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

/* ---- Theme variables ---- */
:root {
  --panel-width: 340px;
  --scrollbar-w: 10px;
  --accent: #e94560;
  --accent-hover: #c73550;

  /* Dark theme (default) */
  --bg: #1a1a2e;
  --bg-panel: #16213e;
  --bg-input: #0f3460;
  --text: #e0e0e0;
  --text-dim: #8888aa;
  --grid-text: #c8c8d8;
  --border: #2a2a4a;
  --scrollbar-thumb: #6a6a8a;
  --scrollbar-thumb-hover: #8a8aaa;
  --hover-bg: rgba(255,255,255,0.03);
  --hover-bg-strong: rgba(255,255,255,0.04);
  --active-bg: rgba(255,255,255,0.08);
  --scrolltrack-bg: rgba(255,255,255,0.03);
  --card-search-btn-disabled: #555;
}

/* Light theme */
[data-theme="light"] {
  --bg: #f0f2f5;
  --bg-panel: #ffffff;
  --bg-input: #e8ecf1;
  --text: #1a1a2e;
  --text-dim: #6b7280;
  --grid-text: #2d3748;
  --border: #d1d5db;
  --scrollbar-thumb: #c0c4cc;
  --scrollbar-thumb-hover: #a0a4ac;
  --hover-bg: rgba(0,0,0,0.03);
  --hover-bg-strong: rgba(0,0,0,0.05);
  --active-bg: rgba(0,0,0,0.08);
  --scrolltrack-bg: rgba(0,0,0,0.04);
  --card-search-btn-disabled: #b0b0b0;
}

/* Auto: respect system preference when no explicit theme is set */
@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    --bg: #f0f2f5;
    --bg-panel: #ffffff;
    --bg-input: #e8ecf1;
    --text: #1a1a2e;
    --text-dim: #6b7280;
    --grid-text: #2d3748;
    --border: #d1d5db;
    --scrollbar-thumb: #c0c4cc;
    --scrollbar-thumb-hover: #a0a4ac;
    --hover-bg: rgba(0,0,0,0.03);
    --hover-bg-strong: rgba(0,0,0,0.05);
    --active-bg: rgba(0,0,0,0.08);
    --scrolltrack-bg: rgba(0,0,0,0.04);
    --card-search-btn-disabled: #b0b0b0;
  }
}

html, body {
  height: 100%;
  font-family: system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow: hidden;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

#app {
  display: flex;
  height: 100vh;
  width: 100vw;
}

/* ---- Grid Area ---- */
#grid-area {
  flex: 1;
  overflow: hidden;
  position: relative;
  padding: 12px;
}

#drop-zone {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  border: 3px dashed var(--border);
  border-radius: 12px;
  margin: 24px;
  transition: border-color 0.2s, background 0.2s;
  z-index: 10;
}

#drop-zone.drag-over {
  border-color: var(--accent);
  background: rgba(233, 69, 96, 0.08);
}

#drop-zone.hidden { display: none; }

#drop-zone .icon { font-size: 64px; opacity: 0.4; }
#drop-zone p { font-size: 1.1rem; color: var(--text-dim); }

#drop-zone label {
  padding: 10px 28px;
  background: var(--accent);
  color: #fff;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
  transition: background 0.2s;
}
#drop-zone label:hover { background: var(--accent-hover); }
#drop-zone input[type="file"] { display: none; }

/* ---- Canvas + custom scrollbar ---- */
#grid-container {
  position: relative;
  display: none;
  height: 100%;
  overflow: hidden;
}

#grid-canvas {
  display: block;
  position: absolute;
  top: 0;
  left: 0;
}

#scrollbar-track {
  position: absolute;
  top: 0;
  right: 0;
  width: var(--scrollbar-w);
  height: 100%;
  background: var(--scrolltrack-bg);
  cursor: pointer;
  z-index: 5;
}

#scrollbar-thumb {
  position: absolute;
  top: 0;
  left: 1px;
  width: calc(var(--scrollbar-w) - 2px);
  min-height: 24px;
  background: var(--scrollbar-thumb);
  border-radius: 4px;
  cursor: grab;
  transition: background 0.15s;
}
#scrollbar-thumb:hover,
#scrollbar-thumb.dragging { background: var(--scrollbar-thumb-hover); }
#scrollbar-thumb.dragging { cursor: grabbing; }

/* ---- Control Panel ---- */
#panel {
  width: var(--panel-width);
  min-width: var(--panel-width);
  background: var(--bg-panel);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

#panel-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
}

#panel-header h1 {
  font-size: 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
  min-width: 0;
}

#panel-header h1 span.subtitle {
  font-size: 0.7rem;
  color: var(--text-dim);
  font-weight: normal;
}

