/* --- Practice Lab Central Theme System --- */
:root {
  --gold: #d6a82f;
  --gold-light: #f7df92;
  --success: #178b55;
  --danger: #c23b3b;
  --shadow: 0 22px 60px rgba(18, 24, 74, 0.13);

  /* Specific Practice Variables - Light Mode */
  --practice-page-bg: #f8fafc;
  --practice-surface: #ffffff;
  --practice-surface-2: #f1f5f9;
  --practice-card: #ffffff;
  --practice-text: #1e293b;
  --practice-text-muted: #64748b;
  --practice-border: #dbe3ef;
  --practice-accent: #d6a82f;
  --practice-accent-strong: #12184a;
  --practice-warning: #d97706;
  --practice-question-bg: #ffffff;
  --practice-question-text: #0f172a;
  --practice-option-text: #1e293b;
}

:root[data-theme="dark"] {
  --gold: #f1c96b;
  --gold-light: #fef08a;
  --shadow: 0 12px 28px rgba(0, 0, 0, 0.45);
  --bg-body: #0a0912;
  --bg-card: #1a172c;
  --bg-header: rgba(10, 9, 18, 0.90);
  --text: #eceaf8;

  /* Specific Practice Variables - Dark Mode */
  --practice-page-bg: #0a0912;
  --practice-surface: #141124;
  --practice-surface-2: #1e1b32;
  --practice-card: #1a172c;
  --practice-text: #eceaf8;
  --practice-text-muted: #a8a3c4;
  --practice-border: rgba(184, 176, 255, 0.15);
  --practice-accent: #f1c96b;
  --practice-accent-strong: #fef08a;
  --practice-warning: #f59e0b;
  --practice-question-bg: #18152e;
  --practice-question-text: #f8fafc;
  --practice-option-text: #eceaf8;
}

/* --- Dark Theme Overrides for Practice Lab --- */
:root[data-theme="dark"] body {
  color: var(--practice-text) !important;
  background: var(--practice-page-bg) !important;
}

:root[data-theme="dark"] 

/* Hero Section */
:root[data-theme="dark"] .hero-card {
  background: #1a172c !important;
  border: 1px solid rgba(184, 176, 255, 0.2) !important;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45) !important;
}

:root[data-theme="dark"] .hero-number {
  color: #f1c96b !important;
  opacity: 1 !important;
  text-shadow: 0 2px 10px rgba(241, 201, 107, 0.3) !important;
}

:root[data-theme="dark"] .hero-label {
  color: #eceaf8 !important;
  opacity: 1 !important;
}

/* Setup Cards & Form Controls */
:root[data-theme="dark"] .control-card,
:root[data-theme="dark"] .practice-card,
:root[data-theme="dark"] .future-card {
  background: #1a172c !important;
  border-color: rgba(184, 176, 255, 0.15) !important;
  color: #eceaf8 !important;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4) !important;
}

:root[data-theme="dark"] .section-heading h2,
:root[data-theme="dark"] .practice-header h2 {
  color: #f8fafc !important;
}

:root[data-theme="dark"] .setting-note {
  color: #a8a3c4 !important;
}

:root[data-theme="dark"] .field > span,
:root[data-theme="dark"] .setting-label {
  color: #eceaf8 !important;
}

:root[data-theme="dark"] .field select,
:root[data-theme="dark"] .fill-input,
:root[data-theme="dark"] .fraction-answer-box {
  background: #121020 !important;
  color: #eceaf8 !important;
  border: 1px solid rgba(184, 176, 255, 0.2) !important;
}

:root[data-theme="dark"] .field select option {
  background: #1a172c !important;
  color: #eceaf8 !important;
}

:root[data-theme="dark"] .compact-checks .toggle-chip span {
  color: #eceaf8 !important;
}

:root[data-theme="dark"] .compact-checks .toggle-chip:has(input:checked) span {
  color: #f1c96b !important;
}

:root[data-theme="dark"] .primary-button {
  background: linear-gradient(135deg, #f1c96b, #d6a82f) !important;
  color: #0f172a !important;
  font-weight: 900 !important;
  border: 0 !important;
  box-shadow: 0 8px 20px rgba(241, 201, 107, 0.25) !important;
}

:root[data-theme="dark"] .secondary-button {
  background: #2b2554 !important;
  color: #ffffff !important;
  border: 1px solid rgba(184, 176, 255, 0.2) !important;
}

:root[data-theme="dark"] .ghost-button {
  background: #221f38 !important;
  color: #ddd6fe !important;
  border: 1px solid rgba(184, 176, 255, 0.18) !important;
}

:root[data-theme="dark"] .mode-guide div {
  background: #121020 !important;
  border-color: rgba(184, 176, 255, 0.15) !important;
}

:root[data-theme="dark"] .mode-guide strong {
  color: #f8fafc !important;
}

:root[data-theme="dark"] .mode-guide span {
  color: #a8a3c4 !important;
}

/* Practice View & Questions */
:root[data-theme="dark"] .practice-summary {
  color: #a8a3c4 !important;
}

:root[data-theme="dark"] .status-pill {
  background: #2a244d !important;
  color: #f1c96b !important;
  border: 1px solid rgba(241, 201, 107, 0.3) !important;
}

:root[data-theme="dark"] .empty-state {
  background: #141124 !important;
  border-color: rgba(184, 176, 255, 0.2) !important;
  color: #a8a3c4 !important;
}

