:root {
  --bg: #15171B;
  --surface: #1D2025;
  --surface-2: #242830;
  --border: #2C3038;
  --text: #E9E7E0;
  --text-muted: #8E8C85;
  --accent: #3B8BD4;
  --available-bg: #0F3A2E;
  --available-fg: #4CC79A;
  --out-bg: #40300F;
  --out-fg: #F2B24C;
  --danger: #C0453F;
  --radius: 6px;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.5;
}

.shell { min-height: 100vh; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 28px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.brand {
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 13px;
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
}

.topbar nav a {
  color: var(--text-muted);
  text-decoration: none;
  margin-left: 22px;
  font-size: 14px;
}

.topbar nav a:hover { color: var(--text); }

.content {
  max-width: 1000px;
  margin: 0 auto;
  padding: 32px 28px 64px;
}

h1 {
  font-size: 22px;
  font-weight: 600;
  margin: 0;
}

h2 {
  font-size: 15px;
  font-weight: 600;
  margin: 0 0 14px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.page-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 20px;
  gap: 12px;
}

.page-head-actions { display: flex; gap: 8px; }

.subtle { color: var(--text-muted); font-size: 13px; margin: 4px 0 0; }
.mono { font-family: var(--font-mono); }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
}

.detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

@media (max-width: 720px) {
  .detail-grid { grid-template-columns: 1fr; }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  font-size: 14px;
  text-decoration: none;
  cursor: pointer;
}

.btn:hover { border-color: var(--text-muted); }

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #0A1420;
  font-weight: 600;
}

.btn-ghost {
  background: transparent;
  border-color: transparent;
  color: var(--text-muted);
}

.btn-danger {
  background: transparent;
  border-color: var(--danger);
  color: var(--danger);
}

.btn-sm { padding: 4px 10px; font-size: 13px; }

/* Forms */
.form { display: flex; flex-direction: column; gap: 14px; max-width: 560px; }
.form-inline { display: flex; gap: 10px; align-items: center; max-width: 480px; }
.form-row { display: flex; gap: 14px; }
.form-row label { flex: 1; }
.form-actions { display: flex; gap: 10px; margin-top: 4px; }

label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  color: var(--text-muted);
}

input, select, textarea {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  padding: 9px 10px;
  font-size: 14px;
  font-family: inherit;
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.filter-bar {
  display: flex;
  gap: 10px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.filter-bar input { flex: 1; min-width: 180px; }

/* Table */
.table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.table th {
  text-align: left;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--text-muted);
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
}

.table td {
  padding: 11px 14px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}

.table tbody tr:last-child td { border-bottom: none; }
.table tbody tr[onclick] { cursor: pointer; }
.table tbody tr[onclick]:hover { background: var(--surface-2); }

.cell-name { font-weight: 600; }
.cell-actions { text-align: right; }
.empty { color: var(--text-muted); text-align: center; padding: 24px; }

/* Tags */
.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 3px 8px;
  border-radius: 4px;
}

.tag-available { background: var(--available-bg); color: var(--available-fg); }
.tag-out { background: var(--out-bg); color: var(--out-fg); }
.tag-type { background: var(--surface-2); color: var(--text-muted); border: 1px solid var(--border); }

/* Definition list */
.dl { display: grid; grid-template-columns: 110px 1fr; gap: 8px 12px; margin: 0; }
.dl dt { color: var(--text-muted); font-size: 13px; }
.dl dd { margin: 0; font-size: 14px; }

/* Auth */
.login-wrap {
  display: flex;
  justify-content: center;
  padding-top: 60px;
}

.login-wrap .card { width: 100%; max-width: 340px; }
.login-wrap h1 { margin-bottom: 4px; }

.error-text {
  color: var(--danger);
  font-size: 13px;
  margin: 0;
}

.nav-user {
  color: var(--text-muted);
  font-size: 13px;
  margin-left: 22px;
  font-family: var(--font-mono);
}

.nav-logout {
  display: inline-block;
  margin-left: 10px;
}

/* Calendar */
#calendar { color: var(--text); }
.fc { --fc-border-color: var(--border); --fc-page-bg-color: var(--surface); --fc-neutral-bg-color: var(--surface-2); }
.fc .fc-toolbar-title { font-size: 16px; }
.fc-theme-standard .fc-scrollgrid { border-color: var(--border); }