/* ========================================
   MATHAPP - Bright Kids Theme
   Design coloré et ludique pour enfants
   ======================================== */

@import url('https://fonts.googleapis.com/css2?family=Fredoka:wght@300;400;500;600;700&family=Nunito:wght@300;400;500;600;700;800&family=Comic+Neue:wght@300;400;700&display=swap');

:root {
    /* Bright & Fun Backgrounds */
    --bg-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --bg-secondary: #f8fafc;
    --bg-card: #ffffff;
    --bg-card-hover: #f1f5f9;
    --bg-accent: linear-gradient(135deg, #ff9a9e 0%, #fecfef 50%, #fecfef 100%);

    /* Vibrant Kid-Friendly Colors */
    --color-purple: #8b5cf6;
    --color-blue: #3b82f6;
    --color-cyan: #06b6d4;
    --color-teal: #14b8a6;
    --color-green: #10b981;
    --color-yellow: #f59e0b;
    --color-orange: #f97316;
    --color-pink: #ec4899;
    --color-red: #ef4444;
    --color-indigo: #6366f1;

    /* Fun Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-success: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --gradient-warning: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    --gradient-rainbow: linear-gradient(135deg, #ff9a9e 0%, #fecfef 20%, #fecfef 40%, #a8edea 60%, #fed6e3 80%, #d299c2 100%);
    --gradient-fun: linear-gradient(45deg, #ff6b6b, #4ecdc4, #45b7d1, #96ceb4, #feca57, #ff9ff3);

    /* Text Colors - CORRECTION */
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-tertiary: #64748b;
    --text-white: #ffffff;
    --text-muted: #94a3b8;

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;

    /* Typography */
    --font-display: 'Fredoka', cursive, sans-serif;
    --font-body: 'Nunito', sans-serif;
    --font-fun: 'Comic Neue', cursive, sans-serif;

    /* Border radius */
    --radius-sm: 12px;
    --radius-md: 20px;
    --radius-lg: 28px;
    --radius-xl: 36px;
    --radius-full: 50px;

    /* Shadows & Effects */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 12px 48px rgba(0, 0, 0, 0.25);
    --shadow-colorful: 0 8px 32px rgba(102, 126, 234, 0.3);
    --glow-fun: 0 0 30px rgba(255, 154, 158, 0.4);

    /* Transitions */
    --transition: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 400ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* === RESET === */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

/* Background fun et coloré */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 20% 20%, rgba(255, 154, 158, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(79, 172, 254, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 60%, rgba(16, 185, 129, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 60% 40%, rgba(245, 158, 11, 0.08) 0%, transparent 50%);
    z-index: -1;
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    33% { transform: translateY(-10px) rotate(1deg); }
    66% { transform: translateY(5px) rotate(-1deg); }
}

/* === HEADER === */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 3px solid transparent;
    border-image: var(--gradient-fun) 1;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.25rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
}

.logo-icon {
    font-size: 1.5rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

.logo-text {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: #667eea;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

.nav {
    display: flex;
    gap: var(--space-sm);
}

.nav-link {
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition-bounce);
    position: relative;
    overflow: hidden;
}

.nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--gradient-rainbow);
    transition: var(--transition);
    z-index: -1;
}

.nav-link:hover::before,
.nav-link.active::before {
    left: 0;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-colorful);
}

/* === MAIN CONTENT === */
.main-content {
    min-height: calc(100vh - 80px);
}

.page {
    display: none;
    animation: fadeInUp 0.6s ease-out;
}

.page.active {
    display: block;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* === HERO SECTION === */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: var(--space-md) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '🌟✨🎈🎨🚀⭐🌈🎯';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    font-size: 2rem;
    opacity: 0.05;
    animation: float-icons 25s linear infinite;
    white-space: nowrap;
}

@keyframes float-icons {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-title {
    font-family: var(--font-body);
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    font-weight: 800;
    color: #ffffff;
    margin-bottom: var(--space-sm);
    text-shadow: none;
    line-height: 1.4;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

.hero-subtitle {
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    color: #ffffff;
    margin-bottom: var(--space-md);
    text-shadow: none;
    line-height: 1.5;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-buttons {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}
        radial-gradient(circle at 50% 50%, rgba(52, 211, 153, 0.04) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

/* Floating sparkles */
body::after {
    content: '✨ 💫 ⭐ ✨ 💫 ⭐';
    position: fixed;
    top: -50px;
    left: 0;
    width: 100%;
    font-size: 1.5rem;
    opacity: 0.15;
    animation: float 20s linear infinite;
    pointer-events: none;
    z-index: 0;
}