:root[data-theme="dark"] .empty-state strong {
  color: #f8fafc !important;
}

:root[data-theme="dark"] .question-item {
  background: #18152e !important;
  border: 1px solid rgba(184, 176, 255, 0.15) !important;
  color: #eceaf8 !important;
}

:root[data-theme="dark"] .question-number {
  background: #2a244d !important;
  color: #f1c96b !important;
}

:root[data-theme="dark"] .question-text {
  color: #f8fafc !important;
}

:root[data-theme="dark"] .option-card {
  background: #121020 !important;
  color: #eceaf8 !important;
  border: 1px solid rgba(184, 176, 255, 0.18) !important;
}

:root[data-theme="dark"] .option-dot {
  border-color: #a8a3c4 !important;
}

:root[data-theme="dark"] .option-choice input:checked + .option-card {
  background: #262045 !important;
  border-color: #f1c96b !important;
  color: #ffffff !important;
  box-shadow: 0 0 0 3px rgba(241, 201, 107, 0.2) !important;
}

:root[data-theme="dark"] .option-choice input:checked + .option-card .option-dot {
  border-color: #f1c96b !important;
  background: radial-gradient(circle at center, #f1c96b 0 45%, transparent 46%) !important;
}

:root[data-theme="dark"] .fraction-part {
  color: #eceaf8 !important;
}

:root[data-theme="dark"] .fraction-divider {
  background: #b8b0ff !important;
}

:root[data-theme="dark"] .timed-panel {
  background: rgba(20, 17, 36, 0.96) !important;
  border-bottom-color: rgba(184, 176, 255, 0.15) !important;
}

:root[data-theme="dark"] .timed-stat {
  background: #221f38 !important;
  color: #eceaf8 !important;
}

:root[data-theme="dark"] .timed-stat.strong {
  background: linear-gradient(135deg, #f1c96b, #d6a82f) !important;
  color: #0f172a !important;
}

:root[data-theme="dark"] .question-nav-button {
  background: #121020 !important;
  border-color: rgba(184, 176, 255, 0.15) !important;
  color: #eceaf8 !important;
}

:root[data-theme="dark"] .question-nav-button.current {
  background: #2a244d !important;
  border-color: #f1c96b !important;
  color: #f1c96b !important;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--practice-text);
  font-family: "Tahoma", "Noto Sans Thai", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 12% 8%, rgba(214, 168, 47, 0.18), transparent 28%),
    linear-gradient(180deg, #eef2fb 0%, #ffffff 44%, #f7f8fb 100%);
}

button, input, select { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: 0.55; }
.hero, .page-shell { width: min(1080px, calc(100% - 24px)); margin: 0 auto; }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 230px;
  align-items: center;
  gap: 28px;
  padding: 46px 0 64px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--gold);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1 { margin: 0; font-size: clamp(2.5rem, 7vw, 5rem); line-height: 1.05; }

.lead {
  max-width: 760px;
  margin: 18px 0 0;
  color: rgba(255, 255, 255, 0.84);
  font-size: clamp(1.05rem, 2.4vw, 1.35rem);
  line-height: 1.7;
}

.hero-card {
  min-height: 190px;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 8px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.11);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.18);
}

.hero-number { color: var(--gold-light); font-size: 4.25rem; font-weight: 900; line-height: 1; }
.hero-label { color: rgba(255, 255, 255, 0.78); font-weight: 700; }

.page-shell { display: grid; gap: 22px; padding: 28px 0 48px; }

.control-card, .practice-card, .future-card {
  border: 1px solid rgba(18, 24, 74, 0.08);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow);
}

.control-card, .future-card { padding: 24px; }
.section-heading h2, .practice-header h2 { margin: 0; color: var(--practice-accent-strong); font-size: clamp(1.35rem, 3vw, 2rem); }

.control-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(160px, 1fr));
  gap: 14px;
  align-items: end;
  margin-top: 18px;
}

.field { display: grid; gap: 8px; color: var(--practice-accent-strong); font-weight: 800; }
.operator-field { grid-column: span 2; }

.field select, .fill-input {
  width: 100%;
  min-height: 50px;
  border: 1px solid var(--practice-border);
  border-radius: 16px;
  color: var(--practice-text);
  background: var(--practice-card);
  padding: 0 14px;
  outline: none;
}

.field select:focus, .fill-input:focus {
  border-color: var(--gold);
  box-shadow: 0 0 0 4px rgba(214, 168, 47, 0.18);
}

.toggle-group {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.toggle-chip { position: relative; min-width: 0; }
.toggle-chip input { position: absolute; inset: 0; opacity: 0; cursor: pointer; }
.toggle-chip span {
  min-height: 50px;
  display: grid;
  place-items: center;
  border-radius: 16px;
  border: 1px solid var(--practice-border);
  background: var(--practice-card);
  color: var(--practice-accent-strong);
  font-weight: 900;
  transition: 0.18s ease;
}
.toggle-chip input:checked + span {
  border-color: rgba(214, 168, 47, 0.85);
  background: linear-gradient(135deg, #fff8df, #f4da7a);
  box-shadow: 0 0 0 3px rgba(214, 168, 47, 0.15);
}

.primary-button, .secondary-button, .ghost-button {
  min-height: 50px;
  border: 0;
  border-radius: 16px;
  padding: 0 18px;
  font-weight: 900;
}
.primary-button { color: var(--practice-accent-strong); background: linear-gradient(135deg, var(--gold-light), var(--gold)); box-shadow: 0 12px 22px rgba(214, 168, 47, 0.26); }
.secondary-button { color: var(--practice-card); background: var(--practice-accent-strong); }
.ghost-button { color: var(--practice-accent-strong); background: #eef2fb; }

