/* ============================================================
   Examplar exam experience v2 - "Control Room"
   Single stylesheet for exam.html. Replaces the legacy stack
   (style-new + multi-exam-styles + modern-enhancements +
   exam-enhancements) on the exam page only.
   Design tokens first; every selector consumed or generated by
   script-multi-exam.js is covered below.
   ============================================================ */

/* ===== Tokens ===== */
:root {
  /* rail (always dark) */
  --rail-bg: #1d232f;
  --rail-bg-soft: #252c3a;
  --rail-text: #aab2c0;
  --rail-text-strong: #e8ebf0;
  --rail-line: #313947;
  --accent-bright: #2dd4bf;

  /* main pane */
  --bg: #f1f3f5;
  --surface: #ffffff;
  --surface-soft: #f7f8fa;
  --text: #1f2733;
  --text-soft: #5b6573;
  --text-faint: #8d95a3;
  --line: #e3e6ea;
  --line-strong: #cfd4db;

  --accent: #0f766e;
  --accent-deep: #0b5d57;
  --accent-tint: #ecf6f4;
  --accent-chip-border: #cde7e2;

  --good: #1f7a4d;
  --good-tint: #ecf6f0;
  --good-line: #cfe5db;
  --bad: #b03a3a;
  --bad-tint: #faeeee;
  --bad-line: #ecd2d2;
  --flag: #b07d2b;
  --flag-tint: #fdf6e7;
  --flag-line: #ecdcb8;
  --info: #2563eb;
  --info-tint: #eef3fd;
  --info-line: #d4e0f7;

  --btn-primary-text: #ffffff;
  --card-shadow: 0 1px 2px rgba(31, 39, 51, 0.04);
  --overlay: rgba(15, 23, 42, 0.55);

  --radius: 8px;
  --radius-lg: 12px;

  --font-ui: 'Segoe UI Variable Text', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-num: 'Cascadia Mono', Consolas, ui-monospace, monospace;
}

[data-theme="dark"], body.dark-mode {
  --rail-bg: #161b24;
  --rail-bg-soft: #1f2530;
  --rail-line: #2b3340;

  --bg: #10141b;
  --surface: #1a212c;
  --surface-soft: #1f2733;
  --text: #e2e7ee;
  --text-soft: #a8b1bf;
  --text-faint: #79828f;
  --line: #28303d;
  --line-strong: #39434f;

  --accent: #2bb3a3;
  --accent-deep: #4ecdbd;
  --accent-tint: #182d2b;
  --accent-chip-border: #28534d;

  --good: #5fc28e;
  --good-tint: #1a2c23;
  --good-line: #2b4a3a;
  --bad: #dd8f8f;
  --bad-tint: #2f2022;
  --bad-line: #4d3032;
  --flag: #d3aa64;
  --flag-tint: #2e271a;
  --flag-line: #4a3e26;
  --info: #7ba6f0;
  --info-tint: #1b2434;
  --info-line: #2c3c58;

  --btn-primary-text: #0d1a18;
  --card-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
  --overlay: rgba(0, 0, 0, 0.6);
}

/* ===== Reset & base ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: var(--font-ui);
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.5;
  min-height: 100vh;
}

.screen { display: none; }
.screen.active { display: block; }
.is-hidden { display: none !important; }
[hidden] { display: none !important; }

button { font-family: inherit; }

/* ===== Skip link (hidden until keyboard focus) ===== */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 20000;
  padding: 8px 14px;
  background: var(--text);
  color: var(--bg);
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  transform: translateY(-300%);
}
.skip-link:focus-visible {
  transform: translateY(0);
  outline: 2px solid var(--accent-bright);
  outline-offset: 2px;
}

/* ===== Generic buttons (flat, sentence case) ===== */
.btn {
  font: inherit;
  font-weight: 600;
  font-size: 0.875rem;
  border-radius: var(--radius);
  padding: 0.55rem 1.2rem;
  cursor: pointer;
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
  text-decoration: none;
}
.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.btn-primary { background: var(--accent); color: var(--btn-primary-text); }
.btn-primary:hover { background: var(--accent-deep); }
.btn-secondary,
.btn-outline {
  background: var(--surface);
  border-color: var(--line-strong);
  color: var(--text-soft);
}
.btn-secondary:hover,
.btn-outline:hover { border-color: var(--text-faint); color: var(--text); }
.btn-info {
  background: none;
  border: none;
  color: var(--accent);
}
.btn-info:hover { text-decoration: underline; }
.btn-warning { background: var(--accent); color: var(--btn-primary-text); }
.btn-warning:hover { background: var(--accent-deep); }
.btn:disabled {
  opacity: 0.4;
  cursor: default;
}
.btn:disabled:hover { border-color: var(--line-strong); color: var(--text-soft); }

/* ===== Layout: rail + workspace ===== */
.cr-layout {
  display: grid;
  grid-template-columns: 248px minmax(0, 1fr);
  min-height: 100vh;
}

