frontend/src/app/globals.css

/* ===== NEUBRUTALISM DESIGN SYSTEM (DESIGN.md) ===== */

:root {
  /* Neubrutalism Color Palette */
  --color-primary: #FFEB3B;      /* Dominant Yellow */
  --color-secondary: #FF5252;    /* Vibrant Coral / Red */
  --color-tertiary: #2196F3;     /* Supporting Blue */
  --color-black: #000000;        /* Pure black for outlines & shadows */

  /* Light Theme Canvas */
  --bg-base: #FFFDE7;            /* Soft warm pastel yellow-cream base */
  --bg-surface: #FFFFFF;
  --bg-card: #FFFFFF;
  --bg-card-muted: #F8F9FA;
  --bg-input: #FFFFFF;
  --bg-accent-soft: #FFF9C4;     /* Light yellow tint */

  --text-primary: #121212;       /* Charcoal off-black */
  --text-secondary: #27272A;
  --text-muted: #52525B;

  --border-color: #000000;
  --border-width: 3px;
  --border-stroke: 3px solid #000000;
  --border-stroke-sm: 2px solid #000000;

  --shadow-offset-xs: 2px 2px 0 #000000;
  --shadow-offset: 4px 4px 0 #000000;
  --shadow-card: 6px 6px 0 #000000;
  --shadow-hover: 8px 8px 0 #000000;
  --shadow-inset: inset 2px 2px 0 #000000;

  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-base: 8px;            /* 0.5rem base corner radius per DESIGN.md */
  --radius-md: 8px;
  --radius-lg: 12px;

  --font-mono: var(--font-mono, "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace);
  --font-sans: var(--font-sans, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif);
}

[data-theme="dark"] {
  /* Dark Theme Canvas (Full Dark Mode per DESIGN.md) */
  --bg-base: #121215;            /* Deep charcoal canvas */
  --bg-surface: #1C1C21;
  --bg-card: #1F1F24;
  --bg-card-muted: #27272D;
  --bg-input: #18181C;
  --bg-accent-soft: #2B281B;     /* Dark yellow tint */

  --text-primary: #FAFAFA;
  --text-secondary: #E4E4E7;
  --text-muted: #A1A1AA;

  --border-color: #000000;
  --border-stroke: 3px solid #000000;
  --border-stroke-sm: 2px solid #000000;

  --shadow-offset-xs: 2px 2px 0 #000000;
  --shadow-offset: 4px 4px 0 #000000;
  --shadow-card: 6px 6px 0 #000000;
  --shadow-hover: 8px 8px 0 #000000;
}

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-base);
  color: var(--text-primary);
  min-height: 100dvh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.2s ease, color 0.2s ease;
}

/* Accessible high-contrast focus visible ring */
:focus-visible {
  outline: 3px solid var(--color-tertiary);
  outline-offset: 3px;
}

/* Typography Scale per DESIGN.md */
h1 {
  font-size: clamp(2.25rem, 4.5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text-primary);
}

h2 {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

p {
  font-size: 1rem;
  line-height: 1.6;
  max-width: 72ch;
}

code, .mono {
  font-family: var(--font-mono);
}

/* ===== APP LAYOUT & CONTAINER ===== */
.app-wrapper {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-base);
  position: relative;
  overflow-x: hidden;
}

/* Max-width containment: 1280px centered with 1.5rem side padding (DESIGN.md) */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ===== HEADER & NAVIGATION ===== */
.header {
  padding: 16px 0;
  background-color: var(--bg-surface);
  border-bottom: 3px solid var(--color-black);
  position: sticky;
  top: 0;
  z-index: 100; /* z-index contract: sticky-nav (100) */
  transition: background-color 0.2s ease;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
}

.logo-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  background-color: var(--color-primary);
  border: 3px solid var(--color-black);
  border-radius: var(--radius-base);
  box-shadow: 3px 3px 0 var(--color-black);
  color: var(--color-black);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.logo:hover .logo-badge {
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 var(--color-black);
}

.logo-title-group {
  display: flex;
  flex-direction: column;
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  line-height: 1.1;
}

