@import url("responsive-global.css");
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
    /* 🌟 Palette énergisante et motivante */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --success-gradient: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    --energy-gradient: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    --focus-gradient: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
    --power-gradient: linear-gradient(135deg, #ff6b6b 0%, #feca57 100%);
    
    /* 🎨 Couleurs de base lumineuses */
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-accent: linear-gradient(135deg, #e0f2fe 0%, #f3e5f5 100%);
    
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-accent: #0c4a6e;
    
    /* 🔥 Couleurs motivantes */
    --success-color: #10b981;
    --energy-color: #f59e0b;
    --focus-color: #3b82f6;
    --power-color: #ef4444;
    --creative-color: #8b5cf6;
    
    /* ✨ Effets lumineux */
    --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-medium: 0 8px 30px rgba(0, 0, 0, 0.12);
    --shadow-strong: 0 20px 40px rgba(0, 0, 0, 0.15);
    
    --glow-success: 0 0 20px rgba(16, 185, 129, 0.3);
    --glow-energy: 0 0 20px rgba(245, 158, 11, 0.3);
    --glow-focus: 0 0 20px rgba(59, 130, 246, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    position: relative;
    line-height: 1.6;
}

/* 🌈 Arrière-plan énergisant et lumineux */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 25% 25%, rgba(102, 126, 234, 0.1) 0%, transparent 60%),
        radial-gradient(circle at 75% 75%, rgba(245, 158, 11, 0.1) 0%, transparent 60%),
        radial-gradient(circle at 50% 10%, rgba(16, 185, 129, 0.08) 0%, transparent 60%),
        radial-gradient(circle at 10% 90%, rgba(139, 92, 246, 0.08) 0%, transparent 60%);
    animation: energyFlow 25s ease-in-out infinite;
    z-index: -1;
}

@keyframes energyFlow {
    0%, 100% { opacity: 1; transform: scale(1) rotate(0deg); }
    50% { opacity: 0.8; transform: scale(1.05) rotate(0.5deg); }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    position: relative;
}

/* 🎯 Header motivant et énergique */
.header {
    text-align: center;
    background: var(--bg-secondary);
    border: 2px solid transparent;
    background-image: linear-gradient(var(--bg-secondary), var(--bg-secondary)), var(--success-gradient);
    background-origin: border-box;
    background-clip: content-box, border-box;
    border-radius: 24px;
    padding: 3rem 2rem;
    margin-bottom: 3rem;
    box-shadow: var(--shadow-medium);
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 3px;
    background: var(--success-gradient);
    animation: motivationBar 3s ease-in-out infinite;
}

@keyframes motivationBar {
    0% { left: -100%; }
    50% { left: 100%; }
    100% { left: -100%; }
}

.header h1 {
    font-size: 2.75rem;
    font-weight: 800;
    background: var(--primary-gradient);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
    position: relative;
}

.header h1::after {
    content: '💪';
    position: absolute;
    right: -3rem;
    top: 0;
    font-size: 2rem;
    animation: motivationPulse 2s ease-in-out infinite;
}

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

.subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    font-weight: 500;
    background: linear-gradient(135deg, var(--success-color), var(--focus-color));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* 🚀 Cards d'exercices énergisantes */
.exercise {
    background: var(--bg-secondary);
    border: 1px solid rgba(59, 130, 246, 0.1);
    border-radius: 20px;
    margin: 2.5rem 0;
    box-shadow: var(--shadow-soft);
    position: relative;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.exercise::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--energy-gradient);
    opacity: 0.8;
}

.exercise:hover {
    transform: translateY(-6px) scale(1.01);
    box-shadow: var(--shadow-strong), var(--glow-focus);
    border-color: rgba(59, 130, 246, 0.3);
}

.exercise:nth-child(odd)::before {
    background: var(--success-gradient);
}

.exercise:nth-child(even)::before {
    background: var(--power-gradient);
}

/* 🎨 Header d'exercice dynamique */
.exercise-header {
    background: var(--focus-gradient);
    padding: 2rem;
    position: relative;
    font-weight: 700;
    font-size: 1.4rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.exercise-header::before {
    content: '🎯';
    font-size: 1.8rem;
    animation: targetSpin 4s linear infinite;
}

