/* Reset et variables CSS modernes */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Couleurs principales */
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #8b5cf6;
    --secondary-color: #1e293b;
    --accent-color: #f59e0b;
    
    /* Status colors */
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #3b82f6;
    
    /* Greys */
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    
    /* Design tokens */
    --border-radius: 16px;
    --border-radius-sm: 8px;
    --border-radius-lg: 24px;
    --border-radius-xl: 32px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    
    /* Transitions */
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* 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-glass: rgba(255, 255, 255, 0.1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--gradient-primary);
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Particules animées */
.particles-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.particle {
    position: absolute;
    background: rgba(255, 255, 255, 0.6);
    border-radius: 50%;
    animation: float 15s infinite linear;
}

@keyframes float {
    0% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(-100vh) rotate(360deg);
        opacity: 0;
    }
}

/* Background pattern amélioré */
.background-pattern {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.05;
    background-image: 
        radial-gradient(circle at 20% 50%, white 2px, transparent 2px),
        radial-gradient(circle at 40% 20%, white 1px, transparent 1px),
        radial-gradient(circle at 90% 40%, white 1px, transparent 1px),
        radial-gradient(circle at 60% 90%, white 2px, transparent 2px);
    background-size: 120px 120px, 80px 80px, 100px 100px, 140px 140px;
    background-position: 0 0, 40px 60px, 130px 270px, 70px 100px;
    pointer-events: none;
    z-index: 1;
}

/* Header moderne avec glassmorphism */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 1000;
    padding: 1rem 0;
    transition: var(--transition);
}

.header:hover {
    background: rgba(255, 255, 255, 0.12);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--white);
    text-decoration: none;
    transition: var(--transition);
    position: relative;
}

.logo::before {
    content: '';
    position: absolute;
    inset: -8px;
    background: linear-gradient(45deg, transparent, rgba(255,255,255,0.1), transparent);
    border-radius: var(--border-radius);
    opacity: 0;
    transition: var(--transition);
}

.logo:hover::before {
    opacity: 1;
}

.logo:hover {
    transform: translateY(-2px) scale(1.05);
}

.logo i {
    font-size: 2rem;
    background: linear-gradient(45deg, #fbbf24, #f59e0b);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    border-radius: var(--border-radius);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.nav-link::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(-100%);
    transition: var(--transition);
}

.nav-link:hover::before {
    transform: translateX(0);
}

.nav-link:hover {
    color: var(--white);
    transform: translateY(-2px);
}

/* Main content */
.main-content {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6rem 1rem 2rem;
    position: relative;
    z-index: 10;
}


/* Section des avantages */
.benefits-section {
    background: rgba(255,255,255,0.07);
    border-radius: var(--border-radius-lg);
    padding: 2rem 2rem 1.5rem 2rem;
    margin: 2rem auto 0 auto;
    /* max-width: 480px; */
    box-shadow: var(--shadow-lg);
    text-align: center;
}

.benefits-title {
    color: var(--white);
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    letter-spacing: 0.5px;
}

.benefits-grid {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.benefit-item {
    flex: 1 1 120px;
    min-width: 120px;
    max-width: 180px;
    background: rgba(255,255,255,0.10);
    border-radius: var(--border-radius);
    padding: 1rem 0.5rem 1.2rem 0.5rem;
    margin-bottom: 0.5rem;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.benefit-icon {
    background: var(--gradient-success);
    border-radius: 50%;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 0.7rem;
    color: var(--white);
    font-size: 1.6rem;
    box-shadow: 0 2px 8px rgba(16,185,129,0.10);
}

.benefit-item h4 {
    color: var(--white);
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 0.3rem;
}

.benefit-item p {
    color: rgba(255,255,255,0.85);
    font-size: 0.95rem;
    margin: 0;
}

.register_process
{
    margin: 2rem 4rem 0 4rem;
}
/* Responsive pour petits écrans */
@media (max-width: 700px) {
    .header {
        padding: 1rem 0.5rem;
    }   
    .nav-links {
        gap: 1rem;
        display: block;
    }
    .benefits-section {
        padding: 1.2rem 0.5rem 1rem 0.5rem;
        max-width: 100%;
        margin: 1.5rem 0 0 0;
    }
    .benefits-grid {
        flex-direction: column;
        gap: 1rem;
        align-items: stretch;
    }
    .benefit-item {
        max-width: 100%;
        min-width: 0;
        margin-bottom: 0.5rem;
    }
}