.cr-rail {
  background: var(--rail-bg);
  color: var(--rail-text);
  padding: 1.25rem 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.cr-brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}
.cr-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--rail-text-strong);
  font-weight: 700;
  font-size: 0.9375rem;
  text-decoration: none;
}
.cr-brand-mark {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background: linear-gradient(150deg, var(--accent-bright), #0f766e);
  display: grid;
  place-items: center;
  color: #08312d;
  font-size: 0.75rem;
  font-weight: 800;
}

/* theme toggle lives in the rail; JS binds .theme-toggle */
.theme-controls { display: contents; }
.theme-toggle {
  border: 1px solid var(--rail-line);
  background: transparent;
  color: var(--rail-text);
  width: 30px;
  height: 30px;
  border-radius: var(--radius);
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: color 0.15s, border-color 0.15s;
}
.theme-toggle:hover { color: var(--accent-bright); border-color: var(--accent-bright); }
.theme-toggle:focus-visible { outline: 2px solid var(--accent-bright); outline-offset: 2px; }

/* Pack identity card */
.cr-pack {
  border: 1px solid var(--rail-line);
  background: var(--rail-bg-soft);
  border-radius: 10px;
  padding: 0.7rem 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.exam-badge {
  font-size: 0.8438rem;
  color: var(--rail-text-strong);
  font-weight: 600;
  line-height: 1.35;
}
.exam-badge.study-badge::after {
  content: "Study mode";
  display: inline-block;
  margin-left: 0.45rem;
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-bright);
  border: 1px solid var(--accent-bright);
  border-radius: 5px;
  padding: 0.05rem 0.35rem;
  vertical-align: middle;
}

/* Timer block */
.exam-timer {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}
.exam-timer .cr-timer-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  opacity: 0.7;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
#timer {
  font-family: var(--font-num);
  font-size: 1.6rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--rail-text-strong);
  font-variant-numeric: tabular-nums;
}
#timer.timer-warning, .exam-timer .timer-warning { color: #e7c068; }
#timer.timer-danger, .exam-timer .timer-danger { color: #e88f8f; font-weight: 700; }

/* Question palette (JS: #question-navigator / #nav-grid) */
.question-navigator { display: flex; flex-direction: column; gap: 0.6rem; }
.cr-palette-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  opacity: 0.7;
}
.nav-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.4rem;
}
.nav-grid button {
  aspect-ratio: 1;
  min-height: 38px;
  border-radius: 7px;
  border: 1px solid var(--rail-line);
  background: transparent;
  color: var(--rail-text);
  font-family: var(--font-num);
  font-size: 0.72rem;
  cursor: pointer;
  display: grid;
  place-items: center;
  position: relative;
  transition: border-color 0.15s, background 0.15s;
}
.nav-grid button:hover { border-color: var(--accent-bright); }
.nav-grid button:focus-visible {
  outline: 2px solid var(--accent-bright);
  outline-offset: 1px;
}
.nav-grid button.nav-answered {
  background: #0f766e;
  border-color: #0f766e;
  color: #ffffff;
  font-weight: 600;
}
.nav-grid button.nav-current {
  border: 2px solid var(--accent-bright);
  color: var(--rail-text-strong);
  font-weight: 700;
}
.nav-grid button.nav-marked::after {
  content: "";
  position: absolute;
  top: 3px;
  right: 3px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #e7c068;
}
.nav-legend {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-size: 0.72rem;
  opacity: 0.8;
}
.nav-legend-item { display: inline-flex; align-items: center; gap: 0.5rem; }
.nav-dot {
  width: 10px;
  height: 10px;
  border-radius: 3px;
  border: 1px solid var(--rail-line);
  display: inline-block;
}
.nav-dot.answered { background: #0f766e; border-color: #0f766e; }
.nav-dot.current { border: 2px solid var(--accent-bright); background: transparent; }
.nav-dot.marked { background: #e7c068; border-color: #e7c068; border-radius: 50%; }
.nav-dot.unanswered { background: transparent; }

/* Palette toggle: only relevant on small screens */
.toggle-navigator {
  display: none;
  border: 1px solid var(--rail-line);
  background: transparent;
  color: var(--rail-text);
  border-radius: var(--radius);
  padding: 6px 10px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: color 0.15s, border-color 0.15s;
}
.toggle-navigator:hover { color: var(--accent-bright); border-color: var(--accent-bright); }
.toggle-navigator:focus-visible {
  outline: 2px solid var(--accent-bright);
  outline-offset: 2px;
}

