/**
 * STACK NOVA ACADEMY - Design Public Moderne
 * Design system complet pour les pages publiques uniquement
 * Version: 1.0.0
 */

/* ============================================
   RESET & BASE
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Couleurs principales - Palette moderne tech */
    --primary: #3B82F6;
    --primary-dark: #2563EB;
    --primary-light: #60A5FA;
    --secondary: #10B981;
    --secondary-dark: #059669;
    --accent: #8B5CF6;
    --accent-dark: #7C3AED;
    --warning: #F59E0B;
    --danger: #EF4444;
    
    /* Couleurs neutres */
    --white: #FFFFFF;
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #3B82F6 0%, #8B5CF6 100%);
    --gradient-secondary: linear-gradient(135deg, #10B981 0%, #3B82F6 100%);
    --gradient-accent: linear-gradient(135deg, #F59E0B 0%, #EF4444 100%);
    --gradient-dark: linear-gradient(135deg, #1F2937 0%, #111827 100%);
    
    /* Espacements */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    
    /* Typographie */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Poppins', var(--font-sans);
    
    /* Tailles de texte */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;
    
    /* Bordures */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Ombres */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--gray-900);
    background: var(--gray-50);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   NAVIGATION BAR
   ============================================ */
.nova-navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--gray-200);
    z-index: 1000;
    transition: all var(--transition-base);
}

.nova-navbar.scrolled {
    box-shadow: var(--shadow-lg);
    background: rgba(255, 255, 255, 0.98);
}

.nova-navbar-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: var(--space-4) var(--space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-6);
}

.nova-navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    text-decoration: none;
    transition: transform var(--transition-fast);
}

.nova-navbar-brand:hover {
    transform: translateY(-2px);
}

.nova-navbar-logo {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-xl);
    object-fit: cover;
    box-shadow: var(--shadow-md);
}

.nova-navbar-title {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nova-navbar-links {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.nova-navbar-link {
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-lg);
    font-size: var(--text-sm);
    font-weight: 600;
    text-decoration: none;
    color: var(--gray-700);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.nova-navbar-link:hover {
    background: var(--gray-100);
    color: var(--primary);
    transform: translateY(-1px);
}

.nova-navbar-link.active {
    background: var(--primary);
    color: var(--white);
}

/* ============================================
   LOGIN CONTAINER
   ============================================ */
.nova-login-wrapper {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    background: var(--gray-100);
}

@media (max-width: 968px) {
    .nova-login-wrapper {
        grid-template-columns: 1fr;
    }
    
    .nova-login-left {
        display: none;
    }
}

/* Partie gauche avec couleur */
.nova-login-left {
    background: linear-gradient(135deg, #10B981 0%, #059669 100%);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: var(--space-12);
    color: white;
    position: relative;
    overflow: hidden;
}

.nova-login-left::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(30px, 30px) scale(1.1); }
}

/* Variantes de couleur */
.nova-login-wrapper.admin .nova-login-left {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.nova-login-wrapper.enseignant .nova-login-left {
    background: linear-gradient(135deg, #10B981 0%, #059669 100%);
}

.nova-login-wrapper.etudiant .nova-login-left {
    background: linear-gradient(135deg, #3B82F6 0%, #2563EB 100%);
}

.nova-login-wrapper.super-admin .nova-login-left {
    background: linear-gradient(135deg, #EF4444 0%, #DC2626 100%);
}

.nova-login-left-content {
    position: relative;
    z-index: 1;
    text-align: center;
}

.nova-login-left-logo {
    width: 120px;
    height: 120px;
    margin: 0 auto var(--space-6);
    border-radius: var(--radius-2xl);
    object-fit: cover;
    box-shadow: var(--shadow-2xl);
    background: white;
    padding: var(--space-3);
}

.nova-login-left-title {
    font-family: var(--font-display);
    font-size: var(--text-4xl);
    font-weight: 900;
    margin-bottom: var(--space-4);
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.nova-login-left-subtitle {
    font-size: var(--text-lg);
    opacity: 0.95;
    margin-bottom: var(--space-8);
    line-height: 1.6;
}

.nova-login-left-features {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    margin-top: var(--space-8);
}

.nova-login-left-feature {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4);
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    text-align: left;
}

.nova-login-left-feature-icon {
    width: 48px;
    height: 48px;
    background: rgba(255,255,255,0.2);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-2xl);
    flex-shrink: 0;
}

.nova-login-left-feature-text {
    font-size: var(--text-sm);
    line-height: 1.4;
}

/* Partie droite avec formulaire */
.nova-login-right {
    background: white;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-8);
}

.nova-login-container {
    width: 100%;
    max-width: 480px;
    background: var(--white);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
    padding: var(--space-10);
    position: relative;
    z-index: 1;
    animation: slideUp 0.6s ease-out;
}

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

.nova-login-header {
    text-align: center;
    margin-bottom: var(--space-8);
}

.nova-login-logo {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-4);
    border-radius: var(--radius-xl);
    object-fit: cover;
    box-shadow: var(--shadow-lg);
}

.nova-login-title {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: var(--space-2);
}