/* Responsive stacking pour le formulaire et les avantages */
@media (max-width: 900px) {
    .main-content {
        flex-direction: column;
        align-items: stretch;
        gap: 2rem;
        padding: 2rem 0.5rem 1rem 0.5rem;
    }
    .login-container,
    .benefits-section {
        max-width: 100%;
        margin: 0 auto;
        box-sizing: border-box;
    }
    .form-input {
       
        color: black !important;
    }

}


/* Container principal avec glassmorphism */
.login-container {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius-xl);
    padding: 3rem;
    width: 100%;
    max-width: 480px;
    box-shadow: var(--shadow-2xl);
    position: relative;
    overflow: hidden;
    opacity: 0;
    transform: translateY(30px) scale(0.95);
    transition: var(--transition-slow);
}

.login-container.animate-in {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.login-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent-color), transparent);
    animation: shimmer 2s infinite;
}

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

/* Badge de sécurité */
.security-badge {
    position: absolute;
    top: -10px;
    right: 2rem;
    background: rgba(16, 185, 129, 0.9);
    backdrop-filter: blur(10px);
    color: var(--white);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: var(--shadow-lg);
}

.security-badge i {
    font-size: 1rem;
}

/* Header de connexion */
.login-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.login-logo {
    position: relative;
    display: inline-block;
    margin-bottom: 1.5rem;
}

.login-logo i {
    font-size: 4rem;
    color: var(--white);
    filter: drop-shadow(0 4px 8px rgba(0,0,0,0.2));
    animation: pulse 2s infinite;
}

.logo-glow {
    position: absolute;
    inset: -20px;
    background: radial-gradient(circle, rgba(255,255,255,0.3) 0%, transparent 70%);
    border-radius: 50%;
    animation: glow 3s ease-in-out infinite alternate;
}

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

@keyframes glow {
    0% { opacity: 0.5; transform: scale(0.8); }
    100% { opacity: 0.8; transform: scale(1.2); }
}

.login-header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--white) 0%, rgba(255,255,255,0.8) 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.login-subtitle {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 2rem;
    font-weight: 400;
}

.typewriter {
    border-right: 2px solid var(--accent-color);
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 50% { border-color: var(--accent-color); }
    51%, 100% { border-color: transparent; }
}

/* Statistiques de la plateforme */
.platform-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-top: 2rem;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-item {
    text-align: center;
}

.stat-item i {
    font-size: 1.5rem;
    color: var(--accent-color);
    margin-bottom: 0.5rem;
    display: block;
}

.stat-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
    display: block;
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.7);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 500;
}

/* Messages */
#message-container {
    margin-bottom: 1.5rem;
}

.message {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
    position: relative;
    overflow: hidden;
    opacity: 0;
    transform: translateY(-20px);
    transition: var(--transition);
}

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

.message.hide {
    opacity: 0;
    transform: translateY(-20px);
}

.message.success {
    background: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #10b981;
}

.message.error {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #ef4444;
}

.message.warning {
    background: rgba(245, 158, 11, 0.15);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: #f59e0b;
}

.message.info {
    background: rgba(59, 130, 246, 0.15);
    border: 1px solid rgba(59, 130, 246, 0.3);
    color: #3b82f6;
}

.message-icon {
    flex-shrink: 0;
}

.message-content {
    flex: 1;
    font-weight: 500;
}

.message-close {
    background: none;
    border: none;
    color: inherit;
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 50%;
    transition: var(--transition);
    opacity: 0.7;
}

.message-close:hover {
    opacity: 1;
    background: rgba(0,0,0,0.1);
}

.message-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 2px;
    background: currentColor;
    animation: progress linear;
    transform-origin: left;
}

@keyframes progress {
    0% { transform: scaleX(1); }
    100% { transform: scaleX(0); }
}

/* Section du formulaire */
.form-section {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-lg);
    padding: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 2rem;
}

.form-section-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.form-section-title i {
    color: var(--accent-color);
}

/* Groupes de formulaire */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
}

.form-label i {
    color: var(--accent-color);
    width: 16px;
}

.input-container {
    position: relative;
}

.form-input {
    width: 100%;
    padding: 1rem 1.25rem;
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius);
    color: var(--white);
    font-size: 1rem;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.form-input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.input-container.focused .input-focus {
    transform: scaleX(1);
}

.input-focus {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transform: scaleX(0);
    transition: var(--transition);
}

/* Validation des inputs */
.input-validation {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    opacity: 0;
    transition: var(--transition);
}

.input-container.valid .input-validation {
    opacity: 1;
}

.input-container.valid .valid-icon {
    display: block;
    color: var(--success-color);
}

.input-container.valid .invalid-icon {
    display: none;
}

.input-container.invalid .input-validation {
    opacity: 1;
}

.input-container.invalid .valid-icon {
    display: none;
}

.input-container.invalid .invalid-icon {
    display: block;
    color: var(--danger-color);
}

