/* ==========================================================================
   ApexAI Studio - Ultimate High-Contrast, Ergonomic & Responsive Design System
   Optimized for 100% Readability, Comfort & Seamless Performance on All Devices
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=Inter:wght@300;400;500;600;700;800&family=Outfit:wght@500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  /* Dark Theme (Default - Deep Obsidian & Rich Zinc Contrast) */
  --bg-primary: #09090b;
  --bg-secondary: #0f1219;
  --bg-tertiary: #161a26;
  --bg-surface: #1e2436;
  --bg-card: #131724;
  --bg-glass: rgba(15, 18, 25, 0.85);
  --bg-input: #0c0e17;

  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-color: rgba(255, 255, 255, 0.12);
  --border-hover: rgba(255, 255, 255, 0.25);
  --border-focus: #6366f1;

  --text-primary: #fafafa;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --text-inverse: #09090b;

  /* Brand Accents */
  --accent-primary: #6366f1;
  --accent-primary-hover: #4f46e5;
  --accent-glow: rgba(99, 102, 241, 0.25);
  
  --accent-secondary: #ec4899;
  --accent-emerald: #10b981;
  --accent-cyan: #06b6d4;
  --accent-amber: #f59e0b;

  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
  --accent-gradient-teal: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
  --accent-gradient-amber: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
  --accent-gradient-emerald: linear-gradient(135deg, #10b981 0%, #059669 100%);

  /* System Semantics */
  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.14);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.14);
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.14);
  --info: #38bdf8;
  --info-bg: rgba(56, 189, 248, 0.14);

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 16px 36px rgba(0, 0, 0, 0.6);
  --shadow-xl: 0 24px 48px -12px rgba(0, 0, 0, 0.7);
  --shadow-glow: 0 0 30px var(--accent-glow);

  /* Typography */
  --font-sans: 'Plus Jakarta Sans', 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Outfit', var(--font-sans);
  --font-mono: 'JetBrains Mono', monospace;

  /* Radius */
  --radius-xs: 6px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --transition-fast: 0.15s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Light Theme (Pristine High-Contrast Aesthetic) */
[data-theme="light"] {
  --bg-primary: #f4f6f8;
  --bg-secondary: #ffffff;
  --bg-tertiary: #eaedf2;
  --bg-surface: #dfe4ec;
  --bg-card: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.9);
  --bg-input: #f4f6f8;

  --border-subtle: rgba(0, 0, 0, 0.05);
  --border-color: rgba(0, 0, 0, 0.12);
  --border-hover: rgba(0, 0, 0, 0.25);
  --border-focus: #4f46e5;

  --text-primary: #09090b;
  --text-secondary: #3f3f46;
  --text-muted: #71717a;
  --text-inverse: #ffffff;

  --accent-glow: rgba(99, 102, 241, 0.15);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 16px 36px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 24px 48px -12px rgba(0, 0, 0, 0.12);
}

/* Base Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  letter-spacing: -0.01em;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-secondary);
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

/* Ambient Glowing Background Orbs */
.ambient-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.ambient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(140px);
  opacity: 0.18;
  animation: floatOrb 22s ease-in-out infinite alternate;
}

[data-theme="light"] .ambient-orb {
  opacity: 0.08;
}

.orb-1 {
  width: 600px;
  height: 600px;
  top: -150px;
  left: 15%;
  background: radial-gradient(circle, #6366f1, #8b5cf6);
}

.orb-2 {
  width: 500px;
  height: 500px;
  bottom: 0;
  right: 10%;
  background: radial-gradient(circle, #ec4899, #db2777);
  animation-delay: -6s;
}

.orb-3 {
  width: 450px;
  height: 450px;
  top: 35%;
  left: 65%;
  background: radial-gradient(circle, #06b6d4, #3b82f6);
  animation-delay: -12s;
}

@keyframes floatOrb {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(50px, 35px) scale(1.08); }
  100% { transform: translate(-30px, 60px) scale(0.95); }
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition-normal);
}

.header-container {
  max-width: 1480px;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.35rem;
  color: var(--text-primary);
  text-decoration: none;
  cursor: pointer;
  flex-shrink: 0;
}

.brand-icon-wrapper {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-size: 1.15rem;
  box-shadow: 0 0 20px var(--accent-glow);
}

