:root {
  --bg: #f5f7fb;
  --card: #ffffff;
  --text: #1f2d3d;
  --muted: #6b7a90;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --danger: #dc2626;
  --warning: #d97706;
  --success: #059669;
  --border: #d7dee8;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
code.mono, .mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.9em; }

/* ---------- Public booking UI ---------- */
.page-header { max-width: 900px; margin: 0 auto; padding: 2rem 1rem 1rem; }
.page-header h1 { margin: 0 0 0.25rem; }
.page-header .sub { color: var(--muted); margin: 0.5rem 0 0; }
.page-header .admin-link { font-size: 0.85rem; }
.banner {
  background: #fef3c7; color: #92400e;
  padding: 0.5rem 0.75rem; border-radius: 6px; margin: 0.5rem 0; font-size: 0.9rem;
}

main { max-width: 900px; margin: 0 auto; padding: 0 1rem 3rem; display: grid; gap: 1.5rem; }
section {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 10px; padding: 1.25rem;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}

.toolbar { display: flex; align-items: center; gap: 1rem; margin-bottom: 1rem; }

button {
  border: none; background: var(--primary); color: white;
  padding: 0.6rem 1rem; border-radius: 6px; font-size: 0.95rem;
  cursor: pointer; font-family: inherit;
}
button:hover { background: var(--primary-dark); }
button:disabled { opacity: 0.5; cursor: not-allowed; }
button.secondary { background: #e5e7eb; color: var(--text); }
button.secondary:hover { background: #d1d5db; }

#status-msg { color: var(--muted); font-size: 0.9rem; }

.slots { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.5rem; }
.slot {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 0.75rem 1rem; border: 1px solid var(--border);
  border-radius: 8px; background: #fbfcfe;
}
.slot .when { font-weight: 600; font-variant-numeric: tabular-nums; }
.slot .duration { color: var(--muted); font-size: 0.85rem; }
.slot .state { font-size: 0.85rem; }
.slot.free .state { color: var(--success); }
.slot.reserved .state { color: var(--warning); }
.slot.mine .state { color: var(--primary); }
.slot.queued .state { color: var(--warning); }
.slot button { padding: 0.4rem 0.9rem; font-size: 0.9rem; }

.selected {
  background: #eef2ff; border-radius: 6px; padding: 0.6rem 0.8rem;
  margin: 0 0 1rem; font-weight: 600;
}

.timers { display: flex; gap: 1rem; margin-bottom: 1rem; }
.timer { flex: 1; background: #f1f5f9; padding: 0.75rem; border-radius: 8px; text-align: center; }
.timer .label { display: block; color: var(--muted); font-size: 0.8rem; }
.timer .value { font-size: 1.6rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.timer.warn .value { color: var(--warning); }
.timer.danger .value { color: var(--danger); }

form { display: grid; gap: 0.75rem; }
form label { display: flex; flex-direction: column; gap: 0.3rem; font-size: 0.9rem; color: var(--muted); }
form input, form textarea, form select {
  padding: 0.55rem 0.7rem; border: 1px solid var(--border);
  border-radius: 6px; font-size: 1rem; font-family: inherit;
  background: white; color: var(--text);
}
form input:focus, form textarea:focus {
  outline: none; border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}
.actions { display: flex; gap: 0.5rem; }
.form-msg { margin: 0; font-size: 0.9rem; min-height: 1.2rem; }
.form-msg.error { color: var(--danger); }
.form-msg.success { color: var(--success); }

.hidden { display: none !important; }

/* ---------- Admin UI ---------- */
body.admin, body.login, body.install { background: #eef2f7; }
.wrap { max-width: 1000px; margin: 0 auto; padding: 0 1rem; }
.admin-header {
  background: #0f172a; color: #e2e8f0;
  box-shadow: 0 1px 4px rgba(0,0,0,0.12);
}
.admin-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.9rem 1rem;
}
.admin-header .brand { color: white; letter-spacing: 0.02em; }
.admin-header nav { display: flex; gap: 0.25rem; align-items: center; flex-wrap: wrap; }
.admin-header nav a {
  color: #cbd5e1; padding: 0.35rem 0.7rem; border-radius: 6px;
}
.admin-header nav a:hover { background: #1e293b; text-decoration: none; }
.admin-header nav a.active { background: #1e293b; color: white; }
.admin-header nav .me { color: #94a3b8; font-size: 0.85rem; margin-left: 0.4rem; }

.admin-main { padding-top: 1.5rem; padding-bottom: 3rem; display: grid; gap: 1.25rem; }
.admin-main h1 { margin: 0 0 0.5rem; }

.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 10px; padding: 1.25rem;
}
.card > h2 { margin-top: 0; }

.msg {
  padding: 0.7rem 0.9rem; border-radius: 6px; font-size: 0.95rem;
}
.msg.error   { background: #fee2e2; color: #991b1b; }
.msg.success { background: #dcfce7; color: #166534; }

ul.status { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.4rem; }
ul.status .ok    { color: var(--success); }
ul.status .warn  { color: var(--warning); }
ul.status .err   { color: var(--danger); }

.grid {
  width: 100%; border-collapse: collapse; margin-top: 0.5rem;
}
.grid th, .grid td {
  padding: 0.5rem 0.6rem; border-bottom: 1px solid var(--border);
  text-align: left; font-size: 0.9rem;
}
.grid th { background: #f8fafc; font-weight: 600; color: var(--muted); }
.grid .small { font-size: 0.8rem; color: var(--muted); }

.inline-form { display: flex; flex-wrap: wrap; gap: 0.8rem; align-items: end; }
.inline-form label { margin: 0; }

.settings-form fieldset.card {
  border: 1px solid var(--border); background: white;
}
.settings-form fieldset legend {
  padding: 0 0.4rem; font-weight: 600; color: var(--muted);
}
.settings-form label .label { font-weight: 600; color: var(--text); }
.settings-form label .help  { color: var(--muted); font-size: 0.8rem; }

/* Login + Install */
body.login, body.install { min-height: 100vh; display: flex; align-items: center; justify-content: center; }
body.login .card, body.install .card { max-width: 420px; width: 90%; }

.small { font-size: 0.85rem; color: var(--muted); }