/* Rail footer actions */
.exam-bottom-actions {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
#finish-exam {
  width: 100%;
  justify-content: center;
  font-weight: 600;
  font-size: 0.875rem;
  background: var(--accent);
  color: var(--btn-primary-text);
  border: none;
  border-radius: var(--radius);
  padding: 0.65rem 1rem;
  cursor: pointer;
  transition: background 0.15s;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}
#finish-exam:hover { background: var(--accent-deep); }
#finish-exam:focus-visible { outline: 2px solid var(--accent-bright); outline-offset: 2px; }
.btn-review-marked {
  width: 100%;
  justify-content: center;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--rail-text);
  background: none;
  border: 1px solid var(--rail-line);
  border-radius: var(--radius);
  padding: 0.55rem 1rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  transition: color 0.15s, border-color 0.15s;
}
.btn-review-marked:hover { color: #e7c068; border-color: #e7c068; }
.btn-review-marked:focus-visible { outline: 2px solid var(--accent-bright); outline-offset: 2px; }
#switch-exam {
  width: 100%;
  justify-content: center;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--rail-text);
  background: none;
  border: 1px solid var(--rail-line);
  border-radius: var(--radius);
  padding: 0.55rem 1rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  transition: color 0.15s, border-color 0.15s;
}
#switch-exam:hover { color: var(--rail-text-strong); border-color: var(--rail-text); }
#switch-exam:focus-visible { outline: 2px solid var(--accent-bright); outline-offset: 2px; }

/* ===== Workspace ===== */
.cr-main {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
.cr-workspace {
  flex: 1;
  padding: 1.6rem 2.5rem 1.5rem;
  max-width: 920px;
  width: 100%;
}

/* progress hairline */
.exam-progress { margin-bottom: 1.1rem; }
.progress-bar {
  height: 3px;
  background: var(--line);
  border-radius: 999px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  width: 0;
  background: var(--accent);
  border-radius: 999px;
  transition: width 0.45s cubic-bezier(0.22, 1, 0.36, 1);
}

/* question header row */
.cr-qhead {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.2rem;
  flex-wrap: wrap;
}
.question-number {
  font-size: 1.05rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.375rem;
}
.question-type-indicator {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  background: var(--accent-tint);
  color: var(--accent-deep);
  border: 1px solid var(--accent-chip-border);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}
/* type variants share the same calm chip; keep hooks for future tinting */
.question-type-indicator.sequence,
.question-type-indicator.yes_no_matrix,
.question-type-indicator.drag_drop,
.question-type-indicator.drag_drop_select,
.question-type-indicator.hotspot {
  background: var(--accent-tint);
  color: var(--accent-deep);
  border-color: var(--accent-chip-border);
}
#question-counter {
  font-family: var(--font-num);
  font-size: 0.78rem;
  color: var(--text-faint);
}
#mark-review-btn {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-faint);
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 0.4rem 0.8rem;
  cursor: pointer;
  min-height: 38px;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}
#mark-review-btn:hover { border-color: var(--flag); color: var(--flag); }
#mark-review-btn.marked {
  background: var(--flag-tint);
  border-color: var(--flag);
  color: var(--flag);
}
#mark-review-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* question card */
.question-container {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 1.6rem 1.9rem;
  box-shadow: var(--card-shadow);
}
.question-text {
  font-size: 1.0625rem;
  line-height: 1.6;
  margin-bottom: 1.4rem;
  text-wrap: pretty;
  color: var(--text);
}

/* ===== Options ===== */
.options-container {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}
.option { position: relative; }
.option input[type="radio"],
.option input[type="checkbox"] {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}
.option label {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.8rem 1rem;
  min-height: 44px;
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  background: var(--surface);
  cursor: pointer;
  font-size: 0.9375rem;
  line-height: 1.5;
  color: var(--text);
  transition: border-color 0.12s, background 0.12s;
}
.option label:hover { border-color: var(--accent); }
.option input[type="radio"]:focus-visible + label,
.option input[type="checkbox"]:focus-visible + label {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.option label::before {
  content: "";
  width: 18px;
  height: 18px;
  min-width: 18px;
  margin-top: 2px;
  border: 2px solid var(--line-strong);
  border-radius: 50%;
  background: transparent;
  transition: border-color 0.12s, background 0.12s, box-shadow 0.12s;
}
.option input[type="checkbox"] + label::before { border-radius: 5px; }
.option-letter {
  font-family: var(--font-num);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-faint);
  min-width: 1.1rem;
  transition: color 0.12s;
}
.option-text { flex: 1; color: inherit; }

/* selected */
.option input:checked + label,
.option.selected label,
.option.user-selected label {
  border-color: var(--accent);
  background: var(--accent-tint);
}
.option input:checked + label::before,
.option.selected label::before,
.option.user-selected label::before {
  border-color: var(--accent);
  box-shadow: inset 0 0 0 3.5px var(--surface);
  background: var(--accent);
}
.option input:checked + label .option-letter,
.option.selected label .option-letter { color: var(--accent-deep); }

/* review states after Show answer / feedback */
.option.correct label {
  border-color: var(--good);
  background: var(--good-tint);
}
.option.correct label::before {
  border-color: var(--good);
  box-shadow: inset 0 0 0 3.5px var(--surface);
  background: var(--good);
}
.option.correct label .option-letter { color: var(--good); }
.option.incorrect label {
  border-color: var(--bad);
  background: var(--bad-tint);
}
.option.incorrect label::before {
  border-color: var(--bad);
  box-shadow: inset 0 0 0 3.5px var(--surface);
  background: var(--bad);
}
.option.incorrect label .option-letter { color: var(--bad); }

