:root {
  color-scheme: dark;
  --ink: #eff7ff;
  --muted: #9db2c4;
  --glass: rgba(5, 18, 30, 0.79);
  --glass-strong: rgba(3, 12, 20, 0.94);
  --line: rgba(255, 255, 255, 0.16);
  --accent: #ffb341;
  --accent-deep: #d77718;
  --danger: #ff554f;
  --ok: #70e5ba;
}

* { box-sizing: border-box; }
html, body { width: 100%; height: 100%; margin: 0; overflow: hidden; background: #07131e; }
body { font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; color: var(--ink); }
button, input, select { font: inherit; }
button { cursor: pointer; }

#game-shell { position: relative; width: 100%; height: 100%; isolation: isolate; background: radial-gradient(circle at 50% 20%, #29495f, #06121d 70%); }
#game-canvas { display: block; width: 100%; height: 100%; touch-action: none; outline: none; }
.hidden { display: none !important; }
.visible { display: flex; }

#vignette {
  pointer-events: none;
  position: absolute;
  inset: 0;
  background: radial-gradient(circle, transparent 47%, rgba(0, 8, 15, 0.18) 72%, rgba(0, 4, 8, 0.52) 100%);
  z-index: 2;
}

#speed-lines {
  pointer-events: none;
  position: absolute;
  inset: 0;
  z-index: 2;
  opacity: 0;
  background: repeating-radial-gradient(ellipse at center, transparent 0 55px, rgba(255,255,255,.03) 58px 59px, transparent 62px 105px);
  transition: opacity .2s ease;
  mix-blend-mode: screen;
}

#damage-flash {
  pointer-events: none;
  position: absolute;
  inset: 0;
  z-index: 8;
  opacity: 0;
  background: radial-gradient(circle, transparent 30%, rgba(255, 18, 10, .62));
}
#damage-flash.hit { animation: damage .42s ease-out; }
@keyframes damage { 0% { opacity: .9; } 100% { opacity: 0; } }

#hud {
  position: absolute;
  z-index: 5;
  inset: 18px 20px auto;
  display: grid;
  grid-template-columns: minmax(180px, 1fr) minmax(240px, 480px) minmax(180px, 1fr);
  gap: 16px;
  align-items: start;
  pointer-events: none;
  text-shadow: 0 2px 5px #000;
}

.hud-block, .hud-center {
  border: 1px solid rgba(255,255,255,.17);
  background: linear-gradient(180deg, rgba(4,18,30,.78), rgba(4,14,23,.48));
  backdrop-filter: blur(9px);
  padding: 11px 14px;
  border-radius: 9px;
  box-shadow: 0 10px 30px rgba(0,0,0,.18);
}
.hud-right { text-align: right; }
.hud-center { text-align: center; padding-bottom: 9px; }
.hud-label { color: var(--muted); font-size: 11px; font-weight: 800; letter-spacing: .17em; }
.hud-value { font-size: clamp(22px, 3vw, 34px); font-variant-numeric: tabular-nums; font-weight: 900; letter-spacing: -.03em; }
.hud-unit { color: var(--muted); font-weight: 700; }
.hud-sub { color: #d4e1ec; font-size: 12px; margin-top: 1px; }
#checkpoint-title { font-size: 16px; font-weight: 900; letter-spacing: .12em; color: var(--accent); }
#checkpoint-value { color: #dce8f2; font-size: 11px; margin-top: 4px; }
.progress-track, .hull-track { height: 7px; overflow: hidden; border-radius: 999px; background: rgba(255,255,255,.13); margin-top: 8px; }
#progress-fill, #hull-fill { height: 100%; width: 0; background: linear-gradient(90deg, var(--accent-deep), var(--accent)); transition: width .15s linear; }

#boat-status {
  position: absolute;
  left: 20px;
  bottom: 20px;
  z-index: 5;
  width: 235px;
  padding: 12px 14px;
  background: rgba(4,16,27,.70);
  border: 1px solid rgba(255,255,255,.16);
  backdrop-filter: blur(8px);
  border-radius: 9px;
  pointer-events: none;
  text-shadow: 0 2px 4px #000;
}
.status-row { display: flex; justify-content: space-between; gap: 20px; font-size: 12px; font-weight: 850; letter-spacing: .08em; }
.status-row.compact { margin-top: 8px; color: #d8e5ee; font-size: 10px; }
#hull-fill { width: 100%; background: var(--ok); }

#message {
  position: absolute;
  z-index: 7;
  left: 50%;
  top: 34%;
  transform: translate(-50%, -50%);
  padding: 14px 24px;
  border-radius: 8px;
  background: rgba(3,10,17,.72);
  border: 1px solid rgba(255,255,255,.22);
  backdrop-filter: blur(8px);
  font-weight: 950;
  font-size: clamp(20px, 4vw, 45px);
  letter-spacing: .08em;
  text-align: center;
  text-shadow: 0 3px 8px #000;
  pointer-events: none;
}

.overlay {
  position: absolute;
  inset: 0;
  z-index: 20;
  align-items: center;
  justify-content: center;
  padding: 22px;
  overflow-y: auto;
  background: radial-gradient(circle at 50% 32%, rgba(19,44,59,.40), rgba(2,9,16,.84));
  backdrop-filter: blur(6px);
}