@keyframes float {
    from {
        transform: translateY(0) translateX(0);
    }

    to {
        transform: translateY(100vh) translateX(100px);
    }
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.3;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
    position: relative;
    z-index: 1;
}

/* === HEADER === */
.header {
    position: sticky;
    top: 0;
    background: rgba(26, 26, 46, 0.95);
    backdrop-filter: blur(10px);
    padding: var(--space-md) 0;
    z-index: 1000;
    box-shadow: var(--shadow-md);
    border-bottom: 2px solid rgba(167, 139, 250, 0.2);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    transition: transform var(--transition);
    cursor: pointer;
}

.logo:hover {
    transform: scale(1.05) rotate(-2deg);
}

.logo-icon {
    font-size: 2.5rem;
    filter: drop-shadow(0 0 8px rgba(167, 139, 250, 0.5));
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.08);
    }
}

.logo-text {
    font-size: 2rem;
    font-weight: 800;
    background: var(--gradient-rainbow);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav {
    display: flex;
    gap: var(--space-sm);
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-lg);
    font-weight: 700;
    font-size: 0.95rem;
    transition: all var(--transition);
    background: var(--bg-card);
    border: 2px solid transparent;
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--bg-card-hover);
    transform: translateY(-2px);
    border-color: var(--soft-cyan);
}

.nav-link.active {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--glow-purple);
    position: relative;
}

.nav-link.active::before {
    content: '⭐';
    position: absolute;
    top: -10px;
    right: -5px;
    font-size: 1.2rem;
    animation: spin 3s linear infinite;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

/* === PAGES === */
.main-content {
    min-height: calc(100vh - 80px);
    padding: var(--space-xl) 0;
}

.page {
    display: none;
    animation: slideIn 0.5s ease;
}

.page.active {
    display: block;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* === HERO === */



/* === BUTTONS === */
.btn {
    padding: var(--space-md) var(--space-lg);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    font-size: 1.05rem;
    font-weight: 700;
    font-family: var(--font-display);
    cursor: pointer;
    transition: all var(--transition);
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    transform: translate(-50%, -50%);
    transition: width 0.5s, height 0.5s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: var(--shadow-md);
}

.btn:active {
    transform: translateY(-1px) scale(1.02);
}

.btn span {
    position: relative;
    z-index: 1;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--glow-purple);
}

.btn-primary:hover {
    box-shadow: 0 8px 24px rgba(167, 139, 250, 0.5);
}

.btn-secondary {
    background: var(--gradient-secondary);
    color: white;
    box-shadow: var(--glow-cyan);
}

.btn-secondary:hover {
    box-shadow: 0 8px 24px rgba(34, 211, 238, 0.5);
}

.btn-small {
    padding: var(--space-sm) var(--space-md);
    font-size: 0.95rem;
    background: var(--gradient-accent);
    color: white;
}

.btn-level {
    background: var(--bg-card);
    color: var(--text-secondary);
    padding: var(--space-sm) var(--space-lg);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-level.active {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--glow-purple);
}

.btn-success {
    background: linear-gradient(135deg, var(--soft-green), var(--soft-teal));
    color: white;
}

.btn-error {
    background: linear-gradient(135deg, #F87171, #EF4444);
    color: white;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* === CARDS === */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.cards-grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: all var(--transition);
    box-shadow: var(--shadow-sm);
    border: 2px solid transparent;
    position: relative;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg), var(--glow-multi);
    border-color: var(--soft-purple);
    background: var(--bg-card-hover);
}

.feature-card {
    cursor: pointer;
    text-align: center;
}

.card-icon {
    font-size: 3.5rem;
    margin-bottom: var(--space-md);
    display: inline-block;
    filter: drop-shadow(0 0 10px rgba(96, 165, 250, 0.4));
    animation: bounce 3s ease-in-out infinite;
}

@keyframes bounce {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-8px);
    }
}

.card-title {
    font-size: 1.6rem;
    margin-bottom: var(--space-sm);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
}

.card-description {
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    line-height: 1.7;
    font-weight: 600;
}

/* === SECTIONS === */
.features {
    margin-bottom: var(--space-xl);
}

.section-title {
    font-size: 2.2rem;
    margin-bottom: var(--space-lg);
    text-align: center;
    background: var(--gradient-rainbow);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 900;
}

.page-title {
    font-size: 2.8rem;
    margin-bottom: var(--space-xl);
    text-align: center;
    background: var(--gradient-rainbow);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 900;
}

