/* Lingmersion Lesson Quiz Styles - Bunpo Inspired */

:root {
    /* Lingmersion Brand Colors */
    --primary: #f85d41;
    --primary-light: #ff7a5c;
    --primary-dark: #e04a2b;
    --secondary: #2d3748;
    --accent: #4299e1;
    
    /* Neutral Colors */
    --white: #ffffff;
    --gray-50: #f7fafc;
    --gray-100: #edf2f7;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e0;
    --gray-400: #a0aec0;
    --gray-500: #718096;
    --gray-600: #4a5568;
    --gray-700: #2d3748;
    --gray-800: #1a202c;
    --gray-900: #171923;
    
    /* Status Colors */
    --success: #48bb78;
    --warning: #ed8936;
    --error: #f56565;
    --info: #4299e1;
    
    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    
    /* Typography */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
    --radius-full: 9999px;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Screen Reader Only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Skip to main content link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--primary);
    color: white;
    padding: 8px;
    text-decoration: none;
    border-radius: 4px;
    z-index: 1000;
    font-weight: 600;
}

.skip-link:focus {
    top: 6px;
}

/* Focus styles for accessibility */
*:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--gray-800);
    background: linear-gradient(135deg, #fef7f0 0%, #fff5e6 25%, #f0f9ff 50%, #fef3c7 75%, #fef2f2 100%);
    min-height: 100vh;
}

.lesson-body {
    background: linear-gradient(135deg, #fef7f0 0%, #fff5e6 25%, #f0f9ff 50%, #fef3c7 75%, #fef2f2 100%);
    min-height: 100vh;
}

/* Header Styles */
.lesson-header {
    background: var(--white);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-4) var(--spacing-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-6);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.logo-img {
    width: 2rem;
    height: 2rem;
}

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary);
    text-decoration: none !important; /* Remove any underline */
    border-bottom: none !important; /* Remove any border line */
}

.logo a,
.logo a:hover,
.logo a:visited,
.logo a:active {
    text-decoration: none !important;
    border-bottom: none !important;
}

/* Home Button */
.header-actions {
    display: flex;
    align-items: center;
}

.home-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-4);
    background: var(--primary);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: var(--font-size-sm);
    transition: all 0.2s ease;
    box-shadow: 0 2px 4px rgba(248, 93, 65, 0.2);
}

.home-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(248, 93, 65, 0.3);
}

.home-icon {
    font-size: var(--font-size-lg);
}

.home-text {
    font-weight: 600;
}

.lesson-progress {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    flex: 1;
    max-width: 300px;
}

.progress-bar {
    flex: 1;
    height: 8px;
    background: var(--gray-200);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    border-radius: var(--radius-full);
    transition: width 0.3s ease;
    width: 8.33%; /* 1/12 */
}

.progress-text {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--gray-600);
    min-width: 40px;
}

.lesson-info {
    text-align: right;
}

.lesson-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: var(--spacing-1);
    text-decoration: none; /* Remove any underline */
    border-bottom: none; /* Remove any border-bottom */
}

.lesson-level {
    font-size: var(--font-size-sm);
    color: var(--primary);
    font-weight: 600;
    background: rgba(248, 93, 65, 0.1);
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--radius-full);
}

/* Main Content */
.lesson-main {
    padding: var(--spacing-8) var(--spacing-4);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 80px);
}

.lesson-container {
    max-width: 800px;
    width: 100%;
    position: relative;
}

/* Lesson Cards */
.lesson-cards {
    position: relative;
    width: 100%;
    height: 700px;
    perspective: 1000px;
}

.lesson-card {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--white);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    padding: var(--spacing-6);
    display: flex;
    flex-direction: column;
    opacity: 0;
    transform: translateX(100%) rotateY(15deg);
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    backface-visibility: hidden;
    overflow-y: auto;
}

.lesson-card.active {
    opacity: 1;
    transform: translateX(0) rotateY(0deg);
    z-index: 10;
}

.lesson-card.prev {
    opacity: 0.3;
    transform: translateX(-100%) rotateY(-15deg);
    z-index: 5;
}

.lesson-card.next {
    opacity: 0.3;
    transform: translateX(100%) rotateY(15deg);
    z-index: 5;
}

/* Card Header */
.card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-6);
    padding-bottom: var(--spacing-4);
    /* border-bottom: 2px solid var(--gray-100); */ /* Removed - user preference */
}

.card-icon {
    font-size: 2rem;
    width: 3rem;
    height: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: var(--radius-xl);
    color: var(--white);
}

.card-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--gray-800);
    text-decoration: none; /* Remove any underline */
    border-bottom: none; /* Remove any border-bottom */
}

/* Card Content */
.card-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* Theory Content */
.theory-content {
    text-align: center;
}

.theory-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--primary);
    margin-bottom: var(--spacing-6);
}

