:root {
  --paper: #f3ecdb;
  --paper-deep: #ebe2ca;
  --ink: #1a1612;
  --ink-soft: #3a2f24;
  --ink-muted: #7a6b56;
  --rule: #c8b994;
  --accent: #b54427;
  --correct: #2f6a3a;
  --wrong: #a83024;
  --card: #fbf6e8;
  --shadow: 0 1px 0 rgba(26, 22, 18, 0.06), 0 6px 24px -8px rgba(26, 22, 18, 0.18);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  background:
    radial-gradient(1200px 600px at 80% -10%, #f9f2de 0%, transparent 60%),
    radial-gradient(900px 500px at -10% 110%, #ede3c7 0%, transparent 55%),
    var(--paper);
  color: var(--ink);
  font-family: "Fraunces", Georgia, serif;
  font-optical-sizing: auto;
  font-feature-settings: "ss01", "ss02";
  display: flex;
  flex-direction: column;
  padding: 28px clamp(16px, 4vw, 56px) 24px;
  gap: 24px;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(rgba(90, 70, 40, 0.055) 1px, transparent 1.2px);
  background-size: 3px 3px;
  mix-blend-mode: multiply;
  opacity: 0.55;
  z-index: 1;
}

.hdr,
.main,
.ftr {
  position: relative;
  z-index: 2;
}

.hdr {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 14px;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
}

.brand-mark {
  font-weight: 800;
  font-size: clamp(28px, 3.4vw, 42px);
  letter-spacing: -0.02em;
  line-height: 1;
}

.brand-mark::first-letter {
  color: var(--accent);
}

.brand-tag {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--ink-muted);
}

.score {
  display: flex;
  gap: 4px;
  font-family: "JetBrains Mono", ui-monospace, monospace;
}

.score-cell {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  padding: 6px 14px;
  border-left: 1px solid var(--rule);
}

.score-cell:first-child {
  border-left: none;
}

.score-val {
  font-size: 22px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1;
}

.score-lbl {
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--ink-muted);
  margin-top: 4px;
}

.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 22px;
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
}

.prompt {
  text-align: center;
  padding: 8px 0 4px;
}

.prompt-lead,
.prompt-sub {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--ink-muted);
}

.prompt-sub {
  margin-top: 6px;
  text-transform: none;
  letter-spacing: 0.04em;
  font-size: 12px;
}

.target {
  font-size: clamp(52px, 8vw, 96px);
  font-weight: 600;
  line-height: 1;
  margin: 10px 0 22px;
  letter-spacing: -0.03em;
  font-style: italic;
  color: var(--ink);
}

.target .quote {
  color: var(--accent);
  font-style: normal;
  font-weight: 400;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

@media (max-width: 680px) {
  .grid {
    grid-template-columns: 1fr;
  }
}

.card {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 18px 18px 14px;
  cursor: pointer;
  position: relative;
  transition: transform 120ms ease, box-shadow 160ms ease, border-color 160ms ease;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.card::before {
  content: "";
  position: absolute;
  inset: 3px;
  border: 1px solid rgba(26, 22, 18, 0.06);
  border-radius: 4px;
  pointer-events: none;
}

.card:hover:not(.locked) {
  transform: translateY(-2px);
  border-color: var(--ink-soft);
}

.card.locked {
  cursor: default;
}

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--ink-muted);
}

.card-letter {
  font-family: "Fraunces", serif;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0;
  color: var(--ink);
  text-transform: none;
}

.card-word {
  font-family: "Fraunces", serif;
  font-size: 20px;
  font-weight: 600;
  font-style: italic;
  letter-spacing: -0.01em;
  text-transform: lowercase;
  color: transparent;
  transition: color 260ms ease;
  min-height: 1em;
  line-height: 1;
}

.card.revealed .card-word {
  color: var(--ink);
}

.card.revealed.correct {
  border-color: var(--correct);
  background: #f1f6ec;
}

.card.revealed.wrong-pick {
  border-color: var(--wrong);
  background: #f6ecea;
}

.card.revealed .card-word {
  color: var(--ink-soft);
}

.card.revealed.correct .card-word,
.card.revealed.target .card-word {
  color: var(--correct);
  font-weight: 800;
}

