:root {
  --bg: #f8f9fa;
  --card: #ffffff;
  --text: #1a1a1a;
  --muted: #6c757d;
  --border: rgba(0, 0, 0, 0.1);
  --primary: #0d6efd;
  --danger: #dc3545;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial;
  background: radial-gradient(1200px 600px at 20% 0%, rgba(13,110,253,0.08), transparent), var(--bg);
  color: var(--text);
}

.header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}
.brand { font-weight: 700; letter-spacing: 0.2px; }
.me { color: var(--muted); font-size: 14px; }
.header-right { display: flex; gap: 10px; align-items: center; }

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 16px;
  display: grid;
  gap: 16px;
}

.two-column-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  align-items: start;
}

@media (max-width: 900px) {
  .two-column-layout {
    grid-template-columns: 1fr;
  }
}

.card {
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: 14px;
  padding: 14px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.row {
  display: flex;
  align-items: center;
}
.row.gap { gap: 10px; }
.grow { flex: 1; }
.end { justify-content: flex-end; }

h2 { margin: 6px 0 12px; font-size: 18px; }

.input {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #ffffff;
  color: var(--text);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #ffffff;
  color: var(--text);
  text-decoration: none;
  cursor: pointer;
  font-size: 12px;
}
.button.primary { background: var(--primary); border-color: var(--primary); color: #ffffff; }
.button.danger { background: var(--danger); border-color: var(--danger); color: #ffffff; }
.button:disabled { opacity: 0.5; cursor: not-allowed; }

.list {
  display: grid;
  gap: 10px;
  margin-top: 12px;
}

.item {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px;
  display: grid;
  gap: 8px;
}
.item-title { font-weight: 650; }
.item-meta { color: var(--muted); font-size: 13px; }
.item-actions { display: flex; gap: 10px; }
.item-actions .button { font-size: 11px; padding: 6px 10px; }

.advanced { margin-top: 10px; }

.dialog::backdrop { background: rgba(0,0,0,0.4); }
.dialog {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--card);
  color: var(--text);
  padding: 0;
  box-shadow: 0 10px 40px rgba(0,0,0,0.15);
}
.dialog-form { padding: 14px; min-width: 420px; }
.dialog-form h3 { margin: 0 0 10px; }

/* Spinner */
.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid rgba(13, 110, 253, 0.1);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Breadcrumb */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.breadcrumb-item {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s;
}

.breadcrumb-item:hover {
  color: var(--primary);
  cursor: pointer;
}

.breadcrumb-separator {
  color: var(--muted);
  user-select: none;
}

.breadcrumb-current {
  color: var(--text);
  font-weight: 600;
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--muted);
}

.empty-state-icon {
  font-size: 48px;
  margin-bottom: 16px;
  opacity: 0.5;
}

.empty-state-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}

.empty-state-description {
  font-size: 14px;
  margin-bottom: 16px;
}