* { box-sizing: border-box; }

:root {
  --a: #f85149;  /* ID    — red   */
  --b: #d29922;  /* class — amber */
  --c: #58a6ff;  /* type  — blue  */
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;
  background: #0d1117;
  color: #c9d1d9;
  line-height: 1.6;
}

.topbar {
  padding: 24px 16px 16px;
  text-align: center;
  background: linear-gradient(135deg, #161b22 0%, #0d1117 100%);
  border-bottom: 1px solid #30363d;
}
.topbar h1 { margin: 0; font-size: 1.5rem; font-weight: 600; }
.topbar .sub { margin: 6px auto 0; font-size: 0.85rem; color: #8b949e; max-width: 640px; }
.topbar code { font-family: ui-monospace, monospace; font-size: 0.85em; color: #c9d1d9; }

main { max-width: 760px; margin: 0 auto; padding: 16px; }

.panel, .about {
  background: #161b22;
  border: 1px solid #30363d;
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 16px;
}

label { display: block; font-size: 0.8rem; color: #8b949e; margin-bottom: 8px; }

textarea {
  width: 100%;
  background: #0d1117;
  border: 1px solid #30363d;
  color: #c9d1d9;
  border-radius: 6px;
  padding: 12px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.95rem;
  line-height: 1.7;
  resize: vertical;
}
textarea:focus { outline: none; border-color: #58a6ff; }

.hint { margin: 10px 0 0; font-size: 0.78rem; color: #8b949e; }

/* result cards */
.card {
  background: #161b22;
  border: 1px solid #30363d;
  border-radius: 8px;
  padding: 14px 16px;
  margin-bottom: 12px;
}
.card.is-winner { border-color: #3fb950; box-shadow: 0 0 0 1px #12351f inset; }

.card-top {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; flex-wrap: wrap;
}
.sel {
  font-family: ui-monospace, monospace; font-size: 0.95rem; color: #e6edf3;
  word-break: break-all;
}
.score { display: flex; align-items: center; gap: 10px; }

/* (a,b,c) chip */
.chip { display: inline-flex; border-radius: 6px; overflow: hidden; border: 1px solid #30363d; }
.seg {
  font-family: ui-monospace, monospace; font-weight: 700; font-size: 1rem;
  padding: 4px 11px; color: #0d1117;
}
.seg-a { background: var(--a); }
.seg-b { background: var(--b); }
.seg-c { background: var(--c); }

.winner { color: #3fb950; font-size: 0.8rem; font-weight: 600; }
.tie { color: #8b949e; font-size: 0.8rem; }

/* token breakdown */
.bd { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.token {
  display: inline-flex; align-items: center; gap: 6px;
  border: 1px solid #30363d; border-radius: 6px; padding: 3px 8px;
  font-size: 0.85rem; background: #0d1117;
}
.token code { font-family: ui-monospace, monospace; color: #e6edf3; }
.token .tval { font-family: ui-monospace, monospace; font-size: 0.78rem; color: #8b949e; }
.token.k-a { border-color: var(--a); }
.token.k-a .tval { color: var(--a); }
.token.k-b { border-color: var(--b); }
.token.k-b .tval { color: var(--b); }
.token.k-c { border-color: var(--c); }
.token.k-c .tval { color: var(--c); }
.token.k-zero { opacity: 0.55; }
.bd-empty { margin-top: 10px; font-size: 0.82rem; color: #8b949e; }

.empty { color: #8b949e; }

/* about */
.about h2 { margin: 18px 0 8px; font-size: 1.05rem; }
.about h2:first-child { margin-top: 0; }
.about p, .about ul { font-size: 0.9rem; }
.about li { margin-bottom: 3px; }
.about code {
  font-family: ui-monospace, monospace; font-size: 0.82em;
  background: #21262d; padding: 1px 5px; border-radius: 3px;
}
.buckets { width: 100%; border-collapse: collapse; font-size: 0.88rem; margin: 8px 0 12px; }
.buckets th { text-align: left; padding: 6px 8px; color: #8b949e; border-bottom: 1px solid #30363d; }
.buckets td { padding: 7px 8px; border-bottom: 1px solid #1c2331; vertical-align: top; }
.dim { color: #8b949e; font-size: 0.85rem; }

footer {
  border-top: 1px solid #30363d; padding: 16px; text-align: center;
  font-size: 0.85rem; color: #8b949e; display: flex; justify-content: space-between;
  flex-wrap: wrap; gap: 8px; max-width: 760px; margin: 24px auto 0;
}
footer a, .about a { color: #58a6ff; }