.practice-card { padding: 0; overflow: hidden; }
.practice-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 28px 24px 22px;
  border-bottom: 1px solid var(--practice-border);
}
.practice-summary { margin: 10px 0 0; color: var(--practice-text-muted); line-height: 1.75; }
.status-pill { white-space: nowrap; border-radius: 999px; padding: 12px 16px; color: var(--practice-accent-strong); background: #f3ead0; font-weight: 800; }

.empty-state {
  margin: 24px;
  display: grid;
  place-items: center;
  text-align: center;
  gap: 8px;
  min-height: 120px;
  padding: 26px;
  border: 1px dashed #d7dcec;
  border-radius: 24px;
  background: linear-gradient(180deg, #fafbff 0%, #f4f7fd 100%);
  color: var(--practice-text-muted);
}
.empty-state strong { color: var(--practice-accent-strong); font-size: 1.8rem; }

.question-list { list-style: none; margin: 0; padding: 0 24px 8px; display: grid; gap: 18px; }
.question-item { border: 1px solid var(--practice-border); border-radius: 24px; background: #fff; padding: 20px; }
.question-head { display: flex; align-items: center; gap: 16px; margin-bottom: 16px; }
.question-number {
  flex: 0 0 auto;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  color: var(--practice-accent-strong);
  background: #f3e9c6;
  font-weight: 900;
}
.question-text { color: var(--practice-accent-strong); font-size: clamp(1.25rem, 2.1vw, 1.65rem); font-weight: 900; letter-spacing: 0.01em; }

.option-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.option-choice { position: relative; }
.option-choice input { position: absolute; inset: 0; opacity: 0; cursor: pointer; }
.option-card {
  min-height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 16px;
  border: 1px solid var(--practice-border);
  border-radius: 18px;
  background: #fff;
  color: var(--practice-accent-strong);
  font-weight: 900;
  text-align: center;
  transition: 0.18s ease;
}
.option-dot { width: 16px; height: 16px; border-radius: 50%; border: 2px solid #9aa5bf; flex: 0 0 auto; }
.option-choice input:checked + .option-card { border-color: rgba(214, 168, 47, 0.8); background: #fff8df; box-shadow: 0 0 0 3px rgba(214, 168, 47, 0.16); }
.option-choice input:checked + .option-card .option-dot { border-color: var(--gold); background: radial-gradient(circle at center, var(--gold) 0 45%, transparent 46%); }

.fill-row { display: grid; grid-template-columns: minmax(180px, 320px); gap: 10px; align-items: center; }
.fill-input { font-weight: 900; color: var(--practice-accent-strong); }

.feedback { display: block; margin-top: 14px; font-weight: 800; }
.question-item.correct { border-color: rgba(23, 139, 85, 0.3); background: rgba(23, 139, 85, 0.03); }
.question-item.correct .feedback { color: var(--success); }
.question-item.incorrect { border-color: rgba(194, 59, 59, 0.28); background: rgba(194, 59, 59, 0.03); }
.question-item.incorrect .feedback { color: var(--danger); }

.question-item.near-correct {
  border-color: rgba(214, 168, 47, 0.42);
  background: rgba(214, 168, 47, 0.06);
}

.question-item.near-correct .feedback {
  color: #9a6a00;
}

.result-panel.passed {
  background: linear-gradient(135deg, #0f7a4d, #178b55);
}

.result-panel.failed {
  background: linear-gradient(135deg, #12184a, #7c2d12);
}

.result-panel {
  margin: 16px 24px 0;
  padding: 18px 20px;
  display: grid;
  gap: 6px;
  border-radius: 20px;
  color: var(--practice-card);
  background: linear-gradient(135deg, var(--practice-accent-strong), var(--practice-surface-2));
}
.action-row { display: flex; flex-wrap: wrap; gap: 12px; padding: 24px; }
.future-list { margin: 18px 0 0; padding-left: 22px; display: grid; gap: 10px; color: var(--practice-text-muted); line-height: 1.75; }

.question-text,
.option-text,
.feedback {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.28em;
}

.option-text {
  justify-content: center;
}

.stacked-fraction {
  display: inline-grid;
  grid-template-rows: auto auto;
  align-items: center;
  justify-items: center;
  min-width: 1.15em;
  line-height: 1;
  vertical-align: middle;
  font-weight: 900;
}

.frac-num,
.frac-den {
  display: block;
  padding: 0 0.16em;
}

.frac-num {
  border-bottom: 2px solid currentColor;
  padding-bottom: 0.08em;
}

.frac-den {
  padding-top: 0.08em;
}

.math-operator {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 0.8em;
}

.option-card .stacked-fraction {
  font-size: 1.05em;
}

.feedback .stacked-fraction {
  font-size: 1.05em;
}

@media (max-width: 980px) {
  .control-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero { grid-template-columns: 1fr; }
  .hero-card { min-height: 150px; }
}
@media (max-width: 720px) {
  .question-list { padding: 0 16px 8px; }
  .practice-header, .action-row { padding-left: 16px; padding-right: 16px; }
  .empty-state, .result-panel { margin-left: 16px; margin-right: 16px; }
  .control-card, .future-card { padding: 18px; }
  .operator-field { grid-column: span 2; }
  .option-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .question-head { align-items: flex-start; }
  .practice-header { flex-direction: column; }
}
@media (max-width: 520px) {

