/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg-deepest: #0d0d0f;
  --bg-deep: #141416;
  --bg-base: #1a1a1e;
  --bg-panel: #1e1e22;
  --bg-hover: #26262c;
  --bg-active: #2e2e36;
  --border: #2a2a30;
  --border-light: #333340;

  --text-primary: #e8e8f0;
  --text-secondary: #9090a0;
  --text-muted: #606070;

  --accent: #5b8ef5;
  --accent-hover: #7aaeff;
  --accent-dim: rgba(91,142,245,0.15);
  --success: #34c759;
  --success-hover: #30d158;
  --danger: #ff453a;
  --warn: #ffa00a;

  --slider-track: #333340;
  --slider-thumb: #e8e8f0;
  --slider-fill: #5b8ef5;

  --panel-width: 280px;
  --filmstrip-width: 156px;
  --topbar-height: 44px;
  --hist-height: 72px;
}

html, body {
  height: 100%;
  overflow: hidden;
  background: var(--bg-deepest);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  font-size: 12px;
  line-height: 1.4;
  -webkit-font-smoothing: antialiased;
}

/* ===== TOPBAR ===== */
.topbar {
  height: var(--topbar-height);
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 12px;
  gap: 8px;
  position: relative;
  z-index: 100;
}
.topbar-left, .topbar-right { display: flex; align-items: center; gap: 6px; flex: 1; }
.topbar-right { justify-content: flex-end; }
.topbar-center { display: flex; gap: 6px; }

.logo { display: flex; align-items: center; gap: 8px; }
.logo-icon { font-size: 18px; color: var(--accent); }
.logo-text { font-size: 13px; font-weight: 700; letter-spacing: 0.5px; color: var(--text-primary); }

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 5px 10px; border: none; border-radius: 5px;
  font-size: 11px; font-weight: 500; cursor: pointer;
  transition: background 0.12s, color 0.12s; white-space: nowrap;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-ghost { background: var(--bg-hover); color: var(--text-secondary); border: 1px solid var(--border); }
.btn-ghost:hover { background: var(--bg-active); color: var(--text-primary); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: var(--success-hover); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-sm { padding: 3px 8px; font-size: 10px; }

.btn-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 26px; height: 26px; border: none; border-radius: 4px;
  background: transparent; color: var(--text-secondary); cursor: pointer;
  transition: background 0.1s, color 0.1s; font-size: 10px; font-weight: 600;
}
.btn-icon:hover { background: var(--bg-hover); color: var(--text-primary); }

/* ===== MAIN LAYOUT ===== */
.main-layout {
  display: grid;
  grid-template-columns: var(--filmstrip-width) 1fr var(--panel-width);
  height: calc(100vh - var(--topbar-height));
  overflow: hidden;
}

/* ===== FILMSTRIP ===== */
.filmstrip {
  background: var(--bg-deep);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.filmstrip-header {
  padding: 8px 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.filmstrip-count { color: var(--text-muted); font-size: 10px; text-transform: uppercase; letter-spacing: 0.5px; }
.filmstrip-list {
  flex: 1;
  overflow-y: auto;
  padding: 6px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.filmstrip-list::-webkit-scrollbar { width: 4px; }
.filmstrip-list::-webkit-scrollbar-track { background: transparent; }
.filmstrip-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }
.filmstrip-empty {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 8px; padding: 24px 12px; color: var(--text-muted); text-align: center;
}
.filmstrip-empty p { font-size: 10px; line-height: 1.5; }

