/* Styles personnalis�s */ 
/* ============================================
   BOP EDU AI - Custom CSS
   Couleurs : #1E5EFF, #6C3BFF, #19C37D, #FFFFFF, #F5F7FA, #1A1A1A
   Typographie : Poppins
   ============================================ */

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

/* ---------- Variables ---------- */
:root {
    --primary-blue: #1E5EFF;
    --primary-violet: #6C3BFF;
    --success-green: #19C37D;
    --white: #FFFFFF;
    --light-gray: #F5F7FA;
    --text-dark: #1A1A1A;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 8px 30px rgba(0,0,0,0.08);
    --shadow-lg: 0 20px 60px rgba(0,0,0,0.10);
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--light-gray);
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    color: var(--text-dark);
}

a {
    text-decoration: none;
    color: var(--primary-blue);
    transition: var(--transition);
}
a:hover {
    color: var(--primary-violet);
}

/* ---------- Boutons ---------- */
.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-violet));
    border: none;
    color: var(--white);
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(30, 94, 255, 0.3);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(30, 94, 255, 0.4);
    color: var(--white);
}

.btn-outline-primary {
    border: 2px solid var(--primary-blue);
    color: var(--primary-blue);
    background: transparent;
    padding: 10px 28px;
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition);
}
.btn-outline-primary:hover {
    background: var(--primary-blue);
    color: var(--white);
    transform: translateY(-2px);
}

.btn-success {
    background: var(--success-green);
    border: none;
    color: var(--white);
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition);
}
.btn-success:hover {
    background: #15a86b;
    transform: translateY(-2px);
    color: var(--white);
}

/* ---------- Cartes ---------- */
.card-modern {
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: none;
    transition: var(--transition);
    overflow: hidden;
}
.card-modern:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.card-glass {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

/* ---------- Badges ---------- */
.badge-ai {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-violet));
    color: var(--white);
    padding: 6px 14px;
    border-radius: 50px;
    font-weight: 500;
    font-size: 0.75rem;
}

/* ---------- Barres de progression ---------- */
.progress {
    height: 10px;
    border-radius: 50px;
    background: var(--light-gray);
}
.progress-bar {
    background: linear-gradient(90deg, var(--primary-blue), var(--primary-violet));
    border-radius: 50px;
}

/* ---------- Animations ---------- */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}
.animate-fade-up {
    animation: fadeInUp 0.6s ease forwards;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}
.animate-float {
    animation: float 3s ease-in-out infinite;
}

/* ---------- Hero ---------- */
.hero-section {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-violet));
    color: var(--white);
    padding: 80px 0 100px;
    position: relative;
    overflow: hidden;
}
.hero-section h1 {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--white);
    line-height: 1.2;
}
.hero-section .subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
}
.hero-section .btn-primary {
    background: var(--white);
    color: var(--primary-blue);
    box-shadow: none;
}
.hero-section .btn-primary:hover {
    background: var(--light-gray);
    color: var(--primary-violet);
}
.hero-section .btn-outline-light {
    border-color: var(--white);
    color: var(--white);
}
.hero-section .btn-outline-light:hover {
    background: var(--white);
    color: var(--primary-blue);
}

/* ---------- Footer ---------- */
.footer-modern {
    background: var(--text-dark);
    color: rgba(255,255,255,0.7);
    padding: 60px 0 30px;
}
.footer-modern a {
    color: rgba(255,255,255,0.7);
}
.footer-modern a:hover {
    color: var(--white);
}

/* ---------- Sidebar ---------- */
.sidebar {
    background: var(--white);
    height: 100vh;
    position: sticky;
    top: 0;
    padding: 20px 0;
    box-shadow: var(--shadow-sm);
    overflow-y: auto;
}
.sidebar .nav-link {
    color: var(--text-dark);
    padding: 12px 20px;
    border-radius: var(--radius-sm);
    margin: 4px 12px;
    font-weight: 500;
    transition: var(--transition);
}
.sidebar .nav-link i {
    width: 24px;
    margin-right: 10px;
}
.sidebar .nav-link:hover,
.sidebar .nav-link.active {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-violet));
    color: var(--white);
    box-shadow: 0 4px 12px rgba(30,94,255,0.2);
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
    .hero-section h1 {
        font-size: 2.5rem;
    }
    .sidebar {
        height: auto;
        position: relative;
    }
}

/* ---------- Utilitaires ---------- */
.text-gradient {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-violet));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.bg-gradient {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-violet));
}
.shadow-hover:hover {
    box-shadow: var(--shadow-lg);
}