  .control-grid { grid-template-columns: 1fr; }
  .operator-field { grid-column: span 1; }
  .toggle-group { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .option-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .fill-row { grid-template-columns: 1fr; }
  .question-text { font-size: 1.15rem; }
  .question-item { padding: 16px; }
}

/* v7: stacked fraction answer input for mobile/tablet typing */
.fraction-fill-row {
  grid-template-columns: 1fr;
}

.fraction-answer-input {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
}

.answer-label {
  color: var(--practice-accent-strong);
  font-weight: 900;
}

.fraction-answer-box {
  display: inline-grid;
  grid-template-rows: auto 2px auto;
  align-items: center;
  justify-items: center;
  min-width: 118px;
  padding: 10px 12px;
  border: 1px solid var(--practice-border);
  border-radius: 18px;
  background: #fff;
}

.fraction-divider {
  width: 100%;
  height: 2px;
  border-radius: 999px;
  background: var(--practice-accent-strong);
}

.fraction-part {
  width: 92px;
  min-height: 42px;
  border: 0;
  background: transparent;
  color: var(--practice-accent-strong);
  font-weight: 900;
  font-size: 1.1rem;
  text-align: center;
  outline: none;
}

.fraction-part::placeholder {
  color: #98a2b3;
  font-weight: 700;
}

.fraction-part[aria-invalid="true"] {
  color: var(--danger);
}

.fraction-answer-box:focus-within {
  border-color: var(--gold);
  box-shadow: 0 0 0 4px rgba(214, 168, 47, 0.18);
}

.fraction-input-hint {
  color: var(--practice-text-muted);
  font-size: 0.9rem;
  line-height: 1.45;
}

@media (max-width: 720px) {
  .fraction-answer-input {
    align-items: flex-start;
  }

  .fraction-answer-box {
    min-width: 104px;
    padding: 8px 10px;
  }

  .fraction-part {
    width: 78px;
    min-height: 38px;
    font-size: 1rem;
  }

  .fraction-input-hint {
    flex-basis: 100%;
    font-size: 0.84rem;
  }
}

@media (max-width: 420px) {
  .fraction-answer-input {
    gap: 10px;
  }

  .fraction-answer-box {
    min-width: 96px;
  }

  .fraction-part {
    width: 70px;
  }
}

/* v9: compact chip-based control panel */
[hidden] { display: none !important; }

.setting-note {
  margin: 8px 0 0;
  color: var(--practice-text-muted);
  line-height: 1.65;
}

.chip-control-grid {
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 18px;
}

.setting-block {
  display: grid;
  gap: 10px;
  min-width: 0;
}

.setting-label {
  color: var(--practice-accent-strong);
  font-weight: 900;
  line-height: 1.3;
}

.span-4 { grid-column: span 4; }
.span-8 { grid-column: span 8; }

.toggle-group.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.toggle-group.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.toggle-group.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.action-block {
  align-self: end;
}

.action-block .primary-button {
  width: 100%;
}

.toggle-chip span {
  user-select: none;
  padding: 0 10px;
  white-space: nowrap;
}

.toggle-chip input:focus-visible + span {
  outline: 3px solid rgba(214, 168, 47, 0.35);
  outline-offset: 2px;
}

.result-panel.passed strong {
  font-size: 1.25rem;
}

@media (max-width: 980px) {
  .chip-control-grid { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .span-4, .span-8 { grid-column: span 6; }
}

@media (max-width: 720px) {
  .chip-control-grid { grid-template-columns: 1fr; }
  .span-4, .span-8 { grid-column: span 1; }
  .toggle-group.four { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .toggle-group.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .toggle-chip span {
    min-height: 46px;
    font-size: 0.95rem;
  }
}

@media (max-width: 430px) {
  .toggle-group.three { grid-template-columns: 1fr; }
  .toggle-group.two, .toggle-group.four { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* v10: hybrid control panel — dropdowns for single choice, compact checkboxes for multi-select */
.hybrid-control-grid {
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 18px;
  align-items: end;
}

.span-3 { grid-column: span 3; }
.span-6 { grid-column: span 6; }

.hybrid-control-grid .field {
  display: grid;
  gap: 10px;
}

.hybrid-control-grid .field > span {
  color: var(--practice-accent-strong);
  font-weight: 900;
  line-height: 1.3;
}

.toggle-group.one { grid-template-columns: 1fr; }

.compact-checks {
  gap: 10px;
}

.compact-checks .toggle-chip {
  min-width: 0;
  min-height: 50px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--practice-border);
  border-radius: 16px;
  background: #fff;
  color: var(--practice-accent-strong);
  font-weight: 900;
  cursor: pointer;
  transition: 0.18s ease;
}

.compact-checks .toggle-chip input {
  position: static;
  opacity: 1;
  width: 18px;
  height: 18px;
  accent-color: var(--gold);
  cursor: pointer;
  flex: 0 0 auto;
}

.compact-checks .toggle-chip span,
.compact-checks .toggle-chip input:checked + span {
  min-height: auto;
  display: inline;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: inherit;
  box-shadow: none;
  white-space: normal;
}

.compact-checks .toggle-chip:has(input:checked) {
  border-color: rgba(214, 168, 47, 0.85);
  background: #fff8df;
  box-shadow: 0 0 0 3px rgba(214, 168, 47, 0.12);
}

