:root {
  /* Geist (Vercel) – czerń na bieli, tryb jasny */
  --bg: #ffffff; --surface: #fafafa; --text: #0a0a0a; --muted: #4d4d4d; --line: #eaeaea; --line-strong: #d4d4d4;
  --accent: #0a0a0a; --accent-text: #ffffff; --accent-soft: #f2f2f2; --err: #c1121f; --focus: #006bff;
  --font: "Geist", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light;
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.6 var(--font); -webkit-font-smoothing: antialiased; }
.page { max-width: 720px; margin: 0 auto; padding: 48px 16px 64px; }
.eyebrow { margin: 0 0 12px; color: var(--muted); font: 500 13px/1.4 var(--mono); text-transform: uppercase; letter-spacing: .04em; }
h1 { margin: 0 0 12px; font-size: clamp(26px, 5vw, 34px); line-height: 1.2; }
.lead { margin: 0 0 28px; color: var(--muted); }

.booking { background: var(--bg); border: 1px solid var(--line); border-radius: 12px; padding: 20px; box-shadow: 0 1px 2px rgba(0,0,0,.04); }
.bk-msg, .bk-hint { color: var(--muted); margin: 8px 0; }
.bk-tz { margin: 0 0 12px; font-size: 14px; color: var(--muted); }

.bk-days { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 6px; scrollbar-width: thin; }
.bk-day { flex: 0 0 auto; display: grid; gap: 2px; min-width: 72px; padding: 8px 10px; border: 1px solid var(--line);
  border-radius: 8px; background: var(--bg); color: var(--text); font: inherit; cursor: pointer; text-align: center; }
.bk-day span { font-size: 13px; color: var(--muted); }
.bk-day[aria-selected="true"] { border-color: var(--text); background: var(--text); color: var(--bg); }
.bk-day[aria-selected="true"] span { color: #a1a1a1; }

.bk-times { display: grid; grid-template-columns: repeat(auto-fill, minmax(84px, 1fr)); gap: 8px; margin: 16px 0; }
.bk-time { padding: 10px 0; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); color: var(--text);
  font: 500 15px/1.2 var(--mono); cursor: pointer; }
.bk-time:hover, .bk-day:hover { border-color: var(--line-strong); background: var(--surface); }
.bk-day[aria-selected="true"]:hover { background: var(--text); }
.bk-time[aria-pressed="true"], .bk-time[aria-pressed="true"]:hover { background: var(--accent); border-color: var(--accent); color: var(--accent-text); font-weight: 600; }
button:focus-visible, input:focus-visible, textarea:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }

.bk-form { display: grid; gap: 14px; border-top: 1px solid var(--line); padding-top: 18px; }
.bk-picked { margin: 0; }
.bk-field { display: grid; gap: 6px; font-size: 14px; color: var(--text); font-weight: 500; }
.bk-field input, .bk-field textarea { width: 100%; padding: 10px 12px; border: 1px solid var(--line-strong); border-radius: 6px;
  background: var(--bg); color: var(--text); font: inherit; font-size: 16px; font-weight: 400; }
.bk-field input:focus, .bk-field textarea:focus { border-color: var(--text); outline: none; box-shadow: 0 0 0 3px rgba(0,0,0,.08); }
.bk-hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.bk-err { margin: 0; color: var(--err); min-height: 0; }
.bk-err:empty { display: none; }
.bk-submit { justify-self: start; padding: 11px 20px; border: 0; border-radius: 6px; background: var(--accent);
  color: var(--accent-text); font: inherit; font-weight: 600; cursor: pointer; }
.bk-submit:disabled { opacity: .6; cursor: progress; }
.bk-privacy { margin: 0; font-size: 13px; color: var(--muted); }
.bk-done h3 { margin: 0 0 8px; }
a { color: var(--text); text-underline-offset: 3px; }