:root { color-scheme: light; --navy:#17365d; --blue:#2f75b5; --pale:#eaf3f9; --ink:#162033; --muted:#667085; --green:#2f6f3e; --green-bg:#e6f4e8; --red:#b42318; --red-bg:#feeceb; --amber:#8a5d00; --amber-bg:#fff3d2; --border:#d6e0ea; }
* { box-sizing: border-box; }
body { margin:0; font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif; color:var(--ink); background:#f4f7fa; }
a { color:var(--blue); }
.site-header { min-height:68px; padding:0 5vw; display:flex; align-items:center; gap:30px; background:var(--navy); color:#fff; }
.brand { color:#fff; font-size:20px; font-weight:750; text-decoration:none; }
.site-header nav { display:flex; align-items:center; gap:20px; }
.site-header nav a,.link-button { color:#fff; font:inherit; background:none; border:0; cursor:pointer; text-decoration:none; padding:0; }
.main-navigation { flex:1; }
.account-navigation { display:flex; align-items:center; gap:12px; }
.role-label { padding:5px 9px; border:1px solid rgba(255,255,255,.3); border-radius:999px; color:#dce9f5; font-size:12px; font-weight:750; }
.account-name { font-weight:700; }
.management-menu { position:relative; }
.management-menu > summary { display:flex; align-items:center; gap:7px; cursor:pointer; list-style:none; font-weight:750; }
.management-menu > summary::-webkit-details-marker { display:none; }
.management-menu > summary::after { content:"▾"; font-size:12px; }
.management-dropdown { position:absolute; z-index:20; top:34px; left:-14px; width:250px; display:grid; padding:9px; border:1px solid var(--border); border-radius:12px; background:#fff; box-shadow:0 16px 42px rgba(8,27,50,.25); }
.site-header .management-dropdown a { padding:10px 11px; border-radius:8px; color:var(--ink); font-size:14px; }
.site-header .management-dropdown a:hover { background:var(--pale); color:var(--navy); }
.site-header .management-dropdown .service-link { margin-top:6px; padding-top:12px; border-top:1px solid var(--border); color:var(--muted); }
.inline-form { display:inline; }
.page-shell { width:min(1120px,92vw); margin:42px auto 80px; }
.page-heading,.question-meta { display:flex; justify-content:space-between; align-items:flex-end; gap:24px; margin-bottom:24px; }
.invitation-heading { margin-top:36px; }
h1 { margin:4px 0 12px; font-size:clamp(30px,4vw,48px); line-height:1.05; }
h2 { line-height:1.35; }
.eyebrow { margin:0; color:var(--blue); font-weight:750; letter-spacing:.04em; text-transform:uppercase; font-size:13px; }
.muted { color:var(--muted); }
.compact { margin:6px 0 0; }
.version-badge,.status-pill { display:inline-flex; padding:7px 12px; border-radius:999px; background:var(--pale); color:var(--navy); font-size:13px; font-weight:700; }
.section-list,.user-list { display:grid; gap:14px; }
.section-card { display:grid; grid-template-columns:52px 1fr auto; gap:20px; align-items:center; padding:22px; border:1px solid var(--border); border-radius:16px; background:#fff; box-shadow:0 8px 28px rgba(23,54,93,.05); }
.user-card { display:grid; grid-template-columns:1fr auto; gap:22px; align-items:center; padding:22px; border:1px solid var(--border); border-radius:16px; background:#fff; box-shadow:0 8px 28px rgba(23,54,93,.05); }
.section-locked { opacity:.58; }
.section-order { width:44px; height:44px; border-radius:12px; display:grid; place-items:center; background:var(--navy); color:#fff; font-weight:800; }
.section-copy h2 { margin:0 0 5px; font-size:19px; }.section-copy p { color:var(--muted); margin:0; }
.section-action { display:flex; align-items:center; gap:12px; }
.primary-button { display:inline-block; border:0; border-radius:10px; padding:12px 18px; background:var(--blue); color:#fff; font-weight:750; font-size:15px; cursor:pointer; text-decoration:none; }
.secondary-button { border:1px solid var(--border); border-radius:10px; padding:11px 15px; background:#fff; color:var(--ink); font:inherit; font-weight:700; cursor:pointer; }
.secondary-button { display:inline-block; text-decoration:none; }
.auth-card,.question-card,.feedback-card,.result-card,.empty-state { max-width:780px; margin:0 auto; padding:34px; border:1px solid var(--border); background:#fff; border-radius:18px; box-shadow:0 14px 44px rgba(23,54,93,.08); }
.wide-card { max-width:900px; }
.stacked-form p { display:grid; gap:7px; }.stacked-form input,.stacked-form select { width:100%; min-height:44px; padding:10px 12px; border:1px solid #b9c7d4; border-radius:8px; font:inherit; }
