/* ==========================================================================
   StudioShot — Premium AI Product Photo Editor Stylesheet
   Pure CSS • Zero build step • Ultra-clean commercial aesthetic
   ========================================================================== */

:root {
  /* Color Palette */
  --bg-main: #F9FAFB;
  --bg-card: #FFFFFF;
  --bg-subtle: #F1F3F5;
  --bg-hover: #F8F9FA;
  
  --text-primary: #0F172A;
  --text-secondary: #475569;
  --text-tertiary: #94A3B8;
  --text-inverse: #FFFFFF;

  --border-light: #E2E8F0;
  --border-focus: #6366F1;
  --border-card: #E5E7EB;

  --accent-primary: #4F46E5;
  --accent-primary-hover: #4338CA;
  --accent-primary-light: #EEF2FF;
  --accent-subtle: #818CF8;

  --success: #10B981;
  --success-bg: #ECFDF5;
  --error: #EF4444;
  --error-bg: #FEF2F2;

  /* Typography */
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  
  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.03);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.07), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.09), 0 8px 10px -6px rgba(15, 23, 42, 0.04);

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* Transitions */
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --trans-fast: 150ms var(--ease);
  --trans-normal: 250ms var(--ease);
}

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

html, body {
  height: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Layout Shell */
.app-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.app-header {
  height: 60px;
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border-light);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-container {
  max-width: 1400px;
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
}

.brand-icon {
  width: 32px;
  height: 32px;
  background-color: var(--text-primary);
  color: var(--text-inverse);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-name {
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: -0.02em;
}

.brand-badge {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: var(--bg-subtle);
  color: var(--text-secondary);
  padding: 2px 7px;
  border-radius: var(--radius-full);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-subtle);
  padding: 4px 10px;
  border-radius: var(--radius-full);
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--success);
  box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
}

/* Toast Container */
.toast-container {
  position: fixed;
  top: 76px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 90%;
  max-width: 520px;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 18px;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-light);
  font-size: 0.875rem;
  animation: toastIn 0.2s var(--ease);
}

.toast.toast-error {
  border-color: rgba(239, 68, 68, 0.3);
  background: #FFFBFB;
  color: #991B1B;
}

.toast.toast-success {
  border-color: rgba(16, 185, 129, 0.3);
  background: #F0FDF4;
  color: #166534;
}

.toast-close {
  background: transparent;
  border: none;
  cursor: pointer;
  color: inherit;
  opacity: 0.7;
  display: flex;
  align-items: center;
}

.toast-close:hover {
  opacity: 1;
}

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateY(-8px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Main Content Area */
.main-content {
  flex: 1;
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
  padding: 24px;
}

/* View Sections */
.view-section {
  display: none;
  opacity: 0;
  transition: opacity 0.25s ease;
}

.view-section.active {
  display: block;
  opacity: 1;
}

/* ==========================================================================
   1. UPLOAD VIEW (Designed to be fully visible at 1440x900 without scroll)
   ========================================================================== */
.upload-screen-container {
  max-width: 920px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.hero-block {
  text-align: center;
  margin-top: 4px;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent-primary-light);
  color: var(--accent-primary);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 12px;
  letter-spacing: 0.02em;
}

.hero-sparkle {
  color: var(--accent-subtle);
  font-size: 0.8rem;
}

.hero-title {
  font-size: 2.125rem;
  font-weight: 700;
  letter-spacing: -0.035em;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.18;
}

.hero-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.45;
}

.upload-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-xl);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.drop-zone {
  border: 2px dashed #CBD5E1;
  background-color: #F8FAFC;
  border-radius: var(--radius-lg);
  padding: 40px 24px;
  text-align: center;
  cursor: pointer;
  transition: all var(--trans-normal);
  position: relative;
  outline: none;
}

.drop-zone:hover, .drop-zone:focus-visible {
  border-color: var(--accent-primary);
  background-color: #EEF2FF;
}

.drop-zone.dragover {
  border-color: var(--accent-primary);
  background-color: #EEF2FF;
  transform: scale(0.995);
  box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.15);
}

.drop-zone-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.drop-icon-wrapper {
  width: 58px;
  height: 58px;
  background: #FFFFFF;
  color: var(--accent-primary);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
}

.drop-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.drop-browse-link {
  color: var(--accent-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.drop-helper {
  font-size: 0.84rem;
  color: var(--text-secondary);
}

.drop-specs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 4px;
}

.spec-tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: #FFFFFF;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-light);
}

.spec-tag svg {
  color: var(--success);
}

/* Sample Products Section */
.samples-wrapper {
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--border-light);
}

