/* ============================================
   Tesla Custom Wrap Designer - Styles
   A sleek, dark theme inspired by Tesla's aesthetic
   ============================================ */

/* CSS Variables */
:root {
  /* Colors - Light Clean Design (Matching Delivery Checklist) */
  --color-bg-primary: #f5f5f7;
  --color-bg-secondary: #ffffff;
  --color-bg-tertiary: #f0f0f2;
  --color-bg-card: #ffffff;
  --color-bg-card-hover: #f8f8fa;

  --color-text-primary: #1d1d1f;
  --color-text-secondary: #6e6e73;
  --color-text-muted: #999999;

  --color-accent: #0A84FF;
  /* Blue accent */
  --color-accent-hover: #0077ED;
  --color-accent-subtle: rgba(10, 132, 255, 0.1);

  --color-success: #34C759;
  --color-warning: #FF9500;
  --color-info: #5AC8FA;

  --color-border: #d2d2d7;
  --color-border-hover: #b8b8be;

  /* Gradients */
  --gradient-hero: linear-gradient(135deg, #f5f5f7 0%, #ffffff 50%, #f0f0f2 100%);
  --gradient-accent: linear-gradient(135deg, #0A84FF 0%, #5AC8FA 100%);
  --gradient-card: linear-gradient(180deg, rgba(255, 255, 255, 1) 0%, rgba(245, 245, 247, 1) 100%);

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 40px rgba(10, 132, 255, 0.15);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  height: 100%;
}

body {
  font-family: var(--font-family);
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  height: 100%;
  margin: 0;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

ul,
ol {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
}

/* Container */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* Section Titles */
.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--space-sm);
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  text-align: center;
  margin-bottom: var(--space-3xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.gradient-text {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-3xl) var(--space-lg);
  overflow: hidden;
}

.hero__background {
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
  z-index: -2;
}

.hero__background::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  height: 100%;
  background: radial-gradient(ellipse 80% 50% at 50% 20%, rgba(232, 33, 39, 0.08) 0%, transparent 50%);
  z-index: -1;
}

.hero__background::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(0deg,
      transparent,
      transparent 100px,
      rgba(255, 255, 255, 0.01) 100px,
      rgba(255, 255, 255, 0.01) 101px),
    repeating-linear-gradient(90deg,
      transparent,
      transparent 100px,
      rgba(255, 255, 255, 0.01) 100px,
      rgba(255, 255, 255, 0.01) 101px);
}

.hero__content {
  text-align: center;
  max-width: 800px;
  animation: fadeInUp 1s ease-out;
}

.hero__badge {
  display: inline-block;
  padding: var(--space-xs) var(--space-md);
  background: var(--color-accent-subtle);
  border: 1px solid rgba(232, 33, 39, 0.3);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: var(--space-lg);
}

.hero__title {
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-lg);
}

.hero__subtitle {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto var(--space-2xl);
  line-height: 1.7;
}

.hero__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  background: var(--gradient-accent);
  color: white;
  font-weight: 600;
  font-size: 1rem;
  border-radius: var(--radius-full);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.hero__cta:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.hero__cta svg {
  animation: bounce 2s infinite;
}

.hero__scroll-indicator {
  position: absolute;
  bottom: var(--space-2xl);
  left: 50%;
  transform: translateX(-50%);
  opacity: 0.5;
  animation: fadeIn 1s ease-out 1s both;
}

.mouse {
  width: 24px;
  height: 40px;
  border: 2px solid var(--color-text-secondary);
  border-radius: 12px;
  position: relative;
}

.mouse::before {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 8px;
  background: var(--color-text-secondary);
  border-radius: 2px;
  animation: scroll 2s infinite;
}

/* ============================================
   HOW IT WORKS SECTION
   ============================================ */
.how-it-works {
  padding: var(--space-4xl) 0;
  background: var(--color-bg-secondary);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
}

.step-card {
  position: relative;
  padding: var(--space-xl);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: transform var(--transition-base), border-color var(--transition-base);
}

.step-card::before {
  content: attr(data-step);
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  width: 28px;
  height: 28px;
  background: var(--gradient-accent);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  font-weight: 700;
}

.step-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-border-hover);
}

.step-card__icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-subtle);
  border-radius: var(--radius-md);
  color: var(--color-accent);
}

.step-card__title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

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

/* ============================================
   VEHICLE SELECTION SECTION
   ============================================ */
.vehicles {
  padding: var(--space-4xl) 0;
}

.vehicle-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.vehicle-card {
  position: relative;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

.vehicle-card:hover {
  transform: translateY(-6px);
  border-color: var(--color-accent);
  box-shadow: var(--shadow-glow);
}

.vehicle-card__image {
  position: relative;
  height: 160px;
  background: linear-gradient(180deg, var(--color-bg-tertiary) 0%, var(--color-bg-card) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.vehicle-card__placeholder {
  width: 80%;
  height: 80%;
  opacity: 0.15;
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
}

.vehicle-card__img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 0.5rem;
  transition: transform var(--transition-base);
}

