@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap");

/*
  Style global moderne - Thème sombre violet/bleu
  Design ultra-moderne avec glassmorphism et ombres
*/
:root {
    /* Couleurs principales - Tons violet/bleu modernes */
    --bg-primary: #0a0a0f;
    --bg-secondary: #121218;
    --bg-tertiary: #1a1a24;
    --surface: #1e1e2e;
    --surface-hover: #252538;
    
    /* Couleurs d'accent */
    --primary: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --secondary: #8b5cf6;
    --accent: #a855f7;
    --accent-light: #c084fc;
    
    /* Couleurs de texte */
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --text-dark: #64748b;
    
    /* Couleurs d'état */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    
    /* Effets visuels */
    --border-radius-sm: 8px;
    --border-radius: 12px;
    --border-radius-lg: 16px;
    --border-radius-xl: 24px;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.2);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);
    --shadow-glow-lg: 0 0 40px rgba(99, 102, 241, 0.4);
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Glassmorphism */
    --glass-bg: rgba(30, 30, 46, 0.8);
    --glass-border: rgba(248, 250, 252, 0.1);
    --backdrop-blur: blur(20px);
}

/* Reset et base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-tertiary) 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Scrollbar moderne */
::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: linear-gradient(45deg, var(--primary), var(--secondary));
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(45deg, var(--primary-light), var(--accent));
}

/* Composants de base */
.container-modern {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: var(--backdrop-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
}

.glass-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
    border-color: rgba(99, 102, 241, 0.3);
}

.modern-card {
    background: var(--surface);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(248, 250, 252, 0.05);
    transition: var(--transition);
    overflow: hidden;
    position: relative;
}

.modern-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
    opacity: 0;
    transition: var(--transition);
}

.modern-card:hover {
    transform: translateY(-6px) scale(1.02);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
    border-color: rgba(99, 102, 241, 0.2);
}

.modern-card:hover::before {
    opacity: 1;
}

/* Boutons modernes */
.btn-modern {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-family: inherit;
    font-weight: 600;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn-modern::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.5s;
}

.btn-modern:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: var(--shadow), 0 0 20px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 0 30px rgba(99, 102, 241, 0.5);
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
}

.btn-secondary {
    background: var(--surface);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
    backdrop-filter: var(--backdrop-blur);
}

.btn-secondary:hover {
    transform: translateY(-2px);
    background: var(--surface-hover);
    border-color: var(--primary);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

/* Typographie */
.heading-xl {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.1;
}

.heading-lg {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.heading-md {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.text-gradient {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-large {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.text-muted {
    color: var(--text-muted);
}

/* Effets d'animation */
@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

@keyframes glow {
    0%, 100% { box-shadow: 0 0 20px rgba(99, 102, 241, 0.3); }
    50% { box-shadow: 0 0 40px rgba(99, 102, 241, 0.6); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.float-animation {
    animation: float 3s ease-in-out infinite;
}

.glow-animation {
    animation: glow 2s ease-in-out infinite;
}

/* Responsive */
@media (max-width: 768px) {
    .container-modern {
        padding: 0 1rem;
        max-width: 100%;
    }
    
    .btn-modern {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }
    
    .heading-xl {
        font-size: 2.5rem;
        text-align: center;
    }
    
    .heading-lg {
        font-size: 2rem;
        text-align: center;
    }
    
    .heading-md {
        font-size: 1.5rem;
    }
    
    .section-padding {
        padding: 3rem 0;
    }
    
    /* Hero section responsive */
    #home {
        padding-top: 120px !important;
        min-height: auto !important;
        padding-bottom: 3rem !important;
        text-align: center !important;
    }
      /* Forcer les grilles en colonne unique sur mobile */
    div[style*="display: grid"] {
        grid-template-columns: 1fr !important;
        gap: 1.5rem !important;
        padding: 0 1rem !important;
        justify-items: center !important;
    }
    
    /* Optimiser les cartes sur mobile */
    .glass-card, .modern-card {
        margin: 0 !important;
        max-width: 100% !important;
        width: 100% !important;
    }
    