/* === THEORY === */
.level-selector {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    margin-bottom: var(--space-xl);
    flex-wrap: wrap;
}

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

.topic-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    cursor: pointer;
    transition: all var(--transition);
    box-shadow: var(--shadow-sm);
    border: 2px solid transparent;
}

.topic-card:hover {
    box-shadow: var(--shadow-md), var(--glow-cyan);
    background: var(--bg-card-hover);
    border-color: var(--soft-cyan);
    transform: translateX(5px);
}

.topic-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.topic-title {
    font-size: 1.6rem;
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.topic-expand {
    font-size: 1.8rem;
    transition: transform var(--transition);
    color: var(--soft-cyan);
}

.topic-card.expanded .topic-expand {
    transform: rotate(180deg);
    color: var(--soft-purple);
}

.topic-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease;
}

.topic-card.expanded .topic-content {
    max-height: 3000px;
    margin-top: var(--space-md);
}

.example {
    background: rgba(52, 211, 153, 0.1);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    margin: var(--space-md) 0;
    border-left: 4px solid var(--soft-green);
    border-right: 4px solid var(--soft-teal);
}

.example-title {
    color: var(--soft-cyan);
    font-weight: 700;
    margin-bottom: var(--space-sm);
    font-size: 1.1rem;
}

.step {
    margin: var(--space-sm) 0;
    padding-left: var(--space-md);
    color: var(--text-secondary);
    font-weight: 600;
}



.hints-container {
    margin-top: var(--space-lg);
    text-align: left;
}

.hint {
    background: rgba(251, 191, 36, 0.15);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-sm);
    border-left: 4px solid var(--soft-yellow);
    border-right: 4px solid var(--soft-orange);
    font-weight: 600;
}

.solution {
    background: rgba(34, 211, 238, 0.1);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    margin-top: var(--space-md);
    text-align: left;
    border: 2px solid var(--soft-cyan);
}

.solution-title {
    color: var(--soft-cyan);
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

/* === PROGRESS === */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.stat-card {
    background: var(--bg-card);
    padding: var(--space-xl) var(--space-lg);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-rainbow);
}

.stat-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg), var(--glow-multi);
    border-color: var(--soft-purple);
}

.stat-value {
    font-size: 3rem;
    font-weight: 900;
    background: var(--gradient-rainbow);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-xs);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.progress-bar-container {
    margin: var(--space-md) 0;
}

.progress-bar {
    background: var(--bg-secondary);
    height: 16px;
    border-radius: 100px;
    overflow: hidden;
    border: 2px solid rgba(167, 139, 250, 0.3);
}

.progress-bar-fill {
    height: 100%;
    background: var(--gradient-rainbow);
    border-radius: 100px;
    transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    box-shadow: 0 0 15px rgba(96, 165, 250, 0.4);
}

.progress-bar-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% {
        transform: translateX(-100%);
    }

    100% {
        transform: translateX(100%);
    }
}

/* === TOAST === */
.toast {
    position: fixed;
    bottom: var(--space-lg);
    right: var(--space-lg);
    background: var(--bg-card);
    color: var(--text-primary);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg), var(--glow-cyan);
    transform: translateY(200px);
    opacity: 0;
    transition: all var(--transition);
    z-index: 2000;
    font-weight: 600;
    border: 2px solid var(--soft-cyan);
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

/* === MODAL === */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    z-index: 3000;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
}

.modal.show {
    display: flex;
}

.modal-content {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    max-width: 650px;
    width: 100%;
    max-height: 85vh;
    overflow-y: auto;
    position: relative;
    animation: modalBounce 0.5s ease;
    box-shadow: var(--shadow-lg), var(--glow-purple);
    border: 3px solid var(--soft-purple);
}

@keyframes modalBounce {
    0% {
        opacity: 0;
        transform: scale(0.7) translateY(-50px);
    }

    50% {
        transform: scale(1.05);
    }

    100% {
        opacity: 1;
        transform: scale(1);
    }
}

.modal-close {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    background: var(--bg-secondary);
    border: 2px solid var(--soft-purple);
    color: var(--text-primary);
    font-size: 1.5rem;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
}

.modal-close:hover {
    background: var(--gradient-primary);
    color: white;
    transform: rotate(90deg) scale(1.2);
    box-shadow: var(--glow-purple);
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
    .nav {
        gap: var(--space-xs);
    }

    .nav-link {
        padding: var(--space-xs) var(--space-sm);
        font-size: 0.85rem;
    }

    .hero {
        padding: var(--space-lg);
    }

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

    .exercise-question {
        font-size: 1.6rem;
    }
}

@media (max-width: 480px) {
    .logo-text {
        font-size: 1.5rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }
}

