font-family: 'MJXZERO', 'MJXTEX', 'Latin Modern Math', serif;
    font-style: italic;
}

/* ================================================
   Bootstrap Tabs Styling
   ================================================ */
.nav-tabs {
    border-bottom: 2px solid #d4e6f1;
    margin-bottom: 1.5rem;
}

/* Inaktive Tabs - dunkle Schrift auf hellem Hintergrund */
.nav-tabs .nav-link {
    background-color: #f8f9fa;
    border: 2px solid #aed6f1;
    border-bottom: none;
    color: #1e3c72 !important;
    font-weight: 600;
    padding: 0.75rem 1.25rem;
    margin-right: 0.25rem;
    border-radius: 8px 8px 0 0;
    transition: all 0.3s ease;
}

/* Hover-Zustand - deutlich sichtbar */
.nav-tabs .nav-link:hover {
    background-color: #d4e6f1;
    border-color: #3498db;
    color: #154360 !important;
    transform: translateY(-2px);
}

/* Aktiver Tab - weißer Text auf blauem Hintergrund */
.nav-tabs .nav-link.active {
    background: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
    border-color: #3498db;
    color: #ffffff !important;
    box-shadow: 0 -2px 8px rgba(52, 152, 219, 0.3);
}

/* Icon-Farben in Tabs */
.nav-tabs .nav-link i {
    margin-right: 0.5rem;
    color: inherit;
}

/* Tab Content */
.tab-content {
    padding: 1.5rem 0;
}

/* ================================================
   Responsive Design
   ================================================ */

/* Tablet und kleiner (768px) */
@media (max-width: 768px) {
    /* Hero-Elemente kleiner auf Tablet */
    .hero-element-1,
    .hero-element-2,
    .hero-element-3,
    .bg-element,
    .bg-element.math-element-1,
    .bg-element.math-element-2,
    .bg-element.math-element-3 {
        font-size: 2rem !important;
        opacity: 0.07;
    }

    /* GeoGebra nutzt Bootstrap .ratio - keine extra Regeln nötig */

    .parameter-grid {
        grid-template-columns: 1fr;
    }

    .applications-grid {
        grid-template-columns: 1fr;
    }

    .input-group {
        flex-direction: column;
        align-items: flex-start;
    }

    .input-group label {
        margin-bottom: 5px;
    }

    .input-group input {
        width: 100%;
        max-width: none;
    }
}

/* Mobile (767px und kleiner) */
@media (max-width: 767px) {
    /* Container-Anpassungen */
    .container {
        width: 100%;
        padding: 10px;
        box-sizing: border-box;
    }

    .section {
        padding: 10px;
    }

    /* Content-Boxen */
    .intro-box,
    .guide-box,
    .example-box,
    .hint-box {
        padding: 15px;
        margin: 15px 0;
    }

    .parameter-inputs {
        padding: 15px;
    }

    /* Schritte */
    .steps li {
        padding-left: 35px;
        margin-bottom: 20px;
    }

    .steps li:before {
        width: 26px;
        height: 26px;
        line-height: 26px;
        font-size: 14px;
    }

    /* Übungen */
    .interactive-exercises {
        padding: 15px;
        margin: 15px 0;
    }

    .exercise-item {
        padding: 15px;
    }

    .exercise-selector {
        flex-wrap: wrap;
        justify-content: center;
        gap: 5px;
    }

    .exercise-btn {
        padding: 8px 10px;
        margin: 0 2px 5px 0;
        font-size: 14px;
    }

    /* Button-Gruppe vertikal auf Mobile */
    .button-group {
        flex-direction: column;
        gap: 10px;
    }

    .check-btn,
    .reset-btn {
        min-height: 44px;
        padding: 10px;
        width: 100%;
        display: flex;
        justify-content: center;
        align-items: center;
        font-size: 16px;
    }

    /* GeoGebra nutzt Bootstrap .ratio - responsive von Haus aus */

    /* Tabellen */
    .data-table {
        font-size: 14px;
    }

    .data-table th {
        padding: 8px 5px;
    }

    .data-table td {
        padding: 6px 5px;
    }

    /* Feedback */
    .feedback {
        margin-top: 15px;
        padding: 12px;
        font-size: 14px;
    }

    /* Anwendungskarten */
    .applications-grid {
        gap: 15px;
        margin: 15px 0;
    }

    .application-card h3 {
        font-size: 16px;
        padding: 12px 15px;
    }

