:root {
    --gcoa-dark:       #0a0e1a;
    --gcoa-navy:       #0d1b2e;
    --gcoa-blue:       #1a3a5c;
    --gcoa-accent:     #1e6fc8;
    --gcoa-gold:       #c9a84c;
    --gcoa-red:        #c0392b;
    --gcoa-white:      #f0f4f8;
    --gcoa-muted:      #7a8a99;
}
body {
    background-color: var(--gcoa-dark);
    color: var(--gcoa-white);
    font-family: 'Segoe UI', sans-serif;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}
.navbar {
    background: linear-gradient(90deg, var(--gcoa-dark), var(--gcoa-navy));
    border-bottom: 2px solid var(--gcoa-gold);
    padding: 0.8rem 0;
    padding-top: calc(0.8rem + env(safe-area-inset-top));
}
.navbar-brand span {
    color: var(--gcoa-gold);
    font-size: 1.3rem;
    letter-spacing: 2px;
}
.navbar-link {
    color: var(--gcoa-white) !important;
    font-weight: 500;
    letter-spacing: 1px;
    transition: color 0.2s;
}
.navbar-link:hover {
    color: var(--gcoa-gold);
}
.btn-login {
    background: var(--gcoa-accent);
    border-radius: 4px;
    padding: 0.4rem 1.2rem !important;
    color: white !important;
    transition: background 0.2s;
}
.btn-login:hover {
    background: var(--gcoa-gold) !important;
    color: var(--gcoa-dark) !important;
}
.btn-logout {
    background: var(--gcoa-red);
    border-radius: 4px;
    padding: 0.4rem 1.2rem !important;
    color: white !important;
}
.hero {
    background: linear-gradient(135deg, var(--gcoa-dark) 0%, var(--gcoa-navy) 50%, var(--gcoa-blue) 100%);
    border-bottom: 3px solid var(--gcoa-gold);
    padding: 100px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url('/assets/img/logo.png') center/300px no-repeat;
    opacity: 0.05;
    pointer-events: none;
}
.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: 4px;
    color: var(--gcoa-white);
}
.hero h1 span {
    color: var(--gcoa-gold);
}
.hero p {
    color: var(--gcoa-muted);
    font-size: 1.2rem;
    letter-spacing: 2px;
}
.gcoa-card {
    background: var(--gcoa-navy);
    border: 1px solid var(--gcoa-blue);
    border-top: 3px solid var(--gcoa-gold);
    border-radius: 6px;
    padding: 2rem;
    transition: transform 0.2s, border-color 0.2s;
}
.gcoa-card i {
    color: var(--gcoa-gold);
    font-size: 2rem;
    margin-bottom: 1rem;
}
.footer {
    background: var(--gcoa-navy);
    border-top: 2px solid var(--gcoa-gold);
    margin-top: auto;
}
.tricolore {
    height: 4px;
    background: linear-gradient(90deg, #002395 33%, white 33%, white 66%, #ED2939 66%);
}
.text-muted {
    color: var(--gcoa-muted) !important;
}
.gcoa-input {
    background: var(--gcoa-dark) !important;
    border: 1px solid var(--gcoa-blue) !important;
    color: var(--gcoa-white) !important;
    border-radius: 4px;
}
.gcoa-input:focus {
    border-color: var(--gcoa-gold) !important;
    box-shadow: 0 0 0 0.2rem rgba(201, 168, 76, 0.2) !important;
}
.gcoa-input::placeholder {
    color: var(--gcoa-muted) !important;
}
.sidebar .nav-link {
    color: var(--gcoa-muted) !important;
    border-radius: 4px;
    transition: all 0.2s;
    padding: 0.6rem 1rem;
}
.sidebar .nav-link:hover,
.sidebar .nav-link.active-link {
    color: var(--gcoa-gold) !important;
    background: var(--gcoa-blue);
}

/* ============================================================ */
/* PWA iOS — Safe Area (notch / Dynamic Island)                 */
/* ============================================================ */
@supports (padding-top: env(safe-area-inset-top)) {
    body {
        padding-top: env(safe-area-inset-top);
    }
    .navbar {
        padding-top: calc(0.8rem + env(safe-area-inset-top));
    }
}

/* ============================================================ */
/* Mobile                                                       */
/* ============================================================ */
@media (max-width: 768px) {
    .hero {
        padding: 60px 0;
    }
    .hero h1 {
        font-size: 2rem;
    }
    .gcoa-card {
        padding: 1.2rem;
    }
    /* Sidebar en mobile : cachée par défaut */
    .sidebar {
        display: none;
    }
    /* Main prend toute la largeur en mobile */
    main.col-md-10 {
        width: 100% !important;
        max-width: 100% !important;
        flex: 0 0 100% !important;
        padding: 1rem !important;
    }
    /* Navbar toggler visible */
    .navbar-toggler {
        border-color: var(--gcoa-gold) !important;
    }
    .navbar-toggler-icon {
        filter: invert(1);
    }
}