/* ─── PixelForge — Global Design System ─────────────────────────────────── */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

/* ─── Variables ──────────────────────────────────────────────────────────── */
:root {
  /* Brand */
  --brand-primary: #6366f1;
  --brand-secondary: #a855f7;
  --brand-accent: #06b6d4;
  --brand-glow: rgba(99, 102, 241, 0.35);

  /* Surfaces */
  --bg-base: #070712;
  --bg-surface: #0d0d1f;
  --bg-panel: rgba(13, 13, 31, 0.85);
  --bg-card: rgba(255, 255, 255, 0.04);
  --bg-card-hover: rgba(255, 255, 255, 0.07);
  --bg-input: rgba(255, 255, 255, 0.06);

  /* Borders */
  --border-subtle: rgba(255, 255, 255, 0.07);
  --border-medium: rgba(255, 255, 255, 0.12);
  --border-brand: rgba(99, 102, 241, 0.5);

  /* Text */
  --text-primary: #f1f1f8;
  --text-secondary: rgba(241, 241, 248, 0.6);
  --text-muted: rgba(241, 241, 248, 0.35);

  /* Status */
  --success: #22c55e;
  --warning: #f59e0b;
  --error: #ef4444;

  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;

  /* Radii */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-pill: 999px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.2);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Typography */
  --font-sans: 'Outfit', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Layout */
  --header-height: 64px;
  --panel-width: 260px;
}

/* ─── Reset & Base ───────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-sans);
  background: var(--bg-base);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ─── Animated Background ────────────────────────────────────────────────── */
.bg-grid {
  position: fixed;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(rgba(99, 102, 241, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99, 102, 241, 0.05) 1px, transparent 1px);
  background-size: 50px 50px;
  pointer-events: none;
}

.bg-orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
  animation: orbFloat 12s ease-in-out infinite;
}
.bg-orb-1 { width: 500px; height: 500px; background: rgba(99, 102, 241, 0.12); top: -200px; left: -100px; animation-delay: 0s; }
.bg-orb-2 { width: 400px; height: 400px; background: rgba(168, 85, 247, 0.10); bottom: -150px; right: -100px; animation-delay: -4s; }
.bg-orb-3 { width: 350px; height: 350px; background: rgba(6, 182, 212, 0.08); top: 50%; left: 50%; animation-delay: -8s; }

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -30px) scale(1.05); }
  66% { transform: translate(-20px, 20px) scale(0.97); }
}

/* ─── Header ─────────────────────────────────────────────────────────────── */
.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(7, 7, 18, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  box-shadow: 0 1px 0 rgba(99, 102, 241, 0.1);
}

.header-inner {
  max-width: 1600px;
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  gap: var(--space-6);
  padding: 0 var(--space-6);
}

.logo { display: flex; align-items: center; gap: var(--space-3); text-decoration: none; }
.logo-icon { width: 36px; height: 36px; flex-shrink: 0; filter: drop-shadow(0 0 8px rgba(99, 102, 241, 0.5)); }
.logo-text { font-size: 20px; font-weight: 700; letter-spacing: -0.3px; color: var(--text-primary); }
.logo-accent { background: linear-gradient(135deg, #6366f1, #a855f7); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

.header-nav { display: flex; align-items: center; gap: var(--space-3); margin-left: var(--space-2); flex: 1; }
.nav-badge {
  font-size: 11px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(168, 85, 247, 0.2));
  border: 1px solid rgba(99, 102, 241, 0.3);
  color: #a5b4fc;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}
.nav-version { font-size: 11px; color: var(--text-muted); font-family: var(--font-mono); }

.header-actions { display: flex; align-items: center; gap: var(--space-3); margin-left: auto; }

/* ─── Buttons ────────────────────────────────────────────────────────────── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 9px 20px;
  border-radius: var(--radius-md);
  border: none;
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
  color: white;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-base);
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.3);
  position: relative;
  overflow: hidden;
}
.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.15), transparent);
  opacity: 0;
  transition: var(--transition-fast);
}
.btn-primary:hover::before { opacity: 1; }
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 0 30px rgba(99, 102, 241, 0.45); }
.btn-primary:active { transform: translateY(0); }
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; transform: none; box-shadow: none; }
.btn-primary svg { width: 16px; height: 16px; }
.btn-full { width: 100%; justify-content: center; margin-top: var(--space-4); }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 9px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-medium);
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-base);
}
.btn-ghost:hover { background: var(--bg-card); color: var(--text-primary); border-color: var(--border-brand); }
.btn-ghost svg { width: 16px; height: 16px; }