.nova-login-subtitle {
    font-size: var(--text-sm);
    color: var(--gray-600);
}

/* ============================================
   FORMS
   ============================================ */
.nova-form-group {
    margin-bottom: var(--space-5);
}

.nova-form-label {
    display: block;
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: var(--space-2);
}

.nova-form-input-wrapper {
    position: relative;
}

.nova-form-input {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    padding-left: 3rem;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    font-size: var(--text-base);
    color: var(--gray-900);
    background: var(--white);
    transition: all var(--transition-fast);
}

.nova-form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.nova-form-input::placeholder {
    color: var(--gray-400);
}

.nova-form-icon {
    position: absolute;
    left: var(--space-4);
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-400);
    font-size: var(--text-lg);
    pointer-events: none;
}

.nova-form-input:focus + .nova-form-icon {
    color: var(--primary);
}

/* ============================================
   BUTTONS
   ============================================ */
.nova-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    border: none;
    border-radius: var(--radius-lg);
    font-size: var(--text-base);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

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

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

.nova-btn-primary:active {
    transform: translateY(0);
}

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

.nova-btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

.nova-btn-full {
    width: 100%;
}

.nova-btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-lg);
}

/* ============================================
   ALERTS
   ============================================ */
.nova-alert {
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-4);
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.nova-alert-success {
    background: #D1FAE5;
    color: #065F46;
    border-left: 4px solid #10B981;
}

.nova-alert-error {
    background: #FEE2E2;
    color: #991B1B;
    border-left: 4px solid #EF4444;
}

.nova-alert-warning {
    background: #FEF3C7;
    color: #92400E;
    border-left: 4px solid #F59E0B;
}

.nova-alert-info {
    background: #DBEAFE;
    color: #1E40AF;
    border-left: 4px solid #3B82F6;
}

/* ============================================
   HOME PAGE
   ============================================ */
.nova-hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: var(--space-20) var(--space-6);
    position: relative;
    overflow: hidden;
}

.nova-hero::before,
.nova-hero::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
}

.nova-hero::before {
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    animation: float 20s ease-in-out infinite;
}

.nova-hero::after {
    bottom: -50%;
    left: -20%;
    width: 600px;
    height: 600px;
    animation: float 15s ease-in-out infinite reverse;
}

.nova-hero-container {
    max-width: 1280px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
    position: relative;
    z-index: 1;
}

.nova-hero-content {
    color: var(--white);
}

.nova-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 600;
    margin-bottom: var(--space-6);
}

.nova-hero-title {
    font-family: var(--font-display);
    font-size: var(--text-6xl);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: var(--space-6);
}

.nova-hero-description {
    font-size: var(--text-xl);
    line-height: 1.6;
    margin-bottom: var(--space-8);
    opacity: 0.95;
}

.nova-hero-actions {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.nova-hero-image {
    position: relative;
}

.nova-hero-image img {
    width: 100%;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
}

/* ============================================
   FEATURES SECTION
   ============================================ */
.nova-features {
    padding: var(--space-20) var(--space-6);
    background: var(--white);
}

.nova-features-container {
    max-width: 1280px;
    margin: 0 auto;
}

.nova-section-header {
    text-align: center;
    margin-bottom: var(--space-16);
}

.nova-section-badge {
    display: inline-block;
    padding: var(--space-2) var(--space-4);
    background: var(--gray-100);
    color: var(--primary);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 700;
    margin-bottom: var(--space-4);
}

.nova-section-title {
    font-family: var(--font-display);
    font-size: var(--text-5xl);
    font-weight: 900;
    color: var(--gray-900);
    margin-bottom: var(--space-4);
}

.nova-section-description {
    font-size: var(--text-xl);
    color: var(--gray-600);
    max-width: 700px;
    margin: 0 auto;
}

.nova-features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-8);
}

.nova-feature-card {
    padding: var(--space-8);
    background: var(--white);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-2xl);
    transition: all var(--transition-base);
}

.nova-feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary);
}

.nova-feature-icon {
    width: 64px;
    height: 64px;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-3xl);
    color: var(--white);
    margin-bottom: var(--space-4);
}

.nova-feature-title {
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-3);
}

.nova-feature-description {
    color: var(--gray-600);
    line-height: 1.6;
}

/* ============================================
   FOOTER
   ============================================ */
.nova-footer {
    background: var(--gray-900);
    color: var(--white);
    padding: var(--space-12) var(--space-6);
    text-align: center;
}

.nova-footer-logo {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-4);
    border-radius: var(--radius-xl);
    object-fit: cover;
}

.nova-footer-text {
    color: var(--gray-400);
    margin-top: var(--space-4);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    .nova-navbar-container {
        flex-wrap: wrap;
    }
    
    .nova-navbar-links {
        width: 100%;
        justify-content: stretch;
    }
    
    .nova-navbar-link {
        flex: 1;
        justify-content: center;
    }
    
    .nova-hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .nova-hero-title {
        font-size: var(--text-4xl);
    }
    
    .nova-hero-actions {
        justify-content: center;
    }
    
    .nova-features-grid {
        grid-template-columns: 1fr;
    }
    
    .nova-login-container {
        padding: var(--space-6);
    }
}