/* === BUTTONS === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-sm) var(--space-lg);
    border: none;
    border-radius: var(--radius-full);
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-bounce);
    position: relative;
    overflow: hidden;
    min-height: 48px;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: var(--transition);
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: var(--shadow-xl);
}

.btn:active {
    transform: translateY(-1px) scale(1.02);
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--text-white);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--gradient-secondary);
    color: var(--text-white);
    box-shadow: var(--shadow-md);
}

.btn-success {
    background: var(--gradient-success);
    color: var(--text-white);
    box-shadow: var(--shadow-md);
}

.btn-warning {
    background: var(--gradient-warning);
    color: var(--text-primary);
    box-shadow: var(--shadow-md);
}

.btn-small {
    padding: var(--space-xs) var(--space-md);
    font-size: 0.875rem;
    min-height: 36px;
    background: var(--gradient-primary);
    color: var(--text-white);
    border: none;
}

.btn-level {
    background: var(--bg-card);
    color: var(--text-secondary);
    border: 2px solid transparent;
    box-shadow: var(--shadow-sm);
}

.btn-level:hover {
    background: var(--bg-card-hover);
    border-color: var(--color-blue);
}

.btn-level.active {
    background: var(--gradient-primary);
    color: var(--text-white);
    border-color: transparent;
}

/* === CARDS === */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-md);
    margin-top: var(--space-lg);
}

.cards-grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-md);
    box-shadow: var(--shadow-md);
    transition: var(--transition-bounce);
    position: relative;
    overflow: hidden;
    border: 2px solid transparent;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-rainbow);
}

.card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-xl);
    border-color: rgba(102, 126, 234, 0.3);
}

.feature-card {
    cursor: pointer;
    text-align: center;
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-sm);
    display: block;
    animation: wiggle 2s ease-in-out infinite;
}

@keyframes wiggle {
    0%, 7% { transform: rotateZ(0); }
    15% { transform: rotateZ(-15deg); }
    20% { transform: rotateZ(10deg); }
    25% { transform: rotateZ(-10deg); }
    30% { transform: rotateZ(6deg); }
    35% { transform: rotateZ(-4deg); }
    40%, 100% { transform: rotateZ(0); }
}

.card-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.card-description {
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    line-height: 1.6;
}

/* === SECTIONS === */
.features {
    margin: var(--space-lg) 0;
}

.section-title {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--space-md);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--gradient-rainbow);
    border-radius: 2px;
}

.page-title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--space-lg);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    padding: var(--space-sm) 0;
}

/* === THEORY PAGE === */
.level-selector {
    display: flex;
    justify-content: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
}

.theory-content {
    max-width: 800px;
    margin: 0 auto;
}

.topic-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-md);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: var(--transition-bounce);
    border: 2px solid transparent;
}

.topic-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: rgba(102, 126, 234, 0.3);
}

.topic-header {
    padding: var(--space-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(244, 114, 182, 0.1) 100%);
    cursor: pointer;
    transition: var(--transition);
}

.topic-header:hover {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.2) 0%, rgba(244, 114, 182, 0.2) 100%);
}

.topic-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.topic-expand {
    font-size: 1.5rem;
    color: var(--color-blue);
    transition: var(--transition-bounce);
}

.topic-card.expanded .topic-expand {
    transform: rotate(180deg);
}

.topic-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease-out;
}

.topic-card.expanded .topic-content {
    max-height: 2000px;
    transition: max-height 0.5s ease-in;
}

.theory-section {
    padding: var(--space-md);
    border-bottom: 1px solid rgba(102, 126, 234, 0.1);
}

.theory-section h3 {
    font-family: var(--font-display);
    color: var(--color-purple);
    margin-bottom: var(--space-md);
}

.theory-section h4 {
    color: var(--color-blue);
    margin: var(--space-md) 0 var(--space-sm) 0;
}

.theory-section ul {
    padding-left: var(--space-lg);
}

.theory-section li {
    margin-bottom: var(--space-xs);
    color: var(--text-secondary);
}

.example {
    padding: var(--space-md);
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.05) 0%, rgba(6, 182, 212, 0.05) 100%);
    border-left: 4px solid var(--color-teal);
    margin-bottom: var(--space-sm);
}

.example-title {
    font-family: var(--font-display);
    font-weight: 600;
    color: var(--color-teal);
    margin-bottom: var(--space-sm);
    font-size: 1.1rem;
}