    /* Centrage des contenus sur mobile */
    .container-modern > div {
        text-align: center;
    }
      /* Grid responsive */
    div[style*="grid-template-columns: repeat(auto-fit, minmax(300px, 1fr))"] {
        grid-template-columns: 1fr !important;
        gap: 1.5rem !important;
    }
    
    /* Grid responsive pour les ressources académiques */
    div[style*="grid-template-columns: repeat(auto-fit, minmax(350px, 1fr))"] {
        grid-template-columns: 1fr !important;
        gap: 1.5rem !important;
        max-width: 100% !important;
    }
    
    /* Cards responsive */
    .modern-card {
        padding: 1.5rem !important;
        margin: 0 auto;
        max-width: 100%;
    }
    
    /* Avatar responsive */
    div[style*="width: 200px; height: 200px"] {
        width: 150px !important;
        height: 150px !important;
        margin: 0 auto 2rem auto !important;
    }
    
    /* Icon size responsive */
    div[style*="width: 80px; height: 80px"] {
        width: 60px !important;
        height: 60px !important;
        font-size: 1.5rem !important;
        margin: 0 auto 1.5rem auto !important;
    }
    
    /* Text adjustments */
    .text-large {
        font-size: 1rem;
        text-align: center;
    }
    
    /* Button responsive */
    .btn-modern {
        width: 100%;
        justify-content: center;
        max-width: 300px;
        margin: 0 auto;
    }
    
    /* Flex adjustments for mobile */
    div[style*="display: flex"] {
        flex-direction: column !important;
        align-items: center !important;
        text-align: center !important;
    }
    
    /* Ensure proper spacing */
    section {
        padding-left: 1rem !important;
        padding-right: 1rem !important;
    }
}

@media (max-width: 480px) {
    .container-modern {
        padding: 0 0.75rem;
    }
    
    .heading-xl {
        font-size: 2rem;
    }
    
    .heading-lg {
        font-size: 1.75rem;
    }
    
    .modern-card {
        padding: 1rem !important;
    }
    
    /* Avatar encore plus petit */
    div[style*="width: 200px; height: 200px"], 
    div[style*="width: 150px; height: 150px"] {
        width: 120px !important;
        height: 120px !important;
    }
    
    div[style*="width: 80px; height: 80px"],
    div[style*="width: 60px; height: 60px"] {
        width: 50px !important;
        height: 50px !important;
        font-size: 1.2rem !important;
    }
      .btn-modern {
        max-width: 280px;
        font-size: 0.85rem;
    }
    
    /* Grilles responsives pour cartes */
    div[style*="grid-template-columns"] {
        grid-template-columns: 1fr !important;
        gap: 1rem !important;
    }
      /* Espacement réduit pour les cartes */
    .glass-card {
        margin: 0 0.5rem !important;
    }
    
    /* Optimiser les icônes sur mobile */
    i[class*="fas"], i[class*="far"], i[class*="fab"] {
        font-size: 1.2rem !important;
    }
      /* Améliorer l'espacement des boutons */
    .btn-modern {
        margin: 0.5rem !important;
        min-width: auto !important;
    }
}

/* Media query pour très petits écrans */
@media (max-width: 320px) {
    .container-modern {
        padding: 0 0.5rem;
    }
    
    .heading-xl {
        font-size: 1.8rem;
    }
    
    .heading-lg {
        font-size: 1.5rem;
    }
    
    .text-large {
        font-size: 1rem;
    }
    
    /* Réduire encore plus l'espacement */
    .section-padding {
        padding: 2rem 0;
    }
    
    /* Optimiser les cartes pour très petits écrans */
    .glass-card, .modern-card {
        padding: 1rem !important;
        margin: 0.25rem !important;
    }
    
    .btn-modern {
        font-size: 0.8rem;
        padding: 0.4rem 0.8rem;
    }
}

/* Navigation moderne */
.navbar-modern {
    background: var(--glass-bg);
    backdrop-filter: var(--backdrop-blur);
    border-bottom: 1px solid var(--glass-border);
    padding: 1rem 0;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: var(--transition);
}