.theory-description {
    font-size: var(--font-size-lg);
    color: var(--gray-600);
    margin-bottom: var(--spacing-8);
    line-height: 1.7;
}

.theory-rules {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
    max-width: 500px;
    margin: 0 auto;
}

.rule-item {
    background: var(--gray-50);
    padding: var(--spacing-4);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--primary);
    font-size: var(--font-size-base);
    color: var(--gray-700);
}

/* Examples Content */
.examples-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
}

/* Video Section */
.video-section {
    margin-bottom: var(--spacing-6);
}

.video-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--primary);
    margin-bottom: var(--spacing-3);
    text-align: center;
}

.video-container {
    position: relative;
    width: 100%;
    height: 0;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.example-item {
    background: var(--gray-50);
    padding: var(--spacing-6);
    border-radius: var(--radius-xl);
    border: 2px solid var(--gray-200);
    transition: all 0.3s ease;
}

.example-item:hover {
    border-color: var(--primary);
    background: rgba(248, 93, 65, 0.05);
}

.example-sentence {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-3);
}

.sentence-text {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--gray-800);
    flex: 1;
}

.sentence-actions {
    display: flex;
    gap: var(--spacing-2);
}

.btn-audio, .btn-translate {
    width: 2.5rem;
    height: 2.5rem;
    border: none;
    border-radius: var(--radius-full);
    background: var(--primary);
    color: var(--white);
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-audio:hover, .btn-translate:hover {
    background: var(--primary-dark);
    transform: scale(1.1);
}

.example-translation {
    font-size: var(--font-size-lg);
    color: var(--gray-600);
    font-style: italic;
    padding: var(--spacing-3);
    background: var(--white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
}

.example-translation.hidden {
    display: none;
}

/* Exercise Content */
.exercise-content {
    text-align: center;
}

.exercise-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--primary);
    margin-bottom: var(--spacing-4);
}

.exercise-instruction {
    font-size: var(--font-size-lg);
    color: var(--gray-600);
    margin-bottom: var(--spacing-8);
}

.exercise-question {
    margin-bottom: var(--spacing-8);
}

/* ═══════════════════════════════════════════════════════════════
   EXERCISE TYPES - DRAG & DROP / ORGANIZE SENTENCE
   ═══════════════════════════════════════════════════════════════ */

/* Option Blocks - Used for draggable word/sentence organization exercises */
.exercise-options {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-3);
    justify-content: center;
}

.option-block {
    padding: var(--spacing-3) var(--spacing-5);
    background: var(--white);
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--gray-700);
    cursor: grab;
    transition: all 0.3s ease;
    user-select: none;
}

.option-block:hover {
    border-color: var(--primary);
    background: rgba(248, 93, 65, 0.05);
    transform: translateY(-2px);
}

.option-block:active {
    cursor: grabbing;
}

.option-block.used {
    opacity: 0.3;
    cursor: not-allowed;
}

/* Sentence Organization - Drop zone for organizing sentence blocks */
.sentence-blocks {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-3);
    justify-content: center;
    min-height: 60px;
    padding: var(--spacing-4);
    border: 2px dashed var(--gray-300);
    border-radius: var(--radius-lg);
    background: var(--gray-50);
}

.sentence-blocks .option-block {
    margin: 0;
}

/* ═══════════════════════════════════════════════════════════════
   AUDIO PLAYER - For listening exercises and pronunciation
   ═══════════════════════════════════════════════════════════════ */

.audio-player {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-6);
}

.btn-audio-large {
    padding: var(--spacing-4) var(--spacing-8);
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: var(--radius-xl);
    font-size: var(--font-size-lg);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.btn-audio-large:hover {
    background: var(--primary-dark);
    transform: scale(1.05);
}

.audio-progress {
    width: 100%;
    max-width: 300px;
}

.audio-progress .progress-bar {
    height: 6px;
    background: var(--gray-200);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.audio-progress .progress-fill {
    height: 100%;
    background: var(--primary);
    border-radius: var(--radius-full);
    transition: width 0.1s ease;
}

/* Input Field */
.input-field {
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
}

.text-input {
    width: 100%;
    padding: var(--spacing-4);
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-lg);
    text-align: center;
    transition: all 0.3s ease;
}

.text-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(248, 93, 65, 0.1);
}

/* Matching Exercise */
.matching-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-8);
    max-width: 600px;
    margin: 0 auto;
}

.matching-column h4 {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--primary);
    margin-bottom: var(--spacing-4);
    text-align: center;
}

.matching-item {
    padding: var(--spacing-4);
    background: var(--white);
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-3);
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    font-weight: 600;
}

.matching-item:hover {
    border-color: var(--primary);
    background: rgba(248, 93, 65, 0.05);
}

.matching-item.selected {
    border-color: var(--primary);
    background: var(--primary);
    color: var(--white);
}

.matching-item.correct {
    border-color: var(--success);
    background: var(--success);
    color: var(--white);
}

