/* ===== PAGES.CSS - Page-Specific Styles ===== */
/* Uses CSS custom properties from main.css */

/* Page Wrapper */
.page-wrapper {
    max-width: 1200px;
    margin: 0 auto;
}

/* ===== GRADE OVERVIEW PAGES ===== */

/* Hero Section (used in grade overview pages) */
.grade-hero {
    text-align: center;
    padding: var(--space-xxl);
    background: linear-gradient(135deg, var(--color-primary-gradient-start), var(--color-primary-gradient-end));
    border-radius: var(--border-radius-lg);
    color: white;
    margin-bottom: var(--space-xxl);
}

.phase-badge,
.grade-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.3);
    color: white;
    padding: 6px 16px;
    border-radius: 20px;
    font-weight: 600;
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-md);
}

.hero-title {
    font-size: 2.5em;
    margin-bottom: var(--space-sm);
    color: white;
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    opacity: 0.95;
    color: white;
}

/* Intro Box */
.intro-box {
    background: var(--color-card-bg);
    padding: var(--space-xl);
    border-radius: var(--border-radius-lg);
    border-left: 5px solid var(--color-primary);
    margin-bottom: var(--space-xxl);
    line-height: 1.8;
}

/* Subject Sections */
.subject-section {
    margin: var(--space-xxl) 0;
}

.section-header {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.section-icon {
    font-size: 3em;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent-green));
    color: white;
    border-radius: var(--border-radius-lg);
    flex-shrink: 0;
}

.section-title-group h2 {
    font-size: var(--font-size-xxl);
    color: var(--color-primary);
    margin-bottom: var(--space-sm);
}

.section-description {
    color: var(--color-text-muted);
    font-size: var(--font-size-lg);
}

/* Topic Grid */
.topics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--space-lg);
}

/* Topic Cards */
.topic-card,
.topic-card-klasse9,
.topic-card-klasse10,
.topic-card-klasse11 {
    background: var(--color-card-bg);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--space-xl);
    transition: var(--transition);
    text-decoration: none;
    display: block;
}

.topic-card:hover,
.topic-card-klasse9:hover,
.topic-card-klasse10:hover,
.topic-card-klasse11:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-primary);
}

.topic-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-md);
}

.topic-icon {
    font-size: 2.5em;
}

.topic-badge {
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.8em;
    font-weight: 600;
    color: white;
    white-space: nowrap;
}

.topic-badge.wichtig {
    background: var(--color-accent-red);
}

.topic-badge.new {
    background: var(--color-accent-green);
}

.topic-badge.grundlagen {
    background: var(--color-primary);
}

.topic-card h3,
.topic-card-klasse9 h3,
.topic-card-klasse10 h3,
.topic-card-klasse11 h3 {
    color: var(--color-text);
    margin-bottom: var(--space-sm);
    font-size: var(--font-size-lg);
}

.topic-card p,
.topic-card-klasse9 p,
.topic-card-klasse10 p,
.topic-card-klasse11 p {
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
    line-height: 1.6;
}

.topic-highlights {
    list-style: none;
    padding: 0;
    margin: 0;
}

.topic-highlights li {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    padding: 4px 0;
    padding-left: 20px;
    position: relative;
}

.topic-highlights li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-accent-green);
    font-weight: bold;
}

/* Resources Section */
.resources-section {
    background: var(--color-exercise-bg);
    padding: var(--space-xxl);
    border-radius: var(--border-radius-lg);
    margin: var(--space-xxl) 0;
}

.resources-title {
    text-align: center;
    color: var(--color-primary);
    margin-bottom: var(--space-xl);
    font-size: var(--font-size-xxl);
}

.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.resource-card {
    background: var(--color-card-bg);
    padding: var(--space-xl);
    border-radius: var(--border-radius-lg);
    text-align: center;
    transition: var(--transition);
    text-decoration: none;
    display: block;
}

.resource-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.resource-icon {
    font-size: 3em;
    margin-bottom: var(--space-md);
}

.resource-card h3 {
    color: var(--color-text);
    margin-bottom: var(--space-sm);
}

.resource-card p {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

/* Tips Box */
.tips-box {
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    padding: var(--space-xxl);
    border-radius: var(--border-radius-lg);
    margin: var(--space-xxl) 0;
}

@media (prefers-color-scheme: dark) {
    .tips-box {
        background: linear-gradient(135deg, #1a3a5a 0%, #2a4a6a 100%);
    }
}

