/* ============================================================
   Channel — take-home for Science Corporation
   Editorial scientific paper register.
   Cream paper · ink · single marigold accent · dark plate inset.

   v0.3 redesign — refero references: Typeform, Symbolic.ai,
   Christopher Ireland, Operate, Integrated Biosciences.
   See DESIGN.md for the design system spec.
   ============================================================ */

/* ===== HUBOT SANS · GitHub's open-source variable sans ===== */
/* Falls back gracefully to SF Pro / system-ui if the CDN is unreachable. */
@font-face {
  font-family: 'Hubot Sans';
  src: url('https://cdn.jsdelivr.net/npm/@github/hubot-sans@1.0.1/dist/Hubot-Sans.woff2') format('woff2-variations'),
       url('https://cdn.jsdelivr.net/npm/@github/hubot-sans@1.0.1/dist/Hubot-Sans.woff2') format('woff2');
  font-weight: 200 900;
  font-display: swap;
}

:root {
  /* COLOR TOKENS — OKLCH cream-paper editorial register */
  --paper-bg:        oklch(90.8% 0.045 82);
  --paper-raised:    oklch(88.8% 0.044 82);
  --paper-card:      oklch(94.0% 0.032 82);

  --ink-primary:     oklch(20% 0.025 280);
  --ink-secondary:   oklch(40% 0.020 280);
  --ink-quiet:       oklch(58% 0.015 280);
  --ink-line:        oklch(20% 0.025 280 / 0.10);
  --ink-line-strong: oklch(20% 0.025 280 / 0.22);

  --accent:          oklch(70% 0.165 75);
  --accent-soft:     oklch(88% 0.08 75);
  --accent-line:     oklch(70% 0.165 75 / 0.40);
  --accent-glow:     oklch(70% 0.165 75 / 0.45);

  --plate-bg:        oklch(28% 0.030 280);
  --plate-raised:    oklch(32% 0.030 280);
  --plate-line:      oklch(70% 0.020 280 / 0.12);
  --plate-text-dim:  oklch(50% 0.020 280);
  --plate-text:      oklch(82% 0.018 80);
  --plate-target:    oklch(82% 0.18 75);

  --error:           oklch(50% 0.165 28);
  --error-soft:      oklch(50% 0.165 28 / 0.25);

  /* TYPOGRAPHY */
  --font-serif: 'Source Serif 4', 'Charter', 'Iowan Old Style', 'Apple Garamond', 'Palatino', Georgia, serif;
  --font-sans:  'Hubot Sans', -apple-system, BlinkMacSystemFont, 'SF Pro Display', system-ui, sans-serif;

  /* SPACING */
  --s-2xs: 4px;
  --s-xs:  8px;
  --s-sm:  12px;
  --s-md:  16px;
  --s-lg:  24px;
  --s-xl:  40px;
  --s-2xl: 64px;
  --s-3xl: 96px;

  /* MOTION */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);
  --dur-fast: 180ms;
  --dur-base: 260ms;
  --dur-slow: 420ms;
  --dur-entrance: 640ms;

  /* KEYBOARD SIZING — clamp tightened so the plate fits a 360px-wide
     viewport without horizontal overflow. 14×14.75 + 13×1 = 219px,
     plus plate padding ~30px, well under 360px. */
  --key-size: clamp(14px, 3.2vw, 38px);
  --key-gap:  clamp(1px, 0.4vw, 5px);

  color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { font-size: 16px; }
body {
  background:
    radial-gradient(circle at 16% 18%, oklch(96% 0.034 82 / 0.48), transparent 34%),
    linear-gradient(180deg, oklch(92.5% 0.044 82), var(--paper-bg));
  color: var(--ink-primary);
  font-family: var(--font-sans);
  font-weight: 400;
  line-height: 1.55;
  font-feature-settings: 'kern' 1, 'tnum' 1;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  min-height: 100dvh;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.18;
  background-image:
    linear-gradient(90deg, oklch(20% 0.025 280 / 0.025) 1px, transparent 1px),
    linear-gradient(180deg, oklch(20% 0.025 280 / 0.020) 1px, transparent 1px);
  background-size: 48px 48px, 48px 48px;
  mix-blend-mode: multiply;
}
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; padding: 0; }
ul, ol, dl, dd, dt { padding: 0; margin: 0; list-style: none; }
sub { font-size: 0.65em; vertical-align: baseline; position: relative; bottom: -0.22em; font-style: italic; }
hr { border: 0; }

/* ============================================================
   PAGE LAYOUT
   ============================================================ */

.page {
  position: relative;
  min-height: 100dvh;
}

#app {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--s-md) var(--s-md);
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}
@media (min-width: 600px) {
  #app { padding: var(--s-lg) var(--s-lg); }
}
@media (min-width: 900px) {
  #app { padding: var(--s-xl) var(--s-2xl); }
}
@media (min-width: 1200px) {
  #app { padding: var(--s-2xl) var(--s-3xl); }
}