.step {
    padding: var(--space-xs) var(--space-sm);
    margin: var(--space-xs) 0;
    background: rgba(255, 255, 255, 0.5);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--color-green);
}

/* === PRACTICE PAGE === */
#practice-page .practice-selector {
    background: var(--bg-card) !important;
    border-radius: var(--radius-lg) !important;
    padding: var(--space-md) !important;
    box-shadow: var(--shadow-md) !important;
    max-width: 500px !important;
    margin: 0 auto var(--space-md) auto !important;
    color: var(--text-primary) !important;
    border: 2px solid transparent !important;
}

#practice-page .selector-label {
    display: block !important;
    font-family: var(--font-display) !important;
    font-size: 1.2rem !important;
    font-weight: 600 !important;
    color: var(--text-primary) !important;
    margin-bottom: var(--space-sm) !important;
}

#practice-page .exercise-container {
    background: var(--bg-card) !important;
    border-radius: var(--radius-lg) !important;
    padding: var(--space-md) !important;
    box-shadow: var(--shadow-md) !important;
    max-width: 500px !important;
    margin: 0 auto !important;
    text-align: center !important;
    color: var(--text-primary) !important;
    border: 2px solid transparent !important;
}

#practice-page .exercise-question {
    background: var(--bg-card) !important;
    color: var(--text-primary) !important;
    border: 3px solid var(--color-blue) !important;
    padding: var(--space-md) !important;
    border-radius: var(--radius-md) !important;
    font-size: 1.5rem !important;
    font-weight: 600 !important;
    text-align: center !important;
    margin: var(--space-md) 0 !important;
    box-shadow: var(--shadow-sm) !important;
    font-family: var(--font-display) !important;
}

#practice-page .selector-group {
    margin-bottom: var(--space-md) !important;
}

#practice-page .selector-buttons {
    display: flex !important;
    gap: var(--space-sm) !important;
    flex-wrap: wrap !important;
}

#practice-page .exercise-buttons {
    display: flex !important;
    gap: var(--space-sm) !important;
    justify-content: center !important;
    flex-wrap: wrap !important;
    margin-bottom: var(--space-md) !important;
}

#practice-page .exercise-feedback {
    padding: var(--space-md) !important;
    border-radius: var(--radius-md) !important;
    font-weight: 600 !important;
    font-size: 1.1rem !important;
    margin-bottom: var(--space-md) !important;
    animation: slideInUp 0.5s ease-out !important;
}

#practice-page .exercise-feedback.correct {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.2) 0%, rgba(6, 182, 212, 0.2) 100%) !important;
    color: #059669 !important;
    border: 2px solid var(--color-green) !important;
}

#practice-page .exercise-feedback.incorrect {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.2) 0%, rgba(245, 158, 11, 0.2) 100%) !important;
    color: #dc2626 !important;
    border: 2px solid var(--color-red) !important;
}

#practice-page .hints-container {
    text-align: left !important;
}

#practice-page .exercise-input {
    width: 250px !important;
    max-width: 100% !important;
    padding: var(--space-sm) !important;
    font-size: 1.25rem !important;
    font-weight: 600 !important;
    text-align: center !important;
    border: 3px solid var(--color-blue) !important;
    border-radius: var(--radius-sm) !important;
    background: var(--bg-card) !important;
    color: var(--text-primary) !important;
    margin-bottom: var(--space-md) !important;
    transition: var(--transition-bounce) !important;
}

#practice-page .exercise-input:focus {
    outline: none !important;
    border-color: var(--color-purple) !important;
    box-shadow: 0 0 0 4px rgba(139, 92, 246, 0.2) !important;
    transform: scale(1.05) !important;
}

.exercise-input:focus {
    outline: none;
    border-color: var(--color-purple);
    box-shadow: 0 0 0 4px rgba(139, 92, 246, 0.2);
    transform: scale(1.05);
}

.exercise-buttons {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--space-lg);
}

.exercise-feedback {
    padding: var(--space-md);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: var(--space-md);
    animation: slideInUp 0.5s ease-out;
}

.exercise-feedback.correct {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.2) 0%, rgba(6, 182, 212, 0.2) 100%);
    color: #059669;
    border: 2px solid var(--color-green);
}

.exercise-feedback.incorrect {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.2) 0%, rgba(245, 158, 11, 0.2) 100%);
    color: #dc2626;
    border: 2px solid var(--color-red);
}

.hints-container {
    text-align: left;
}

.hint {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1) 0%, rgba(249, 115, 22, 0.1) 100%);
    border: 2px solid var(--color-yellow);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    margin-bottom: var(--space-sm);
    color: #92400e;
}