.logo-sub {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
}

.header-meta {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Theme Toggle Button (Neubrutalism) */
.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 16px;
  background-color: var(--bg-card);
  border: 3px solid var(--color-black);
  border-radius: var(--radius-base);
  box-shadow: var(--shadow-offset);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 700;
  cursor: pointer;
  user-select: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
}

.theme-toggle-btn:hover {
  background-color: var(--color-primary);
  color: var(--color-black);
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-hover);
}

.theme-toggle-btn:active {
  transform: translate(2px, 2px);
  box-shadow: var(--shadow-offset-xs);
}

.theme-toggle-label {
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

/* Hugging Face Link Button */
.hf-link {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 16px;
  background-color: var(--color-tertiary);
  color: #FFFFFF;
  border: 3px solid var(--color-black);
  border-radius: var(--radius-base);
  box-shadow: var(--shadow-offset);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.hf-link:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-hover);
  color: #FFFFFF;
}

.hf-link:active {
  transform: translate(2px, 2px);
  box-shadow: var(--shadow-offset-xs);
}

/* ===== HERO SECTION: SPLIT-SCREEN (DESIGN.md) ===== */
.hero {
  padding: clamp(3rem, 6vw, 5rem) 0 clamp(2rem, 4vw, 3.5rem);
}

.hero-split-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.hero-tag-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  align-self: flex-start;
  padding: 6px 14px;
  background-color: var(--color-primary);
  color: var(--color-black);
  border: 3px solid var(--color-black);
  border-radius: var(--radius-base);
  box-shadow: var(--shadow-offset-xs);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.hero-title {
  margin: 0;
  color: var(--text-primary);
}

.hero-desc {
  font-size: 1.125rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.hero-feature-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 6px;
}

.feature-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border: 2px solid var(--color-black);
  border-radius: var(--radius-xs);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  box-shadow: var(--shadow-offset-xs);
}

.feature-chip.chip-yellow {
  background-color: var(--color-primary);
  color: var(--color-black);
}

.feature-chip.chip-blue {
  background-color: var(--color-tertiary);
  color: #FFFFFF;
}

.feature-chip.chip-red {
  background-color: var(--color-secondary);
  color: #FFFFFF;
}

/* Hero Visual Card (Neubrutalist Showcase) */
.hero-visual-card {
  background-color: var(--bg-card);
  border: 3px solid var(--color-black);
  border-radius: var(--radius-base);
  box-shadow: var(--shadow-card);
  padding: 20px;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.hero-visual-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 2px solid var(--color-black);
  padding-bottom: 12px;
}

.hero-visual-dots {
  display: flex;
  gap: 6px;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid var(--color-black);
}

.dot-red { background-color: var(--color-secondary); }
.dot-yellow { background-color: var(--color-primary); }
.dot-blue { background-color: var(--color-tertiary); }

.hero-visual-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
}

.hero-visual-preview {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.visual-preview-box {
  border: 2px solid var(--color-black);
  border-radius: var(--radius-xs);
  padding: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-offset-xs);
  background-color: var(--bg-card);
}

.visual-preview-box.box-original {
  background-color: var(--bg-card-muted);
}

.visual-preview-box.box-cutout {
  background-color: var(--color-accent-soft);
  background-image:
    linear-gradient(45deg, rgba(0,0,0,0.06) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(0,0,0,0.06) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(0,0,0,0.06) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(0,0,0,0.06) 75%);
  background-size: 12px 12px;
}

[data-theme="dark"] .visual-preview-box.box-cutout {
  background-color: #1a1a20;
  background-image:
    linear-gradient(45deg, rgba(255,255,255,0.06) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(255,255,255,0.06) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(255,255,255,0.06) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(255,255,255,0.06) 75%);
  background-size: 12px 12px;
}

.visual-preview-img-frame {
  width: 100%;
  aspect-ratio: 1 / 1;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.visual-preview-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  user-select: none;
  pointer-events: none;
}

.visual-preview-footer {
  width: 100%;
  padding: 8px 4px;
  background-color: var(--bg-card);
  border-top: 2px solid var(--color-black);
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
}