    .application-content {
        padding: 15px;
    }

    .application-content ul {
        padding-left: 15px;
    }

    /* Input-Gruppen */
    .input-group input {
        font-size: 16px;
        padding: 10px;
        margin-bottom: 5px;
    }
}

/* Sehr kleine Bildschirme (480px und kleiner) */
@media (max-width: 480px) {
    /* Hero-Elemente auf Smartphones ausblenden */
    .hero-element-1,
    .hero-element-2,
    .hero-element-3,
    .bg-element,
    .bg-element.math-element-1,
    .bg-element.math-element-2,
    .bg-element.math-element-3,
    .lotto-element-1,
    .lotto-element-2,
    .lotto-element-3,
    .exp-element-1,
    .exp-element-2,
    .exp-element-3 {
        display: none;
    }

    .interactive-exercises {
        padding: 10px;
        margin: 10px 0;
    }

    .exercise-item {
        padding: 10px;
    }

    .exercise-btn {
        font-size: 13px;
        padding: 6px 8px;
    }

    .data-table {
        font-size: 12px;
    }

    .data-table th,
    .data-table td {
        padding: 5px 3px;
    }

    /* GeoGebra nutzt Bootstrap .ratio mit angepassten CSS-Variablen */

    .feedback {
        font-size: 13px;
        padding: 10px;
    }

    h2 {
        font-size: 20px;
    }

    h3 {
        font-size: 18px;
    }
}

/* Touch-Geräte Optimierung */
@media (pointer: coarse) {
    /* Größere Touch-Targets */
    .exercise-btn {
        padding: 10px 15px;
        margin-bottom: 5px;
    }

    .check-btn,
    .reset-btn {
        min-height: 44px;
    }

    /* Verhindert Zoom auf iOS bei Eingaben */
    input[type="text"],
    input[type="number"] {
        font-size: 16px;
        padding: 10px;
    }

    /* Mehr Abstand für Touch-Bedienung */
    .exercise-item {
        padding: 15px 10px;
    }

    .parameter-inputs p {
        font-size: 16px;
    }
}

/* ================================================
   Utility-Klassen (Bootstrap-kompatibel)
   ================================================ */
.text-primary {
    color: var(--mathelk11-primary) !important;
}

.bg-primary {
    background-color: var(--mathelk11-primary) !important;
}

.border-primary {
    border-color: var(--mathelk11-primary) !important;
}

/* ================================================
   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;
}

/* 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;
}

/* ================================================
   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;

/* ================================================
   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;
}

/* ================================================
   Tool-Karte Styles (für Rechner, etc.)
   ================================================ */
.tool-card {
    border: 2px solid var(--blue-medium-1);
    transition: all 0.3s ease;
    overflow: hidden;
    position: relative;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(52, 152, 219, 0.1), transparent);
    transition: left 0.5s ease;
}

.tool-card:hover::before {
    left: 100%;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(52, 152, 219, 0.3);
    border-color: var(--blue-medium-2);
}

.card-header-tool {
    background: linear-gradient(135deg, var(--blue-medium-1) 0%, var(--blue-medium-2) 100%) !important;
    font-weight: 600;
}

.badge-tool {
    background: linear-gradient(135deg, var(--blue-medium-1) 0%, var(--blue-medium-2) 100%);
    color: white;
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-weight: 600;
    box-shadow: 0 2px 5px rgba(52, 152, 219, 0.3);
}

.btn-mathe-tool {
    background: linear-gradient(135deg, var(--blue-medium-1) 0%, var(--blue-medium-2) 100%);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 10px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.2);
}

.btn-mathe-tool:hover {
    background: linear-gradient(135deg, var(--blue-medium-2) 0%, var(--blue-dark-1) 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(52, 152, 219, 0.4);
    color: white;
}

.btn-mathe-tool:active {
    transform: translateY(0);
}

/* ================================================
   Polynomdivision Rechner Styles
   ================================================ */

/* Calculator Box */
.calculator-box {
    background: linear-gradient(135deg, #ebf5fb 0%, #d4e6f1 50%, #ffffff 100%);
    border: 3px solid var(--blue-medium-1);
    border-radius: 20px;
    padding: 2.5rem;
    box-shadow: 0 8px 25px rgba(52, 152, 219, 0.2);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.calculator-box::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(52, 152, 219, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.calculator-box:hover {
    box-shadow: 0 12px 35px rgba(52, 152, 219, 0.3);
    transform: translateY(-2px);
}

.calculator-box h3 {
    color: var(--blue-dark-1);
    margin-bottom: 1.5rem;
}

.input-section {
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    border: 1px solid var(--blue-medium-bg);
}

