:root {
  color-scheme: dark;
  --deep: #07151d;
  --deep-blue: #0a202a;
  --sea: #8bc8c0;
  --sea-bright: #c4e2d9;
  --sand: #d0b88e;
  --mist: rgba(229, 239, 231, .72);
  --muted: rgba(210, 226, 220, .48);
  --line: rgba(210, 226, 220, .17);
  --sans: "DM Sans", Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --serif: "Iowan Old Style", "Baskerville", "Palatino Linotype", Georgia, serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-family: var(--sans);
  background: var(--deep);
  color: #eef3ec;
}
* { box-sizing: border-box; }
html, body { width: 100%; min-width: 320px; min-height: 100%; margin: 0; }
body { min-height: 100svh; overflow: hidden; background: var(--deep); -webkit-font-smoothing: antialiased; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--sea-bright); outline-offset: 4px; }
.ocean-stage {
  position: relative;
  isolation: isolate;
  display: flex;
  width: 100%;
  min-height: 100svh;
  overflow: hidden;
  align-items: center;
  background:
    radial-gradient(ellipse at 72% 48%, rgba(23, 72, 83, .84) 0%, rgba(12, 39, 50, .68) 31%, transparent 62%),
    radial-gradient(ellipse at 23% 82%, rgba(22, 58, 66, .45), transparent 45%),
    linear-gradient(135deg, #07151d 0%, #0a202a 52%, #07141b 100%);
}
.ocean-stage::before, .ocean-stage::after {
  position: absolute;
  z-index: -1;
  inset: -25%;
  content: "";
  pointer-events: none;
}
.ocean-stage::before {
  opacity: .42;
  background:
    linear-gradient(115deg, transparent 25%, rgba(178, 218, 207, .055) 40%, transparent 49%),
    linear-gradient(108deg, transparent 54%, rgba(178, 218, 207, .035) 62%, transparent 70%);
  transform: translateX(-8%);
  animation: water-drift 24s ease-in-out infinite alternate;
}
.ocean-stage::after {
  opacity: .35;
  background: radial-gradient(ellipse at 70% 50%, transparent 22%, rgba(1, 9, 14, .42) 78%);
}
.water-glow {
  position: absolute;
  z-index: -1;
  top: -35%;
  right: -14%;
  width: min(86vw, 1100px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(82, 151, 151, .12), rgba(30, 91, 103, .045) 42%, transparent 70%);
  pointer-events: none;
}
.water-grain {
  position: absolute;
  z-index: 3;
  inset: 0;
  opacity: .15;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.92' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.18'/%3E%3C/svg%3E");
  mix-blend-mode: soft-light;
}
.ocean-canvas { position: absolute; z-index: 0; inset: 0; display: block; width: 100%; height: 100%; touch-action: none; }
.game-header, .game-intro, .scene-caption, .game-controls, .keyboard-hint { position: absolute; z-index: 2; }
.game-header {
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  height: 86px;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(1.35rem, 5.8vw, 6rem);
  border-bottom: 1px solid rgba(218, 232, 223, .12);
}
.wordmark { display: inline-flex; align-items: center; gap: .75rem; color: #edf2ec; text-decoration: none; font: 500 .7rem var(--mono); letter-spacing: .13em; }
.wordmark-light { color: rgba(237, 242, 236, .53); }
.mark { display: inline-flex; height: 18px; align-items: center; gap: 2px; transform: skewY(-27deg); }
.mark i { display: block; width: 3px; height: 12px; border-radius: 3px; background: var(--sea); }
.mark i:nth-child(2) { height: 18px; opacity: .68; }
.mark i:nth-child(3) { height: 8px; opacity: .42; }
.field-note { display: flex; align-items: center; gap: .7rem; margin: 0; color: var(--muted); font: 400 .58rem var(--mono); letter-spacing: .14em; }
.live-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--sea); box-shadow: 0 0 12px rgba(139, 200, 192, .65); }
.game-intro { top: 50%; left: clamp(1.5rem, 11.2vw, 11rem); width: min(420px, 34vw); transform: translateY(-48%); pointer-events: none; }
.eyebrow { display: flex; align-items: center; gap: .72rem; margin: 0 0 1.4rem; color: var(--sand); font: 500 .61rem var(--mono); letter-spacing: .17em; }
.eyebrow-rule { width: 30px; height: 1px; background: var(--sand); }
h1 { margin: 0; color: #eef3ec; font: 400 clamp(3.9rem, 6.9vw, 7.2rem)/.88 var(--serif); letter-spacing: -.07em; }
h1 em { color: var(--sea); font-weight: 400; }
.intro-copy { max-width: 355px; margin: 1.55rem 0 0; color: rgba(225, 237, 228, .71); font-size: clamp(.91rem, 1.12vw, 1.04rem); line-height: 1.75; }