.matching-item.incorrect {
    border-color: var(--error);
    background: var(--error);
    color: var(--white);
}

/* Card Footer */
.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-6);
    border-top: 2px solid var(--gray-100);
    margin-top: auto;
}

/* Buttons */
.btn {
    padding: var(--spacing-3) var(--spacing-6);
    border: none;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    text-decoration: none;
}

.btn-primary {
    background: var(--primary);
    color: var(--white);
}

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

.btn-secondary {
    background: var(--gray-200);
    color: var(--gray-700);
}

.btn-secondary:hover {
    background: var(--gray-300);
    transform: translateY(-2px);
}

/* Wrong Answers Review */
.wrong-answers-review {
    background: var(--white);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    padding: var(--spacing-8);
    text-align: center;
}

.review-header h2 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--primary);
    margin-bottom: var(--spacing-4);
    text-decoration: none; /* Remove any underline */
    border-bottom: none; /* Remove any border-bottom */
}

.review-header p {
    font-size: var(--font-size-lg);
    color: var(--gray-600);
    margin-bottom: var(--spacing-8);
}

/* Lesson Complete */
.lesson-complete {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(5px);
}

.lesson-complete .complete-content {
    background: var(--white);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    padding: var(--spacing-12);
    text-align: center;
    max-width: 500px;
    width: 90%;
    margin: 0 auto;
    animation: slideInUp 0.5s ease-out;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}


.complete-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-6);
}

.lesson-complete h2 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--primary);
    margin-bottom: var(--spacing-4);
    text-decoration: none; /* Remove any underline */
    border-bottom: none; /* Remove any border-bottom */
}

.lesson-complete p {
    font-size: var(--font-size-lg);
    color: var(--gray-600);
    margin-bottom: var(--spacing-8);
}

.complete-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-8);
    margin-bottom: var(--spacing-8);
}

.stat-item {
    text-align: center;
}

.stat-label {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--gray-500);
    margin-bottom: var(--spacing-1);
}

.stat-value {
    display: block;
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--primary);
}

.complete-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
    justify-content: center;
    align-items: center;
}

.xp-reward {
    margin-bottom: var(--spacing-4);
}

.xp-reward .btn {
    background: linear-gradient(135deg, #ffd700, #ffed4e);
    color: var(--gray-800);
    font-weight: 700;
    font-size: var(--font-size-lg);
    padding: var(--spacing-4) var(--spacing-6);
    border-radius: var(--radius-full);
    box-shadow: 0 4px 15px rgba(255, 215, 0, 0.3);
    border: none;
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    animation: pulse 2s infinite;
}

.xp-reward .star-icon {
    font-size: var(--font-size-xl);
    animation: sparkle 1.5s ease-in-out infinite;
}

.navigation-buttons {
    display: flex;
    gap: var(--spacing-3);
    justify-content: center;
    flex-wrap: wrap;
}

.navigation-buttons .btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-5);
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-radius: var(--radius-lg);
    transition: all 0.3s ease;
}

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

.navigation-buttons .btn .icon {
    font-size: var(--font-size-base);
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@keyframes sparkle {
    0%, 100% {
        transform: rotate(0deg) scale(1);
    }
    25% {
        transform: rotate(-10deg) scale(1.1);
    }
    75% {
        transform: rotate(10deg) scale(1.1);
    }
}

/* XP Display */
.xp-display {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    color: white;
    padding: var(--spacing-3) var(--spacing-6);
    border-radius: var(--radius-xl);
    margin: var(--spacing-4) 0;
    box-shadow: var(--shadow-lg);
}

.xp-icon {
    font-size: 1.5rem;
}

.xp-text {
    font-size: var(--font-size-lg);
    font-weight: 700;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

/* Multiple Choice Styles */
.multiple-choice {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

.option-button {
    width: 100%;
    padding: var(--spacing-3);
    background: var(--white);
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--gray-700);
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: left;
    display: flex;
    align-items: center;
    min-height: 50px;
    word-wrap: break-word;
}

.option-button:hover {
    border-color: var(--primary);
    background: rgba(248, 93, 65, 0.05);
    transform: translateY(-2px);
}

.option-button.selected {
    border-color: var(--primary);
    background: var(--primary);
    color: var(--white);
}

.option-button.correct {
    border-color: var(--success);
    background: var(--success);
    color: var(--white);
}

.option-button.incorrect {
    border-color: var(--error);
    background: var(--error);
    color: var(--white);
}

.option-button.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Drop Zone Styles */
.drop-zone {
    min-height: 80px;
    border: 2px dashed var(--gray-300);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-6);
    background: var(--gray-50);
    transition: all 0.3s ease;
}

.drop-zone.drag-over {
    border-color: var(--primary);
    background: rgba(248, 93, 65, 0.1);
}