.screen { display: none; }
#app[data-screen="title"]       .screen-title       { display: flex; flex-direction: column; justify-content: center; min-height: 88dvh; }
#app[data-screen="calibration"] .screen-calibration { display: flex; flex-direction: column; gap: clamp(14px, 2.5vw, 22px); }
#app[data-screen="game"]        .screen-game        { display: flex; flex-direction: column; gap: var(--s-md); min-height: 92dvh; }
#app[data-screen="results"]     .screen-results     { display: flex; flex-direction: column; gap: var(--s-lg); }

#app [data-during] { display: none; }
#app[data-screen="game"][data-mode="practice"] [data-during="practice"] { display: inline-flex; }
#app[data-screen="game"][data-mode="eval"] [data-during="eval"] { display: inline-flex; }

/* ============================================================
   TYPOGRAPHY UTILITIES
   ============================================================ */

.wordmark {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 17px;
  letter-spacing: -0.01em;
  color: var(--ink-primary);
  font-style: italic;
}
.wordmark-sm { font-size: 15px; }

.meta {
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-quiet);
}

.section-eyebrow {
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-quiet);
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: var(--s-xs);
}

.rule {
  width: 100%;
  height: 1px;
  background: var(--ink-line-strong);
  margin: 0;
}
.rule-result {
  height: 1px;
  background: var(--ink-line);
}

/* ============================================================
   TITLE SCREEN
   ============================================================ */

.title-mark {
  display: flex;
  flex-direction: column;
  gap: var(--s-2xs);
  align-items: flex-start;
}

.title-grid {
  display: grid;
  grid-template-columns: minmax(0, 760px);
  gap: var(--s-xl);
  align-items: end;
  justify-content: center;
  width: 100%;
}

.title-copy {
  display: flex;
  flex-direction: column;
  gap: var(--s-lg);
  align-items: center;
  text-align: center;
  min-width: 0;
}

.hero {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(88px, 15vw, 210px);
  line-height: 0.84;
  letter-spacing: -0.055em;
  color: var(--ink-primary);
  font-feature-settings: 'kern' 1, 'liga' 1;
  filter: blur(8px);
  opacity: 0;
  transform: translateY(20px);
  animation: blur-in var(--dur-entrance) var(--ease-out) 120ms forwards;
}

@keyframes blur-in {
  to {
    filter: blur(0);
    opacity: 1;
    transform: translateY(0);
  }
}

.formula {
  display: block;
  font-family: var(--font-serif);
  font-feature-settings: 'tnum' 1, 'kern' 1;
  font-size: clamp(18px, 1.8vw, 24px);
  font-weight: 400;
  color: var(--ink-secondary);
  letter-spacing: 0;
  font-style: italic;
  padding: 0;
  margin: 0;
  max-width: 58ch;
  opacity: 0;
  animation: fade-up var(--dur-entrance) var(--ease-out) 520ms forwards;
}

.formula math {
  font-family: var(--font-serif);
}

.title-subtitle {
  max-width: 42ch;
  margin: 0;
  font-size: clamp(18px, 2.4vw, 28px);
  line-height: 1.35;
  color: var(--ink-secondary);
  opacity: 0;
  animation: fade-up var(--dur-entrance) var(--ease-out) 620ms forwards;
}

@media (max-width: 780px) {
  .title-grid {
    grid-template-columns: 1fr;
    gap: var(--s-xl);
  }
}

@media (max-width: 560px) {
  .hero {
    font-size: clamp(76px, 24vw, 116px);
  }

}

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

@keyframes soft-rise {
  from {
    opacity: 0;
    filter: blur(6px);
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    filter: blur(0);
    transform: translateY(0);
  }
}

@keyframes plate-rise {
  from {
    opacity: 0;
    transform: translateY(18px) scale(0.985);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.title-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-md);
  justify-content: center;
  opacity: 0;
  animation: fade-up var(--dur-entrance) var(--ease-out) 720ms forwards;
}

.start-choice {
  display: grid;
  gap: var(--s-sm);
  justify-items: center;
  margin-top: calc(var(--s-sm) * -1);
  padding: var(--s-md);
  border-radius: 20px;
  background:
    linear-gradient(180deg, oklch(96.2% 0.030 82 / 0.88), oklch(93.4% 0.036 82 / 0.78));
  box-shadow:
    inset 0 1px 0 oklch(100% 0 0 / 0.28),
    inset 0 0 0 1px oklch(20% 0.025 280 / 0.065),
    0 18px 44px -38px oklch(20% 0.04 280 / 0.28);
  opacity: 0;
  animation: soft-rise 360ms var(--ease-out) forwards;
}