.brand-badge {
  font-size: 0.65rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.2rem 0.55rem;
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid rgba(99, 102, 241, 0.3);
  color: var(--accent-primary);
  border-radius: var(--radius-full);
}

[data-theme="light"] .brand-badge {
  background: rgba(99, 102, 241, 0.1);
  color: #4338ca;
}

nav[aria-label="Main Tool Navigation"] {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  max-width: 100%;
  scrollbar-width: none;
}

nav[aria-label="Main Tool Navigation"]::-webkit-scrollbar {
  display: none;
}

.nav-tools-list {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  background: rgba(0, 0, 0, 0.25);
  padding: 0.3rem 0.35rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  list-style: none;
  white-space: nowrap;
}

[data-theme="light"] .nav-tools-list {
  background: var(--bg-tertiary);
}

.nav-tool-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.85rem;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.nav-tool-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.08);
}

[data-theme="light"] .nav-tool-btn:hover {
  background: rgba(0, 0, 0, 0.05);
}

.nav-tool-btn.active {
  color: #ffffff;
  background: var(--accent-gradient);
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
}

.nav-badge-pill {
  font-size: 0.65rem;
  padding: 0.1rem 0.45rem;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.25);
  color: #ffffff;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-shrink: 0;
}

.theme-toggle-btn, .action-icon-btn {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover, .action-icon-btn:hover {
  background: var(--bg-surface);
  border-color: var(--border-hover);
  transform: translateY(-1px);
}

/* ==========================================================================
   Hero Top Banner
   ========================================================================== */
.hero-banner {
  text-align: center;
  padding: 3rem 1.5rem 2rem;
  position: relative;
  z-index: 1;
}

.hero-pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1.1rem;
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: var(--radius-full);
  color: #a5b4fc;
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  box-shadow: 0 0 16px rgba(99, 102, 241, 0.15);
}

[data-theme="light"] .hero-pill-badge {
  background: rgba(99, 102, 241, 0.1);
  color: #4338ca;
  border-color: rgba(99, 102, 241, 0.25);
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, #ffffff 40%, #a5b4fc 75%, #ec4899 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

[data-theme="light"] .hero-title {
  background: linear-gradient(135deg, #09090b 35%, #4338ca 75%, #db2777 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 820px;
  margin: 0 auto 1.75rem;
  line-height: 1.6;
}

.hero-feature-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.6rem;
  margin-bottom: 1rem;
}

.feature-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 0.3rem 0.85rem;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.feature-tag:hover {
  border-color: var(--border-hover);
  transform: translateY(-1px);
}

.feature-tag i {
  color: var(--success);
}

/* ==========================================================================
   Main Workspaces Container
   ========================================================================== */
.main-content {
  flex: 1;
  max-width: 1480px;
  width: 100%;
  margin: 0 auto;
  padding: 0 1.5rem 4.5rem;
  position: relative;
  z-index: 1;
}

.tool-workspace {
  display: none;
  animation: workspaceFadeIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.tool-workspace.active {
  display: block;
}

@keyframes workspaceFadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.workspace-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
}

/* ==========================================================================
   1. AI Background Remover Workspace
   ========================================================================== */
.studio-layout {
  display: grid;
  grid-template-columns: 1fr 380px;
  min-height: 680px;
}

@media (max-width: 1080px) {
  .studio-layout {
    grid-template-columns: 1fr;
  }
}

.studio-viewport {
  background: var(--bg-secondary);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  border-right: 1px solid var(--border-color);
}

@media (max-width: 1080px) {
  .studio-viewport {
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }
}

.viewport-toolbar {
  padding: 0.85rem 1.35rem;
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.viewport-tools-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.tool-btn-sm {
  padding: 0.45rem 0.85rem;
  font-size: 0.82rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tool-btn-sm:hover {
  background: var(--bg-card);
  border-color: var(--border-hover);
  transform: translateY(-1px);
}

.tool-btn-sm.active {
  background: var(--accent-primary);
  color: #ffffff;
  border-color: var(--accent-primary);
  box-shadow: 0 2px 10px rgba(99, 102, 241, 0.4);
}

/* Dropzone */
.dropzone-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3.5rem 2rem;
  border: 2px dashed var(--border-color);
  margin: 1.5rem;
  border-radius: var(--radius-lg);
  background: rgba(0, 0, 0, 0.1);
  transition: all var(--transition-normal);
  cursor: pointer;
  text-align: center;
}

