:root {
    --navy: #10233f;
    --navy-light: #17325a;
    --red: #c1272d;
    --red-dark: #931d22;
    --cream: #f6f4ee;
    --paper: #ffffff;
    --border: #dcd8cc;
    --text: #1e232b;
    --text-muted: #5c6270;
    --gold: #b8860b;
    --green: #2e7d46;
    --green-bg: #e7f4ea;
    --red-bg: #fbe9e9;
    --radius: 8px;
    --font-serif: Georgia, 'Times New Roman', serif;
    --font-sans: 'Segoe UI', Tahoma, Arial, sans-serif;
    --font-mono: 'Consolas', 'Courier New', monospace;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: var(--font-sans);
    background: var(--cream);
    color: var(--text);
    line-height: 1.5;
}

a { color: var(--navy-light); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- Topbar ---------- */
.topbar {
    background: var(--navy);
    color: #fff;
    padding: 14px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 3px solid var(--red);
}
.topbar .brand {
    display: flex;
    align-items: center;
    gap: 12px;
}
.topbar .brand .emblem {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--red);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-serif);
    font-weight: bold;
    font-size: 15px;
}
.topbar .brand-text .title {
    font-family: var(--font-serif);
    font-size: 16px;
    font-weight: bold;
    letter-spacing: 0.3px;
}
.topbar .brand-text .subtitle {
    font-size: 11px;
    color: #c9d3e0;
    text-transform: uppercase;
    letter-spacing: 1px;
}
.topbar .user-info {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 13px;
}
.topbar .user-info a {
    color: #fff;
    background: rgba(255,255,255,0.12);
    padding: 6px 14px;
    border-radius: 20px;
}
.topbar .user-info a:hover { background: rgba(255,255,255,0.22); text-decoration: none; }

/* ---------- Layout ---------- */
.layout {
    display: flex;
    min-height: calc(100vh - 66px);
}
.sidebar {
    width: 220px;
    background: var(--navy-light);
    color: #dbe2ee;
    padding: 20px 0;
    flex-shrink: 0;
}
.sidebar a {
    display: block;
    padding: 11px 24px;
    color: #dbe2ee;
    font-size: 14px;
    border-left: 3px solid transparent;
}
.sidebar a:hover { background: rgba(255,255,255,0.06); text-decoration: none; }
.sidebar a.active {
    background: rgba(255,255,255,0.1);
    border-left-color: var(--red);
    color: #fff;
    font-weight: 600;
}
.content {
    flex: 1;
    padding: 28px 32px;
    max-width: 1100px;
}

/* ---------- Cards & Panels ---------- */
.panel {
    background: var(--paper);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px 24px;
    margin-bottom: 20px;
}
.panel h2, .panel h3 { margin-top: 0; font-family: var(--font-serif); }

h1.page-title {
    font-family: var(--font-serif);
    font-size: 22px;
    margin: 0 0 4px;
    color: var(--navy);
}
.page-subtitle { color: var(--text-muted); font-size: 13px; margin-bottom: 22px; }

.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: 1fr 1fr; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.stat-card {
    background: var(--paper);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px 20px;
}
.stat-card .num { font-family: var(--font-mono); font-size: 28px; font-weight: bold; color: var(--navy); }
.stat-card .label { font-size: 12px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; margin-top: 4px; }

/* ---------- Forms ---------- */
label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: var(--navy); }
input[type=text], input[type=password], input[type=number], input[type=search], select, textarea {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
    font-family: var(--font-sans);
    background: #fff;
    color: var(--text);
}
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--navy-light);
    box-shadow: 0 0 0 3px rgba(23,50,90,0.12);
}
textarea { resize: vertical; min-height: 80px; }
.form-group { margin-bottom: 16px; }
.form-help { font-size: 12px; color: var(--text-muted); margin-top: 4px; }

.btn {
    display: inline-block;
    padding: 9px 18px;
    border-radius: 6px;
    border: 1px solid var(--navy);
    background: var(--navy);
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--font-sans);
}
.btn:hover { background: var(--navy-light); text-decoration: none; }
.btn-red { background: var(--red); border-color: var(--red); }
.btn-red:hover { background: var(--red-dark); }
.btn-outline { background: transparent; color: var(--navy); }
.btn-outline:hover { background: var(--cream); }
.btn-sm { padding: 5px 12px; font-size: 12px; }
.btn-danger-outline { background: transparent; color: var(--red); border-color: var(--red); }
.btn-danger-outline:hover { background: var(--red-bg); }

/* ---------- Table ---------- */
table.data-table { width: 100%; border-collapse: collapse; font-size: 14px; }
table.data-table th {
    text-align: left;
    background: var(--cream);
    padding: 10px 12px;
    border-bottom: 2px solid var(--border);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.4px;
    color: var(--text-muted);
}
table.data-table td { padding: 10px 12px; border-bottom: 1px solid var(--border); vertical-align: top; }
table.data-table tr:hover td { background: #fbfaf6; }