.start-choice[hidden] {
  display: none;
}

.start-choice p {
  margin: 0;
  color: var(--ink-secondary);
  font-size: 14px;
}

.start-choice-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--s-sm);
}

.start-methods {
  display: grid;
  gap: var(--s-xs);
  width: min(100%, 420px);
}

.start-method {
  display: grid;
  gap: 2px;
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--ink-line);
  border-radius: 14px;
  background: oklch(96% 0.025 82 / 0.54);
  text-align: left;
  transition:
    border-color var(--dur-fast) var(--ease-out),
    transform var(--dur-fast) var(--ease-out),
    background-color var(--dur-fast) var(--ease-out);
}

.start-method:hover {
  border-color: var(--ink-line-strong);
  background: oklch(97% 0.025 82 / 0.72);
}

.start-method:active { transform: scale(0.992); }
.start-method:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.start-method strong {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-primary);
}

.start-method span {
  font-size: 12px;
  color: var(--ink-secondary);
}

.title-foot {
  display: flex;
  align-items: flex-end;
}

.soft-keyboard-input {
  position: fixed;
  left: 50%;
  bottom: 0;
  width: 1px;
  height: 1px;
  font-size: 16px;
  opacity: 0.01;
  border: 0;
  padding: 0;
  background: transparent;
  color: transparent;
  caret-color: transparent;
  pointer-events: none;
}

/* ============================================================
   BUTTONS
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-xs);
  padding: 13px 24px;
  min-height: 44px;          /* touch-target minimum (Apple HIG / WCAG) */
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--ink-primary);
  border-radius: 999px;
  border: 1px solid var(--ink-line-strong);
  background: var(--paper-card);
  transition:
    border-color var(--dur-fast) var(--ease-out),
    transform var(--dur-fast) var(--ease-out),
    background-color var(--dur-fast) var(--ease-out),
    color var(--dur-fast) var(--ease-out);
  white-space: nowrap;
}
.btn:hover { border-color: var(--ink-primary); }
.btn:active { transform: scale(0.985); }
.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.btn:disabled {
  cursor: not-allowed;
  opacity: 0.42;
}

.btn-primary {
  background: var(--ink-primary);
  border-color: var(--ink-primary);
  color: var(--paper-bg);
}
.btn-primary:hover {
  background: oklch(26% 0.04 280);
  border-color: oklch(26% 0.04 280);
}

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

.btn-sm {
  padding: 8px 14px;
  min-height: 36px;
  font-size: 12px;
  letter-spacing: 0.03em;
}

.btn-hero {
  min-height: 58px;
  padding: 17px 34px;
  font-size: 18px;
}

/* ============================================================
   CALIBRATION SCREEN
   ============================================================ */

.screen-calibration {
  width: 100%;
  max-width: 540px;
  margin: 0 auto;
  align-self: center;
  justify-content: center;
  min-height: auto;
  padding: clamp(22px, 3vw, 32px) clamp(24px, 5vw, 44px);
  border-radius: 22px;
  background:
    linear-gradient(180deg, oklch(96.2% 0.030 82 / 0.92), oklch(93.4% 0.036 82 / 0.88));
  box-shadow:
    inset 0 1px 0 oklch(100% 0 0 / 0.32),
    inset 0 0 0 1px oklch(20% 0.025 280 / 0.075),
    0 18px 44px -34px oklch(20% 0.04 280 / 0.34),
    0 1px 2px oklch(20% 0.04 280 / 0.04);
}

#app[data-screen="calibration"] .title-mark {
  align-items: center;
  opacity: 0;
  animation: soft-rise 520ms var(--ease-out) 40ms forwards;
}

.screen-calibration .meta,
.screen-calibration .section-eyebrow {
  letter-spacing: 0.04em;
  text-transform: lowercase;
}

.calibration-copy {
  max-width: 520px;
  margin: 0 auto;
  text-align: center;
  opacity: 0;
  animation: soft-rise 560ms var(--ease-out) 120ms forwards;
}

.calibration-copy h2 {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(42px, 6vw, 60px);
  line-height: 0.94;
  letter-spacing: -0.05em;
  text-transform: lowercase;
}

.calibration-copy p {
  max-width: 40ch;
  margin: var(--s-xs) auto 0;
  color: var(--ink-secondary);
  font-size: clamp(14px, 1.4vw, 16px);
  line-height: 1.45;
}

.calibration-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--s-xs);
  width: 100%;
  max-width: 380px;
  margin: 0 auto;
  opacity: 0;
  animation: soft-rise 560ms var(--ease-out) 180ms forwards;
}

.calibration-steps li {
  display: grid;
  gap: 1px;
  color: var(--ink-quiet);
  font-size: 12px;
  line-height: 1.2;
}