[data-theme="light"] .dropzone-container {
  background: rgba(0, 0, 0, 0.02);
}

.dropzone-container:hover, .dropzone-container.drag-over {
  border-color: var(--accent-primary);
  background: rgba(99, 102, 241, 0.06);
  transform: scale(1.005);
}

.dropzone-icon-glow {
  width: 76px;
  height: 76px;
  border-radius: var(--radius-xl);
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: #ffffff;
  margin-bottom: 1.35rem;
  box-shadow: var(--shadow-glow);
}

.dropzone-title {
  font-size: 1.45rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.dropzone-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 1.35rem;
  max-width: 480px;
}

.sample-images-bar {
  margin-top: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.sample-chip {
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  cursor: pointer;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: all var(--transition-fast);
}

.sample-chip:hover {
  color: var(--text-primary);
  border-color: var(--accent-primary);
  background: var(--bg-surface);
  transform: translateY(-1px);
}

/* Canvas Viewport */
.canvas-stage {
  flex: 1;
  position: relative;
  display: none;
  align-items: center;
  justify-content: center;
  min-height: 520px;
  overflow: hidden;
  background-color: #11141f;
  background-image: 
    linear-gradient(45deg, rgba(255,255,255,0.03) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(255,255,255,0.03) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(255,255,255,0.03) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(255,255,255,0.03) 75%);
  background-size: 20px 20px;
}

[data-theme="light"] .canvas-stage {
  background-color: #f1f5f9;
  background-image: 
    linear-gradient(45deg, rgba(0,0,0,0.04) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(0,0,0,0.04) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(0,0,0,0.04) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(0,0,0,0.04) 75%);
}

.canvas-stage.has-image {
  display: flex;
}

.canvas-viewport-wrapper {
  position: relative;
  max-width: 92%;
  max-height: 88%;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Comparison Split Slider */
.comparison-container {
  position: relative;
  max-width: 100%;
  max-height: 540px;
  overflow: hidden;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  user-select: none;
  cursor: ew-resize;
  border: 1px solid var(--border-color);
}

.comparison-before, .comparison-after {
  display: block;
  max-width: 100%;
  max-height: 540px;
  object-fit: contain;
}

.comparison-overlay {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  overflow: hidden;
  width: 50%;
  border-right: 2px solid #ffffff;
  box-shadow: 3px 0 12px rgba(0,0,0,0.5);
}

.comparison-handle {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: #ffffff;
  color: #09090b;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 20px rgba(0,0,0,0.5);
  pointer-events: none;
  font-size: 0.9rem;
  z-index: 10;
}

.comparison-badge {
  position: absolute;
  bottom: 14px;
  padding: 0.35rem 0.85rem;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  border-radius: var(--radius-full);
  background: rgba(0,0,0,0.7);
  color: #fff;
  backdrop-filter: blur(8px);
  pointer-events: none;
}

.badge-original { left: 14px; }
.badge-processed { right: 14px; }

/* Controls Sidebar */
.studio-controls {
  padding: 1.5rem;
  background: var(--bg-tertiary);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  overflow-y: auto;
  max-height: 740px;
}

.control-section {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.section-label {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Background Type Switcher */
.bg-type-tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.35rem;
  background: var(--bg-input);
  padding: 0.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.bg-tab-btn {
  padding: 0.45rem 0.25rem;
  font-size: 0.78rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  text-align: center;
  transition: all var(--transition-fast);
}

.bg-tab-btn.active {
  background: var(--accent-primary);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.35);
}

/* Color Swatches Grid */
.color-swatches-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.45rem;
}

.color-swatch {
  width: 100%;
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}

.color-swatch:hover {
  transform: scale(1.15);
  z-index: 2;
}

.color-swatch.active {
  border-color: #ffffff;
  box-shadow: 0 0 0 2px var(--accent-primary);
}

[data-theme="light"] .color-swatch.active {
  border-color: #09090b;
  box-shadow: 0 0 0 2px var(--accent-primary);
}