.multi-select-hint {
  font-size: 0.78rem;
  color: var(--text-faint);
  margin-bottom: 0.6rem;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

/* ===== Yes/No matrix ===== */
.yn-matrix { display: flex; flex-direction: column; gap: 0.55rem; }
.yn-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.8rem 1rem;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  transition: border-color 0.12s;
}
.yn-row:hover { border-color: var(--accent); }
.yn-label { flex: 1; font-size: 0.9375rem; line-height: 1.5; color: var(--text); }
.yn-controls { display: flex; gap: 0.4rem; }
.yn-btn {
  padding: 0.45rem 1.1rem;
  min-width: 64px;
  min-height: 38px;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-size: 0.8438rem;
  font-weight: 600;
  color: var(--text-soft);
  cursor: pointer;
  transition: border-color 0.12s, background 0.12s, color 0.12s;
}
.yn-btn:hover { border-color: var(--accent); color: var(--accent); }
.yn-btn:focus-visible,
.seq-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.yn-btn.selected {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--btn-primary-text);
}
.yn-solution { margin-top: 6px; }
.yn-solution-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 0;
  border-bottom: 1px dashed var(--line);
}
.yn-solution-row:last-child { border-bottom: none; }
.yn-solution-label { flex: 1; padding-right: 8px; }
.yn-solution-value { font-weight: 600; }

/* ===== Sequence / ordering ===== */
.sequence-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 10px;
}
.sequence-title { font-weight: 600; margin-bottom: 8px; }
.sequence-selected,
.sequence-options {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px;
  min-height: 120px;
  background: var(--surface-soft);
}
.sequence-single-list { display: flex; flex-direction: column; gap: 0.55rem; }
.sequence-item {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.7rem 0.9rem;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  cursor: move;
  transition: border-color 0.12s, opacity 0.12s;
}
.sequence-item:hover { border-color: var(--accent); }
.sequence-item.dragging { opacity: 0.5; }
.sequence-item.keyboard-focused {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.sequence-drag-handle { color: var(--text-faint); cursor: grab; font-size: 1rem; }
.sequence-pos {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  min-width: 28px;
  background: var(--accent-tint);
  color: var(--accent-deep);
  border: 1px solid var(--accent-chip-border);
  border-radius: 50%;
  font-family: var(--font-num);
  font-weight: 600;
  font-size: 0.8125rem;
}
.sequence-text { flex: 1; font-size: 0.9375rem; color: var(--text); }
.sequence-actions { display: flex; gap: 0.4rem; }
.seq-btn {
  width: 34px;
  height: 34px;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  color: var(--text-soft);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.12s, color 0.12s;
}
.seq-btn:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
.seq-btn:disabled { opacity: 0.3; cursor: not-allowed; }
.sequence-option-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  text-align: left;
  border: 1px solid var(--line-strong);
  background: var(--surface);
  color: inherit;
  padding: 8px 10px;
  min-height: 44px;
  border-radius: 6px;
  cursor: pointer;
  margin-bottom: 8px;
  transition: border-color 0.12s;
}
.sequence-option-btn:hover:not(:disabled) { border-color: var(--accent); }
.sequence-option-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.sequence-option-btn:disabled { opacity: 0.6; cursor: not-allowed; }

/* ===== Drag-drop select ===== */
.ddselect-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 10px;
}
.ddselect-source,
.ddselect-target {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px;
  min-height: 120px;
  background: var(--surface-soft);
}
.ddselect-title { font-weight: 600; margin-bottom: 8px; }
.ddselect-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  text-align: left;
  border: 1px solid var(--line-strong);
  background: var(--surface);
  color: inherit;
  padding: 8px 10px;
  border-radius: 6px;
  cursor: pointer;
  margin-bottom: 8px;
  min-height: 44px;
  transition: border-color 0.12s;
}
.ddselect-btn:hover:not(:disabled) { border-color: var(--accent); }
.ddselect-btn:focus-visible,
.chip-remove:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.ddselect-chip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  padding: 8px 10px;
  margin-bottom: 8px;
}
.chip-index {
  font-family: var(--font-num);
  font-weight: 600;
  color: var(--accent-deep);
  width: 24px;
}
.chip-text { flex: 1; }
.chip-remove {
  border: 1px solid var(--line-strong);
  background: var(--surface-soft);
  color: var(--text-soft);
  padding: 4px 6px;
  border-radius: 4px;
  cursor: pointer;
  margin-left: 6px;
  min-width: 36px;
  min-height: 36px;
  transition: border-color 0.12s, color 0.12s;
}
.chip-remove:hover { border-color: var(--bad); color: var(--bad); }

