/* ===== VARIABLES CSS ===== */
:root {
    --primary-color: #3498db;
    --secondary-color: #2980b9;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    --light-color: #ecf0f1;
    --dark-color: #34495e;
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --shadow-soft: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 8px 25px rgba(0, 0, 0, 0.15);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
    color: var(--dark-color);
    line-height: 1.6;
}

/* ===== NAVIGATION ===== */
.navbar {
    background: var(--gradient-primary) !important;
    box-shadow: var(--shadow-medium);
    border: none;
    padding: 1rem 0;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: white !important;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.nav-link {
    color: rgba(255, 255, 255, 0.9) !important;
    font-weight: 500;
    padding: 0.75rem 1rem !important;
    border-radius: 8px;
    margin: 0 0.25rem;
    transition: var(--transition);
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.2);
    color: white !important;
    transform: translateY(-2px);
}

.navbar-text {
    color: rgba(255, 255, 255, 0.9) !important;
    font-weight: 500;
}

/* ===== CONTAINER PRINCIPAL ===== */
main.container {
    margin-top: 2rem;
    margin-bottom: 3rem;
}

/* Footer fixed at bottom (static across pages). Ensure main has enough bottom padding to avoid overlap. */
.site-footer {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 -6px 18px rgba(0,0,0,0.08);
    z-index: 1000;
}

main.container {
    /* ensure content doesn't get hidden behind the fixed footer */
    padding-bottom: 4.5rem; /* slightly larger than footer height */
}

/* ===== CARTES ===== */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
    overflow: hidden;
    background: white;
}

.card:hover {
    box-shadow: var(--shadow-medium);
    transform: translateY(-2px);
}

.card-header {
    background: var(--gradient-primary) !important;
    color: white !important;
    border: none !important;
    padding: 1.5rem;
    font-weight: 600;
    font-size: 1.25rem;
}

.card-body {
    padding: 2rem;
}

/* ===== BOUTONS ===== */
.btn {
    border-radius: 8px;
    font-weight: 500;
    padding: 0.75rem 1.5rem;
    transition: var(--transition);
    border: none;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.9rem;
}s

.btn-primary {
    background-image: var(--gradient-primary) !important;
    background-color: transparent !important;
    border: none !important;
    color: white !important;
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
}

.btn-primary:hover {
    background-image: var(--gradient-primary) !important;
    filter: brightness(0.95);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.btn-success {
    background: linear-gradient(135deg, #27ae60 0%, #2ecc71 100%);
    box-shadow: var(--shadow-soft);
}

.btn-warning {
    background: linear-gradient(135deg, #f39c12 0%, #e67e22 100%);
    box-shadow: var(--shadow-soft);
}

.btn-danger {
    background: linear-gradient(135deg, #e74c3c 0%, #c0392b 100%);
    box-shadow: var(--shadow-soft);
}

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

/* ===== FORMULAIRES ===== */
.form-control {
    border: 2px solid #e9ecef;
    border-radius: 8px;
    padding: 0.75rem 1rem;
    transition: var(--transition);
    font-size: 1rem;
}

.form-control:focus {
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 0.2rem rgba(52, 152, 219, 0.25);
    transform: translateY(-1px);
}

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

/* ===== TABLES ===== */
.table {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-soft);
}

.table thead th {
    background: var(--gradient-primary);
    color: white;
    border: none;
    font-weight: 600;
    padding: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.9rem;
}

.table tbody tr {
    transition: var(--transition);
}

.table tbody tr:hover {
    background: rgba(52, 152, 219, 0.05);
    transform: scale(1.01);
}

.table tbody td {
    padding: 1rem;
    border-color: #f8f9fa;
    vertical-align: middle;
}

/* ===== BADGES ===== */
.badge {
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 500;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.bg-success {
    background: linear-gradient(135deg, #27ae60 0%, #2ecc71 100%) !important;
}

.bg-warning {
    background: linear-gradient(135deg, #f39c12 0%, #e67e22 100%) !important;
}

.bg-secondary {
    background: linear-gradient(135deg, #95a5a6 0%, #7f8c8d 100%) !important;
}

/* ===== ALERTES ===== */
.alert {
    border: none;
    border-radius: var(--border-radius);
    padding: 1rem 1.5rem;
    font-weight: 500;
    box-shadow: var(--shadow-soft);
}

.alert-danger {
    background: linear-gradient(135deg, #e74c3c 0%, #c0392b 100%);
    color: white;
}

.alert-success {
    background: linear-gradient(135deg, #27ae60 0%, #2ecc71 100%);
    color: white;
}

/* ===== PAGES SPÉCIFIQUES ===== */

/* Page de connexion */
.login-container {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-card {
    max-width: 400px;
    width: 100%;
    margin: 0 auto;
}

/* Page de marquage de présence */
.presence-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
}

.presence-card .card-body {
    padding: 3rem 2rem;
}

.presence-time {
    font-size: 3rem;
    font-weight: 700;
    margin: 1rem 0;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

/* Make the presence form a bit more compact */
.presence-form {
    max-width: 520px;
}
.presence-form .card-header {
    padding: 0.75rem;
    font-size: 1rem;
}
.presence-form .card-body {
    padding: 1rem;
}
.presence-form .form-label {
    font-size: 0.95rem;
}
.presence-form .form-control, .presence-form .form-select {
    padding: 0.55rem 0.8rem;
    font-size: 0.95rem;
}
.presence-form .btn {
    padding: 0.6rem 1rem;
    font-size: 0.9rem;
}
.presence-form .presence-time {
    font-size: 2.2rem;
}

.presence-date {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 2rem;
}

/* Statistiques */
.stats-card {
    text-align: center;
    padding: 2rem;
}

.stats-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.stats-label {
    color: var(--dark-color);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.9rem;
}

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

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

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

.pulse {
    animation: pulse 2s infinite;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .navbar-brand {
        font-size: 1.25rem;
    }
    
    .card-body {
        padding: 1.5rem;
    }
    
    .presence-time {
        font-size: 2rem;
    }
    
    .btn {
        padding: 0.6rem 1.2rem;
        font-size: 0.85rem;
    }
    
    .table-responsive {
        border-radius: var(--border-radius);
    }
}

@media (max-width: 576px) {
    main.container {
        margin-top: 1rem;
        padding: 0 1rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .presence-time {
        font-size: 1.5rem;
    }
    
    .stats-number {
        font-size: 2rem;
    }
}

/* ===== UTILITAIRES ===== */
.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.shadow-custom {
    box-shadow: var(--shadow-medium);
}

.border-gradient {
    border: 2px solid;
    border-image: var(--gradient-primary) 1;
}

/* ===== LOADING ===== */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

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

/* ===== DROPDOWN ===== */
.dropdown-menu {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-medium);
    padding: 0.5rem 0;
}

.dropdown-item {
    padding: 0.75rem 1.5rem;
    transition: var(--transition);
}

.dropdown-item:hover {
    background: rgba(52, 152, 219, 0.1);
    color: var(--secondary-color);
}

/* ===== FOOTER ===== */
footer {
    background: var(--gradient-primary);
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 3rem;
}

footer p {
    margin: 0;
    opacity: 0.9;
}