/* Oddity Arena — Anthropic-inspired warm theme */

:root {
  --bg: #faf9f5;
  --bg-card: #ffffff;
  --bg-hover: #f0eee6;
  --bg-subtle: #f5f4ef;
  --text: #141413;
  --text-dim: #87867f;
  --text-mid: #3d3d3a;
  --accent: #c6613f;
  --accent-hover: #d97757;
  --accent-light: rgba(198, 97, 63, 0.1);
  --gold: #c6613f;
  --easy: #3d8c5c;
  --medium: #b8860b;
  --hard: #c6613f;
  --border: #e8e6dc;
  --border-strong: #d3d1c7;
  --font: Georgia, "Times New Roman", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.7;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ── Layout ── */
.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }
.section { padding: 64px 0; }

/* ── Typography ── */
h1 { font-size: 3.2em; font-weight: 400; letter-spacing: -0.02em; line-height: 1.1; }
h2 { font-size: 2em; font-weight: 400; margin-bottom: 16px; letter-spacing: -0.01em; }
h3 { font-size: 1.15em; font-weight: 600; font-family: var(--font-sans); }
p { font-size: 1.05em; }
.subtitle { color: var(--text-dim); font-size: 1.15em; margin-top: 12px; font-style: italic; }
.brand-cn {
  font-size: 0.35em;
  color: var(--text-dim);
  font-weight: 400;
  display: block;
  margin-top: 8px;
  letter-spacing: 0.3em;
}

/* ── Cards ── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  transition: all 0.2s;
}
.card:hover { border-color: var(--border-strong); box-shadow: 0 2px 12px rgba(0,0,0,0.06); transform: translateY(-1px); }
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 20px; }

/* ── Tags ── */
.tag {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 20px;
  font-size: 0.72em;
  font-weight: 600;
  font-family: var(--font-sans);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.tag-easy { background: rgba(61,140,92,0.1); color: var(--easy); }
.tag-medium { background: rgba(184,134,11,0.1); color: var(--medium); }
.tag-hard { background: var(--accent-light); color: var(--hard); }
.tag-category { background: var(--bg-subtle); color: var(--text-dim); }
.tag-coming { background: var(--bg-subtle); color: var(--text-dim); font-style: italic; }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 0.95em;
  font-weight: 600;
  font-family: var(--font-sans);
  border: none;
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
  color: inherit;
}
.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-vote {
  background: transparent;
  border: 2px solid var(--accent);
  color: var(--accent);
  padding: 14px 32px;
  font-size: 1.05em;
  width: 100%;
  justify-content: center;
  border-radius: 10px;
}
.btn-vote:hover { background: var(--accent); color: white; }
.btn-vote.selected { background: var(--accent); color: white; pointer-events: none; }
.btn-secondary { background: var(--bg-subtle); color: var(--text-mid); border: 1px solid var(--border); }
.btn-secondary:hover { border-color: var(--border-strong); background: var(--bg-hover); }

/* ── Progress bar ── */
.progress-bar {
  display: flex;
  height: 36px;
  border-radius: 10px;
  overflow: hidden;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
}
.progress-fill {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85em;
  font-weight: 600;
  font-family: var(--font-sans);
  transition: width 0.6s ease;
  min-width: 60px;
}
.progress-a { background: var(--accent); color: white; }
.progress-b { background: #e3dac0; color: var(--text); }

/* ── Battle layout ── */
.battle-header { text-align: center; padding: 40px 0 20px; }
.battle-arena { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin: 20px 0; }
.battle-side { display: flex; flex-direction: column; gap: 12px; }
.battle-label {
  text-align: center;
  font-size: 1.3em;
  font-weight: 400;
  color: var(--text-dim);
  padding: 8px;
  font-family: var(--font);
}
.battle-label.revealed { color: var(--text); font-weight: 600; font-family: var(--font-sans); animation: revealSlide 0.5s ease; }
.battle-iframe {
  width: 100%;
  height: 500px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: white;
}
.battle-iframe.winner { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-light); }
.battle-actions { display: flex; gap: 12px; justify-content: center; padding: 24px 0; flex-wrap: wrap; }
.battle-waiting {
  text-align: center;
  padding: 80px 24px;
  color: var(--text-dim);
  font-size: 1.15em;
}
.vs-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5em;
  color: var(--text-dim);
  font-weight: 300;
}

/* ── Reveal animation ── */
@keyframes revealSlide {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
.fade-in { animation: fadeIn 0.4s ease; }

/* ── How it works ── */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; margin-top: 40px; }
.step { text-align: center; }
.step-num {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent);
  color: white;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1em;
  font-weight: 700;
  font-family: var(--font-sans);
  margin-bottom: 16px;
}
.step h3 { margin-bottom: 8px; }
.step p { color: var(--text-dim); font-size: 0.95em; }

/* ── Track cards ── */
.tracks { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin: 48px 0; }
.track-card { text-align: center; padding: 36px 24px; }
.track-card .emoji { font-size: 2.5em; margin-bottom: 16px; }
.track-card.disabled { opacity: 0.45; pointer-events: none; }

/* ── Nav ── */
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}
nav a { color: var(--text-dim); text-decoration: none; font-weight: 500; font-family: var(--font-sans); font-size: 0.95em; transition: color 0.15s; }
nav a:hover { color: var(--text); }
.nav-brand { font-weight: 400; color: var(--text); font-size: 1.1em; font-family: var(--font); letter-spacing: 0.02em; }
.nav-links { display: flex; gap: 24px; }

/* ── Footer ── */
footer {
  padding: 48px 0;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-dim);
  font-size: 0.9em;
}
footer a { color: var(--accent); text-decoration: none; }
footer a:hover { text-decoration: underline; }

/* ── Divider ── */
hr { border: none; border-top: 1px solid var(--border); margin: 48px 0; }

/* ── Responsive ── */
@media (max-width: 768px) {
  h1 { font-size: 2.2em; }
  .battle-arena { grid-template-columns: 1fr; }
  .battle-iframe { height: 400px; }
  .steps { grid-template-columns: 1fr; gap: 24px; }
  .tracks { grid-template-columns: 1fr; }
  .card-grid { grid-template-columns: 1fr; }
  .nav-links { gap: 16px; font-size: 0.85em; }
  .container { padding: 0 16px; }
}