.vehicle-card:hover .vehicle-card__img {
  transform: scale(1.05);
}

/* Vehicle Silhouettes using CSS shapes */
.cybertruck-silhouette {
  background: linear-gradient(135deg, transparent 20%, rgba(255, 255, 255, 0.8) 20%, rgba(255, 255, 255, 0.8) 35%, transparent 35%, transparent 65%, rgba(255, 255, 255, 0.8) 65%, rgba(255, 255, 255, 0.8) 80%, transparent 80%);
  clip-path: polygon(5% 60%, 25% 35%, 40% 35%, 55% 50%, 95% 50%, 95% 70%, 5% 70%);
}

.model3-silhouette,
.modely-silhouette {
  border-radius: 50% 50% 10% 10% / 30% 30% 10% 10%;
  background: rgba(255, 255, 255, 0.8);
  width: 70%;
  height: 50%;
}

.vehicle-card__badge {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  padding: var(--space-xs) var(--space-sm);
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-primary);
}

.badge--red {
  background: rgba(232, 33, 39, 0.2);
  color: var(--color-accent);
}

.badge--gold {
  background: rgba(245, 158, 11, 0.2);
  color: var(--color-warning);
}

.badge--blue {
  background: rgba(59, 130, 246, 0.2);
  color: var(--color-info);
}

.vehicle-card__content {
  padding: var(--space-lg);
}

.vehicle-card__name {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.vehicle-card__variants {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
}

.vehicle-card__button {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-weight: 500;
  font-size: 0.9375rem;
  transition: background var(--transition-base), border-color var(--transition-base);
}

.vehicle-card__button:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
}

/* ============================================
   REQUIREMENTS SECTION
   ============================================ */
.requirements {
  padding: var(--space-4xl) 0;
  background: var(--color-bg-secondary);
}

.requirements-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: var(--space-xl);
  margin-bottom: var(--space-3xl);
}

.requirement-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
}

.requirement-card__header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

.requirement-card__icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-subtle);
  border-radius: var(--radius-md);
  color: var(--color-accent);
}

.requirement-card__title {
  font-size: 1.25rem;
  font-weight: 600;
}

.requirement-card__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.requirement-card__list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
}

.requirement-card__list li strong {
  color: var(--color-text-primary);
}

.check-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(34, 197, 94, 0.15);
  color: var(--color-success);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
}

.warning-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(245, 158, 11, 0.15);
  color: var(--color-warning);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
}

/* Folder Structure Visual */
.folder-structure {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  max-width: 400px;
  margin: 0 auto;
}

.folder-structure__title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--space-lg);
  text-align: center;
  color: var(--color-text-secondary);
}

.folder-structure__tree {
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 0.875rem;
}

.folder-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) 0;
}

.folder-item--root svg {
  color: var(--color-warning);
}

.folder-item--wraps {
  padding-left: var(--space-xl);
}

.folder-item--wraps svg {
  color: var(--color-accent);
}

.folder-item--file {
  padding-left: calc(var(--space-xl) * 2);
  color: var(--color-text-secondary);
}

.folder-item--file svg {
  color: var(--color-text-muted);
}

/* ============================================
   TROUBLESHOOTING SECTION
   ============================================ */
.troubleshooting {
  padding: var(--space-4xl) 0;
}

.accordion {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.accordion-item {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-base);
}

.accordion-item:hover {
  border-color: var(--color-border-hover);
}

.accordion-item.active {
  border-color: var(--color-accent);
}

.accordion-header {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg);
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text-primary);
  text-align: left;
  transition: color var(--transition-base);
}

.accordion-header:hover {
  color: var(--color-accent);
}

.accordion-icon {
  flex-shrink: 0;
  color: var(--color-text-muted);
  transition: transform var(--transition-base);
}

.accordion-item.active .accordion-icon {
  transform: rotate(180deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow), padding var(--transition-slow);
}

.accordion-item.active .accordion-content {
  max-height: 200px;
}

.accordion-content p {
  padding: 0 var(--space-lg) var(--space-lg);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  padding: var(--space-3xl) 0 var(--space-xl);
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
}

.footer__content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-xl);
}

.footer__text {
  font-size: 1.125rem;
  font-weight: 500;
}

.footer__links {
  display: flex;
  gap: var(--space-xl);
}

.footer__links a {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  transition: color var(--transition-base);
}

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

.footer__bottom {
  text-align: center;
}

.footer__bottom p {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* ============================================
   TOAST NOTIFICATION
   ============================================ */
.toast {
  position: fixed;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  background: var(--color-success);
  color: white;
  border-radius: var(--radius-full);
  font-weight: 500;
  font-size: 0.9375rem;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transition: transform var(--transition-base), opacity var(--transition-base), visibility var(--transition-base);
  z-index: 1000;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
  visibility: visible;
}

/* ============================================
   HELP MODAL (Installation Guide)
   ============================================ */
.help-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
  padding: var(--space-lg);
}

.help-modal-overlay.show {
  opacity: 1;
  visibility: visible;
}

.help-modal {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 700px;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.95) translateY(10px);
  transition: transform var(--transition-base);
}

.help-modal-overlay.show .help-modal {
  transform: scale(1) translateY(0);
}

.help-modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg) var(--space-xl);
  border-bottom: 1px solid var(--color-border);
}