/* ===== Images ===== */
.question-images-container,
.explanation-images-container { margin: 15px 0; }
.question-image-wrapper,
.explanation-image-wrapper { position: relative; margin: 10px 0; }
.question-image,
.explanation-image {
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  display: block;
  margin: 0 auto;
  background: var(--surface);
}
.image-placeholder,
.loading-spinner {
  background: var(--surface-soft);
  color: var(--text-faint);
  padding: 20px;
  text-align: center;
  border-radius: var(--radius);
  border: 1px dashed var(--line-strong);
}
.loading-spinner i { animation: cr-spin 1s linear infinite; }
@keyframes cr-spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
.image-error {
  background: var(--bad-tint);
  color: var(--bad);
  padding: 20px;
  text-align: center;
  border-radius: var(--radius);
  border: 1px solid var(--bad-line);
}
.image-warning-banner {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--flag);
  color: #fff;
  padding: 10px 20px;
  text-align: center;
  z-index: 10000;
  font-weight: 600;
  font-size: 0.875rem;
}

/* ===== Answer feedback panel ===== */
#answer-feedback {
  margin-top: 1.3rem;
  border: 1px solid var(--good-line);
  background: var(--good-tint);
  border-radius: 10px;
  padding: 1rem 1.2rem;
  animation: cr-rise 0.22s ease;
}
#answer-feedback.incorrect {
  border-color: var(--bad-line);
  background: var(--bad-tint);
}
@keyframes cr-rise {
  from { opacity: 0; transform: translateY(5px); }
  to { opacity: 1; transform: none; }
}
.feedback-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}
.feedback-status {
  font-size: 0.875rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--text-soft);
}
.feedback-status.correct { color: var(--good); }
.feedback-status.incorrect { color: var(--bad); }
#close-feedback {
  background: none;
  border: none;
  width: 36px;
  height: 36px;
  border-radius: var(--radius);
  cursor: pointer;
  color: var(--text-faint);
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.15s, background 0.15s;
}
#close-feedback:hover { color: var(--bad); background: var(--surface); }
#close-feedback:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.feedback-content { display: flex; flex-direction: column; gap: 0.45rem; }
.correct-answer,
.explanation {
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--text-soft);
}
.correct-answer strong,
.explanation strong { color: var(--text); font-weight: 700; }
.explanation-source {
  margin-top: 4px;
  font-size: 0.8rem;
  color: var(--text-faint);
}
.explanation-source a { color: var(--accent); }
.explanation-source i { margin-right: 4px; }

/* ===== Bottom bar ===== */
.navigation-buttons {
  position: sticky;
  bottom: 0;
  background: color-mix(in srgb, var(--surface) 94%, transparent);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-top: 1px solid var(--line);
  padding: 0.8rem 2.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  max-width: 920px;
  width: 100%;
}
.navigation-buttons .cr-spacer { flex: 1; }
#prev-btn:disabled {
  opacity: 0.4;
  cursor: default;
  transform: none;
  box-shadow: none;
}

/* ===== Question controls (legacy wrapper kept for JS-injected content) ===== */
.question-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* ===== Finish exam confirmation modal ===== */
.exam-confirm-overlay {
  position: fixed;
  inset: 0;
  z-index: 12000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: var(--overlay);
  animation: cr-fade 0.18s ease-out;
}
@keyframes cr-fade { from { opacity: 0; } to { opacity: 1; } }
.exam-confirm-dialog {
  width: min(460px, 100%);
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--line);
  box-shadow: 0 24px 70px rgba(15, 23, 42, 0.28);
  text-align: center;
  animation: cr-rise 0.22s ease;
}
.exam-confirm-icon {
  width: 58px;
  height: 58px;
  margin: 0 auto 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  font-size: 1.6rem;
}
.exam-confirm-icon.warning { background: var(--flag-tint); color: var(--flag); }
.exam-confirm-icon.ready { background: var(--good-tint); color: var(--good); }
.exam-confirm-dialog h2 {
  margin: 0 0 0.55rem;
  font-size: 1.28rem;
  line-height: 1.2;
  color: var(--text);
}
.exam-confirm-dialog p {
  margin: 0;
  color: var(--text-soft);
  font-size: 0.95rem;
  line-height: 1.5;
}
.exam-confirm-summary {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  margin: 1.2rem 0;
}
.exam-confirm-metric {
  padding: 0.8rem;
  border-radius: var(--radius-lg);
  background: var(--accent-tint);
  border: 1px solid var(--accent-chip-border);
}
.exam-confirm-metric.is-warning {
  background: var(--flag-tint);
  border-color: var(--flag-line);
}
.exam-confirm-metric span {
  display: block;
  margin-bottom: 0.25rem;
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-soft);
}
.exam-confirm-metric strong {
  display: block;
  font-size: 1.2rem;
  color: var(--text);
}
.exam-confirm-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
}
.exam-confirm-btn {
  min-height: 44px;
  padding: 0.68rem 1rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  font-weight: 700;
  font-size: 0.84rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.exam-confirm-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.exam-confirm-btn.secondary {
  color: var(--text-soft);
  background: var(--surface);
  border-color: var(--line-strong);
}
.exam-confirm-btn.secondary:hover { color: var(--text); border-color: var(--text-faint); }
.exam-confirm-btn.primary {
  color: var(--btn-primary-text);
  background: var(--accent);
}
.exam-confirm-btn.primary:hover { background: var(--accent-deep); }