.helptext { color:var(--muted); font-size:13px; }.errorlist,.error { color:#a61b1b; }
.answers-form { display:grid; gap:12px; margin-top:28px; }
.answer-option { display:flex; gap:12px; align-items:flex-start; padding:16px; border:1px solid var(--border); border-radius:12px; cursor:pointer; }
.answer-option:hover { border-color:var(--blue); background:var(--pale); }.answer-option input { margin-top:4px; }
.progress-track { height:9px; background:#dce6ef; border-radius:999px; overflow:hidden; margin-bottom:24px; }.progress-track span { display:block; height:100%; background:var(--blue); }
.feedback-correct { border-top:8px solid var(--green); }.feedback-incorrect { border-top:8px solid #b42318; }
.feedback-answer,.source-note,.one-time-secret,.selected-answer { margin:20px 0; padding:18px; border-radius:12px; background:var(--pale); }.source-note p { margin-bottom:0; }
.selected-answer { background:#f7f9fb; border:1px solid var(--border); }
.answer-breakdown { margin:28px 0; }
.answer-breakdown h3 { margin:0 0 12px; font-size:17px; }
.answer-breakdown-list { display:grid; gap:10px; }
.answer-review-option { display:grid; grid-template-columns:34px 1fr; gap:12px; align-items:flex-start; padding:15px; border:1px solid var(--border); border-radius:12px; background:#f7f9fb; }
.answer-review-icon { width:30px; height:30px; display:grid; place-items:center; border-radius:50%; background:#e4e9ef; color:var(--muted); font-size:18px; font-weight:900; }
.answer-review-copy p { margin:6px 0 0; line-height:1.45; }
.answer-review-labels { display:flex; flex-wrap:wrap; gap:7px; }
.answer-state-label,.your-answer-label { display:inline-flex; padding:4px 8px; border-radius:999px; background:#e8edf2; color:var(--muted); font-size:12px; font-weight:800; }
.answer-review-option.correct { border-color:#95c69f; background:var(--green-bg); }
.answer-review-option.correct .answer-review-icon { color:#fff; background:var(--green); }
.answer-review-option.correct .answer-state-label { color:var(--green); background:#d1ead6; }
.answer-review-option.selected-wrong { border-color:#e4a39e; background:var(--red-bg); }
.answer-review-option.selected-wrong .answer-review-icon { color:#fff; background:var(--red); }
.answer-review-option.selected-wrong .answer-state-label { color:var(--red); background:#f7d2cf; }
.your-answer-label { color:var(--navy); background:#d8e8f5; }
.score { font-size:72px; font-weight:850; color:var(--blue); }.message { margin-bottom:18px; padding:14px; border-radius:10px; background:var(--green-bg); color:var(--green); }

.attempt-toolbar { display:flex; align-items:center; justify-content:space-between; gap:18px; margin:0 0 26px; }
.back-link,.toolbar-link { color:var(--navy); font-weight:750; text-decoration:none; }
.toolbar-link { padding:9px 12px; border:1px solid var(--border); border-radius:9px; background:#fff; }
.attempt-stats { display:grid; grid-template-columns:1.35fr repeat(3,1fr); gap:10px; margin:0 0 12px; }
.attempt-stats > div { min-height:82px; display:flex; flex-direction:column; justify-content:center; padding:14px 16px; border:1px solid var(--border); border-radius:13px; background:#fff; }
.attempt-stats strong { font-size:24px; line-height:1; }
.attempt-stats span { margin-top:7px; color:var(--muted); font-size:13px; }
.attempt-stats .stat-primary { background:var(--navy); color:#fff; border-color:var(--navy); }
.attempt-stats .stat-primary span { color:#dbe8f4; }
.attempt-stats .stat-correct strong,.correct-text { color:var(--green); }
.attempt-stats .stat-wrong strong,.wrong-text { color:var(--red); }
.progress-row { display:grid; grid-template-columns:1fr auto; align-items:center; gap:14px; margin-bottom:20px; }
.progress-row .progress-track { margin:0; }
.progress-row > strong { color:var(--navy); font-size:14px; }

.question-navigator { max-width:900px; margin:0 auto 26px; border:1px solid var(--border); border-radius:14px; background:#fff; overflow:hidden; }
.question-navigator > summary { display:flex; align-items:center; justify-content:space-between; gap:16px; padding:15px 18px; cursor:pointer; color:var(--navy); font-weight:800; list-style:none; }
.question-navigator > summary::-webkit-details-marker { display:none; }
.question-navigator > summary::after { content:"+"; font-size:22px; line-height:1; }
.question-navigator[open] > summary::after { content:"−"; }
.question-navigator > summary small { margin-left:auto; color:var(--muted); font-weight:500; }
