:root {
  color-scheme: light;
  --ink: #17211f;
  --muted: #5a6764;
  --surface: #ffffff;
  --surface-alt: #eef4f2;
  --border: #cbd7d3;
  --brand: #163b36;
  --brand-hover: #0e2f2a;
  --brand-soft: #dcebe7;
  --correct: #17683d;
  --correct-bg: #e8f5ed;
  --incorrect: #a12929;
  --incorrect-bg: #fff0ef;
  --warning: #8a5200;
  --focus: #075fc8;
  --shadow: 0 12px 32px rgb(14 47 42 / 10%);
  --radius: 16px;
}

* { box-sizing: border-box; }

html { min-height: 100%; }

body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  background: linear-gradient(180deg, #f6faf8 0, #edf4f1 100%);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
}

button, select, input { font: inherit; }
button, select { touch-action: manipulation; }

button:focus-visible,
select:focus-visible,
input:focus-visible,
.app-shell:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.hidden { display: none !important; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-header {
  background: var(--brand);
  color: white;
  border-bottom: 5px solid #b9954d;
}

.header-inner,
.app-shell,
.site-footer p {
  width: min(960px, calc(100% - 32px));
  margin-inline: auto;
}

.header-inner { padding: 28px 0 30px; }
.site-header h1 { margin: 2px 0 0; font-size: clamp(1.7rem, 4vw, 2.6rem); line-height: 1.15; }
.eyebrow { margin: 0; font-size: .78rem; font-weight: 800; letter-spacing: .11em; text-transform: uppercase; }
.site-header .eyebrow { color: #dce9e5; }

.site-title-link {
  display: block;
  color: inherit;
  text-decoration: none;
}
.site-title-link:hover h1 { text-decoration: underline; }

.app-shell { padding: 36px 0 64px; }

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: clamp(22px, 4vw, 42px);
}

.panel > :first-child { margin-top: 0; }
.panel > :last-child { margin-bottom: 0; }

.exam-summary {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 26px 0;
}

.exam-summary div {
  display: flex;
  min-height: 102px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: 12px;
  text-align: center;
}

.exam-summary strong { color: var(--brand); font-size: 1.6rem; }
.exam-summary span { color: var(--muted); font-size: .9rem; }

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.primary-button,
.secondary-button {
  min-height: 48px;
  border-radius: 10px;
  padding: 11px 18px;
  font-weight: 750;
  cursor: pointer;
}

.primary-button {
  border: 1px solid var(--brand);
  background: var(--brand);
  color: white;
}
.primary-button:hover:not(:disabled) { background: var(--brand-hover); }
.primary-button:disabled { cursor: not-allowed; opacity: .48; }

.secondary-button {
  border: 1px solid var(--border);
  background: white;
  color: var(--brand);
}
.secondary-button:hover { background: var(--surface-alt); }

.status-message { color: var(--muted); }
.status-message.warning { color: var(--warning); font-weight: 700; }

.callout {
  margin: 16px 0 0;
  padding: 14px 16px;
  background: var(--brand-soft);
  border-left: 4px solid var(--brand);
  border-radius: 8px;
}

.exam-toolbar {
  position: sticky;
  top: 0;
  z-index: 10;
  width: 100vw;
  margin-left: calc(50% - 50vw);
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  align-items: center;
  margin-bottom: 18px;
  padding: 12px clamp(16px, 4vw, 40px) 14px;
  background: rgb(246 250 248 / 96%);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
}

.exam-status {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 20px;
}
.question-position {
  color: var(--brand);
  font-weight: 800;
  white-space: nowrap;
}
.progress-track { width: 100%; height: 7px; overflow: hidden; background: var(--brand-soft); border-radius: 999px; }
.progress-bar { width: 1%; height: 100%; background: var(--brand); border-radius: inherit; transition: width .2s ease; }