/* ===== Progress / attempts modal ===== */
.progress-modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--overlay);
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: auto;
  padding: 20px;
}
.progress-modal-content {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 32px;
  max-width: 600px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  position: relative;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}
.progress-modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: inherit;
  opacity: 0.6;
}
.progress-modal-close:hover { opacity: 1; }
.progress-modal-close:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.progress-modal-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 20px;
}
.attempts-list { display: flex; flex-direction: column; gap: 0.5rem; }
.attempt-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0.65rem;
  background: var(--surface-soft);
  border-radius: var(--radius);
  border-left: 3px solid var(--text-faint);
  font-size: 0.8rem;
}
.attempt-item.passed { border-left-color: var(--good); }
.attempt-item.failed { border-left-color: var(--bad); }
.attempt-date { color: var(--text-faint); }
.attempt-score { font-weight: 600; }
.attempt-status { display: flex; align-items: center; gap: 0.25rem; font-weight: 500; }
.progress-attempt-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
}
.progress-attempt-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 8px 12px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-weight: 600;
  cursor: pointer;
  color: var(--btn-primary-text);
}
.progress-attempt-btn.primary { background: var(--accent); }
.progress-attempt-btn.primary:hover { background: var(--accent-deep); }
.progress-attempt-btn.secondary {
  background: var(--surface);
  border-color: var(--line-strong);
  color: var(--text-soft);
}
.progress-attempt-btn.secondary:hover { border-color: var(--text-faint); color: var(--text); }
.progress-attempt-btn:disabled {
  background: var(--surface-soft);
  color: var(--text-faint);
  cursor: not-allowed;
  opacity: 0.7;
}

/* custom alert (utils.js showCustomAlert) */
.custom-alert-content {
  max-width: 400px;
  text-align: center;
  padding: 30px;
}
.custom-alert-icon { font-size: 2.6rem; margin-bottom: 16px; }
.custom-alert-icon.info { color: var(--accent); }
.custom-alert-icon.success { color: var(--good); }
.custom-alert-icon.warning { color: var(--flag); }
.custom-alert-icon.error { color: var(--bad); }
.custom-alert-title { margin: 0 0 8px; font-size: 1.15rem; font-weight: 700; color: var(--text); }
.custom-alert-desc { margin: 0 0 20px; font-size: 0.9rem; line-height: 1.5; color: var(--text-soft); }
.custom-alert-btn {
  font: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.55rem 1.5rem;
  background: var(--accent);
  color: var(--btn-primary-text);
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.15s;
}
.custom-alert-btn:hover { background: var(--accent-deep); }
.custom-alert-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ===== Results screen ===== */
#results-screen {
  max-width: 920px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}
.results-container { background: transparent; }
.cr-report-head {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid var(--line);
}
.cr-report-head .cr-brand { color: var(--text); }
.cr-report-head .cr-report-title {
  margin-left: auto;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.results-shell {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}
.results-layout {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 0.85rem;
}
.results-summary-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 1rem 1.1rem;
  box-shadow: var(--card-shadow);
}
.results-summary-card.passed { border-color: var(--good-line); }
.results-summary-card.failed { border-color: var(--bad-line); }
.results-summary-card.studied { border-color: var(--accent-chip-border); }
.summary-top-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.7rem;
}
.result-status-chip {
  padding: 3px 9px;
  font-size: 0.7rem;
  border-radius: 999px;
  font-weight: 700;
  letter-spacing: 0.05em;
  border: 1px solid var(--line-strong);
  color: var(--text-soft);
}
.result-status-chip.passed {
  background: var(--good-tint);
  border-color: var(--good-line);
  color: var(--good);
}
.result-status-chip.failed {
  background: var(--bad-tint);
  border-color: var(--bad-line);
  color: var(--bad);
}
.result-status-chip.studied,
.status-icon.studied {
  background: var(--accent-tint);
  border-color: var(--accent-chip-border);
  color: var(--accent-deep);
}
.exam-name-pill {
  padding: 3px 9px;
  border-radius: 999px;
  background: var(--accent-tint);
  border: 1px solid var(--accent-chip-border);
  color: var(--accent-deep);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.summary-visuals {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 0.4rem 0 0.2rem;
}
.score-ring {
  display: flex;
  align-items: center;
  background: transparent;
  border: none;
  padding: 0;
}
.score-ring-inner {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  align-items: flex-start;
}
.score-percentage {
  font-family: var(--font-num);
  font-size: 3rem;
  font-weight: 700;
  color: var(--text);
  line-height: 0.95;
  font-variant-numeric: tabular-nums;
}
.results-summary-card.passed .score-percentage { color: var(--good); }
.results-summary-card.failed .score-percentage { color: var(--bad); }
.score-label {
  font-size: 0.62rem;
  font-weight: 600;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.status-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  animation: none;
  margin-left: auto;
}
.status-icon.passed {
  background: var(--good-tint);
  border-color: var(--good-line);
  color: var(--good);
}
.status-icon.failed {
  background: var(--bad-tint);
  border-color: var(--bad-line);
  color: var(--bad);
}
.status-icon i { font-size: 1.05rem; color: currentColor; }
.summary-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: 0.8rem 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.summary-metric {
  background: var(--surface-soft);
  padding: 0.5rem 0.3rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.summary-metric + .summary-metric { border-left: 1px solid var(--line); }
.summary-metric .metric-label {
  font-size: 0.6rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-faint);
  margin-bottom: 1px;
}
.summary-metric .metric-value {
  font-family: var(--font-num);
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}
.summary-metric:nth-child(1) .metric-value { color: var(--good); }
.summary-metric:nth-child(2) .metric-value { color: var(--bad); }
.summary-metric:nth-child(3) .metric-value { color: var(--text); }
.summary-divider { height: 1px; background: var(--line); margin: 0.5rem 0; }
.summary-meta {
  font-size: 0.72rem;
  color: var(--text-faint);
  display: flex;
  gap: 1.5rem;
}
.summary-meta strong {
  font-family: var(--font-num);
  font-size: 0.9rem;
  color: var(--text);
  display: block;
}
.summary-meta .meta-label { display: block; }