/* ---- Theme toggle ---- */
#theme-toggle {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2px;
  margin-left: 8px;
}

#theme-toggle button {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 0.85rem;
  padding: 3px 4px;
  border-radius: 3px;
  line-height: 1;
  transition: background 0.15s, color 0.15s;
}

#theme-toggle button:hover {
  color: var(--text);
}

#theme-toggle button.active {
  background: var(--accent);
  color: #fff;
}

#file-info {
  font-size: 0.8rem;
  color: var(--text-dim);
  padding: 8px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 8px;
}

#file-info-text {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

#load-file-btn {
  flex-shrink: 0;
  padding: 3px 10px;
  background: var(--bg-input);
  color: var(--text-dim);
  border: 1px solid var(--border);
  border-radius: 3px;
  font-size: 0.75rem;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}
#load-file-btn:hover {
  border-color: var(--accent);
  color: var(--text);
}

/* ---- Search cards area (scrollable) ---- */
#searches-area {
  flex: 1;
  overflow-y: auto;
  padding: 0;
}

#add-search-btn {
  display: block;
  width: calc(100% - 40px);
  margin: 12px 20px;
  padding: 8px;
  background: var(--bg-input);
  color: var(--text-dim);
  border: 1px dashed var(--border);
  border-radius: 4px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}
#add-search-btn:hover {
  border-color: var(--accent);
  color: var(--text);
}
#add-search-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ---- Individual search card ---- */
.search-card {
  border-bottom: 1px solid var(--border);
}

.search-card-header {
  display: flex;
  align-items: center;
  padding: 10px 20px;
  gap: 8px;
  cursor: pointer;
  user-select: none;
  transition: background 0.15s;
}
.search-card-header:hover { background: var(--hover-bg); }

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

.search-card-title {
  flex: 1;
  font-size: 0.9rem;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.search-card-count {
  font-size: 0.75rem;
  color: var(--text-dim);
  flex-shrink: 0;
}

.search-card-remove {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 1.1rem;
  padding: 0 4px;
  line-height: 1;
  transition: color 0.15s;
  flex-shrink: 0;
}
.search-card-remove:hover { color: var(--accent); }

.search-card-body {
  padding: 0 20px 12px;
  display: none;
}
.search-card.expanded .search-card-body { display: block; }

.search-card-body label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 4px;
}

.search-card-body input[type="text"],
.search-card-body input[type="number"] {
  width: 100%;
  padding: 6px 8px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s;
}
.search-card-body input:focus { border-color: var(--accent); }

.search-card-body .spacing-row { display: flex; gap: 8px; margin-top: 8px; }
.search-card-body .spacing-row > div { flex: 1; }

.search-card-body .card-search-btn {
  width: 100%;
  margin-top: 8px;
  padding: 7px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 4px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}
.search-card-body .card-search-btn:hover { background: var(--accent-hover); }
.search-card-body .card-search-btn:disabled { background: var(--card-search-btn-disabled); cursor: not-allowed; }

.search-card-body .card-progress {
  display: none;
  margin-top: 6px;
  height: 4px;
  background: var(--bg-input);
  border-radius: 2px;
  overflow: hidden;
}
.search-card-body .card-progress.visible { display: block; }
.search-card-body .card-progress-fill {
  height: 100%;
  width: 0%;
  background: var(--accent);
  border-radius: 2px;
  transition: width 0.1s;
}

.search-card-body .card-status {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-top: 6px;
}

/* ---- Results within a card ---- */
.search-card-results {
  list-style: none;
  max-height: 200px;
  overflow-y: auto;
  margin-top: 6px;
}

.search-card-results li {
  padding: 6px 0;
  cursor: pointer;
  border-bottom: 1px solid var(--hover-bg-strong);
  transition: background 0.1s;
  font-size: 0.85rem;
}

.search-card-results li:hover { background: var(--hover-bg-strong); }

.search-card-results li.active {
  background: var(--active-bg);
}

.search-card-results li .result-word {
  font-family: 'Consolas', monospace;
  font-weight: bold;
  letter-spacing: 1px;
}

.search-card-results li .result-detail {
  font-size: 0.7rem;
  color: var(--text-dim);
  margin-top: 1px;
}

/* ---- Panel footer ---- */
#panel-footer {
  padding: 10px 20px;
  font-size: 0.7rem;
  color: var(--text-dim);
  text-align: center;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

/* Scrollbar styling for panel */
#searches-area::-webkit-scrollbar,
.search-card-results::-webkit-scrollbar { width: 6px; }
#searches-area::-webkit-scrollbar-track,
.search-card-results::-webkit-scrollbar-track { background: transparent; }
#searches-area::-webkit-scrollbar-thumb,
.search-card-results::-webkit-scrollbar-thumb { background: var(--scrollbar-thumb); border-radius: 3px; }