:root {
  --bg: #f4f6f8;
  --panel: #ffffff;
  --panel-subtle: #f9fafb;
  --text: #17202a;
  --muted: #667085;
  --line: #d7dde5;
  --line-strong: #b7c0cc;
  --primary: #2563eb;
  --primary-strong: #1d4ed8;
  --teal: #0f766e;
  --good: #16803c;
  --bad: #b42318;
  --soft-blue: #eef4ff;
  --soft-teal: #ecfdf7;
  --soft-good: #ecfdf3;
  --soft-bad: #fff1f0;
  --soft-amber: #fff7ed;
  --amber: #b45309;
  --shadow: 0 10px 28px rgba(20, 29, 38, 0.08);
}

:root[data-theme="dark"] {
  --bg: #101720;
  --panel: #182230;
  --panel-subtle: #202b3a;
  --text: #edf2f7;
  --muted: #a8b3c4;
  --line: #344256;
  --line-strong: #516073;
  --primary: #60a5fa;
  --primary-strong: #93c5fd;
  --teal: #2dd4bf;
  --good: #4ade80;
  --bad: #f87171;
  --soft-blue: #172b49;
  --soft-teal: #123c37;
  --soft-good: #143522;
  --soft-bad: #3b1d1a;
  --soft-amber: #3a2a14;
  --amber: #fbbf24;
  --shadow: 0 12px 30px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

button,
input,
select {
  font: inherit;
}

button {
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  color: var(--text);
  min-height: 38px;
  padding: 8px 12px;
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

button:hover:not(:disabled) {
  border-color: var(--primary);
}

button.primary,
#mockBtn,
#nextQuestionBtn {
  border-color: var(--primary);
  background: var(--primary);
  color: #fff;
}

button.primary:hover,
#mockBtn:hover,
#nextQuestionBtn:hover {
  background: var(--primary-strong);
}

button.danger {
  border-color: var(--bad);
  background: var(--bad);
  color: #fff;
  width: 100%;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: center;
  padding: 14px 28px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
}

:root[data-theme="dark"] .topbar {
  background: rgba(24, 34, 48, 0.96);
}

.topbar h1,
.topbar p,
h2,
h3 {
  margin: 0;
}

.topbar h1 {
  font-size: 18px;
  font-weight: 750;
}

.topbar p,
.question-meta,
.card-stats,
.progress-text,
.exam-header p {
  color: var(--muted);
  font-size: 13px;
}

.topnav {
  display: flex;
  align-items: center;
  gap: 10px;
}

.app-nav,
.admin-nav {
  display: none;
}

body.app-ready .app-nav,
body.admin-authenticated .admin-nav {
  display: inline-flex;
}

.topnav a {
  color: var(--primary-strong);
  text-decoration: none;
  padding: 8px 10px;
}

main {
  width: min(1480px, calc(100vw - 48px));
  margin: 0 auto;
  padding: 24px 0 48px;
}

.login-panel {
  display: grid;
  gap: 14px;
  width: min(420px, 100%);
  margin: 72px auto 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
  padding: 22px;
}

.login-panel h2,
.login-panel p {
  margin: 0;
}

.login-panel p {
  color: var(--muted);
  font-size: 14px;
}

.setup-help {
  display: none;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-subtle);
  padding: 10px;
  color: var(--muted);
  font-size: 13px;
}

body.auth-unconfigured .setup-help {
  display: grid;
}

body.auth-unconfigured .login-credentials {
  display: none;
}

.setup-help code {
  display: block;
  overflow-x: auto;
  color: var(--text);
  white-space: nowrap;
}

.view {
  display: none;
}

.view.active {
  display: block;
}

.catalog-hero {
  display: grid;
  grid-template-columns: minmax(320px, 1fr) minmax(520px, 0.95fr);
  gap: 18px;
  align-items: stretch;
  margin-bottom: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
  padding: 18px;
}

.eyebrow {
  display: inline-flex;
  margin-bottom: 8px;
  color: var(--teal);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.catalog-hero h2 {
  margin: 0 0 8px;
  font-size: 28px;
  line-height: 1.1;
}

.catalog-hero p {
  max-width: 680px;
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
}

.metric-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.metric-strip article {
  display: grid;
  align-content: center;
  gap: 6px;
  min-height: 104px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-subtle);
  padding: 12px;
}

