:root {
  --bg: #0b0d0e;
  --panel: #121618;
  --line: #1f272a;
  --fg: #d7e0e2;
  --dim: #6b7b80;
  --accent: #34e2ea;
  --win: #6ee787;
  --lose: #ff7b72;
  --mono: ui-monospace, "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background:
    radial-gradient(900px 500px at 50% -10%, #12303380, transparent 70%),
    var(--bg);
  color: var(--fg);
  font-family: var(--mono);
  font-size: 15px;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  justify-content: center;
}

main {
  width: 100%;
  max-width: 620px;
  padding: 3rem 1.25rem 2rem;
}

header { margin-bottom: 2rem; }

h1 {
  font-size: clamp(1.6rem, 6vw, 2.4rem);
  letter-spacing: 0.1em;
  margin: 0 0 0.4rem;
  color: var(--accent);
}

.dim { color: var(--line); }

.tagline { margin: 0; color: var(--dim); }
.tagline strong { color: var(--fg); font-weight: 600; }

#intro p { color: var(--dim); }
#intro em { color: var(--fg); font-style: normal; text-decoration: underline; text-underline-offset: 3px; }
.fine { font-size: 0.85em; border-left: 2px solid var(--line); padding-left: 0.9rem; }

button.primary {
  font-family: inherit;
  font-size: 1rem;
  background: var(--accent);
  color: #04191b;
  border: 0;
  border-radius: 3px;
  padding: 0.65rem 1.4rem;
  cursor: pointer;
  font-weight: 700;
  letter-spacing: 0.04em;
}
button.primary:hover { filter: brightness(1.12); }
button.primary:disabled { background: var(--line); color: var(--dim); cursor: default; filter: none; }

.hud {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.timer {
  font-size: clamp(2rem, 9vw, 3rem);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.pips { display: flex; gap: 5px; }
.pip {
  width: 12px; height: 12px;
  border: 1px solid var(--line);
  border-radius: 2px;
}
.pip.done { background: var(--accent); border-color: var(--accent); }
.pip.current { border-color: var(--accent); animation: blink 1.1s steps(2, end) infinite; }
@keyframes blink { 50% { opacity: 0.25; } }

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 1.25rem;
}

.type { color: var(--dim); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.12em; min-height: 1.2em; }

.prompt { font-size: 1.15rem; margin: 0.6rem 0 1.2rem; }

form { display: flex; gap: 0.6rem; }

input {
  flex: 1;
  min-width: 0;
  font-family: inherit;
  font-size: 1rem;
  background: #0a0e0f;
  border: 1px solid var(--line);
  border-radius: 3px;
  color: var(--fg);
  padding: 0.65rem 0.8rem;
}
input:focus { outline: none; border-color: var(--accent); }
input:disabled { color: var(--dim); }

.pow { margin-top: 0.9rem; font-size: 0.82rem; color: var(--dim); min-height: 1.4em; }
.pow.working::before { content: "▚ "; color: var(--accent); }
.pow.ready::before { content: "✓ "; color: var(--win); }
.pow.error::before { content: "✗ "; color: var(--lose); }

#result h2 { letter-spacing: 0.1em; margin: 0 0 0.3rem; }
#result h2.won { color: var(--win); }
#result h2.lost { color: var(--lose); }

.headline {
  font-size: clamp(2.2rem, 10vw, 3.4rem);
  margin: 0;
  font-variant-numeric: tabular-nums;
}
.sub { color: var(--dim); margin-top: 0.2rem; }

table.splits {
  width: 100%;
  border-collapse: collapse;
  margin: 1.4rem 0;
  font-size: 0.88rem;
}
.splits th {
  text-align: left;
  color: var(--dim);
  font-weight: 400;
  text-transform: uppercase;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  border-bottom: 1px solid var(--line);
  padding: 0.3rem 0;
}
.splits td { padding: 0.28rem 0; border-bottom: 1px solid #161c1e; }
.splits td:last-child { text-align: right; font-variant-numeric: tabular-nums; }

.start-row { display: flex; gap: 0.6rem; flex-wrap: wrap; align-items: center; }
.start-row input { flex: 1 1 12rem; }

.standing {
  margin: 0.9rem 0 0;
  padding: 0.7rem 0.9rem;
  background: #10201f;
  border-left: 2px solid var(--win);
  color: var(--fg);
}

#board { margin-top: 2.5rem; }

.tabs { display: flex; gap: 0.4rem; margin-bottom: 0.9rem; flex-wrap: wrap; }
.tab {
  font-family: inherit;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: transparent;
  color: var(--dim);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 0.35rem 0.8rem;
  cursor: pointer;
}
.tab:hover { color: var(--fg); }
.tab.active { color: var(--accent); border-color: var(--accent); }

.board-body { min-height: 6rem; }
.board-empty { color: var(--dim); font-size: 0.9rem; }
td.rank { color: var(--dim); width: 2.5rem; }

.versus { display: flex; gap: 0.8rem; }
.vs-side {
  flex: 1;
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 1rem;
  text-align: center;
  background: var(--panel);
}
.vs-title { font-size: 0.7rem; letter-spacing: 0.12em; color: var(--dim); }
.vs-time { font-size: 1.8rem; font-variant-numeric: tabular-nums; margin: 0.3rem 0; }
.vs-who { font-size: 0.82rem; color: var(--dim); overflow-wrap: anywhere; }
.vs-human .vs-time { color: var(--win); }
.vs-agent .vs-time { color: var(--accent); }
.vs-gap { color: var(--dim); font-size: 0.88rem; text-align: center; }

footer {
  margin-top: 3rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--line);
  color: var(--dim);
  font-size: 0.82rem;
}
a { color: var(--dim); text-decoration: underline; text-underline-offset: 2px; }
a:hover { color: var(--accent); }