.input-hint {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Password toggle */
.password-toggle {
    position: absolute;
    right: 3.5rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.6);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: var(--transition);
}

.password-toggle:hover,
.password-toggle.active {
    color: var(--white);
    background: rgba(255, 255, 255, 0.1);
}

/* Barre de force du mot de passe */
.password-strength {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: rgba(255, 255, 255, 0.1);
    overflow: hidden;
}

.strength-bar {
    height: 100%;
    width: 0%;
    background: var(--danger-color);
    transition: var(--transition);
}

.strength-bar.weak {
    background: linear-gradient(90deg, #ef4444, #f87171);
}

.strength-bar.medium {
    background: linear-gradient(90deg, #f59e0b, #fbbf24);
}

.strength-bar.strong {
    background: linear-gradient(90deg, #10b981, #34d399);
}

/* États d'erreur pour les champs */
.form-input.error {
    border-color: var(--danger-color);
    animation: shake 0.3s ease-in-out;
}

/* Animations supplémentaires pour les interactions */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

.shake {
    animation: shake 0.6s ease-in-out;
}

/* Améliorations pour les messages de notification */
.message {
    transform: translateY(-10px);
    opacity: 0;
    transition: var(--transition);
}

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

.message.hide {
    transform: translateY(-10px);
    opacity: 0;
}

/* Loading state pour les boutons sociaux */
.social-btn.loading {
    pointer-events: none;
    opacity: 0.7;
}

.social-btn.loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top: 2px solid var(--white);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
}

/* Animation d'entrée pour le container */
.login-container.animate-in {
    animation: slideInUp 0.6s ease-out;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Effet de hover amélioré pour les liens */
.forgot-link,
.signup-link {
    position: relative;
    overflow: hidden;
}

.forgot-link::before,
.signup-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: currentColor;
    transition: var(--transition);
}

.forgot-link:hover::before,
.signup-link:hover::before {
    width: 100%;
}

/* Améliorations pour l'accessibilité */
@media (prefers-reduced-motion: reduce) {
    .particle {
        animation-duration: 0.01ms !important;
    }
    
    .shake,
    .slideInUp,
    .spin {
        animation: none !important;
    }
    
    * {
        transition-duration: 0.01ms !important;
    }
}

/* Focus visible pour l'accessibilité */
.login-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    width: 100%;
    padding: 1rem 0;
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--white);
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.login-btn:hover,
.login-btn:focus {
    background: var(--gradient-secondary);
    color: var(--white);
    transform: translateY(-2px) scale(1.01);
    box-shadow: 0 8px 24px rgba(99,102,241,0.15);
    outline: none;
}

.login-btn:active {
    transform: scale(0.98);
}

.login-btn .btn-content {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.login-btn .btn-loader,
.login-btn .btn-success {
    display: none;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
}

.login-btn.loading .btn-content {
    display: none;
}
.login-btn.loading .btn-loader {
    display: flex;
}
.login-btn.success .btn-content,
.login-btn.success .btn-loader {
    display: none;
}
.login-btn.success .btn-success {
    display: flex;
}

/* Spinner pour le loader */
.btn-loader .spinner {
    width: 18px;
    height: 18px;
    border: 3px solid rgba(255,255,255,0.3);
    border-top: 3px solid var(--white);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* États de survol améliorés */
.form-input:hover:not(:focus) {
    border-color: rgba(255, 255, 255, 0.4);
    background: rgba(255, 255, 255, 0.12);
}

.checkbox-container:hover .checkmark {
    border-color: rgba(255, 255, 255, 0.5);
    background: rgba(255, 255, 255, 0.15);
}

/* Améliorations pour les écrans tactiles */
@media (hover: none) and (pointer: coarse) {
    .login-btn,
    .social-btn {
        padding: 1.5rem 2rem;
    }
    
    .password-toggle {
        padding: 1rem;
    }
    
    .form-input {
        padding: 1.25rem 1.5rem;
    }
}

/* Footer de connexion */
.login-footer {
    text-align: center;
}

.divider {
    position: relative;
    margin: 2rem 0;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
    font-weight: 500;
}

.divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
}

.divider span {
    background: rgba(255, 255, 255, 0.1);
    padding: 0 1.5rem;
    position: relative;
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
}

/* Connexions sociales */
.social-login {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.social-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius);
    color: var(--white);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.social-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.social-btn.loading {
    pointer-events: none;
    opacity: 0.7;
}

.social-btn.loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top: 2px solid var(--white);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
}

.social-icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.social-ripple {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle, rgba(255,255,255,0.3) 0%, transparent 70%);
    transform: scale(0);
    opacity: 0;
}

