:root {
  --bg: #f5f3ee;
  --surface: #ffffff;
  --ink: #17263d;
  --muted: #5a6a7f;
  --line: #e1e3e0;
  --focus: #2f6fd6;
  --good: #1b7f53;
  --bad: #c24339;
  --link: #2f74a1;
  --accent: #f1b545;
  /* Low-to-high ramp, teal to blue, shared by rank chips, rows and the logo. */
  --ramp-1: #9fdccf;
  --ramp-2: #62c0b8;
  --ramp-3: #3fa3b5;
  --ramp-4: #327cac;
  --ramp-5: #2e5c9e;
  --on-ramp-light: #0f2a33;
  --on-ramp-dark: #ffffff;
  --row-tint: 12%;
  --radius: 14px;
  --shadow: 0 1px 2px rgb(23 38 61 / 6%), 0 4px 14px rgb(23 38 61 / 6%);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1726;
    --surface: #172235;
    --ink: #eef2f7;
    --muted: #a3b2c5;
    --line: #26344b;
    --focus: #7aa7f0;
    --good: #52c48c;
    --bad: #f07b6e;
    --link: #8cc0ec;
    --row-tint: 18%;
    --shadow: 0 1px 2px rgb(0 0 0 / 35%);
    color-scheme: dark;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.45 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

button {
  font: inherit;
  color: inherit;
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.masthead,
main,
.colophon {
  width: min(100% - 32px, 480px);
  margin-inline: auto;
}

/* Header */
.masthead {
  display: grid;
  grid-template-columns: 40px 1fr 40px;
  align-items: center;
  padding-top: 22px;
  text-align: center;
}

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

.brand-mark {
  width: 28px;
  height: 28px;
}

.brand-mark .r1 { fill: var(--ramp-1); }
.brand-mark .r2 { fill: var(--ramp-2); }
.brand-mark .r3 { fill: var(--ramp-3); }
.brand-mark .r4 { fill: var(--ramp-4); }
.brand-mark .r5 { fill: var(--ramp-5); }

h1 {
  margin: 0;
  font-size: 1.9rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.tagline {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.icon-button {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--surface);
  font-weight: 800;
  cursor: pointer;
}

.icon-button svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.4;
  stroke-linecap: round;
}

main {
  padding: 18px 0 8px;
}

.loading {
  text-align: center;
  color: var(--muted);
}

/* Puzzle header */
.meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.meta .dot {
  margin-inline: 2px;
}

.nav-step {
  width: 30px;
  height: 30px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--surface);
  cursor: pointer;
  line-height: 1;
}

.nav-step:disabled {
  opacity: 0.3;
  cursor: default;
}

.back-today {
  margin: 6px 0 0;
  text-align: center;
}

.link {
  border: 0;
  background: none;
  color: var(--link);
  font-size: 0.85rem;
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
}

.prompt {
  margin: 12px 0 6px;
  text-align: center;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.category-chip {
  width: fit-content;
  margin: 0 auto 14px;
  padding: 3px 12px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--ramp-2) 22%, var(--surface));
  color: var(--ink);
  font-size: 0.8rem;
  font-weight: 700;
}

/* The ordered list: ranks 1-5, a low-to-high cue, and a subtle ramp. */
.ladder {
  display: grid;
  gap: 6px;
}

.end {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding-left: 14px;
}

.end:first-child::before { content: "▲ "; font-size: 0.6rem; }
.end:last-child::before { content: "▼ "; font-size: 0.6rem; }

.rows {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.row {
  --ramp: var(--ramp-1);
  --on-ramp: var(--on-ramp-light);
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 52px;
  padding: 8px 14px 8px 8px;
  border: 1px solid var(--line);
  border-left: 5px solid var(--ramp);
  border-radius: var(--radius);
  background: linear-gradient(90deg, color-mix(in srgb, var(--ramp) var(--row-tint), var(--surface)), var(--surface) 70%);
  box-shadow: var(--shadow);
}

.row:nth-child(2) { --ramp: var(--ramp-2); }
.row:nth-child(3) { --ramp: var(--ramp-3); }
.row:nth-child(4) { --ramp: var(--ramp-4); --on-ramp: var(--on-ramp-dark); }
.row:nth-child(5) { --ramp: var(--ramp-5); --on-ramp: var(--on-ramp-dark); }

.rank {
  display: grid;
  place-items: center;
  flex: none;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--ramp);
  color: var(--on-ramp);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}

.name {
  flex: 1;
  min-width: 0;
  /* Long single-word names hyphenate properly rather than splitting anywhere. */
  hyphens: auto;
  overflow-wrap: break-word;
  font-weight: 650;
  font-size: 1.05rem;
}

.name a {
  text-decoration-color: color-mix(in srgb, currentColor 35%, transparent);
  text-underline-offset: 3px;
}

.value {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  font-variant-numeric: tabular-nums;
  font-weight: 650;
  text-align: right;
  white-space: nowrap; /* long names wrap instead of the value */
  font-size: 0.95rem;
  animation: reveal 320ms ease-out both;
  animation-delay: calc(var(--step) * 60ms);
}