/* === PROGRESS PAGE === */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.stat-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-md);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition-bounce);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-fun);
}

.stat-card:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

.stat-value {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-xs);
}

.stat-label {
    color: var(--text-secondary);
    font-weight: 600;
}

.progress-bar-container {
    width: 100%;
    height: 12px;
    background: rgba(102, 126, 234, 0.1);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-top: var(--space-sm);
}

.progress-bar-fill {
    height: 100%;
    background: var(--gradient-success);
    border-radius: var(--radius-full);
    transition: width 1s ease-out;
    position: relative;
}

.progress-bar-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* === MODAL === */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    backdrop-filter: blur(5px);
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    max-width: 90vw;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    box-shadow: var(--shadow-xl);
    animation: slideInUp 0.3s ease-out;
}

.modal-close {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    background: var(--color-red);
    color: white;
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition-bounce);
}

.modal-close:hover {
    transform: scale(1.1) rotate(90deg);
    background: var(--color-pink);
}

/* === TOAST === */
.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--gradient-success);
    color: white;
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-lg);
    transform: translateX(400px);
    transition: var(--transition-bounce);
    z-index: 1001;
    font-weight: 600;
}

.toast.show {
    transform: translateX(0);
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: var(--space-md);
    }
    
    .nav {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .cards-grid {
        grid-template-columns: 1fr;
    }
    
    .exercise-buttons {
        flex-direction: column;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-sm);
    }
    
    .hero {
        padding: var(--space-xl) 0;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .selector-buttons {
        flex-direction: column;
    }
}

/* === ANIMATIONS SUPPLÉMENTAIRES === */
@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

@keyframes rainbow {
    0% { filter: hue-rotate(0deg); }
    100% { filter: hue-rotate(360deg); }
}

.animate-pulse {
    animation: pulse 2s infinite;
}

.animate-rainbow {
    animation: rainbow 3s linear infinite;
}

/* Effet de particules pour les succès */
.success-particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 999;
}

.particle {
    position: absolute;
    font-size: 2rem;
    animation: particle-float 3s ease-out forwards;
}

@keyframes particle-float {
    0% {
        opacity: 1;
        transform: translateY(0) rotate(0deg);
    }
    100% {
        opacity: 0;
        transform: translateY(-200px) rotate(360deg);
    }
}
/* === RIPPLE EFFECT === */
@keyframes ripple {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

/* === ENHANCED ANIMATIONS === */
@keyframes wiggle-more {
    0%, 7% { transform: rotateZ(0) scale(1); }
    15% { transform: rotateZ(-15deg) scale(1.1); }
    20% { transform: rotateZ(10deg) scale(1.05); }
    25% { transform: rotateZ(-10deg) scale(1.1); }
    30% { transform: rotateZ(6deg) scale(1.05); }
    35% { transform: rotateZ(-4deg) scale(1.02); }
    40%, 100% { transform: rotateZ(0) scale(1); }
}

@keyframes bounce-in {
    0% {
        opacity: 0;
        transform: scale(0.3) translateY(50px);
    }
    50% {
        opacity: 1;
        transform: scale(1.05) translateY(-10px);
    }
    70% {
        transform: scale(0.9) translateY(0px);
    }
    100% {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

@keyframes glow {
    0%, 100% { box-shadow: 0 0 5px rgba(102, 126, 234, 0.5); }
    50% { box-shadow: 0 0 20px rgba(102, 126, 234, 0.8), 0 0 30px rgba(244, 114, 182, 0.6); }
}

/* === SPECIAL EFFECTS FOR KIDS === */
.card-icon:hover {
    animation: wiggle-more 1s ease-in-out;
}

.btn:active {
    animation: bounce-in 0.3s ease-out;
}

.exercise-input.animate-pulse {
    animation: glow 1s ease-in-out 3;
}

.incorrect-shake {
    animation: shake 0.5s ease-in-out;
}

/* === FLOATING ELEMENTS === */
.floating-math-symbols {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
    overflow: hidden;
}

.floating-symbol {
    position: absolute;
    font-size: 2rem;
    opacity: 0.1;
    animation: float-symbol 15s linear infinite;
}

@keyframes float-symbol {
    0% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 0.1;
    }
    90% {
        opacity: 0.1;
    }
    100% {
        transform: translateY(-100px) rotate(360deg);
        opacity: 0;
    }
}

/* === PROGRESS CELEBRATIONS === */
.celebration-burst {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 4rem;
    z-index: 1000;
    pointer-events: none;
    animation: celebration-burst 2s ease-out forwards;
}

