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

:root {
  --bg-primary: #1a1a2e;
  --bg-secondary: #16213e;
  --bg-panel: #0f3460;
  --accent: #e94560;
  --text-primary: #eee;
  --text-secondary: #aab;
  --border: #2a2a4a;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  user-select: none;
}

header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  padding: 8px 16px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
}

header h1 {
  font-size: 16px;
  font-weight: 600;
  white-space: nowrap;
  color: var(--accent);
}

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

.separator {
  width: 1px;
  height: 24px;
  background: var(--border);
  margin: 0 4px;
}

button {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 6px 14px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 13px;
  transition: background 0.15s, border-color 0.15s;
}

button:hover {
  background: #1a4a7a;
  border-color: #3a5a8a;
}

button.active {
  background: var(--accent);
  border-color: var(--accent);
}

#frame-controls, #series-controls {
  font-size: 13px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
}

#frame-controls.hidden, #series-controls.hidden {
  display: none;
}

#frame-slider, #series-slider {
  width: 120px;
  accent-color: var(--accent);
}

main {
  display: flex;
  flex: 1;
  overflow: hidden;
}

#viewport-container {
  flex: 1;
  position: relative;
  background: #000;
  overflow: hidden;
}

#viewport {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: none;
}

.overlay {
  position: absolute;
  padding: 10px;
  font-size: 12px;
  font-family: 'Courier New', monospace;
  color: #ff8;
  pointer-events: none;
  text-shadow: 1px 1px 2px rgba(0,0,0,0.8);
  white-space: pre-line;
  line-height: 1.5;
}

#overlay-top-left { top: 0; left: 0; }
#overlay-top-right { top: 0; right: 0; text-align: right; }
#overlay-bottom-left { bottom: 0; left: 0; }
#overlay-bottom-right { bottom: 0; right: 0; text-align: right; }

.drop-zone {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
}

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

.drop-zone.dragover {
  background: rgba(233, 69, 96, 0.1);
  border: 2px dashed var(--accent);
}

.drop-zone-content {
  text-align: center;
  color: var(--text-secondary);
}

.drop-zone-content svg {
  margin-bottom: 16px;
  opacity: 0.5;
}

.drop-zone-content p {
  font-size: 18px;
  margin-bottom: 6px;
}

.drop-zone-content .sub {
  font-size: 14px;
  opacity: 0.7;
}

/* Loading overlay */
#loading-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.7);
  z-index: 20;
}

#loading-overlay.hidden {
  display: none;
}

#loading-box {
  text-align: center;
}

#loading-bar {
  width: 240px;
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 10px;
}

#loading-progress {
  height: 100%;
  width: 0;
  background: var(--accent);
  border-radius: 3px;
  transition: width 0.15s;
}

#loading-text {
  font-size: 13px;
  color: var(--text-secondary);
}

/* Metadata panel */
#metadata-panel {
  width: 340px;
  background: var(--bg-secondary);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

#metadata-panel h2 {
  font-size: 14px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  font-weight: 600;
}

#tag-search-container {
  padding: 8px 14px;
  border-bottom: 1px solid var(--border);
}

#tag-search {
  width: 100%;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 13px;
  outline: none;
}

#tag-search:focus {
  border-color: var(--accent);
}

#metadata-content {
  flex: 1;
  overflow-y: auto;
  padding: 8px 0;
  font-size: 12px;
  font-family: 'Courier New', monospace;
}

#metadata-content .placeholder-text {
  text-align: center;
  color: var(--text-secondary);
  padding: 40px 14px;
}

.tag-row {
  display: flex;
  padding: 3px 14px;
  gap: 8px;
  border-bottom: 1px solid rgba(255,255,255,0.03);
}

.tag-row:hover {
  background: rgba(255,255,255,0.04);
}

.tag-id {
  color: var(--accent);
  flex-shrink: 0;
  width: 100px;
}

.tag-name {
  color: var(--text-secondary);
  flex-shrink: 0;
  width: 140px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tag-value {
  color: var(--text-primary);
  word-break: break-all;
  flex: 1;
}

/* Scrollbar */
#metadata-content::-webkit-scrollbar {
  width: 6px;
}

#metadata-content::-webkit-scrollbar-track {
  background: transparent;
}

#metadata-content::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

@media (max-width: 800px) {
  #metadata-panel {
    display: none;
  }
}