:root,
[data-theme="parchment"] {
  color-scheme: light;
  --bg: #e7d7b8;
  --panel: rgba(247, 238, 220, 0.88);
  --line: rgba(48, 36, 22, 0.16);
  --line-strong: rgba(48, 36, 22, 0.42);
  --sea: #2f5f5c;
  --brass: #a56b24;
  --ink: #2a2118;
  --muted: #6b5b48;
  --paper: #f7eedc;
  --input: #fffaf0;
  --ok: #2c6b4a;
  --bad: #9a3a2c;
  --gold: #a56b24;
  --shadow: 0 22px 60px rgba(70, 46, 18, 0.14);
  --radius: 20px;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans: "Segoe UI", "Helvetica Neue", system-ui, sans-serif;
  --mono: ui-monospace, "Cascadia Code", "SF Mono", Menlo, Consolas, monospace;
  --sky-top: #f3e2c4;
  --sky-bot: #d9c49a;
  --chart: rgba(47, 95, 92, 0.55);
  --coast: rgba(42, 33, 24, 0.45);
  --cell-past: rgba(154, 58, 44, 0.08);
  --cell-present: rgba(47, 95, 92, 0.1);
  --cell-future: rgba(165, 107, 36, 0.1);
}

[data-theme="ink"] {
  color-scheme: dark;
  --bg: #10161d;
  --panel: rgba(18, 26, 34, 0.86);
  --line: rgba(214, 196, 160, 0.16);
  --line-strong: rgba(214, 196, 160, 0.42);
  --sea: #86c4bc;
  --brass: #d4a45a;
  --ink: #efe4cf;
  --muted: #9aa6a8;
  --paper: #161e27;
  --input: #0e141b;
  --ok: #8fddb5;
  --bad: #ef8f86;
  --gold: #d4a45a;
  --shadow: 0 22px 60px rgba(0, 0, 0, 0.45);
  --sky-top: #18222c;
  --sky-bot: #0c1016;
  --chart: rgba(134, 196, 188, 0.28);
  --coast: rgba(239, 228, 207, 0.28);
  --cell-past: rgba(239, 143, 134, 0.08);
  --cell-present: rgba(134, 196, 188, 0.1);
  --cell-future: rgba(212, 164, 90, 0.1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.55;
}

.atmosphere {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.sky {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 82% 12%, color-mix(in srgb, var(--brass) 28%, transparent), transparent 28%),
    linear-gradient(180deg, var(--sky-top), var(--sky-bot));
}

.chart {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  color: var(--chart);
}

.chart .coast {
  color: var(--coast);
}

.chart .faint {
  opacity: 0.45;
}

.chart .rose {
  color: var(--brass);
  font-family: var(--serif);
  font-size: 14px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 20;
  background: var(--sea);
  color: var(--paper);
  padding: 0.5rem 0.8rem;
  font-weight: 700;
}

.skip-link:focus {
  top: 1rem;
}

.app {
  position: relative;
  z-index: 1;
  max-width: 920px;
  margin: 0 auto;
  padding: 2.4rem 1.2rem 3rem;
}

.masthead {
  margin-bottom: 1.6rem;
}

.masthead-row,
.play-top,
.answer-row,
.actions,
.panel-head,
.lex-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  align-items: center;
}

.masthead-row,
.play-top,
.panel-head {
  justify-content: space-between;
}

.eyebrow {
  margin: 0;
  color: var(--sea);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-size: 0.72rem;
  font-weight: 700;
}

.theme-btn {
  appearance: none;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper) 70%, transparent);
  color: var(--ink);
  border-radius: 999px;
  padding: 0.4rem 0.75rem 0.4rem 0.5rem;
  font: inherit;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.theme-mark {
  width: 0.85rem;
  height: 0.85rem;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #ffe9b8, #c9842a);
}

[data-theme="ink"] .theme-mark {
  background: #d4a45a;
  box-shadow: inset -0.22rem 0 0 0 var(--paper);
}

h1 {
  margin: 0.35rem 0 0;
  font-family: var(--serif);
  font-size: clamp(2.5rem, 7vw, 4.4rem);
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 0.92;
}