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-medium);
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-base);
  flex: 1;
  justify-content: center;
}
.btn-outline:hover { background: var(--bg-card); color: var(--text-primary); border-color: var(--brand-primary); }
.btn-outline svg { width: 14px; height: 14px; }

.btn-upload {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 12px 28px;
  border-radius: var(--radius-lg);
  border: 2px solid rgba(99, 102, 241, 0.5);
  background: linear-gradient(135deg, rgba(99,102,241,0.1), rgba(168,85,247,0.1));
  color: #a5b4fc;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-base);
  margin-top: var(--space-5);
}
.btn-upload:hover {
  background: linear-gradient(135deg, rgba(99,102,241,0.2), rgba(168,85,247,0.2));
  border-color: rgba(99, 102, 241, 0.8);
  box-shadow: 0 0 30px rgba(99, 102, 241, 0.3);
  transform: translateY(-2px);
}
.btn-upload svg { width: 18px; height: 18px; }

.btn-sm { font-size: 12px; padding: 6px 12px; }

/* ─── Upload Section ─────────────────────────────────────────────────────── */
.upload-section {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - var(--header-height));
  padding: var(--space-8);
  position: relative;
  z-index: 1;
}

.drop-zone {
  width: 100%;
  max-width: 560px;
  min-height: 380px;
  border: 2px dashed rgba(99, 102, 241, 0.35);
  border-radius: var(--radius-xl);
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}
.drop-zone::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 50%, rgba(99, 102, 241, 0.05), transparent 70%);
  opacity: 0;
  transition: var(--transition-base);
}
.drop-zone:hover::before, .drop-zone.drag-over::before { opacity: 1; }
.drop-zone:hover, .drop-zone.drag-over {
  border-color: rgba(99, 102, 241, 0.7);
  box-shadow: 0 0 40px rgba(99, 102, 241, 0.2), inset 0 0 40px rgba(99, 102, 241, 0.05);
  transform: scale(1.01);
}
.drop-zone.drag-over { border-style: solid; }

.drop-zone-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-8);
  gap: var(--space-3);
  position: relative;
  z-index: 1;
}

.drop-icon {
  width: 90px;
  height: 90px;
  animation: dropIconFloat 4s ease-in-out infinite;
}

@keyframes dropIconFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.drop-title {
  font-size: 26px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--text-primary), #a5b4fc);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-top: var(--space-2);
}
.drop-subtitle { font-size: 15px; color: var(--text-secondary); }
.drop-formats { font-size: 12px; color: var(--text-muted); font-family: var(--font-mono); }

/* ─── Editor Layout ──────────────────────────────────────────────────────── */
.editor-section {
  min-height: calc(100vh - var(--header-height));
  position: relative;
  z-index: 1;
  padding: var(--space-4);
}

.editor-layout {
  display: grid;
  grid-template-columns: var(--panel-width) 1fr var(--panel-width);
  gap: var(--space-4);
  height: calc(100vh - var(--header-height) - var(--space-8));
  max-width: 1600px;
  margin: 0 auto;
}

/* ─── Panels ─────────────────────────────────────────────────────────────── */
.panel {
  background: var(--bg-panel);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding: var(--space-4);
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-width: thin;
  scrollbar-color: rgba(99, 102, 241, 0.3) transparent;
}
.panel::-webkit-scrollbar { width: 4px; }
.panel::-webkit-scrollbar-track { background: transparent; }
.panel::-webkit-scrollbar-thumb { background: rgba(99, 102, 241, 0.3); border-radius: 999px; }

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--border-subtle);
  flex-shrink: 0;
}

.panel-title {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--text-secondary);
}
.panel-title svg { width: 16px; height: 16px; opacity: 0.7; }

.filter-count {
  font-size: 10px;
  font-family: var(--font-mono);
  color: var(--brand-primary);
  background: rgba(99, 102, 241, 0.12);
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(99, 102, 241, 0.2);
}

/* ─── Filter Grid ────────────────────────────────────────────────────────── */
.filter-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2);
  flex-shrink: 0;
}

.filter-card {
  position: relative;
  padding: 10px var(--space-2);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  cursor: pointer;
  transition: var(--transition-base);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  user-select: none;
  overflow: hidden;
}
.filter-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(99,102,241,0.1), rgba(168,85,247,0.1));
  opacity: 0;
  transition: var(--transition-fast);
}
.filter-card:hover { border-color: var(--border-brand); transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.filter-card:hover::before { opacity: 1; }
.filter-card.active {
  border-color: var(--brand-primary);
  background: linear-gradient(135deg, rgba(99,102,241,0.15), rgba(168,85,247,0.15));
  box-shadow: 0 0 16px rgba(99, 102, 241, 0.25);
}
.filter-card.active::before { opacity: 1; }