@keyframes celebration-burst {
    0% {
        opacity: 0;
        transform: translate(-50%, -50%) scale(0);
    }
    20% {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1.2);
    }
    100% {
        opacity: 0;
        transform: translate(-50%, -50%) scale(2) translateY(-100px);
    }
}

/* === ENHANCED HOVER EFFECTS === */
.nav-link:hover {
    animation: bounce 0.6s ease-in-out;
}

.feature-card:hover .card-icon {
    animation: wiggle-more 1s ease-in-out;
}

.btn:hover {
    animation: pulse 0.8s ease-in-out infinite;
}

/* === LOADING STATES === */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* === ACCESSIBILITY IMPROVEMENTS === */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* === PRINT STYLES === */
@media print {
    .header,
    .nav,
    .btn,
    .modal,
    .toast {
        display: none !important;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
    
    .card {
        border: 1px solid #ccc !important;
        box-shadow: none !important;
    }
}
/* === CORRECTION URGENTE LISIBILITÉ EXERCICES === */
/* Correction spécifique et ciblée pour les exercices uniquement */

/* === FORCE STYLES FOR PRACTICE PAGE === */
/* Règles ultra-spécifiques pour surcharger tous les autres styles */

#practice-content div.practice-selector,
#practice-content .practice-selector,
div.practice-selector {
    background: var(--bg-card) !important;
    color: var(--text-primary) !important;
    border: 2px solid rgba(102, 126, 234, 0.2) !important;
    border-radius: var(--radius-lg) !important;
    padding: var(--space-md) !important;
    box-shadow: var(--shadow-md) !important;
    max-width: 500px !important;
    margin: 0 auto var(--space-md) auto !important;
}

#practice-content label.selector-label,
#practice-content .selector-label,
label.selector-label {
    display: block !important;
    font-family: var(--font-display) !important;
    font-size: 1.2rem !important;
    font-weight: 600 !important;
    color: var(--text-primary) !important;
    margin-bottom: var(--space-sm) !important;
    background: none !important;
    -webkit-text-fill-color: var(--text-primary) !important;
}

#practice-content div.exercise-container,
#practice-content .exercise-container,
div.exercise-container {
    background: var(--bg-card) !important;
    color: var(--text-primary) !important;
    border: 2px solid rgba(102, 126, 234, 0.2) !important;
    border-radius: var(--radius-lg) !important;
    padding: var(--space-md) !important;
    box-shadow: var(--shadow-md) !important;
    max-width: 500px !important;
    margin: 0 auto !important;
    text-align: center !important;
}

#practice-content div.exercise-question,
#practice-content .exercise-question,
div.exercise-question {
    background: var(--bg-secondary) !important;
    color: var(--text-primary) !important;
    border: 3px solid var(--color-blue) !important;
    padding: var(--space-md) !important;
    border-radius: var(--radius-md) !important;
    font-size: 1.5rem !important;
    font-weight: 600 !important;
    text-align: center !important;
    margin: var(--space-md) 0 !important;
    box-shadow: var(--shadow-sm) !important;
    font-family: var(--font-display) !important;
}

#practice-content input.exercise-input,
#practice-content .exercise-input,
input.exercise-input {
    width: 250px !important;
    max-width: 100% !important;
    padding: var(--space-sm) !important;
    font-size: 1.25rem !important;
    font-weight: 600 !important;
    text-align: center !important;
    border: 3px solid var(--color-blue) !important;
    border-radius: var(--radius-sm) !important;
    background: var(--bg-card) !important;
    color: var(--text-primary) !important;
    margin-bottom: var(--space-md) !important;
    transition: var(--transition-bounce) !important;
}

#practice-content input.exercise-input:focus,
#practice-content .exercise-input:focus,
input.exercise-input:focus {
    outline: none !important;
    border-color: var(--color-purple) !important;
    box-shadow: 0 0 0 4px rgba(139, 92, 246, 0.2) !important;
    transform: scale(1.05) !important;
}

/* Styles pour les groupes et boutons */
#practice-content .selector-group,
div.selector-group {
    margin-bottom: var(--space-md) !important;
}

#practice-content .selector-buttons,
div.selector-buttons {
    display: flex !important;
    gap: var(--space-sm) !important;
    flex-wrap: wrap !important;
}

#practice-content .exercise-buttons,
div.exercise-buttons {
    display: flex !important;
    gap: var(--space-sm) !important;
    justify-content: center !important;
    flex-wrap: wrap !important;
    margin-bottom: var(--space-md) !important;
}

