:root {
  color-scheme: dark;
  --bg: #05030f;
  --bg-soft: #0d0824;
  --panel: rgba(19, 12, 43, 0.72);
  --line: rgba(124, 249, 255, 0.18);
  --cyan: #38f2ff;
  --magenta: #ff4fd8;
  --amber: #ffd166;
  --text: #e8f2ff;
  --muted: #9aa8c7;
  --danger: #ff5470;
  --radius: 14px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: "Chakra Petch", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-text-size-adjust: 100%;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(60vw 60vw at 15% 0%, rgba(255, 79, 216, 0.18), transparent 60%),
    radial-gradient(70vw 70vw at 85% 10%, rgba(56, 242, 255, 0.16), transparent 60%),
    linear-gradient(180deg, #0a0620 0%, #05030f 60%);
  pointer-events: none;
  z-index: -1;
}

.app {
  max-width: 1120px;
  margin: 0 auto;
  padding: 18px clamp(12px, 3vw, 28px) 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-height: 100vh;
}

/* ---------- masthead ---------- */
.masthead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand { display: flex; align-items: center; gap: 12px; }

.brand__mark {
  width: 38px; height: 38px;
  border-radius: 11px;
  background: linear-gradient(135deg, var(--cyan), var(--magenta));
  box-shadow: 0 0 24px rgba(56, 242, 255, 0.45);
  position: relative;
  flex: none;
}
.brand__mark::after {
  content: "";
  position: absolute; inset: 9px;
  background: var(--bg);
  clip-path: polygon(50% 0%, 100% 100%, 50% 76%, 0% 100%);
}

.brand__title {
  margin: 0;
  font-size: clamp(1.35rem, 3.6vw, 1.9rem);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  line-height: 1;
}
.brand__title span {
  background: linear-gradient(90deg, var(--cyan), var(--magenta));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.brand__sub {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
}

.icon-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--text);
  font: inherit;
  font-size: 0.85rem;
  cursor: pointer;
  transition: border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}
.icon-button:hover { border-color: var(--cyan); box-shadow: 0 0 18px rgba(56, 242, 255, 0.25); }
.icon-button:active { transform: translateY(1px); }
.icon-button[aria-pressed="true"] { color: var(--muted); border-color: rgba(255, 84, 112, 0.5); }
.icon-button__glyph { font-size: 1rem; }

/* ---------- layout ---------- */
.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 18px;
  align-items: start;
}

.stage-wrap { display: flex; flex-direction: column; gap: 10px; min-width: 0; }

.hud {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  backdrop-filter: blur(8px);
}
.hud__cell { display: flex; flex-direction: column; gap: 2px; }
.hud__cell--right { align-items: flex-end; }
.hud__cell--wave { align-items: center; }
.hud__label {
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}
.hud__value {
  font-size: clamp(1.1rem, 2.6vw, 1.5rem);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
  text-shadow: 0 0 14px rgba(56, 242, 255, 0.5);
}
.hud__value.is-bump { animation: bump 0.25s ease; }
@keyframes bump { 0% { transform: scale(1); } 45% { transform: scale(1.18); } 100% { transform: scale(1); } }
.hud__value.is-hurt { color: var(--danger); text-shadow: 0 0 14px rgba(255, 84, 112, 0.7); }

.stage {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.6), inset 0 0 60px rgba(56, 242, 255, 0.05);
  background: #05030f;
  aspect-ratio: 2 / 3;
  max-height: calc(100vh - 210px);
  margin: 0 auto;
  width: 100%;
  max-width: min(100%, calc((100vh - 210px) * 2 / 3));
}
canvas { display: block; width: 100%; height: 100%; touch-action: none; }

/* ---------- overlay ---------- */
.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 18px;
  background: linear-gradient(180deg, rgba(5, 3, 15, 0.72), rgba(5, 3, 15, 0.92));
  backdrop-filter: blur(3px);
  transition: opacity 0.25s ease;
}
.overlay[hidden] { display: none; }

.overlay__panel {
  width: min(360px, 100%);
  text-align: center;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(10, 6, 26, 0.86);
  padding: 22px 20px;
  box-shadow: 0 0 50px rgba(255, 79, 216, 0.18);
  animation: rise 0.3s ease;
}
@keyframes rise { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

.overlay__eyebrow {
  margin: 0 0 6px;
  font-size: 0.68rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--cyan);
}
.overlay__title {
  margin: 0 0 10px;
  font-size: 1.6rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.overlay__text { margin: 0 0 16px; color: var(--muted); font-size: 0.9rem; line-height: 1.5; }
.overlay__score { margin-bottom: 14px; }
.overlay__score-label {
  display: block;
  font-size: 0.66rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}
.overlay__score-value {
  font-size: 2.4rem;
  font-variant-numeric: tabular-nums;
  background: linear-gradient(90deg, var(--cyan), var(--magenta));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

kbd {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 5px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.06);
  font: inherit;
  font-size: 0.78em;
  color: var(--text);
}

