/* ==========================================================================
   MCQ Review Review App
   ========================================================================== */

:root {
  --bg: #f5f5f7;
  --surface: #ffffff;
  --text: #1d1d1f;
  --text-secondary: #6e6e73;
  --rule: #d2d2d7;
  --accent: #0071e3;
  --accent-hover: #0058b0;
  --amber: #bf6a02;
  --success: #0071e3;
  --danger: #d70015;
  --on-accent: #ffffff;
  --scrim: rgba(0, 0, 0, 0.4);
  --footer-bg: #1d1d1f;
  --footer-text: #f5f5f7;

  --font-heading:
    -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;
  --font-body:
    -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;
  --font-mono: var(--font-body);

  --r-xs: 10px;
  --r-sm: 14px;
  --r-md: 22px;
  --r-pill: 980px;

  --shadow-sm:
    0 1px 2px rgba(0, 0, 0, 0.04), 0 2px 10px rgba(0, 0, 0, 0.045);
  --shadow-md:
    0 2px 6px rgba(0, 0, 0, 0.05), 0 10px 30px rgba(0, 0, 0, 0.08);
  --shadow-lg:
    0 8px 20px rgba(0, 0, 0, 0.1), 0 24px 60px rgba(0, 0, 0, 0.16);

  --dur: 200ms;
  --ease: cubic-bezier(0.28, 0.11, 0.32, 1);
}

:root[data-theme="dark"] {
  --bg: #000000;
  --surface: #1c1c1e;
  --text: #f5f5f7;
  --text-secondary: #98989d;
  --rule: #38383a;
  --accent: #2997ff;
  --accent-hover: #6cb4ff;
  --amber: #ff9f0a;
  --success: #2997ff;
  --danger: #ff453a;
  --on-accent: #ffffff;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.5), 0 2px 10px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 2px 6px rgba(0, 0, 0, 0.5), 0 10px 30px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 8px 20px rgba(0, 0, 0, 0.55), 0 24px 60px rgba(0, 0, 0, 0.5);
}

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

* {
  box-sizing: border-box;
}

html,
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  margin: 0;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  display: flex;
  flex-direction: column;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  letter-spacing: -0.015em;
  margin: 0;
}

a {
  color: var(--accent);
}

button {
  font-family: var(--font-body);
}

.hidden {
  display: none !important;
}

/* ---------- Privacy / disclaimer overlay ---------- */

.privacy-overlay {
  position: fixed;
  inset: 0;
  background: var(--scrim);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  z-index: 200;
}

.privacy-modal {
  background: var(--surface);
  border-radius: var(--r-md);
  max-width: 560px;
  width: 100%;
  max-height: calc(100vh - 48px);
  overflow-y: auto;
  padding: 36px;
  box-shadow: var(--shadow-lg);
}

.privacy-icon {
  font-size: 28px;
  line-height: 1;
  color: var(--amber);
  margin-bottom: 14px;
}

.privacy-modal h2 {
  font-size: 23px;
  margin-bottom: 16px;
}

.privacy-modal p {
  font-size: 15px;
  line-height: 1.65;
  color: var(--text-secondary);
  margin: 0 0 16px;
}
.privacy-modal p strong {
  color: var(--text);
}

.privacy-modal .btn-primary {
  margin-top: 8px;
}

/* ---------- Layout shell ---------- */

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 32px;
  background: var(--surface);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06);
}
:root[data-theme="dark"] .app-header {
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.08);
}

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

.brand-logo {
  height: 26px;
  width: auto;
  display: block;
}
.brand-logo-dark {
  display: none;
}
:root[data-theme="dark"] .brand-logo-light {
  display: none;
}
:root[data-theme="dark"] .brand-logo-dark {
  display: block;
}

.brand-title {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.reviewer-chip {
  font-size: 13px;
  color: var(--text-secondary);
}
.reviewer-chip strong {
  color: var(--text);
  font-weight: 600;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: none;
  border-radius: 50%;
  background: var(--bg);
  color: var(--text-secondary);
  font-size: 15px;
  cursor: pointer;
  transition:
    background var(--dur) var(--ease),
    color var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}
.theme-toggle:hover {
  color: var(--accent);
  transform: scale(1.06);
}
.theme-toggle:active {
  transform: scale(0.96);
}
.theme-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.theme-toggle .icon-sun {
  display: none;
}
:root[data-theme="dark"] .theme-toggle .icon-sun {
  display: inline;
}
:root[data-theme="dark"] .theme-toggle .icon-moon {
  display: none;
}