.calibration-steps span {
  width: 20px;
  height: 20px;
  display: grid;
  place-items: center;
  margin: 0 auto 6px;
  border: 1px solid oklch(20% 0.025 280 / 0.14);
  border-radius: 999px;
  color: var(--ink-quiet);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
}

.calibration-steps strong,
.calibration-steps em {
  display: block;
  text-align: center;
  font-style: normal;
  font-weight: 500;
}

.calibration-steps em {
  color: oklch(58% 0.015 280 / 0.72);
  font-size: 11px;
}

.calibration-step--active {
  color: var(--ink-primary);
}

.calibration-step--active span {
  border-color: var(--ink-primary);
  color: var(--ink-primary);
}

.calibration-step--done span {
  border-color: oklch(20% 0.025 280 / 0.22);
  color: var(--ink-primary);
}

.mode-grid {
  display: flex;
  flex-direction: column;
  gap: var(--s-xs);
  width: 100%;
  max-width: 380px;
  margin: 0 auto;
  opacity: 0;
  animation: soft-rise 560ms var(--ease-out) 220ms forwards;
}

.mode-card {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: baseline;
  gap: var(--s-xs) var(--s-md);
  min-height: 0;
  padding: var(--s-xs) 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.mode-card + .mode-card {
  padding-left: 0;
}

.mode-card::before {
  content: none;
}

.mode-card p {
  grid-column: 1;
  min-height: 0;
  margin: 0;
  color: var(--ink-secondary);
  font-size: 13px;
  line-height: 1.5;
}

.mode-card code {
  font-family: var(--font-sans);
  font-size: 0.95em;
  color: var(--ink-primary);
}

.mode-result {
  display: block;
  grid-column: 2;
  grid-row: 1;
  margin-top: 0;
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-quiet);
}

.mode-card .btn {
  grid-column: 2;
  grid-row: 2;
  justify-self: end;
  min-height: 30px;
}

.mode-card--recommended {
  color: var(--ink-primary);
}

.mode-card--recommended .section-eyebrow {
  color: var(--ink-primary);
}

.mode-card--recommended .mode-result {
  color: var(--ink-primary);
}

.mode-card--recommended::before {
  content: none;
}

.calibration-recommendation {
  max-width: 520px;
  margin: 0 auto;
  text-align: center;
  padding-top: 0;
  font-family: var(--font-serif);
  font-size: clamp(30px, 4.5vw, 48px);
  line-height: 1.05;
  letter-spacing: -0.025em;
  animation: soft-rise 420ms var(--ease-out) forwards;
}

.screen-calibration .result-actions {
  justify-content: center;
  gap: var(--s-sm);
  margin-top: calc(var(--s-xs) * -1);
}

.screen-calibration .btn {
  min-height: 42px;
  padding: 10px 20px;
  font-size: 14px;
}

@media (max-width: 560px) {
  .calibration-steps {
    grid-template-columns: 1fr;
    gap: var(--s-xs);
  }

  .calibration-steps li {
    grid-template-columns: 24px 1fr auto;
    align-items: center;
    gap: var(--s-xs);
  }

  .calibration-steps span {
    margin: 0;
  }

  .calibration-steps strong,
  .calibration-steps em {
    text-align: left;
  }

  .mode-grid {
    gap: var(--s-sm);
  }

  .mode-card,
  .mode-card + .mode-card {
    grid-template-columns: 1fr;
    padding: var(--s-sm) 0;
    border-left: 0;
  }

  .mode-result {
    grid-column: 1;
    grid-row: auto;
  }

  .mode-card .btn {
    grid-column: 1;
    grid-row: auto;
    justify-self: start;
  }
}

/* ============================================================
   GAME SCREEN
   ============================================================ */

.game-mark {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-md);
  opacity: 0;
  animation: soft-rise 420ms var(--ease-out) 20ms forwards;
}

.phase-pill {
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: var(--s-xs);
}
.phase-pill::before {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: var(--accent);
}

#app[data-mode="eval"] .phase-pill {
  color: var(--ink-primary);
}
#app[data-mode="eval"] .phase-pill::before { background: var(--ink-primary); }

.readout {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--s-md);
  padding-top: var(--s-xs);
  opacity: 0;
  animation: soft-rise 500ms var(--ease-out) 90ms forwards;
}

.readout-rate {
  display: inline-flex;
  align-items: baseline;
  gap: var(--s-xs);
}

.rate-display {
  font-family: var(--font-serif);
  font-feature-settings: 'tnum' 1;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(32px, 5.5vw, 72px);
  line-height: 0.95;
  letter-spacing: -0.025em;
  color: var(--ink-primary);
}

.rate-unit {
  font-family: var(--font-sans);
  font-size: clamp(14px, 1.4vw, 18px);
  font-weight: 500;
  color: var(--ink-quiet);
  letter-spacing: 0.04em;
}