.button {
  font: inherit;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 10px;
  border: 1px solid transparent;
  padding: 11px 20px;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.2s ease, filter 0.2s ease;
}
.button:active { transform: translateY(1px); }
.button:disabled { opacity: 0.55; cursor: not-allowed; }
.button--primary {
  width: 100%;
  color: #04121a;
  background: linear-gradient(120deg, var(--cyan), #9df9ff);
  box-shadow: 0 0 26px rgba(56, 242, 255, 0.4);
}
.button--primary:hover:not(:disabled) { filter: brightness(1.08); }
.button--accent {
  color: #1a0416;
  background: linear-gradient(120deg, var(--magenta), #ffa6ec);
  box-shadow: 0 0 22px rgba(255, 79, 216, 0.35);
  white-space: nowrap;
}

.submit-form { margin-top: 16px; border-top: 1px solid var(--line); padding-top: 14px; text-align: left; }
.submit-form[hidden] { display: none; }
.submit-form__label {
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 8px;
}
.submit-form__row { display: flex; gap: 8px; }
.input {
  flex: 1 1 auto;
  min-width: 0;
  font: inherit;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
}
.input:focus-visible { outline: 2px solid var(--cyan); outline-offset: 1px; }
.input[aria-invalid="true"] { border-color: var(--danger); }

.status { margin: 8px 0 0; min-height: 1.1em; font-size: 0.8rem; color: var(--muted); }
.status[data-tone="error"] { color: var(--danger); }
.status[data-tone="success"] { color: #6ef2b0; }

:focus-visible { outline: 2px solid var(--cyan); outline-offset: 2px; }

/* ---------- side panels ---------- */
.side { display: flex; flex-direction: column; gap: 14px; min-width: 0; }
.panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 14px 16px;
  backdrop-filter: blur(8px);
}
.panel--muted { color: var(--muted); }
.panel__head { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; }
.panel__title {
  margin: 0 0 10px;
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}
.panel__foot { margin: 10px 0 0; font-size: 0.75rem; color: var(--muted); min-height: 1em; }
.panel__foot[data-tone="error"] { color: var(--danger); }

.link-button {
  background: none;
  border: 0;
  color: var(--muted);
  font: inherit;
  font-size: 0.75rem;
  text-decoration: underline;
  cursor: pointer;
  padding: 0;
}
.link-button:hover { color: var(--cyan); }

.board { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 2px; }
.board__row {
  display: grid;
  grid-template-columns: 26px 1fr auto;
  gap: 10px;
  align-items: center;
  padding: 7px 8px;
  border-radius: 8px;
  font-size: 0.9rem;
  background: rgba(255, 255, 255, 0.02);
}
.board__row:nth-child(1) { background: rgba(255, 209, 102, 0.12); }
.board__row:nth-child(2) { background: rgba(56, 242, 255, 0.08); }
.board__row:nth-child(3) { background: rgba(255, 79, 216, 0.08); }
.board__row.is-new { animation: flash 1.4s ease; }
@keyframes flash {
  0%, 40% { box-shadow: 0 0 0 1px var(--cyan); background: rgba(56, 242, 255, 0.22); }
  100% { box-shadow: none; }
}
.board__rank { color: var(--muted); font-variant-numeric: tabular-nums; }
.board__name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.board__score { font-variant-numeric: tabular-nums; color: var(--amber); font-weight: 700; }
.board__state { padding: 12px 8px; color: var(--muted); font-size: 0.85rem; }
.board__state--error { color: var(--danger); }

.keylist { margin: 0; padding-left: 18px; font-size: 0.83rem; line-height: 1.9; }

/* ---------- touch ---------- */
.touch {
  display: none;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  padding: 10px 6px calc(10px + env(safe-area-inset-bottom));
  user-select: none;
  -webkit-user-select: none;
}
.touch__pad { display: flex; align-items: center; gap: 8px; }
.touch__stack { display: flex; flex-direction: column; gap: 8px; }
.touch__btn {
  width: 58px; height: 52px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(19, 12, 43, 0.9);
  color: var(--cyan);
  font: inherit;
  font-size: 1.05rem;
  touch-action: none;
  cursor: pointer;
}
.touch__btn.is-active { background: rgba(56, 242, 255, 0.24); color: #fff; }
.touch__btn--fire {
  width: 96px; height: 96px;
  border-radius: 50%;
  color: var(--magenta);
  border-color: rgba(255, 79, 216, 0.5);
  font-weight: 700;
  letter-spacing: 0.1em;
  box-shadow: 0 0 24px rgba(255, 79, 216, 0.25);
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .layout { grid-template-columns: minmax(0, 1fr); }
  .stage { max-height: none; max-width: 100%; }
}

@media (pointer: coarse), (max-width: 720px) {
  .touch { display: flex; }
  .stage { max-height: 62vh; }
  .brand__sub { display: none; }
  .icon-button__label { display: none; }
  .icon-button { padding: 10px 12px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
}