.help-modal__title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text-primary);
}

.help-modal__close {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.help-modal__close:hover {
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
}

.help-modal__content {
  padding: var(--space-xl);
}

.help-modal__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.help-step {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-lg);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.help-step__number {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-accent);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 700;
  color: white;
}

.help-step__info {
  flex: 1;
  min-width: 0;
}

.help-step__title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-xs);
}

.help-step__desc {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.help-step__desc strong {
  color: var(--color-text-primary);
  font-weight: 600;
}

.help-warning {
  color: #f59e0b;
  font-weight: 500;
}

.help-code {
  display: inline-block;
  padding: 2px 8px;
  background: var(--color-accent);
  color: white;
  border-radius: var(--radius-sm);
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 0.8125rem;
  font-weight: 600;
}

.help-modal__btn {
  display: block;
  width: calc(100% - var(--space-xl) * 2);
  margin: 0 var(--space-xl) var(--space-xl);
  padding: var(--space-md);
  background: var(--gradient-accent);
  border: none;
  border-radius: var(--radius-full);
  color: white;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.help-modal__btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

/* Help Modal Responsive */
@media (max-width: 600px) {
  .help-modal__grid {
    grid-template-columns: 1fr;
  }

  .help-modal__header {
    padding: var(--space-md) var(--space-lg);
  }

  .help-modal__content {
    padding: var(--space-lg);
  }

  .help-modal__btn {
    width: calc(100% - var(--space-lg) * 2);
    margin: 0 var(--space-lg) var(--space-lg);
  }
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes bounce {

  0%,
  20%,
  50%,
  80%,
  100% {
    transform: translateY(0);
  }

  40% {
    transform: translateY(6px);
  }

  60% {
    transform: translateY(3px);
  }
}

@keyframes scroll {
  0% {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }

  100% {
    opacity: 0;
    transform: translateX(-50%) translateY(12px);
  }
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
  .hero {
    padding: var(--space-2xl) var(--space-md);
  }

  .hero__title {
    font-size: 2.5rem;
  }

  .steps-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin: 0 auto;
  }

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

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

  .footer__links {
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
  }

  .section-subtitle {
    margin-bottom: var(--space-2xl);
  }
}

@media (max-width: 480px) {
  :root {
    --space-lg: 1rem;
    --space-xl: 1.5rem;
    --space-2xl: 2rem;
    --space-3xl: 2.5rem;
    --space-4xl: 3rem;
  }

  .hero__title {
    font-size: 2rem;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .requirement-card {
    padding: var(--space-lg);
  }

  .folder-item--wraps {
    padding-left: var(--space-lg);
  }

  .folder-item--file {
    padding-left: calc(var(--space-lg) * 2);
  }
}

/* ============================================
   WRAP EDITOR SECTION
   ============================================ */
.wrap-editor {
  padding: var(--space-4xl) 0;
  background: linear-gradient(180deg, var(--color-bg-secondary) 0%, var(--color-bg-primary) 100%);
  min-height: 100vh;
}

.editor-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.editor-layout {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: var(--space-xl);
  align-items: start;
}

/* Editor Controls Panel */
.editor-controls {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  position: sticky;
  top: var(--space-xl);
}

.control-group {
  margin-bottom: var(--space-xl);
}

.control-group:last-of-type {
  margin-bottom: var(--space-lg);
}

.control-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-md);
}

/* Vehicle Selector Tabs */
.vehicle-selector {
  display: flex;
  gap: var(--space-xs);
  background: var(--color-bg-tertiary);
  padding: 4px;
  border-radius: var(--radius-md);
}

.vehicle-tab {
  flex: 1;
  padding: var(--space-sm) var(--space-md);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: transparent;
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
}

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

.vehicle-tab.active {
  background: var(--color-accent);
  color: white;
}

/* Upload Zone */
.upload-zone {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-2xl);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-base);
}

.upload-zone:hover,
.upload-zone.dragover {
  border-color: var(--color-accent);
  background: var(--color-accent-subtle);
}

.upload-zone__icon {
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
  transition: color var(--transition-base);
}

.upload-zone:hover .upload-zone__icon {
  color: var(--color-accent);
}

.upload-zone__text {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text-primary);
  margin-bottom: var(--space-xs);
}

.upload-zone__subtext {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
}

.upload-zone__hint {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* Uploaded File Preview */
.uploaded-file {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-top: var(--space-md);
}

.uploaded-file__preview {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--color-bg-card);
}

.uploaded-file__preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.uploaded-file__info {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
}

.uploaded-file__name {
  font-size: 0.875rem;
  color: var(--color-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 180px;
}

.uploaded-file__remove {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
}

.uploaded-file__remove:hover {
  background: rgba(220, 38, 38, 0.1);
  color: #dc2626;
}

/* Slider Controls */
.slider-control {
  margin-bottom: var(--space-md);
}

.slider-control:last-child {
  margin-bottom: 0;
}

.slider-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-sm);
}

.slider-header span:first-child {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.slider-value {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent);
  font-family: 'SF Mono', 'Fira Code', monospace;
}

.slider {
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--color-bg-tertiary);
  appearance: none;
  cursor: pointer;
}