.samples-header {
  margin-bottom: 12px;
}

.samples-label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.samples-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.sample-card {
  background: var(--bg-main);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 8px;
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  text-align: left;
  transition: all var(--trans-fast);
}

.sample-card:hover {
  border-color: var(--accent-primary);
  background: #FFFFFF;
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.sample-img-box {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: #E2E8F0;
  flex-shrink: 0;
}

.sample-img-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.sample-info {
  display: flex;
  flex-direction: column;
}

.sample-title {
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text-primary);
}

.sample-hint {
  font-size: 0.72rem;
  color: var(--text-tertiary);
}

/* ==========================================================================
   2. WORKSPACE / EDITOR VIEW
   ========================================================================== */
.editor-container {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 24px;
  align-items: start;
}

.canvas-card, .controls-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-xl);
  padding: 22px;
  box-shadow: var(--shadow-sm);
}

/* Left Canvas */
.canvas-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
}

.canvas-label-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.badge-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 3px 9px;
  border-radius: var(--radius-full);
}

.badge-original {
  background: var(--bg-subtle);
  color: var(--text-secondary);
}

.badge-success {
  background: var(--success-bg);
  color: #065F46;
}

.image-meta {
  font-size: 0.78rem;
  color: var(--text-tertiary);
  font-weight: 500;
}

.canvas-preview-wrapper {
  position: relative;
  background: #F8FAFC;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  height: 520px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.canvas-stage {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background-image: 
    linear-gradient(45deg, #F1F5F9 25%, transparent 25%),
    linear-gradient(-45deg, #F1F5F9 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #F1F5F9 75%),
    linear-gradient(-45deg, transparent 75%, #F1F5F9 75%);
  background-size: 16px 16px;
  background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
}

.canvas-image {
  max-width: 94%;
  max-height: 94%;
  object-fit: contain;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  transition: opacity 0.3s ease;
}

.canvas-footer-tip {
  margin-top: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

.canvas-footer-tip svg {
  color: var(--accent-subtle);
  flex-shrink: 0;
}

/* Scanning Overlay in Preview */
.editing-scan-overlay {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(4px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 10;
  overflow: hidden;
}

.scan-beam {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, #818CF8, #FFFFFF, #818CF8, transparent);
  box-shadow: 0 0 15px #818CF8;
  animation: scanSweep 2.2s ease-in-out infinite alternate;
}

@keyframes scanSweep {
  0% { top: 5%; }
  100% { top: 95%; }
}

.scan-status-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 255, 255, 0.95);
  color: var(--text-primary);
  padding: 10px 20px;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg);
  font-size: 0.875rem;
  font-weight: 600;
  animation: pulseCard 2s ease infinite;
}

@keyframes pulseCard {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.02); }
}

/* Right Controls Column */
.controls-card {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.control-section {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.section-title-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.section-title {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.section-subtitle {
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

/* Quick Actions Grid */
.quick-actions-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.quick-action-btn {
  background: var(--bg-main);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 9px 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: all var(--trans-fast);
  text-align: left;
}

.quick-action-btn:hover {
  background: #FFFFFF;
  border-color: var(--accent-subtle);
  color: var(--accent-primary);
  box-shadow: var(--shadow-xs);
  transform: translateY(-1px);
}

.quick-action-btn.active {
  border-color: var(--accent-primary);
  background: var(--accent-primary-light);
  color: var(--accent-primary);
}

.qa-icon {
  font-size: 0.95rem;
}

/* Textarea Container */
.textarea-container {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

textarea#instruction-input {
  width: 100%;
  font-family: inherit;
  font-size: 0.875rem;
  color: var(--text-primary);
  background: #FFFFFF;
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  resize: vertical;
  min-height: 100px;
  outline: none;
  line-height: 1.5;
  transition: border-color var(--trans-fast), box-shadow var(--trans-fast);
}

textarea#instruction-input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
}

.textarea-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.72rem;
  color: var(--text-tertiary);
}

/* Guarantee Box */
.guarantee-box {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background: #F8FAFC;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 12px 14px;
}

.guarantee-icon {
  color: var(--accent-primary);
  flex-shrink: 0;
  margin-top: 1px;
}

.guarantee-text strong {
  font-size: 0.8125rem;
  color: var(--text-primary);
  display: block;
  margin-bottom: 2px;
}

.guarantee-text p {
  font-size: 0.75rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

/* ==========================================================================
   3. RESULT VIEW — SIDE BY SIDE & DETAIL SHOWCASE
   ========================================================================== */
.result-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.result-top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.result-title-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.result-heading {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text-primary);
}

.result-mode-toggles {
  display: inline-flex;
  background: #E2E8F0;
  padding: 3px;
  border-radius: var(--radius-md);
  gap: 2px;
}