.timer-box { flex: 0 0 auto; text-align: right; }

.end-test-control {
  margin-right: auto;
  color: var(--muted);
  font-size: .8rem;
  font-weight: 700;
  text-decoration: none;
  opacity: .75;
}
.end-test-control:hover { opacity: 1; color: var(--incorrect); }
.timer-label { display: block; color: var(--muted); font-size: .75rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; }
#timer { display: block; color: var(--brand); font-size: 1.35rem; font-variant-numeric: tabular-nums; font-weight: 850; }
#timer.urgent { color: var(--incorrect); }

.question-stem {
  margin-bottom: 26px;
  font-size: clamp(1.25rem, 2.7vw, 1.65rem);
  line-height: 1.4;
  white-space: pre-line;
}
.question-stem--long { font-size: clamp(1.05rem, 2.2vw, 1.35rem); }
.question-stem--longer { font-size: clamp(0.95rem, 1.9vw, 1.15rem); }

.answer-list { display: grid; gap: 12px; margin: 0; padding: 0; border: 0; }
.answer-option { position: relative; }
.answer-option input { position: absolute; opacity: 0; pointer-events: none; }
.answer-option label {
  display: grid;
  grid-template-columns: 38px 1fr;
  gap: 12px;
  align-items: start;
  min-height: 60px;
  padding: 15px 16px;
  background: white;
  border: 2px solid var(--border);
  border-radius: 12px;
  cursor: pointer;
}
.answer-option label:hover { border-color: #8fa9a1; background: #fbfdfc; }
.answer-option input:checked + label { border-color: var(--brand); background: var(--brand-soft); }
.answer-option input:focus-visible + label { outline: 3px solid var(--focus); outline-offset: 2px; }
.choice-letter {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  background: var(--surface-alt);
  border-radius: 8px;
  color: var(--brand);
  font-weight: 850;
}
.answer-option input:checked + label .choice-letter { background: var(--brand); color: white; }
.choice-text { padding-top: 3px; white-space: pre-line; }

.question-actions { justify-content: flex-end; margin-top: 32px; }
.question-actions .primary-button { min-width: 112px; }
.validation-message { color: var(--incorrect); font-weight: 700; }

.results-summary-panel { margin-bottom: 32px; }
.score-grid { display: grid; grid-template-columns: 1fr 1.5fr; gap: 30px; align-items: center; margin: 24px 0; }
.score-primary { display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 180px; background: var(--surface-alt); border-radius: 14px; }
.score-primary strong { color: var(--brand); font-size: clamp(3rem, 9vw, 5.4rem); line-height: 1; }
.score-primary span { margin-top: 10px; color: var(--muted); font-weight: 700; }
.score-details { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 0; }
.score-details div { padding: 14px; background: #fafcfb; border: 1px solid var(--border); border-radius: 10px; }
.score-details dt { color: var(--muted); font-size: .85rem; }
.score-details dd { margin: 3px 0 0; color: var(--brand); font-size: 1.35rem; font-weight: 850; }

.review-heading-row { display: flex; justify-content: space-between; gap: 20px; align-items: end; margin-bottom: 18px; }
.review-heading-row h2 { margin: 3px 0 0; }
.filter-control { display: grid; gap: 5px; color: var(--muted); font-size: .85rem; font-weight: 700; }
.filter-control select { min-height: 42px; padding: 7px 34px 7px 10px; border: 1px solid var(--border); border-radius: 8px; background: white; color: var(--ink); }
.review-list { display: grid; gap: 18px; }
.review-card { background: white; border: 1px solid var(--border); border-left: 6px solid var(--border); border-radius: 12px; box-shadow: 0 5px 20px rgb(14 47 42 / 7%); padding: 22px; }
.review-card.correct { border-left-color: var(--correct); }
.review-card.incorrect, .review-card.unanswered { border-left-color: var(--incorrect); }
.review-meta { display: flex; justify-content: space-between; gap: 16px; color: var(--muted); font-size: .84rem; font-weight: 750; }
.review-status.correct { color: var(--correct); }
.review-status.incorrect, .review-status.unanswered { color: var(--incorrect); }
.review-stem { margin: 14px 0; font-size: 1.08rem; white-space: pre-line; }
.review-answers { display: grid; gap: 8px; margin: 0 0 18px; padding: 0; list-style: none; }
.review-answer { padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px; white-space: pre-line; }
.review-answer.correct-answer { border-color: #72ad88; background: var(--correct-bg); }
.review-answer.user-wrong { border-color: #d08d88; background: var(--incorrect-bg); }
.answer-marker {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 7px;
  font-size: .86rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: .035em;
}
.answer-marker-icon {
  display: inline-grid;
  flex: 0 0 1.75rem;
  width: 1.75rem;
  height: 1.75rem;
  place-items: center;
  border: 3px solid currentColor;
  border-radius: 50%;
  font-size: 1.28rem;
  font-weight: 1000;
  line-height: 1;
}
.answer-marker-text { line-height: 1.25; }
.answer-marker.correct-marker { color: var(--correct); }
.answer-marker.incorrect-marker { color: var(--incorrect); }
.review-choice-text { display: block; }
.review-notes { padding: 14px 16px; background: var(--surface-alt); border-radius: 9px; }
.review-notes h4 { margin: 0 0 8px; }
.review-notes p { margin: 8px 0; white-space: pre-line; }
.review-notes p:first-of-type { margin-top: 0; }
.review-notes p:last-child { margin-bottom: 0; }