.drop-zone.filled {
    border-style: solid;
    border-color: var(--primary);
    background: var(--primary);
    color: var(--white);
}

.drop-zone.correct {
    border-color: var(--success);
    background: var(--success);
}

.drop-zone.incorrect {
    border-color: var(--error);
    background: var(--error);
}

.drop-zone-text {
    font-size: var(--font-size-lg);
    color: var(--gray-500);
    font-weight: 500;
}

.drop-zone.filled .drop-zone-text {
    color: var(--white);
    font-weight: 600;
}

/* Question Text Styles */
.question-text {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: var(--spacing-4);
    text-align: center;
}

.hint-text {
    font-size: var(--font-size-sm);
    color: var(--gray-500);
    font-style: italic;
    margin-bottom: var(--spacing-4);
    text-align: center;
}

/* Picture Match Styles */
.picture-match-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: var(--spacing-6);
    gap: var(--spacing-6);
}

.pictures-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-4);
    max-width: 500px;
    width: 100%;
}

.picture-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-4);
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    border: 2px solid var(--gray-200);
    transition: all 0.3s ease;
    cursor: pointer;
    min-height: 120px;
}

.picture-item.picture-drop-zone {
    border: 2px dashed var(--gray-300);
}

.picture-item.picture-drop-zone.drag-over {
    border-color: var(--primary);
    background: rgba(248, 93, 65, 0.1);
    transform: scale(1.05);
}

.picture-item.picture-drop-zone.filled {
    border-style: solid;
    border-color: var(--primary);
    background: var(--primary);
    color: var(--white);
}

.picture-image {
    font-size: 3rem;
    text-align: center;
}

.drop-text {
    font-size: var(--font-size-sm);
    color: var(--gray-500);
    font-weight: 500;
}

.picture-drop-zone.filled .drop-text {
    color: var(--white);
    font-weight: 600;
}

.word-options {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-3);
    justify-content: center;
    max-width: 500px;
}

.word-option {
    padding: var(--spacing-3) var(--spacing-4);
    background: var(--white);
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--gray-700);
    cursor: grab;
    transition: all 0.3s ease;
    text-align: center;
    min-width: 80px;
}

.word-option:hover {
    border-color: var(--primary);
    background: rgba(248, 93, 65, 0.05);
    transform: translateY(-2px);
}

.word-option:active {
    cursor: grabbing;
}

.word-option.used {
    opacity: 0.3;
    cursor: not-allowed;
}

.picture-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-4);
    color: var(--gray-400);
}

.picture-placeholder p {
    font-size: var(--font-size-lg);
    color: var(--gray-600);
    margin-bottom: var(--spacing-2);
}

.small-text {
    font-size: var(--font-size-sm) !important;
    color: var(--gray-500) !important;
}

/* Enhanced Drag and Drop */
.option-block.dragging {
    opacity: 0.5;
    transform: rotate(5deg);
}

.option-block.drag-over {
    border-color: var(--primary);
    background: rgba(248, 93, 65, 0.1);
}

/* Sentence Blocks Enhancement */
.sentence-blocks.drag-over {
    border-color: var(--primary);
    background: rgba(248, 93, 65, 0.05);
}

.sentence-blocks .option-block {
    margin: 0;
    position: relative;
}

.sentence-blocks .option-block.correct {
    border-color: var(--success);
    background: var(--success);
    color: var(--white);
}

.sentence-blocks .option-block.incorrect {
    border-color: var(--error);
    background: var(--error);
    color: var(--white);
}

/* Audio Player Enhancement */
.audio-player {
    margin-bottom: var(--spacing-6);
}

.btn-audio-large:active {
    transform: scale(0.95);
}

/* Input Field Enhancement */
.text-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(248, 93, 65, 0.1);
}

.text-input.correct {
    border-color: var(--success);
    background: rgba(72, 187, 120, 0.1);
}

.text-input.incorrect {
    border-color: var(--error);
    background: rgba(245, 101, 101, 0.1);
}

/* Enhanced Responsive Design */
@media (max-width: 1024px) {
    .lesson-cards {
        height: 600px;
    }
    
    .lesson-card {
        padding: var(--spacing-5);
    }
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: var(--spacing-4);
        text-align: center;
        padding: var(--spacing-3) var(--spacing-4);
    }
    
    .lesson-progress {
        max-width: none;
        width: 100%;
        order: 2;
    }
    
    .lesson-info {
        order: 1;
        text-align: center;
    }
    
    .lesson-cards {
        height: auto;
        min-height: 500px;
        perspective: none;
    }
    
    .lesson-card {
        padding: var(--spacing-4);
        height: auto;
        min-height: 500px;
        position: relative;
        transform: none;
        opacity: 1;
        margin-bottom: var(--spacing-4);
    }
    
    .lesson-card.active,
    .lesson-card.prev,
    .lesson-card.next {
        transform: none;
        opacity: 1;
    }
    
