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

:root {
  --win-gray: #C0C0C0;
  --win-dark: #808080;
  --win-darker: #404040;
  --win-light: #DFDFDF;
  --win-white: #FFFFFF;
  --win-blue: #000080;
  --win-blue-light: #1084D0;
  --win-bg: #008080;
  --border-raised: inset -1px -1px 0 #000, inset -2px -2px 0 var(--win-dark), inset 1px 1px 0 var(--win-white), inset 2px 2px 0 var(--win-light);
  --border-sunken: inset 1px 1px 0 #000, inset 2px 2px 0 var(--win-dark), inset -1px -1px 0 var(--win-white), inset -2px -2px 0 var(--win-light);
  --border-field: inset 1px 1px 0 var(--win-dark), inset -1px -1px 0 var(--win-white);
}

body {
  font-family: 'IBM Plex Mono', 'Tahoma', 'MS Sans Serif', sans-serif;
  background: var(--win-bg);
  min-height: 100vh;
  color: #000;
  font-size: 13px;
}

#app {
  max-width: 1200px;
  margin: 8px auto;
  background: var(--win-gray);
  box-shadow: var(--border-raised);
  display: flex;
  flex-direction: column;
  min-height: calc(100vh - 16px);
}

/* Title Bar */
.win-titlebar {
  background: linear-gradient(90deg, var(--win-blue), var(--win-blue-light));
  color: white;
  padding: 3px 4px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 700;
  font-size: 13px;
  user-select: none;
}

.win-titlebar-left {
  display: flex;
  align-items: center;
  gap: 4px;
}

.win-icon {
  font-size: 14px;
}

.win-titlebar-buttons {
  display: flex;
  gap: 2px;
}

.win-titlebar-buttons button {
  width: 18px;
  height: 16px;
  font-size: 9px;
  background: var(--win-gray);
  border: none;
  box-shadow: var(--border-raised);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: inherit;
  padding: 0;
  line-height: 1;
}

.win-titlebar-buttons button:active {
  box-shadow: var(--border-sunken);
}

/* Menu Bar */
.win-menubar {
  background: var(--win-gray);
  padding: 2px 4px;
  border-bottom: 1px solid var(--win-dark);
  display: flex;
  gap: 0;
}

.win-menu-item {
  padding: 2px 8px;
  cursor: default;
  user-select: none;
}

.win-menu-item:hover {
  background: var(--win-blue);
  color: white;
}

/* Main Content */
.main-content {
  display: flex;
  flex: 1;
  gap: 0;
  padding: 6px;
  overflow: auto;
}

.left-column {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.right-column {
  width: 280px;
  flex-shrink: 0;
  margin-left: 6px;
}

/* Header */
.header-section {
  text-align: center;
  padding: 10px 8px 6px;
}

.header-section h1 {
  font-family: 'VT323', monospace;
  font-size: 32px;
  color: var(--win-blue);
  letter-spacing: 1px;
  line-height: 1;
}

.subtitle {
  font-size: 11px;
  color: var(--win-darker);
  font-style: italic;
  margin-top: 2px;
}

/* Drop Zone */
.drop-zone {
  background: var(--win-gray);
  box-shadow: var(--border-sunken);
  padding: 3px;
  cursor: pointer;
}

.drop-zone.drag-over .drop-zone-inner {
  background: #FFFFDD;
  border-color: var(--win-blue);
}

.drop-zone-inner {
  border: 2px dashed var(--win-dark);
  padding: 24px 16px;
  text-align: center;
  background: var(--win-white);
  transition: background 0.15s;
}

.drop-icon {
  font-size: 40px;
  margin-bottom: 8px;
}

.drop-title {
  font-weight: 700;
  font-size: 14px;
  margin-bottom: 4px;
}

.drop-subtitle {
  font-size: 11px;
  color: var(--win-darker);
  font-style: italic;
  margin-bottom: 12px;
}

.browse-btn {
  display: inline-block;
  background: var(--win-gray);
  box-shadow: var(--border-raised);
  padding: 4px 20px;
  font-family: inherit;
  font-size: 13px;
  cursor: pointer;
  user-select: none;
}

.browse-btn:active {
  box-shadow: var(--border-sunken);
  padding: 5px 19px 3px 21px;
}

.drop-accept {
  font-size: 10px;
  color: var(--win-dark);
  margin-top: 10px;
}

/* Player Section */
.player-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.player-section.hidden {
  display: none;
}

.crt-container {
  padding: 4px;
}

.crt-bezel {
  position: relative;
  background: #1a1a1a;
  border-radius: 12px;
  padding: 12px 16px;
  box-shadow: 
    inset 0 0 30px rgba(0,0,0,0.8),
    0 4px 12px rgba(0,0,0,0.5),
    inset 2px 2px 4px rgba(255,255,255,0.05);
  display: inline-block;
}

#video-canvas {
  display: block;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  border-radius: 4px;
}