.card.revealed.wrong-pick .card-word {
  color: var(--wrong);
}

.card-chart {
  width: 100%;
  aspect-ratio: 16 / 9;
  display: block;
}

.card-chart .grid-line {
  stroke: rgba(26, 22, 18, 0.08);
  stroke-width: 0.5;
}

.card-chart .axis {
  stroke: var(--ink-soft);
  stroke-width: 0.8;
}

.card-chart .curve {
  fill: none;
  stroke: var(--ink);
  stroke-width: 1.8;
  stroke-linejoin: round;
  stroke-linecap: round;
}

.card-chart .curve-fill {
  fill: rgba(26, 22, 18, 0.07);
  stroke: none;
}

.card.revealed.correct .curve,
.card.revealed.target .curve {
  stroke: var(--correct);
}

.card.revealed.correct .curve-fill,
.card.revealed.target .curve-fill {
  fill: rgba(47, 106, 58, 0.12);
}

.card.revealed.wrong-pick .curve {
  stroke: var(--wrong);
}

.card.revealed.wrong-pick .curve-fill {
  fill: rgba(168, 48, 36, 0.1);
}

.chart-box {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.chart-axis {
  display: flex;
  justify-content: space-between;
  padding: 0 2px;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 10px;
  color: var(--ink-muted);
  letter-spacing: 0.02em;
}

.card-peak {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 10px;
  color: var(--ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  opacity: 0;
  transition: opacity 260ms ease;
}

.card.revealed .card-peak {
  opacity: 1;
}

.controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 44px;
}

.result {
  font-family: "Fraunces", serif;
  font-size: 18px;
  font-style: italic;
  color: var(--ink-soft);
}

.result .accent-correct {
  color: var(--correct);
  font-weight: 600;
  font-style: normal;
}

.result .accent-wrong {
  color: var(--wrong);
  font-weight: 600;
  font-style: normal;
}

.controls-buttons {
  display: flex;
  gap: 10px;
  align-items: center;
}

.btn {
  font-family: "Fraunces", serif;
  font-size: 18px;
  font-weight: 600;
  padding: 10px 24px;
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--ink);
  border-radius: 999px;
  cursor: pointer;
  letter-spacing: -0.01em;
  transition: transform 120ms ease, background 160ms ease, border-color 160ms ease, color 160ms ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  line-height: 1;
}

.btn:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--paper);
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn-secondary {
  background: transparent;
  color: var(--ink);
  border-color: var(--ink-soft);
}

.btn-secondary:hover {
  background: transparent;
  color: var(--ink);
  border-color: var(--ink);
}

.gemini-spark {
  background: linear-gradient(135deg, #4285f4 0%, #9b72cb 45%, #d96570 80%, #f9ab00 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  font-size: 20px;
  line-height: 1;
  display: inline-block;
  transform: translateY(1px);
}

.btn-secondary:hover .gemini-spark {
  animation: spark-spin 600ms ease;
}

@keyframes spark-spin {
  0% { transform: translateY(1px) rotate(0deg) scale(1); }
  50% { transform: translateY(1px) rotate(180deg) scale(1.2); }
  100% { transform: translateY(1px) rotate(360deg) scale(1); }
}

.answer {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 22px 26px;
  animation: answer-drop 260ms ease;
}

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

.answer-text {
  font-family: "Fraunces", serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  white-space: pre-wrap;
}

.answer-text strong { font-weight: 700; }
.answer-text em { font-style: italic; }
.answer-text code {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 13px;
  background: rgba(26, 22, 18, 0.06);
  padding: 1px 5px;
  border-radius: 3px;
}

.answer-text.streaming::after {
  content: "▍";
  display: inline-block;
  margin-left: 2px;
  animation: blink 900ms steps(2) infinite;
  color: var(--accent);
}

@keyframes blink {
  to { opacity: 0; }
}

.answer-text.error {
  color: var(--wrong);
  font-style: italic;
}

.ftr {
  border-top: 1px solid var(--rule);
  padding-top: 12px;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--ink-muted);
  text-align: center;
}