:root {
    --primary-color: #2c3e50;
    --secondary-color: #34495e;
    --accent-color: #3498db;
    --danger-color: #e74c3c;
    --success-color: #2ecc71;
    --bg-color: #f4f7f6;
    --text-color: #333;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Nav */
.main-nav {
    background-color: var(--primary-color);
    color: white;
    padding: 15px 0;
}

.main-nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.main-nav .brand {
    font-size: 1.5rem;
    font-weight: bold;
    text-decoration: none;
    color: white;
}

.main-nav ul {
    list-style: none;
    display: flex;
    margin: 0;
    padding: 0;
}

.main-nav ul li {
    margin-left: 20px;
}

.main-nav ul li a {
    color: white;
    text-decoration: none;
    transition: color 0.3s;
}

.main-nav ul li a:hover {
    color: var(--accent-color);
}

.logout-link {
    background-color: var(--danger-color);
    padding: 5px 10px;
    border-radius: 4px;
}

/* Content */
.main-content {
    padding: 40px 0;
    min-height: 80vh;
}

h1 {
    margin-top: 0;
}

/* Dashboard Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.stat-card {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    text-align: center;
}

.stat-card .number {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--accent-color);
    margin: 10px 0;
}

/* Login Form */
.login-container {
    max-width: 400px;
    margin: 100px auto;
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
}

.form-group input, .form-group textarea, .form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-sizing: border-box;
    font-size: 1rem;
}

button {
    background-color: var(--accent-color);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 4px;
    cursor: pointer;
    width: 100%;
    font-size: 1rem;
}

button:hover {
    background-color: #2980b9;
}

.error {
    color: var(--danger-color);
    background: #fdeaea;
    padding: 10px;
    border-radius: 4px;
    margin-bottom: 15px;
}

.success-message {
    color: var(--success-color);
    background: #eafaf1;
    padding: 10px;
    border-radius: 4px;
    margin-bottom: 15px;
    text-align: center;
}

/* Footer */
.main-footer {
    background-color: var(--primary-color);
    color: white;
    text-align: center;
    padding: 20px 0;
    margin-top: 40px;
}
.main-footer .footer-copy {
    display: block;
    margin-bottom: 8px;
}
.main-footer .footer-links {
    display: block;
    font-size: .85rem;
}
.main-footer .footer-links a {
    color: white;
    text-decoration: none;
    opacity: .85;
}
.main-footer .footer-links a:hover {
    opacity: 1;
    text-decoration: underline;
}

/* ── Nav hamburger (desktop) ── */
.nav-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.nav-menu {
    list-style: none;
    display: flex;
    margin: 0;
    padding: 0;
}
.nav-menu li { margin-left: 20px; }
.nav-menu li a { color: white; text-decoration: none; transition: color 0.3s; }
.nav-menu li a:hover { color: var(--accent-color); }

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    width: auto;
}
.hamburger span {
    display: block;
    width: 26px;
    height: 2px;
    background: white;
    border-radius: 2px;
    transition: all .3s;
}

/* Menu mobile overlay (nav connectée) */
.mobile-nav-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: #2c3e50;
    z-index: 200;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0;
}
.mobile-nav-overlay.open { display: flex; }
.mobile-nav-overlay a {
    color: white;
    text-decoration: none;
    font-size: 1.3rem;
    font-weight: 600;
    padding: 16px 0;
    width: 100%;
    text-align: center;
    border-bottom: 1px solid rgba(255,255,255,.1);
}
.mobile-nav-overlay a:last-child { border-bottom: none; }
.mobile-nav-overlay .close-mobile {
    position: absolute;
    top: 18px; right: 22px;
    background: none; border: none; color: white;
    font-size: 2rem; cursor: pointer; width: auto; padding: 0; line-height: 1;
}

/* ── Responsive mobile ── */
@media (max-width: 768px) {

    /* Nav : masquer liens, afficher hamburger */
    .nav-menu { display: none; }
    .hamburger { display: flex; }

    /* Contenu */
    .main-content { padding: 20px 0; }
    .container { padding: 0 12px; }

    /* Grilles → colonne unique */
    .stats-grid { grid-template-columns: 1fr; }

    /* Formulaires */
    input[type="text"], input[type="email"], input[type="password"],
    input[type="number"], input[type="date"], input[type="time"],
    select, textarea {
        font-size: 16px; /* évite le zoom auto sur iOS */
    }

    /* Login */
    .login-container {
        margin: 30px auto;
        padding: 20px 16px;
    }
}