.navbar-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
}

.navbar-modern .nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
    position: relative;
    text-decoration: none;
}

.navbar-modern .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transition: var(--transition);
    transform: translateX(-50%);
}

.navbar-modern .nav-link:hover {
    color: var(--text-primary);
    background: rgba(99, 102, 241, 0.1);
}

.navbar-modern .nav-link:hover::after {
    width: 80%;
}

.navbar-brand-modern {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
}

/* Menu burger */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 2rem;
    height: 2rem;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 10;
}

.mobile-menu-toggle span {
    width: 2rem;
    height: 0.25rem;
    background: var(--text-primary);
    border-radius: 10px;
    transition: all 0.3s linear;
    position: relative;
    transform-origin: 1px;
}

.mobile-menu-toggle.active span:first-child {
    transform: rotate(45deg);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
    transform: translateX(20px);
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg);
}

.nav-menu {
    display: flex;
    gap: 1rem;
}

/* Responsive navbar */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }
    
    .navbar-brand-modern {
        position: absolute;
        left: 50%;
        transform: translateX(-50%);
        font-size: 1.3rem;
        max-width: 60%;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }
    
    .navbar-wrapper {
        width: 100%;
        max-width: 100%;
        overflow: hidden;
        position: relative;
    }
    
    .container-modern {
        overflow: hidden;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--glass-bg);
        backdrop-filter: var(--backdrop-blur);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        border-bottom: 1px solid var(--glass-border);
        padding: 2rem 0;
        gap: 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu .nav-link {
        padding: 1rem 2rem;
        margin: 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        border-radius: 0;
    }
    
    .nav-menu .nav-link:last-child {
        border-bottom: none;
    }
    
    .nav-menu .nav-link::after {
        display: none;
    }
      .nav-menu .nav-link:hover {
        background: rgba(99, 102, 241, 0.2);
    }
}

/* Media query pour très petits écrans - navbar */
@media (max-width: 480px) {
    .navbar-brand-modern {
        font-size: 1.1rem !important;
        max-width: 50% !important;
    }
    
    .mobile-menu-toggle {
        width: 1.8rem;
        height: 1.8rem;
    }
    
    .mobile-menu-toggle span {
        width: 1.8rem;
        height: 0.2rem;
    }
    
    .container-modern {
        padding: 0 0.75rem;
    }
}

@media (max-width: 320px) {
    .navbar-brand-modern {
        font-size: 1rem !important;
        max-width: 45% !important;
    }
    
    .mobile-menu-toggle {
        width: 1.5rem;
        height: 1.5rem;
    }
    
    .mobile-menu-toggle span {
        width: 1.5rem;
        height: 0.18rem;
    }
}

/* Utilitaires */
.gradient-bg {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
}

.glass-effect {
    background: var(--glass-bg);
    backdrop-filter: var(--backdrop-blur);
    border: 1px solid var(--glass-border);
}

.hover-lift {
    transition: var(--transition);
}

.hover-lift:hover {
    transform: translateY(-4px);
}

.hover-scale {
    transition: var(--transition);
}

.hover-scale:hover {
    transform: scale(1.05);
}

.fade-in {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeIn 0.6s ease-out forwards;
}

@keyframes fadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Espacement */
.section-padding {
    padding: 5rem 0;
}

.mb-lg { margin-bottom: 3rem; }
.mb-xl { margin-bottom: 4rem; }
.mt-lg { margin-top: 3rem; }
.mt-xl { margin-top: 4rem; }

/* Classe utilitaire pour grilles responsives */
.responsive-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(350px, 100%), 1fr));
    gap: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

@media (max-width: 768px) {
    .responsive-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        padding: 0 1rem;
        justify-items: center;
    }
}

@media (max-width: 480px) {
    .responsive-grid {
        gap: 1rem;
        padding: 0 0.5rem;
    }
}