:root {
  --bg: #14161a;
  --card: #1f2229;
  --line: #333844;
  --text: #f1f3f6;
  --muted: #a3a9b6;
  --accent: #f2b84b;
  --ok: #2e9e5b;
  --bad: #d64545;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--text); }
body {
  font: 18px/1.5 -apple-system, system-ui, "Segoe UI", Roboto, sans-serif;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
  -webkit-text-size-adjust: 100%;
}
.app { max-width: 480px; margin: 0 auto; padding: 20px 16px 48px; }
h1 { font-size: 26px; margin: 8px 0 4px; }
h2 { font-size: 20px; margin: 0 0 8px; }
p { margin: 8px 0; }
a { color: var(--accent); }
.sub { color: var(--muted); font-size: 16px; margin-bottom: 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 16px; margin: 16px 0; }
.note { color: var(--muted); font-size: 15px; }
.small { font-size: 14px; color: var(--muted); }
.btn {
  display: block; width: 100%; border: 0; border-radius: 16px; padding: 20px 16px;
  font: inherit; font-size: 24px; font-weight: 700; color: #1a1300; background: var(--accent);
  cursor: pointer; margin: 12px 0; text-align: center; text-decoration: none;
}
.btn:disabled { opacity: 0.5; }
.btn.secondary { background: transparent; color: var(--text); border: 2px solid var(--line); font-size: 18px; font-weight: 600; padding: 14px 16px; }
.btn.small-btn { font-size: 16px; padding: 10px 14px; width: auto; display: inline-block; }
.result { border-radius: 14px; padding: 18px 16px; margin: 16px 0; font-size: 22px; font-weight: 700; }
.result.ok { background: #14301f; border: 2px solid var(--ok); color: #bff0d1; }
.result.bad { background: #351919; border: 2px solid var(--bad); color: #ffd2d2; }
.result.info { background: var(--card); border: 2px solid var(--line); color: var(--text); font-weight: 600; font-size: 18px; }
.words { font-size: 40px; font-weight: 800; letter-spacing: 2px; text-align: center; color: var(--accent); margin: 12px 0; }
label { display: block; margin: 12px 0 4px; font-weight: 600; }
input[type="text"], input[type="time"], textarea {
  width: 100%; font: inherit; font-size: 22px; padding: 12px; color: var(--text);
  background: #0f1115; border: 2px solid var(--line); border-radius: 12px;
}
input.code { text-align: center; letter-spacing: 4px; text-transform: uppercase; font-size: 28px; }
textarea { min-height: 84px; font-size: 18px; }
.check { display: flex; gap: 12px; align-items: flex-start; margin: 14px 0; font-weight: 400; }
.check input { width: 26px; height: 26px; flex: none; margin-top: 3px; }
ul.plain { padding-left: 20px; margin: 8px 0; }
ul.plain li { margin: 6px 0; }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.mono { font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 14px; word-break: break-all; color: var(--muted); }
.hidden { display: none; }
.measure { font-size: 15px; color: var(--muted); margin: 4px 0; }
.dot-ok { color: #6fdc9b; }
.dot-bad { color: #ff8a8a; }
.nav { display: flex; gap: 14px; flex-wrap: wrap; font-size: 15px; margin-top: 24px; }