.color-swatch.transparent-pattern {
  background-image: linear-gradient(45deg, #ccc 25%, transparent 25%), linear-gradient(-45deg, #ccc 25%, transparent 25%), linear-gradient(45deg, transparent 75%, #ccc 75%), linear-gradient(-45deg, transparent 75%, #ccc 75%);
  background-size: 10px 10px;
  background-position: 0 0, 0 5px, 5px -5px, -5px 0px;
  background-color: #fff;
}

/* Gradient Swatches */
.gradient-swatches-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
}

.gradient-swatch {
  height: 40px;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.gradient-swatch:hover {
  transform: translateY(-2px);
}

.gradient-swatch.active {
  border-color: #ffffff;
  box-shadow: 0 0 0 2px var(--accent-primary);
}

/* Studio Sceneries */
.backdrop-presets-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
}

.backdrop-card {
  height: 56px;
  border-radius: var(--radius-md);
  border: 2px solid var(--border-color);
  background-size: cover;
  background-position: center;
  cursor: pointer;
  display: flex;
  align-items: flex-end;
  padding: 0.35rem;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.backdrop-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
}

.backdrop-card span {
  position: relative;
  font-size: 0.68rem;
  font-weight: 700;
  color: #ffffff;
}

.backdrop-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

.backdrop-card.active {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 2px var(--accent-primary);
}

/* Shadow Generator Options */
.shadow-options-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.5rem;
}

.option-toggle-card {
  padding: 0.65rem 0.85rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.option-toggle-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-1px);
}

.option-toggle-card.active {
  background: rgba(99, 102, 241, 0.15);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

[data-theme="dark"] .option-toggle-card.active {
  color: #ffffff;
}

/* Sliders */
.slider-group {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.slider-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.modern-range {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--bg-surface);
  outline: none;
}

.modern-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent-primary);
  cursor: pointer;
  box-shadow: 0 0 10px rgba(99, 102, 241, 0.6);
  transition: transform var(--transition-fast);
}

.modern-range::-webkit-slider-thumb:hover {
  transform: scale(1.25);
}

/* Action Buttons */
.export-panel {
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.btn-primary-glow {
  padding: 0.85rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 700;
  color: #ffffff;
  background: var(--accent-gradient);
  border: none;
  border-radius: var(--radius-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  cursor: pointer;
  box-shadow: 0 4px 18px rgba(99, 102, 241, 0.4);
  transition: all var(--transition-normal);
}

.btn-primary-glow:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 26px rgba(99, 102, 241, 0.6);
}

.btn-secondary {
  padding: 0.65rem 1.25rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-secondary:hover {
  background: var(--bg-card);
  border-color: var(--border-hover);
  transform: translateY(-1px);
}

/* ==========================================================================
   2. Bulk Batch Remover Workspace
   ========================================================================== */
.bulk-workspace-container {
  padding: 2.25rem;
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

@media (max-width: 768px) {
  .bulk-workspace-container {
    padding: 1.25rem;
  }
}

.bulk-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.bulk-stats-badge {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.stat-pill {
  padding: 0.4rem 0.95rem;
  font-size: 0.84rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.stat-pill strong {
  color: var(--text-primary);
}

.bulk-global-settings {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.1rem 1.35rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  flex-wrap: wrap;
}

.bulk-grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.25rem;
  min-height: 250px;
}

@media (max-width: 500px) {
  .bulk-grid-cards {
    grid-template-columns: 1fr;
  }
}

.bulk-item-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-fast);
}

.bulk-item-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.bulk-item-preview {
  height: 155px;
  background-color: #141824;
  background-image: 
    linear-gradient(45deg, rgba(255,255,255,0.03) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(255,255,255,0.03) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(255,255,255,0.03) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(255,255,255,0.03) 75%);
  background-size: 16px 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.bulk-item-preview img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.bulk-item-details {
  padding: 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.bulk-item-name {
  font-size: 0.82rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text-primary);
}

.bulk-item-status {
  font-size: 0.74rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-muted);
}

.bulk-item-status.done { color: var(--success); }
.bulk-item-status.processing { color: var(--warning); }

.bulk-item-actions {
  display: flex;
  gap: 0.4rem;
  margin-top: 0.45rem;
}

.progress-bar-container {
  width: 100%;
  height: 8px;
  background: var(--bg-surface);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  width: 0%;
  background: var(--accent-gradient);
  border-radius: var(--radius-full);
  transition: width 0.3s ease;
}