@keyframes ripple {
    0% {
        transform: scale(0);
        opacity: 1;
    }
    100% {
        transform: scale(4);
        opacity: 0;
    }
}

.google-btn:hover {
    border-color: #db4437;
}

.github-btn:hover {
    border-color: #333;
}

.microsoft-btn:hover {
    border-color: #0078d4;
}

/* Section d'inscription */
.signup-section {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-lg);
    padding: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: 2rem;
}

.signup-text {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 1rem;
    font-size: 1rem;
}

.signup-link {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    padding: 0.75rem 1.5rem;
    background: rgba(245, 158, 11, 0.1);
    border-radius: var(--border-radius);
    border: 1px solid rgba(245, 158, 11, 0.3);
    transition: var(--transition);
    margin-bottom: 1.5rem;
}

.signup-link:hover {
    background: rgba(245, 158, 11, 0.2);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.link-arrow {
    transition: var(--transition);
    font-size: 1.2rem;
}

.signup-link:hover .link-arrow {
    transform: translateX(4px);
}

/* Avantages de l'inscription */
.signup-benefits {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.benefit-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
}

.benefit-item i {
    color: var(--success-color);
    background: rgba(16, 185, 129, 0.2);
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    flex-shrink: 0;
}

/* Section témoignages */
.testimonials-section {
    position: fixed;
    bottom: 2rem;
    left: 2rem;
    width: 350px;
    z-index: 5;
}

.testimonial {
    opacity: 0;
    transform: translateX(-20px);
    transition: var(--transition-slow);
    position: absolute;
    inset: 0;
}

.testimonial.active {
    opacity: 1;
    transform: translateX(0);
    position: relative;
}

.testimonial-content {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
    color: var(--white);
}

.testimonial-content p {
    font-style: italic;
    margin-bottom: 1rem;
    line-height: 1.6;
    font-size: 0.9rem;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.author-avatar {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.2rem;
}

.author-info strong {
    display: block;
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

.author-info span {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.7);
}

/* Footer amélioré */
.footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(20px);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 1rem 0;
    z-index: 1000;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.footer-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.85rem;
}

.footer-link:hover {
    color: var(--white);
    transform: translateY(-1px);
}

.footer-link i {
    font-size: 0.8rem;
}

/* Responsive design */
@media (max-width: 1024px) {
    .testimonials-section {
        display: none;
    }
}

@media (max-width: 768px) {
    .header-content {
        padding: 0 1rem;
    }
    
    .nav-links {
        gap: 0.5rem;
    }
    
    .nav-link {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }
    
    .nav-link span {
        display: none;
    }
    
    .main-content {
        padding: 5rem 1rem 8rem;
    }
    
    .login-container {
        padding: 2rem 1.5rem;
        max-width: 100%;
        margin-top: 2rem;
    }
    
    .login-header h1 {
        font-size: 2rem;
    }
    
    .platform-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: 0.75rem;
        padding: 1rem;
    }
    
    .stat-number {
        font-size: 1.25rem;
    }
    
    .stat-label {
        font-size: 0.7rem;
    }
    
    .form-section {
        padding: 1.5rem;
    }
    
    .form-options {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .checkbox-container {
        min-width: auto;
    }
    
    .social-login {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
        padding: 1rem;
    }
    
    .footer-links {
        gap: 1rem;
        flex-wrap: wrap;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .login-container {
        padding: 1.5rem 1rem;
        border-radius: var(--border-radius);
    }
    
    .login-header h1 {
        font-size: 1.75rem;
    }
    
    .login-logo i {
        font-size: 3rem;
    }
    
    .platform-stats {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .form-section {
        padding: 1rem;
    }
    
    .form-section-title {
        font-size: 1.1rem;
    }
    
    .social-btn {
        padding: 0.875rem;
        font-size: 0.9rem;
    }
}

/* Dark mode support (si préféré par l'utilisateur) */
@media (prefers-color-scheme: dark) {
    :root {
        --primary-color: #818cf8;
        --primary-dark: #6366f1;
    }
}

/* Reduced motion pour l'accessibilité */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .particle {
        display: none;
    }
    
    .typewriter {
        border-right: none;
    }
}

/* High contrast mode pour l'accessibilité */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #0066cc;
        --success-color: #00aa00;
        --danger-color: #cc0000;
        --warning-color: #cc6600;
    }
    
    .login-container {
        border: 2px solid var(--white);
    }
    
    .form-input {
        border-width: 3px;
    }
}

/* Styles pour les écrans haute résolution */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 2dppx) {
    .login-logo i {
        filter: drop-shadow(0 2px 4px rgba(0,0,0,0.3));
    }
}