.readout-meta {
  font-family: var(--font-sans);
  font-variant-numeric: tabular-nums;
  font-size: clamp(14px, 1.6vw, 18px);
  color: var(--ink-quiet);
}
.readout-meta .meta {
  font-family: var(--font-sans);
  font-variant-numeric: tabular-nums;
  font-size: inherit;
  letter-spacing: 0.04em;
  text-transform: none;
}
.readout-meta .value {
  font-family: var(--font-sans);
  font-variant-numeric: tabular-nums;
  font-weight: 500;
  color: var(--ink-primary);
}

/* Center the queue + plate in the remaining play area. The queue letters
   are the visual anchor — they tell the player what to do next. */
.play-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: clamp(16px, 3vw, 56px);
  min-height: 0;
  width: 100%;
  opacity: 0;
  animation: soft-rise 620ms var(--ease-out) 220ms forwards;
}

/* QUEUE STRIP — the visual anchor; centred above the keyboard plate */
.queue {
  display: flex;
  align-items: baseline;
  justify-content: center;
  flex-wrap: nowrap;
  gap: clamp(14px, 4.5vw, 80px);
  padding: 0;
  font-feature-settings: 'kern' 1;
  max-width: 100%;
}

.queue-char {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(48px, 11vw, 168px);
  line-height: 1;
  text-transform: lowercase;
  letter-spacing: -0.025em;
  transition: color var(--dur-fast) var(--ease-out),
              opacity var(--dur-fast) var(--ease-out),
              transform var(--dur-fast) var(--ease-out);
  font-style: italic;
}
.queue-char-special {
  font-family: var(--font-sans);
  font-weight: 600;
  font-style: normal !important;
  font-size: clamp(40px, 9vw, 140px);
}
.queue-char[data-position="0"] {
  color: var(--accent);
  font-style: normal;
}
.queue-char[data-position="1"] { color: var(--ink-primary);   opacity: 0.85; }
.queue-char[data-position="2"] { color: var(--ink-secondary); opacity: 0.55; }
.queue-char[data-position="3"] { color: var(--ink-quiet);     opacity: 0.35; }

#app[data-ready="true"] .queue {
  display: none;
}

.ready-panel {
  width: min(100%, 620px);
  text-align: center;
  display: grid;
  justify-items: center;
  gap: var(--s-xs);
  animation: soft-rise 360ms var(--ease-out) both;
}

.ready-panel[hidden] {
  display: none;
}

.ready-kicker {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: lowercase;
  color: var(--ink-quiet);
}

.ready-panel h2 {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(38px, 7vw, 84px);
  line-height: 0.95;
  letter-spacing: -0.04em;
  text-transform: lowercase;
}

.ready-panel p {
  max-width: 48ch;
  margin: 0;
  color: var(--ink-secondary);
  font-size: clamp(14px, 1.5vw, 18px);
  line-height: 1.45;
}

.ready-panel .btn {
  margin-top: var(--s-xs);
}

/* PLATE — the dark instrument panel set into the cream page */
.plate {
  background: var(--plate-bg);
  border-radius: 12px;
  padding: clamp(8px, 1.6vw, 18px);
  box-shadow:
    0 30px 50px -30px oklch(20% 0.04 280 / 0.30),
    0 1px 0 0 oklch(0% 0 0 / 0.08);
  position: relative;
  display: inline-block;
  max-width: 100%;
  overflow: hidden;
  transform-origin: 50% 100%;
  animation: plate-rise 620ms var(--ease-out) 300ms both;
}

.keyboard {
  display: flex;
  flex-direction: column;
  gap: var(--key-gap);
  align-items: center;
  user-select: none;
}

.keyboard-home {
  gap: var(--s-xs);
}

.keyboard-home .kb-row {
  gap: clamp(3px, 0.8vw, 8px);
}

.keyboard-home .key {
  --key-size: clamp(34px, 7vw, 54px);
}

.keyboard-home .key[data-key=" "] {
  min-width: clamp(92px, 18vw, 148px);
}

.keyboard-tap {
  width: min(82vw, 560px);
}

.tap-grid {
  display: grid;
  grid-template-columns: repeat(var(--tap-grid-size), minmax(0, 1fr));
  gap: clamp(6px, 1.4vw, 12px);
  width: 100%;
  aspect-ratio: 1;
}

.tap-cell {
  width: 100%;
  height: auto;
  min-height: 0;
  aspect-ratio: 1;
  border-radius: clamp(10px, 2vw, 18px);
  font-size: clamp(12px, 2.4vw, 18px);
  touch-action: manipulation;
}

.tap-cell:active {
  transform: scale(0.97);
}

.home-hand-guide {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(20px, 5vw, 72px);
  width: min(100%, 560px);
  margin-top: clamp(8px, 1.5vw, 14px);
  padding: 0 clamp(6px, 1.8vw, 18px) clamp(2px, 0.8vw, 8px);
}

