:root {
  color-scheme: light;
  --bg: #f5f4f8;
  --card: #ffffff;
  --text: #1a1a22;
  --muted: #6b6b78;
  --border: #e3e1ea;
  --accent: #2f6fed;
  --accent-hover: #2558c4;
  --danger: #d64545;
  --success: #1a8f4c;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
}

.brand {
  font-weight: 700;
  font-size: 18px;
  text-decoration: none;
  color: var(--text);
}
.brand-mark { color: var(--accent); }
.tm { font-size: .55em; vertical-align: super; margin-left: 1px; }

.nav-links { display: flex; align-items: center; gap: 18px; }
.nav-links a { color: var(--text); text-decoration: none; }
.nav-links a:hover { color: var(--accent); }
.nav-user { color: var(--muted); font-size: 14px; }

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 32px 20px 80px;
}

h1 { font-size: 24px; margin-bottom: 20px; }
h2 { font-size: 16px; margin: 0 0 12px; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
  margin-bottom: 24px;
}

.card-title { text-transform: uppercase; letter-spacing: .03em; color: var(--muted); font-size: 13px; }

.auth-card { max-width: 380px; margin: 40px auto; }

form label {
  display: block;
  margin-bottom: 14px;
  font-size: 14px;
  color: var(--muted);
}

.inline-form {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: flex-end;
}
.inline-form label { margin-bottom: 0; min-width: 110px; }
.inline-form button { align-self: center; height: 38px; padding: 0 16px; }

.checkbox-label { display: flex; align-items: center; gap: 6px; font-size: 14px; }
.checkbox-label input { width: auto; margin: 0; }

input {
  display: block;
  width: 100%;
  margin-top: 6px;
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
}
input:disabled { background: var(--bg); color: var(--muted); }

button {
  cursor: pointer;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  padding: 9px 14px;
}
button:hover { background: var(--accent-hover); }

.auth-card button[type="submit"] { width: 100%; padding: 10px; margin-top: 6px; }

.muted { color: var(--muted); font-size: 14px; }
.muted.small { font-size: 12px; }

.flash {
  padding: 10px 14px;
  border-radius: 6px;
  margin-bottom: 18px;
  font-size: 14px;
}
.flash-error { background: #fdecec; color: var(--danger); }
.flash-success { background: #e9f8ef; color: var(--success); }

.tile-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}
.tile {
  display: block;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  text-decoration: none;
  color: var(--text);
}
.tile:hover { border-color: var(--accent); }
.tile h2 { margin: 0 0 6px; }

.day-group { margin-bottom: 24px; }

.slot-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 8px;
}

.slot-tile {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px;
  font-size: 13px;
  text-align: center;
}
.slot-tile.open { background: var(--card); }
.slot-tile.booked { background: #eaf1fd; }

.status-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .03em;
  color: var(--danger);
  background: #fdecec;
  border-radius: 4px;
  padding: 2px 8px;
  vertical-align: middle;
  margin-left: 6px;
}
.status-badge-muted { color: var(--muted); background: var(--bg); }
.slot-owner { color: var(--accent); font-size: 12px; margin-top: 2px; }

.booking-list { list-style: none; padding: 0; margin: 0; }
.booking-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}
.booking-item:last-child { border-bottom: none; }

.link-btn {
  background: none;
  color: var(--danger);
  padding: 0;
  font-size: 13px;
  text-decoration: underline;
  font-weight: normal;
}
.link-btn:hover { background: none; text-decoration: none; }

.tabs { display: flex; gap: 16px; margin-bottom: 18px; border-bottom: 1px solid var(--border); }
.tabs a { padding: 8px 4px; color: var(--muted); text-decoration: none; font-size: 14px; border-bottom: 2px solid transparent; }
.tabs a.active { color: var(--accent); border-bottom-color: var(--accent); }

.data-table { width: 100%; border-collapse: collapse; background: var(--card); border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
.data-table th, .data-table td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--border); font-size: 14px; }
.data-table th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .03em; }
.data-table tr:last-child td { border-bottom: none; }

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #16151b;
    --card: #201f28;
    --text: #eeedf3;
    --muted: #9d9ba8;
    --border: #322f3d;
  }
  .slot-tile.booked { background: #1c2740; }
}