:root {
    --admin-bg: #f4f7fb;
    --admin-surface: #ffffff;
    --admin-border: #d9e1ec;
    --admin-accent: #0b5ed7;
    --admin-text: #1f2d3d;
    --admin-muted: #6b7a90;
    --admin-sidebar: #14213d;
}

body.admin-body {
    background: var(--admin-bg);
    color: var(--admin-text);
}

.admin-shell {
    min-height: 100vh;
}

.admin-sidebar {
    background: linear-gradient(180deg, #14213d 0%, #1d3557 100%);
    min-height: 100vh;
    padding: 2rem 1.25rem;
}

.admin-brand {
    color: #fff;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    display: block;
    margin-bottom: 2rem;
    text-decoration: none;
}

.admin-nav a {
    color: rgba(255, 255, 255, 0.82);
    display: block;
    padding: 0.75rem 0.9rem;
    border-radius: 0.75rem;
    text-decoration: none;
    margin-bottom: 0.4rem;
    transition: 0.2s ease-in-out;
}

.admin-nav a:hover,
.admin-nav a.active {
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
}

.admin-main {
    padding: 2rem;
}

.admin-topbar {
    background: var(--admin-surface);
    border: 1px solid var(--admin-border);
    border-radius: 1rem;
    padding: 1rem 1.25rem;
    margin-bottom: 1.5rem;
}

.admin-card {
    background: var(--admin-surface);
    border: 1px solid var(--admin-border);
    border-radius: 1rem;
    box-shadow: 0 15px 35px rgba(20, 33, 61, 0.06);
}

.admin-card .card-body {
    padding: 1.4rem;
}

.admin-stat {
    font-size: 2rem;
    font-weight: 700;
}

.admin-muted {
    color: var(--admin-muted);
}

.admin-table img {
    width: 90px;
    height: 70px;
    object-fit: cover;
    border-radius: 0.65rem;
}

.login-panel {
    min-height: 100vh;
    background: linear-gradient(135deg, #e9f1ff 0%, #f7f9fc 100%);
}

.login-card {
    width: 100%;
    max-width: 460px;
    border: 1px solid var(--admin-border);
    border-radius: 1.25rem;
    background: #fff;
    box-shadow: 0 20px 45px rgba(20, 33, 61, 0.12);
}