.navigator-body { padding:0 18px 18px; border-top:1px solid var(--border); }
.navigator-legend { display:flex; flex-wrap:wrap; gap:10px 20px; padding:14px 0; color:var(--muted); font-size:13px; }
.navigator-legend span { display:inline-flex; align-items:center; gap:7px; }
.legend-dot { width:11px; height:11px; border-radius:3px; background:#e9edf2; }
.legend-dot.correct { background:var(--green); }.legend-dot.wrong { background:var(--red); }.legend-dot.current { background:var(--blue); }.legend-dot.pending { border:1px solid #c9d2dc; }
.navigator-group { padding:0 0 9px; border-top:1px solid #edf1f5; }
.navigator-group:first-of-type { border-top:0; }
.navigator-group > summary { display:flex; justify-content:space-between; padding:10px 2px 7px; color:var(--muted); font-size:13px; font-weight:800; cursor:pointer; list-style:none; }
.navigator-group > summary::-webkit-details-marker { display:none; }
.navigator-group > summary::after { content:"+"; color:var(--blue); font-size:16px; }
.navigator-group[open] > summary::after { content:"−"; }
.question-number-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(38px,1fr)); gap:7px; }
.question-number { min-width:38px; height:38px; display:grid; place-items:center; border:1px solid #cdd6df; border-radius:8px; color:var(--muted); background:#eef2f6; font-size:13px; font-weight:800; text-decoration:none; }
a.question-number:hover { transform:translateY(-1px); box-shadow:0 3px 9px rgba(23,54,93,.16); }
.question-number.correct { color:#fff; background:var(--green); border-color:var(--green); }
.question-number.wrong { color:#fff; background:var(--red); border-color:var(--red); }
.question-number.current { color:#fff; background:var(--blue); border-color:var(--blue); box-shadow:0 0 0 3px rgba(47,117,181,.17); }
.question-number.selected { outline:3px solid var(--amber-bg); outline-offset:2px; }

.dashboard-progress { max-width:620px; margin-top:14px; }
.dashboard-progress-copy { display:flex; flex-wrap:wrap; gap:5px 13px; color:var(--muted); font-size:13px; }
.dashboard-progress-copy strong { color:var(--navy); }
.dashboard-progress .progress-track { height:7px; margin:9px 0 0; }
.attempt-overview-heading { align-items:center; }
.attempt-overview-heading .muted { max-width:720px; }
.review-card { margin-top:28px; }
.review-navigation { display:flex; align-items:center; justify-content:space-between; gap:12px; margin-top:26px; }
.answer-review-list { max-width:900px; margin:28px auto 0; padding:28px; border:1px solid var(--border); border-radius:18px; background:#fff; }
.review-list-heading { display:flex; align-items:flex-end; justify-content:space-between; gap:20px; margin-bottom:18px; }
.review-list-heading h2 { margin:4px 0 0; }
.filter-tabs { display:flex; flex-wrap:wrap; gap:7px; }
.filter-tabs a { padding:8px 11px; border:1px solid var(--border); border-radius:999px; color:var(--muted); text-decoration:none; font-size:13px; font-weight:700; }
.filter-tabs a.active { color:#fff; border-color:var(--navy); background:var(--navy); }
.review-list-item { display:grid; grid-template-columns:42px 1fr auto; align-items:center; gap:14px; padding:15px 0; border-top:1px solid var(--border); color:var(--ink); text-decoration:none; }
.review-list-item strong { font-size:13px; white-space:nowrap; }
.review-list-item.correct strong { color:var(--green); }.review-list-item.wrong strong { color:var(--red); }
.review-position { width:38px; height:38px; display:grid; place-items:center; border-radius:9px; color:#fff; background:var(--navy); font-weight:800; }
.empty-inline { padding:18px; border-radius:12px; background:var(--green-bg); color:var(--green); }

.staff-section-nav { display:flex; flex-wrap:wrap; gap:7px; margin:-10px 0 30px; padding:7px; border:1px solid var(--border); border-radius:13px; background:#fff; }
.staff-section-nav a { padding:9px 12px; border-radius:8px; color:var(--muted); font-size:13px; font-weight:750; text-decoration:none; }
.staff-section-nav a:hover { color:var(--navy); background:var(--pale); }
.staff-section-nav a.active { color:#fff; background:var(--navy); }
.management-stats { display:grid; grid-template-columns:repeat(4,1fr); gap:13px; margin-bottom:28px; }
.management-stats article { min-height:145px; display:flex; flex-direction:column; padding:20px; border:1px solid var(--border); border-radius:15px; background:#fff; box-shadow:0 8px 28px rgba(23,54,93,.05); }
