/* CSS Saga Soft - Design moderne et responsive */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --dark-color: #1a252f;
    --light-color: #ecf0f1;
    --border-color: #bdc3c7;
    --shadow: 0 4px 15px rgba(0,0,0,0.1);
    --border-radius: 10px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #667eea 100%);
    min-height: 100vh;
    line-height: 1.6;
    color: #333;
}

/* Header */
.header {
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo {
    display: flex;
    align-items: center;
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--primary-color);
}

.logo-icon {
    font-size: 2.2rem;
    margin-right: 0.5rem;
}

/* Container principal */
.main-container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
}

/* Cards */
.card {
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 2rem;
    margin: 2rem 0;
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

/* Page de connexion */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 2rem;
}

.login-card {
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 3rem;
    width: 100%;
    max-width: 450px;
    text-align: center;
}

.login-header {
    margin-bottom: 2rem;
}

.login-header h1 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-size: 2rem;
}

.login-header p {
    color: #666;
    font-size: 1.1rem;
}

/* Formulaires */
.form-group {
    margin-bottom: 1.5rem;
    text-align: left;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
    font-weight: 600;
}

.form-input {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
    background: rgba(255,255,255,0.9);
}

.form-input:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.form-input.error {
    border-color: var(--accent-color);
}

/* Boutons */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    min-width: 150px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--secondary-color), #2980b9);
    color: white;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #2980b9, var(--secondary-color));
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color), #229954);
    color: white;
}

.btn-danger {
    background: linear-gradient(135deg, var(--accent-color), #c0392b);
    color: white;
}

.btn-full {
    width: 100%;
}

/* Grille responsive */
.grid {
    display: grid;
    gap: 2rem;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* Features */
.features-section {
    padding: 3rem 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.feature-card {
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    padding: 2rem;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.feature-icon {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.feature-title {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-weight: 600;
}

.feature-description {
    color: #666;
    line-height: 1.6;
}

/* Section hero */
.hero-section {
    text-align: center;
    padding: 4rem 0;
    color: white;
}

.hero-title {
    font-size: 3rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

/* Messages d'alerte */
.alert {
    padding: 1rem;
    border-radius: var(--border-radius);
    margin: 1rem 0;
    font-weight: 500;
}

.alert-success {
    background: rgba(39, 174, 96, 0.1);
    color: var(--success-color);
    border: 1px solid rgba(39, 174, 96, 0.2);
}

.alert-error {
    background: rgba(231, 76, 60, 0.1);
    color: var(--accent-color);
    border: 1px solid rgba(231, 76, 60, 0.2);
}

.alert-warning {
    background: rgba(243, 156, 18, 0.1);
    color: var(--warning-color);
    border: 1px solid rgba(243, 156, 18, 0.2);
}

/* Tables */
.table-container {
    overflow-x: auto;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.table {
    width: 100%;
    border-collapse: collapse;
    background: white;
}

.table th,
.table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    background: var(--primary-color);
    color: white;
    font-weight: 600;
}

.table tr:hover {
    background: rgba(52, 152, 219, 0.05);
}

/* Responsive */
@media (max-width: 768px) {
    .header-content {
        padding: 0 1rem;
        flex-direction: column;
        gap: 1rem;
    }
    
    .main-container {
        padding: 0 1rem;
    }
    
    .login-card {
        padding: 2rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .login-card {
        padding: 1.5rem;
        margin: 1rem;
    }
    
    .hero-title {
        font-size: 1.8rem;
    }
    
    .card {
        padding: 1.5rem;
        margin: 1rem 0;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* Utilitaires */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 2rem; }

.hidden { display: none; }
.visible { display: block; }

/* Loading spinner */
.spinner {
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--secondary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 2s linear infinite;
    margin: 20px auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}