.home-hand {
  display: grid;
  gap: 6px;
  justify-items: center;
  opacity: 0.78;
}

.home-fingers {
  display: flex;
  align-items: end;
  justify-content: center;
  gap: clamp(4px, 1vw, 8px);
}

.home-finger {
  width: clamp(16px, 3.2vw, 26px);
  height: clamp(44px, 7vw, 68px);
  display: grid;
  grid-template-rows: 1fr auto;
  justify-items: center;
  align-items: end;
  border-radius: 999px 999px 10px 10px;
  background: linear-gradient(180deg, oklch(42% 0.028 280), oklch(31% 0.028 280));
  box-shadow:
    inset 0 1px 0 oklch(100% 0 0 / 0.08),
    inset 0 0 0 1px oklch(70% 0.02 280 / 0.10);
  color: var(--plate-text-dim);
  transform-origin: 50% 100%;
  transition:
    transform 180ms var(--ease-out),
    color 180ms var(--ease-out),
    background-color 180ms var(--ease-out),
    box-shadow 180ms var(--ease-out);
}

.home-finger:nth-child(1),
.home-finger:nth-child(4) {
  height: clamp(38px, 6vw, 58px);
}

.home-finger:nth-child(2) {
  height: clamp(48px, 7.6vw, 74px);
}

.home-finger-tip {
  width: 38%;
  aspect-ratio: 1;
  margin-top: 7px;
  border-radius: 50%;
  background: oklch(70% 0.02 80 / 0.18);
}

.home-finger-key,
.home-thumb {
  font-size: clamp(8px, 1.4vw, 10px);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: lowercase;
}

.home-thumb {
  min-width: clamp(52px, 9vw, 72px);
  padding: 5px 10px 6px;
  border-radius: 999px;
  background: oklch(33% 0.028 280);
  box-shadow:
    inset 0 1px 0 oklch(100% 0 0 / 0.08),
    inset 0 0 0 1px oklch(70% 0.02 280 / 0.10);
  color: var(--plate-text-dim);
  text-align: center;
  transition:
    transform 180ms var(--ease-out),
    color 180ms var(--ease-out),
    background-color 180ms var(--ease-out),
    box-shadow 180ms var(--ease-out);
}

.home-finger--active {
  color: var(--plate-target);
  background: linear-gradient(180deg, oklch(48% 0.07 75), oklch(38% 0.055 75));
  transform: translateY(-3px);
  box-shadow:
    0 0 20px 3px oklch(70% 0.165 75 / 0.34),
    inset 0 0 12px oklch(70% 0.165 75 / 0.16),
    inset 0 0 0 1px var(--accent-line);
}

.kb-row {
  display: flex;
  gap: var(--key-gap);
  justify-content: center;
  flex-wrap: nowrap;
}

.key {
  --w: 1;
  width: calc(var(--key-size) * var(--w));
  height: var(--key-size);
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: calc(var(--key-size) * 0.18);
  border: 1px solid var(--plate-line);
  background: var(--plate-raised);
  color: var(--plate-text-dim);
  font-family: var(--font-sans);
  font-size: clamp(8px, calc(var(--key-size) * 0.4), 14px);
  font-weight: 500;
  text-transform: lowercase;
  position: relative;
  transition:
    transform var(--dur-fast) var(--ease-out),
    color var(--dur-fast) var(--ease-out),
    border-color var(--dur-fast) var(--ease-out),
    background-color var(--dur-fast) var(--ease-out),
    box-shadow var(--dur-fast) var(--ease-out);
}

.key-label { pointer-events: none; }

.key--in-alphabet { color: var(--plate-text); }

.key--queue-3 {
  color: var(--plate-text);
  background: oklch(34% 0.03 280);
}
.key--queue-2 {
  color: var(--plate-text);
  background: oklch(36% 0.035 280);
  border-color: oklch(70% 0.02 280 / 0.18);
}
.key--queue-1 {
  color: oklch(86% 0.04 80);
  background: oklch(38% 0.04 280);
  border-color: oklch(70% 0.05 80 / 0.28);
}
.key--target {
  color: var(--plate-target);
  background: oklch(40% 0.06 75);
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow:
    0 0 22px 4px var(--accent-glow),
    inset 0 0 14px oklch(70% 0.165 75 / 0.18);
  font-weight: 600;
  z-index: 2;
}

.key--error {
  color: oklch(86% 0.05 25) !important;
  background: var(--error-soft) !important;
  border-color: var(--error) !important;
  box-shadow: 0 0 14px 2px oklch(50% 0.165 28 / 0.30) !important;
}

.game-hud {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-md) var(--s-xl);
  padding-top: var(--s-xs);
  align-items: baseline;
  opacity: 0;
  animation: soft-rise 480ms var(--ease-out) 160ms forwards;
}