.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.4px;
}
.badge-green { background: var(--green-bg); color: var(--green); }
.badge-red { background: var(--red-bg); color: var(--red-dark); }
.badge-gray { background: #eee; color: #666; }
.badge-navy { background: #e6ebf3; color: var(--navy); }

/* ---------- Alerts ---------- */
.alert { padding: 12px 16px; border-radius: 6px; margin-bottom: 18px; font-size: 14px; }
.alert-success { background: var(--green-bg); color: var(--green); border: 1px solid #bfe0c8; }
.alert-error { background: var(--red-bg); color: var(--red-dark); border: 1px solid #f0c4c4; }
.alert-info { background: #e6ebf3; color: var(--navy); border: 1px solid #cdd8ea; }

/* ---------- Login page ---------- */
.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(160deg, var(--navy) 0%, var(--navy) 45%, var(--cream) 45%);
    padding: 20px;
}
.login-card {
    background: var(--paper);
    width: 380px;
    max-width: 100%;
    border-radius: 12px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.25);
    overflow: hidden;
}
.login-card .login-head {
    background: var(--navy);
    color: #fff;
    padding: 26px 28px 22px;
    text-align: center;
    border-bottom: 4px solid var(--red);
}
.login-card .login-head .emblem {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: var(--red);
    margin: 0 auto 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-serif);
    font-weight: bold;
    font-size: 20px;
}
.login-card .login-head .title { font-family: var(--font-serif); font-size: 17px; font-weight: bold; }
.login-card .login-head .subtitle { font-size: 12px; color: #c9d3e0; margin-top: 4px; }
.login-card .login-body { padding: 26px 28px 30px; }
.role-tabs { display: flex; gap: 8px; margin-bottom: 20px; }
.role-tabs button {
    flex: 1;
    padding: 8px;
    border: 1px solid var(--border);
    background: var(--cream);
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    color: var(--text-muted);
}
.role-tabs button.active { background: var(--navy); color: #fff; border-color: var(--navy); }

/* ---------- Exam taking screen ---------- */
.time-toast {
    position: fixed;
    top: 14px;
    left: 50%;
    transform: translateX(-50%) translateY(-20px);
    background: var(--red);
    color: #fff;
    padding: 12px 22px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    box-shadow: 0 8px 24px rgba(0,0,0,0.25);
    z-index: 100;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease, transform 0.3s ease;
    max-width: 90vw;
    text-align: center;
}
.time-toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.exam-header {
    background: var(--navy);
    color: #fff;
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 10;
    border-bottom: 3px solid var(--red);
    gap: 12px;
    flex-wrap: wrap;
}
.exam-header-info { min-width: 0; }
.exam-header-info strong { display: block; font-size: 14px; }
.exam-header-sub { font-size: 11.5px; color: #c9d3e0; margin-top: 2px; }
.exam-timer {
    font-family: var(--font-mono);
    font-size: 22px;
    font-weight: bold;
    background: rgba(255,255,255,0.1);
    padding: 6px 16px;
    border-radius: 6px;
    letter-spacing: 1px;
    flex-shrink: 0;
}
.exam-timer.warning { color: #ffd479; }
.exam-timer.danger { color: #ff9d9d; background: rgba(255,60,60,0.18); }

.exam-body { display: flex; gap: 22px; padding: 22px; max-width: 1180px; margin: 0 auto; align-items: flex-start; }
.exam-question-area { flex: 1; min-width: 0; }
.exam-sidebar { width: 250px; flex-shrink: 0; }

.nav-collapse summary {
    cursor: pointer;
    font-family: var(--font-serif);
    font-weight: bold;
    font-size: 15px;
    padding: 12px 16px;
    background: var(--paper);
    border: 1px solid var(--border);
    border-radius: var(--radius) var(--radius) 0 0;
    color: var(--navy);
    list-style: none;
}
.nav-collapse summary::-webkit-details-marker { display: none; }
.nav-collapse summary::after { content: '▾'; float: right; }
.nav-collapse:not([open]) summary { border-radius: var(--radius); border-bottom: 1px solid var(--border); }

.time-up-overlay {
    position: absolute;
    inset: 0;
    background: rgba(16, 35, 63, 0.92);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 20;
    padding: 20px;
}
.time-up-box {
    background: #fff;
    border-radius: 10px;
    padding: 28px 26px;
    max-width: 380px;
    text-align: center;
    box-shadow: 0 20px 50px rgba(0,0,0,0.3);
}
.time-up-box .time-up-title {
    font-family: var(--font-serif);
    font-size: 18px;
    font-weight: bold;
    color: var(--red-dark);
    margin-bottom: 10px;
}
.time-up-box p { font-size: 13.5px; color: var(--text-muted); margin-bottom: 18px; }

.question-card {
    background: var(--paper);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
}
.question-meta { font-size: 12px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 10px; }
.question-text { font-size: 16px; line-height: 1.7; margin-bottom: 22px; white-space: pre-line; }