.compact-check-field .setting-label {
  margin-bottom: 0;
}

@media (max-width: 980px) {
  .hybrid-control-grid { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .span-3 { grid-column: span 3; }
  .span-6 { grid-column: span 6; }
}

@media (max-width: 720px) {
  .hybrid-control-grid { grid-template-columns: 1fr; }
  .span-3, .span-6 { grid-column: span 1; }
  .compact-checks.toggle-group.four { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .compact-checks .toggle-chip { min-height: 46px; font-size: 0.95rem; }
}

/* v11: real compact checkbox controls — not large button chips */
.compact-checks,
.compact-checks.toggle-group,
.compact-checks.toggle-group.one,
.compact-checks.toggle-group.four {
  display: flex !important;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
}

.compact-checks .toggle-chip,
.compact-checks .toggle-chip:has(input:checked) {
  min-height: auto;
  display: inline-flex;
  width: auto;
  align-items: center;
  gap: 7px;
  padding: 3px 4px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  box-shadow: none;
  color: var(--practice-accent-strong);
  font-size: 0.98rem;
  line-height: 1.35;
  font-weight: 800;
}

.compact-checks .toggle-chip:hover {
  background: rgba(214, 168, 47, 0.08);
}

.compact-checks .toggle-chip input {
  width: 18px;
  height: 18px;
  margin: 0;
  accent-color: var(--gold);
}

.compact-checks .toggle-chip span,
.compact-checks .toggle-chip input:checked + span {
  white-space: nowrap;
  color: var(--practice-accent-strong);
}

.compact-checks .toggle-chip:has(input:checked) span {
  color: #8a650c;
}

.operator-field.compact-check-field {
  align-self: center;
}

.compact-check-field .setting-label {
  display: block;
  margin-bottom: 8px;
}

@media (max-width: 720px) {
  .compact-checks,
  .compact-checks.toggle-group,
  .compact-checks.toggle-group.one,
  .compact-checks.toggle-group.four {
    gap: 8px 14px;
  }

  .compact-checks .toggle-chip,
  .compact-checks .toggle-chip:has(input:checked) {
    font-size: 0.95rem;
    min-height: auto;
    padding: 2px 4px;
  }
}

/* v14: step view + practice mode guide */
.mode-guide {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-top: 18px;
}
.mode-guide div {
  padding: 12px 14px;
  border: 1px solid var(--practice-border);
  border-radius: 16px;
  background: #f8fafc;
}
.mode-guide strong {
  display: block;
  color: var(--practice-accent-strong);
  font-size: 0.95rem;
  margin-bottom: 4px;
}
.mode-guide span {
  display: block;
  color: var(--practice-text-muted);
  font-size: 0.86rem;
  line-height: 1.55;
}
#practiceView[hidden], #setupView[hidden], #futureView[hidden] {
  display: none !important;
}
@media (max-width: 900px) {
  .mode-guide { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 560px) {
  .mode-guide { grid-template-columns: 1fr; }
}

/* v15: timed mode switches to single-question exam-style view */
.timed-panel {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  gap: 12px;
  padding: 14px 24px 16px;
  border-bottom: 1px solid var(--practice-border);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  box-shadow: 0 12px 26px rgba(18, 24, 74, 0.08);
}

.timed-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.timed-stat {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 7px 12px;
  border-radius: 999px;
  background: #eef2fb;
  color: var(--practice-accent-strong);
  font-weight: 900;
}

.timed-stat.strong {
  color: var(--practice-accent-strong);
  background: linear-gradient(135deg, var(--gold-light), var(--gold));
  box-shadow: 0 8px 18px rgba(214, 168, 47, 0.22);
}

.question-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.question-nav-button {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border: 1px solid var(--practice-border);
  border-radius: 13px;
  background: #ffffff;
  color: var(--practice-accent-strong);
  font-weight: 900;
  transition: 0.16s ease;
}

.question-nav-button.current {
  border-color: var(--gold);
  background: #fff8df;
  box-shadow: 0 0 0 3px rgba(214, 168, 47, 0.16);
}

.question-nav-button.answered {
  border-color: rgba(18, 24, 74, 0.26);
  background: #eef2fb;
}

.question-nav-button.correct {
  border-color: rgba(23, 139, 85, 0.35);
  background: rgba(23, 139, 85, 0.12);
  color: #0f7a4d;
}

.question-nav-button.incorrect {
  border-color: rgba(194, 59, 59, 0.35);
  background: rgba(194, 59, 59, 0.12);
  color: #9f2f2f;
}

.question-nav-button.near-correct {
  border-color: rgba(214, 168, 47, 0.55);
  background: rgba(214, 168, 47, 0.12);
  color: #8a6100;
}

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

.compact-nav-button {
  min-height: 42px;
  padding-inline: 14px;
}

.practice-card.timed-mode .question-list {
  padding-top: 24px;
}

.practice-card.timed-mode .question-item {
  max-width: 840px;
  width: 100%;
  margin: 0 auto;
  padding: clamp(20px, 4vw, 34px);
}

.practice-card.timed-mode .question-head {
  align-items: flex-start;
  margin-bottom: 22px;
}

.practice-card.timed-mode .question-number {
  width: 48px;
  height: 48px;
  border-radius: 16px;
  font-size: 1.1rem;
}

.practice-card.timed-mode .question-text {
  font-size: clamp(1.45rem, 3.2vw, 2.15rem);
}

.practice-card.timed-mode .option-grid {
  gap: 14px;
}

.practice-card.timed-mode .option-card {
  min-height: 72px;
  font-size: 1.08rem;
}