.lede {
  margin: 0.85rem 0 0;
  max-width: 42rem;
  color: var(--muted);
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.12rem;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.45rem;
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

[hidden] {
  display: none !important;
}

.panel-title,
.subhead {
  margin: 0 0 0.75rem;
  font-family: var(--serif);
  font-weight: 500;
}

.panel-title {
  font-size: 1.4rem;
  color: var(--sea);
}

.subhead {
  font-size: 1.05rem;
  margin-top: 1.3rem;
}

.copy {
  margin: 0 0 1rem;
}

.copy.quiet,
.kbd-hint,
.note,
.pattern {
  color: var(--muted);
}

.choice-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0.7rem;
}

.choice-grid-compact {
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
}

.choice,
.chip,
.letter,
.option {
  appearance: none;
  background: color-mix(in srgb, var(--paper) 78%, transparent);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 14px;
  cursor: pointer;
  font: inherit;
  text-align: left;
  transition: border-color 0.15s ease, transform 0.15s ease, background 0.15s ease;
}

.choice {
  min-height: 108px;
  padding: 0.9rem 0.85rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.2rem;
}

.choice:hover,
.chip:hover,
.letter:hover,
.option:hover,
.cell:hover {
  border-color: var(--line-strong);
  transform: translateY(-1px);
}

.choice[aria-pressed="true"],
.chip[aria-pressed="true"],
.letter[aria-pressed="true"] {
  border-color: var(--sea);
  background: color-mix(in srgb, var(--sea) 14%, var(--paper));
}

.choice-label {
  font-size: 0.86rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 700;
}

.choice-blurb {
  color: var(--muted);
  font-size: 0.82rem;
}

.btn {
  appearance: none;
  border: 1px solid transparent;
  border-radius: 999px;
  font: inherit;
  font-weight: 700;
  letter-spacing: 0.04em;
  cursor: pointer;
  padding: 0.8rem 1.25rem;
}

.btn.primary {
  background: var(--sea);
  color: #f7fbff;
}

.btn.primary:hover {
  filter: brightness(1.06);
}

.btn.ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}

.btn.ghost:hover {
  border-color: var(--line-strong);
}

.atlas-wrap {
  overflow-x: auto;
  margin: 0.4rem 0 0.2rem;
}

.atlas {
  width: 100%;
  min-width: 560px;
  border-collapse: separate;
  border-spacing: 0.45rem;
}

.atlas th,
.atlas .row-label {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 700;
  text-align: center;
}

.atlas .row-label {
  text-align: right;
  white-space: nowrap;
  padding-right: 0.2rem;
  width: 6.5rem;
}

.cell {
  appearance: none;
  width: 100%;
  min-height: 5.4rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--paper);
  color: inherit;
  font: inherit;
  cursor: pointer;
  padding: 0.7rem 0.75rem;
  text-align: left;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 0.35rem;
}

.cell[data-time="past"] { background: var(--cell-past); }
.cell[data-time="present"] { background: var(--cell-present); }
.cell[data-time="future"] { background: var(--cell-future); }

.cell-label {
  font-weight: 700;
  font-size: 0.92rem;
}

.cell-phrase {
  font-family: var(--serif);
  font-style: italic;
  color: var(--muted);
  font-size: 0.92rem;
}

.cell.is-selected,
.cell[aria-pressed="true"] {
  border-color: var(--sea);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--sea) 50%, transparent);
}

.cell.is-correct {
  border-color: var(--ok);
  background: color-mix(in srgb, var(--ok) 16%, var(--paper));
}

.cell.is-wrong {
  border-color: var(--bad);
  background: color-mix(in srgb, var(--bad) 14%, var(--paper));
}

.cell.is-unusual .cell-phrase {
  opacity: 0.7;
}

.atlas.compact .cell {
  min-height: 4.4rem;
}

.study {
  margin-top: 1rem;
  padding: 1rem 1.05rem;
  border: 1px dashed var(--line-strong);
  border-radius: 16px;
  background: color-mix(in srgb, var(--paper) 70%, transparent);
}

.study h3 {
  margin: 0 0 0.35rem;
  font-family: var(--serif);
  font-size: 1.35rem;
}