.app-main {
  flex: 1 0 auto;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 32px 80px;
}

.screen {
  display: none;
}
.screen.active {
  display: block;
}

/* ---------- ECG divider ---------- */

.ecg-divider {
  width: 100%;
  height: 22px;
  display: block;
  margin: 24px 0;
}
.ecg-divider path {
  fill: none;
  stroke: var(--rule);
  stroke-width: 1.5;
}

/* ---------- Landing screen ---------- */

.landing-panel {
  max-width: 560px;
  margin: 72px auto;
  text-align: center;
}

.landing-panel h1 {
  font-size: 34px;
  margin-bottom: 12px;
}

.landing-panel p.lede {
  color: var(--text-secondary);
  margin-bottom: 32px;
  line-height: 1.7;
}

.unsupported-notice {
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  padding: 18px 20px;
  border-radius: var(--r-sm);
  text-align: left;
  color: var(--text);
  margin-top: 24px;
}

.field-group {
  text-align: left;
  margin-bottom: 24px;
}

.field-label {
  display: block;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--text);
}

.field-input,
.field-select,
.field-textarea {
  width: 100%;
  border: none;
  border-radius: var(--r-sm);
  background: var(--surface);
  color: var(--text);
  padding: 12px 14px;
  font-family: var(--font-body);
  font-size: 15px;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.1);
  transition: box-shadow var(--dur) var(--ease);
}
:root[data-theme="dark"] .field-input,
:root[data-theme="dark"] .field-select,
:root[data-theme="dark"] .field-textarea {
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.14);
}
.field-input:focus,
.field-select:focus,
.field-textarea:focus {
  outline: none;
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 45%, transparent);
}
.field-hint {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 8px;
}

.btn-primary {
  background: var(--accent);
  color: var(--on-accent);
  border: none;
  border-radius: var(--r-pill);
  padding: 12px 26px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition:
    background var(--dur) var(--ease),
    transform var(--dur) var(--ease);
  min-height: 46px;
}
.btn-primary:hover {
  background: var(--accent-hover);
}
.btn-primary:active {
  transform: scale(0.98);
}
.btn-primary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.btn-primary:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-secondary {
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  color: var(--accent);
  border: none;
  border-radius: var(--r-pill);
  padding: 10px 22px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  min-height: 44px;
  transition: background var(--dur) var(--ease);
}
.btn-secondary:hover {
  background: color-mix(in srgb, var(--accent) 20%, transparent);
}
.btn-secondary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.btn-link {
  background: none;
  border: none;
  color: var(--accent);
  font-size: 14.5px;
  font-weight: 500;
  cursor: pointer;
  padding: 0;
  min-height: 44px;
}
.btn-link:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- Dashboard screen ---------- */

.dashboard-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 8px;
}

.dashboard-header h1 {
  font-size: 24px;
}

.dashboard-totals {
  font-size: 13.5px;
  color: var(--text-secondary);
}

.specialty-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 18px;
  margin-top: 24px;
}

.specialty-card {
  display: block;
  width: 100%;
  text-align: left;
  border: none;
  border-radius: var(--r-md);
  padding: 26px;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition:
    box-shadow var(--dur) var(--ease),
    transform var(--dur) var(--ease);
  font-family: var(--font-body);
}
.specialty-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.specialty-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.specialty-card-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 18px;
}

.specialty-card-title {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 600;
}

.specialty-card-count {
  font-size: 13px;
  color: var(--text-secondary);
}

.stacked-bar {
  display: flex;
  width: 100%;
  height: 7px;
  border-radius: var(--r-pill);
  overflow: hidden;
  background: var(--rule);
  margin-bottom: 14px;
}
.stacked-bar span {
  display: block;
  height: 100%;
  flex: 0 0 auto;
}
.seg-approved {
  background: var(--accent);
}
.seg-needs_edit {
  background: var(--amber);
}
.seg-discard {
  background: var(--danger);
}
.seg-pending {
  background: var(--rule);
}

.status-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

#queueStatusBadges {
  margin-top: 16px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-radius: var(--r-pill);
  background: transparent;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.08);
  color: var(--text-secondary);
  font-size: 12.5px;
  font-weight: 500;
  padding: 5px 12px;
}
:root[data-theme="dark"] .badge {
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.12);
}
.badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  display: inline-block;
}
.badge-pending .dot {
  background: var(--text-secondary);
}
.badge-approved .dot {
  background: var(--accent);
}
.badge-needs_edit .dot {
  background: var(--amber);
}
.badge-discard .dot {
  background: var(--danger);
}

