:root {
  --bg: #f7f8fa;
  --card: #ffffff;
  --border: #e2e5ea;
  --text: #1c2128;
  --muted: #6b7280;
  --accent: #2563eb;
  --accent-light: #eaf1ff;
  --danger: #dc2626;
  --star: #f5a623;
}

* { 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);
}

.topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 24px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.topbar h1 { font-size: 20px; margin: 0; white-space: nowrap; }
#search {
  flex: 1;
  max-width: 480px;
  padding: 9px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
}
.auth-area { margin-left: auto; display: flex; gap: 10px; align-items: center; }

.link-btn {
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  font-size: 14px;
  padding: 6px 4px;
}
.btn {
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: 7px;
  padding: 8px 14px;
  font-size: 14px;
  cursor: pointer;
}
.btn.primary { background: var(--accent); color: white; border-color: var(--accent); }
.btn.danger { background: white; color: var(--danger); border-color: var(--danger); margin-right: auto; }
.hidden { display: none !important; }

.category-tabs, .chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 10px 24px;
}
.category-tabs { padding-top: 16px; padding-bottom: 4px; }

.tab, .chip {
  padding: 6px 14px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--card);
  font-size: 13px;
  cursor: pointer;
  color: var(--text);
  user-select: none;
}
.tab.active, .chip.active {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}
.tab.category-tab { font-weight: 600; }

.result-count {
  padding: 4px 24px 0;
  font-size: 12px;
  color: var(--muted);
}

.results {
  padding: 8px 24px 60px;
  display: flex;
  flex-direction: column;
}

.row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}
.row:hover { background: var(--accent-light); }

.star {
  cursor: pointer;
  color: var(--border);
  font-size: 16px;
  flex-shrink: 0;
}
.star.active { color: var(--star); }

.row-main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.row-main a {
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
}
.row-main a:hover { color: var(--accent); text-decoration: underline; }
.row-notes { color: var(--muted); font-size: 12px; margin-top: 1px; }

.row-tags { display: flex; gap: 5px; flex-wrap: wrap; max-width: 30%; justify-content: flex-end; }
.pill {
  font-size: 11px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 2px 8px;
  border-radius: 10px;
  white-space: nowrap;
}

.row-actions { display: flex; gap: 8px; flex-shrink: 0; }
.row-actions button {
  border: none;
  background: none;
  cursor: pointer;
  color: var(--muted);
  font-size: 13px;
}
.row-actions button:hover { color: var(--accent); }

.empty-state {
  padding: 40px 24px;
  text-align: center;
  color: var(--muted);
}

/* Modals */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}
.modal {
  background: var(--card);
  border-radius: 10px;
  padding: 24px;
  width: 340px;
  max-height: 90vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.modal.wide { width: 440px; }
.modal h2 { margin: 0 0 10px; font-size: 17px; }
.modal label { font-size: 12px; color: var(--muted); margin-top: 8px; }
.modal input[type=text], .modal input[type=password], .modal select, .modal textarea {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  width: 100%;
}
.modal-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 16px; }
.modal-error { color: var(--danger); font-size: 12px; min-height: 16px; }

.modal-hint { font-size: 12px; color: var(--muted); margin: 0 0 8px; }

.topic-manage-list { display: flex; flex-direction: column; gap: 6px; max-height: 320px; overflow-y: auto; }
.topic-manage-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px; font-size: 13px;
}
.topic-manage-row .count { color: var(--muted); font-size: 12px; margin-right: 10px; }
.topic-manage-row button {
  border: none; background: none; color: var(--danger); cursor: pointer; font-size: 12px;
}
.topic-manage-row button:disabled { color: var(--border); cursor: not-allowed; }

.topic-checkboxes { display: flex; flex-wrap: wrap; gap: 6px; margin: 4px 0; }
.topic-checkboxes label {
  display: flex; align-items: center; gap: 4px;
  font-size: 12px; color: var(--text);
  border: 1px solid var(--border); border-radius: 14px; padding: 3px 10px;
  margin: 0;
}