.option-item {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    padding: 13px 16px;
    border: 1px solid var(--border);
    border-radius: 6px;
    margin-bottom: 10px;
    cursor: pointer;
}
.option-item:hover { background: var(--cream); }
.option-item.selected { border-color: var(--navy); background: #eef2f8; }
.option-item input { margin-top: 3px; }
.option-letter {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--cream);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: bold;
    flex-shrink: 0;
    color: var(--navy);
}
.option-item.selected .option-letter { background: var(--navy); color: #fff; border-color: var(--navy); }
.option-text { padding-top: 2px; font-size: 14.5px; }

.exam-nav-buttons { display: flex; justify-content: space-between; margin-top: 20px; }

.num-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; }
.num-grid button {
    aspect-ratio: 1;
    border: 1px solid var(--border);
    background: #fff;
    border-radius: 5px;
    font-family: var(--font-mono);
    font-size: 12px;
    cursor: pointer;
    color: var(--text);
}
.num-grid button.answered { background: var(--navy); color: #fff; border-color: var(--navy); }
.num-grid button.current { border-color: var(--red); border-width: 2px; }
.legend { display: flex; flex-direction: column; gap: 6px; font-size: 12px; margin-top: 14px; color: var(--text-muted); }
.legend .dot { width: 12px; height: 12px; border-radius: 3px; display: inline-block; margin-right: 6px; vertical-align: middle; }

/* ---------- Result page ---------- */
.score-hero {
    background: var(--navy);
    color: #fff;
    border-radius: var(--radius);
    padding: 30px 28px;
    text-align: center;
    margin-bottom: 20px;
    border-bottom: 4px solid var(--red);
}
.score-hero .score-num { font-family: var(--font-mono); font-size: 48px; font-weight: bold; }
.score-hero .score-label { font-size: 13px; color: #c9d3e0; text-transform: uppercase; letter-spacing: 1px; margin-top: 6px; }

.review-question { border-bottom: 1px solid var(--border); padding: 18px 0; }
.review-question:last-child { border-bottom: none; }
.review-option { padding: 8px 12px; border-radius: 6px; margin-bottom: 6px; font-size: 14px; border: 1px solid var(--border); }
.review-option.correct { background: var(--green-bg); border-color: #bfe0c8; }
.review-option.wrong-selected { background: var(--red-bg); border-color: #f0c4c4; }
.review-explanation {
    background: var(--cream);
    border-left: 3px solid var(--gold);
    padding: 12px 16px;
    margin-top: 10px;
    font-size: 13.5px;
    border-radius: 0 6px 6px 0;
}

.empty-state { text-align: center; padding: 50px 20px; color: var(--text-muted); }

/* ==================== RESPONSIVE ==================== */

/* Tablet & bawah */
@media (max-width: 860px) {
    .layout { flex-direction: column; }
    .sidebar {
        width: 100%;
        display: flex;
        overflow-x: auto;
        padding: 6px 8px;
        -webkit-overflow-scrolling: touch;
    }
    .sidebar a {
        white-space: nowrap;
        border-left: none;
        border-bottom: 3px solid transparent;
        padding: 10px 16px;
        flex-shrink: 0;
    }
    .sidebar a.active { border-left: none; border-bottom-color: var(--red); }
    .content { padding: 18px 16px; }

    .exam-body { flex-direction: column; padding: 14px; gap: 14px; }
    .exam-sidebar { width: 100%; }
    .exam-header { padding: 10px 14px; }
    .exam-timer { font-size: 18px; padding: 5px 12px; }

    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }

    table.data-table { display: block; }
    table.data-table thead { display: none; }
    /* Tabel data dibuat scroll horizontal alih-alih terpotong */
    .panel:has(table.data-table) { overflow-x: auto; }
}

/* Ponsel */
@media (max-width: 560px) {
    .topbar { padding: 10px 14px; flex-wrap: wrap; gap: 8px; }
    .topbar .brand-text .title { font-size: 14px; }
    .topbar .brand-text .subtitle { font-size: 10px; }
    .topbar .user-info { font-size: 12px; gap: 10px; }
    .topbar .user-info a { padding: 5px 10px; }

    h1.page-title { font-size: 19px; }
    .panel { padding: 16px 14px; }

    .score-hero .score-num { font-size: 34px; }

    .question-card { padding: 16px; }
    .question-text { font-size: 15px; }
    .option-item { padding: 11px 12px; }
    .option-text { font-size: 14px; }

    .exam-nav-buttons { flex-wrap: wrap; gap: 10px; }
    .exam-nav-buttons a, .exam-nav-buttons button { flex: 1; text-align: center; min-width: 130px; }

    .num-grid { grid-template-columns: repeat(6, 1fr); }
    .num-grid button { font-size: 11px; }

    .btn { width: 100%; text-align: center; }
    .btn-sm { width: auto; }
    form .btn { margin-bottom: 6px; }

    table.data-table th, table.data-table td { padding: 8px; font-size: 13px; }

    .login-wrap { padding: 14px; }
    .login-card { width: 100%; }
}

/* Landscape kecil / grid form pada layar sempit */
@media (max-width: 480px) {
    .grid-3, .grid-4 { grid-template-columns: 1fr 1fr; }
}