    .matching-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-6);
    }
    
    .complete-stats {
        flex-direction: column;
        gap: var(--spacing-4);
    }
    
    .complete-actions {
        flex-direction: column;
    }
    
    .card-footer {
        flex-direction: column;
        gap: var(--spacing-3);
    }
    
    .option-button {
        padding: var(--spacing-3);
        font-size: var(--font-size-base);
        min-height: 44px;
    }
    
    .drop-zone {
        min-height: 60px;
    }
    
    .picture-placeholder {
        padding: var(--spacing-6);
    }
    
    .picture-icon {
        font-size: 2rem;
    }
    
    .video-container {
        padding-bottom: 56.25%;
    }
    
    .exercise-options {
        flex-direction: column;
        align-items: center;
    }
    
    .option-block {
        width: 100%;
        max-width: 200px;
        text-align: center;
    }
}

@media (max-width: 640px) {
    .lesson-main {
        padding: var(--spacing-4) var(--spacing-2);
    }
    
    .lesson-card {
        padding: var(--spacing-3);
        min-height: 400px;
    }
    
    .card-header {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-2);
    }
    
    .card-icon {
        font-size: 1.5rem;
        width: 2.5rem;
        height: 2.5rem;
    }
    
    .card-title {
        font-size: var(--font-size-xl);
    }
    
    .theory-title {
        font-size: var(--font-size-2xl);
    }
    
    .exercise-title {
        font-size: var(--font-size-xl);
    }
    
    .sentence-text {
        font-size: var(--font-size-lg);
    }
    
    .btn {
        padding: var(--spacing-3) var(--spacing-4);
        font-size: var(--font-size-sm);
        min-height: 44px;
    }
    
    .option-block {
        padding: var(--spacing-2) var(--spacing-3);
        font-size: var(--font-size-base);
    }
    
    .text-input {
        padding: var(--spacing-3);
        font-size: var(--font-size-base);
    }
}

@media (max-width: 480px) {
    .lesson-main {
        padding: var(--spacing-2);
    }
    
    .lesson-card {
        padding: var(--spacing-2);
        min-height: 350px;
    }
    
    .hero-title {
        font-size: var(--font-size-2xl);
    }
    
    .theory-title {
        font-size: var(--font-size-xl);
    }
    
    .exercise-title {
        font-size: var(--font-size-lg);
    }
    
    .sentence-text {
        font-size: var(--font-size-base);
    }
    
    .btn {
        width: 100%;
        max-width: none;
    }
    
    .option-block {
        padding: var(--spacing-2);
        font-size: var(--font-size-sm);
    }
    
    .pictures-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-3);
    }
    
    .word-options {
        flex-direction: column;
        align-items: center;
    }
    
    .word-option {
        width: 100%;
        max-width: 150px;
    }
}

/* Rule Boxes Styling - Orange Accent Theme */
.rule-boxes-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
    margin-top: var(--spacing-4);
    margin-bottom: var(--spacing-4);
}

.rule-box {
    background: linear-gradient(135deg, #fff5f0 0%, #ffffff 100%);
    border-left: 4px solid var(--primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-4);
    box-shadow: 0 2px 8px rgba(248, 93, 65, 0.1);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.rule-box:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(248, 93, 65, 0.15);
}

.rule-label {
    font-weight: 700;
    color: var(--primary);
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-2);
    display: flex;
    align-items: center;
}

.rule-label::before {
    content: '▸';
    margin-right: var(--spacing-2);
    font-size: var(--font-size-xl);
}

.rule-formula {
    color: var(--gray-700);
    font-size: var(--font-size-base);
    line-height: 1.6;
    padding-left: var(--spacing-4);
}

/* Video description styling */
.video-description {
    margin-top: var(--spacing-3);
    padding: var(--spacing-3);
    background: var(--gray-50);
    border-radius: var(--radius-md);
    color: var(--gray-700);
    font-size: var(--font-size-base);
}

/* Button group styling */
.button-group {
    display: flex;
    gap: var(--spacing-3);
    margin-top: var(--spacing-4);
    justify-content: space-between;
}

.button-group .btn {
    flex: 1;
}

.btn-secondary {
    background: var(--gray-200);
    color: var(--gray-700);
}

.btn-secondary:hover {
    background: var(--gray-300);
}

/* ═══════════════════════════════════════════════════════════════
   FILL-IN-THE-BLANK EXERCISES - ULTRA BEAUTIFUL VERSION
   ═══════════════════════════════════════════════════════════════
   This section contains ALL styling for fill-in-the-blank exercises.
   DO NOT create duplicate sections elsewhere in this file!
   Includes: sentence containers, blank elements, input fields, word bank
   ═══════════════════════════════════════════════════════════════ */