.study .pattern-line {
  margin: 0 0 0.8rem;
  color: var(--sea);
  font-weight: 700;
}

.study ul {
  margin: 0.2rem 0 0.8rem;
  padding-left: 1.1rem;
}

.signals {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0 0 0.8rem;
  padding: 0;
  list-style: none;
}

.signals li,
.chip,
.letter {
  padding: 0.28rem 0.65rem;
  border-radius: 999px;
  font-size: 0.82rem;
}

.signals li {
  border: 1px solid var(--line);
  background: var(--paper);
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--muted);
}

.field input,
.field select,
#answer-input {
  font: inherit;
  text-transform: none;
  letter-spacing: 0;
  font-weight: 500;
  color: var(--ink);
  background: var(--input);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.7rem 0.8rem;
  min-width: 12rem;
}

.letter-row,
.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: 0.8rem 0;
}

.letter {
  min-width: 2.1rem;
  text-align: center;
  font-weight: 700;
}

.chip {
  font-size: 0.86rem;
}

.stats,
.summary-grid,
.records {
  list-style: none;
  margin: 0;
  padding: 0;
}

.stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1.2rem;
}

.stats li,
.summary-grid li,
.records li {
  display: flex;
  flex-direction: column;
}

.stats span,
.summary-grid span,
.records span {
  color: var(--muted);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 700;
}

.stats strong,
.summary-grid strong {
  font-family: var(--serif);
  font-size: 1.25rem;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 0.8rem;
  margin-bottom: 1.2rem;
}

.prompt-kicker {
  margin: 0.6rem 0 0;
  color: var(--brass);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 0.72rem;
  font-weight: 700;
}

.prompt {
  margin: 0.25rem 0 0.8rem;
  font-family: var(--serif);
  font-size: 1.35rem;
}

.sentence,
.blank {
  margin: 0 0 1rem;
  padding: 1rem 1.1rem;
  background: var(--paper);
  border-left: 4px solid var(--sea);
  border-radius: 12px;
  font-family: var(--serif);
  font-size: 1.25rem;
}

.options {
  display: grid;
  gap: 0.6rem;
  margin-bottom: 1rem;
}

.option {
  padding: 0.85rem 1rem;
  font-family: var(--serif);
  font-size: 1.05rem;
}

.option.is-correct {
  border-color: var(--ok);
  background: color-mix(in srgb, var(--ok) 16%, var(--paper));
}

.option.is-wrong {
  border-color: var(--bad);
  background: color-mix(in srgb, var(--bad) 14%, var(--paper));
}

.answer-row {
  margin-bottom: 0.8rem;
}

#answer-input {
  flex: 1;
  min-width: min(100%, 16rem);
}

.feedback {
  margin: 0 0 0.8rem;
  padding: 0.8rem 1rem;
  border-radius: 12px;
  font-weight: 600;
}

.feedback.is-ok {
  background: color-mix(in srgb, var(--ok) 16%, var(--paper));
  color: var(--ok);
}

.feedback.is-bad {
  background: color-mix(in srgb, var(--bad) 14%, var(--paper));
  color: var(--bad);
}

.review {
  display: grid;
  gap: 0.55rem;
  margin-bottom: 1.2rem;
}

.review-item {
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--paper);
}

.review-item strong {
  display: block;
  margin-bottom: 0.2rem;
}

.kbd-hint {
  margin: 1rem 0 0;
  font-size: 0.85rem;
}

.site-footer {
  margin-top: 1.4rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer a {
  color: var(--sea);
}

.overlay {
  position: fixed;
  inset: 0;
  z-index: 10;
  background: rgba(20, 16, 10, 0.42);
  display: grid;
  place-items: center;
  padding: 1rem;
}

.overlay[hidden] {
  display: none;
}

.overlay-card {
  width: min(28rem, 100%);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 1.3rem;
  box-shadow: var(--shadow);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

@media (max-width: 720px) {
  .atlas,
  .atlas.compact {
    min-width: 480px;
  }

  .choice,
  .cell {
    min-height: 0;
  }

  h1 {
    font-size: 2.4rem;
  }
}