.badge-total {
  background: transparent;
  box-shadow: inset 0 0 0 1px var(--rule);
  color: var(--text);
  font-weight: 600;
}

/* ---------- Queue screen ---------- */

.queue-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}

.queue-back {
  font-size: 13.5px;
}

.queue-progress {
  font-size: 13.5px;
  color: var(--text-secondary);
}

.progress-track {
  width: 100%;
  height: 4px;
  background: var(--rule);
  border-radius: var(--r-pill);
  overflow: hidden;
  margin-bottom: 24px;
}
.progress-fill {
  height: 100%;
  background: var(--accent);
  transition: width var(--dur) var(--ease);
}

.queue-complete-panel {
  text-align: center;
  padding: 64px 24px;
  border-radius: var(--r-md);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

/* Question card */

.question-card {
  border: none;
  border-radius: var(--r-md);
  background: var(--surface);
  padding: 36px;
  box-shadow: var(--shadow-md);
  animation: qcard-enter 0.32s ease-out;
}

@keyframes qcard-enter {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .question-card {
    animation: none;
  }
}

.qcard-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding-bottom: 18px;
  margin-bottom: 22px;
  box-shadow: inset 0 -1px 0 var(--rule);
}

.qcard-meta {
  font-size: 13px;
  color: var(--text-secondary);
}
.qcard-meta strong {
  color: var(--text);
  font-weight: 600;
}

.qcard-header-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.qcard-id {
  font-size: 13px;
  color: var(--text-secondary);
}

.priority-flag {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background: color-mix(in srgb, var(--danger) 8%, var(--surface));
  padding: 14px 18px;
  border-radius: var(--r-sm);
  margin-bottom: 22px;
  font-size: 14px;
}
.priority-flag.tier-2 {
  background: color-mix(in srgb, var(--amber) 10%, var(--surface));
}
.priority-flag ul {
  margin: 4px 0 0;
  padding-left: 18px;
}

.qcard-stem {
  font-size: 18px;
  line-height: 1.65;
  margin-bottom: 26px;
}

.options-list {
  list-style: none;
  padding: 0;
  margin: 0 0 26px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.option-row {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px 16px;
  border: none;
  border-radius: var(--r-sm);
  background: var(--bg);
}
:root[data-theme="dark"] .option-row {
  background: var(--surface);
  box-shadow: inset 0 0 0 1px var(--rule);
}
.option-row.correct {
  background: color-mix(in srgb, var(--accent) 12%, var(--surface));
}
.option-key {
  font-weight: 600;
  color: var(--text-secondary);
  flex-shrink: 0;
  width: 20px;
}
.option-row.correct .option-key {
  color: var(--accent);
}
.option-correct-tag {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--on-accent);
  background: var(--accent);
  border-radius: var(--r-xs);
  padding: 3px 8px;
  margin-left: auto;
  flex-shrink: 0;
  white-space: nowrap;
}

.no-answer-notice {
  font-size: 14px;
  color: var(--danger);
  background: color-mix(in srgb, var(--danger) 8%, var(--surface));
  border-radius: var(--r-sm);
  padding: 12px 16px;
  margin-bottom: 26px;
}

.stat-badges-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-bottom: 12px;
}

.stat-badge {
  border-radius: var(--r-pill);
  padding: 5px 13px;
  font-size: 13px;
  font-weight: 500;
  color: var(--on-accent);
}
.stat-badge .raw {
  opacity: 0.85;
  font-size: 11.5px;
  margin-left: 4px;
}

.band-very-easy,
.band-easy {
  background: var(--accent);
}
.band-moderate {
  background: var(--text-secondary);
}
.band-difficult {
  background: var(--amber);
}
.band-very-difficult {
  background: var(--danger);
}

.band-excellent,
.band-good {
  background: var(--accent);
}
.band-acceptable {
  background: var(--text-secondary);
}
.band-poor {
  background: var(--amber);
}
.band-negative {
  background: var(--danger);
  font-weight: 600;
}

.attempts-note {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.more-stats {
  padding-top: 14px;
  margin-bottom: 8px;
  box-shadow: inset 0 1px 0 var(--rule);
}
.more-stats summary {
  cursor: pointer;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--accent);
  list-style: none;
}
.more-stats summary::-webkit-details-marker {
  display: none;
}
.more-stats summary::before {
  content: "▸ ";
}
.more-stats[open] summary::before {
  content: "▾ ";
}
.more-stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 14px;
  margin-top: 14px;
  font-size: 13px;
  color: var(--text-secondary);
}
.more-stats-grid strong {
  color: var(--text);
  display: block;
  font-size: 15px;
}