.input-section h5 {
    color: var(--blue-medium-2);
    margin-bottom: 0.5rem;
}

/* Input Section Improvements */
.input-section {
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    padding: 1.8rem;
    border-radius: 15px;
    border: 2px solid var(--blue-medium-bg);
    transition: all 0.3s ease;
}

.input-section:hover {
    border-color: var(--blue-medium-1);
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.15);
}

.input-section h5 {
    color: var(--blue-medium-2);
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.input-section .form-control {
    border: 2px solid var(--blue-medium-bg);
    border-radius: 8px;
    transition: all 0.3s ease;
    font-weight: 500;
}

.input-section .form-control:focus {
    border-color: var(--blue-medium-1);
    box-shadow: 0 0 0 0.2rem rgba(52, 152, 219, 0.25);
}

/* Result Box */
.result-box {
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    border: 3px solid var(--blue-medium-1);
    border-radius: 20px;
    padding: 2.5rem;
    margin-top: 2rem;
    box-shadow: 0 10px 30px rgba(52, 152, 219, 0.25);
    animation: fadeInUp 0.5s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.result-box h3 {
    color: var(--blue-dark-1);
    margin-bottom: 1.5rem;
    font-weight: 700;
}

/* Division Container - Visuelle Darstellung */
.division-container {
    background: linear-gradient(to bottom, #f8f9fa 0%, #ffffff 100%);
    border: 2px solid var(--blue-medium-bg);
    border-radius: 10px;
    padding: 2rem;
    margin: 1.5rem 0;
    overflow-x: auto;
}

.poly-division {
    min-width: 400px;
}

/* Header: (Dividend) : (Divisor) = Quotient */
.division-header {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: linear-gradient(135deg, var(--blue-light-bg) 0%, #ffffff 100%);
    border-radius: 10px;
    border-left: 4px solid var(--blue-medium-1);
    text-align: center;
}

.division-equation {
    font-size: 1.2rem;
}

/* SVG-basierte schriftliche Division */
.division-svg-container {
    margin-top: 2rem;
    padding: 2.5rem;
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    border-radius: 15px;
    border: 2px solid var(--blue-medium-bg);
    overflow-x: auto;
    display: flex;
    justify-content: center;
    box-shadow: inset 0 2px 10px rgba(52, 152, 219, 0.1);
    transition: all 0.3s ease;
}

.division-svg-container:hover {
    box-shadow: inset 0 4px 15px rgba(52, 152, 219, 0.15);
}

.division-svg {
    max-width: 100%;
    height: auto;
    filter: drop-shadow(0 2px 4px rgba(52, 152, 219, 0.1));
}

.work-row {
    display: flex;
    align-items: center;
    min-height: 2.5rem;
    padding: 0.3rem 0;
}

.work-row.subtract {
    color: var(--blue-medium-2);
}

.work-row.result {
    font-weight: 600;
    color: var(--blue-dark-2);
    padding-top: 0.5rem;
}

/* Spalten für Terme */
.term-col {
    display: inline-block;
    text-align: center;
    min-width: 140px;
    padding: 0 0.5rem;
}

.term-col.col-0 {
    min-width: 140px; /* x³ */
}

.term-col.col-1 {
    min-width: 140px; /* x² */
}

.term-col.col-2 {
    min-width: 120px; /* x */
}

.term-col.col-3 {
    min-width: 100px; /* Konstante */
}

/* Horizontale Linie */
.work-line {
    height: 2px;
    background: var(--blue-dark-1);
    margin: 0.4rem 0;
    max-width: 600px;
}

/* Abstand zwischen Schritten */
.work-spacer {
    height: 1.5rem;
}

/* Responsive Anpassungen */
@media (max-width: 992px) {
    .term-col {
        min-width: 120px;
        padding: 0 0.4rem;
    }

    .term-col.col-0, .term-col.col-1 {
        min-width: 120px;
    }

    .term-col.col-2 {
        min-width: 100px;
    }

    .term-col.col-3 {
        min-width: 80px;
    }
}

@media (max-width: 768px) {
    .term-col {
        min-width: 100px;
        padding: 0 0.3rem;
    }

    .term-col.col-0, .term-col.col-1 {
        min-width: 100px;
    }

    .term-col.col-2 {
        min-width: 85px;
    }

    .term-col.col-3 {
        min-width: 70px;
    }

    .division-work-area {
        padding: 1rem;
    }
}

@media (max-width: 576px) {
    .term-col {
        min-width: 80px;
        font-size: 0.9rem;
    }