.results-insights-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 1rem 1.1rem;
  box-shadow: var(--card-shadow);
}
.insights-header h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.insights-header h3 i { color: var(--accent); }
.insights-header p {
  font-size: 0.74rem;
  color: var(--text-faint);
  margin-top: 1px;
}
.insight-progress {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 0.6rem;
}
.insight-label-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-soft);
}
.insight-bar {
  height: 6px;
  background: var(--line);
  border-radius: 999px;
  overflow: hidden;
}
.insight-bar .stat-progress {
  height: 100%;
  border-radius: 999px;
  transition: width 0.4s ease;
}
.insight-correct { background: var(--good); }
.insight-incorrect { background: var(--bad); }
.insights-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 0.6rem;
}
.insights-list li {
  display: flex;
  justify-content: space-between;
  padding: 0.4rem 0.65rem;
  border-radius: var(--radius);
  background: var(--surface-soft);
  border-left: 3px solid var(--line-strong);
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--text);
}
.insight-hint {
  padding: 0.45rem 0.65rem;
  border-radius: var(--radius);
  background: var(--info-tint);
  border: 1px solid var(--info-line);
  color: var(--info);
  font-size: 0.74rem;
  line-height: 1.4;
  font-weight: 500;
  margin-top: 0.6rem;
  display: flex;
  align-items: flex-start;
  gap: 0.4rem;
}

/* detailed review */
.detailed-review { margin: 0.5rem 0; }
.section-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.section-title i { color: var(--accent); }
.review-list { display: grid; gap: 0.5rem; }
.review-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 0.75rem 0.9rem;
}
.review-item.correct { border-left-color: var(--good); }
.review-item.incorrect { border-left-color: var(--bad); }
.review-item.skipped { border-left-color: var(--flag); }
.review-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.35rem;
}
.review-number {
  font-family: var(--font-num);
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--accent-deep);
  background: var(--accent-tint);
  padding: 2px 6px;
  border-radius: 6px;
  border: 1px solid var(--accent-chip-border);
}
.review-status {
  font-size: 0.65rem;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  border: 1px solid transparent;
}
.review-status.correct { background: var(--good-tint); color: var(--good); border-color: var(--good-line); }
.review-status.incorrect { background: var(--bad-tint); color: var(--bad); border-color: var(--bad-line); }
.review-status.skipped { background: var(--flag-tint); color: var(--flag); border-color: var(--flag-line); }
.review-question {
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--text);
  margin: 0.4rem 0 0.5rem;
  font-weight: 500;
}
.review-answers { display: flex; flex-direction: column; gap: 0.2rem; }
.review-answer-row {
  display: flex;
  gap: 0.4rem;
  align-items: center;
  margin-bottom: 0.2rem;
}
.review-label {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-faint);
  min-width: 85px;
  margin-right: 0.25rem;
}
.review-value {
  font-size: 0.74rem;
  font-weight: 600;
  padding: 0.15rem 0.45rem;
  border-radius: 6px;
  border: 1px solid transparent;
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
}
.review-value.correct { background: var(--good-tint); color: var(--good); border-color: var(--good-line); }
.review-value.incorrect { background: var(--bad-tint); color: var(--bad); border-color: var(--bad-line); }
.review-value.skipped { background: var(--flag-tint); color: var(--flag); border-color: var(--flag-line); }
.review-explanation-box {
  margin-top: 0.6rem;
  padding: 0.5rem 0.75rem;
  background: var(--surface-soft);
  border-left: 3px solid var(--accent);
  border-radius: 4px;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  align-items: flex-start;
  width: 100%;
}
.review-explanation-box .review-label {
  min-width: unset;
  margin-bottom: 2px;
  color: var(--accent-deep);
}
.explanation-text {
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--text-soft);
  width: 100%;
}
.review-explanation-images { width: 100%; margin-top: 0.35rem; }
.review-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 10px 0;
  margin-top: 12px;
  border-top: 1px solid var(--line);
}
.review-page-btn {
  background: var(--accent);
  color: var(--btn-primary-text);
  border: none;
  padding: 6px 14px;
  min-height: 36px;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.8rem;
  transition: background 0.15s;
}
.review-page-btn:hover { background: var(--accent-deep); }
.review-page-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.review-page-info { color: var(--text-faint); font-size: 0.82rem; }