.slider::-webkit-slider-thumb {
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-accent);
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.slider::-webkit-slider-thumb:hover {
  transform: scale(1.1);
  box-shadow: 0 0 10px rgba(10, 132, 255, 0.4);
}

.slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border: none;
  border-radius: 50%;
  background: var(--color-accent);
  cursor: pointer;
}

/* Select Control */
.select-control {
  width: 100%;
  padding: var(--space-md);
  font-size: 0.9375rem;
  color: var(--color-text-primary);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: border-color var(--transition-base);
}

.select-control:hover,
.select-control:focus {
  border-color: var(--color-accent);
  outline: none;
}

.select-control option {
  background: var(--color-bg-card);
  color: var(--color-text-primary);
}

/* Action Buttons */
.editor-actions {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
}

.btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.btn--primary {
  background: var(--gradient-accent);
  color: white;
}

.btn--primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

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

.btn--secondary {
  background: var(--color-bg-tertiary);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

.btn--secondary:hover {
  border-color: var(--color-text-muted);
  color: var(--color-text-primary);
}

/* Editor Preview */
.editor-preview {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

/* Preview Tabs */
.preview-tabs {
  display: flex;
  border-bottom: 1px solid var(--color-border);
}

.preview-tab {
  flex: 1;
  padding: var(--space-md);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
}

.preview-tab:hover {
  color: var(--color-text-primary);
  background: var(--color-bg-tertiary);
}

.preview-tab.active {
  color: var(--color-accent);
  background: var(--color-bg-tertiary);
  border-bottom: 2px solid var(--color-accent);
}

/* 3D Preview */
.preview-3d {
  position: relative;
}

.preview-3d.hidden {
  display: none;
}

#threeDCanvas {
  width: 100%;
  min-height: 500px;
  aspect-ratio: 1;
  background: linear-gradient(135deg, #f5f5f7 0%, #e5e5e7 100%);
}

#threeDCanvas canvas {
  width: 100% !important;
  height: 100% !important;
}

.preview-3d__controls {
  position: absolute;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  padding: 6px 12px;
  background: rgba(0, 0, 0, 0.7);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

.preview-3d__controls p {
  margin: 0;
}

.preview-placeholder__hint {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: var(--space-sm);
}

/* ============================================
   MODE SELECTOR
   ============================================ */

.mode-selector {
  display: flex;
  gap: var(--space-xs);
  background: var(--color-bg-tertiary);
  padding: 4px;
  border-radius: var(--radius-md);
}

.mode-btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: var(--space-sm);
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  font-size: 0.75rem;
  cursor: pointer;
  transition: all var(--transition-base);
}

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

.mode-btn.active {
  background: var(--color-accent);
  color: white;
}

.mode-btn svg {
  width: 20px;
  height: 20px;
}

/* Hidden upload modes */
.upload-mode.hidden {
  display: none !important;
}

.control-group.hidden {
  display: none !important;
}

/* ============================================
   PARTS SELECTION MODE
   ============================================ */

.control-hint {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
}

.parts-selector {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xs);
  margin-bottom: var(--space-md);
}

.part-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-bg-tertiary);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--transition-base);
}

.part-btn:hover {
  border-color: var(--color-text-secondary);
  color: var(--color-text-primary);
}

.part-btn.selected {
  border-color: var(--color-accent);
  background: rgba(10, 132, 255, 0.1);
  color: var(--color-accent);
}

.part-btn.has-image {
  border-color: #22c55e;
  background: rgba(34, 197, 94, 0.1);
}

.part-btn.has-image .part-btn__indicator {
  background: #22c55e;
}

.part-btn__indicator {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-border);
  transition: background var(--transition-base);
}

.part-btn.selected .part-btn__indicator {
  background: var(--color-accent);
}

.parts-upload {
  margin-bottom: var(--space-md);
}

.parts-upload__hint {
  text-align: center;
  padding: var(--space-md);
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.upload-zone.small {
  padding: var(--space-md);
}

.upload-zone.small .upload-zone__content {
  gap: var(--space-xs);
}

.upload-zone.small .upload-zone__text {
  font-size: 0.85rem;
}

.parts-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.parts-list__item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-md);
}

.parts-list__preview {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  object-fit: cover;
}

.parts-list__info {
  flex: 1;
}

.parts-list__parts {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
}

.parts-list__remove {
  padding: 4px 8px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  font-size: 0.75rem;
  cursor: pointer;
}

.parts-list__remove:hover {
  border-color: #dc2626;
  color: #dc2626;
}

/* ============================================
   PARTS GRID (New Individual Parts Mode)
   ============================================ */

.parts-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.part-upload-card {
  background: var(--color-bg-tertiary);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-base);
}

.part-upload-card:hover {
  border-color: var(--color-text-secondary);
}

.part-upload-card.selected {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px rgba(10, 132, 255, 0.2);
}

.part-upload-card.has-image {
  border-color: #22c55e;
}

.part-upload-card.has-image.selected {
  border-color: var(--color-accent);
}

.part-upload-card__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 10px;
  background: rgba(0, 0, 0, 0.05);
  border-bottom: 1px solid var(--color-border);
}

.part-upload-card__name {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-secondary);
}

.part-upload-card.has-image .part-upload-card__name {
  color: #22c55e;
}

.part-upload-card.selected .part-upload-card__name {
  color: var(--color-accent);
}

.part-upload-card__remove {
  width: 20px;
  height: 20px;
  background: rgba(220, 38, 38, 0.8);
  border: none;
  border-radius: 50%;
  color: white;
  font-size: 14px;
  line-height: 1;
  cursor: pointer;
  transition: all var(--transition-base);
}

.part-upload-card__remove:hover {
  background: #dc2626;
  transform: scale(1.1);
}

.part-upload-card__remove.hidden {
  display: none;
}

.part-upload-card__zone {
  position: relative;
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  overflow: hidden;
}

.part-upload-card__preview {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.part-upload-card.has-image .part-upload-card__preview {
  opacity: 1;
}

.part-upload-card__hint {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  z-index: 1;
  padding: 4px 8px;
  background: rgba(255, 255, 255, 0.85);
  border-radius: var(--radius-sm);
}

.part-upload-card.has-image .part-upload-card__hint {
  position: absolute;
  bottom: 4px;
  right: 4px;
}

/* Selected Part Info */
.selected-part-info {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: rgba(10, 132, 255, 0.1);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-md);
  margin-top: var(--space-sm);
}

.selected-part-info[hidden] {
  display: none;
}

.selected-part-info__label {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
}

.selected-part-info__name {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-accent);
}

.selected-part-info__hint {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-left: auto;
}

.preview-container {
  position: relative;
  aspect-ratio: 1;
  background:
    linear-gradient(45deg, #e5e5e7 25%, transparent 25%),
    linear-gradient(-45deg, #e5e5e7 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #e5e5e7 75%),
    linear-gradient(-45deg, transparent 75%, #e5e5e7 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
  background-color: #f5f5f7;
}

.preview-container canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.preview-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-tertiary);
}

.preview-placeholder.hidden,
.preview-placeholder[hidden] {
  display: none !important;
}

.preview-placeholder__icon {
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.preview-placeholder p {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
}

.preview-info {
  display: flex;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-bg-tertiary);
  border-top: 1px solid var(--color-border);
}

.preview-info__label,
.preview-info__size {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

/* Editor Responsive */
@media (max-width: 1024px) {
  .editor-layout {
    grid-template-columns: 1fr;
  }

  .editor-controls {
    position: static;
    order: 2;
  }

  .editor-preview {
    order: 1;
  }
}

@media (max-width: 768px) {
  .vehicle-selector {
    flex-direction: column;
  }

  .vehicle-tab {
    text-align: center;
  }

  .editor-actions {
    flex-direction: column;
  }

  .preview-info {
    flex-direction: column;
    gap: var(--space-xs);
    text-align: center;
  }
}

/* ============================================
   SAMPLES GALLERY (Dropdown with Scrollable Grid)
   ============================================ */

/* Dropdown Container */
.samples-dropdown {
  position: relative;
}

/* Toggle Button */
.samples-dropdown__toggle {
  width: 100%;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all var(--transition-base);
}

.samples-dropdown__toggle:hover {
  border-color: var(--color-text-muted);
  color: var(--color-text-primary);
}

.samples-dropdown__toggle.active {
  border-color: var(--color-accent);
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
}

.samples-dropdown__toggle svg:first-child {
  color: var(--color-accent);
}

.samples-dropdown__toggle span:first-of-type {
  flex: 1;
  text-align: left;
}

.samples-count {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  background: var(--color-bg-card);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.samples-dropdown__caret {
  transition: transform var(--transition-base);
}

.samples-dropdown__toggle.active .samples-dropdown__caret {
  transform: rotate(180deg);
}

/* Dropdown Content */
.samples-dropdown__content {
  display: none;
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-accent);
  border-top: none;
  border-bottom-left-radius: var(--radius-md);
  border-bottom-right-radius: var(--radius-md);
  overflow: hidden;
}

.samples-dropdown__content.expanded {
  display: block;
}

/* Scrollable Grid */
.samples-scroll-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  padding: 8px;
  max-height: 280px;
  overflow-y: auto;
  overflow-x: hidden;
}

/* Custom scrollbar for samples */
.samples-scroll-grid::-webkit-scrollbar {
  width: 6px;
}

.samples-scroll-grid::-webkit-scrollbar-track {
  background: var(--color-bg-card);
  border-radius: 3px;
}

.samples-scroll-grid::-webkit-scrollbar-thumb {
  background: var(--color-text-muted);
  border-radius: 3px;
}

.samples-scroll-grid::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-secondary);
}

/* Empty state */
.samples-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: var(--space-lg);
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

/* Legacy grid (for backwards compat) */
.samples-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-sm);
}

/* Sample Card */
.sample-card {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  border: 2px solid var(--color-border);
  background: var(--color-bg-card);
  transition: all var(--transition-base);
}

.sample-card:hover {
  border-color: var(--color-accent);
  transform: scale(1.02);
}

.sample-card.selected {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px rgba(10, 132, 255, 0.3), var(--shadow-glow);
}

.sample-card__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-base);
}

.sample-card:hover .sample-card__img {
  transform: scale(1.05);
}

.sample-card__name {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 6px 4px;
  background: linear-gradient(to top, rgba(255, 255, 255, 0.95) 0%, rgba(255, 255, 255, 0.7) 80%, transparent 100%);
  font-size: 0.7rem;
  font-weight: 600;
  text-align: center;
  color: var(--color-text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sample-card:hover .sample-card__name,
.sample-card.selected .sample-card__name {
  color: white;
  background: linear-gradient(to top, rgba(10, 132, 255, 0.9) 0%, rgba(10, 132, 255, 0.4) 80%, transparent 100%);
}

/* ============================================
   LAYERS PANEL
   ============================================ */

.layers-panel {
  background: var(--color-bg-tertiary);
  border-top: 1px solid var(--color-border);
  max-height: 300px;
  display: flex;
  flex-direction: column;
}

.layers-panel[hidden] {
  display: none !important;
}

.layers-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-border);
}

.layers-panel__title {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  margin: 0;
}

.layers-panel__title svg {
  color: var(--color-accent);
}

.layers-panel__add {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 12px;
  background: var(--color-accent);
  border: none;
  border-radius: var(--radius-sm);
  color: white;
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
}

.layers-panel__add:hover {
  background: var(--color-accent-hover);
  transform: scale(1.05);
}

.layers-list {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-sm);
}

.layers-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl);
  text-align: center;
}

.layers-empty p {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin: 0 0 4px 0;
}

.layers-empty span {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.layers-empty[hidden] {
  display: none;
}

/* Individual Layer Item */
.layer-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-xs);
  cursor: pointer;
  transition: all var(--transition-base);
}

.layer-item:hover {
  border-color: var(--color-text-muted);
}

.layer-item.selected {
  border-color: var(--color-accent);
  background: rgba(10, 132, 255, 0.1);
}

.layer-item.dragging {
  opacity: 0.5;
  transform: scale(0.98);
}

.layer-item__drag {
  cursor: grab;
  color: var(--color-text-muted);
  padding: 4px;
}

.layer-item__drag:active {
  cursor: grabbing;
}

.layer-item__visibility {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
}

.layer-item__visibility:hover {
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
}

.layer-item__visibility.hidden-layer {
  color: var(--color-text-muted);
  opacity: 0.5;
}

.layer-item__thumbnail {
  width: 32px;
  height: 32px;
  border-radius: 4px;
  object-fit: cover;
  background: var(--color-bg-tertiary);
}

.layer-item__info {
  flex: 1;
  min-width: 0;
}

.layer-item__name {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.layer-item__opacity {
  font-size: 0.7rem;
  color: var(--color-text-muted);
}

.layer-item__delete {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  border-radius: var(--radius-sm);
  opacity: 0;
  transition: all var(--transition-base);
}

.layer-item:hover .layer-item__delete {
  opacity: 1;
}

.layer-item__delete:hover {
  background: rgba(220, 38, 38, 0.1);
  color: #dc2626;
}

/* Layers mode upload toggle */
.layers-upload-mode {
  display: none;
}

.layers-upload-mode.active {
  display: block;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.hidden {
  display: none !important;
}

/* ============================================
   SINGLE PAGE APP MODE
   ============================================ */

body.app-mode {
  height: 100vh;
  height: 100dvh;
  min-height: -webkit-fill-available;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  margin: 0;
  padding: 0;
}

/* App Header (Top Bar) */
.app-header {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  padding: var(--space-sm) var(--space-lg);
  padding-top: max(var(--space-sm), env(safe-area-inset-top));
  background: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
  min-height: 56px;
  z-index: 200;
  position: relative;
}

.app-header__brand {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.app-header__logo {
  color: var(--color-text-primary);
}

.app-header__logo-img {
  height: 24px;
  width: auto;
  filter: none;
}

.app-header__logo-accent {
  color: var(--color-accent);
}

.app-header__controls {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex: 1;
}

.app-header__select-group {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.app-header__label {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.app-header__select {
  padding: 6px 12px;
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  font-size: 0.875rem;
  cursor: pointer;
  min-width: 140px;
}

.app-header__select:hover {
  border-color: var(--color-border-hover);
}

.app-header__select:focus {
  outline: none;
  border-color: var(--color-accent);
}

.app-header__actions {
  display: flex;
  gap: var(--space-sm);
}

.app-header__btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-base);
}

.app-header__btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.app-header__btn--download {
  width: auto;
  height: auto;
  flex-direction: row;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: white;
  font-weight: 500;
  font-size: 0.8rem;
  white-space: nowrap;
}

.app-header__btn--download:hover:not(:disabled) {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: white;
}

.app-header__btn--download:disabled {
  opacity: 0.5;
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: white;
  cursor: not-allowed;
}

/* Desktop-only elements (hidden on mobile) */
.desktop-only {
  display: flex;
}

/* App Main Layout */
.app-main {
  flex: 1;
  display: grid;
  grid-template-columns: 280px 1fr 280px;
  overflow: hidden;
}