.practice-card.timed-mode .action-row {
  position: sticky;
  bottom: 0;
  z-index: 18;
  border-top: 1px solid var(--practice-border);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  box-shadow: 0 -12px 26px rgba(18, 24, 74, 0.08);
}

@media (max-width: 720px) {
  .timed-panel {
    padding: 12px 16px 14px;
  }

  .timed-stats {
    gap: 8px;
  }

  .timed-stat {
    min-height: 34px;
    padding: 6px 10px;
    font-size: 0.9rem;
  }

  .question-nav-button {
    width: 34px;
    height: 34px;
    border-radius: 11px;
    font-size: 0.92rem;
  }

  .practice-card.timed-mode .question-list {
    padding-top: 18px;
  }

  .practice-card.timed-mode .option-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .practice-card.timed-mode .option-card {
    min-height: 68px;
    padding: 10px 8px;
  }

  .practice-card.timed-mode .action-row {
    padding-top: 14px;
    padding-bottom: 14px;
  }
}

/* v16: compact layout refresh */
.hero, .page-shell { width: min(1080px, calc(100% - 24px)); margin: 0 auto; }

.hero {
  grid-template-columns: minmax(0, 1fr) 170px;
  gap: 20px;
  padding: 20px 0 28px;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.8rem);
}

.lead {
  margin-top: 10px;
  font-size: clamp(0.96rem, 1.8vw, 1.1rem);
  line-height: 1.55;
}

.hero-card {
  min-height: 138px;
  border-radius: 24px;
}

.hero-number {
  font-size: 3.2rem;
}

.page-shell {
  gap: 16px;
  padding: 18px 0 28px;
}

.control-card, .future-card {
  padding: 18px;
}

.section-heading.compact h2,
.practice-header h2 {
  font-size: clamp(1.25rem, 2.4vw, 1.75rem);
}

.setting-note {
  margin-top: 6px;
  font-size: 0.94rem;
  line-height: 1.5;
}

.hybrid-control-grid {
  gap: 12px 14px;
  margin-top: 14px;
}

.hybrid-control-grid .field,
.setting-block {
  gap: 6px;
}

.field select,
.fill-input,
.primary-button,
.secondary-button,
.ghost-button {
  min-height: 44px;
}

.hybrid-control-grid .field > span,
.setting-label,
.field,
.control-card .field {
  font-size: 0.98rem;
}

.compact-check-field .setting-label {
  margin-bottom: 4px;
}

.compact-checks,
.compact-checks.toggle-group,
.compact-checks.toggle-group.one,
.compact-checks.toggle-group.four {
  gap: 6px 12px;
}

.compact-checks .toggle-chip,
.compact-checks .toggle-chip:has(input:checked) {
  font-size: 0.94rem;
}

.mode-guide {
  gap: 8px;
  margin-top: 14px;
}

.mode-guide div {
  padding: 10px 12px;
  border-radius: 14px;
}

.mode-guide strong {
  font-size: 0.9rem;
  margin-bottom: 2px;
}

.mode-guide span {
  font-size: 0.8rem;
  line-height: 1.45;
}

.practice-header {
  gap: 10px;
  padding: 18px 20px 14px;
}

.practice-summary {
  margin-top: 6px;
  font-size: 0.95rem;
  line-height: 1.45;
}

.status-pill {
  padding: 9px 14px;
  font-size: 0.94rem;
}

.practice-card.timed-mode .practice-header .status-pill {
  display: none;
}

.practice-card.timed-mode .practice-header {
  padding-bottom: 10px;
}

.empty-state {
  margin: 16px 18px;
  min-height: 92px;
  padding: 18px;
  border-radius: 18px;
}

.empty-state strong {
  font-size: 1.35rem;
}

.question-list {
  padding: 0 18px 6px;
  gap: 14px;
}

.question-item {
  border-radius: 18px;
  padding: 16px;
}

.question-head {
  gap: 12px;
  margin-bottom: 14px;
}

.question-number {
  width: 36px;
  height: 36px;
  border-radius: 12px;
}

.question-text {
  font-size: clamp(1.15rem, 1.9vw, 1.4rem);
}

.option-grid {
  gap: 10px;
}

.option-card {
  min-height: 54px;
  padding: 10px 12px;
  border-radius: 14px;
}

.fill-row {
  grid-template-columns: minmax(150px, 260px);
}

.feedback {
  margin-top: 10px;
}

.result-panel {
  margin: 12px 18px 0;
  padding: 14px 16px;
  border-radius: 16px;
}

.action-row {
  gap: 10px;
  padding: 18px;
}

.action-row .secondary-button,
.action-row .ghost-button {
  min-height: 44px;
  padding-inline: 16px;
}

.timed-panel {
  display: grid;
  gap: 8px;
  padding: 10px 18px 12px;
}

.timed-stats {
  gap: 8px;
}

.timed-stat {
  min-height: 32px;
  padding: 5px 11px;
  font-size: 0.92rem;
}

.question-nav {
  gap: 6px;
}

.question-nav-button {
  width: 34px;
  height: 34px;
  border-radius: 11px;
}

.timed-move-row {
  gap: 8px;
}

.compact-nav-button {
  min-height: 38px;
  padding-inline: 12px;
}

.practice-card.timed-mode .question-list {
  padding-top: 14px;
}

.practice-card.timed-mode .question-item {
  max-width: 760px;
  padding: 18px;
}

