:root {
  --ink: #102033;
  --foam: #e9fbff;
  --sun: #ffcf6f;
  --signal: #ff5c3f;
  --deep: #06324a;
  --sea1: #0c6e8e;
  --sea2: #054f74;
  --panel: rgba(255, 255, 255, 0.78);
  --shadow: 0 24px 80px rgba(3, 20, 35, 0.28);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
  background: radial-gradient(circle at 12% 8%, rgba(255, 207, 111, 0.65), transparent 24rem), linear-gradient(150deg, #e7f6f1 0%, #b6dfe6 42%, #0d4c67 100%);
}
.game-shell { width: min(1180px, calc(100vw - 28px)); margin: 0 auto; padding: 16px 0 28px; }
.hud { position: relative; display: grid; grid-template-columns: minmax(250px, 0.42fr) minmax(520px, 1fr); gap: 14px; align-items: end; margin-bottom: 12px; }
.title-block { align-self: center; }
.eyebrow { margin: 0 0 5px; color: #7d3d1f; font: 800 0.78rem/1.1 "Trebuchet MS", Verdana, sans-serif; letter-spacing: 0.16em; text-transform: uppercase; }
h1 { margin: 0; font-size: clamp(1.65rem, 3.8vw, 3.15rem); line-height: 0.92; max-width: 420px; text-wrap: balance; }
button.help-button { all: unset; position: absolute; right: 0; top: 0; display: grid; place-items: center; width: 38px; height: 38px; border-radius: 50%; border: 2px solid rgba(255,255,255,0.86); color: #102033; background: rgba(255,255,255,0.82); box-shadow: 0 12px 34px rgba(3,20,35,0.22); font: 900 1.25rem/1 "Trebuchet MS", Verdana, sans-serif; cursor: pointer; }
.intel-grid { display: grid; grid-template-columns: 1.25fr 1fr 1fr 1fr; gap: 10px; padding-right: 50px; }
.intel-grid div, .status-panel, .explain { background: var(--panel); border: 1px solid rgba(255, 255, 255, 0.78); box-shadow: var(--shadow); backdrop-filter: blur(14px); }
.intel-grid div { min-height: 66px; padding: 11px 14px; border-radius: 18px; }
.intel-grid div:first-child { background: rgba(255, 247, 209, 0.9); border-color: rgba(255, 207, 111, 0.9); }
.intel-grid div:first-child strong { font-size: 1.18rem; }
.intel-grid span, .status-panel span { display: block; margin-bottom: 3px; color: rgba(16, 32, 51, 0.64); font: 800 0.62rem/1.2 "Trebuchet MS", Verdana, sans-serif; letter-spacing: 0.08em; text-transform: uppercase; }
.intel-grid strong { font: 800 1rem/1.2 "Trebuchet MS", Verdana, sans-serif; overflow-wrap: anywhere; }
.status-panel strong { font: 900 .88rem/1.1 "Trebuchet MS", Verdana, sans-serif; overflow-wrap: anywhere; }
.ocean-card { position: relative; overflow: hidden; border-radius: 30px; border: 8px solid rgba(255, 255, 255, 0.42); box-shadow: 0 40px 110px rgba(1, 31, 52, 0.38); background: var(--deep); }
canvas { display: block; width: 100%; aspect-ratio: 16 / 9; background: linear-gradient(#a9e7f2 0 28%, var(--sea1) 28% 60%, var(--sea2) 100%); }
.status-panel { position: absolute; right: 14px; bottom: 14px; width: min(210px, calc(100% - 28px)); display: grid; grid-template-columns: 1fr; gap: 3px; padding: 7px 9px; border-radius: 14px; }
.status-panel div { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; padding: 2px 4px; }
.explain { position: fixed; z-index: 5; right: max(18px, calc((100vw - 1180px) / 2)); top: 88px; width: min(520px, calc(100vw - 36px)); padding: 22px 24px; border-radius: 24px; font-size: 1.05rem; }
.close-help { position: absolute; top: 12px; right: 14px; width: 34px; height: 34px; border: 0; border-radius: 50%; background: #102033; color: white; font-size: 1.25rem; cursor: pointer; }
.explain h2 { margin: 0 42px 8px 0; }
.explain p { margin: 0 0 10px; }
.explain .small { color: rgba(16, 32, 51, 0.67); font-size: 0.95rem; }
@media (max-width: 900px) {
  .hud { grid-template-columns: 1fr; }
  h1 { font-size: clamp(2.05rem, 11vw, 3.7rem); }
  .intel-grid { grid-template-columns: 1fr 1fr; padding-right: 0; }
  .help-button { top: 4px; }
}
@media (max-width: 620px) {
  .game-shell { width: min(100vw - 16px, 1180px); padding-top: 16px; }
  .intel-grid { grid-template-columns: 1fr; }
  .status-panel { width: min(190px, calc(100% - 20px)); right: 10px; bottom: 10px; padding: 6px; }
  .status-panel strong { font-size: 0.86rem; }
}