/* Sentence Container - Main wrapper for fill-in-the-blank questions */
.sentence-blank {
    font-size: 1.25rem;
    line-height: 2;
    color: var(--gray-800);
    margin: 2rem 0;
    padding: 2rem;
    background: var(--white);
    border-radius: 12px;
    border: 2px solid var(--gray-200);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

/* Blank Elements - Clickable blanks for word bank exercises (NOT input fields) */
.blank {
    display: inline-block;
    min-width: 100px;
    height: 40px;
    margin: 0 8px;
    padding: 8px 16px;
    background: var(--white);
    border: 2px solid var(--primary);
    border-radius: 8px;
    color: var(--primary);
    font-weight: 600;
    font-size: 1.1rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(248, 93, 65, 0.1);
    user-select: none;
}

/* Hover state for blank elements */
.blank:hover {
    background: var(--primary-light);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(248, 93, 65, 0.2);
}

/* Correct answer state */
.blank.correct {
    background: var(--success);
    border-color: var(--success);
    color: var(--white);
}

/* Incorrect answer state */
.blank.incorrect {
    background: var(--error);
    border-color: var(--error);
    color: var(--white);
}

/* Blank Input Wrapper - For type-in fill-in-the-blank exercises */
.blank-input {
    display: inline-block;
    min-width: 100px;
    height: 40px;
    margin: 0 8px;
}

/* Input field styling - actual text input element */
.blank-input input {
    width: 100%;
    height: 100%;
    padding: 8px 16px;
    background: var(--white);
    border: 2px solid var(--primary);
    border-radius: 8px;
    color: var(--gray-800);
    font-weight: 600;
    font-size: 1.1rem;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(248, 93, 65, 0.1);
}

/* Placeholder text styling */
.blank-input input::placeholder {
    color: var(--gray-400);
}

/* Focus state - when user clicks into input field */
.blank-input input:focus {
    outline: none;
    border-color: var(--primary-dark);
    background: var(--primary-light);
    color: var(--white);
    box-shadow: 0 4px 8px rgba(248, 93, 65, 0.2);
}

/* Placeholder text when input is focused */
.blank-input input:focus::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

/* Correct answer state for input fields */
.blank-input.correct input {
    background: var(--success);
    border-color: var(--success);
    color: var(--white);
}

/* Incorrect answer state for input fields */
.blank-input.incorrect input {
    background: var(--error);
    border-color: var(--error);
    color: var(--white);
}

/* ─────────────────────────────────────────────────────────────────
   Word Bank - Draggable word options for fill-in-the-blank
   ───────────────────────────────────────────────────────────────── */

.word-bank {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin: 1.5rem 0;
    padding: 1.5rem;
    background: var(--gray-50);
    border-radius: 12px;
    border: 2px solid var(--gray-200);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

/* Individual word buttons in the word bank */
.word-bank .word {
    padding: 10px 20px;
    background: var(--white);
    border: 2px solid var(--gray-300);
    border-radius: 20px;
    color: var(--gray-700);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    user-select: none;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
}

/* Hover state for word buttons */
.word-bank .word:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(248, 93, 65, 0.2);
}

/* Used/disabled state - word already placed in a blank */
.word-bank .word.used {
    opacity: 0.4;
    cursor: not-allowed;
    background: var(--gray-200);
    border-color: var(--gray-300);
    transform: scale(0.95);
}

/* Hover state for used words - prevent interaction */
.word-bank .word.used:hover {
    transform: scale(0.95);
    background: var(--gray-200);
    color: var(--gray-500);
}

/* END OF FILL-IN-THE-BLANK SECTION - DO NOT ADD DUPLICATES BELOW */

/* ═══════════════════════════════════════════════════════════════
   RESPONSIVE DESIGN - OLD (from before fill-in-the-blank redesign)
   ═══════════════════════════════════════════════════════════════ */

/* Responsive design */
@media (max-width: 768px) {
    .sentence-blank {
        font-size: 1.1rem;
        padding: 1rem;
    }
    
    .blank, .blank-input input {
        min-width: 60px;
        height: 36px;
        font-size: 1rem;
    }
    
    .word-bank {
        padding: 0.75rem;
    }
    
    .word-bank .word {
        padding: 6px 12px;
        font-size: 0.9rem;
    }
}

/* ═══════════════════════════════════════════════════════════════
   ANIMATIONS - For fill-in-the-blank exercises
   ═══════════════════════════════════════════════════════════════
   These animations are used by the fill-in-the-blank section above.
   DO NOT duplicate these - they are the ONLY animation definitions!
   ═══════════════════════════════════════════════════════════════ */

/* Rainbow shimmer effect for sentence container top border */
@keyframes rainbowShimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* Pulsing glow effect for blank element borders */
@keyframes borderGlow {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.8; }
}

/* Celebration animation for correct answers - bouncy scale and rotate */
@keyframes correctCelebration {
    0% { transform: scale(1) rotate(0deg); }
    25% { transform: scale(1.15) rotate(-3deg); }
    50% { transform: scale(1.2) rotate(3deg); }
    75% { transform: scale(1.15) rotate(-2deg); }
    100% { transform: scale(1) rotate(0deg); }
}

