:root {
  color-scheme: dark;
  --background: #080808;
  --surface: #121212;
  --surface-raised: #191919;
  --border: #303030;
  --text: #f6f6f6;
  --muted: #a0a0a0;
  --accent: #f97316;
  --accent-dark: #c2410c;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at 50% -20%, #2b160a 0, var(--background) 35%);
  color: var(--text);
  font: 16px/1.5 Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
.header { padding: 2.25rem 1rem 1.6rem; text-align: center; border-bottom: 1px solid var(--border); }
.logo { font-size: clamp(1.6rem, 4vw, 2.25rem); font-weight: 800; letter-spacing: -.04em; }
.header p { margin: .3rem 0 0; color: var(--muted); }
.container { width: min(920px, calc(100% - 2rem)); margin: 0 auto; padding: 1.5rem 0; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: .85rem; margin-bottom: 1rem; }
.card { padding: 1.15rem; background: color-mix(in srgb, var(--surface) 94%, transparent); border: 1px solid var(--border); border-radius: 1rem; }
.card span { font-size: 1.4rem; }
.card h2 { margin: .5rem 0 .2rem; font-size: 1rem; }
.card p { margin: 0; color: var(--muted); font-size: .9rem; }
.chat { overflow: hidden; background: var(--surface); border: 1px solid var(--border); border-radius: 1rem; box-shadow: 0 20px 70px rgb(0 0 0 / 35%); }
.messages { height: min(52vh, 440px); min-height: 320px; overflow-y: auto; padding: 1rem; }
.message { width: fit-content; max-width: 82%; margin: .55rem 0; padding: .75rem 1rem; border-radius: .9rem; white-space: pre-wrap; }
.message.ai { margin-right: auto; background: var(--surface-raised); border: 1px solid #292929; }
.message.user { margin-left: auto; background: var(--accent-dark); }
.input-area { display: flex; gap: .65rem; padding: .9rem; border-top: 1px solid var(--border); }
input { min-width: 0; flex: 1; padding: .85rem 1rem; color: var(--text); background: #0b0b0b; border: 1px solid var(--border); border-radius: .7rem; font: inherit; outline: none; }
input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgb(249 115 22 / 15%); }
button { padding: .85rem 1.25rem; color: #fff; background: var(--accent); border: 0; border-radius: .7rem; font: 700 inherit; cursor: pointer; }
button:hover { background: #fb923c; }
footer { padding: 0 1rem 1.5rem; color: #737373; text-align: center; font-size: .8rem; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
@media (max-width: 650px) { .cards { grid-template-columns: 1fr; } .card { display: grid; grid-template-columns: auto 1fr; column-gap: .75rem; } .card h2 { margin: 0; } .card p { grid-column: 2; } .message { max-width: 90%; } }