:root {
  --bg: #fafafa;
  --surface: #ffffff;
  --surface-hover: #f0f0f0;
  --text: #18181b;
  --text-muted: #71717a;
  --border: #e4e4e7;
  --accent: #18181b;
  --accent-contrast: #ffffff;
  --accent-soft: #f0f0f0;
  --select: #2563eb;
  --select-soft: #eff6ff;
  --shadow: 0 1px 2px rgba(0,0,0,0.03), 0 4px 12px rgba(0,0,0,0.05);
  font-family: -apple-system, BlinkMacSystemFont, "Pretendard", "Segoe UI", Roboto, "Noto Sans KR", sans-serif;
}

* { box-sizing: border-box; }

html, body {
  min-height: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  transition: background 0.2s, color 0.2s;
}

.primary-nav {
  display: flex;
  gap: 4px;
  padding: 10px 32px 0;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.primary-nav-item {
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  text-decoration: none;
  border-bottom: 2px solid transparent;
}

.primary-nav-item:hover { color: var(--text); }

.primary-nav-item.active {
  color: var(--text);
  border-bottom-color: var(--text);
}

.topbar {
  padding: 24px 32px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.topbar h1 {
  margin: 0 0 4px;
  font-size: 24px;
  letter-spacing: -0.5px;
}

.subtitle {
  margin: 0 0 18px;
  color: var(--text-muted);
  font-size: 14px;
}

.topbar-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}

.date-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.date-bar-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-muted);
}

.date-bar input[type="date"] {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: 8px;
  padding: 6px 10px;
  font-size: 13px;
  font-family: inherit;
}

.date-sep { color: var(--text-muted); }

.date-bar button {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 13px;
  cursor: pointer;
}

.date-bar button:hover { background: var(--surface-hover); }

.date-reset {
  color: var(--text-muted);
}

.date-status {
  font-size: 12px;
  color: var(--text-muted);
  margin-left: auto;
}

.tabs {
  display: flex;
  gap: 2px;
  background: var(--surface-hover);
  padding: 3px;
  border-radius: 10px;
}

.tab {
  border: none;
  background: transparent;
  color: var(--text-muted);
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
}

.tab:hover { color: var(--text); }

.tab.active {
  background: var(--surface);
  color: var(--text);
  font-weight: 600;
  box-shadow: var(--shadow);
}

.actions { display: flex; gap: 8px; }

.actions button {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 7px 14px;
  border-radius: 8px;
  font-size: 13px;
  cursor: pointer;
}

.actions button:hover { background: var(--surface-hover); }

.trendbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 16px;
  padding: 10px 32px;
  background: var(--accent-soft);
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.4);
  padding: 20px;
}

.modal-overlay.hidden { display: none; }

.modal {
  position: relative;
  width: 100%;
  max-width: 440px;
  background: var(--surface);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 28px 24px 22px;
}

.modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  border: none;
  background: transparent;
  font-size: 18px;
  line-height: 1;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
}

.modal-close:hover { color: var(--text); }

.modal-title {
  margin: 0 0 4px;
  font-size: 17px;
}

.modal-sub {
  margin: 0 0 18px;
  font-size: 13px;
  color: var(--text-muted);
}

.method-options {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.method-option {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  width: 100%;
  text-align: left;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 10px;
  padding: 12px 14px;
  cursor: pointer;
  font: inherit;
  color: inherit;
  transition: border-color 0.15s, background 0.15s;
}

.method-option:hover:not(:disabled) {
  border-color: var(--select);
  background: var(--select-soft);
}

.method-option:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.method-name {
  font-size: 14px;
  font-weight: 700;
}

.method-desc {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.5;
}

.method-copy-link {
  display: block;
  width: 100%;
  margin-top: 14px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 12px;
  text-decoration: underline;
  cursor: pointer;
  padding: 4px;
  text-align: center;
}

.method-copy-link:hover { color: var(--text); }

#trendBtn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 13px;
  cursor: pointer;
  font-weight: 600;
}

.cart-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  border-radius: 999px;
  background: var(--select);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
}

.cart-count.hidden { display: none; }

#trendBtn:hover:not(:disabled) { background: var(--surface-hover); }

#trendBtn:disabled {
  color: var(--text-muted);
  opacity: 0.55;
  cursor: not-allowed;
}

.cards {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 680px;
  margin: 0 auto;
  padding: 24px 32px 60px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 10px;
  cursor: pointer;
  transition: border-color 0.15s;
}

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

.card.selected {
  border-color: var(--select);
  box-shadow: 0 0 0 1px var(--select);
}

.card.used {
  opacity: 0.6;
}

.card.used:hover {
  opacity: 1;
}

.card-badges {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.used-badge {
  font-size: 10px;
  font-weight: 700;
  color: var(--select);
  background: var(--select-soft);
  padding: 3px 8px;
  border-radius: 6px;
  white-space: nowrap;
}

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
}

.badge {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.3px;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  white-space: nowrap;
}

.card-title {
  display: block;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  margin: 0;
  color: var(--text);
  text-decoration: none;
}

.card-title:hover { text-decoration: underline; }

.card-meta {
  font-size: 12px;
  color: var(--text-muted);
}

.card-excerpt {
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-muted);
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-summary {
  font-size: 13px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  border-radius: 8px;
  padding: 10px 12px;
  display: none;
}

