:root {
  color-scheme: dark;
  --ink: #f2fffc;
  --muted: #a9dcd7;
  --panel: rgba(0, 51, 76, .75);
  --edge: rgba(152, 255, 236, .2);
  --foam: #b8fff1;
  --sand: #ffd79c;
}

* { box-sizing: border-box; }
html { min-width: 0; background: #031e36; }
body {
  min-width: 0;
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  font-family: ui-rounded, "Trebuchet MS", system-ui, sans-serif;
  background:
    radial-gradient(ellipse at 50% -10%, rgba(97, 245, 223, .28), transparent 45%),
    radial-gradient(circle at 8% 38%, rgba(51, 164, 205, .24), transparent 26%),
    linear-gradient(180deg, #075d79, #03233f 58%, #021729);
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .22;
  background-image: radial-gradient(circle, rgba(205,255,246,.75) 0 2px, transparent 2.5px);
  background-size: 68px 68px;
  background-position: 9px 18px;
}
button { font: inherit; }

.game-shell { position: relative; width: min(100%, 720px); margin: 0 auto; padding: clamp(12px, 3vw, 26px); }
.game-header { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-bottom: 12px; }
.eyebrow { margin: 0 0 3px; color: #96e9de; font-size: .7rem; font-weight: 900; letter-spacing: .14em; text-transform: uppercase; }
h1, h2 { margin: 0; line-height: 1.05; }
h1 { font-size: clamp(1.45rem, 5.3vw, 2.35rem); letter-spacing: -.04em; text-shadow: 0 3px 18px rgba(0, 17, 32, .4); }
.actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 7px; }
.actions button, .primary {
  min-height: 44px;
  border: 1px solid var(--edge);
  border-radius: 12px 12px 18px 18px;
  padding: 9px 14px;
  color: var(--ink);
  background: rgba(0, 34, 57, .68);
  box-shadow: inset 0 1px rgba(255,255,255,.1), 0 8px 18px rgba(0, 13, 29, .24);
  cursor: pointer;
  font-weight: 850;
}
.actions button:hover { border-color: rgba(184,255,241,.55); background: rgba(3, 67, 91, .86); transform: translateY(-1px); }
button:focus-visible, canvas:focus-visible { outline: 3px solid var(--sand); outline-offset: 3px; }

.hud { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 7px; margin-bottom: 8px; }
.hud div { min-width: 0; padding: 9px 5px; border: 1px solid var(--edge); border-radius: 16px 16px 10px 10px; text-align: center; background: var(--panel); box-shadow: inset 0 1px rgba(255,255,255,.09), 0 8px 20px rgba(0, 13, 29, .17); }
.hud span { display: block; color: var(--muted); font-size: .67rem; font-weight: 700; }
.hud strong { display: block; overflow: hidden; color: #fff9dd; font-size: clamp(.88rem, 3.6vw, 1.15rem); text-overflow: ellipsis; white-space: nowrap; }
.status { min-height: 1.4em; margin: 0 0 8px; color: #d6fffa; font-size: .88rem; font-weight: 750; text-align: center; }
.status[data-mood="good"] { color: #fff0a8; }
.status[data-mood="warning"] { color: #ffc0a4; }

.canvas-wrap { position: relative; width: min(100%, 490px); margin: 0 auto; }
canvas { display: block; width: 100%; height: auto; border: 1px solid rgba(157,255,239,.3); border-radius: 34px 34px 20px 20px; box-shadow: 0 26px 58px rgba(0, 12, 30, .48), inset 0 1px rgba(255,255,255,.18); touch-action: none; user-select: none; }
.overlay { position: absolute; z-index: 4; inset: 0; display: grid; place-items: center; padding: 18px; border-radius: 34px 34px 20px 20px; background: rgba(0, 27, 48, .75); backdrop-filter: blur(6px); }
.overlay[hidden] { display: none; pointer-events: none; }
.overlay-card { width: min(100%, 345px); padding: 28px 24px; border: 1px solid rgba(169,255,241,.3); border-radius: 26px 26px 18px 18px; text-align: center; background: linear-gradient(170deg, #087997, #03405f); box-shadow: 0 25px 65px rgba(0,8,24,.42); }
.overlay-card::before { content: "✦  ◌  ✦"; display: block; margin-bottom: 8px; color: #b8fff1; letter-spacing: .35em; }
.overlay-card h2 { font-size: clamp(1.6rem, 7vw, 2.15rem); }
.overlay-card > p:not(.eyebrow) { color: #d1f4ef; line-height: 1.55; }
.primary { width: 100%; border: 0; color: #163e45; background: linear-gradient(135deg, var(--sand), #b8fff1); font-size: 1.04rem; }
.primary:hover { filter: brightness(1.08); transform: translateY(-2px); }

.tips { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; margin: 13px auto 0; color: var(--muted); font-size: .82rem; }
.tips p { margin: 0; padding: 10px 12px; border: 1px solid var(--edge); border-radius: 14px; background: rgba(0, 41, 66, .48); }

@media (max-width: 520px) {
  .game-shell { padding: 10px 8px 18px; }
  .game-header { align-items: flex-start; }
  .actions { gap: 4px; }
  .actions button { min-height: 40px; padding: 7px 9px; font-size: .7rem; }
  .hud { gap: 4px; }
  .hud div { padding: 7px 2px; border-radius: 10px; }
  .hud span { font-size: .57rem; }
  .tips { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}