.film-item {
  position: relative;
  border-radius: 4px;
  overflow: hidden;
  cursor: pointer;
  border: 2px solid transparent;
  transition: border-color 0.12s;
  aspect-ratio: 3/2;
  background: var(--bg-base);
  flex-shrink: 0;
}
.film-item:hover { border-color: var(--border-light); }
.film-item.active { border-color: var(--accent); }
.film-item.selected { border-color: var(--accent); }
.film-item.selected:not(.active) { border-color: rgba(91,142,245,0.5); }
.film-item img { width: 100%; height: 100%; object-fit: cover; display: block; }
.film-item .film-check {
  position: absolute; top: 4px; left: 4px;
  width: 16px; height: 16px; border-radius: 50%;
  background: rgba(0,0,0,0.6); border: 1.5px solid rgba(255,255,255,0.4);
  display: flex; align-items: center; justify-content: center;
}
.film-item.selected .film-check { background: var(--accent); border-color: var(--accent); }
.film-item .film-check::after {
  content: ''; width: 5px; height: 5px;
  background: white; border-radius: 50%; display: none;
}
.film-item.selected .film-check::after { display: block; }
.film-item .film-badge {
  position: absolute; bottom: 0; left: 0; right: 0;
  padding: 2px 4px;
  background: linear-gradient(transparent, rgba(0,0,0,0.7));
  font-size: 9px; color: rgba(255,255,255,0.6);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.film-item.edited .film-badge::before {
  content: '✦ '; color: var(--accent);
}

/* ===== PREVIEW ===== */
.preview-area {
  display: flex;
  flex-direction: column;
  background: var(--bg-deepest);
  overflow: hidden;
}
.preview-toolbar {
  height: 36px;
  background: var(--bg-deep);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 10px;
  gap: 8px;
  flex-shrink: 0;
}
.preview-tools-left, .preview-tools-right { display: flex; align-items: center; gap: 4px; flex: 1; }
.preview-tools-right { justify-content: flex-end; }
.preview-info { color: var(--text-muted); font-size: 10px; flex: 2; text-align: center; }

.tool-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 28px; height: 28px; border: none; border-radius: 4px;
  background: transparent; color: var(--text-secondary); cursor: pointer;
  transition: background 0.1s;
}
.tool-btn:hover { background: var(--bg-hover); }
.tool-btn.active { background: var(--accent-dim); color: var(--accent); }

.zoom-level { color: var(--text-muted); font-size: 10px; min-width: 32px; text-align: right; }

.preview-canvas-container {
  flex: 1;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.preview-drop-zone {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  pointer-events: none;
}
.preview-drop-zone.drag-active { background: rgba(91,142,245,0.08); border: 2px dashed var(--accent); }
.drop-zone-content {
  display: flex; flex-direction: column; align-items: center; gap: 12px;
  color: var(--text-muted); text-align: center; padding: 40px;
}
.drop-zone-content h2 { font-size: 18px; font-weight: 500; color: var(--text-secondary); }
.drop-zone-content p { font-size: 12px; }
.drop-note { font-size: 10px; color: var(--text-muted); margin-top: 4px; max-width: 280px; }

#previewCanvas {
  max-width: 100%;
  max-height: 100%;
  image-rendering: auto;
  user-select: none;
}

.histogram-bar {
  height: var(--hist-height);
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
  padding: 6px 10px;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
#histogramCanvas { flex-shrink: 0; }
.histogram-labels { color: var(--text-muted); font-size: 9px; }

/* ===== ADJUSTMENTS PANEL ===== */
.adjustments-panel {
  background: var(--bg-panel);
  border-left: 1px solid var(--border);
  overflow-y: auto;
  overflow-x: hidden;
}
.adjustments-panel::-webkit-scrollbar { width: 4px; }
.adjustments-panel::-webkit-scrollbar-track { background: transparent; }
.adjustments-panel::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.panel-section { border-bottom: 1px solid var(--border); }
.panel-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 12px; cursor: pointer; user-select: none;
  font-size: 11px; font-weight: 600; letter-spacing: 0.3px;
  color: var(--text-secondary); text-transform: uppercase;
  transition: color 0.1s;
}
.panel-header:hover { color: var(--text-primary); background: var(--bg-hover); }
.chevron { transition: transform 0.2s; }
.panel-body.collapsed .chevron { transform: rotate(-90deg); }
.panel-body {
  padding: 8px 12px 12px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.panel-body.collapsed { display: none; }

.adj-group-label {
  font-size: 9px; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.5px; color: var(--text-muted);
  margin-top: 6px; margin-bottom: 2px;
}
.adj-group-label:first-child { margin-top: 0; }