.tips-box h3,
.tips-box h4 {
    color: #0d47a1;
    text-align: center;
    margin-bottom: var(--space-xl);
    font-size: var(--font-size-xl);
}

@media (prefers-color-scheme: dark) {
    .tips-box h3,
    .tips-box h4 {
        color: #90caf9;
    }
}

.tips-content {
    display: grid;
    gap: var(--space-lg);
}

.tip-item {
    display: flex;
    gap: var(--space-md);
    align-items: flex-start;
}

.tip-icon {
    font-size: 2em;
    flex-shrink: 0;
}

.tip-text {
    line-height: 1.6;
    color: #1565c0;
}

@media (prefers-color-scheme: dark) {
    .tip-text {
        color: #bbdefb;
    }
}

/* Lehrplan Box */
.lehrplan-box {
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    padding: 25px;
    border-radius: var(--border-radius-lg);
    margin: var(--space-xxl) 0;
    border: 3px solid #2196f3;
}

@media (prefers-color-scheme: dark) {
    .lehrplan-box {
        background: linear-gradient(135deg, #1a3a5a 0%, #2a4a6a 100%);
        border-color: #4a7a9a;
    }
}

.lehrplan-box h4 {
    color: #0d47a1;
    margin-bottom: 15px;
}

@media (prefers-color-scheme: dark) {
    .lehrplan-box h4 {
        color: #90caf9;
    }
}

.lehrplan-box p {
    color: #1565c0;
    line-height: 1.7;
    margin: 0;
}

@media (prefers-color-scheme: dark) {
    .lehrplan-box p {
        color: #bbdefb;
    }
}

/* Back Navigation */
.back-navigation {
    text-align: center;
    margin: var(--space-xxl) 0;
}

.back-btn,
.back-to-overview {
    display: inline-block;
    padding: var(--space-md) var(--space-xxl);
    background: var(--color-primary);
    color: white;
    border-radius: var(--border-radius-lg);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.back-btn:hover,
.back-to-overview:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    color: white;
}

/* Page Footer */
.page-footer {
    text-align: center;
    padding: var(--space-xl);
    border-top: 2px solid var(--color-border);
    margin-top: var(--space-xxl);
    color: var(--color-text-muted);
}

/* ===== TOPIC PAGES (Lesson/Calculator Pages) ===== */

/* Calculator Header */
.calculator-header {
    text-align: center;
    padding: var(--space-xl);
    background: var(--color-card-bg);
    border-radius: var(--border-radius-lg);
    margin-bottom: var(--space-xl);
    border: 2px solid var(--color-border);
}

.calculator-title {
    font-size: var(--font-size-xxl);
    color: var(--color-primary);
    margin-bottom: var(--space-sm);
}

.calculator-class-badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--color-primary-gradient-start), var(--color-primary-gradient-end));
    color: white;
    padding: 8px 20px;
    border-radius: 25px;
    font-weight: 600;
    margin: var(--space-md) 0;
}

.calculator-subtitle {
    color: var(--color-text-muted);
    font-size: var(--font-size-lg);
    max-width: 800px;
    margin: 0 auto;
}

/* Formula Box */
.formula-box {
    background: var(--color-card-bg);
    border: 2px solid var(--color-primary);
    border-radius: var(--border-radius);
    padding: var(--space-lg);
    text-align: center;
    font-size: var(--font-size-xl);
    font-weight: bold;
    color: var(--color-primary);
    margin: var(--space-lg) 0;
    font-family: 'Courier New', monospace;
}

/* Calculation Explanation */
.calculation-explanation {
    line-height: 1.8;
    color: var(--color-text);
    margin: var(--space-md) 0;
}

.calculation-formula {
    background: var(--color-exercise-bg);
    padding: var(--space-md);
    border-radius: var(--border-radius);
    margin: var(--space-md) 0;
    text-align: center;
}

/* Method Navigation */
.method-navigation {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
    margin: var(--space-xl) 0;
    justify-content: center;
}

.method-nav-button {
    padding: var(--space-sm) var(--space-lg);
    background: var(--color-card-bg);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    text-decoration: none;
    color: var(--color-text);
    transition: var(--transition);
    font-weight: 600;
}

.method-nav-button:hover,
.method-nav-button.active {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

/* Concept Section */
.concept-section {
    margin: var(--space-xxl) 0;
}

.concept-section h3 {
    color: var(--color-primary);
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-lg);
}

