:root {
  color-scheme: dark;
  --ink: #f1f6f4;
  --muted: #9eaaa7;
  --night: #091110;
  --panel: #111d1b;
  --line: #29403b;
  --lime: #c9f45b;
  --cyan: #65d9d2;
  --danger: #ff7b70;
  --display: "Arial Black", "Helvetica Neue", Arial, sans-serif;
  --body: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
html { min-width: 280px; background: var(--night); }
body { min-height: 100vh; margin: 0; color: var(--ink); background: linear-gradient(rgba(101, 217, 210, 0.025) 1px, transparent 1px), linear-gradient(90deg, rgba(101, 217, 210, 0.025) 1px, transparent 1px), radial-gradient(circle at 80% 5%, rgba(101, 217, 210, 0.1), transparent 28rem), var(--night); background-size: 34px 34px, 34px 34px, auto, auto; font-family: var(--body); line-height: 1.5; }
a { color: inherit; }
button, input { font: inherit; }
.site-header, main, footer { width: min(1040px, calc(100% - 40px)); margin-inline: auto; }
.site-header { display: flex; align-items: center; justify-content: space-between; min-height: 80px; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 11px; color: var(--ink); font-weight: 850; text-decoration: none; }
.brand-mark { display: grid; width: 34px; height: 34px; place-items: center; color: var(--night); background: var(--lime); border-radius: 9px; font-family: var(--display); }
.site-header p { margin: 0; color: var(--muted); font-size: 0.7rem; font-weight: 800; letter-spacing: 0.13em; text-transform: uppercase; }
.site-header p span, .eyebrow { color: var(--cyan); }
.intro { display: grid; grid-template-columns: 1fr minmax(260px, 400px); gap: 60px; align-items: end; padding: 66px 0 42px; }
.intro > p { margin-bottom: 5px; color: var(--muted); }
.eyebrow { margin: 0 0 10px; font-size: 0.72rem; font-weight: 850; letter-spacing: 0.18em; text-transform: uppercase; }
h1, h2, p { margin-top: 0; }
h1 { margin-bottom: 0; font-family: var(--display); font-size: clamp(4rem, 11vw, 8rem); line-height: 0.82; letter-spacing: -0.075em; }
.game-shell { overflow: hidden; background: rgba(17, 29, 27, 0.97); border: 1px solid var(--line); border-radius: 17px; }
.case-header { display: grid; grid-template-columns: 120px 1fr auto; gap: 18px; align-items: center; padding: 18px 22px; border-bottom: 1px solid var(--line); }
.case-header > div:first-child { display: grid; }
.case-header span { color: var(--muted); font-size: 0.62rem; font-weight: 850; letter-spacing: 0.13em; text-transform: uppercase; }
.case-header strong { color: var(--cyan); font: 850 2rem/1 ui-monospace, SFMono-Regular, Menlo, monospace; }
.case-header p { margin: 0; color: var(--muted); font-size: 0.78rem; }
.case-header button, .guess-row button, .give-up { min-height: 46px; padding: 0 17px; color: var(--ink); background: transparent; border: 1px solid #46615b; border-radius: 8px; font-weight: 800; cursor: pointer; }
.case-header .game-actions { display: flex; flex-wrap: nowrap; gap: 8px; }
.game-actions button { white-space: nowrap; }
.case-header button:hover, .case-header button:focus-visible, .guess-row button:hover, .guess-row button:focus-visible { color: var(--night); background: var(--lime); border-color: var(--lime); }
form { max-width: 650px; margin: 0 auto; padding: 44px 24px 28px; }
form label { display: block; margin-bottom: 9px; color: var(--muted); font-size: 0.7rem; font-weight: 850; letter-spacing: 0.12em; text-transform: uppercase; }
.guess-row { display: grid; grid-template-columns: 1fr auto; gap: 9px; }
.guess-row input { min-width: 0; height: 62px; padding: 0 18px; color: var(--ink); background: #09100e; border: 1px solid #46615b; border-radius: 9px; outline: none; font: 850 2rem/1 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: 0.28em; }
.guess-row input:focus { border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(101, 217, 210, 0.12); }
.guess-row input[aria-invalid="true"] { border-color: var(--danger); }
.guess-row button { padding-inline: 24px; }
.validation { margin: 10px 0 0; color: var(--muted); font-size: 0.74rem; }
.validation--error { color: var(--danger); }
