:root {
  --bg: #f3f5f8;
  --card: #ffffff;
  --text: #1c2430;
  --muted: #6b7685;
  --line: #dde2e9;
  --primary: #0b5cad;
  --primary-dark: #084785;
  --danger: #c0392b;
  --ok: #1e8449;
  --busy: #fdecea;
  --free: #eaf6ee;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}
header {
  background: var(--primary);
  color: #fff;
  padding: 18px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}
header h1 { margin: 0; font-size: 1.3rem; }
header a { color: #fff; opacity: .85; text-decoration: none; font-size: .9rem; }
header a:hover { opacity: 1; text-decoration: underline; }
main {
  max-width: 1100px;
  margin: 24px auto;
  padding: 0 16px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
main.single { grid-template-columns: 1fr; }
@media (max-width: 820px) { main { grid-template-columns: 1fr; } }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 20px;
}
.card h2 { margin: 0 0 14px; font-size: 1.1rem; }
label { display: block; font-size: .85rem; font-weight: 600; margin: 12px 0 4px; }
input, select {
  width: 100%;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: .95rem;
  font-family: inherit;
  background: #fff;
}
input:focus, select:focus { outline: 2px solid var(--primary); border-color: transparent; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
button {
  background: var(--primary);
  color: #fff;
  border: 0;
  border-radius: 6px;
  padding: 10px 16px;
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
}
button:hover { background: var(--primary-dark); }
button:disabled { opacity: .6; cursor: not-allowed; }
button.full { width: 100%; margin-top: 18px; }
button.danger { background: var(--danger); padding: 6px 10px; font-size: .8rem; }
button.ghost { background: transparent; color: var(--primary); border: 1px solid var(--primary); }
.msg { margin-top: 12px; padding: 10px 12px; border-radius: 6px; font-size: .9rem; display: none; }
.msg.show { display: block; }
.msg.err { background: var(--busy); color: var(--danger); }
.msg.ok { background: var(--free); color: var(--ok); }
.muted { color: var(--muted); font-size: .85rem; }
.slots { display: grid; grid-template-columns: repeat(auto-fill, minmax(88px, 1fr)); gap: 6px; margin-top: 10px; }
.slot {
  font-size: .8rem;
  padding: 6px 4px;
  text-align: center;
  border-radius: 5px;
  background: var(--free);
  border: 1px solid #cfe9d8;
}
.slot.busy { background: var(--busy); border-color: #f5c6c0; color: var(--danger); }
table { width: 100%; border-collapse: collapse; font-size: .88rem; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: .8rem; text-transform: uppercase; }
.table-wrap { overflow-x: auto; }
.toolbar { display: flex; gap: 10px; flex-wrap: wrap; align-items: end; margin-bottom: 12px; }
.toolbar > div { flex: 1; min-width: 160px; }
.toolbar label { margin-top: 0; }
.hidden { display: none !important; }
.login-box { max-width: 380px; margin: 60px auto; }