.adj-row {
  display: grid;
  grid-template-columns: 68px 1fr 28px;
  align-items: center;
  gap: 6px;
}
.adj-row label {
  font-size: 11px; color: var(--text-secondary);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.adj-value { font-size: 10px; color: var(--text-muted); text-align: right; }

/* ===== SLIDERS ===== */
.adj-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 2px;
  border-radius: 1px;
  background: var(--slider-track);
  outline: none;
  cursor: pointer;
}
.adj-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--slider-thumb);
  cursor: pointer;
  box-shadow: 0 1px 3px rgba(0,0,0,0.5);
  transition: transform 0.1s;
}
.adj-slider::-webkit-slider-thumb:hover { transform: scale(1.2); }
.adj-slider::-moz-range-thumb {
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--slider-thumb);
  cursor: pointer;
  border: none;
}
.adj-slider.mini { height: 2px; }

/* ===== TOGGLE SWITCH ===== */
.toggle-switch { position: relative; display: inline-flex; align-items: center; cursor: pointer; }
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  width: 28px; height: 16px;
  background: var(--slider-track);
  border-radius: 8px;
  position: relative;
  transition: background 0.2s;
}
.toggle-slider::before {
  content: '';
  position: absolute;
  width: 12px; height: 12px;
  left: 2px; top: 2px;
  background: var(--slider-thumb);
  border-radius: 50%;
  transition: transform 0.2s;
}
.toggle-switch input:checked + .toggle-slider { background: var(--accent); }
.toggle-switch input:checked + .toggle-slider::before { transform: translateX(12px); }

/* ===== HSL TABS ===== */
.hsl-tabs, .curve-channel-tabs {
  display: flex; gap: 2px;
  margin-bottom: 8px;
}
.hsl-tab, .curve-tab {
  flex: 1; padding: 4px; border: none; border-radius: 4px;
  background: var(--bg-hover); color: var(--text-muted);
  font-size: 10px; cursor: pointer; transition: background 0.1s;
}
.hsl-tab.active, .curve-tab.active { background: var(--accent); color: #fff; }

.hsl-color-row { display: flex; align-items: center; gap: 4px; margin-bottom: 2px; }
.hsl-color-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.hsl-color-row label { font-size: 10px; color: var(--text-secondary); width: 30px; }
.hsl-color-row .adj-slider { flex: 1; }
.hsl-color-row .adj-value { font-size: 9px; color: var(--text-muted); width: 24px; text-align: right; }

/* ===== CURVE CANVAS ===== */
#curveCanvas {
  width: 100%;
  background: #111116;
  border-radius: 4px;
  border: 1px solid var(--border);
  cursor: crosshair;
  margin-bottom: 8px;
}

/* ===== COLOR GRADE WHEELS ===== */
.color-grade-wheels {
  display: flex;
  gap: 6px;
  margin-bottom: 10px;
  justify-content: space-between;
}
.color-wheel-group {
  display: flex; flex-direction: column; align-items: center; gap: 4px; flex: 1;
}
.cw-label { font-size: 9px; color: var(--text-muted); text-transform: uppercase; }
.color-wheel {
  border-radius: 50%;
  cursor: crosshair;
  border: 1px solid var(--border);
}

/* ===== PRESETS ===== */
.presets-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  margin-bottom: 8px;
}
.preset-btn {
  padding: 5px 6px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg-base);
  color: var(--text-secondary);
  font-size: 10px;
  cursor: pointer;
  text-align: left;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  transition: background 0.1s, border-color 0.1s;
}
.preset-btn:hover { background: var(--bg-hover); color: var(--text-primary); border-color: var(--border-light); }
.preset-btn.active { border-color: var(--accent); color: var(--accent); background: var(--accent-dim); }
.preset-btn.user-preset { display: flex; align-items: center; justify-content: space-between; }
.preset-btn .del-preset { color: var(--text-muted); font-size: 12px; line-height: 1; padding: 0 2px; }
.preset-btn .del-preset:hover { color: var(--danger); }
.preset-actions { display: flex; gap: 4px; justify-content: flex-end; }