.practice-card.timed-mode .question-head {
  margin-bottom: 16px;
}

.practice-card.timed-mode .question-number {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  font-size: 1rem;
}

.practice-card.timed-mode .question-text {
  font-size: clamp(1.2rem, 2.4vw, 1.85rem);
}

.practice-card.timed-mode .option-grid {
  gap: 10px;
}

.practice-card.timed-mode .option-card {
  min-height: 60px;
  font-size: 1rem;
}

.practice-card.timed-mode .action-row {
  gap: 8px;
  padding: 12px 16px;
}

@media (max-width: 980px) {
.hero, .page-shell { width: min(1080px, calc(100% - 24px)); margin: 0 auto; }

  .hero {
    grid-template-columns: 1fr;
    padding: 16px 0 20px;
  }

  .hero-card {
    min-height: 110px;
  }

  .mode-guide {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
.hero, .page-shell { width: min(1080px, calc(100% - 24px)); margin: 0 auto; }

  .hero {
    gap: 10px;
    padding: 10px 0 14px;
  }

  .hero .eyebrow {
    margin-bottom: 4px;
  }

  .hero h1 {
    font-size: 2.05rem;
  }

  .lead {
    margin-top: 8px;
    font-size: 0.92rem;
    line-height: 1.45;
  }

  .hero-card {
    display: none;
  }

  .control-card,
  .future-card,
  .practice-header,
  .action-row,
  .timed-panel {
    padding-left: 14px;
    padding-right: 14px;
  }

  .control-card,
  .future-card {
    padding-top: 14px;
    padding-bottom: 14px;
  }

  .hybrid-control-grid {
    gap: 10px;
  }

  .field select,
  .fill-input,
  .primary-button,
  .secondary-button,
  .ghost-button {
    min-height: 42px;
  }

  .mode-guide {
    grid-template-columns: 1fr 1fr;
  }

  .practice-header {
    gap: 8px;
    padding-top: 14px;
    padding-bottom: 10px;
  }

  .practice-summary {
    font-size: 0.9rem;
    line-height: 1.4;
  }

  .empty-state {
    margin: 12px 14px;
    min-height: 80px;
    padding: 16px 14px;
  }

  .empty-state strong {
    font-size: 1.2rem;
  }

  .question-list {
    padding: 0 14px 4px;
    gap: 12px;
  }

  .question-item,
  .practice-card.timed-mode .question-item {
    padding: 14px;
    border-radius: 16px;
  }

  .question-head,
  .practice-card.timed-mode .question-head {
    gap: 10px;
    margin-bottom: 12px;
  }

  .question-number,
  .practice-card.timed-mode .question-number {
    width: 34px;
    height: 34px;
    border-radius: 11px;
    font-size: 0.98rem;
  }

  .question-text,
  .practice-card.timed-mode .question-text {
    font-size: 1.1rem;
    line-height: 1.3;
  }

  .option-grid,
  .practice-card.timed-mode .option-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
  }

  .option-card,
  .practice-card.timed-mode .option-card {
    min-height: 52px;
    padding: 8px 10px;
    border-radius: 14px;
    font-size: 0.95rem;
  }

  .timed-panel {
    gap: 8px;
    padding-top: 8px;
    padding-bottom: 10px;
  }

  .timed-stats {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
  }

  .timed-stat {
    justify-content: center;
    min-height: 34px;
    padding: 6px 8px;
    font-size: 0.88rem;
  }

  .question-nav {
    gap: 6px;
  }

  .question-nav-button {
    width: 32px;
    height: 32px;
    border-radius: 10px;
    font-size: 0.9rem;
  }

  .timed-move-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }

  .compact-nav-button {
    min-height: 38px;
    padding-inline: 0;
  }

  .result-panel {
    margin: 10px 14px 0;
    padding: 12px 14px;
  }

  .practice-card.timed-mode .action-row,
  .action-row {
    gap: 8px;
    padding-top: 12px;
    padding-bottom: 12px;
  }

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

  .action-row button:last-child {
    grid-column: 1 / -1;
  }
}

@media (max-width: 520px) {

  .hero h1 {
    font-size: 1.85rem;
  }

  .hybrid-control-grid .field > span,
  .setting-label {
    font-size: 0.95rem;
  }

  .mode-guide {
    grid-template-columns: 1fr;
  }

  .timed-stats {
    grid-template-columns: 1fr;
  }

  .timed-stat {
    justify-content: flex-start;
  }
}

/* v17: clearer controls + compact timed layout with question buttons under choices */
.field select {
  border-color: #cfd7e8;
  background-color: #ffffff;
  box-shadow: inset 0 0 0 1px rgba(18, 24, 74, 0.03), 0 2px 8px rgba(18, 24, 74, 0.04);
  font-weight: 900;
  background-image:
    linear-gradient(45deg, transparent 50%, #12184a 50%),
    linear-gradient(135deg, #12184a 50%, transparent 50%);
  background-position:
    calc(100% - 18px) 50%,
    calc(100% - 12px) 50%;
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
  appearance: none;
  padding-right: 34px;
}

.field select:hover {
  border-color: rgba(214, 168, 47, 0.75);
  box-shadow: inset 0 0 0 1px rgba(214, 168, 47, 0.12), 0 4px 12px rgba(18, 24, 74, 0.07);
}

.mode-guide-details {
  margin-top: 14px;
}

.mode-guide-details summary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 34px;
  padding: 7px 12px;
  border-radius: 999px;
  border: 1px solid #d9e0ee;
  background: #ffffff;
  color: var(--practice-accent-strong);
  font-weight: 900;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(18, 24, 74, 0.05);
}