.mode-tab {
  background: transparent;
  border: none;
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all var(--trans-fast);
}

.mode-tab:hover {
  color: var(--text-primary);
}

.mode-tab.active {
  background: #FFFFFF;
  color: var(--text-primary);
  box-shadow: var(--shadow-xs);
}

.result-stage-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-xl);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 18px;
}

/* Result Showcase Container */
.result-showcase-container {
  width: 100%;
}

.result-view-grid {
  display: grid;
  gap: 20px;
  width: 100%;
}

.result-view-grid.mode-side {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.result-view-grid.mode-single {
  grid-template-columns: minmax(0, 1fr);
  max-width: 900px;
  margin: 0 auto;
}

/* Individual Result Panel */
.result-panel {
  display: flex;
  flex-direction: column;
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xs);
  transition: border-color var(--trans-fast);
}

.result-panel:hover {
  border-color: #CBD5E1;
}

.result-panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 16px;
  background: #F8FAFC;
  border-bottom: 1px solid var(--border-light);
}

.result-panel-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.result-panel-badge {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.result-panel-badge.badge-before {
  background: var(--bg-subtle);
  color: var(--text-secondary);
}

.result-panel-badge.badge-after {
  background: var(--accent-primary-light);
  color: var(--accent-primary);
}

.result-panel-stage {
  position: relative;
  height: 520px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background-color: #FAFAFC;
  background-image: 
    linear-gradient(45deg, #F1F5F9 25%, transparent 25%),
    linear-gradient(-45deg, #F1F5F9 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #F1F5F9 75%),
    linear-gradient(-45deg, transparent 75%, #F1F5F9 75%);
  background-size: 16px 16px;
  background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
}

.result-panel-img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  display: block;
}

/* Result Toolbar */
.result-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 6px;
}

.toolbar-left, .toolbar-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ==========================================================================
   Buttons & UI Elements
   ========================================================================== */
button, a.btn-primary {
  font-family: inherit;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--trans-fast);
  border: none;
}

.btn-primary {
  background-color: var(--accent-primary);
  color: var(--text-inverse);
  padding: 10px 20px;
  font-size: 0.875rem;
  box-shadow: 0 1px 2px rgba(79, 70, 229, 0.2);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--accent-primary-hover);
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.25);
  transform: translateY(-1px);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn-secondary {
  background: #FFFFFF;
  color: var(--text-primary);
  border: 1px solid var(--border-light);
  padding: 10px 18px;
  font-size: 0.875rem;
}

.btn-secondary:hover {
  background: var(--bg-subtle);
  border-color: #CBD5E1;
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  padding: 10px 16px;
  font-size: 0.875rem;
}

.btn-ghost:hover {
  background: var(--bg-subtle);
  color: var(--text-primary);
}

.btn-text {
  background: transparent;
  color: var(--accent-primary);
  padding: 4px 8px;
  font-size: 0.8125rem;
}

.btn-text:hover {
  text-decoration: underline;
}

.btn-large {
  padding: 12px 24px;
  font-size: 0.95rem;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.8125rem;
}

.btn-xs {
  padding: 2px 6px;
  font-size: 0.75rem;
}

.btn-block {
  width: 100%;
}

/* Spinners */
.spinner-sm {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(79, 70, 229, 0.25);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.spinner-white {
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #FFFFFF;
}

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

/* Footer */
.app-footer {
  border-top: 1px solid var(--border-light);
  background: var(--bg-card);
  padding: 16px 24px;
  margin-top: auto;
}

.footer-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-size: 0.78rem;
  color: var(--text-tertiary);
}

.footer-sep {
  opacity: 0.5;
}

/* Helper hidden */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1024px) {
  .editor-container {
    grid-template-columns: 1fr;
  }
  .canvas-preview-wrapper {
    height: 420px;
  }
  .result-panel-stage {
    height: 440px;
  }
}

@media (max-width: 768px) {
  .main-content {
    padding: 16px;
  }
  .hero-title {
    font-size: 1.65rem;
  }
  .samples-grid {
    grid-template-columns: 1fr;
  }
  .quick-actions-grid {
    grid-template-columns: 1fr;
  }
  .canvas-preview-wrapper {
    height: 340px;
  }
  .result-view-grid.mode-side {
    grid-template-columns: 1fr;
  }
  .result-panel-stage {
    height: 360px;
  }
  .result-top-bar {
    flex-direction: column;
    align-items: flex-start;
  }
  .result-toolbar {
    flex-direction: column;
    width: 100%;
  }
  .toolbar-left, .toolbar-right {
    width: 100%;
    justify-content: stretch;
  }
  .toolbar-left button, .toolbar-right a {
    flex: 1;
  }
}