*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #1a1a2e;
  --surface: #16213e;
  --surface-hover: #1a2745;
  --text: #e0e0e0;
  --text-muted: #888;
  --accent: #4fc3f7;
  --accent-hover: #39a8db;
  --danger: #ef5350;
  --danger-hover: #d32f2f;
  --border: #2a2a4a;
  --input-bg: #0f1529;
  --radius: 8px;
  --copied-bg: #388e3c;
}

[data-theme="light"] {
  --bg: #f5f5f5;
  --surface: #ffffff;
  --surface-hover: #f0f0f0;
  --text: #212121;
  --text-muted: #757575;
  --accent: #1976d2;
  --accent-hover: #1565c0;
  --danger: #d32f2f;
  --danger-hover: #b71c1c;
  --border: #e0e0e0;
  --input-bg: #ffffff;
  --copied-bg: #2e7d32;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-tap-highlight-color: transparent;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 10;
}

header h1 {
  font-size: 1.1rem;
  font-weight: 600;
}

.header-controls {
  display: flex;
  gap: 8px;
  align-items: center;
}

.header-controls select,
.header-controls > button,
.export-dropdown-wrap > button {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 10px;
  font-size: 0.85rem;
  cursor: pointer;
}

.header-controls > button:hover,
.export-dropdown-wrap > button:hover {
  background: var(--surface-hover);
}

#export-btn,
#share-btn {
  color: var(--accent);
  font-weight: 600;
}

/* --- Tag Bar --- */
#tag-bar {
  position: sticky;
  top: 49px;
  z-index: 9;
  background: var(--bg);
  display: flex;
  gap: 6px;
  padding: 8px 16px;
  overflow-x: auto;
  border-bottom: 1px solid var(--border);
  -ms-overflow-style: none;
  scrollbar-width: none;
}

#tag-bar::-webkit-scrollbar {
  display: none;
}

.tag-chip {
  flex-shrink: 0;
  padding: 4px 12px;
  border-radius: 16px;
  border: 1.5px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 0.8rem;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s, border-color 0.15s;
}

.tag-chip:hover {
  background: var(--surface-hover);
}

.tag-chip.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.tag-chip.add-tag {
  border-style: dashed;
  color: var(--text-muted);
}

.tag-chip.mini {
  padding: 2px 8px;
  font-size: 0.7rem;
  border-radius: 10px;
}

/* --- Tag dropdown on cards --- */
.tag-dropdown {
  position: absolute;
  top: 8px;
  right: 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 0;
  min-width: 160px;
  z-index: 20;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.tag-dropdown label {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  font-size: 0.8rem;
  cursor: pointer;
}

.tag-dropdown label:hover {
  background: var(--surface-hover);
}

.tag-dropdown .tag-color-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* --- Tag color picker --- */
.tag-color-picker {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 12px 0;
}

.tag-color-swatch {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition: border-color 0.15s, transform 0.15s;
}

.tag-color-swatch:hover {
  transform: scale(1.15);
}

.tag-color-swatch.selected {
  border-color: var(--text);
  transform: scale(1.15);
}

/* --- Export dropdown --- */
.export-dropdown-wrap {
  position: relative;
}

.dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 4px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 4px 0;
  min-width: 140px;
  z-index: 20;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.dropdown-menu.open {
  display: block;
}

.dropdown-menu button {
  display: block;
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  color: var(--text);
  padding: 8px 14px;
  font-size: 0.85rem;
  cursor: pointer;
}

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

/* --- Modal --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 16px;
}

.modal-overlay[hidden] {
  display: none !important;
}

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  max-width: 480px;
  width: 100%;
  max-height: 80vh;
  overflow-y: auto;
}

.modal.modal-sm {
  max-width: 340px;
}

.modal h2 {
  font-size: 1.1rem;
  margin-bottom: 12px;
}

.modal input[type="text"] {
  width: 100%;
  background: var(--input-bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 12px;
  font-size: 0.95rem;
  outline: none;
}

.modal input[type="text"]:focus {
  border-color: var(--accent);
}

.modal-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 16px;
}

.modal-actions button {
  padding: 8px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 0.85rem;
  cursor: pointer;
}

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

.btn-primary {
  background: var(--accent) !important;
  color: #fff !important;
  border-color: var(--accent) !important;
}

.btn-primary:hover {
  background: var(--accent-hover) !important;
}

.btn-danger {
  background: var(--danger) !important;
  color: #fff !important;
  border-color: var(--danger) !important;
  margin-right: auto;
}

.btn-danger:hover {
  background: var(--danger-hover) !important;
}

#import-preview {
  max-height: 200px;
  overflow-y: auto;
  margin: 12px 0;
  font-size: 0.85rem;
}

#import-preview .import-item {
  padding: 4px 0;
  border-bottom: 1px solid var(--border);
}

/* --- Main --- */
main {
  max-width: 600px;
  margin: 0 auto;
  padding: 16px;
}

.input-area {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

#url-input {
  flex: 1;
  background: var(--input-bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 12px;
  font-size: 1rem;
  outline: none;
}

#url-input:focus {
  border-color: var(--accent);
}

#add-btn {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: 10px 16px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}

#add-btn:hover {
  background: var(--accent-hover);
}

#add-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.status {
  padding: 8px 12px;
  border-radius: var(--radius);
  margin-bottom: 12px;
  font-size: 0.9rem;
}

.status.error {
  background: var(--danger);
  color: #fff;
}

.status.info {
  background: var(--accent);
  color: #fff;
}

.empty-state {
  text-align: center;
  color: var(--text-muted);
  margin-top: 48px;
  font-size: 0.95rem;
}

#cards {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
  cursor: pointer;
  position: relative;
  transition: background 0.15s;
}

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

.card:active {
  transform: scale(0.99);
}

.card .label {
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 4px;
  padding-right: 56px;
  word-break: break-word;
}

.card .coords {
  font-family: "SF Mono", "Fira Code", "Consolas", monospace;
  font-size: 0.9rem;
  color: var(--accent);
}

.card .card-meta {
  display: flex;
  gap: 8px;
  align-items: baseline;
  margin-top: 4px;
}

.card .source {
  font-size: 0.75rem;
  color: var(--accent);
  opacity: 0.7;
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
}

.card .raw {
  font-size: 0.75rem;
  color: var(--text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.card .card-tags {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  margin-top: 6px;
}

.card .card-actions {
  position: absolute;
  top: 8px;
  right: 8px;
  display: flex;
  gap: 2px;
}

.card .tag-btn,
.card .delete-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 4px;
  line-height: 1;
  border-radius: 4px;
}

.card .tag-btn:hover {
  color: var(--accent);
  background: rgba(79, 195, 247, 0.1);
}

.card .delete-btn:hover {
  color: var(--danger);
  background: rgba(239, 83, 80, 0.1);
}

.card.copied {
  border-color: var(--copied-bg);
}

.card .copied-flash {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--copied-bg);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 1rem;
  border-radius: var(--radius);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}

.card .copied-flash.show {
  opacity: 0.9;
}

/* --- Predefined tag colors --- */
.tag-c0 { --tag-color: #ef5350; }
.tag-c1 { --tag-color: #ab47bc; }
.tag-c2 { --tag-color: #5c6bc0; }
.tag-c3 { --tag-color: #29b6f6; }
.tag-c4 { --tag-color: #26a69a; }
.tag-c5 { --tag-color: #66bb6a; }
.tag-c6 { --tag-color: #ffa726; }
.tag-c7 { --tag-color: #8d6e63; }
.tag-c8 { --tag-color: #ec407a; }
.tag-c9 { --tag-color: #78909c; }