.management-stats strong { color:var(--navy); font-size:36px; line-height:1; }
.management-stats span { margin-top:10px; font-weight:750; }
.management-stats small { margin-top:auto; padding-top:14px; color:var(--muted); }
.management-panel { padding:26px; border:1px solid var(--border); border-radius:17px; background:#fff; box-shadow:0 8px 28px rgba(23,54,93,.05); }
.panel-heading { display:flex; align-items:flex-end; justify-content:space-between; gap:20px; margin-bottom:18px; }
.panel-heading h2 { margin:4px 0 0; }
.panel-heading a { font-weight:750; text-decoration:none; }
.data-table-wrap { width:100%; overflow-x:auto; }
.data-table { width:100%; border-collapse:collapse; font-size:14px; }
.data-table th { padding:11px 12px; border-bottom:2px solid var(--border); color:var(--muted); text-align:left; font-size:12px; letter-spacing:.03em; text-transform:uppercase; white-space:nowrap; }
.data-table td { padding:14px 12px; border-bottom:1px solid #e8edf2; vertical-align:top; }
.data-table tbody tr:last-child td { border-bottom:0; }
.data-table small { color:var(--muted); }
.result-badge { display:inline-flex; padding:5px 8px; border-radius:999px; font-size:12px; font-weight:800; white-space:nowrap; }
.result-badge.passed { color:var(--green); background:var(--green-bg); }
.result-badge.failed { color:var(--red); background:var(--red-bg); }
.inline-filter { display:grid; gap:5px; min-width:250px; }
.inline-filter label { color:var(--muted); font-size:12px; font-weight:750; }
.inline-filter select { min-height:42px; padding:8px 34px 8px 11px; border:1px solid var(--border); border-radius:9px; background:#fff; font:inherit; }
.pack-summary { display:grid; grid-template-columns:1fr 1fr 1.4fr; gap:12px; margin-bottom:22px; }
.pack-summary > div { display:flex; flex-direction:column; gap:7px; padding:17px; border:1px solid var(--border); border-radius:13px; background:#fff; }
.pack-summary span { color:var(--muted); font-size:12px; }
.pack-summary code { overflow-wrap:anywhere; color:var(--navy); }
.management-section-list { margin-bottom:20px; }
.management-note { padding:16px 18px; border-left:4px solid var(--blue); border-radius:8px; background:var(--pale); color:var(--navy); }

@media (max-width:760px) {
  .site-header { align-items:flex-start; flex-wrap:wrap; padding-block:16px; gap:12px 18px; }.site-header nav { flex-wrap:wrap; justify-content:flex-start; gap:10px 14px; }
  .brand { width:100%; }
  .main-navigation { order:2; flex-basis:100%; }
  .account-navigation { order:1; flex:1; flex-wrap:wrap; justify-content:flex-end; }
  .management-dropdown { position:fixed; top:auto; left:5vw; right:5vw; width:auto; margin-top:8px; }
  .page-shell { margin-top:24px; }
  .section-card { grid-template-columns:44px 1fr; }.user-card { grid-template-columns:1fr; }.section-action { grid-column:1/-1; justify-content:flex-start; flex-wrap:wrap; }.page-heading,.question-meta { align-items:flex-start; flex-direction:column; }
  .attempt-toolbar { margin-bottom:20px; }
  .attempt-stats { grid-template-columns:repeat(2,1fr); }
  .question-navigator > summary small { display:none; }
  .question-number-grid { grid-template-columns:repeat(5,1fr); }
  .review-list-heading { align-items:flex-start; flex-direction:column; }
  .review-list-item { grid-template-columns:38px 1fr; }
  .review-list-item strong { grid-column:2; }
  .review-navigation { align-items:stretch; flex-direction:column; }
  .staff-section-nav { flex-wrap:wrap; }
  .staff-section-nav a { white-space:nowrap; }
  .management-stats { grid-template-columns:repeat(2,1fr); }
  .pack-summary { grid-template-columns:1fr; }
  .panel-heading { align-items:flex-start; flex-direction:column; }
}
@media (max-width:460px) {
  .role-label { display:none; }
  .management-stats { grid-template-columns:1fr; }
}
.material-image-scroll { overflow-x: auto; margin-bottom: 24px; background: white; }
.material-image { display: block; width: 100%; min-width: 600px; height: auto; }
.image-answer-option { display: flex; align-items: center; padding: 0; gap: 10px; min-width: 0; border: 0; border-radius: 0; }
.image-answer-option:hover { background: transparent; border: 0; }
.image-answer-option input { flex: 0 0 auto; width: 20px; height: 20px; margin: 0; align-self: center; accent-color: var(--blue); }
.answer-image-scroll { display: block; flex: 1; min-width: 0; overflow-x: auto; }
.image-answer-option input:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; }