:root {
    --blue: #0886d7;
    --orange: #f79707;
    --bg: #f4f7fb;
    --sidebar: #0b2d4d;
    --text: #1f2937;
    --border: #dbe3ee;
    --danger: #c0392b;
    --success: #1e8449;
    --warning: #b9770e;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: Segoe UI, Roboto, Arial, sans-serif;
    color: var(--text);
    background: var(--bg);
}

.admin-shell { display: flex; min-height: 100vh; }
.admin-sidebar {
    width: 260px;
    background: var(--sidebar);
    color: #fff;
    padding: 24px 16px;
}
.admin-sidebar .brand {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 24px;
}
.admin-sidebar nav { display: flex; flex-direction: column; gap: 6px; }
.admin-sidebar a {
    color: #dbeafe;
    text-decoration: none;
    padding: 8px 10px;
    border-radius: 8px;
}
.admin-sidebar a:hover { background: rgba(255,255,255,.08); }
.nav-group {
    margin-top: 16px;
    margin-bottom: 4px;
    font-size: .75rem;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: #93c5fd;
}

.admin-main { flex: 1; display: flex; flex-direction: column; }
.admin-topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 28px;
    background: #fff;
    border-bottom: 1px solid var(--border);
}
.admin-topbar h1 { margin: 0; font-size: 1.35rem; }
.admin-topbar-actions { display: flex; gap: 10px; }
.admin-content { padding: 24px 28px; }

.card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
}
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
}
.card-link {
    display: block;
    text-decoration: none;
    color: inherit;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 18px;
    background: #fff;
    transition: box-shadow .15s ease;
}
.card-link:hover { box-shadow: 0 8px 24px rgba(0,0,0,.08); }
.card-link h3 { margin: 0 0 8px; color: var(--blue); }
.card-link p { margin: 0; color: #64748b; font-size: .95rem; }

.form label {
    display: block;
    margin-bottom: 14px;
    font-weight: 600;
}
.form input[type=text],
.form input[type=email],
.form input[type=number],
.form input[type=url],
.form input[type=password],
.form input[type=file],
.form select,
.form textarea {
    width: 100%;
    margin-top: 6px;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font: inherit;
}
.form textarea { min-height: 110px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-actions { display: flex; gap: 10px; margin-top: 18px; }

.btn {
    display: inline-block;
    border: none;
    border-radius: 8px;
    padding: 10px 16px;
    text-decoration: none;
    cursor: pointer;
    font: inherit;
}
.btn-primary { background: var(--blue); color: #fff; }
.btn-light { background: #e2e8f0; color: #111; }
.btn-danger { background: var(--danger); color: #fff; }
.text-danger { color: var(--danger); font-weight: 600; }
.btn-secondary { background: #64748b; color: #fff; }

.table { width: 100%; border-collapse: collapse; background: #fff; }
.table th, .table td {
    border-bottom: 1px solid var(--border);
    padding: 12px;
    text-align: left;
    vertical-align: top;
}
.table th { background: #f8fafc; }
.thumb { width: 72px; height: 54px; object-fit: cover; border-radius: 6px; }

.alert {
    padding: 12px 14px;
    border-radius: 8px;
    margin-bottom: 16px;
}
.alert-error { background: #fdecea; color: #922b21; }
.alert-success { background: #eafaf1; color: var(--success); }
.alert-warning { background: #fef5e7; color: var(--warning); }

.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0b2d4d, #0886d7);
}
.auth-box {
    width: min(420px, 92vw);
    background: #fff;
    border-radius: 14px;
    padding: 28px;
    box-shadow: 0 20px 50px rgba(0,0,0,.18);
}
.auth-box h1 { margin-top: 0; }
.muted { color: #64748b; }

@media (max-width: 900px) {
    .admin-shell { flex-direction: column; }
    .admin-sidebar { width: 100%; }
    .form-row { grid-template-columns: 1fr; }
}