body {
    background-color: #f4f6f9;
}
.bg-login {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
}
.login-card {
    width: 100%;
    max-width: 420px;
    border-radius: 16px;
}
.sidebar {
    min-height: 100vh;
    background: #1e293b;
    color: #fff;
    width: 250px;
}
.sidebar a {
    color: #cbd5e1;
    text-decoration: none;
    display: block;
    padding: 10px 18px;
    border-radius: 8px;
    margin: 2px 8px;
    font-size: 14px;
}
.sidebar a:hover, .sidebar a.active {
    background: #334155;
    color: #fff;
}
.sidebar .brand {
    padding: 18px;
    font-weight: 700;
    font-size: 16px;
    border-bottom: 1px solid #334155;
}
.main-content {
    flex: 1;
    min-height: 100vh;
}
.topbar {
    background: #fff;
    border-bottom: 1px solid #e2e8f0;
    padding: 12px 20px;
}
.card-stat {
    border: none;
    border-radius: 14px;
    color: #fff;
}
.wrapper {
    display: flex;
}
#video-absen, #canvas-absen {
    width: 100%;
    max-width: 420px;
    border-radius: 12px;
    background: #000;
}
.face-box {
    position: relative;
    display: inline-block;
}
@media (max-width: 768px) {
    .sidebar { position: fixed; z-index: 1000; left: -260px; transition: 0.3s; }
    .sidebar.show { left: 0; }
}