:root {
  --bg: #070611;
  --panel: #151126;
  --panel-alt: #1c1731;
  --line: #41376a;
  --text: #f3eeff;
  --muted: #b6afd5;
  --cyan: #66e9ff;
  --amber: #ffc568;
  --pink: #ff6fd3;
  --good: #7cff9c;
  --bad: #ff7f8f;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Trebuchet MS", "Verdana", system-ui, sans-serif;
  color: var(--text);
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at 15% 0%, rgba(102, 233, 255, 0.16), transparent 44%),
    radial-gradient(circle at 85% 0%, rgba(255, 111, 211, 0.18), transparent 45%),
    var(--bg);
  padding: 18px 12px;
}

.app {
  width: min(900px, 100%);
  background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.015));
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 18px;
  position: relative;
  box-shadow: 0 20px 52px rgba(0, 0, 0, 0.48);
}

.back {
  color: #95e3ff;
  text-decoration: none;
  font-size: 0.95rem;
}

h1 {
  margin: 8px 0 6px;
  font-size: clamp(1.35rem, 3vw, 2.1rem);
  letter-spacing: 0.05em;
}

.topbar p {
  margin: 0 0 14px;
  color: var(--muted);
}

.hud {
  display: grid;
  grid-template-columns: repeat(6, minmax(90px, 1fr));
  gap: 10px;
}

.hud > div {
  background: rgba(12, 10, 24, 0.92);
  border: 1px solid #3f3666;
  border-radius: 10px;
  padding: 10px;
  display: grid;
  gap: 3px;
}

.label {
  color: #a9a0c8;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

strong {
  font-size: 1.12rem;
}

.board {
  margin-top: 12px;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 12px;
}

.incoming,
.rules,
.log {
  background: rgba(14, 11, 28, 0.95);
  border: 1px solid #3f3567;
  border-radius: 12px;
  padding: 14px;
}

.incoming-label {
  color: #a9a0ca;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.76rem;
}

.incoming-number {
  margin-top: 6px;
  font-size: clamp(1.55rem, 5vw, 2.6rem);
  letter-spacing: 0.09em;
  color: var(--amber);
  text-shadow: 0 0 10px rgba(255, 197, 104, 0.35);
}

.incoming-meta {
  margin-top: 6px;
  color: var(--muted);
}

.timer-track {
  margin-top: 14px;
  width: 100%;
  height: 12px;
  border-radius: 999px;
  background: #231c3f;
  overflow: hidden;
  border: 1px solid #4f4583;
}

.timer-fill {
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, #7cff9c, #ffc568, #ff7f8f);
  transform-origin: left center;
}

.rules h2 {
  margin: 0;
  font-size: 1.06rem;
  letter-spacing: 0.04em;
}

.rules p {
  margin: 8px 0 10px;
  color: #cdc5eb;
  font-size: 0.93rem;
}

.rules ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.rules li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  background: var(--panel-alt);
  border: 1px solid #4a3f79;
  border-radius: 8px;
  padding: 8px 10px;
}

.rules code {
  color: var(--cyan);
  font-weight: 700;
}

.controls {
  margin-top: 12px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

button {
  border: 1px solid #4f4580;
  border-radius: 10px;
  background: #1d1634;
  color: #f3eeff;
  font: inherit;
  font-weight: 700;
  padding: 12px 10px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

button:hover {
  filter: brightness(1.08);
}

button.active {
  outline: 2px solid var(--cyan);
  box-shadow: 0 0 0 2px rgba(102, 233, 255, 0.16) inset;
}

.primary {
  justify-content: center;
  background: linear-gradient(180deg, #84f5ff, #47c7f8);
  color: #042338;
  border-color: #aff3ff;
}

.ghost {
  background: rgba(29, 22, 52, 0.8);
}

kbd {
  border: 1px solid #6f62a8;
  border-radius: 6px;
  padding: 2px 6px;
  font: inherit;
  font-size: 0.85rem;
  color: #e4dbff;
  background: rgba(255, 255, 255, 0.04);
}

.tip {
  margin: 12px 2px;
  color: #b8aed8;
  font-size: 0.92rem;
}

.log {
  margin-top: 10px;
}

.log h3 {
  margin: 0 0 10px;
  color: #d8d0f4;
}

#logList {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 6px;
}

#logList li {
  font-family: "Consolas", "Menlo", monospace;
  font-size: 0.88rem;
  color: #d2c9f0;
  background: #1a1430;
  border: 1px solid #40356d;
  border-radius: 7px;
  padding: 6px 8px;
}

#logList li.good { color: var(--good); }
#logList li.bad { color: var(--bad); }

.overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(9, 8, 20, 0.5), rgba(9, 8, 20, 0.86));
  border-radius: 18px;
  display: grid;
  place-content: center;
  text-align: center;
  gap: 12px;
  padding: 16px;
}

.overlay.hidden {
  display: none;
}

.overlay h2 {
  margin: 0;
  letter-spacing: 0.05em;
}

.overlay p {
  margin: 0;
  max-width: 560px;
  color: #dbd3f5;
}

@media (max-width: 760px) {
  .hud {
    grid-template-columns: repeat(3, minmax(90px, 1fr));
  }

  .board {
    grid-template-columns: 1fr;
  }

  .controls {
    grid-template-columns: 1fr 1fr;
  }
}