/* ==========================================================================
   3. AI 4K/8K Upscaler Workspace
   ========================================================================== */
.upscaler-layout {
  display: grid;
  grid-template-columns: 1fr 360px;
  min-height: 640px;
}

@media (max-width: 1080px) {
  .upscaler-layout {
    grid-template-columns: 1fr;
  }
}

.scale-selector-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem;
}

.scale-option-card {
  padding: 0.95rem 0.5rem;
  text-align: center;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.scale-option-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

.scale-option-card.active {
  background: rgba(99, 102, 241, 0.18);
  border-color: var(--accent-primary);
}

.scale-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
}

.scale-option-card.active .scale-title {
  color: var(--accent-primary);
}

[data-theme="dark"] .scale-option-card.active .scale-title {
  color: #ffffff;
}

.scale-subtitle {
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* ==========================================================================
   4. Passport & Social Preset Studio
   ========================================================================== */
.passport-layout {
  display: grid;
  grid-template-columns: 1fr 380px;
  min-height: 660px;
}

@media (max-width: 1080px) {
  .passport-layout {
    grid-template-columns: 1fr;
  }
}

.preset-category-tabs {
  display: flex;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
  margin-bottom: 0.75rem;
  overflow-x: auto;
}

.preset-tab-btn {
  background: none;
  border: none;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.preset-tab-btn:hover {
  color: var(--text-primary);
  background: var(--bg-surface);
}

.preset-tab-btn.active {
  background: var(--bg-surface);
  color: var(--text-primary);
}

.passport-presets-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.6rem;
  max-height: 230px;
  overflow-y: auto;
}

.passport-preset-card {
  padding: 0.7rem 0.85rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  transition: all var(--transition-fast);
}

.passport-preset-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-1px);
}

.passport-preset-card.active {
  background: rgba(99, 102, 241, 0.15);
  border-color: var(--accent-primary);
}

.preset-name {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-primary);
}

.preset-dims {
  font-size: 0.74rem;
  color: var(--text-muted);
}

/* ==========================================================================
   5. "Word Supreme" - Microsoft Word Replica Suite
   ========================================================================== */
.word-suite-container {
  background: var(--bg-secondary);
  display: flex;
  flex-direction: column;
  min-height: 820px;
}

.word-ribbon-bar {
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
}

.ribbon-tabs-header {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.35rem 1.25rem 0;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  overflow-x: auto;
}

.ribbon-brand-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 800;
  font-size: 0.95rem;
  margin-right: 1.5rem;
  color: #38bdf8;
  white-space: nowrap;
}

.ribbon-tab {
  padding: 0.5rem 1.1rem;
  font-size: 0.84rem;
  font-weight: 600;
  background: transparent;
  border: none;
  border-top-left-radius: var(--radius-sm);
  border-top-right-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.ribbon-tab:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,0.08);
}

[data-theme="light"] .ribbon-tab:hover {
  background: rgba(0,0,0,0.05);
}

.ribbon-tab.active {
  color: var(--text-primary);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-bottom: 1px solid var(--bg-tertiary);
  margin-bottom: -1px;
}

.ribbon-panels-body {
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  overflow-x: auto;
}

.ribbon-panel {
  display: none;
  align-items: center;
  gap: 1rem;
}

.ribbon-panel.active {
  display: flex;
}

.ribbon-group {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding-right: 1rem;
  border-right: 1px solid var(--border-color);
  position: relative;
  white-space: nowrap;
}

.ribbon-group:last-child {
  border-right: none;
}

.ribbon-btn {
  min-width: 34px;
  height: 34px;
  padding: 0 0.6rem;
  border-radius: var(--radius-sm);
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  font-size: 0.86rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.ribbon-btn:hover {
  background: var(--bg-surface);
  border-color: var(--border-color);
}

.ribbon-btn.active {
  background: var(--accent-primary);
  color: #ffffff;
}

.ribbon-select {
  height: 34px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  padding: 0 0.75rem;
  font-size: 0.84rem;
  outline: none;
  cursor: pointer;
}

.ribbon-color-picker {
  width: 30px;
  height: 30px;
  border: none;
  background: transparent;
  cursor: pointer;
}

/* Document Stage */
.word-stage-viewport {
  flex: 1;
  background: #0d111c;
  padding: 3rem 1.5rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