/* recommended pro cross-sell */
.recommended-pro {
  margin: 12px 0;
  padding: 14px 16px;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: var(--radius-lg);
}
.recommended-pro p { margin: 6px 0 10px; font-size: 0.9em; color: var(--text-soft); }
.recommended-pro-cta {
  display: inline-block;
  font-weight: 600;
  color: var(--accent);
}
.results-pro-upsell {
  border-color: var(--accent-chip-border);
  background: var(--accent-tint);
}
.results-pro-cta {
  display: inline-block;
  padding: 0.55rem 1.1rem;
  background: var(--accent);
  color: var(--btn-primary-text);
  font-weight: 600;
  border-radius: var(--radius);
}
.results-pro-cta:hover { background: var(--accent-deep); }
.results-pro-cta:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.pass-story-invite { margin: 10px 0 0; font-size: 0.9em; color: var(--text-soft); }
.pass-story-invite a { color: var(--accent); font-weight: 600; }

/* results actions */
.results-actions-modern {
  padding: 1rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.action-btn {
  padding: 0.65rem 1.25rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  font-weight: 600;
  font-size: 0.875rem;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.action-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.action-btn .btn-icon {
  width: auto;
  height: auto;
  background: none;
  display: grid;
  place-items: center;
}
.action-btn .btn-icon i { font-size: 0.9rem; }
.btn-content { text-align: left; }
.btn-title { font-size: 0.875rem; font-weight: 600; }
.restart-btn { background: var(--accent); color: var(--btn-primary-text); }
.restart-btn:hover { background: var(--accent-deep); }
.home-btn {
  background: var(--surface);
  border-color: var(--line-strong);
  color: var(--text-soft);
}
.home-btn:hover { border-color: var(--text-faint); color: var(--text); }

/* resources (study) */
.resources-compact { display: flex; flex-direction: column; gap: 0.5rem; margin-top: 0.75rem; }
.resource-compact {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0.75rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--text);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  transition: border-color 0.15s;
}
.resource-compact:hover { border-color: var(--accent); }
.resource-compact i { color: var(--accent); }

/* ===== Responsive ===== */
@media (max-width: 920px) {
  .cr-workspace,
  .navigation-buttons { padding-left: 1.5rem; padding-right: 1.5rem; }
}

@media (max-width: 760px) {
  .cr-layout { grid-template-columns: 1fr; }
  .cr-rail {
    position: static;
    height: auto;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
  }
  .cr-pack { flex: 1 1 100%; order: 3; flex-direction: row; align-items: center; gap: 0.5rem; padding: 0.5rem 0.75rem; }
  .exam-timer { flex-direction: row; align-items: baseline; gap: 0.5rem; }
  .exam-timer .cr-timer-label { display: none; }
  #timer { font-size: 1.15rem; }
  .toggle-navigator { display: inline-flex; align-items: center; }
  .question-navigator {
    flex: 1 1 100%;
    order: 4;
  }
  .nav-grid { grid-template-columns: repeat(auto-fill, minmax(40px, 1fr)); }
  .nav-grid button { min-height: 44px; }
  .nav-legend { flex-direction: row; flex-wrap: wrap; gap: 0.75rem; }
  .exam-bottom-actions {
    margin: 0 0 0 auto;
    flex-direction: row;
    order: 2;
  }
  #finish-exam, .btn-review-marked, #switch-exam { width: auto; }
  .btn-review-marked span, #switch-exam span { display: none; }
  .cr-workspace { padding: 1.1rem 1rem 1rem; }
  .navigation-buttons { padding: 0.7rem 1rem; }
  .question-container { padding: 1.1rem 1rem; }
  .cr-qhead { gap: 0.5rem; }
  .sequence-wrapper, .ddselect-wrap { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
  .exam-confirm-actions { flex-direction: column-reverse; }
  .exam-confirm-btn { width: 100%; }
  .navigation-buttons .cr-keys-hint { display: none; }
}

/* keyboard hint chip in bottom bar */
.cr-keys-hint { font-size: 0.72rem; color: var(--text-faint); }
.cr-keys-hint kbd {
  font-family: var(--font-num);
  font-size: 0.68rem;
  border: 1px solid var(--line-strong);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 0 4px;
  background: var(--surface);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}