:root {
  --bg: #0f172a;
  --surface: #ffffff;
  --surface-alt: #f1f5f9;
  --border: #e2e8f0;
  --text: #0f172a;
  --muted: #64748b;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --accent: #0ea5e9;
  --danger: #dc2626;
  --ok: #16a34a;
  --shadow: 0 1px 3px rgba(15, 23, 42, 0.08), 0 8px 24px rgba(15, 23, 42, 0.06);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  color: var(--text);
  background: var(--surface-alt);
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 250px;
  background: var(--bg);
  color: #e2e8f0;
  display: flex;
  flex-direction: column;
  padding: 24px 16px;
  gap: 24px;
}

.brand { display: flex; align-items: center; gap: 12px; }
.brand .logo { font-size: 32px; }
.brand h1 { margin: 0; font-size: 20px; }
.brand p { margin: 0; font-size: 12px; color: #94a3b8; }

nav { display: flex; flex-direction: column; gap: 4px; }
.nav-item {
  background: transparent;
  border: none;
  color: #cbd5e1;
  text-align: left;
  padding: 11px 14px;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.nav-item:hover { background: rgba(148, 163, 184, 0.12); color: #fff; }
.nav-item.active { background: var(--primary); color: #fff; font-weight: 600; }

.sidebar-footer { margin-top: auto; font-size: 12px; }
.status { color: #94a3b8; }
.status.ok { color: #4ade80; }
.status.err { color: #f87171; }

.content { flex: 1; padding: 32px 40px; overflow-y: auto; }

.view { display: none; }
.view.active { display: block; }

.view-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}
.view-header h2 { margin: 0; font-size: 26px; }

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-shadow: var(--shadow);
}
.stat-card.accent { background: linear-gradient(135deg, var(--primary), var(--accent)); color: #fff; border: none; }
.stat-label { font-size: 13px; color: var(--muted); }
.stat-card.accent .stat-label { color: rgba(255, 255, 255, 0.85); }
.stat-value { font-size: 32px; font-weight: 700; }

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 24px;
  box-shadow: var(--shadow);
}
.panel h3 { margin-top: 0; }

.data-table { width: 100%; border-collapse: collapse; background: var(--surface); border-radius: 12px; overflow: hidden; box-shadow: var(--shadow); }
.data-table th, .data-table td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--border); font-size: 14px; }
.data-table th { background: var(--surface-alt); color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.04em; }
.data-table tr:last-child td { border-bottom: none; }
.data-table tbody tr:hover { background: #f8fafc; }
.empty-row td { text-align: center; color: var(--muted); padding: 28px; }

.badge { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.badge.scheduled { background: #dbeafe; color: #1d4ed8; }
.badge.completed { background: #dcfce7; color: #15803d; }
.badge.cancelled { background: #fee2e2; color: #b91c1c; }

.btn {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 9px 16px;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
.btn:hover { background: var(--surface-alt); }
.btn.primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn.primary:hover { background: var(--primary-dark); }
.btn.link { border: none; background: none; color: var(--primary); padding: 4px 8px; }
.btn.danger { border: none; background: none; color: var(--danger); padding: 4px 8px; }

.modal-backdrop {
  position: fixed; inset: 0; background: rgba(15, 23, 42, 0.5);
  display: flex; align-items: center; justify-content: center; z-index: 50;
}
.modal { background: var(--surface); border-radius: 14px; padding: 24px; width: min(460px, 92vw); box-shadow: var(--shadow); }
.modal h3 { margin-top: 0; }
.modal-form-row { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.modal-form-row label { font-size: 13px; color: var(--muted); }
.modal-form-row input, .modal-form-row select {
  padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; font-family: inherit;
}
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 8px; }

.toast {
  position: fixed; bottom: 24px; right: 24px; background: var(--text); color: #fff;
  padding: 12px 18px; border-radius: 10px; font-size: 14px; box-shadow: var(--shadow); z-index: 60;
}
.toast.err { background: var(--danger); }
.hidden { display: none !important; }