/* Shake animation for incorrect answers - horizontal vibration */
@keyframes incorrectShake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-10px); }
    20%, 40%, 60%, 80% { transform: translateX(10px); }
}

/* ═══════════════════════════════════════════════════════════════
   RESPONSIVE DESIGN - Mobile optimizations for fill-in-the-blank
   ═══════════════════════════════════════════════════════════════ */

@media (max-width: 768px) {
    .sentence-blank {
        font-size: 1.3rem;
        padding: 2rem;
        line-height: 2.2;
    }
    
    .blank, .blank-input input {
        min-width: 100px;
        height: 50px;
        font-size: 1.2rem;
        padding: 14px 18px;
    }
    
    .word-bank {
        padding: 1.2rem;
        gap: 10px;
    }
    
    .word-bank .word {
        padding: 10px 18px;
        font-size: 0.95rem;
    }
}

/* ========================================
   DAILY QUIZ CALENDAR STYLES
   ======================================== 
   
   These styles are specific to the daily quiz calendar feature.
   They extend the existing lesson-quiz styles with calendar UI,
   streak tracking, and daily challenge elements.
*/

/* Daily Quiz Body Override */
.daily-quiz-body {
    background: linear-gradient(135deg, #fef7f0 0%, #fff5e6 25%, #f0f9ff 50%, #fef3c7 75%, #fef2f2 100%);
    min-height: 100vh;
}

/* Daily Header */
.daily-header {
    background: var(--white);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 100;
}

.daily-header .page-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--gray-800);
    flex: 1;
    text-align: center;
}

/* Daily Main Container */
.daily-main {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-8) var(--spacing-6);
}

/* ========================================
   STREAK STATISTICS
   ======================================== */

.streak-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-8);
}

.stat-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-6);
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    box-shadow: var(--shadow-md);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.stat-card .stat-icon {
    font-size: var(--font-size-4xl);
}

.stat-card .stat-info {
    flex: 1;
}

.stat-card .stat-value {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--primary);
    display: block;
}

.stat-card .stat-label {
    font-size: var(--font-size-sm);
    color: var(--gray-600);
    display: block;
}

/* ========================================
   CALENDAR CONTAINER
   ======================================== */

.calendar-container {
    background: var(--white);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-8);
    box-shadow: var(--shadow-lg);
}

/* Calendar Header with Month Navigation */
.calendar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-6);
}

.calendar-month {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--gray-800);
}

.month-nav-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-lg);
    border: 2px solid var(--gray-200);
    background: var(--white);
    color: var(--gray-600);
    font-size: var(--font-size-xl);
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.month-nav-btn:hover {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
    transform: scale(1.05);
}

/* ========================================
   CALENDAR GRID
   ======================================== */

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: var(--spacing-3);
}

.day-label {
    text-align: center;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--gray-600);
    padding: var(--spacing-2);
}

.calendar-day {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    background: var(--gray-50);
    color: var(--gray-400);
}

.calendar-day.empty {
    background: transparent;
    cursor: default;
}

/* Calendar Day States */
.calendar-day.future {
    background: var(--gray-100);
    color: var(--gray-400);
    cursor: not-allowed;
}

.calendar-day.available {
    background: var(--white);
    color: var(--gray-700);
    border: 2px solid var(--gray-200);
}

.calendar-day.available:hover {
    background: var(--primary-light);
    color: var(--white);
    border-color: var(--primary);
    transform: scale(1.05);
}

/* Completed Day - Orange */
.calendar-day.completed {
    background: var(--primary);
    color: var(--white);
    border: 2px solid var(--primary-dark);
}

.calendar-day.completed::after {
    content: '✓';
    position: absolute;
    bottom: 2px;
    right: 4px;
    font-size: 0.7rem;
}

/* Missed Day - Grey */
.calendar-day.missed {
    background: var(--gray-300);
    color: var(--gray-600);
    border: 2px solid var(--gray-400);
}

/* Today Highlight */
.calendar-day.today {
    border: 3px solid var(--primary);
    box-shadow: 0 0 0 3px rgba(248, 93, 65, 0.2);
}

.calendar-day.today.available {
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    color: var(--white);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 0 3px rgba(248, 93, 65, 0.2);
    }
    50% {
        box-shadow: 0 0 0 6px rgba(248, 93, 65, 0.4);
    }
}

/* ========================================
   CALENDAR LEGEND
   ======================================== */

.calendar-legend {
    display: flex;
    justify-content: center;
    gap: var(--spacing-6);
    margin-top: var(--spacing-6);
    padding-top: var(--spacing-6);
    border-top: 1px solid var(--gray-200);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-sm);
    color: var(--gray-600);
}