.hud-stat {
  display: inline-flex;
  align-items: baseline;
  gap: var(--s-xs);
}
.hud-stat-wide { gap: var(--s-xs); }
.hud-stat-action { margin-left: auto; }

.hud-label {
  font-family: var(--font-sans);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-quiet);
}

.hud-value {
  font-family: var(--font-sans);
  font-variant-numeric: tabular-nums;
  font-size: clamp(15px, 1.5vw, 19px);
  font-weight: 500;
  color: var(--ink-primary);
}

/* ============================================================
   RESULTS SCREEN
   ============================================================ */

.screen-results {
  gap: var(--s-2xl);
  padding-top: var(--s-2xl);
}

.result-hero {
  display: inline-flex;
  align-items: baseline;
  gap: var(--s-md);
}

.rate-display-xl {
  font-size: clamp(120px, 22vw, 280px);
  filter: blur(8px);
  opacity: 0;
  transform: translateY(20px);
  animation: blur-in 800ms var(--ease-out) 160ms forwards;
}

.rate-unit-xl {
  font-size: clamp(20px, 2.5vw, 32px);
}

.result-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--s-md);
  padding: var(--s-md) 0;
  border-top: 1px solid var(--ink-line);
  border-bottom: 1px solid var(--ink-line);
}

.stat-cell {
  display: flex;
  flex-direction: column;
  gap: var(--s-2xs);
}
.stat-cell dt { font: inherit; }
.stat-cell dd {
  font-family: var(--font-sans);
  font-variant-numeric: tabular-nums;
  font-weight: 500;
  font-size: 24px;
  color: var(--ink-primary);
}

.comparison-section {
  display: flex;
  flex-direction: column;
  gap: var(--s-md);
}

.result-detail-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(220px, 0.6fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: start;
}

@media (max-width: 820px) {
  .result-detail-grid {
    grid-template-columns: 1fr;
  }
}

.comparison {
  display: flex;
  flex-direction: column;
  gap: var(--s-xs);
}

/* Bars rendered as thin ink lines on a faint ruled background — Operate ledger feel */
.bar {
  display: grid;
  grid-template-columns: minmax(180px, 240px) 1fr 80px;
  gap: var(--s-md);
  align-items: center;
  padding: var(--s-xs) 0;
  font-family: var(--font-sans);
  font-size: 12px;
  color: var(--ink-secondary);
  border-bottom: 1px solid var(--ink-line);
}
.bar:last-child { border-bottom: 0; }

.bar-label {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: 11px;
  letter-spacing: 0.02em;
}

.bar-track {
  position: relative;
  height: 14px;
  border-bottom: 1px solid var(--ink-line-strong);
}

.bar-fill {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 2px;
  background: var(--ink-secondary);
  transform-origin: left;
  transform: scaleX(0);
  animation: fill-bar 600ms var(--ease-out) forwards;
}

.bar-value {
  font-family: var(--font-sans);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  font-weight: 500;
  text-align: right;
  color: var(--ink-primary);
}

.bar--you .bar-label { color: var(--accent); font-weight: 600; }
.bar--you .bar-fill {
  background: var(--accent);
  height: 3px;
  box-shadow: 0 0 12px var(--accent-glow);
}
.bar--you .bar-value { color: var(--accent); font-weight: 600; }

@keyframes fill-bar { to { transform: scaleX(1); } }

.result-actions {
  display: flex;
  gap: var(--s-md);
  flex-wrap: wrap;
}

/* ============================================================
   DEV PANEL — test harness
   ============================================================ */

.dev-panel {
  position: fixed;
  top: var(--s-md);
  right: var(--s-md);
  width: min(360px, 90vw);
  max-height: calc(100dvh - var(--s-xl));
  overflow-y: auto;
  padding: var(--s-md);
  border: 1px solid var(--ink-line-strong);
  border-radius: 14px;
  background: var(--paper-card);
  box-shadow:
    0 24px 48px -20px oklch(20% 0.04 280 / 0.18),
    0 1px 0 0 var(--ink-line);
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: var(--s-md);
}
.dev-panel[hidden] { display: none; }

.dev-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.dev-section {
  border: 0;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--s-xs);
}

.dev-buttons { display: flex; flex-wrap: wrap; gap: 6px; }
.dev-buttons .btn { padding: 4px 10px; font-size: 10px; }
.dev-buttons .btn--active {
  background: var(--ink-primary);
  color: var(--paper-bg);
  border-color: var(--ink-primary);
}

.dev-history {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-family: var(--font-sans);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  color: var(--ink-secondary);
  max-height: 180px;
  overflow-y: auto;
}
.dev-history li {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--s-xs);
  padding: 4px 0;
  border-bottom: 1px solid var(--ink-line);
}
.dev-history li:last-child { border-bottom: 0; }
.dev-history .history-rate { color: var(--ink-primary); font-weight: 600; text-align: right; }

