:root {
  --bg: #f7f7f5;
  --card: #ffffff;
  --text: #1f2328;
  --muted: #5c6670;
  --accent: #2d6cdf;
  --border: #e2e4e8;
  color-scheme: light;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
.wrap { max-width: 640px; margin: 0 auto; padding: 32px 16px; }
h1 { margin: 0 0 4px; font-size: 28px; }
.lead { margin: 0 0 24px; color: var(--muted); }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 20px; }
.muted { color: var(--muted); }
.mono { font-family: ui-monospace, Consolas, monospace; font-size: 14px; word-break: break-all; }
.btn {
  display: inline-block; padding: 10px 18px; border-radius: 8px; border: 1px solid var(--accent);
  background: var(--accent); color: #fff; text-decoration: none; font-weight: 600;
}
.btn-light { background: transparent; color: var(--accent); }

/* ---------------------------------------------------------------- stage B: shared app UI (mobile-first) */
:root { --ok: #1f7a3d; --warn: #9a5b00; --err: #b42318; --busy: #d9dce1; --mine: #cfe0ff; --free: #e6f4ea; }
.top { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 12px 16px; background: var(--card); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 5; }
.top strong { font-size: 18px; }
.top a { color: var(--accent); text-decoration: none; font-size: 14px; }
.tabs { display: flex; gap: 4px; overflow-x: auto; padding: 8px 16px; background: var(--card); border-bottom: 1px solid var(--border); }
.tabs button { flex: 0 0 auto; border: 1px solid var(--border); background: var(--bg); color: var(--text); border-radius: 999px; padding: 8px 14px; font: inherit; font-size: 14px; cursor: pointer; }
.tabs button[aria-selected="true"] { background: var(--accent); border-color: var(--accent); color: #fff; }
.tabs.big button { flex: 1 1 0; border-radius: 10px; padding: 10px 8px; text-align: left; }
.tabs.big small { display: block; font-size: 12px; opacity: .85; }
section[data-tab] { padding: 16px; max-width: 760px; margin: 0 auto; }
.card + .card { margin-top: 12px; }
h2 { font-size: 20px; margin: 0 0 12px; }
h3 { font-size: 16px; margin: 16px 0 8px; }
label { display: block; font-size: 14px; color: var(--muted); margin: 10px 0 4px; }
label.inline { display: inline-flex; align-items: center; gap: 6px; color: var(--text); margin: 6px 12px 6px 0; }
input, select, textarea { font: inherit; font-size: 16px; width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px; background: #fff; color: var(--text); }
input[type="checkbox"], input[type="radio"] { width: auto; }
.row { display: flex; gap: 8px; flex-wrap: wrap; align-items: flex-end; }
.row > * { flex: 1 1 120px; }
.row > .btn, .row > button { flex: 0 0 auto; }
button.btn { cursor: pointer; font: inherit; font-weight: 600; }
.btn-sm { padding: 6px 12px; font-size: 14px; }
.btn-ok { background: var(--ok); border-color: var(--ok); }
.btn-err { background: var(--err); border-color: var(--err); }
.btn:disabled { opacity: .5; cursor: default; }
.actions { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 8px; }
.msg { margin: 10px 0; padding: 10px 12px; border-radius: 8px; font-size: 14px; }
.msg:empty { display: none; }
.msg.ok { background: var(--free); color: var(--ok); }
.msg.err { background: #fdecea; color: var(--err); }
.msg.info { background: #eef3fd; color: var(--text); }
.list { list-style: none; margin: 0; padding: 0; }
.list > li { border: 1px solid var(--border); border-radius: 10px; padding: 12px; background: var(--card); margin-bottom: 8px; }
.list > li.hl { border-color: var(--accent); box-shadow: 0 0 0 2px var(--mine); }
.badge { display: inline-block; font-size: 12px; padding: 2px 8px; border-radius: 999px; background: var(--busy); color: var(--text); vertical-align: middle; }
.badge.pending, .badge.cancelreq { background: #fff3d6; color: var(--warn); }
.badge.approved { background: var(--free); color: var(--ok); }
.badge.rejected, .badge.cancelled, .badge.declined { background: #fdecea; color: var(--err); }
.badge.proposed { background: var(--mine); color: var(--accent); }
.weeknav { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin: 8px 0; }
.weeknav span { font-weight: 600; }
.day { border: 1px solid var(--border); border-radius: 10px; background: var(--card); padding: 10px 12px; margin-bottom: 8px; }
.day.past { opacity: .55; }
.day header { display: flex; justify-content: space-between; font-size: 14px; }
.bar { position: relative; height: 22px; border-radius: 6px; background: var(--free); margin: 8px 0 6px; overflow: hidden; }
.bar.closed { background: var(--busy); }
.bar i { position: absolute; top: 0; bottom: 0; background: var(--busy); }
.bar i.mine { background: var(--accent); opacity: .55; }
.free { display: flex; flex-wrap: wrap; gap: 6px; }
.free button { border: 1px solid var(--ok); color: var(--ok); background: #fff; border-radius: 6px; padding: 4px 8px; font: inherit; font-size: 13px; cursor: pointer; }
.slot { font-size: 14px; margin: 2px 0; }
.note { font-size: 13px; color: var(--muted); }
.lock { border: 1px dashed var(--warn); background: #fffaf0; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--border); }
.hours-grid .row > label { flex: 0 0 90px; margin: 0; color: var(--text); align-self: center; }
.steps { display: flex; gap: 6px; margin-bottom: 12px; }
.steps span { flex: 1; height: 4px; border-radius: 2px; background: var(--border); }
.steps span.on { background: var(--accent); }
.hint { background: #eef3fd; border: 1px solid #cddcf7; }
[hidden] { display: none !important; }
@media (min-width: 720px) { .top { padding: 12px 24px; } }