.visual-preview-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-primary);
}

.hero-visual-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--color-primary);
  color: var(--color-black);
  border: 2px solid var(--color-black);
  border-radius: var(--radius-xs);
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
}

/* ===== MAIN TOOL CARD (NEUBRUTALISM) ===== */
.main-card {
  background-color: var(--bg-card);
  border: 3px solid var(--color-black);
  border-radius: var(--radius-base);
  padding: clamp(20px, 3vw, 32px);
  box-shadow: var(--shadow-card);
  margin-bottom: clamp(3rem, 6vw, 5rem);
}

/* Configuration grid */
.config-grid {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 20px;
  margin-bottom: 24px;
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.field-label {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.select-control {
  width: 100%;
  min-height: 48px;
  padding: 10px 14px;
  background-color: var(--bg-input);
  border: 3px solid var(--color-black);
  border-radius: var(--radius-base);
  box-shadow: var(--shadow-offset);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  outline: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.select-control:focus {
  outline: 3px solid var(--color-tertiary);
  outline-offset: 2px;
}

.select-control:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Toggle card (Alpha Matting) */
.toggle-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background-color: var(--bg-input);
  border: 3px solid var(--color-black);
  border-radius: var(--radius-base);
  box-shadow: var(--shadow-offset);
  cursor: pointer;
  user-select: none;
  min-height: 48px;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
}

.toggle-card:hover {
  transform: translate(-1px, -1px);
  box-shadow: 5px 5px 0 var(--color-black);
}

.toggle-card input[type="checkbox"] {
  width: 20px;
  height: 20px;
  cursor: pointer;
  accent-color: var(--color-primary);
}

.toggle-text {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
}

/* ===== DROPZONE & UPLOAD (NEUBRUTALISM) ===== */
.dropzone {
  border: 3px dashed var(--color-black);
  border-radius: var(--radius-base);
  background-color: var(--bg-card-muted);
  box-shadow: var(--shadow-offset);
  padding: 56px 24px;
  text-align: center;
  cursor: pointer;
  position: relative;
  transition: background-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

.dropzone:hover,
.dropzone.drag-active {
  background-color: var(--bg-accent-soft);
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-hover);
}

.dropzone-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.dropzone-icon {
  width: 60px;
  height: 60px;
  background-color: var(--color-primary);
  border: 3px solid var(--color-black);
  border-radius: var(--radius-base);
  box-shadow: var(--shadow-offset-xs);
  color: var(--color-black);
  display: flex;
  align-items: center;
  justify-content: center;
}

.dropzone-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
}

.dropzone-hint {
  font-size: 0.875rem;
  color: var(--text-secondary);
  max-width: 520px;
  line-height: 1.5;
}

/* Uploaded Image Preview */
.preview-container {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.preview-media-box {
  background-color: var(--bg-card-muted);
  border: 3px solid var(--color-black);
  border-radius: var(--radius-base);
  box-shadow: var(--shadow-offset);
  padding: 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 280px;
  max-height: 480px;
  overflow: hidden;
}

.preview-img {
  max-width: 100%;
  max-height: 440px;
  object-fit: contain;
  border: 2px solid var(--color-black);
  border-radius: var(--radius-xs);
}

.preview-meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 4px;
  flex-wrap: wrap;
  gap: 12px;
}

.meta-info {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.meta-filename {
  font-weight: 700;
  color: var(--text-primary);
  max-width: 320px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.meta-badge {
  background-color: var(--color-primary);
  color: var(--color-black);
  border: 2px solid var(--color-black);
  box-shadow: var(--shadow-offset-xs);
  padding: 4px 10px;
  border-radius: var(--radius-xs);
  font-size: 0.75rem;
  font-weight: 700;
}

.btn-ghost-small {
  background-color: var(--bg-card);
  border: 3px solid var(--color-black);
  border-radius: var(--radius-base);
  box-shadow: var(--shadow-offset-xs);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 700;
  padding: 0 16px;
  cursor: pointer;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
}

.btn-ghost-small:hover:not(:disabled) {
  background-color: var(--color-secondary);
  color: #FFFFFF;
  transform: translate(-1px, -1px);
  box-shadow: var(--shadow-offset);
}

.btn-ghost-small:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Stepped Progress bar (Neubrutalism) */
.progress-wrapper {
  margin-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.progress-header {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--text-primary);
}

.progress-value {
  font-weight: 800;
  color: var(--color-secondary);
}

.progress-track {
  height: 16px;
  background-color: var(--bg-card-muted);
  border: 3px solid var(--color-black);
  border-radius: var(--radius-base);
  box-shadow: var(--shadow-offset-xs);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background-color: var(--color-primary);
  border-right: 2px solid var(--color-black);
  transition: width 0.3s ease;
}

/* Error message banner (Neubrutalism) */
.error-banner {
  margin-top: 20px;
  padding: 14px 18px;
  background-color: var(--color-secondary);
  border: 3px solid var(--color-black);
  border-radius: var(--radius-base);
  box-shadow: var(--shadow-offset);
  color: #FFFFFF;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Turnstile container */
.turnstile-box {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 65px;
}

.turnstile-notice {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
}

/* Action button area */
.action-row {
  margin-top: 24px;
  display: flex;
  gap: 16px;
}

/* Primary Button (Neubrutalism per DESIGN.md: Yellow fill, 3px black border, offset shadow, tactile press) */
.btn-primary {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background-color: var(--color-primary);
  color: var(--color-black);
  border: 3px solid var(--color-black);
  border-radius: var(--radius-base);
  box-shadow: var(--shadow-offset);
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 700;
  padding: 14px 24px;
  cursor: pointer;
  user-select: none;
  min-height: 48px;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
}

.btn-primary:hover:not(:disabled) {
  background-color: #FDD835; /* 8% darken per DESIGN.md */
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-hover);
}

.btn-primary:active:not(:disabled) {
  transform: translate(2px, 2px);
  box-shadow: var(--shadow-offset-xs);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: var(--shadow-offset);
}

/* Secondary Button (Outline variant with tactile press) */
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background-color: var(--bg-card);
  color: var(--text-primary);
  border: 3px solid var(--color-black);
  border-radius: var(--radius-base);
  box-shadow: var(--shadow-offset);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 700;
  padding: 12px 20px;
  cursor: pointer;
  user-select: none;
  min-height: 48px;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease, color 0.15s ease;
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--color-tertiary);
  color: #FFFFFF;
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-hover);
}

.btn-secondary:active:not(:disabled) {
  transform: translate(2px, 2px);
  box-shadow: var(--shadow-offset-xs);
}

.btn-secondary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* Loading spinner */
.spinner-icon {
  width: 18px;
  height: 18px;
  border: 3px solid rgba(0, 0, 0, 0.2);
  border-top-color: var(--color-black);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

/* ===== RESULT SECTION (NEUBRUTALISM) ===== */
.result-section {
  margin-top: 32px;
  background-color: var(--bg-card);
  border: 3px solid var(--color-black);
  border-radius: var(--radius-base);
  padding: clamp(20px, 3vw, 32px);
  box-shadow: var(--shadow-card);
  margin-bottom: clamp(3rem, 6vw, 5rem);
}

.result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 16px;
  border-bottom: 2px solid var(--color-black);
  padding-bottom: 16px;
}

.result-title-group {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.result-title {
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--text-primary);
}

.result-meta-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  background-color: var(--color-tertiary);
  color: #FFFFFF;
  border: 2px solid var(--color-black);
  box-shadow: var(--shadow-offset-xs);
  padding: 4px 10px;
  border-radius: var(--radius-xs);
}

.result-controls-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

/* View mode switcher (Hasil vs Asli) */
.view-mode-group {
  display: flex;
  align-items: center;
  background-color: var(--bg-card-muted);
  border: 2px solid var(--color-black);
  border-radius: var(--radius-base);
  padding: 4px;
  gap: 4px;
}

.control-tab-btn {
  background: transparent;
  border: 2px solid transparent;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--text-secondary);
  padding: 0 14px;
  border-radius: var(--radius-xs);
  cursor: pointer;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  transition: all 0.15s ease;
}

.control-tab-btn.active {
  background-color: var(--color-primary);
  color: var(--color-black);
  border: 2px solid var(--color-black);
  box-shadow: var(--shadow-offset-xs);
}

/* Preview background inspector toggle */
.bg-inspector-group {
  display: flex;
  align-items: center;
  background-color: var(--bg-card-muted);
  border: 2px solid var(--color-black);
  border-radius: var(--radius-base);
  padding: 4px;
  gap: 4px;
}

.bg-inspector-btn {
  background: transparent;
  border: 2px solid transparent;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--text-secondary);
  padding: 0 12px;
  border-radius: var(--radius-xs);
  cursor: pointer;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  transition: all 0.15s ease;
}

.bg-inspector-btn.active {
  background-color: var(--bg-card);
  color: var(--text-primary);
  border: 2px solid var(--color-black);
  box-shadow: var(--shadow-offset-xs);
}

/* Canvas backgrounds */
.result-canvas {
  border: 3px solid var(--color-black);
  border-radius: var(--radius-base);
  box-shadow: var(--shadow-offset);
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 340px;
  max-height: 540px;
  overflow: hidden;
  transition: background-color 0.2s ease;
}

.result-canvas.checkerboard {
  background-image:
    linear-gradient(45deg, #E0E0E0 25%, transparent 25%),
    linear-gradient(-45deg, #E0E0E0 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #E0E0E0 75%),
    linear-gradient(-45deg, transparent 75%, #E0E0E0 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
  background-color: #FFFFFF;
}

[data-theme="dark"] .result-canvas.checkerboard {
  background-image:
    linear-gradient(45deg, #2B2B30 25%, transparent 25%),
    linear-gradient(-45deg, #2B2B30 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #2B2B30 75%),
    linear-gradient(-45deg, transparent 75%, #2B2B30 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
  background-color: #1A1A1F;
}

.result-canvas.white {
  background-color: #FFFFFF;
}

.result-canvas.dark {
  background-color: #121212;
}

.result-canvas.original-bg {
  background-color: var(--bg-card-muted);
}

.result-image {
  max-width: 100%;
  max-height: 480px;
  object-fit: contain;
  border: 2px solid var(--color-black);
  border-radius: var(--radius-xs);
  box-shadow: var(--shadow-offset-xs);
}

.result-footer-actions {
  margin-top: 24px;
  display: flex;
  gap: 16px;
}

/* Reprocess panel in result card */
.reprocess-panel {
  margin-top: 28px;
  padding: 20px;
  background-color: var(--bg-accent-soft);
  border: 3px solid var(--color-black);
  border-radius: var(--radius-base);
  box-shadow: var(--shadow-offset);
}

.reprocess-header {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 16px;
}

.reprocess-title {
  font-size: 1rem;
  font-weight: 800;
  color: var(--text-primary);
}

.reprocess-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.reprocess-controls {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.reprocess-field {
  flex: 1;
  min-width: 240px;
}

.reprocess-tip {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
}

/* ===== FEATURE / INFORMATION SECTION: ZIG-ZAG ROWS (DESIGN.md) ===== */
.info-section {
  padding: clamp(2rem, 4vw, 4rem) 0 clamp(3rem, 6vw, 5rem);
}

.section-headline-group {
  margin-bottom: 32px;
}

.section-tag {
  display: inline-block;
  padding: 4px 10px;
  background-color: var(--color-tertiary);
  color: #FFFFFF;
  border: 2px solid var(--color-black);
  border-radius: var(--radius-xs);
  box-shadow: var(--shadow-offset-xs);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.zigzag-container {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.zigzag-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  align-items: stretch;
}

.info-card {
  background-color: var(--bg-card);
  border: 3px solid var(--color-black);
  border-radius: var(--radius-base);
  box-shadow: var(--shadow-card);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.info-card-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  border-bottom: 2px solid var(--color-black);
  padding-bottom: 12px;
}

.info-card-badge {
  padding: 4px 10px;
  border: 2px solid var(--color-black);
  border-radius: var(--radius-xs);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 800;
  text-transform: uppercase;
}

.badge-yellow { background-color: var(--color-primary); color: var(--color-black); }
.badge-blue { background-color: var(--color-tertiary); color: #FFFFFF; }
.badge-red { background-color: var(--color-secondary); color: #FFFFFF; }

.info-card h2 {
  font-size: 1.25rem;
  margin: 0;
}

.model-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.model-item {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
  padding: 8px 12px;
  border: 2px solid var(--color-black);
  border-radius: var(--radius-xs);
  background-color: var(--bg-card-muted);
}

.model-item strong {
  color: var(--text-primary);
  font-family: var(--font-mono);
  display: inline-block;
  margin-right: 6px;
}

/* Visual companion card for zigzag rows */
.spec-highlight-card {
  background-color: var(--color-primary);
  color: var(--color-black);
  border: 3px solid var(--color-black);
  border-radius: var(--radius-base);
  box-shadow: var(--shadow-card);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 16px;
}

.spec-highlight-card.card-blue {
  background-color: var(--color-tertiary);
  color: #FFFFFF;
}

.spec-highlight-card.card-blue h3,
.spec-highlight-card.card-blue p,
.spec-highlight-card.card-blue .spec-stat-label {
  color: #FFFFFF;
}

.spec-highlight-title {
  font-size: 1.375rem;
  font-weight: 800;
  line-height: 1.2;
}

.spec-stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 12px;
}

.spec-stat-box {
  background-color: var(--bg-card);
  color: var(--text-primary);
  border: 2px solid var(--color-black);
  border-radius: var(--radius-xs);
  box-shadow: var(--shadow-offset-xs);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.spec-stat-val {
  font-family: var(--font-mono);
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--color-secondary);
}

.spec-stat-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-secondary);
}

/* ===== FOOTER ===== */
.footer {
  margin-top: auto;
  padding: 32px 0;
  background-color: var(--bg-surface);
  border-top: 3px solid var(--color-black);
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-text {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--text-primary);
}

.footer-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-link {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  padding: 6px 12px;
  border: 2px solid var(--color-black);
  border-radius: var(--radius-xs);
  background-color: var(--bg-card);
  box-shadow: var(--shadow-offset-xs);
  transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
}

.footer-link:hover {
  background-color: var(--color-primary);
  color: var(--color-black);
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0 var(--color-black);
}

/* ===== BEFORE/AFTER INTERACTIVE DEMO SHOWCASE SECTION (DESIGN.md) ===== */
.demo-section {
  padding: clamp(2rem, 4vw, 3.5rem) 0;
  margin-bottom: clamp(2rem, 4vw, 3.5rem);
}

.demo-card {
  background-color: var(--bg-card);
  border: 3px solid var(--color-black);
  border-radius: var(--radius-base);
  box-shadow: var(--shadow-card);
  padding: clamp(20px, 3.5vw, 36px);
}

.demo-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 24px;
  border-bottom: 2px solid var(--color-black);
  padding-bottom: 16px;
}

.demo-header-info {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 680px;
}

.demo-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  align-self: flex-start;
  padding: 4px 10px;
  background-color: var(--color-primary);
  color: var(--color-black);
  border: 2px solid var(--color-black);
  border-radius: var(--radius-xs);
  box-shadow: var(--shadow-offset-xs);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
}

.demo-title {
  font-size: clamp(1.375rem, 2.5vw, 1.75rem);
  font-weight: 800;
  color: var(--text-primary);
  margin: 0;
}

.demo-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.demo-status-pill {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 6px 12px;
  border: 2px solid var(--color-black);
  border-radius: var(--radius-xs);
  box-shadow: var(--shadow-offset-xs);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.demo-status-pill.pill-ready {
  background-color: var(--color-primary);
  color: var(--color-black);
}

.demo-status-pill.pill-processing {
  background-color: var(--color-tertiary);
  color: #FFFFFF;
}

.demo-status-pill.pill-idle {
  background-color: var(--bg-card-muted);
  color: var(--text-secondary);
}