.filter-icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-input);
  border-radius: var(--radius-sm);
  font-size: 16px;
  position: relative;
  z-index: 1;
  transition: var(--transition-base);
}
.filter-card.active .filter-icon { background: rgba(99,102,241,0.2); }
.filter-card:hover .filter-icon { transform: scale(1.1); }

.filter-name {
  font-size: 10px;
  font-weight: 600;
  text-align: center;
  color: var(--text-secondary);
  letter-spacing: 0.3px;
  position: relative;
  z-index: 1;
  transition: var(--transition-fast);
  line-height: 1.2;
}
.filter-card.active .filter-name { color: #a5b4fc; }
.filter-card:hover .filter-name { color: var(--text-primary); }

.filter-check {
  position: absolute;
  top: 5px;
  right: 5px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--brand-primary);
  border: 2px solid var(--bg-base);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 2;
}
.filter-card.active .filter-check { display: flex; }

/* ─── Panel Sections ─────────────────────────────────────────────────────── */
.panel-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid var(--border-subtle);
}

.section-title {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: var(--text-muted);
}
.section-title svg { width: 14px; height: 14px; }

/* ─── Sliders ────────────────────────────────────────────────────────────── */
.sliders-list { display: flex; flex-direction: column; gap: var(--space-4); }

.slider-group { display: flex; flex-direction: column; gap: var(--space-2); }

.slider-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.slider-label { font-size: 12px; color: var(--text-secondary); font-weight: 500; }
.slider-val {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--brand-primary);
  background: rgba(99,102,241,0.1);
  padding: 1px 7px;
  border-radius: var(--radius-pill);
  min-width: 30px;
  text-align: center;
}

.range-input {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  border-radius: var(--radius-pill);
  background: var(--bg-input);
  outline: none;
  cursor: pointer;
  transition: var(--transition-fast);
  position: relative;
}
.range-input::-webkit-slider-runnable-track {
  height: 4px;
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, var(--brand-primary) var(--fill, 50%), var(--bg-input) var(--fill, 50%));
}
.range-input::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: white;
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.4), 0 2px 6px rgba(0,0,0,0.5);
  margin-top: -6px;
  cursor: pointer;
  transition: var(--transition-fast);
}
.range-input::-webkit-slider-thumb:hover {
  box-shadow: 0 0 0 5px rgba(99, 102, 241, 0.5), 0 2px 8px rgba(0,0,0,0.5);
  transform: scale(1.15);
}
.range-input::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: white;
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.4);
  border: none;
  cursor: pointer;
}
.range-input.range-sm::-webkit-slider-thumb { width: 12px; height: 12px; margin-top: -4px; }

/* ─── Toggle ─────────────────────────────────────────────────────────────── */
.multi-filter-row { display: flex; align-items: center; justify-content: space-between; }
.toggle-label { display: flex; align-items: center; gap: var(--space-2); font-size: 13px; color: var(--text-secondary); font-weight: 500; cursor: pointer; }
.toggle-label svg { width: 15px; height: 15px; }
.toggle-hint { font-size: 10px; color: var(--text-muted); }

.toggle-switch { position: relative; }
.toggle-switch input[type="checkbox"] { position: absolute; opacity: 0; width: 0; height: 0; }
.toggle-track {
  display: block;
  width: 40px;
  height: 22px;
  border-radius: var(--radius-pill);
  background: var(--bg-input);
  border: 1px solid var(--border-medium);
  cursor: pointer;
  transition: var(--transition-base);
  position: relative;
}
.toggle-track::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: white;
  top: 2px;
  left: 2px;
  transition: var(--transition-base);
  box-shadow: 0 1px 4px rgba(0,0,0,0.4);
}
.toggle-switch input:checked + .toggle-track {
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
  border-color: transparent;
  box-shadow: 0 0 12px rgba(99, 102, 241, 0.4);
}
.toggle-switch input:checked + .toggle-track::after { left: 20px; }

/* ─── Panel Actions ──────────────────────────────────────────────────────── */
.panel-actions { display: flex; gap: var(--space-2); flex-shrink: 0; }

/* ─── Editor Center ──────────────────────────────────────────────────────── */
.editor-center {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  min-width: 0;
}

