:root {
  --bg: #050505; --card: #111111; --border: #2b2b2b; --border-soft: #1e1e1e;
  --text: #e8e8e8; --text-dim: #8f8f8f; --white: #ffffff;
  --green: #22c55e; --red: #ef4444; --amber: #eab308;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { min-height: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg); color: var(--text);
  /* Top padding + auto side-margins instead of flex-centering — a
     flex-centered body clips/hides overflow at the top on mobile when the
     card is taller than the viewport (learned the hard way on t.kohalab.de,
     2026-08-10). */
  padding: 32px 0;
}
.hidden { display: none; }
.dim { color: var(--text-dim); }
.experiment-note { font-size: 0.68rem; color: var(--amber); margin: -8px 0 14px; text-align: center; }
.wrap { width: 100%; max-width: 480px; padding: 20px; margin: 0 auto; }
.card { background: var(--card); border: 1px solid var(--border); padding: 24px; }
h1 { font-size: 1rem; font-weight: 700; margin-bottom: 10px; text-align: center; letter-spacing: 0.02em; }
label { font-size: 0.72rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.04em; }
input[type="password"] {
  width: 100%; background: #161616; color: var(--text); border: 1px solid var(--border);
  padding: 10px; margin-top: 6px; margin-bottom: 14px; font-size: 0.9rem;
}
button {
  width: 100%; background: #161616; color: var(--text); border: 1px solid var(--border);
  padding: 10px; cursor: pointer; font-size: 0.85rem;
}
button:hover { background: #202020; }
button:disabled { opacity: 0.5; cursor: not-allowed; }
.err { color: var(--red); font-size: 0.8rem; margin-top: 10px; min-height: 1.2em; }
.progress-wrap { margin-top: 14px; }
.progress-label { font-size: 0.72rem; color: var(--text-dim); margin-bottom: 6px; }
.progress-track { height: 6px; background: var(--border-soft); overflow: hidden; }
.progress-fill { height: 100%; width: 0%; background: var(--white); transition: width linear; }
.row { display: flex; justify-content: space-between; align-items: baseline; padding: 10px 0; border-bottom: 1px solid var(--border-soft); }
.row .label { font-size: 0.72rem; color: var(--text-dim); text-transform: uppercase; }
.row .value { font-size: 1.1rem; font-weight: 600; font-variant-numeric: tabular-nums; }
.call-long { color: var(--green); font-weight: 700; }
.call-short { color: var(--red); font-weight: 700; }
.call-flat { color: var(--text-dim); }
.table-wrap { overflow-x: auto; margin-top: 14px; }
table { width: 100%; border-collapse: collapse; font-size: 0.8rem; white-space: nowrap; }
th { text-align: left; color: var(--text-dim); font-weight: 600; padding: 6px 4px; border-bottom: 1px solid var(--border); font-size: 0.65rem; text-transform: uppercase; }
td { padding: 8px 4px; border-bottom: 1px solid var(--border-soft); font-variant-numeric: tabular-nums; cursor: help; }
tr.active-period { background: #161616; }
.footer-row { display: flex; justify-content: space-between; align-items: center; margin-top: 18px; }
.footer-row button { width: auto; padding: 8px 14px; font-size: 0.75rem; }
#session-note { font-size: 0.68rem; color: var(--text-dim); }

@media (max-width: 560px) {
  body { padding-top: 56px; }
  .wrap { padding: 10px; }
  .card { padding: 14px; }
  h1 { font-size: 0.82rem; margin-bottom: 4px; }
  .row .value { font-size: 0.95rem; }
  .row .label { font-size: 0.62rem; }
  table { font-size: 0.72rem; }
  th, td { padding: 6px 3px; }
}