/* Reviewer controls */

.review-panel {
  margin-top: 26px;
  padding-top: 26px;
  box-shadow: inset 0 1px 0 var(--rule);
}

.review-panel h4 {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  margin-bottom: 14px;
}

.decision-section {
  margin-top: 22px;
  padding-top: 22px;
  box-shadow: inset 0 1px 0 var(--rule);
}

.current-status-note {
  font-size: 13.5px;
  color: var(--text-secondary);
  margin-bottom: 14px;
}
.current-status-note strong {
  color: var(--text);
}
.current-status-note.is-pending-final strong {
  color: var(--text-secondary);
}

.decision-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.decision-btn {
  border-radius: var(--r-pill);
  padding: 11px 20px;
  font-size: 14.5px;
  font-weight: 500;
  cursor: pointer;
  min-height: 44px;
  border: none;
  background: var(--bg);
  color: var(--text);
  transition:
    background var(--dur) var(--ease),
    color var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}
:root[data-theme="dark"] .decision-btn {
  background: var(--surface);
}
.decision-btn:active {
  transform: scale(0.97);
}
.decision-btn.approve {
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, var(--bg));
}
.decision-btn.approve:hover {
  background: color-mix(in srgb, var(--accent) 20%, var(--bg));
}
.decision-btn.approve.selected {
  background: var(--accent);
  color: var(--on-accent);
}

.decision-btn.needs_edit {
  color: var(--amber);
  background: color-mix(in srgb, var(--amber) 12%, var(--bg));
}
.decision-btn.needs_edit:hover {
  background: color-mix(in srgb, var(--amber) 20%, var(--bg));
}
.decision-btn.needs_edit.selected {
  background: var(--amber);
  color: var(--on-accent);
}

.decision-btn.discard {
  color: var(--danger);
  background: color-mix(in srgb, var(--danger) 12%, var(--bg));
}
.decision-btn.discard:hover {
  background: color-mix(in srgb, var(--danger) 20%, var(--bg));
}
.decision-btn.discard.selected {
  background: var(--danger);
  color: var(--on-accent);
}

.decision-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.required-mark {
  font-weight: 400;
  font-size: 15px;
  color: var(--text-secondary);
}

.domain-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  border-radius: var(--r-sm);
  padding: 14px;
  background: var(--bg);
  transition: box-shadow var(--dur) var(--ease);
}
:root[data-theme="dark"] .domain-chip-row {
  background: var(--surface);
}
.domain-chip-row.error {
  box-shadow: 0 0 0 2px var(--danger);
}

.domain-chip {
  border: none;
  border-radius: var(--r-pill);
  background: var(--surface);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  padding: 7px 15px;
  cursor: pointer;
  min-height: 32px;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.06);
  transition:
    background var(--dur) var(--ease),
    color var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}
:root[data-theme="dark"] .domain-chip {
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.1);
}
.domain-chip:hover {
  color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}
.domain-chip:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.domain-chip.selected {
  background: var(--accent);
  color: var(--on-accent);
  box-shadow: none;
}

.field-textarea {
  resize: vertical;
  min-height: 70px;
  font-family: var(--font-body);
}

.queue-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 26px;
  gap: 12px;
  flex-wrap: wrap;
}
.queue-nav-group {
  display: flex;
  gap: 10px;
}

/* ---------- Toast ---------- */

.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--text);
  color: var(--bg);
  padding: 13px 22px;
  border-radius: var(--r-pill);
  font-size: 13.5px;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transform: translateY(8px);
  transition:
    opacity var(--dur) var(--ease),
    transform var(--dur) var(--ease);
  pointer-events: none;
  z-index: 100;
}
.toast.show {
  opacity: 1;
  transform: translateY(0);
}
.toast.error {
  background: var(--danger);
  color: var(--on-accent);
}

/* ---------- Footer ---------- */
/* A fixed dark band with light text, deliberately the same in both site
   themes (like --scrim) — a small colophon strip, not a themed surface. */

.site-footer {
  background: var(--footer-bg);
  padding: 16px 32px;
  text-align: center;
}

.footer-meta {
  font-size: 12.5px;
  color: var(--footer-text);
  opacity: 0.7;
}

@media (max-width: 480px) {
  .app-header {
    padding: 14px 16px;
  }
  .app-main {
    padding: 24px 16px 64px;
  }
  .question-card {
    padding: 22px;
  }
}