    .work-row {
        min-height: 2rem;
    }
}

/* Result Summary */
.division-result-summary {
    margin-top: 2rem;
}

.division-final {
    padding: 1.25rem;
    border-radius: 10px;
    font-size: 1.05rem;
    display: flex;
    align-items: center;
}

.division-final.with-rest {
    background: linear-gradient(135deg, #d1ecf1 0%, #bee5eb 100%);
    border: 2px solid #17a2b8;
    border-left-width: 5px;
    color: #0c5460;
}

.division-final.no-rest {
    background: linear-gradient(135deg, #d4edda 0%, #c3e6cb 100%);
    border: 2px solid #28a745;
    border-left-width: 5px;
    color: #155724;
}

/* Result Cards */
.result-card {
    background: linear-gradient(135deg, #ebf5fb 0%, #ffffff 100%);
    border: 2px solid var(--blue-medium-1);
    border-radius: 15px;
    padding: 1.8rem;
    height: 100%;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.15);
}

.result-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(52, 152, 219, 0.25);
    border-color: var(--blue-medium-2);
}

.result-card h5 {
    color: var(--blue-dark-1);
    margin-bottom: 1rem;
    font-weight: 700;
}

.result-card.asymptote-card {
    background: linear-gradient(135deg, #fff8e1 0%, #ffffff 100%);
    border-color: #ffa726;
    box-shadow: 0 4px 15px rgba(255, 167, 38, 0.2);
}

.result-card.asymptote-card:hover {
    box-shadow: 0 8px 25px rgba(255, 167, 38, 0.3);
}

.result-card.asymptote-card h5 {
    color: #e65100;
}

.formula-result {
    font-size: 1.15rem;
    padding: 1.2rem;
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    border-radius: 10px;
    text-align: center;
    border: 1px solid var(--blue-medium-bg);
    box-shadow: inset 0 2px 5px rgba(52, 152, 219, 0.05);
}

/* Example Section */
.example-section {
    background: linear-gradient(135deg, #f0f8ff 0%, #e8f4f8 100%);
    padding: 2.5rem;
    border-radius: 20px;
    border: 2px solid var(--blue-medium-bg);
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.1);
}

.example-section h3 {
    color: var(--blue-dark-1);
    margin-bottom: 1.5rem;
    font-weight: 700;
}

.example-card {
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    border: 2px solid var(--blue-light-2);
    border-radius: 15px;
    padding: 1.5rem;
    transition: all 0.3s ease;
    height: 100%;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.example-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(52, 152, 219, 0.1), transparent);
    transition: left 0.5s ease;
}

.example-card:hover::before {
    left: 100%;
}

.example-card:hover {
    border-color: var(--blue-medium-1);
    box-shadow: 0 8px 25px rgba(52, 152, 219, 0.3);
    transform: translateY(-4px) scale(1.02);
}

.example-card h6 {
    color: var(--blue-dark-1);
    margin-bottom: 0.75rem;
    font-weight: 700;
}

.example-card p {
    color: var(--mathelk11-gray-dark);
    margin-bottom: 1rem;
    font-weight: 500;
}

.load-example-btn {
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(52, 152, 219, 0.2);
}

.load-example-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
}

/* Alerts with improved styling */
.alert {
    border-radius: 15px;
    border-left-width: 5px;
    padding: 1.25rem 1.5rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    animation: slideIn 0.4s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.alert-success {
    background: linear-gradient(135deg, #d4edda 0%, #c3e6cb 100%);
    border-left-color: #28a745;
    color: #155724;
}

.alert-info {
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    border-left-color: #2196f3;
    color: #0d47a1;
}

.alert-warning {
    background: linear-gradient(135deg, #fff3cd 0%, #ffeaa7 100%);
    border-left-color: #ff9800;
    color: #8a6d3b;
}

/* Calculate Button Enhancement */
#calculate-btn {
    background: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
    border: none;
    box-shadow: 0 6px 20px rgba(52, 152, 219, 0.3);
    transition: all 0.3s ease;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    position: relative;
    overflow: hidden;
}

#calculate-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

#calculate-btn:hover::before {
    width: 300px;
    height: 300px;
}

#calculate-btn:hover {
    background: linear-gradient(135deg, #2980b9 0%, #2471a3 100%);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(52, 152, 219, 0.4);
}

#calculate-btn:active {
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
}

/* Responsive Anpassungen */
@media (max-width: 768px) {
    .division-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .division-quotient {
        text-align: left;
    }

    .calculator-box,
    .result-box {
        padding: 1.25rem;
    }

    .division-container {
        padding: 1rem;
    }
}