:root {
    --bg: #f4f7fb;
    --card: #fff;
    --text: #142033;
    --muted: #667085;
    --primary: #2457ff;
    --primary2: #7c3aed;
    --success: #16a34a;
    --warning: #f59e0b;
    --danger: #dc2626;
    --border: #d9e2ef;
    --soft: #eef4ff;
    --shadow: 0 20px 55px rgba(15,23,42,.1);
    --radius: 20px;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(36,87,255,.18), transparent 30%),
        radial-gradient(circle at top right, rgba(124,58,237,.16), transparent 28%),
        var(--bg);
    line-height: 1.5;
}
a { color: inherit; text-decoration: none; }
.container { width: min(1200px, 94%); margin: 0 auto; padding: 24px 0 60px; }
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
    margin-bottom: 16px;
}
h1, h2, h3 { letter-spacing: -.02em; margin-top: 0; }
p { margin-top: 0; }
.btn {
    border: 1px solid var(--border);
    background: #fff;
    color: var(--text);
    padding: 10px 14px;
    border-radius: 12px;
    cursor: pointer;
    font-weight: 800;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}
.btn.primary {
    background: linear-gradient(135deg, var(--primary), var(--primary2));
    border: 0;
    color: #fff;
    box-shadow: 0 12px 26px rgba(36,87,255,.22);
}
.btn.full { width: 100%; }
.btn.small { padding: 7px 10px; font-size: 13px; }
.link-btn {
    background: none;
    border: 0;
    color: #fff;
    cursor: pointer;
    font-weight: 800;
    font-size: 15px;
}
.inline { display: inline; }
label {
    display: block;
    font-size: 13px;
    font-weight: 900;
    color: #344054;
    margin-bottom: 6px;
}
input, textarea, select {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 13px;
    padding: 11px 12px;
    font-size: 14px;
    outline: 0;
    background: #fbfdff;
    color: var(--text);
}
input:focus, textarea:focus, select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(36,87,255,.12);
}
textarea { resize: vertical; }
.alert {
    padding: 13px 14px;
    border-radius: 14px;
    margin-bottom: 14px;
    font-weight: 700;
}
.alert.success { background: #dcfce7; color: #166534; }
.alert.danger { background: #fee2e2; color: #991b1b; }

.auth-body {
    min-height: 100vh;
    display: grid;
    place-items: center;
}
.login-wrap { width: min(440px, 92%); }
.login-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 28px;
    padding: 28px;
    box-shadow: var(--shadow);
}
.login-brand {
    display: inline-flex;
    border-radius: 999px;
    padding: 7px 12px;
    background: #eef4ff;
    color: var(--primary);
    font-weight: 900;
    font-size: 13px;
    margin-bottom: 12px;
}

.admin-header {
    background: linear-gradient(135deg, #0f172a, #1d4ed8);
    color: #fff;
    padding: 14px 3%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
}
.admin-header span {
    display: block;
    color: #bfdbfe;
    font-size: 13px;
}
.admin-header nav {
    display: flex;
    gap: 14px;
    align-items: center;
    flex-wrap: wrap;
}
.page-head {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: flex-start;
    margin-bottom: 16px;
}
.page-head p { color: var(--muted); }
.table-wrap { overflow-x: auto; }
table {
    width: 100%;
    border-collapse: collapse;
}
th, td {
    border-bottom: 1px solid var(--border);
    padding: 12px;
    text-align: left;
    vertical-align: top;
}
th { font-size: 13px; color: #475467; }
small { color: var(--muted); }
.status {
    display: inline-flex;
    padding: 6px 9px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 900;
    background: #eef2ff;
    color: #3730a3;
}
.status.created { background: #f8fafc; color: #475467; }
.status.in_progress { background: #dbeafe; color: #1d4ed8; }
.status.grace { background: #fef3c7; color: #92400e; }
.status.locked { background: #fee2e2; color: #991b1b; }
.status.finished { background: #dcfce7; color: #166534; }

.grid-form {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
}
.field.span-2, .span-2 { grid-column: span 2; }
.grid-2 {
    display: grid;
    grid-template-columns: 1.2fr .8fr;
    gap: 16px;
}
.copy-box input { font-weight: 800; color: var(--primary); }
.report-score {
    background: #0f172a;
    color: #fff;
}
.report-score span { color: #bfdbfe; font-weight: 800; }
.report-score strong { display: block; font-size: 56px; line-height: 1; margin: 8px 0; }
.report-score em {
    display: inline-flex;
    background: rgba(255,255,255,.12);
    padding: 7px 10px;
    border-radius: 999px;
    font-style: normal;
    font-weight: 900;
    margin-bottom: 10px;
}
.answer-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}
.answer-item {
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 14px;
    background: #fbfdff;
}
.rubric-group {
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 14px;
    margin-bottom: 12px;
}
.rubric-title {
    display: flex;
    justify-content: space-between;
    border-bottom: 1px solid var(--border);
    margin-bottom: 10px;
    gap: 12px;
}
.rubric-title span {
    font-weight: 900;
    color: var(--primary);
}
.checkline {
    display: flex;
    gap: 9px;
    align-items: flex-start;
    padding: 9px;
    border-radius: 12px;
    background: #f8fafc;
    margin-bottom: 7px;
}
.checkline input {
    width: auto;
    margin-top: 4px;
    accent-color: var(--primary);
}
.file-list {
    list-style: none;
    padding: 0;
    display: grid;
    gap: 8px;
}
.file-list li {
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 13px;
    background: #f8fafc;
}
.file-list small { display: block; }