[data-theme="light"] .word-stage-viewport {
  background: #e2e8f0;
}

.word-page-container {
  width: 816px;
  min-height: 1056px;
  background: #ffffff;
  color: #1e293b;
  padding: 72px;
  border-radius: 4px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.4);
  font-family: 'Inter', sans-serif;
  font-size: 11pt;
  line-height: 1.65;
  outline: none;
  position: relative;
}

@media (max-width: 860px) {
  .word-page-container {
    width: 100%;
    padding: 36px 20px;
  }
}

.word-status-bar {
  padding: 0.45rem 1.5rem;
  background: var(--bg-tertiary);
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ==========================================================================
   6. SEO Hub & Competitor Breakdown Sections
   ========================================================================= */
.seo-hub-section {
  margin-top: 4.5rem;
  padding-top: 3.5rem;
  border-top: 1px solid var(--border-color);
}

.section-heading-center {
  text-align: center;
  max-width: 820px;
  margin: 0 auto 3rem;
}

.section-title {
  font-size: 2.3rem;
  font-weight: 800;
  margin-bottom: 0.85rem;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
}

.comparison-table-wrapper {
  overflow-x: auto;
  margin-bottom: 3.5rem;
}

.seo-comparison-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-card);
}

.seo-comparison-table th, .seo-comparison-table td {
  padding: 1.1rem 1.35rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-primary);
}

.seo-comparison-table th {
  background: var(--bg-tertiary);
  font-weight: 700;
  font-size: 0.92rem;
}

.seo-comparison-table tr:last-child td {
  border-bottom: none;
}

.col-highlight {
  background: rgba(99, 102, 241, 0.08);
  font-weight: 700;
  color: var(--accent-primary);
}

.features-grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 1.75rem;
  margin-bottom: 3.5rem;
}

@media (max-width: 480px) {
  .features-grid-3 {
    grid-template-columns: 1fr;
  }
}

.feature-hub-card {
  padding: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.feature-hub-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-lg);
}

.feature-card-icon {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-md);
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  color: #ffffff;
  margin-bottom: 0.5rem;
}

/* FAQ Accordion */
.faq-accordion-container {
  max-width: 920px;
  margin: 0 auto 3.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  padding: 1.25rem 1.6rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 700;
  font-size: 1.02rem;
  cursor: pointer;
  user-select: none;
  color: var(--text-primary);
}

.faq-question i {
  transition: transform var(--transition-normal);
  color: var(--text-muted);
}

.faq-item.open .faq-question i {
  transform: rotate(180deg);
  color: var(--accent-primary);
}

.faq-answer {
  display: none;
  padding: 0 1.6rem 1.35rem;
  color: var(--text-secondary);
  font-size: 0.96rem;
  line-height: 1.65;
}

.faq-item.open .faq-answer {
  display: block;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 3.5rem 1.5rem 2rem;
  position: relative;
  z-index: 1;
}

.footer-container {
  max-width: 1480px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

@media (max-width: 960px) {
  .footer-container {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-links-col {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.footer-links-col h4 {
  font-size: 0.98rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.footer-links-col a {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-links-col a:hover {
  color: var(--accent-primary);
}

.footer-bottom-bar {
  max-width: 1480px;
  margin: 0 auto;
  padding-top: 1.75rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 1rem;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  pointer-events: none;
}

.toast-message {
  pointer-events: auto;
  padding: 0.9rem 1.35rem;
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  font-size: 0.92rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  animation: slideToast 0.3s ease;
}

@keyframes slideToast {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

.toast-message.success { border-left: 4px solid var(--success); }
.toast-message.error { border-left: 4px solid var(--danger); }
.toast-message.info { border-left: 4px solid var(--info); }

/* Loading Spinner Overlay */
.loading-overlay {
  position: absolute;
  inset: 0;
  background: rgba(9, 9, 11, 0.85);
  backdrop-filter: blur(10px);
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  z-index: 50;
}

[data-theme="light"] .loading-overlay {
  background: rgba(255, 255, 255, 0.88);
}

.loading-overlay.active {
  display: flex;
}

.loading-spinner-ring {
  width: 58px;
  height: 58px;
  border: 4px solid rgba(99, 102, 241, 0.2);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-text {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-primary);
}

.loading-subtext {
  font-size: 0.85rem;
  color: var(--text-muted);
}