.dev-actions { display: flex; gap: var(--s-xs); }

.dev-output {
  font-family: ui-monospace, Menlo, monospace;
  font-size: 10px;
  line-height: 1.4;
  color: var(--ink-secondary);
  white-space: pre-wrap;
  background: var(--paper-bg);
  border: 1px solid var(--ink-line);
  border-radius: 6px;
  padding: var(--s-xs);
  max-height: 220px;
  overflow-y: auto;
}

/* ============================================================
   PER-LETTER TIMING (dev panel)
   ============================================================ */

.dev-letter-stats {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-family: var(--font-sans);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  color: var(--ink-secondary);
}
.dev-empty {
  font-style: italic;
  color: var(--ink-quiet);
  margin: 0;
}
.letter-row {
  display: grid;
  grid-template-columns: 36px 1fr 40px 40px;
  gap: var(--s-xs);
  padding: 3px 0;
  border-bottom: 1px solid var(--ink-line);
  align-items: baseline;
}
.letter-row:last-child { border-bottom: 0; }
.letter-row-head {
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-quiet);
  font-weight: 500;
}
.letter-glyph {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 16px;
  color: var(--ink-primary);
}

.calibrate-preview {
  margin-top: var(--s-sm);
  padding-top: var(--s-sm);
  border-top: 1px solid var(--ink-line);
  display: flex;
  flex-direction: column;
  gap: var(--s-xs);
}
.calibrate-line {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--s-xs);
}
.calibrate-line .mono {
  font-family: var(--font-sans);
  font-variant-numeric: tabular-nums;
  font-weight: 500;
  font-size: 11px;
  color: var(--ink-primary);
  letter-spacing: 0.04em;
}
.calibrate-preview .btn { align-self: flex-start; margin-top: 4px; }

.spark-baseline {
  stroke: var(--ink-line);
  stroke-width: 1;
}
.spark-line {
  fill: none;
  stroke: var(--accent);
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.spark-head { fill: var(--accent); }

/* ============================================================
   RESULT TRAJECTORY CHART (large)
   ============================================================ */

.trajectory-section,
.heatmap-section {
  display: flex;
  flex-direction: column;
  gap: var(--s-md);
}

.trajectory {
  padding: var(--s-md) 0;
}
.trajectory-svg {
  width: 100%;
  height: auto;
  max-height: 200px;
  display: block;
}
.trajectory-line {
  fill: none;
  stroke: var(--accent);
  stroke-width: 2;
  stroke-linejoin: round;
  stroke-linecap: round;
}
.trajectory-fill {
  fill: var(--accent);
  opacity: 0.08;
  stroke: none;
}
.trajectory-svg .grid line {
  stroke: var(--ink-line);
  stroke-width: 1;
}
.trajectory-svg .grid .tick-x line {
  stroke: var(--ink-line-strong);
}
.trajectory-svg .grid text {
  font-family: var(--font-sans);
  font-size: 10px;
  fill: var(--ink-quiet);
  letter-spacing: 0.02em;
}

/* ============================================================
   PER-TARGET SUMMARY
   ============================================================ */

.heatmap {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(58px, 1fr));
  gap: var(--s-xs);
}
.heat-cell {
  --heat: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: var(--s-xs) var(--s-sm);
  border-radius: 0;
  background: transparent;
  border-top: 1px solid color-mix(in oklch, var(--ink-line) calc(75% - var(--heat) * 25%), var(--error) calc(var(--heat) * 25%));
}
.heat-glyph {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 20px;
  color: var(--ink-primary);
  font-style: italic;
}
.heat-ms {
  font-family: var(--font-sans);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  font-weight: 600;
  color: var(--ink-primary);
  letter-spacing: 0.02em;
}
.heat-meta {
  font-family: var(--font-sans);
  font-size: 9px;
  color: var(--ink-quiet);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

@media (max-width: 560px) {
  .title-actions .btn {
    width: 100%;
  }
}

/* ============================================================
   FOCUS / BLUR OVERLAY
   ============================================================ */

.blur-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  background: oklch(96.5% 0.012 85 / 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.blur-overlay[hidden] { display: none; }

.overlay-label {
  font-family: var(--font-sans);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-primary);
  background: var(--paper-card);
  padding: 10px 18px;
  border-radius: 999px;
  border: 1px solid var(--ink-line-strong);
}

/* ============================================================
   REDUCED MOTION
   ============================================================ */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .hero,
  .rate-display-xl,
  .formula,
  .title-actions,
  .game-mark,
  .readout,
  .game-hud,
  .play-area,
  .plate,
  .calibration-copy,
  .mode-grid,
  .calibration-recommendation,
  .bar-fill {
    filter: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
  .bar-fill { transform: scaleX(1) !important; }
}