/* ===== MODAL ===== */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.7);
  display: flex; align-items: center; justify-content: center;
  z-index: 1000; backdrop-filter: blur(4px);
}
.modal {
  background: var(--bg-panel);
  border: 1px solid var(--border-light);
  border-radius: 10px;
  width: 380px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.modal-sm { width: 280px; }
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
}
.modal-header h3 { font-size: 13px; font-weight: 600; }
.modal-close {
  background: none; border: none; color: var(--text-muted);
  font-size: 18px; cursor: pointer; line-height: 1; padding: 2px;
}
.modal-close:hover { color: var(--text-primary); }
.modal-body { padding: 16px; display: flex; flex-direction: column; gap: 12px; }
.modal-footer { padding: 12px 16px; border-top: 1px solid var(--border); display: flex; gap: 6px; justify-content: flex-end; }

.export-info { font-size: 12px; color: var(--accent); font-weight: 500; }
.export-row {
  display: flex; align-items: center; gap: 10px;
}
.export-row label { font-size: 11px; color: var(--text-secondary); width: 70px; flex-shrink: 0; }
.export-row select, .export-row input[type="range"] { flex: 1; }
.export-row select {
  background: var(--bg-base); border: 1px solid var(--border);
  color: var(--text-primary); padding: 4px 8px; border-radius: 4px;
  font-size: 11px; outline: none; cursor: pointer;
}
.export-row select:hover { border-color: var(--border-light); }

.progress-bar {
  height: 4px; background: var(--slider-track);
  border-radius: 2px; overflow: hidden;
}
.progress-fill { height: 100%; background: var(--accent); transition: width 0.2s; }
.export-progress { display: flex; flex-direction: column; gap: 6px; }
#progressText { font-size: 10px; color: var(--text-muted); }

.text-input {
  width: 100%; padding: 6px 8px;
  background: var(--bg-base); border: 1px solid var(--border);
  border-radius: 4px; color: var(--text-primary); font-size: 12px;
  outline: none;
}
.text-input:focus { border-color: var(--accent); }

/* ===== DRAG OVER ===== */
body.drag-over .preview-drop-zone {
  background: rgba(91,142,245,0.08);
}
body.drag-over .drop-zone-content {
  color: var(--accent);
}

/* ===== SCROLLBAR GLOBAL ===== */
::-webkit-scrollbar { width: 4px; height: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

/* ===== CROP PANEL ===== */
.crop-aspect-row {
  display: flex; gap: 4px;
}
.crop-ar-btn {
  flex: 1; padding: 4px 2px;
  border: 1px solid var(--border); border-radius: 4px;
  background: var(--bg-base); color: var(--text-muted);
  font-size: 9px; cursor: pointer; text-align: center;
  transition: background 0.1s, border-color 0.1s;
}
.crop-ar-btn:hover { background: var(--bg-hover); color: var(--text-primary); }
.crop-ar-btn.active { background: var(--accent-dim); border-color: var(--accent); color: var(--accent); }
.crop-actions { display: flex; justify-content: flex-end; margin-top: 6px; }

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  :root { --filmstrip-width: 110px; --panel-width: 240px; }
}
@media (max-width: 700px) {
  .main-layout { grid-template-columns: 1fr; }
  .filmstrip, .adjustments-panel { display: none; }
}

/* ===== TOAST ===== */
.lumen-toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(12px);
  background: #2a2a32;
  color: #e0e0e8;
  padding: 10px 20px;
  border-radius: 6px;
  font-size: 13px;
  border: 1px solid #3a3a48;
  box-shadow: 0 4px 16px rgba(0,0,0,0.5);
  opacity: 0;
  transition: opacity 0.2s, transform 0.2s;
  z-index: 9999;
  max-width: 480px;
  text-align: center;
}
.lumen-toast.lumen-toast-show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.lumen-toast.lumen-toast-error {
  border-color: #e05555;
  color: #ffaaaa;
}