@keyframes targetSpin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.exercise-content {
    padding: 2.5rem;
    position: relative;
}

/* 💡 Texte d'introduction motivant */
.intro-text {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(6, 182, 212, 0.1) 100%);
    border-left: 4px solid var(--success-color);
    color: var(--text-primary);
    padding: 1.75rem;
    border-radius: 16px;
    margin: 2rem 0;
    font-weight: 600;
    position: relative;
    box-shadow: var(--shadow-soft);
}

.intro-text::before {
    content: '🌟';
    position: absolute;
    left: -12px;
    top: 1.5rem;
    background: var(--bg-secondary);
    padding: 8px;
    border-radius: 50%;
    font-size: 1.2rem;
    box-shadow: var(--glow-success);
}

/* 🎲 Questions énergiques */
.question {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.08) 0%, rgba(139, 92, 246, 0.08) 100%);
    border-left: 4px solid var(--focus-color);
    padding: 2rem;
    margin: 2rem 0;
    border-radius: 16px;
    font-weight: 600;
    color: var(--text-primary);
    position: relative;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-soft);
}

.question:hover {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.12) 0%, rgba(139, 92, 246, 0.12) 100%);
    transform: translateX(8px);
    box-shadow: var(--shadow-medium), var(--glow-focus);
}

.question::before {
    content: '🧠';
    position: absolute;
    left: -12px;
    top: 1.5rem;
    background: var(--bg-secondary);
    padding: 8px;
    border-radius: 50%;
    font-size: 1.2rem;
    animation: brainPulse 3s ease-in-out infinite;
}

@keyframes brainPulse {
    0%, 100% { transform: scale(1); filter: brightness(1); }
    50% { transform: scale(1.1); filter: brightness(1.2); }
}

/* 🎮 QCM interactif et fun */
.mcq {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.08) 0%, rgba(251, 191, 36, 0.08) 100%);
    border: 2px solid rgba(245, 158, 11, 0.2);
    padding: 2rem;
    border-radius: 20px;
    margin: 2rem 0;
    position: relative;
    box-shadow: var(--shadow-soft);
}

.mcq::before {
    content: 'CHALLENGE! 🏆';
    position: absolute;
    top: -16px;
    left: 2rem;
    background: var(--energy-gradient);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 25px;
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: var(--glow-energy);
    animation: challengeBounce 2s ease-in-out infinite;
}

@keyframes challengeBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-2px); }
}

.mcq-item {
    margin: 1.25rem 0;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.7);
    border: 2px solid rgba(245, 158, 11, 0.1);
    border-radius: 16px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    position: relative;
    font-weight: 600;
    color: var(--text-primary);
    box-shadow: var(--shadow-soft);
}

.mcq-item:hover {
    background: rgba(255, 255, 255, 0.95);
    border-color: var(--energy-color);
    transform: translateX(12px) scale(1.02);
    box-shadow: var(--shadow-medium), var(--glow-energy);
}

.mcq-item::before {
    content: '⚡';
    position: absolute;
    left: -8px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--energy-gradient);
    padding: 8px;
    border-radius: 50%;
    font-size: 0.9rem;
    opacity: 0;
    transition: all 0.3s ease;
    box-shadow: var(--glow-energy);
}

.mcq-item:hover::before {
    opacity: 1;
    left: -12px;
}

/* 🎯 Boutons motivants et énergiques */
button {
    font-family: 'Inter', sans-serif;
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: 16px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 700;
    margin: 1rem 0.75rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-medium);
    position: relative;
    overflow: hidden;
    text-transform: none;
    letter-spacing: 0.02em;
    min-width: 140px;
}

button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.6s;
}

button:hover {
    transform: translateY(-3px) scale(1.03);
    box-shadow: var(--shadow-strong);
}

button:hover::before {
    left: 100%;
}

.btn-hint {
    background: var(--success-gradient);
    box-shadow: var(--shadow-medium), var(--glow-success);
}

.btn-hint::after {
    content: '💡 INDICE';
}

.btn-method {
    background: var(--energy-gradient);
    box-shadow: var(--shadow-medium), var(--glow-energy);
}