.site-footer { padding: 22px 0 40px; color: var(--muted); font-size: .82rem; text-align: center; }

@media (max-width: 680px) {
  .exam-summary { grid-template-columns: 1fr; }
  .exam-summary div { min-height: 78px; }
  .exam-toolbar { position: static; }
  .exam-status { justify-content: flex-end; gap: 12px; }
  .question-position { font-size: .9rem; }
  #timer { font-size: 1.15rem; }
  .timer-box { text-align: right; }
  .score-grid { grid-template-columns: 1fr; }
  .score-details { grid-template-columns: 1fr 1fr; }
  .review-heading-row { align-items: stretch; flex-direction: column; }
  .button-row button { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}

/* Authentication and account-scoped score history */
.header-layout {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.account-panel {
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 46%;
  font-size: .88rem;
}

/* This page's account panel additionally shows the signed-in email; stack it
   below the button row instead of squeezing it into the same row (admin.html's
   simpler account-panel, with no email span, keeps the plain row layout above). */
#account-panel {
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
}

.account-panel-buttons {
  display: flex;
  align-items: center;
  gap: 12px;
}

#account-email {
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.header-button {
  min-height: 38px;
  flex: 0 0 auto;
  padding: 7px 12px;
  border: 1px solid rgb(255 255 255 / 45%);
  border-radius: 8px;
  background: transparent;
  color: white;
  font-weight: 750;
  cursor: pointer;
}
.header-button:hover { background: rgb(255 255 255 / 10%); }

.auth-panel { max-width: 580px; margin-inline: auto; }
.auth-form { display: grid; gap: 10px; margin-top: 24px; }
.auth-form label { margin-top: 6px; color: var(--brand); font-weight: 800; }
.auth-form input {
  min-height: 48px;
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: white;
  color: var(--ink);
}
.auth-form .primary-button { margin-top: 10px; }

.history-section {
  margin-top: 38px;
  padding-top: 30px;
  border-top: 1px solid var(--border);
}

.section-heading-row {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
}
.section-heading-row h3 { margin: 3px 0 0; font-size: 1.35rem; }

.text-button {
  padding: 5px 2px;
  border: 0;
  background: transparent;
  color: var(--brand);
  font-weight: 800;
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
}
.text-button:disabled { cursor: wait; opacity: .55; }

.table-wrap { width: 100%; overflow-x: auto; margin-top: 14px; }
.history-table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
.history-table th,
.history-table td { padding: 11px 10px; border-bottom: 1px solid var(--border); text-align: left; }
.history-table th { color: var(--muted); font-size: .8rem; text-transform: uppercase; letter-spacing: .045em; }
.history-score { color: var(--brand); font-weight: 850; }

.save-status {
  margin: 16px 0 0;
  padding: 11px 13px;
  border-radius: 8px;
  font-weight: 700;
}
.save-status.pending { background: var(--surface-alt); color: var(--muted); }
.save-status.saved { background: var(--correct-bg); color: var(--correct); }
.save-status.failed { background: var(--incorrect-bg); color: var(--incorrect); }

