:root {
  --bg: #e8e4dc; --panel: #fffdf8; --ink: #1d1c19; --muted: #6b665c; --line: #d6d0c4;
  --accent: #c23b30; --accent-ink: #fff;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0f1216; --panel: #181c22; --ink: #ece7dc; --muted: #9a958a; --line: #2b3038; --accent: #e0574b; }
}
* { box-sizing: border-box; }
body { margin: 0; min-height: 100dvh; display: grid; place-items: center; background: var(--bg); color: var(--ink);
  font: 16px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif; padding: 16px; }
.gate { width: min(360px, 100%); background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 32px 28px; }
.mark { width: 36px; height: 36px; border-radius: 8px; background: url(/favicon.svg) center/cover; margin-bottom: 18px; }
h1 { margin: 0; font-size: 26px; letter-spacing: -0.01em; }
.sub { margin: 4px 0 24px; color: var(--muted); font-size: 14px; }
label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; }
input { width: 100%; font: inherit; padding: 11px 12px; border-radius: 9px; border: 1px solid var(--line); background: var(--bg); color: var(--ink); }
input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
button { margin-top: 14px; width: 100%; font: inherit; font-weight: 600; padding: 11px; border: 0; border-radius: 9px; background: var(--accent); color: var(--accent-ink); cursor: pointer; }
button:disabled { opacity: .6; }
.error { min-height: 1.4em; margin: 12px 0 0; color: var(--accent); font-size: 14px; }