.metric-strip span {
  color: var(--muted);
  font-size: 12px;
}

.metric-strip strong {
  font-size: 24px;
  line-height: 1;
}

.controls {
  display: grid;
  grid-template-columns: minmax(170px, 220px) minmax(260px, 1fr) minmax(150px, 190px) minmax(150px, 190px);
  gap: 14px;
  align-items: end;
  margin-bottom: 18px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.checkbox-control {
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  color: var(--text);
}

.checkbox-control input {
  width: 18px;
  min-height: 18px;
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 13px;
}

input,
select {
  width: 100%;
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--text);
  padding: 8px 10px;
}

:root[data-theme="dark"] input,
:root[data-theme="dark"] select {
  background: #111827;
}

.exam-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 14px;
}

.exam-card,
.question-card,
.result-card,
.metric-card,
.insight-panel,
.mode-prompt,
.mock-sidebar {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.exam-card {
  display: grid;
  gap: 12px;
  min-height: 178px;
  padding: 16px;
  cursor: pointer;
}

.exam-card:hover {
  border-color: var(--primary);
}

.exam-card.retired {
  background: linear-gradient(180deg, var(--panel), var(--panel-subtle));
}

.exam-card h3 {
  font-size: 17px;
  line-height: 1.25;
}

.exam-card p {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.code-chip {
  display: inline-flex;
  min-height: 22px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel-subtle);
  color: var(--text);
  padding: 2px 8px;
  font-size: 12px;
  font-weight: 700;
}

.card-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-self: end;
}

.card-history {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  border-radius: 999px;
  background: var(--soft-blue);
  color: var(--primary-strong);
  padding: 3px 9px;
  font-size: 12px;
}

.score-pill {
  background: var(--soft-good);
  color: var(--good);
}

.saved-pill {
  background: var(--soft-amber);
  color: var(--amber);
}

.visual-pill {
  background: var(--soft-teal);
  color: var(--teal);
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 24px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--panel-subtle);
  color: var(--muted);
  padding: 3px 9px;
  font-size: 12px;
  font-weight: 700;
}

.status-badge::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: currentColor;
}

.status-badge.active {
  border-color: #7cc99c;
  background: var(--soft-good);
  color: var(--good);
}

.status-badge.retired {
  border-color: #f0a6a0;
  background: var(--soft-bad);
  color: var(--bad);
}

.exam-header,
.results-header {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 16px;
  margin-bottom: 18px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.exam-header h2,
.results-header h2 {
  font-size: 24px;
  line-height: 1.2;
}

.exam-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.status-note {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  margin-bottom: 14px;
  border: 1px solid #f0a6a0;
  border-left: 4px solid var(--bad);
  border-radius: 8px;
  background: var(--soft-bad);
  color: var(--bad);
  padding: 12px 14px;
}

.status-note span {
  color: var(--muted);
  font-size: 13px;
}

.mode-prompt {
  padding: 22px;
}

.mode-prompt h3 {
  font-size: 18px;
  margin-bottom: 6px;
}

.mode-prompt p {
  margin: 0;
  color: var(--muted);
}

.exam-dashboard {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 14px;
}

.metric-card {
  display: grid;
  gap: 6px;
  min-height: 118px;
  padding: 16px;
}

.metric-card span,
.metric-card small {
  color: var(--muted);
  font-size: 13px;
}

.metric-card strong {
  font-size: 28px;
  line-height: 1;
}

.practice-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 12px;
  margin-bottom: 14px;
}

.practice-card {
  display: grid;
  gap: 6px;
  min-height: 122px;
  align-content: center;
  border-radius: 8px;
  padding: 16px;
  text-align: left;
  background: var(--panel);
}

.practice-card span,
.practice-card small {
  color: var(--muted);
  font-size: 13px;
}

.practice-card strong {
  font-size: 20px;
}

.practice-card.primary-card {
  border-color: var(--primary);
  background: var(--primary);
  color: #fff;
}

.practice-card.primary-card span,
.practice-card.primary-card small {
  color: rgba(255, 255, 255, 0.82);
}

.insight-panel,
.topic-breakdown {
  margin-bottom: 14px;
  padding: 16px;
}

.admin-shell {
  display: grid;
  grid-template-columns: minmax(360px, 0.9fr) minmax(0, 1.1fr);
  gap: 14px;
  align-items: start;
  margin-bottom: 14px;
}

.admin-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
  padding: 16px;
}

.admin-panel h2,
.admin-panel p {
  margin: 0;
}

.admin-panel p {
  color: var(--muted);
  line-height: 1.45;
}

.admin-form {
  display: grid;
  gap: 12px;
  margin-top: 16px;
}

.admin-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.admin-actions button {
  display: grid;
  gap: 2px;
  min-width: 132px;
  text-align: left;
}

.admin-actions button strong {
  font-size: 13px;
}

.admin-actions button span {
  color: var(--muted);
  font-size: 11px;
}

.admin-actions button.primary span {
  color: rgba(255, 255, 255, 0.76);
}

.admin-hint {
  font-size: 13px;
}

.admin-output {
  display: grid;
  gap: 12px;
}

.coverage-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 8px;
}

.coverage-metrics article {
  display: grid;
  gap: 5px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-subtle);
  padding: 10px;
}

.coverage-metrics.compact {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.coverage-metrics span {
  color: var(--muted);
  font-size: 12px;
}

.coverage-metrics strong {
  font-size: 20px;
}

.coverage-exam,
.coverage-section,
.job-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-subtle);
  padding: 12px;
}

.coverage-exam h4,
.coverage-section h4,
.job-card h4 {
  margin: 0;
  font-size: 15px;
}

.topic-gap-list {
  display: grid;
  gap: 8px;
  margin-top: 10px;
}

.topic-gap-list div,
.error-row,
.job-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  color: var(--muted);
  font-size: 13px;
}

.coverage-ok {
  margin-top: 10px;
  border: 1px solid #7cc99c;
  border-radius: 6px;
  background: var(--soft-good);
  color: var(--good);
  padding: 9px 10px;
  font-size: 13px;
}

.coverage-warning {
  margin-top: 10px;
  border: 1px solid #f0c36a;
  border-radius: 6px;
  background: var(--soft-amber);
  color: var(--amber);
  padding: 9px 10px;
  font-size: 13px;
}

.error-row-list {
  display: grid;
  gap: 8px;
  margin-top: 10px;
}

.missing-links {
  display: grid;
  gap: 6px;
  max-height: 260px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  padding: 8px;
  color: var(--muted);
  font-size: 12px;
}

.job-list {
  display: grid;
  gap: 10px;
}

.job-card.running {
  border-color: var(--primary);
}

.job-card.failed {
  border-color: var(--bad);
}

.job-card.completed {
  border-color: var(--good);
}

.job-progress {
  overflow: hidden;
  height: 8px;
  margin-top: 12px;
  border-radius: 999px;
  background: var(--line);
}

.job-progress span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--primary);
  transition: width 180ms ease;
}

.job-progress-label {
  margin-top: 6px;
  color: var(--muted);
  font-size: 12px;
}

.job-card pre {
  max-height: 360px;
  overflow: auto;
  margin: 12px 0 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #0b1220;
  color: #dbeafe;
  padding: 10px;
  font-size: 12px;
  line-height: 1.45;
  white-space: pre-wrap;
}

.panel-title {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  margin-bottom: 12px;
}

.panel-title h3 {
  font-size: 16px;
}

.panel-title span {
  color: var(--muted);
  font-size: 13px;
}

.topic-list,
.attempt-list {
  display: grid;
  gap: 8px;
}

.topic-row,
.attempt-row {
  display: grid;
  align-items: center;
  gap: 10px;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel-subtle);
  padding: 9px 10px;
}

.topic-row {
  grid-template-columns: 1fr auto;
}

.attempt-row {
  grid-template-columns: 72px 1fr 110px 90px 150px;
}

.attempt-row span,
.topic-row span {
  color: var(--muted);
  font-size: 13px;
}

.study-toolbar {
  position: sticky;
  top: 70px;
  z-index: 15;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  margin-bottom: 14px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: var(--shadow);
}

:root[data-theme="dark"] .study-toolbar {
  background: rgba(24, 34, 48, 0.96);
}

.study-toolbar span {
  margin-left: 12px;
  color: var(--muted);
  font-size: 13px;
}

.question-list {
  display: grid;
  gap: 14px;
}

.question-card {
  padding: 18px;
}

.question-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: start;
  margin-bottom: 12px;
}

.question-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.save-btn.saved {
  border-color: var(--amber);
  background: var(--soft-amber);
  color: var(--amber);
}

.question-card.saved {
  border-color: color-mix(in srgb, var(--amber) 42%, var(--line));
}