.answer-panel { display: flex; align-items: center; justify-content: space-between; max-width: 602px; margin: 0 auto 28px; padding: 14px 18px; color: var(--night); background: var(--lime); border-radius: 9px; }
.answer-panel[hidden] { display: none; }
.answer-panel span { font-size: 0.7rem; font-weight: 850; letter-spacing: 0.12em; text-transform: uppercase; }
.answer-panel strong { font: 850 1.8rem ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: 0.2em; }
.history-block { max-width: 650px; margin: 0 auto; padding: 0 24px 24px; }
.history-heading { display: flex; align-items: center; justify-content: space-between; padding-bottom: 10px; border-bottom: 1px solid var(--line); }
.history-heading h2 { margin: 0; font-size: 0.82rem; letter-spacing: 0.06em; text-transform: uppercase; }
.history-heading span { color: var(--muted); font-size: 0.68rem; }
.history { margin: 0; padding: 0; list-style: none; }
.history li { display: grid; grid-template-columns: 42px 1fr auto; gap: 14px; align-items: center; min-height: 58px; border-bottom: 1px solid var(--line); }
.history li > span { color: var(--muted); font: 750 0.68rem var(--display); }
.history li > strong { font: 850 1.28rem ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: 0.16em; }
.history li > div { display: flex; gap: 6px; }
.history li b { min-width: 42px; padding: 5px 7px; color: var(--night); background: var(--cyan); border-radius: 5px; text-align: center; }
.history li b:last-child { background: var(--lime); }
.history .history-empty { display: block; padding: 20px 0; color: var(--muted); font-size: 0.78rem; }
.give-up { display: block; margin: 0 auto 34px; color: var(--muted); border-color: transparent; font-size: 0.75rem; }
.give-up:hover, .give-up:focus-visible { color: var(--danger); }
button:disabled, input:disabled { opacity: 0.5; cursor: default; }
.leaderboard { margin-top: 24px; padding: 24px; background: var(--panel); border: 1px solid var(--line); border-radius: 17px; }
.leaderboard-heading { display: grid; grid-template-columns: auto minmax(260px, 450px); gap: 30px; align-items: end; justify-content: space-between; margin-bottom: 18px; }
.leaderboard-heading h2 { margin: 0; font: 900 clamp(1.8rem, 4vw, 3rem)/1 var(--display); letter-spacing: -0.05em; }
.leaderboard-heading > p, .leaderboard-empty { margin: 0; color: var(--muted); font-size: 0.8rem; }
.leaderboard-list, #result-leaderboard-list { margin: 0; padding: 0; list-style: none; }
.leaderboard-list { display: grid; grid-template-columns: 1fr 1fr; gap: 7px 20px; }
.leaderboard-list li, #result-leaderboard-list li { display: grid; grid-template-columns: 2rem minmax(0, 1fr) auto; gap: 8px; align-items: center; min-width: 0; background: #0b1513; border: 1px solid #263c37; border-radius: 7px; }
.leaderboard-list li { padding: 9px 10px; font-size: 0.76rem; }
.leaderboard-rank { color: var(--cyan); font: 850 0.7rem/1 ui-monospace, monospace; }
.leaderboard-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.leaderboard-result { color: var(--muted); white-space: nowrap; font-family: ui-monospace, monospace; }
.result-panel { width: min(520px, calc(100% - 28px)); max-height: calc(100dvh - 28px); margin: auto; padding: 30px; overflow-y: auto; color: var(--ink); background: radial-gradient(circle at 50% 0, rgba(101, 217, 210, 0.17), transparent 50%), var(--panel); border: 1px solid rgba(101, 217, 210, 0.58); border-radius: 20px; box-shadow: 0 24px 80px rgba(0, 0, 0, 0.62); text-align: center; }
.result-panel::backdrop { background: rgba(3, 9, 8, 0.84); backdrop-filter: blur(5px); }
.result-kicker { margin: 0 0 6px; color: var(--cyan); font-size: 0.7rem; font-weight: 900; letter-spacing: 0.16em; text-transform: uppercase; }
.result-panel > h2 { margin: 0; font: 900 clamp(2.4rem, 9vw, 4rem)/0.95 var(--display); letter-spacing: -0.06em; }
#result-message { margin: 14px auto; color: var(--muted); }
.result-stat { display: grid; margin: 16px auto; place-items: center; }
.result-stat[hidden], .score-form[hidden] { display: none; }
.result-stat strong { color: var(--lime); font: 900 2.3rem/1 ui-monospace, monospace; }