/* App Sidebar */
.app-sidebar {
  background: var(--color-bg-secondary);
  border-right: 1px solid var(--color-border);
  overflow-y: auto;
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.sidebar-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.sidebar-label {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Compact Upload Zone */
.upload-zone-compact {
  padding: var(--space-md);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
}

.upload-zone-compact:hover {
  border-color: var(--color-accent);
  background: var(--color-accent-subtle);
}

.upload-zone-compact__content {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

.upload-zone-compact__content svg {
  color: var(--color-accent);
}

.uploaded-file-compact {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-sm);
}

.uploaded-file-compact[hidden] {
  display: none !important;
}

.uploaded-file-compact img {
  width: 32px;
  height: 32px;
  object-fit: cover;
  border-radius: 4px;
}

.uploaded-file-compact span {
  flex: 1;
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.uploaded-file-compact .remove-btn {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(220, 38, 38, 0.2);
  border: none;
  border-radius: 50%;
  color: #dc2626;
  font-size: 14px;
  cursor: pointer;
}

.uploaded-file-compact .remove-btn:hover {
  background: rgba(220, 38, 38, 0.4);
}

/* Compact Mode Selector */
.mode-selector-compact {
  display: flex;
  gap: var(--space-xs);
  background: var(--color-bg-tertiary);
  padding: 4px;
  border-radius: var(--radius-sm);
}

.mode-btn-compact {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  font-size: 0.75rem;
  cursor: pointer;
  transition: all var(--transition-base);
}

.mode-btn-compact:hover {
  background: var(--color-bg-card);
  color: var(--color-text-primary);
}

.mode-btn-compact.active {
  background: var(--color-accent);
  color: white;
}

/* Compact Sliders */
.slider-compact {
  display: grid;
  grid-template-columns: 70px 1fr 40px;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

.slider-compact input[type="range"] {
  width: 100%;
  height: 4px;
  background: var(--color-bg-tertiary);
  border-radius: 2px;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
}

.slider-compact input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  background: var(--color-accent);
  border-radius: 50%;
  cursor: pointer;
}

.slider-compact span:last-child {
  text-align: right;
  color: var(--color-text-muted);
  font-size: 0.7rem;
}

/* Compact Select */
.select-compact {
  width: 100%;
  padding: 8px 12px;
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  font-size: 0.8rem;
  cursor: pointer;
}

.select-compact:focus {
  outline: none;
  border-color: var(--color-accent);
}

/* Compact Parts Grid */
.parts-grid-compact {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xs);
}

.part-card {
  position: relative;
  aspect-ratio: 1;
  background: var(--color-bg-tertiary);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  overflow: hidden;
  transition: all var(--transition-base);
}

.part-card:hover {
  border-color: var(--color-text-muted);
}

.part-card.has-image {
  border-color: var(--color-success);
}

.part-card__preview {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
}

.part-card__label {
  position: absolute;
  bottom: 4px;
  left: 0;
  right: 0;
  text-align: center;
  font-size: 0.65rem;
  color: var(--color-text-secondary);
  background: rgba(255, 255, 255, 0.85);
  padding: 2px;
}

.part-card__remove {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 16px;
  height: 16px;
  background: rgba(220, 38, 38, 0.8);
  border: none;
  border-radius: 50%;
  color: white;
  font-size: 12px;
  line-height: 1;
  cursor: pointer;
}

/* Sidebar Actions */
.sidebar-actions {
  display: flex;
  gap: var(--space-sm);
  margin-top: auto;
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
}

.btn-compact {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
}

.btn-secondary {
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
}

.btn-secondary:hover {
  border-color: var(--color-text-muted);
  color: var(--color-text-primary);
}

.btn-primary {
  background: var(--color-accent);
  border: none;
  color: white;
  font-weight: 600;
  font-size: 0.9rem;
  padding: var(--space-md) var(--space-lg);
  box-shadow: 0 4px 12px rgba(10, 132, 255, 0.3);
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-accent-hover);
  box-shadow: 0 6px 16px rgba(10, 132, 255, 0.4);
  transform: translateY(-1px);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  box-shadow: none;
}

/* Canvas Area */
.app-canvas-area {
  display: flex;
  flex-direction: column;
  background: var(--color-bg-primary);
  overflow: hidden;
}

.canvas-title-area {
  text-align: center;
  padding: var(--space-sm) var(--space-md);
  flex-shrink: 0;
}

.canvas-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-accent);
}

.mobile-vehicle-select {
  display: none;
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-sm);
  color: var(--color-accent);
  font-size: 0.9rem;
  font-weight: 600;
  padding: var(--space-xs) var(--space-sm);
  cursor: pointer;
}

.canvas-description {
  text-align: center;
  padding: var(--space-sm) var(--space-md);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  flex-shrink: 0;
}

/* Mobile Download Button - Hidden on desktop */
.mobile-download-btn {
  display: none;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  width: calc(100% - var(--space-lg) * 2);
  margin: var(--space-sm) var(--space-lg);
  padding: var(--space-md) var(--space-lg);
  background: var(--color-accent);
  border: none;
  border-radius: var(--radius-md);
  color: white;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(10, 132, 255, 0.3);
  transition: all var(--transition-base);
}

.mobile-download-btn:hover:not(:disabled) {
  background: var(--color-accent-hover);
  box-shadow: 0 6px 16px rgba(10, 132, 255, 0.4);
}