.card-summary.show { display: block; }

.card-summary ul { margin: 0; padding-left: 18px; }

.keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.keyword-chip {
  font-size: 11px;
  background: var(--surface-hover);
  color: var(--text-muted);
  border: 1px solid var(--border);
  padding: 3px 8px;
  border-radius: 12px;
}

.card-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: auto;
}

.summarize-btn {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 12px;
  cursor: pointer;
  font-weight: 600;
}

.summarize-btn:hover { background: var(--surface-hover); }

.select-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-muted);
  cursor: pointer;
}

.select-label input[type="checkbox"] {
  accent-color: var(--select);
}

.select-label:has(input:checked) {
  color: var(--select);
}

.trend-body {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* Obsidian 스타일 2단 레이아웃: 좌측 SNB(히스토리 목록) + 우측 본문 */
.trend-shell {
  display: flex;
  flex: 1;
  min-height: 0;
}

.snb {
  width: 280px;
  flex-shrink: 0;
  background: var(--bg);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.snb-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 14px 12px;
}

.snb-header h2 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin: 0;
}

.snb-header-actions {
  display: flex;
  gap: 4px;
}

.icon-btn {
  border: none;
  background: transparent;
  color: var(--text-muted);
  width: 26px;
  height: 26px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.icon-btn:hover { background: var(--surface-hover); color: var(--text); }

.snb-list {
  flex: 1;
  overflow-y: auto;
  padding: 0 6px 12px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.snb-empty {
  padding: 12px 10px;
  font-size: 12px;
  color: var(--text-muted);
}

.snb-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 3px;
  width: 100%;
  text-align: left;
  border: none;
  background: transparent;
  border-radius: 8px;
  padding: 8px 10px;
  cursor: pointer;
}

.snb-item:hover { background: var(--surface-hover); }

.snb-item.active {
  background: var(--surface);
  box-shadow: var(--shadow);
}

.snb-item-date {
  font-size: 11px;
  color: var(--text-muted);
}

.trend-main {
  flex: 1;
  overflow-y: auto;
  padding: 36px 40px 60px;
  background: var(--surface);
}

.trend-current {
  max-width: 700px;
  margin: 0 auto;
}

.result-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.result-count { color: var(--text-muted); }

.selected-items-section {
  margin-bottom: 20px;
}

.selected-items-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 8px;
  padding: 8px 12px;
  margin: 0 0 8px;
  cursor: pointer;
  font: inherit;
  color: inherit;
  transition: background 0.15s, border-color 0.15s;
}

.selected-items-toggle:hover {
  background: var(--surface-hover);
  border-color: var(--text-muted);
}

.selected-items-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.selected-items-toggle:hover .selected-items-label {
  color: var(--text);
}

.selected-items-count {
  color: var(--text);
}

.selected-items-chevron {
  font-size: 11px;
  color: var(--text-muted);
  transition: transform 0.15s;
}

.selected-items-section.collapsed .selected-items-list {
  display: none;
}

.selected-items-section.collapsed .selected-items-chevron {
  transform: rotate(-90deg);
}

.selected-items-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.selected-item-row {
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  padding: 8px 12px;
  text-decoration: none;
  color: var(--text-muted);
}

a.selected-item-row:hover {
  background: var(--surface-hover);
  border-color: var(--text-muted);
}

a.selected-item-row:hover .selected-item-title {
  text-decoration: underline;
}

.selected-item-row.no-link {
  cursor: default;
}

.selected-item-title {
  font-size: 13px;
  line-height: 1.4;
  flex: 1;
}

.selected-item-arrow {
  font-size: 12px;
  color: var(--text-muted);
  flex-shrink: 0;
}

.trend-intro {
  font-size: 15.5px;
  font-weight: 500;
  line-height: 1.7;
  color: var(--text);
  background: var(--surface-hover);
  border-radius: 8px;
  padding: 14px 16px;
  margin: 0 0 18px;
}

.insight-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.insight-card {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 22px;
}

.insight-slot {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: var(--text);
  background: var(--surface-hover);
  padding: 4px 10px;
  border-radius: 6px;
  margin-bottom: 8px;
}

.insight-row {
  margin-top: 16px;
}

.insight-label {
  display: block;
  font-size: 11px;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.3px;
  margin-bottom: 5px;
}

.insight-row p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
}

.insight-row.critical {
  border-top: 1px dashed var(--border);
  padding-top: 14px;
}

.close-btn {
  position: absolute;
  top: 16px;
  right: 16px;
  border: none;
  background: transparent;
  font-size: 16px;
  cursor: pointer;
  color: var(--text-muted);
}

#trendContent p { line-height: 1.7; font-size: 14px; }

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text);
  color: var(--bg);
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 13px;
  z-index: 60;
  transition: opacity 0.2s;
}

.toast.hidden { display: none; }

.empty-state {
  text-align: center;
  color: var(--text-muted);
  padding: 60px 20px;
  font-size: 14px;
}

.spinner {
  display: inline-block;
  width: 12px;
  height: 12px;
  border: 2px solid var(--border);
  border-top-color: var(--text);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin-right: 6px;
  vertical-align: -1px;
}

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