.mode-guide-details[open] summary {
  border-color: rgba(214, 168, 47, 0.75);
  background: #fff8df;
}

.mode-guide-details .mode-guide {
  margin-top: 10px;
}

.practice-card.timed-mode .question-item,
.question-item {
  border-color: #d3dbea;
  box-shadow: 0 10px 24px rgba(18, 24, 74, 0.055);
}

.practice-card.timed-mode .question-item {
  border-width: 1.5px;
}

.timed-bottom-nav {
  display: grid;
  gap: 10px;
  max-width: 840px;
  width: calc(100% - 36px);
  margin: 0 auto 12px;
  padding: 10px 0 0;
}

.timed-bottom-nav .question-nav {
  justify-content: center;
}

.timed-bottom-nav .timed-move-row {
  justify-content: center;
}

.timed-bottom-nav .compact-nav-button {
  min-width: 128px;
}

.practice-card.timed-mode .timed-panel {
  padding-top: 9px;
  padding-bottom: 9px;
}

.practice-card.timed-mode .timed-stats {
  justify-content: space-between;
}

.practice-card.timed-mode .question-list {
  padding-top: 14px;
  padding-bottom: 8px;
}

.practice-card.timed-mode .question-item {
  margin-bottom: 0;
}

@media (min-width: 721px) {
  .practice-card.timed-mode .timed-stats {
    justify-content: flex-start;
  }
}

@media (max-width: 720px) {
  .field select {
    min-height: 40px;
    border-radius: 14px;
  }

  .mode-guide-details {
    margin-top: 10px;
  }

  .mode-guide-details summary {
    min-height: 32px;
    padding: 6px 10px;
    font-size: 0.9rem;
  }

  .practice-card.timed-mode .practice-header {
    padding-top: 12px;
    padding-bottom: 8px;
  }

  .practice-card.timed-mode .practice-summary {
    font-size: 0.88rem;
  }

  .practice-card.timed-mode .timed-panel {
    padding: 8px 14px;
  }

  .practice-card.timed-mode .timed-stats {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 8px;
  }

  .practice-card.timed-mode #questionCounterDisplay {
    order: 1;
    justify-content: flex-start;
  }

  .practice-card.timed-mode #timerTopDisplay {
    order: 2;
    justify-content: flex-end;
  }

  .practice-card.timed-mode .answered-stat {
    display: none;
  }

  .practice-card.timed-mode .timed-stat {
    min-height: 32px;
    padding: 6px 10px;
    font-size: 0.95rem;
  }

  .practice-card.timed-mode .timed-stat.strong {
    min-width: 112px;
  }

  .practice-card.timed-mode .question-list {
    padding-top: 10px;
    padding-bottom: 8px;
  }

  .timed-bottom-nav {
    width: calc(100% - 28px);
    gap: 9px;
    margin-bottom: 8px;
    padding-top: 0;
  }

  .timed-bottom-nav .question-nav {
    justify-content: flex-start;
    gap: 6px;
  }

  .question-nav-button {
    width: 31px;
    height: 31px;
    border-radius: 10px;
  }

  .timed-bottom-nav .timed-move-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }

  .timed-bottom-nav .compact-nav-button {
    min-width: 0;
    min-height: 38px;
  }

  .practice-card.timed-mode .question-item {
    border-color: #cfd8ea;
    box-shadow: 0 8px 20px rgba(18, 24, 74, 0.07);
  }
}

@media (max-width: 420px) {
  .practice-card.timed-mode .timed-stats {
    grid-template-columns: 1fr auto;
  }

  .practice-card.timed-mode .timed-stat {
    font-size: 0.9rem;
    padding: 5px 9px;
  }

  .practice-card.timed-mode .timed-stat.strong {
    min-width: 104px;
  }

  .question-nav-button {
    width: 30px;
    height: 30px;
    font-size: 0.86rem;
  }
}

/* Hero Stat Card Contrast Rules - Light & Dark Mode */
.hero-card {
  min-height: 180px;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 6px;
  border-radius: 24px;
  padding: 20px;
  transition: all 0.2s ease;
}

:root[data-theme="light"] .hero-card {
  background: #ffffff !important;
  border: 1px solid #dbe3ef !important;
  box-shadow: 0 10px 30px rgba(18, 24, 74, 0.08) !important;
}

:root[data-theme="light"] .hero-number {
  color: #b4860b !important;
  font-size: 4.25rem !important;
  font-weight: 900 !important;
  line-height: 1 !important;
  opacity: 1 !important;
}

:root[data-theme="light"] .hero-label {
  color: #12184a !important;
  font-weight: 800 !important;
  font-size: 1.05rem !important;
  opacity: 1 !important;
}

:root[data-theme="dark"] .hero-card {
  background: #1a172c !important;
  border: 1px solid rgba(184, 176, 255, 0.2) !important;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45) !important;
}

:root[data-theme="dark"] .hero-number {
  color: #f1c96b !important;
  font-size: 4.25rem !important;
  font-weight: 900 !important;
  line-height: 1 !important;
  opacity: 1 !important;
  text-shadow: 0 2px 10px rgba(241, 201, 107, 0.3) !important;
}

:root[data-theme="dark"] .hero-label {
  color: #eceaf8 !important;
  font-weight: 800 !important;
  font-size: 1.05rem !important;
  opacity: 1 !important;
}