/* Styles pour les feedbacks et indices */
#practice-content .exercise-feedback,
div.exercise-feedback {
    padding: var(--space-md) !important;
    border-radius: var(--radius-md) !important;
    font-weight: 600 !important;
    font-size: 1.1rem !important;
    margin-bottom: var(--space-md) !important;
}

#practice-content .exercise-feedback.correct,
div.exercise-feedback.correct {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.2) 0%, rgba(6, 182, 212, 0.2) 100%) !important;
    color: #059669 !important;
    border: 2px solid var(--color-green) !important;
}

#practice-content .exercise-feedback.incorrect,
div.exercise-feedback.incorrect {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.2) 0%, rgba(245, 158, 11, 0.2) 100%) !important;
    color: #dc2626 !important;
    border: 2px solid var(--color-red) !important;
}

#practice-content .hints-container,
div.hints-container {
    text-align: left !important;
}

#practice-content .hint,
div.hint {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1) 0%, rgba(249, 115, 22, 0.1) 100%) !important;
    border: 2px solid var(--color-yellow) !important;
    border-radius: var(--radius-md) !important;
    padding: var(--space-md) !important;
    margin-bottom: var(--space-sm) !important;
    color: #92400e !important;
}
/* === RÈGLE GLOBALE POUR FORCER LES COULEURS DE LA PAGE PRATIQUE === */
#practice-page * {
    color: var(--text-primary) !important;
}

/* ANNULATION : Ne pas forcer le fond blanc sur tous les éléments */
#practice-page div,
#practice-page label,
#practice-page input,
#practice-page button {
    color: var(--text-primary) !important;
}

/* Surcharge spécifique pour les éléments avec des classes */
#practice-page .practice-selector,
#practice-page .exercise-container,
#practice-page .exercise-question,
#practice-page .selector-label {
    background: var(--bg-card) !important;
    color: var(--text-primary) !important;
}
/* === CONTENEUR TRANSPARENT POUR PAGE PRATIQUE === */
#practice-page .container {
    background: transparent !important;
    padding: 0 var(--space-md) !important;
}

#practice-page .main-content {
    background: transparent !important;
}

#practice-page {
    background: transparent !important;
}

/* Assurer que seules les cartes ont un fond blanc */
#practice-page .practice-selector,
#practice-page .exercise-container {
    background: var(--bg-card) !important;
    box-shadow: var(--shadow-md) !important;
}
/* === SUPPRESSION COMPLÈTE DE TOUS LES FONDS BLANCS AUTOUR DES EXERCICES === */
#practice-page,
#practice-page .page,
#practice-page .main-content,
#practice-page .container,
#practice-content {
    background: transparent !important;
    background-color: transparent !important;
}

/* Assurer que le body reste avec son fond par défaut */
body {
    background: var(--bg-secondary) !important;
}

/* Seules les cartes d'exercices gardent leur fond blanc */
#practice-page .practice-selector,
#practice-page .exercise-container,
#practice-content .practice-selector,
#practice-content .exercise-container {
    background: var(--bg-card) !important;
    background-color: var(--bg-card) !important;
}
/* === CIBLAGE ULTRA-SPÉCIFIQUE POUR ÉLIMINER L'ENCADRÉ BLANC === */
section#practice-page {
    background: transparent !important;
    background-color: transparent !important;
}

section#practice-page > div.container {
    background: transparent !important;
    background-color: transparent !important;
    box-shadow: none !important;
    border: none !important;
}

section#practice-page .practice-content {
    background: transparent !important;
    background-color: transparent !important;
    box-shadow: none !important;
    border: none !important;
}

/* Forcer la transparence sur tous les conteneurs intermédiaires */
#practice-page > *,
#practice-page .container > *:not(.practice-selector):not(.exercise-container) {
    background: transparent !important;
    background-color: transparent !important;
}
/* === BOUTON COMMENCER SPÉCIFIQUE === */
#practice-page .btn-success,
#practice-content .btn-success,
.practice-selector .btn-success {
    background: linear-gradient(135deg, #ec4899 0%, #f472b6 100%) !important;
    color: white !important;
    border: none !important;
    box-shadow: 0 4px 16px rgba(236, 72, 153, 0.3) !important;
}

#practice-page .btn-success:hover,
#practice-content .btn-success:hover,
.practice-selector .btn-success:hover {
    background: linear-gradient(135deg, #db2777 0%, #ec4899 100%) !important;
    transform: translateY(-2px) scale(1.02) !important;
    box-shadow: 0 6px 20px rgba(236, 72, 153, 0.4) !important;
}