.panel {
  width: min(700px, 100%);
  padding: clamp(24px, 5vw, 50px);
  border: 1px solid rgba(255,255,255,.16);
  background: linear-gradient(160deg, rgba(4,17,29,.95), rgba(4,12,20,.89));
  box-shadow: 0 28px 90px rgba(0,0,0,.48);
  border-radius: 17px;
}
.hero-panel { position: relative; overflow: hidden; }
.hero-panel::after {
  content: "";
  position: absolute;
  width: 260px;
  height: 260px;
  right: -100px;
  top: -100px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,179,65,.22), transparent 70%);
  pointer-events: none;
}
.eyebrow { color: var(--accent); font-size: 11px; font-weight: 900; letter-spacing: .22em; }
h1, h2 { margin: 8px 0 14px; line-height: .89; letter-spacing: -.05em; }
h1 { font-size: clamp(43px, 8vw, 78px); }
h1 span { color: var(--accent); }
h2 { font-size: clamp(40px, 7vw, 68px); }
.intro, .panel p { color: #c4d2dd; line-height: 1.55; }
.intro { max-width: 610px; }

.menu-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 25px 0 16px; }
.field { display: grid; gap: 6px; }
.field span { color: var(--muted); font-size: 10px; font-weight: 850; letter-spacing: .12em; }
input, select {
  min-width: 0;
  width: 100%;
  color: var(--ink);
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 8px;
  padding: 12px 13px;
  outline: none;
}
input:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(255,179,65,.13); }
select option { background: #0a1722; }

.primary-button, .secondary-button, .text-button {
  border: 0;
  border-radius: 8px;
  font-weight: 900;
  letter-spacing: .06em;
  transition: transform .15s ease, filter .15s ease, background .15s ease;
}
.primary-button:hover, .secondary-button:hover { transform: translateY(-1px); filter: brightness(1.08); }
.primary-button { width: 100%; padding: 15px 18px; color: #201000; background: linear-gradient(180deg, #ffc765, var(--accent)); box-shadow: 0 12px 28px rgba(215,119,24,.22); }
.secondary-button { width: 100%; margin-top: 10px; padding: 13px 16px; color: var(--ink); background: rgba(255,255,255,.09); border: 1px solid rgba(255,255,255,.16); }
.text-button { color: #d7e2eb; background: transparent; padding: 8px; }
.text-button:hover { color: white; text-decoration: underline; }
.text-button.wide { width: 100%; margin-top: 8px; }
.text-button.danger { color: #ff9792; }

.controls { display: flex; flex-wrap: wrap; gap: 10px 20px; margin: 20px 0 16px; color: var(--muted); font-size: 12px; }
.controls div { display: flex; align-items: center; gap: 5px; }
kbd { min-width: 27px; padding: 5px 7px; text-align: center; color: #fff; border: 1px solid rgba(255,255,255,.24); background: rgba(255,255,255,.09); border-radius: 5px; box-shadow: inset 0 -2px rgba(0,0,0,.25); font-size: 10px; font-weight: 900; }
.best-box { display: flex; justify-content: space-between; align-items: center; gap: 16px; border-top: 1px solid var(--line); padding-top: 15px; }
.best-box div { display: grid; gap: 2px; }
.best-box span { color: var(--muted); font-size: 10px; font-weight: 850; letter-spacing: .1em; }
.best-box strong { font-variant-numeric: tabular-nums; }

.small-panel { width: min(430px, 100%); text-align: center; }
.result-panel { width: min(560px, 100%); text-align: center; }
.result-time { color: var(--accent); font-size: clamp(45px, 9vw, 76px); font-weight: 950; font-variant-numeric: tabular-nums; letter-spacing: -.06em; }
.result-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; margin: 24px 0; overflow: hidden; border: 1px solid var(--line); border-radius: 9px; background: var(--line); }
.result-grid div { display: grid; gap: 4px; padding: 14px; background: rgba(4,16,26,.96); }
.result-grid span { color: var(--muted); font-size: 10px; font-weight: 850; letter-spacing: .1em; }
.result-grid strong { font-variant-numeric: tabular-nums; }
.record-message { min-height: 25px; color: var(--ok) !important; font-weight: 850; }

.scores-panel { width: min(500px, 100%); }
#score-list { margin: 24px 0; padding: 0; list-style: none; counter-reset: score; }
#score-list li { counter-increment: score; display: grid; grid-template-columns: 38px 1fr auto; gap: 10px; align-items: center; padding: 12px 0; border-bottom: 1px solid var(--line); }
#score-list li::before { content: counter(score); width: 28px; height: 28px; display: grid; place-items: center; border-radius: 50%; background: rgba(255,179,65,.13); color: var(--accent); font-weight: 900; }
#score-list strong { font-variant-numeric: tabular-nums; }
#score-list span { color: var(--muted); }
.empty-score { color: var(--muted); text-align: center; padding: 30px 0 !important; display: block !important; }
.empty-score::before { content: none !important; }

.loading-layer { z-index: 100; background: #06121d; }
.loading-box { display: grid; place-items: center; gap: 12px; text-align: center; }
.loading-box span { color: var(--muted); font-size: 13px; }
.loader { width: 46px; height: 46px; border-radius: 50%; border: 3px solid rgba(255,255,255,.13); border-top-color: var(--accent); animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.fatal-error { position: absolute; inset: auto 20px 20px; z-index: 200; padding: 16px; background: #451817; border: 1px solid #ff8b84; border-radius: 8px; }
.fatal-error strong, .fatal-error span { display: block; }
.fatal-error span { margin-top: 4px; color: #ffd7d4; }

@media (max-width: 720px) {
  #hud { inset: 9px 9px auto; grid-template-columns: 1fr 1fr; gap: 7px; }
  .hud-center { grid-column: 1 / -1; grid-row: 2; }
  .hud-block { padding: 8px 10px; }
  #boat-status { left: 9px; bottom: 9px; width: 190px; padding: 9px 10px; }
  .menu-grid { grid-template-columns: 1fr; }
  .panel { padding: 24px; }
  .intro { font-size: 14px; }
  .controls { gap: 8px 14px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
}