/* Step by Step */
.step-by-step {
    background: var(--color-card-bg);
    border-left: 4px solid var(--color-accent-green);
    padding: var(--space-lg);
    border-radius: var(--border-radius);
    margin: var(--space-md) 0;
}

.step-by-step ol {
    margin-left: var(--space-lg);
    line-height: 1.8;
}

/* Example Box */
.example-box {
    background: var(--color-exercise-bg);
    padding: var(--space-lg);
    border-radius: var(--border-radius-lg);
    margin: var(--space-lg) 0;
    line-height: 1.8;
}

/* Calculator Input Section */
.calculator-input-section {
    background: var(--color-card-bg);
    padding: var(--space-xl);
    border-radius: var(--border-radius-lg);
    border: 2px solid var(--color-border);
    margin: var(--space-xl) 0;
}

.calculator-input-section h3 {
    color: var(--color-primary);
    margin-bottom: var(--space-md);
}

.point-inputs,
.input-group {
    display: grid;
    gap: var(--space-lg);
}

.point-input,
.input-field {
    margin-bottom: var(--space-md);
}

.point-input label,
.input-field label {
    display: block;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
}

.calculator-input {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    background: var(--color-card-bg);
    color: var(--color-text);
    transition: var(--transition);
}

.calculator-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(46, 125, 50, 0.1);
}

/* Calculator Button */
.calculate-btn {
    display: block;
    width: 100%;
    padding: var(--space-md);
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--border-radius-lg);
    font-size: var(--font-size-lg);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.calculate-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Result Display */
.result-display,
.solution-box {
    background: linear-gradient(135deg, #e8f5e9, #c8e6c9);
    border: 2px solid var(--color-accent-green);
    border-radius: var(--border-radius-lg);
    padding: var(--space-xl);
    margin: var(--space-xl) 0;
}

@media (prefers-color-scheme: dark) {
    .result-display,
    .solution-box {
        background: linear-gradient(135deg, #1a3a1a, #2a4a2a);
    }
}

.result-display h4,
.solution-box h4 {
    color: var(--color-accent-green-dark);
    margin-bottom: var(--space-md);
}

/* Category Section */
.category-section {
    margin: var(--space-xxl) 0;
}

.category-header {
    margin-bottom: var(--space-xl);
}

.category-header h2 {
    color: var(--color-primary);
    font-size: var(--font-size-xxl);
    margin-bottom: var(--space-sm);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.category-icon {
    font-size: 1.3em;
}

.topic-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
}

/* Info Box */
.info-box {
    background: var(--color-exercise-bg);
    border-left: 4px solid var(--color-primary);
    padding: var(--space-xl);
    border-radius: var(--border-radius-lg);
    margin: var(--space-xl) 0;
}

.info-box h4 {
    color: var(--color-primary);
    margin-bottom: var(--space-md);
}

.calculation-explanation {
    line-height: 1.8;
    color: var(--color-text);
}

/* Result Box (alias for result-display) */
.result-box {
    background: linear-gradient(135deg, #e8f5e9, #c8e6c9);
    border: 2px solid var(--color-accent-green);
    border-radius: var(--border-radius-lg);
    padding: var(--space-xl);
    margin: var(--space-xl) 0;
}

@media (prefers-color-scheme: dark) {
    .result-box {
        background: linear-gradient(135deg, #1a3a1a, #2a4a2a);
    }
}

.result-box h4 {
    color: var(--color-accent-green-dark);
    margin-bottom: var(--space-md);
}

/* Calculator Button (alias for calculate-btn) */
.calculator-button {
    display: block;
    width: 100%;
    padding: var(--space-md);
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--border-radius-lg);
    font-size: var(--font-size-lg);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.calculator-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Function Preview */
.function-preview {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-primary);
    padding: var(--space-md);
    background: var(--color-card-bg);
    border-radius: var(--border-radius);
    text-align: center;
    margin: var(--space-md) 0;
}

/* Graph Visualization */
.graph-container {
    background: var(--color-card-bg);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--space-lg);
    margin: var(--space-xl) 0;
    display: flex;
    justify-content: center;
    align-items: center;
}

.graph-canvas {
    max-width: 100%;
    border-radius: var(--border-radius);
}

/* Calculator Container */
.calculator-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: var(--space-lg);
}