.mobile-download-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  box-shadow: none;
}

.canvas-container {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  min-height: 0;
  padding: var(--space-md);
  background:
    linear-gradient(45deg, #e5e5e7 25%, transparent 25%),
    linear-gradient(-45deg, #e5e5e7 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #e5e5e7 75%),
    linear-gradient(-45deg, transparent 75%, #e5e5e7 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
  background-color: #f5f5f7;
}

.canvas-container canvas {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
}

.canvas-container .preview-placeholder {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.canvas-container .preview-placeholder.hidden {
  display: none;
}

.canvas-container .preview-placeholder svg {
  color: var(--color-text-muted);
}

/* Compact Layers Panel */
.layers-panel-compact {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  max-height: 180px;
  display: flex;
  flex-direction: column;
}

.layers-panel-compact__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-border);
}

.layers-panel-compact__title {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
}

.layers-panel-compact__title svg {
  color: var(--color-accent);
}

.layers-panel-compact__add {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  background: var(--color-accent);
  border: none;
  border-radius: var(--radius-sm);
  color: white;
  font-size: 0.7rem;
  font-weight: 600;
  cursor: pointer;
}

.layers-panel-compact__add:hover {
  background: var(--color-accent-hover);
}

.layers-list-compact {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-sm);
}

.layers-empty-compact {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.8rem;
  gap: 4px;
}

/* App Footer - Hidden for iframe embed */
.app-footer {
  display: none;
}

/* Right Panel (Layers) */
.app-right-panel {
  background: var(--color-bg-secondary);
  border-left: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.layers-panel-right__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.layers-panel-right__title {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
}

.layers-panel-right__title svg {
  color: var(--color-accent);
}

.layers-panel-right__add {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  background: var(--color-accent);
  border: none;
  border-radius: var(--radius-sm);
  color: white;
  font-size: 0.7rem;
  font-weight: 600;
  cursor: pointer;
}

.layers-panel-right__add:hover {
  background: var(--color-accent-hover);
}

.layers-list-right {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-sm);
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.layers-empty-right {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl);
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.8rem;
  gap: 4px;
}

/* Responsive */

/* Mobile toggle buttons - hidden by default */
.mobile-toggle {
  display: none;
}

/* Mobile overlay */
.mobile-overlay {
  position: fixed;
  inset: 0;
  top: 56px;
  background: rgba(0, 0, 0, 0.25);
  z-index: 99;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

.mobile-overlay.show {
  opacity: 1;
  visibility: visible;
}

@media (max-width: 1100px) {
  .app-main {
    grid-template-columns: 240px 1fr 240px;
  }
}

@media (max-width: 900px) {

  /* Show mobile toggle buttons */
  .mobile-toggle {
    display: flex;
  }

  .app-main {
    grid-template-columns: 1fr;
  }

  .app-sidebar,
  .app-right-panel {
    position: fixed;
    top: 56px;
    bottom: 0;
    width: 280px;
    z-index: 100;
    transition: transform var(--transition-base);
    box-shadow: var(--shadow-lg);
  }

  .app-sidebar {
    left: 0;
    transform: translateX(-100%);
  }

  .app-right-panel {
    right: 0;
    transform: translateX(100%);
  }

  .app-sidebar.open {
    transform: translateX(0);
  }

  .app-right-panel.open {
    transform: translateX(0);
  }

  /* Adjust canvas area for mobile */
  .app-canvas-area {
    padding: var(--space-sm);
  }

  .canvas-container {
    max-height: 60vh;
  }

  #wrapCanvas {
    max-height: 55vh;
  }

  .canvas-title {
    font-size: 0.875rem;
    padding: var(--space-xs) var(--space-sm);
  }

  .canvas-description {
    font-size: 0.75rem;
  }

  /* Show mobile download button */
  .mobile-download-btn {
    display: flex;
  }

  /* Hide desktop-only elements on mobile */
  .desktop-only {
    display: none !important;
  }
}

@media (max-width: 480px) {

  /* Header adjustments for small screens */
  .app-header {
    padding: var(--space-xs) var(--space-sm);
  }

  .app-header__select-group {
    display: none;
  }

  /* Show mobile vehicle selector in canvas area */
  .canvas-title {
    display: none;
  }

  .mobile-vehicle-select {
    display: inline-block;
  }

  .app-header__select {
    font-size: 0.75rem;
    padding: var(--space-xs) var(--space-sm);
  }

  /* Smaller panels on very small screens */
  .app-sidebar,
  .app-right-panel {
    width: 260px;
  }

  /* Make sliders more touch-friendly */
  .slider-compact input[type="range"] {
    height: 24px;
  }

  .slider-compact input[type="range"]::-webkit-slider-thumb {
    width: 24px;
    height: 24px;
  }

  /* Larger touch targets */
  .btn-compact {
    padding: var(--space-md);
    min-height: 44px;
  }

  .mode-btn-compact {
    min-height: 44px;
  }

  /* Canvas takes more space */
  .canvas-container {
    max-height: 50vh;
  }

  #wrapCanvas {
    max-height: 45vh;
  }
}