.question-card h3 {
  font-size: 17px;
}

.question-text {
  margin: 0;
  white-space: pre-wrap;
  line-height: 1.55;
  font-size: 15px;
}

.media-block {
  margin-top: 14px;
}

.media-label {
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 13px;
}

.media-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.media-row img {
  max-width: min(100%, 780px);
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
}

:root[data-theme="dark"] .media-row img {
  background: #0b1220;
}

.options {
  display: grid;
  gap: 9px;
  margin-top: 16px;
}

.option {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 10px;
  align-items: start;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 11px 12px;
  text-align: left;
  line-height: 1.45;
}

:root[data-theme="dark"] .option {
  background: #111827;
}

button.option {
  min-height: auto;
  color: var(--text);
  cursor: pointer;
}

button.option:disabled {
  cursor: default;
  opacity: 1;
}

.option input {
  width: 18px;
  min-height: 18px;
  margin-top: 2px;
}

.choice-key {
  display: inline-grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: 999px;
  background: var(--panel-subtle);
  color: var(--muted);
  font-weight: 700;
  font-size: 12px;
}

.option.correct {
  border-color: #7cc99c;
  background: var(--soft-good);
}

.option.wrong {
  border-color: #f0a6a0;
  background: var(--soft-bad);
}

.answer-panel,
.hint-box {
  margin-top: 16px;
  border: 1px solid #b7d7f8;
  border-left: 4px solid var(--primary);
  border-radius: 6px;
  background: var(--soft-blue);
  padding: 12px 14px;
  line-height: 1.45;
}

.hint-box {
  color: var(--muted);
}

.reference {
  margin-top: 10px;
  white-space: pre-wrap;
  color: var(--muted);
}

.mock-shell {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 18px;
}

.mock-sidebar {
  position: sticky;
  top: 88px;
  align-self: start;
  padding: 16px;
}

.timer {
  font-size: 26px;
  font-weight: 800;
  margin-bottom: 6px;
}

.mock-nav {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 6px;
  margin: 16px 0;
}

.mock-nav button {
  min-height: 34px;
  padding: 0;
}

.mock-nav button.answered {
  border-color: var(--primary);
  background: var(--soft-blue);
}

.mock-nav button.current {
  border-color: var(--primary);
  background: var(--primary);
  color: #fff;
}

.mock-nav button.correct {
  border-color: var(--good);
  background: var(--soft-good);
}

.mock-nav button.wrong {
  border-color: var(--bad);
  background: var(--soft-bad);
}

.mock-main {
  min-width: 0;
}

.mock-footer {
  display: flex;
  justify-content: space-between;
  margin-top: 14px;
}

.results-list {
  display: grid;
  gap: 10px;
}

.topic-breakdown {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 8px;
}

.topic-score {
  display: grid;
  gap: 4px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel-subtle);
  padding: 10px;
}

.topic-score span,
.topic-score small {
  color: var(--muted);
  font-size: 12px;
}

.topic-score strong {
  font-size: 20px;
}

.result-card {
  display: grid;
  grid-template-columns: 10px 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 12px;
  cursor: pointer;
}

.result-card p {
  margin: 4px 0 5px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.35;
}

.result-card .status-bar {
  width: 10px;
  height: 100%;
  min-height: 52px;
  border-radius: 99px;
  background: var(--good);
}

.result-card.wrong .status-bar {
  background: var(--bad);
}

.empty {
  border: 1px dashed var(--line-strong);
  border-radius: 8px;
  padding: 24px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.7);
}

:root[data-theme="dark"] .empty {
  background: rgba(24, 34, 48, 0.7);
}

@media (max-width: 920px) {
  .topbar,
  .catalog-hero,
  .exam-header,
  .results-header,
  .study-toolbar {
    grid-template-columns: 1fr;
    display: grid;
  }

  main {
    width: min(100vw - 24px, 1480px);
  }

  .controls,
  .admin-shell,
  .metric-strip,
  .exam-dashboard,
  .practice-grid,
  .mock-shell {
    grid-template-columns: 1fr;
  }

  .attempt-row {
    grid-template-columns: 1fr 1fr;
  }

  .coverage-metrics.compact {
    grid-template-columns: 1fr 1fr;
  }

  .mock-sidebar,
  .study-toolbar {
    position: static;
  }

  .exam-grid {
    grid-template-columns: 1fr;
  }
}