.exam-page {
    width: min(1120px, 94%);
    margin: 0 auto;
    padding: 22px 0 60px;
}
.exam-hero {
    background: linear-gradient(135deg, #0f172a, #1d4ed8 55%, #6d28d9);
    color: #fff;
    border-radius: 28px;
    padding: 26px;
    box-shadow: var(--shadow);
    display: grid;
    grid-template-columns: 1.4fr .6fr;
    gap: 18px;
    align-items: center;
    margin-bottom: 16px;
}
.badge {
    display: inline-flex;
    padding: 7px 12px;
    border-radius: 999px;
    background: rgba(255,255,255,.13);
    border: 1px solid rgba(255,255,255,.18);
    color: #dbeafe;
    font-weight: 900;
    font-size: 13px;
    margin-bottom: 12px;
}
.exam-hero h1 {
    font-size: clamp(26px, 4vw, 42px);
    line-height: 1.05;
}
.timer-box {
    background: rgba(255,255,255,.13);
    border: 1px solid rgba(255,255,255,.18);
    border-radius: 22px;
    padding: 18px;
    text-align: center;
}
.timer-box span, .timer-box small {
    display: block;
    color: #bfdbfe;
    font-weight: 800;
}
.timer-box strong {
    display: block;
    font-size: clamp(38px, 7vw, 62px);
    line-height: 1;
    margin: 8px 0;
}
.start-card {
    border-left: 6px solid var(--primary);
}
.question {
    border: 1px solid var(--border);
    background: #fbfdff;
    border-radius: 16px;
    padding: 14px;
    margin-bottom: 12px;
}
.actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}
.lock-banner {
    display: none;
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
    border-radius: 20px;
    padding: 18px;
    margin-bottom: 16px;
}
.lock-banner.show { display: block; }
.lock-banner h2 { margin-bottom: 4px; }
body.locked .exam-field,
body.locked #evidenceInput,
body.locked #uploadForm button,
body.locked #manualSaveBtn,
body.locked #finishBtn {
    pointer-events: none;
    opacity: .65;
}
body.locked .exam-field {
    background: #f1f5f9;
}

@media (max-width: 900px) {
    .admin-header, .page-head { flex-direction: column; }
    .grid-form, .grid-2, .answer-grid, .exam-hero { grid-template-columns: 1fr; }
    .field.span-2, .span-2 { grid-column: span 1; }
}
@media print {
    body { background: #fff; }
    .admin-header, .btn, form button { display: none !important; }
    .container, .exam-page { width: 100%; padding: 0; }
    .card, .answer-item, .rubric-group { box-shadow: none; border-color: #999; page-break-inside: avoid; }
    .report-score { background: #fff; color: #000; border-color: #999; }
}


.hidden { display: none !important; }

.case-main h2,
.case-info-grid h2 {
    margin-bottom: 12px;
}

.case-notice {
    border-left: 5px solid var(--primary);
    background: #eff6ff;
    color: #1e3a8a;
    border-radius: 14px;
    padding: 14px;
    margin: 12px 0;
}

.case-box {
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 16px;
    background: #fbfdff;
    margin-top: 12px;
}

.case-box.soft {
    background: linear-gradient(180deg, #fbfdff, #f8fafc);
}

.flow-grid {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 10px;
    margin-top: 12px;
}

.flow-item {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 13px 10px;
    min-height: 98px;
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
}

.flow-icon {
    font-size: 24px;
}

.flow-item small {
    color: var(--muted);
    font-weight: 700;
}

.case-info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.case-info-grid ul {
    margin: 8px 0 0 20px;
}

.rule-box {
    border-left: 5px solid var(--warning);
    background: #fffbeb;
    color: #92400e;
    border-radius: 14px;
    padding: 14px;
}

.grace-banner {
    display: none;
    background: #fffbeb;
    color: #92400e;
    border: 1px solid #fde68a;
    border-radius: 20px;
    padding: 18px;
    margin-bottom: 16px;
}

.grace-banner.show {
    display: block;
}

body.locked #caseSection,
body.locked #caseInfoGrid,
body.locked #importantRule {
    display: none !important;
}

@media (max-width: 1100px) {
    .flow-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 760px) {
    .case-info-grid {
        grid-template-columns: 1fr;
    }
    .flow-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 460px) {
    .flow-grid {
        grid-template-columns: 1fr;
    }
}


.evidence-list {
    gap: 10px;
}

.evidence-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 14px;
}

.evidence-info {
    min-width: 0;
}

.evidence-info strong {
    display: block;
    word-break: break-word;
}

.evidence-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.evidence-view {
    background: #eef4ff;
    color: #1d4ed8;
    border-color: #bfdbfe;
}

@media (max-width: 680px) {
    .evidence-item {
        flex-direction: column;
        align-items: flex-start;
    }

    .evidence-actions {
        justify-content: flex-start;
        width: 100%;
    }
}


.reading-banner {
    display: none;
    background: #eff6ff;
    color: #1e3a8a;
    border: 1px solid #bfdbfe;
    border-radius: 20px;
    padding: 18px;
    margin-bottom: 16px;
}

.reading-banner.show {
    display: block;
}