.off-rank {
  color: var(--bad);
  font-size: 0.78rem;
  font-weight: 700;
}

@keyframes reveal {
  from { opacity: 0; transform: translateX(6px); }
}

.view-caption {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
}

.view-caption strong {
  color: var(--ink);
}

/* Options */
/* Options: a single list of five, echoing the ranked rows above. */
.options {
  display: grid;
  gap: 8px;
  margin-top: 22px;
}

.options-label {
  margin: 0 0 2px;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 700;
}

.option {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 50px;
  padding: 10px 16px;
  border: 1.5px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  font-weight: 650;
  font-size: 1rem;
  text-align: left;
  cursor: pointer;
  transition: border-color 120ms, background 120ms, transform 120ms;
}

.option:hover {
  border-color: color-mix(in srgb, var(--ink) 30%, var(--line));
}

.option:active {
  transform: scale(0.98);
}

.option.is-selected {
  border-color: var(--ink);
  background: color-mix(in srgb, var(--accent) 22%, var(--surface));
}

.option.is-struck {
  color: var(--muted);
  text-decoration: line-through;
  text-decoration-color: var(--bad);
  border-style: dashed;
  cursor: not-allowed;
  opacity: 0.7;
}

.option .mark {
  color: var(--bad);
}

.option.is-answer .mark {
  color: var(--good);
}

.actions {
  display: flex;
  justify-content: center;
  margin-top: 16px;
}

.lock,
.share,
.primary {
  min-width: 150px;
  min-height: 48px;
  padding: 10px 22px;
  border: 0;
  border-radius: 999px;
  background: var(--ink);
  color: var(--bg);
  font-weight: 750;
  cursor: pointer;
}

.secondary {
  min-height: 48px;
  padding: 10px 20px;
  border: 1.5px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  font-weight: 700;
  cursor: pointer;
}

.lock:disabled {
  opacity: 0.3;
  cursor: default;
}

.tries {
  margin: 14px 0 0;
  text-align: center;
  font-size: 1.2rem;
  letter-spacing: 0.15em;
}

.feedback {
  min-height: 1.5em;
  margin: 6px 0 0;
  text-align: center;
  color: var(--bad);
  font-weight: 650;
}

/* Result */
.result {
  margin-top: 20px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  text-align: center;
}

.result:focus {
  outline: none;
}

.verdict {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 800;
}

.answer {
  margin: 4px 0 0;
  color: var(--muted);
}

.answer strong {
  color: var(--ink);
}

.result .tries {
  margin: 10px 0 14px;
}

.result-actions {
  display: flex;
  justify-content: center;
  gap: 10px;
}

.countdown {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.clock {
  color: var(--ink);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.colophon {
  padding: 24px 0 32px;
  color: var(--muted);
  font-size: 0.8rem;
  text-align: center;
}

/* Dialogs */
dialog {
  width: min(100% - 32px, 420px);
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface);
  color: var(--ink);
  box-shadow: 0 20px 60px rgb(0 0 0 / 25%);
}

dialog::backdrop {
  background: rgb(15 23 38 / 45%);
}

dialog h2 {
  margin: 0 0 10px;
  font-size: 1.25rem;
}

dialog h3 {
  margin: 18px 0 8px;
  font-size: 0.9rem;
  color: var(--muted);
}

dialog ul {
  padding-left: 20px;
}

dialog li {
  margin: 4px 0;
}

dialog .primary {
  display: block;
  margin: 16px auto 0;
}

.close {
  float: right;
  width: 32px;
  height: 32px;
  border: 0;
  border-radius: 50%;
  background: none;
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
}

.help-demo {
  display: grid;
  gap: 6px;
  margin: 12px 0 4px;
  padding: 0;
  list-style: none;
  font-weight: 650;
}

.help-demo li {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
}

.help-demo .rank {
  width: 26px;
  height: 26px;
  border-radius: 8px;
  font-size: 0.85rem;
}

.help-demo li:nth-child(1) .rank { background: var(--ramp-1); color: var(--on-ramp-light); }
.help-demo li:nth-child(2) .rank { background: var(--ramp-3); color: var(--on-ramp-light); }
.help-demo li:nth-child(3) .rank { background: var(--ramp-5); color: var(--on-ramp-dark); }

.help-hint {
  margin-top: 0;
  color: var(--muted);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  text-align: center;
}

.stat strong {
  display: block;
  font-size: 1.5rem;
  font-variant-numeric: tabular-nums;
}

.stat span {
  color: var(--muted);
  font-size: 0.75rem;
}

.distribution {
  display: grid;
  gap: 5px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.distribution li {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
}

.bar-label {
  width: 12px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.bar {
  flex: 1;
}

.bar span {
  display: block;
  width: max(28px, calc(var(--share) * 100%));
  padding: 2px 8px;
  border-radius: 6px;
  background: color-mix(in srgb, var(--ramp-3) 35%, var(--surface));
  font-size: 0.8rem;
  font-weight: 700;
  text-align: right;
}

.distribution .is-today .bar span {
  background: var(--ramp-4);
  color: #fff;
}

.stats-note {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 0.85rem;
}

@media (prefers-reduced-motion: reduce) {
  .value { animation: none; }
  .option { transition: none; }
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}