/* ─── View Controls ──────────────────────────────────────────────────────── */
.view-controls {
  display: flex;
  gap: var(--space-2);
  background: var(--bg-panel);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 4px;
  align-self: flex-start;
}

.view-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-fast);
}
.view-btn svg { width: 15px; height: 15px; }
.view-btn:hover { color: var(--text-primary); }
.view-btn.active {
  background: linear-gradient(135deg, rgba(99,102,241,0.2), rgba(168,85,247,0.2));
  color: #a5b4fc;
  box-shadow: 0 0 12px rgba(99, 102, 241, 0.2);
}

/* ─── Canvas Wrapper ─────────────────────────────────────────────────────── */
.canvas-wrapper {
  flex: 1;
  display: flex;
  background: var(--bg-panel);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  overflow: hidden;
  position: relative;
  min-height: 0;
}

.canvas-area {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  width: 100%;
  height: 100%;
  padding: var(--space-4);
}
.canvas-area.hidden { display: none; }

canvas {
  max-width: 100%;
  max-height: 100%;
  border-radius: var(--radius-md);
  display: block;
  object-fit: contain;
}

/* ─── Canvas Overlay (processing) ───────────────────────────────────────── */
.canvas-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-start;
  justify-content: flex-end;
  padding: var(--space-4);
  pointer-events: none;
  z-index: 10;
}

.processing-badge {
  display: none;
  align-items: center;
  gap: var(--space-2);
  font-size: 12px;
  font-weight: 600;
  color: white;
  background: rgba(99, 102, 241, 0.9);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  backdrop-filter: blur(10px);
}
.processing-badge.visible { display: flex; }

.spinner {
  width: 12px;
  height: 12px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ─── Compare View ───────────────────────────────────────────────────────── */
.compare-view {
  display: flex !important;
  gap: 0;
  padding: 0;
}
.compare-view.hidden { display: none !important; }

.compare-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-4);
  position: relative;
}

.compare-label {
  position: absolute;
  top: var(--space-4);
  left: 50%;
  transform: translateX(-50%);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: white;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(10px);
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  z-index: 1;
}

.compare-divider {
  width: 2px;
  background: linear-gradient(180deg, transparent, var(--brand-primary), transparent);
  align-self: stretch;
  opacity: 0.6;
}

/* ─── Split Slider View ──────────────────────────────────────────────────── */
.split-view {
  position: relative;
  cursor: col-resize;
  padding: 0;
  overflow: hidden;
}

#canvas-split-base {
  width: 100%;
  height: 100%;
  object-fit: contain;
  position: absolute;
  inset: 0;
  max-width: none;
  max-height: none;
}

.split-overlay-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  max-width: none;
  max-height: none;
  clip-path: inset(0 50% 0 0);
  transition: clip-path 0.05s ease;
}

.split-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: col-resize;
  z-index: 20;
}
.split-handle-line {
  position: absolute;
  width: 2px;
  top: 0;
  bottom: 0;
  background: linear-gradient(180deg, transparent, white, transparent);
  border-radius: var(--radius-pill);
}
.split-handle-knob {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: white;
  box-shadow: 0 0 0 3px rgba(99,102,241,0.5), 0 4px 12px rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}
.split-handle:hover .split-handle-knob {
  transform: scale(1.1);
  box-shadow: 0 0 0 5px rgba(99,102,241,0.7), 0 4px 16px rgba(0,0,0,0.5);
}
.split-handle-knob svg { width: 18px; height: 18px; }

.split-label-left, .split-label-right {
  position: absolute;
  top: var(--space-4);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: white;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(10px);
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  z-index: 15;
  pointer-events: none;
}
.split-label-left { left: var(--space-4); }
.split-label-right { right: var(--space-4); }

/* ─── Info Bar ───────────────────────────────────────────────────────────── */
.info-bar {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  background: var(--bg-panel);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 10px var(--space-4);
  flex-shrink: 0;
}

.info-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--text-secondary);
}
.info-item svg { width: 14px; height: 14px; opacity: 0.6; }

.info-action {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-left: auto;
  padding: 5px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-medium);
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-fast);
}
.info-action:hover { background: var(--bg-card); color: var(--text-primary); }
.info-action svg { width: 13px; height: 13px; }

/* ─── Presets ────────────────────────────────────────────────────────────── */
.preset-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2);
  flex-shrink: 0;
}