/* Slider frame & container */
.demo-stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.demo-slider-frame {
  position: relative;
  width: 100%;
  max-width: 520px;
  aspect-ratio: 1 / 1;
  border: 3px solid var(--color-black);
  border-radius: var(--radius-base);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  user-select: none;
  background-color: var(--bg-card-muted);
}

/* Checkerboard for transparent after layer */
.demo-layer-after {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-image:
    linear-gradient(45deg, #E0E0E0 25%, transparent 25%),
    linear-gradient(-45deg, #E0E0E0 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #E0E0E0 75%),
    linear-gradient(-45deg, transparent 75%, #E0E0E0 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
  background-color: #FFFFFF;
}

[data-theme="dark"] .demo-layer-after {
  background-image:
    linear-gradient(45deg, #2A2A30 25%, transparent 25%),
    linear-gradient(-45deg, #2A2A30 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #2A2A30 75%),
    linear-gradient(-45deg, transparent 75%, #2A2A30 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
  background-color: #16161B;
}

.demo-layer-before {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: var(--bg-card-muted);
}

.demo-img {
  width: 100%;
  max-width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  pointer-events: none;
}

/* Vertical divider line */
.demo-divider {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 3px;
  background-color: var(--color-black);
  z-index: 10;
  pointer-events: none;
}

/* Draggable handle */
.demo-handle {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 44px;
  height: 44px;
  background-color: var(--color-primary);
  border: 3px solid var(--color-black);
  border-radius: 50%;
  box-shadow: var(--shadow-offset-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-black);
  cursor: ew-resize;
  pointer-events: auto;
  touch-action: none;
  transition: transform 0.1s ease;
}

.demo-handle:hover {
  transform: translate(-50%, -50%) scale(1.08);
}

.demo-handle:active {
  transform: translate(-50%, -50%) scale(0.96);
}

/* Badges inside slider */
.demo-badge-floating {
  position: absolute;
  top: 14px;
  z-index: 12;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 800;
  padding: 4px 10px;
  border: 2px solid var(--color-black);
  border-radius: var(--radius-xs);
  box-shadow: var(--shadow-offset-xs);
  pointer-events: none;
}

.demo-badge-before {
  left: 14px;
  background-color: #FFFFFF;
  color: #000000;
}

.demo-badge-after {
  right: 14px;
  background-color: var(--color-primary);
  color: var(--color-black);
}

/* Native accessible range input overlaid for keyboard control */
.demo-range-input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: ew-resize;
  z-index: 15;
  margin: 0;
}

.demo-range-input:focus-visible + .demo-divider .demo-handle {
  outline: 3px solid var(--color-tertiary);
  outline-offset: 4px;
}

/* Slider quick controls / presets */
.demo-quick-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}

.demo-quick-btn {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 700;
  padding: 8px 16px;
  background-color: var(--bg-card);
  color: var(--text-primary);
  border: 2px solid var(--color-black);
  border-radius: var(--radius-xs);
  box-shadow: var(--shadow-offset-xs);
  cursor: pointer;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
}

.demo-quick-btn:hover {
  background-color: var(--color-primary);
  color: var(--color-black);
  transform: translate(-1px, -1px);
  box-shadow: 3px 3px 0 var(--color-black);
}

.demo-quick-btn.active {
  background-color: var(--color-primary);
  color: var(--color-black);
  box-shadow: inset 2px 2px 0 var(--color-black);
}

/* Actions below comparison */
.demo-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: center;
  width: 100%;
  max-width: 580px;
}

.demo-helper-note {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-align: center;
}

/* ===== RESPONSIVE BREAKPOINTS (COLLAPSE BELOW 768px per DESIGN.md) ===== */
@media (max-width: 768px) {
  .hero-split-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .config-grid {
    grid-template-columns: 1fr;
  }

  .main-card {
    padding: 18px;
  }

  .result-section {
    padding: 18px;
  }

  .result-footer-actions {
    flex-direction: column;
  }

  .action-row {
    flex-direction: column;
  }

  .btn-primary, .btn-secondary {
    width: 100%;
  }

  .zigzag-row {
    grid-template-columns: 1fr;
  }

  .footer-content {
    flex-direction: column;
    align-items: flex-start;
  }
}