.btn-method::after {
    content: '⚡ MÉTHODE';
}

.btn-solution {
    background: var(--power-gradient);
    box-shadow: var(--shadow-medium), 0 0 20px rgba(239, 68, 68, 0.3);
}

.btn-solution::after {
    content: '🚀 SOLUTION';
}

/* 🏆 Solution victorieuse */
.solution {
    display: none;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(6, 182, 212, 0.1) 100%);
    border: 2px solid var(--success-color);
    padding: 2.5rem;
    margin: 2rem 0;
    border-radius: 20px;
    position: relative;
    box-shadow: var(--shadow-medium), var(--glow-success);
    animation: victoryReveal 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes victoryReveal {
    from { 
        opacity: 0; 
        transform: translateY(40px) scale(0.9); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0) scale(1); 
    }
}

.solution::before {
    content: 'BRAVO! 🎉';
    position: absolute;
    top: -16px;
    left: 2rem;
    background: var(--success-gradient);
    color: white;
    padding: 0.5rem 1.25rem;
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: var(--glow-success);
    animation: victoryPulse 1.5s ease-in-out infinite;
}

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

.solution p:first-child {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--success-color);
    border-bottom: 2px solid var(--success-color);
    padding-bottom: 1rem;
    margin-bottom: 2rem;
}

/* 💻 Éléments mathématiques stylés */
.math-text {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
    border: 1px solid var(--focus-color);
    padding: 0.5rem 1rem;
    border-radius: 12px;
    font-family: 'JetBrains Mono', 'Courier New', monospace;
    color: var(--focus-color);
    font-weight: 600;
    display: inline-block;
    margin: 0.25rem;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-soft);
    font-size: 0.95rem;
}

.math-text:hover {
    background: var(--focus-color);
    color: white;
    transform: scale(1.05);
    box-shadow: var(--shadow-medium), var(--glow-focus);
}

.calculation {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.08) 0%, rgba(251, 191, 36, 0.08) 100%);
    border: 1px solid rgba(245, 158, 11, 0.2);
    border-left: 4px solid var(--energy-color);
    padding: 1.5rem;
    border-radius: 16px;
    margin: 1.5rem 0;
    font-family: 'JetBrains Mono', 'Courier New', monospace;
    color: var(--text-primary);
    position: relative;
    box-shadow: var(--shadow-soft);
}

.calculation::before {
    content: '🧮';
    position: absolute;
    right: 1.5rem;
    top: 1.5rem;
    font-size: 1.3rem;
    opacity: 0.8;
}

.highlight {
    background: var(--energy-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 8px;
    font-weight: 700;
    display: inline-block;
    margin: 0.125rem;
    box-shadow: var(--glow-energy);
    animation: highlightGlow 2s ease-in-out infinite;
}

@keyframes highlightGlow {
    0%, 100% { box-shadow: var(--glow-energy); }
    50% { box-shadow: 0 0 25px rgba(245, 158, 11, 0.5); }
}

/* 📱 Mobile responsive optimisé */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    .header {
        padding: 2rem 1.5rem;
        margin-bottom: 2rem;
    }
    
    .header h1 {
        font-size: 2.2rem;
    }
    
    .header h1::after {
        right: -2rem;
        font-size: 1.5rem;
    }
    
    .exercise {
        margin: 2rem 0;
    }
    
    .exercise-header {
        padding: 1.5rem;
        font-size: 1.2rem;
    }
    
    .exercise-content {
        padding: 2rem 1.5rem;
    }
    
    button {
        width: 100%;
        margin: 0.75rem 0;
        padding: 1.25rem;
    }
    
    .mcq-item:hover {
        transform: translateX(6px) scale(1.01);
    }
    
    .exercise:hover {
        transform: translateY(-3px) scale(1.005);
    }
}

/* ♿ Accessibilité */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.2s !important;
    }
}

/* 🎨 Touches finales motivantes */
::selection {
    background: var(--energy-gradient);
    color: white;
}

::-webkit-scrollbar {
    width: 12px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--success-gradient);
    border-radius: 6px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--energy-gradient);
}