.preset-card {
  padding: 10px var(--space-3);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  cursor: pointer;
  transition: var(--transition-base);
  display: flex;
  flex-direction: column;
  gap: 4px;
  position: relative;
  overflow: hidden;
}
.preset-card::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--preset-color, linear-gradient(90deg, var(--brand-primary), var(--brand-secondary)));
  transform: scaleX(0);
  transition: var(--transition-base);
  transform-origin: left;
}
.preset-card:hover { border-color: var(--border-brand); transform: translateY(-2px); }
.preset-card:hover::before { transform: scaleX(1); }
.preset-card.active {
  background: linear-gradient(135deg, rgba(99,102,241,0.15), rgba(168,85,247,0.15));
  border-color: var(--brand-primary);
}
.preset-card.active::before { transform: scaleX(1); }

.preset-emoji { font-size: 18px; line-height: 1; }
.preset-name { font-size: 12px; font-weight: 600; color: var(--text-primary); }
.preset-desc { font-size: 10px; color: var(--text-muted); }

/* ─── Intensity & Export ─────────────────────────────────────────────────── */
.intensity-control { display: flex; flex-direction: column; gap: var(--space-2); }
.range-labels {
  display: flex;
  justify-content: space-between;
  font-size: 10px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}
.range-val { font-size: 11px; font-family: var(--font-mono); color: var(--brand-primary); }

.histogram-canvas {
  width: 100%;
  height: 80px;
  border-radius: var(--radius-sm);
  background: rgba(0,0,0,0.3);
}

.export-options { display: flex; flex-direction: column; gap: var(--space-3); }
.export-row { display: flex; align-items: center; justify-content: space-between; gap: var(--space-2); }
.export-label { font-size: 12px; color: var(--text-secondary); font-weight: 500; flex-shrink: 0; }
.export-select {
  flex: 1;
  background: var(--bg-input);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 12px;
  padding: 5px 8px;
  outline: none;
  cursor: pointer;
  transition: var(--transition-fast);
}
.export-select:focus { border-color: var(--brand-primary); }
#export-quality { flex: 1; margin: 0; }

/* ─── Toasts ─────────────────────────────────────────────────────────────── */
.toast-container {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 12px 18px;
  border-radius: var(--radius-md);
  background: rgba(20, 20, 40, 0.95);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-medium);
  box-shadow: var(--shadow-md);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
  pointer-events: all;
  animation: toastIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
  max-width: 320px;
}
.toast.out { animation: toastOut 0.25s ease forwards; }
.toast-icon { font-size: 16px; flex-shrink: 0; }
.toast-success { border-color: rgba(34, 197, 94, 0.3); }
.toast-success .toast-icon::before { content: '✅'; }
.toast-error { border-color: rgba(239, 68, 68, 0.3); }
.toast-error .toast-icon::before { content: '❌'; }
.toast-info { border-color: rgba(99, 102, 241, 0.3); }
.toast-info .toast-icon::before { content: 'ℹ️'; }

@keyframes toastIn {
  from { opacity: 0; transform: translateX(20px) scale(0.95); }
  to { opacity: 1; transform: translateX(0) scale(1); }
}
@keyframes toastOut {
  from { opacity: 1; transform: translateX(0) scale(1); }
  to { opacity: 0; transform: translateX(20px) scale(0.95); }
}

/* ─── Utilities ──────────────────────────────────────────────────────────── */
.hidden { display: none !important; }

/* Focus visible */
:focus-visible {
  outline: 2px solid var(--brand-primary);
  outline-offset: 2px;
}

/* ─── Responsive ─────────────────────────────────────────────────────────── */
@media (max-width: 1100px) {
  :root { --panel-width: 220px; }
}

@media (max-width: 900px) {
  .editor-layout {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr auto;
    height: auto;
    min-height: calc(100vh - var(--header-height));
  }
  .panel-left, .panel-right { max-height: 300px; }
  .editor-section { padding: var(--space-3); }
  .canvas-wrapper { min-height: 350px; }
}

@media (max-width: 600px) {
  .header-inner { padding: 0 var(--space-4); gap: var(--space-3); }
  .logo-text { display: none; }
  .header-nav { display: none; }
  .drop-title { font-size: 20px; }
  .info-bar { flex-wrap: wrap; gap: var(--space-2); }
  .view-controls { align-self: stretch; }
  .view-btn span { display: none; }
}

/* ─── Scrollbar Global ───────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(99, 102, 241, 0.3); border-radius: 999px; }
::-webkit-scrollbar-thumb:hover { background: rgba(99, 102, 241, 0.5); }