:root {
  color-scheme: dark;
  font-family: 'DM Sans', Arial, sans-serif;
  color: #f5f7fb;
  background: #0d1727;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  --muted: #9eacc1;
  --panel: #152238;
  --line: rgb(198 216 243 / 12%);
  --mint: #62e6bd;
  --gold: #ffc857;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  background: radial-gradient(ellipse at 50% -10%, #203a59 0, #0d1727 55%);
}

button { font: inherit; }

.page {
  width: min(100% - 32px, 1040px);
  margin: 0 auto;
  padding: clamp(24px, 5vw, 56px) 0 28px;
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--mint);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
}

h1, h2 { font-family: 'Space Grotesk', 'DM Sans', sans-serif; }

h1 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 3.3rem);
  line-height: 1.05;
  letter-spacing: -.045em;
}

.intro { margin: 12px 0 0; color: var(--muted); }

.header-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 12px;
}

.identity-panel {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2px 12px;
  min-width: 220px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgb(255 255 255 / 4%);
}

.identity-status,
.identity-account { color: var(--muted); font-size: .76rem; }
.identity-status { grid-column: 1 / -1; color: var(--mint); font-weight: 600; }
.identity-name { font-family: 'Space Grotesk', sans-serif; font-size: .95rem; }
.identity-account { align-self: center; text-align: right; }

.identity-sign-in {
  grid-column: 1 / -1;
  justify-self: start;
  margin-top: 6px;
  padding: 0;
  border: 0;
  color: var(--mint);
  background: transparent;
  font-weight: 700;
  cursor: pointer;
}

.identity-sign-in:hover { text-decoration: underline; }
.identity-sign-in:focus-visible { outline: 2px solid var(--mint); outline-offset: 3px; }

.restart-button {
  flex: 0 0 auto;
  border: 1px solid rgb(98 230 189 / 45%);
  border-radius: 12px;
  padding: 12px 18px;
  color: #071a1b;
  background: var(--mint);
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 8px 24px rgb(28 219 165 / 14%);
  transition: transform .15s ease, filter .15s ease;
}

.restart-button:hover { transform: translateY(-2px); filter: brightness(1.06); }
.restart-button:active { transform: translateY(0); }
.restart-button:focus-visible { outline: 3px solid #fff; outline-offset: 3px; }

.game-panel {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgb(21 34 56 / 90%);
  box-shadow: 0 24px 70px rgb(0 0 0 / 26%);
}

.game-toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--line);
}

.stat-card {
  display: flex;
  align-items: baseline;
  gap: 10px;
  min-width: 112px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgb(255 255 255 / 3%);
}

.stat-label { color: var(--muted); font-size: .85rem; }
.stat-card strong { color: var(--gold); font-family: 'Space Grotesk', sans-serif; font-size: 1.25rem; }

.game-status {
  margin: 0 0 0 auto;
  color: var(--mint);
  font-size: .95rem;
  font-weight: 600;
  text-align: right;
}

.game-status.complete { color: var(--gold); }

.completion-modal {
  position: fixed;
  width: min(90vw, 430px);
  max-width: 430px;
  padding: 34px 30px 30px;
  border: 1px solid rgb(255 200 87 / 35%);
  border-radius: 22px;
  color: #f5f7fb;
  background: linear-gradient(145deg, #1b3048, #132238);
  box-shadow: 0 28px 90px rgb(0 0 0 / 50%);
  text-align: center;
}

.completion-modal::backdrop { background: rgb(5 12 22 / 76%); backdrop-filter: blur(5px); }
.completion-mark {
  display: grid;
  width: 58px;
  height: 58px;
  margin: 0 auto 14px;
  place-items: center;
  border-radius: 50%;
  color: #10251f;
  background: var(--mint);
  font-size: 1.8rem;
  font-weight: 700;
}
.completion-eyebrow { margin: 0 0 8px; color: var(--mint); font-size: .75rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; }
.completion-modal h2 { margin: 0; font-size: clamp(1.5rem, 5vw, 2rem); }
.completion-message { margin: 10px 0 20px; color: var(--muted); line-height: 1.5; }
.final-score { margin: 0 0 22px; color: var(--muted); }
.final-score strong { margin-left: 8px; color: var(--gold); font-family: 'Space Grotesk', sans-serif; font-size: 1.8rem; }
.final-score span { color: #8292a9; }
.play-again-button {
  width: 100%;
  border: 0;
  border-radius: 12px;
  padding: 13px 18px;
  color: #071a1b;
  background: var(--mint);
  font-weight: 700;
  cursor: pointer;
}
.play-again-button:hover { filter: brightness(1.06); }
.play-again-button:focus-visible,
.completion-close:focus-visible { outline: 3px solid #fff; outline-offset: 3px; }
.completion-close {
  position: absolute;
  top: 10px;
  right: 12px;
  width: 34px;
  height: 34px;
  border: 0;
  border-radius: 50%;
  color: var(--muted);
  background: transparent;
  font-size: 1.5rem;
  cursor: pointer;
}
.completion-close:hover { color: #fff; background: rgb(255 255 255 / 8%); }

.game-container {
  position: relative;
  width: 100%;
  height: clamp(360px, 58vw, 560px);
  overflow: hidden;
  background: linear-gradient(180deg, #152b45, #101d30);
  touch-action: none;
}

.game-container canvas { display: block; width: 100%; height: 100%; }

.loading-message {
  position: absolute;
  inset: 50% auto auto 50%;
  z-index: 1;
  margin: 0;
  transform: translate(-50%, -50%);
  color: var(--muted);
  text-align: center;
  max-width: min(90%, 460px);
  line-height: 1.5;
  white-space: pre-line;
}

.game-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding: 18px 22px 22px;
}

.game-footer h2 { margin: 0 0 6px; font-size: 1rem; }
.game-footer p { margin: 0; color: var(--muted); font-size: .9rem; line-height: 1.7; }
kbd {
  display: inline-block;
  min-width: 24px;
  margin: 0 2px;
  padding: 1px 6px;
  border: 1px solid rgb(198 216 243 / 24%);
  border-radius: 5px;
  color: #e8eff9;
  background: rgb(255 255 255 / 6%);
  font: 600 .78rem 'DM Sans', sans-serif;
  text-align: center;
}

.desktop-note { color: #72839c; font-size: .8rem; }
.page-footer { padding-top: 18px; color: #72839c; font-size: .82rem; text-align: center; }

@media (max-width: 620px) {
  .page-header { align-items: flex-start; flex-direction: column; }
  .header-actions { align-items: flex-start; width: 100%; }
  .identity-panel { width: min(100%, 360px); }
  .restart-button { align-self: flex-start; }
  .game-panel { border-radius: 16px; }
  .game-toolbar { flex-wrap: wrap; padding: 14px; }
  .stat-card { flex: 1 1 120px; min-width: 0; justify-content: space-between; }
  .game-status { flex: 1 0 100%; margin: 2px 0 0; text-align: left; }
  .game-container { height: 62vh; min-height: 340px; max-height: 500px; }
  .game-footer { align-items: flex-start; flex-direction: column; padding: 16px; }
  .desktop-note { display: none; }
}

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