.result-stat span { color: var(--muted); font-size: 0.62rem; font-weight: 850; letter-spacing: 0.13em; text-transform: uppercase; }
.score-entry { margin-bottom: 14px; padding: 12px; color: var(--muted); background: rgba(5, 14, 12, 0.58); border: 1px solid var(--line); border-radius: 9px; font-size: 0.76rem; }
.score-entry > p { margin: 0; }
.score-form { max-width: none; margin: 11px 0 0; padding: 0; text-align: left; }
.score-form > div { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 7px; }
.score-form input, .score-form button { min-height: 44px; border-radius: 7px; }
.score-form input { min-width: 0; padding: 0 10px; color: var(--ink); background: var(--night); border: 1px solid #46615b; }
.score-form button { padding: 0 13px; color: var(--night); background: var(--lime); border: 1px solid var(--lime); font-weight: 850; cursor: pointer; }
.result-leaderboard { margin-bottom: 14px; padding: 11px; background: rgba(5, 14, 12, 0.58); border: 1px solid var(--line); border-radius: 9px; text-align: left; }
.result-leaderboard > div { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 7px; }
.result-leaderboard h3, .result-leaderboard p { margin: 0; }
.result-leaderboard h3 { font: 900 1.1rem/1 var(--display); }
.result-leaderboard small, .result-leaderboard p { color: var(--muted); font-size: 0.64rem; }
#result-leaderboard-list { display: grid; gap: 4px; }
#result-leaderboard-list li { padding: 5px 6px; font-size: 0.65rem; }
.result-actions { display: grid; grid-template-columns: repeat(3, 1fr); gap: 7px; }
.result-actions button { min-height: 46px; padding: 0 8px; color: var(--ink); background: transparent; border: 1px solid #46615b; border-radius: 8px; font-size: 0.72rem; font-weight: 850; cursor: pointer; }
.result-actions #result-new-secret { color: var(--night); background: var(--lime); border-color: var(--lime); }
.result-actions button:hover, .result-actions button:focus-visible { box-shadow: 0 0 0 3px rgba(101, 217, 210, 0.14); }
.rules { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(50px, 10vw, 120px); padding: 96px 0; }
.rules h2 { margin: 0; font-family: var(--display); font-size: clamp(2rem, 4vw, 3.8rem); line-height: 0.98; letter-spacing: -0.05em; }
.rule-copy p { color: var(--muted); }
.rule-copy strong { color: var(--ink); }
footer { display: flex; justify-content: space-between; padding: 28px 0 42px; color: var(--muted); border-top: 1px solid var(--line); font-size: 0.8rem; }
footer a { color: var(--ink); font-weight: 750; text-decoration: none; }
footer p { margin: 0; }

@media (max-width: 700px) {
  .site-header, main, footer { width: min(100% - 24px, 620px); }
  .intro, .rules { grid-template-columns: 1fr; gap: 22px; }
  .intro { padding-top: 50px; }
  .case-header { grid-template-columns: 1fr; }
  .case-header p { grid-column: 1 / -1; grid-row: 2; }
  .case-header .game-actions { grid-row: 3; width: 100%; }
  .game-actions button { flex: 1 1 0; min-width: 0; padding-inline: 8px; }
  .leaderboard-heading { display: block; }
  .leaderboard-heading > p { margin-top: 10px; }
  .leaderboard-list { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .site-header { min-height: 68px; }
  .intro { padding: 44px 0 32px; }
  .game-shell { border-radius: 12px; }
  .case-header { padding: 14px; }
  .case-header .game-actions { gap: 5px; }
  .game-actions button { padding-inline: 4px; font-size: clamp(0.68rem, 3.25vw, 0.8rem); }
  form { padding: 28px 14px 24px; }
  .guess-row { grid-template-columns: 1fr; }
  .guess-row button { min-height: 52px; }
  .history-block { padding-inline: 14px; }
  .answer-panel { margin-inline: 14px; }
  .leaderboard { padding: 18px 14px; }
  .result-panel { padding: 24px 16px; }
  .score-form > div { grid-template-columns: 1fr; }
  .result-actions { grid-template-columns: 1fr; }
  #result-leaderboard-list li { grid-template-columns: 1.4rem minmax(0, 1fr); }
  #result-leaderboard-list .leaderboard-result { grid-column: 2; }
  .rules { padding: 72px 0 82px; }
  footer { display: block; }
  footer p { margin-top: 6px; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }