:root {
  color-scheme: dark;
  --bg: #080b12;
  --panel: rgba(17, 23, 35, 0.82);
  --border: rgba(148, 163, 184, 0.18);
  --text: #f8fafc;
  --muted: #94a3b8;
  --cyan: #39d5ff;
  --violet: #8b5cf6;
  --green: #59f0a8;
  --danger: #fb7185;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.36);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
html { min-height: 100%; background: var(--bg); }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at 15% 20%, rgba(57, 213, 255, 0.10), transparent 28rem),
    radial-gradient(circle at 85% 10%, rgba(139, 92, 246, 0.12), transparent 30rem),
    linear-gradient(180deg, #090d16 0%, #070a10 100%);
}
button, input { font: inherit; }
button { color: inherit; }
.page-noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.18;
  background-image: linear-gradient(rgba(255,255,255,0.016) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.016) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: linear-gradient(to bottom, black, transparent 85%);
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem clamp(1rem, 4vw, 3.5rem);
  border-bottom: 1px solid var(--border);
  background: rgba(8, 11, 18, 0.78);
  backdrop-filter: blur(18px);
}
.brand { display: inline-flex; align-items: center; gap: 0.8rem; color: var(--text); text-decoration: none; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 2.5rem;
  aspect-ratio: 1;
  border: 1px solid rgba(57, 213, 255, 0.45);
  border-radius: 0.85rem;
  background: linear-gradient(135deg, rgba(57,213,255,.16), rgba(139,92,246,.16));
  color: var(--cyan);
  font-weight: 900;
  letter-spacing: -0.06em;
  box-shadow: inset 0 0 24px rgba(57,213,255,.06);
}
.brand-copy { display: grid; line-height: 1.05; }
.brand-copy strong { letter-spacing: 0.12em; font-size: 0.88rem; }
.brand-copy small { margin-top: 0.25rem; color: var(--muted); font-size: 0.60rem; letter-spacing: 0.16em; }
.build-pill { padding: 0.42rem 0.75rem; border: 1px solid var(--border); border-radius: 999px; color: var(--muted); font-size: 0.75rem; background: rgba(15, 23, 42, 0.6); }
.app-shell { width: min(1200px, calc(100% - 2rem)); margin: 0 auto; padding: clamp(2rem, 5vw, 4.5rem) 0 5rem; }
.auth-layout { min-height: calc(100vh - 10rem); display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr); align-items: center; gap: clamp(2rem, 6vw, 6rem); }
.hero-copy h1, .hero-dashboard h1 { margin: 0.4rem 0 1rem; max-width: 12ch; font-size: clamp(3rem, 8vw, 6.2rem); line-height: 0.92; letter-spacing: -0.065em; }
.hero-dashboard h1 { font-size: clamp(2.6rem, 6vw, 5rem); max-width: 10ch; }
.hero-text { max-width: 62ch; color: #cbd5e1; font-size: clamp(1rem, 1.8vw, 1.16rem); line-height: 1.7; }
.eyebrow { margin: 0; color: var(--cyan); font-size: 0.72rem; font-weight: 800; letter-spacing: 0.18em; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 0.55rem; margin-top: 1.6rem; }
.hero-tags span { padding: 0.48rem 0.72rem; border: 1px solid var(--border); border-radius: 999px; color: #cbd5e1; background: rgba(15,23,42,.58); font-size: 0.78rem; }
.panel { border: 1px solid var(--border); border-radius: 1.25rem; background: var(--panel); box-shadow: var(--shadow); backdrop-filter: blur(16px); }
.auth-card { padding: clamp(1.4rem, 4vw, 2.4rem); }
.panel-heading h2, .engine-panel h2 { margin: 0.45rem 0 0.55rem; letter-spacing: -0.03em; }
.panel-heading p, .engine-panel p { color: var(--muted); line-height: 1.6; }
.auth-form { display: grid; gap: 1rem; margin-top: 1.6rem; }
.auth-form label { display: grid; gap: 0.45rem; color: #cbd5e1; font-size: 0.82rem; font-weight: 700; }
.auth-form input { width: 100%; border: 1px solid var(--border); border-radius: 0.85rem; padding: 0.9rem 1rem; outline: none; background: rgba(2, 6, 23, 0.72); color: var(--text); transition: border-color .18s ease, box-shadow .18s ease; }
.auth-form input:focus { border-color: rgba(57,213,255,.7); box-shadow: 0 0 0 3px rgba(57,213,255,.09); }
.auth-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 0.7rem; margin-top: 0.25rem; }
.button { border: 0; border-radius: 0.85rem; padding: 0.82rem 1rem; cursor: pointer; font-weight: 800; transition: transform .18s ease, filter .18s ease, border-color .18s ease; }
.button:hover { transform: translateY(-1px); }
.button:active { transform: translateY(0); }
.button:disabled { cursor: not-allowed; opacity: 0.55; transform: none; }
.button-primary { color: #061018; background: linear-gradient(135deg, var(--cyan), #7ee7ff); }
.button-secondary { border: 1px solid var(--border); background: rgba(15,23,42,.72); }
.status-message { min-height: 1.2rem; margin: 0; color: var(--muted); font-size: 0.82rem; }
.status-message.is-error { color: var(--danger); }
.status-message.is-success { color: var(--green); }
.game-layout { display: grid; gap: 1.25rem; }
.account-bar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1rem 1.1rem; }
.account-bar > div { display: grid; gap: 0.2rem; }
.account-bar small { color: var(--muted); max-width: min(65vw, 34rem); overflow: hidden; text-overflow: ellipsis; }
.hero-dashboard { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: end; gap: 2rem; padding: clamp(1.5rem, 4vw, 3rem) 0; }
.core-score { min-width: 12rem; padding: 1.2rem 1.35rem; border: 1px solid rgba(57,213,255,.24); border-radius: 1.2rem; background: linear-gradient(145deg, rgba(57,213,255,.10), rgba(139,92,246,.10)); text-align: right; }
.core-score span, .core-score small { display: block; color: var(--muted); font-size: .72rem; letter-spacing: .12em; }
.core-score strong { display: block; margin: .2rem 0; font-size: 4rem; line-height: 1; color: var(--cyan); }
.mode-nav { display: flex; gap: .5rem; overflow-x: auto; padding-bottom: .15rem; }
.mode-tab { white-space: nowrap; border: 1px solid var(--border); border-radius: 999px; padding: .58rem .82rem; background: rgba(15,23,42,.55); color: var(--muted); }
.mode-tab.is-active { color: var(--text); border-color: rgba(57,213,255,.42); background: rgba(57,213,255,.08); }
.dashboard-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.rule-card { display: grid; grid-template-columns: auto 1fr; gap: 1rem; padding: 1.2rem; }
.rule-number { color: var(--cyan); font-size: 0.75rem; font-weight: 900; letter-spacing: .12em; }
.rule-card h3 { margin: 0 0 .45rem; letter-spacing: -.02em; }
.rule-card p { margin: 0; color: var(--muted); line-height: 1.6; }
.engine-panel { display: grid; grid-template-columns: minmax(0, .75fr) minmax(320px, 1.25fr); gap: 1rem; padding: 1.2rem; align-items: start; }
.engine-panel code { color: var(--cyan); }
.engine-panel pre { margin: 0; max-height: 28rem; overflow: auto; padding: 1rem; border-radius: .9rem; border: 1px solid var(--border); background: #05080e; color: #cbd5e1; font-size: .76rem; line-height: 1.5; }
@media (max-width: 800px) {
  .auth-layout, .hero-dashboard, .engine-panel { grid-template-columns: 1fr; }
  .auth-layout { min-height: auto; }
  .dashboard-grid { grid-template-columns: 1fr; }
  .core-score { min-width: 0; text-align: left; }
}
@media (max-width: 520px) {
  .app-shell { width: min(100% - 1rem, 1200px); }
  .site-header { padding-inline: .75rem; }
  .brand-copy small { display: none; }
  .build-pill { font-size: .66rem; }
  .auth-actions { grid-template-columns: 1fr; }
}