.scene-status { display: flex; align-items: center; gap: .55rem; margin: 2rem 0 0; color: rgba(139, 200, 192, .83); font: 400 .58rem var(--mono); letter-spacing: .1em; text-transform: uppercase; }
.scene-status::before { width: 5px; height: 5px; border-radius: 50%; background: currentColor; content: ""; }
.scene-caption { right: clamp(1.5rem, 6vw, 6rem); top: 50%; display: flex; align-items: center; gap: .68rem; transform: translateY(-50%); color: rgba(225, 237, 228, .38); font: 400 .53rem var(--mono); letter-spacing: .13em; writing-mode: vertical-rl; }
.scene-caption i { width: 1px; height: 42px; background: linear-gradient(var(--sand), transparent); }
.game-controls {
  right: clamp(1.35rem, 5.8vw, 6rem);
  bottom: 2.3rem;
  left: clamp(1.35rem, 5.8vw, 6rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding-top: 1.3rem;
  border-top: 1px solid var(--line);
}
.how-to-play { display: flex; align-items: center; gap: .8rem; margin: 0; color: rgba(225, 237, 228, .56); font-size: .76rem; }
.how-to-play strong { color: rgba(225, 237, 228, .91); font-weight: 500; }
.control-symbol { color: var(--sea); font: 400 1.4rem var(--serif); }
.control-divider { padding: 0 .42rem; color: var(--sand); }
.control-actions { display: flex; align-items: center; gap: .55rem; }
.control-button {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  gap: .7rem;
  padding: 0 .95rem;
  border: 1px solid rgba(220, 234, 225, .27);
  border-radius: 2px;
  color: #eaf1e9;
  background: rgba(6, 20, 27, .3);
  cursor: pointer;
  font-size: .71rem;
  transition: background .2s ease, border-color .2s ease, transform .2s ease;
}
.control-button span { color: var(--sea); font-size: .95rem; }
.control-button:hover { transform: translateY(-1px); border-color: rgba(139, 200, 192, .7); background: rgba(36, 86, 94, .35); }
.control-button-quiet { border-color: transparent; color: rgba(225, 237, 228, .58); background: transparent; }
.control-button-quiet:hover { color: #eef3ec; background: rgba(225, 237, 228, .06); }
.control-button-pause { min-width: 104px; }
.keyboard-hint { right: clamp(1.35rem, 5.8vw, 6rem); bottom: .68rem; margin: 0; color: rgba(210, 226, 220, .35); font: 400 .5rem var(--mono); letter-spacing: .08em; }
.keyboard-hint kbd { color: rgba(210, 226, 220, .62); font: inherit; }
.keyboard-hint span { padding: 0 .35rem; color: var(--sand); }
@keyframes water-drift { from { transform: translate3d(-2%, 0, 0) rotate(-2deg); } to { transform: translate3d(2%, 1%, 0) rotate(2deg); } }
@media (max-width: 760px) {
  .game-header { height: 70px; padding-inline: 1.25rem; }
  .field-note { font-size: .49rem; letter-spacing: .1em; }
  .game-intro { top: 27%; left: 1.45rem; width: min(390px, 76vw); transform: none; }
  h1 { font-size: clamp(3.45rem, 13vw, 5.8rem); }
  .intro-copy { max-width: 330px; margin-top: 1rem; font-size: .88rem; }
  .scene-status { margin-top: 1rem; font-size: .52rem; }
  .scene-caption { top: auto; right: 1.2rem; bottom: 31%; transform: none; font-size: .46rem; }
  .game-controls { right: 1.15rem; bottom: 2.1rem; left: 1.15rem; display: block; padding-top: .9rem; }
  .how-to-play { gap: .55rem; font-size: .68rem; }
  .control-actions { justify-content: space-between; gap: .35rem; margin-top: .75rem; }
  .control-button { min-height: 40px; padding-inline: .7rem; font-size: .66rem; }
  .control-button-pause { min-width: 82px; }
  .keyboard-hint { display: none; }
}
@media (max-width: 390px) {
  .game-header { height: 62px; }
  .wordmark { gap: .5rem; font-size: .59rem; }
  .field-note { max-width: 132px; font-size: .43rem; line-height: 1.5; }
  .game-intro { top: 23%; left: 1.2rem; width: 80vw; }
  h1 { font-size: 3.3rem; }
  .intro-copy { max-width: 285px; font-size: .82rem; }
  .scene-caption { bottom: 33%; }
  .game-controls { bottom: 1.4rem; }
  .control-actions { gap: .2rem; }
  .control-button { gap: .42rem; padding-inline: .54rem; font-size: .61rem; }
  .control-button-pause { min-width: 76px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}


/* Keep the play surface quiet and let the school carry the scene. */
.game-header { justify-content: flex-start; }
.game-controls { justify-content: center; padding-top: 0; border-top: 0; }
.control-actions { gap: .65rem; }
@media (max-width: 760px) {
  .game-controls { display: flex; justify-content: center; }
  .control-actions { justify-content: center; gap: .45rem; margin-top: 0; }
}