:root {
  color-scheme: dark;
  --bg: #11161c;
  --panel: #17202a;
  --panel-2: #22313d;
  --ink: #f7f1e6;
  --muted: #b8c0c7;
  --lime: #9ae66e;
  --cyan: #53d2c6;
  --rose: #ff6b8b;
  --amber: #ffd166;
  --line: rgba(255, 255, 255, 0.16);
  --shadow: 0 18px 42px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

body {
  min-height: 100svh;
  background:
    linear-gradient(118deg, rgba(83, 210, 198, 0.16), transparent 36%),
    linear-gradient(304deg, rgba(255, 107, 139, 0.14), transparent 34%),
    linear-gradient(180deg, #11161c, #0d1116);
}

button,
a {
  font: inherit;
}

.pr-bar {
  padding: 7px 12px;
  background: #090d12;
  color: #d8d1c3;
  font-size: 12px;
  text-align: center;
  border-bottom: 1px solid var(--line);
}

.app {
  width: min(100%, 930px);
  min-height: calc(100svh - 31px);
  margin: 0 auto;
  padding: 18px clamp(12px, 3vw, 28px) 22px;
  display: grid;
  grid-template-rows: auto auto 1fr auto auto;
  gap: 14px;
}

.topline,
.scoreboard,
.playfield,
.controls,
.support-strip,
.result {
  border: 1px solid var(--line);
  background: rgba(17, 22, 28, 0.88);
  box-shadow: var(--shadow);
}

.topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 16px;
  border-radius: 8px;
}

.eyebrow {
  margin: 0 0 5px;
  color: var(--amber);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(27px, 5vw, 36px);
  line-height: 1.05;
}

.hub-link,
.support-strip a {
  color: var(--ink);
  text-decoration: none;
}

.hub-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 64px;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-2);
  font-weight: 800;
}

.scoreboard {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border-radius: 8px;
}

.scoreboard div {
  min-width: 0;
  padding: 10px;
  background: var(--panel);
}

.scoreboard span {
  display: block;
  color: var(--muted);
  font-size: 11px;
  font-weight: 800;
}

.scoreboard strong {
  display: block;
  margin-top: 3px;
  font-size: 22px;
  line-height: 1;
}

.playfield {
  min-height: 0;
  border-radius: 8px;
  padding: clamp(12px, 3vw, 20px);
  display: grid;
  grid-template-columns: minmax(190px, 0.72fr) minmax(280px, 1.28fr);
  grid-template-rows: minmax(0, 1fr) auto auto;
  gap: 16px;
  align-items: stretch;
}

.target-panel,
.board-wrap {
  min-width: 0;
}

.target-panel {
  display: grid;
  align-content: center;
  gap: 10px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.panel-label {
  color: var(--amber);
  font-size: 12px;
  font-weight: 900;
}

.target-panel strong {
  min-height: 34px;
  font-size: clamp(22px, 4vw, 30px);
  line-height: 1;
}

.target-panel p {
  min-height: 44px;
  margin: 0;
  color: var(--muted);
  font-weight: 700;
}

.charges {
  color: var(--rose);
  font-size: 22px;
  letter-spacing: 4px;
}

.target-grid {
  width: min(100%, 160px);
  aspect-ratio: 1;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 5px;
}

.target-dot {
  border-radius: 7px;
  border: 1px solid var(--line);
  background: #0f171f;
}

.target-dot.on {
  background: var(--amber);
  box-shadow: 0 0 14px rgba(255, 209, 102, 0.42);
}

.board-wrap {
  display: grid;
  align-items: center;
}

.pulse-grid {
  width: min(100%, 470px);
  aspect-ratio: 1;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.pulse-cell {
  min-width: 0;
  min-height: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #16222c;
  color: var(--ink);
  display: grid;
  place-items: center;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.pulse-cell:enabled:hover,
.pulse-cell:enabled:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}

.pulse-cell:disabled {
  cursor: default;
  color: #7d878f;
}

.pulse-cell::before {
  content: "";
  width: 42%;
  aspect-ratio: 1;
  border-radius: 999px;
  border: 2px solid rgba(247, 241, 230, 0.34);
  background: #0e141a;
}

.pulse-cell.on {
  background: #213542;
}

.pulse-cell.on::before {
  border-color: transparent;
  background: linear-gradient(135deg, var(--lime), var(--cyan));
  box-shadow: 0 0 20px rgba(154, 230, 110, 0.5);
}

.pulse-cell.just-touched {
  border-color: var(--rose);
}

.feedback,
.viewport-state {
  grid-column: 1 / -1;
  margin: 0;
}

.feedback {
  min-height: 26px;
  color: var(--ink);
  font-weight: 800;
}

.viewport-state {
  color: var(--muted);
  font-size: 12px;
}

.controls,
.support-strip {
  border-radius: 8px;
  padding: 12px;
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

button,
.support-strip a {
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-2);
  color: var(--ink);
  padding: 10px 16px;
  font-weight: 900;
}

button {
  cursor: pointer;
}

button:disabled {
  cursor: default;
  opacity: 0.48;
}

button.primary {
  background: linear-gradient(135deg, var(--rose), var(--amber));
  color: #160d10;
  border-color: transparent;
}

.result {
  position: fixed;
  inset: auto 14px 14px;
  z-index: 5;
  max-width: 520px;
  margin: 0 auto;
  padding: 18px;
  border-radius: 8px;
  text-align: center;
  left: 50%;
  transform: translateX(-50%);
}

.result[hidden] {
  display: none;
}

.result-label {
  margin: 0 0 4px;
  color: var(--amber);
  font-size: 12px;
  font-weight: 900;
}

.result strong {
  display: block;
  font-size: 44px;
  line-height: 1;
}

.result p {
  margin: 8px 0 14px;
  color: var(--muted);
  font-weight: 700;
}

@media (max-width: 720px) {
  .app {
    min-height: calc(100svh - 31px);
    padding: 12px;
  }

  .topline {
    align-items: flex-start;
  }

  .scoreboard strong {
    font-size: 19px;
  }

  .playfield {
    grid-template-columns: 1fr;
    grid-template-rows: auto minmax(0, 1fr) auto auto;
  }

  .target-panel {
    grid-template-columns: 1fr auto;
    align-items: center;
  }

  .panel-label,
  .target-panel strong,
  .target-panel p,
  .charges {
    grid-column: 1;
  }

  .target-grid {
    grid-column: 2;
    grid-row: 1 / span 4;
    width: 112px;
  }
}

@media (max-width: 480px) {
  .topline {
    padding: 12px;
  }

  .hub-link {
    min-width: 54px;
    min-height: 38px;
  }

  .scoreboard div {
    padding: 8px 6px;
  }

  .scoreboard span {
    font-size: 10px;
  }

  .scoreboard strong {
    font-size: 17px;
  }

  .playfield {
    gap: 12px;
    padding: 12px;
  }

  .pulse-grid {
    gap: 6px;
  }

  .target-panel {
    grid-template-columns: 1fr;
  }

  .target-grid {
    grid-column: 1;
    grid-row: auto;
    width: 120px;
  }

  button,
  .support-strip a {
    flex: 1 1 116px;
    padding: 10px;
  }
}