.scanlines {
  position: absolute;
  top: 12px;
  left: 16px;
  right: 16px;
  bottom: 12px;
  border-radius: 4px;
  pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 1px,
    rgba(0, 0, 0, 0.15) 1px,
    rgba(0, 0, 0, 0.15) 2px
  );
  z-index: 2;
}

.scanlines.hidden {
  display: none;
}

/* Player Controls */
.player-controls {
  background: var(--win-gray);
  box-shadow: var(--border-raised);
  padding: 6px 8px;
  width: 100%;
  max-width: 520px;
}

.controls-row {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 4px;
}

.controls-row:last-child {
  margin-bottom: 0;
}

.controls-secondary {
  flex-wrap: wrap;
}

.ctrl-btn {
  background: var(--win-gray);
  box-shadow: var(--border-raised);
  border: none;
  padding: 3px 10px;
  font-family: inherit;
  font-size: 14px;
  cursor: pointer;
  user-select: none;
  min-width: 32px;
  text-align: center;
}

.ctrl-btn.small {
  font-size: 11px;
  padding: 2px 8px;
}

.ctrl-btn:active {
  box-shadow: var(--border-sunken);
}

.frame-counter {
  margin-left: auto;
  font-size: 11px;
  font-family: 'IBM Plex Mono', monospace;
  color: var(--win-darker);
}

.frame-slider {
  flex: 1;
  height: 18px;
  cursor: pointer;
}

.ctrl-label {
  font-size: 11px;
  display: flex;
  align-items: center;
  gap: 3px;
  margin-right: 8px;
}

.win-select {
  font-family: inherit;
  font-size: 11px;
  background: var(--win-white);
  border: none;
  box-shadow: var(--border-field);
  padding: 1px 2px;
}

.fps-display {
  font-size: 11px;
  font-family: 'IBM Plex Mono', monospace;
  color: var(--win-darker);
  margin-left: auto;
  margin-right: 6px;
}

/* Log Panel */
.log-panel {
  display: flex;
  flex-direction: column;
}

.log-titlebar {
  background: var(--win-gray);
  padding: 2px 6px;
  font-weight: 700;
  font-size: 12px;
  box-shadow: var(--border-raised);
}

.log-content {
  background: #0C0C0C;
  color: #33FF33;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  padding: 6px 8px;
  height: 160px;
  overflow-y: auto;
  box-shadow: var(--border-sunken);
  line-height: 1.5;
}

.log-line {
  white-space: pre-wrap;
  word-break: break-all;
}

.log-line.error {
  color: #FF5555;
}

.log-line.warn {
  color: #FFFF55;
}

.log-line.info {
  color: #55FFFF;
}

.log-line.success {
  color: #55FF55;
}

/* Info Panel */
.info-section {
  background: var(--win-gray);
  box-shadow: var(--border-raised);
}

.info-titlebar {
  background: var(--win-gray);
  padding: 4px 8px;
  font-weight: 700;
  font-size: 12px;
  cursor: pointer;
  user-select: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: var(--border-raised);
}

.info-content {
  padding: 6px;
  max-height: 600px;
  overflow-y: auto;
}

.info-content.collapsed {
  display: none;
}

.info-group {
  margin-bottom: 8px;
}

.info-group h3 {
  font-size: 11px;
  font-weight: 700;
  padding: 2px 4px;
  background: var(--win-blue);
  color: white;
  margin-bottom: 4px;
}

.info-data {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  background: var(--win-white);
  padding: 4px 6px;
  box-shadow: var(--border-field);
  max-height: 150px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-all;
  line-height: 1.5;
}

.tree-view {
  font-size: 10px;
}

.palette-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1px;
  padding: 4px;
  background: var(--win-white);
  box-shadow: var(--border-field);
}

.palette-swatch {
  width: 12px;
  height: 12px;
  border: 1px solid #000;
}

.frame-list {
  max-height: 200px;
}

/* Footer */
.footer {
  background: var(--win-gray);
  padding: 4px 8px;
  text-align: center;
  font-size: 11px;
  border-top: 1px solid var(--win-dark);
  box-shadow: inset 0 1px 0 var(--win-white);
}

.footer a {
  color: var(--win-blue);
  text-decoration: underline;
}

.footer a:hover {
  color: #0000FF;
}

/* Responsive */
@media (max-width: 768px) {
  body { font-size: 12px; }
  
  #app {
    margin: 0;
    min-height: 100vh;
  }
  
  .main-content {
    flex-direction: column;
    padding: 4px;
  }
  
  .right-column {
    width: 100%;
    margin-left: 0;
    margin-top: 6px;
  }
  
  .header-section h1 {
    font-size: 24px;
  }
  
  .drop-zone-inner {
    padding: 16px 10px;
  }
  
  .drop-icon { font-size: 30px; }
  .drop-title { font-size: 12px; }
  
  .crt-bezel {
    padding: 8px 10px;
  }
  
  .player-controls {
    max-width: 100%;
  }
}