.legend-box {
    width: 20px;
    height: 20px;
    border-radius: var(--radius-sm);
}

.legend-box.completed {
    background: var(--primary);
}

.legend-box.missed {
    background: var(--gray-300);
}

.legend-box.today {
    border: 3px solid var(--primary);
    background: var(--white);
}

.legend-box.future {
    background: var(--gray-100);
}

/* ========================================
   QUIZ CONTAINER (Daily Quiz Specific)
   ======================================== */

.quiz-container {
    background: var(--white);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-8);
    box-shadow: var(--shadow-lg);
}

/* Quiz Header */
.quiz-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-6);
    flex-wrap: wrap;
}

.back-to-calendar-btn {
    padding: var(--spacing-2) var(--spacing-4);
    background: var(--gray-100);
    border: none;
    border-radius: var(--radius-lg);
    color: var(--gray-700);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-base);
}

.back-to-calendar-btn:hover {
    background: var(--gray-200);
}

.quiz-date {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--gray-800);
    flex: 1;
}

.quiz-progress {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.quiz-progress .progress-bar {
    width: 200px;
    height: 8px;
    background: var(--gray-200);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.quiz-progress .progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    border-radius: var(--radius-full);
    transition: width 0.3s ease;
}

.quiz-progress .progress-text {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--gray-600);
    white-space: nowrap;
}

/* Quiz Cards */
.quiz-cards {
    min-height: 400px;
}

.quiz-card {
    background: var(--gray-50);
    border-radius: var(--radius-xl);
    padding: var(--spacing-8);
    display: none;
}

.quiz-card.active {
    display: block;
    animation: slideIn 0.3s ease;
}

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

.question-number {
    font-size: var(--font-size-sm);
    color: var(--primary);
    font-weight: 600;
    margin-bottom: var(--spacing-2);
}

.question-text {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: var(--spacing-6);
}

/* Quiz Options */
.quiz-options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

.quiz-actions {
    display: flex;
    gap: var(--spacing-3);
    margin-top: var(--spacing-6);
}

/* Quiz Complete Screen */
.quiz-complete {
    text-align: center;
    padding: var(--spacing-12) var(--spacing-6);
}

.quiz-complete .complete-content {
    max-width: 600px;
    margin: 0 auto;
}

.quiz-complete .complete-icon {
    font-size: 5rem;
    margin-bottom: var(--spacing-4);
    animation: bounce 1s ease;
}

@keyframes bounce {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.2);
    }
}

.quiz-complete h2 {
    font-size: var(--font-size-3xl);
    color: var(--gray-800);
    margin-bottom: var(--spacing-3);
}

.complete-date {
    font-size: var(--font-size-lg);
    color: var(--gray-600);
    margin-bottom: var(--spacing-6);
}

.quiz-complete .complete-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-6);
}

.quiz-complete .complete-stats .stat-item {
    background: var(--gray-50);
    padding: var(--spacing-4);
    border-radius: var(--radius-lg);
}

.quiz-complete .complete-stats .stat-label {
    font-size: var(--font-size-sm);
    color: var(--gray-600);
    display: block;
    margin-bottom: var(--spacing-1);
}

.quiz-complete .complete-stats .stat-value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--primary);
    display: block;
}

/* Streak Update Animation */
.streak-update {
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    color: var(--white);
    padding: var(--spacing-6);
    border-radius: var(--radius-xl);
    margin-bottom: var(--spacing-6);
}

.streak-update .streak-icon {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-2);
}

.streak-update .streak-message {
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.streak-update .streak-message span {
    font-size: var(--font-size-2xl);
    font-weight: 700;
}

.quiz-complete .complete-actions {
    display: flex;
    gap: var(--spacing-3);
    justify-content: center;
    flex-wrap: wrap;
}

/* ========================================
   DAILY QUIZ RESPONSIVE DESIGN
   ======================================== */

@media (max-width: 768px) {
    .daily-header .header-content {
        flex-wrap: wrap;
    }
    
    .daily-header .page-title {
        order: 3;
        width: 100%;
        margin-top: var(--spacing-2);
    }
    
    .streak-stats {
        grid-template-columns: 1fr;
    }
    
    .calendar-grid {
        gap: var(--spacing-2);
    }
    
    .calendar-day {
        font-size: var(--font-size-sm);
    }
    
    .calendar-legend {
        flex-wrap: wrap;
        gap: var(--spacing-4);
    }
    
    .quiz-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .quiz-date {
        text-align: center;
    }
    
    .quiz-progress .progress-bar {
        width: 100%;
    }
    
    .quiz-complete .complete-stats {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .daily-main {
        padding: var(--spacing-4);
    }
    
    .calendar-container,
    .quiz-container {
        padding: var(--spacing-4);
    }
    
    .calendar-month {
        font-size: var(--font-size-xl);
    }
    
    .home-text {
        display: none;
    }
}