.secondary-button:disabled,
.header-button:disabled { cursor: not-allowed; opacity: .5; }

@media (max-width: 680px) {
  .header-layout { align-items: flex-start; flex-direction: column; }
  .account-panel { max-width: 100%; width: 100%; align-items: flex-start; }
  .account-panel-buttons { flex-wrap: wrap; }
  .section-heading-row { align-items: flex-start; }
  .history-table th,
  .history-table td { min-width: 105px; }
}

/* Invitation, password-reset, and administrator controls */
.auth-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 14px;
  margin-top: 22px;
}
.auth-back { margin-top: 24px; }
.form-help { margin: 2px 0 0; color: var(--muted); font-size: .86rem; }
.header-button { text-decoration: none; }

.admin-intro {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 24px;
}
.admin-intro h2 { margin: 3px 0 0; }
.admin-section { margin-top: 24px; }
.inline-form {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) auto;
  gap: 12px;
  margin: 20px 0 8px;
}
.inline-form input {
  min-height: 48px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 9px;
}
.danger-button,
.small-danger-button,
.small-button {
  border-radius: 8px;
  font-weight: 800;
  cursor: pointer;
}
.danger-button {
  min-height: 46px;
  padding: 10px 16px;
  border: 1px solid var(--incorrect);
  background: var(--incorrect);
  color: white;
}
.small-danger-button,
.small-button {
  min-height: 34px;
  padding: 6px 9px;
}
.small-danger-button {
  border: 1px solid var(--incorrect);
  background: white;
  color: var(--incorrect);
}
.small-button {
  border: 1px solid var(--border);
  background: white;
  color: var(--brand);
}
.admin-actions { display: flex; flex-wrap: wrap; gap: 7px; min-width: 190px; }
.admin-badge {
  display: inline-block;
  padding: 5px 8px;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand);
  font-size: .78rem;
  font-weight: 850;
}
.warning-text { color: var(--warning); font-weight: 800; }
.admin-table td { vertical-align: top; }
code { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; }

@media (max-width: 680px) {
  .auth-links { flex-direction: column; align-items: flex-start; }
  .admin-intro { align-items: stretch; flex-direction: column; }
  .inline-form { grid-template-columns: 1fr; }
  .admin-actions { min-width: 150px; }
}
.bulk-reset-controls { display: grid; gap: 8px; justify-items: end; }
.bulk-reset-controls label { color: var(--muted); font-size: .84rem; font-weight: 750; }
@media (max-width: 680px) { .bulk-reset-controls { justify-items: stretch; } }

/* Persistent administrator notifications */
.notification-controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}
.notification-count {
  display: inline-block;
  margin-left: 8px;
  padding: 4px 8px;
  border-radius: 999px;
  background: var(--incorrect);
  color: #fff;
  font-size: .75rem;
  font-weight: 850;
  vertical-align: middle;
}
.notification-unread-row td { background: #fff8e8; }
.notification-unread-row td:first-child { box-shadow: inset 4px 0 0 var(--warning); }
.notification-body-text { margin-top: 4px; color: var(--muted); }
@media (max-width: 680px) {
  .notification-controls { justify-content: stretch; }
  .notification-controls button { flex: 1 1 190px; }
}

.test-setting {
  margin: 1.25rem 0;
  max-width: 30rem;
}
.test-setting label { display: block; margin-bottom: .45rem; }
.test-setting select { width: 100%; max-width: 22rem; padding: .7rem .8rem; font: inherit; }

.category-results { margin: 24px 0; }
.category-results h3 { margin-bottom: 10px; }
.category-results-table th[scope="row"] { color: var(--text); font-size: .95rem; text-transform: none; letter-spacing: normal; }
.review-category { color: var(--muted); font-size: .86rem; margin-left: auto; }
.review-meta { gap: 12px; }
@media (max-width: 640px) {
  .review-category { width: 100%; margin-left: 0; }
}