.calculator-body {
    background: var(--color-bg);
}

/* Back to Overview */
.back-to-overview {
    display: inline-block;
    padding: var(--space-md) var(--space-xl);
    background: var(--color-card-bg);
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
    border-radius: var(--border-radius-lg);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.back-to-overview:hover {
    background: var(--color-primary);
    color: white;
    transform: translateY(-2px);
}

/* ===== HOMEPAGE INFO SECTION ===== */
.info-section {
    margin-top: 60px;
}

.info-section .intro-text {
    margin: 20px 0;
    line-height: 1.8;
}

.features-section {
    margin-top: 30px;
}

.features-list {
    list-style: none;
    padding: 0;
    margin: 20px 0;
}

.features-list li {
    padding: 8px 0;
    font-size: var(--font-size-md);
}

/* ===== SCHNELLAUSWAHL (QUICK SELECTION) ===== */
.schnellauswahl-container {
    background: var(--color-card-bg);
    border-radius: var(--border-radius-lg);
    padding: var(--space-xxl);
    margin: var(--space-xxl) 0;
    box-shadow: var(--shadow);
}

.schnellauswahl-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.schnellauswahl-header h2 {
    color: var(--color-primary);
    font-size: 2em;
    margin-bottom: var(--space-sm);
}

.schnellauswahl-header p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-lg);
}

.schnell-kategorie {
    margin-bottom: var(--space-xl);
}

.kategorie-titel {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1.3em;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 2px solid var(--color-border);
}

.kategorie-icon {
    font-size: 1.5em;
}

.schnellauswahl-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: var(--space-md);
}

.klassen-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
    background: linear-gradient(135deg, var(--color-primary-gradient-start), var(--color-primary-gradient-end));
    color: white;
    border-radius: var(--border-radius-lg);
    text-decoration: none;
    transition: var(--transition);
    min-height: 100px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.klassen-btn:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
}

.klassen-nummer {
    font-size: 2.5em;
    font-weight: 700;
    line-height: 1;
}

.klassen-label {
    font-size: 0.9em;
    opacity: 0.95;
    margin-top: var(--space-xs);
}

.klassen-btn.grundschule {
    background: linear-gradient(135deg, #4CAF50, #66BB6A);
}

.klassen-btn.sek1 {
    background: linear-gradient(135deg, #2196F3, #42A5F5);
}

.klassen-btn.sek2 {
    background: linear-gradient(135deg, #9C27B0, #BA68C8);
}

.klassen-btn.bwl {
    background: linear-gradient(135deg, #FF9800, #FFA726);
}

.klassen-btn.tools {
    background: linear-gradient(135deg, #607D8B, #78909C);
}

.klassen-btn.special {
    min-height: auto;
}

.klassen-btn.special .klassen-nummer {
    font-size: 2em;
}

.klassen-btn.special .klassen-label {
    font-size: 0.85em;
}

/* ===== LEVEL TRANSITIONS ===== */
.level-transition {
    margin: var(--space-xxl) 0;
    text-align: center;
}

.transition-box {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: white;
    padding: var(--space-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
}

.transition-icon {
    font-size: 3em;
    margin-bottom: var(--space-md);
}

.transition-box h2 {
    color: white;
    font-size: 2em;
    margin-bottom: var(--space-sm);
}

.transition-box p {
    color: rgba(255, 255, 255, 0.95);
    font-size: var(--font-size-lg);
}

/* ===== TOPIC BOXES ===== */
.topic-box {
    background: rgba(var(--color-primary-rgb), 0.1);
    padding: var(--space-sm);
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-sm);
    text-align: center;
}

/* ===== GOAL SECTION ===== */
.goal {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin: var(--space-xxl) 0;
    padding: var(--space-xxl);
    background: linear-gradient(135deg, #FFD700, #FFA500);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    text-align: center;
}

.goal-marker {
    font-size: 4em;
    margin-bottom: var(--space-md);
}

.goal-content h2 {
    color: white;
    font-size: 2.5em;
    margin-bottom: var(--space-sm);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.goal-content p {
    color: white;
    font-size: var(--font-size-xl);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .grade-hero {
        padding: var(--space-xl) var(--space-md);
    }

    .hero-title {
        font-size: 1.8em;
    }

    .section-header {
        flex-direction: column;
        text-align: center;
    }

    .section-icon {
        width: 60px;
        height: 60px;
        font-size: 2em;
    }

    .topics-grid,
    .topic-grid {
        grid-template-columns: 1fr;
    }

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

    .method-nav-button {
        width: 100%;
        text-align: center;
    }
}