/* ==========================================================================
   BRAINCELLS LIMITED - Main Stylesheet
   Blue Collar Noir / Industrial Skate
   Pass~Port Inspired Aesthetic
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties (Design Tokens)
   -------------------------------------------------------------------------- */
:root {
  /* Colors - The Inversion Layer */
  --asphalt: #1a1a1a;
  --bone: #f2f0e6;
  --rust: #a33b3b;
  --safety-orange: #ff4400;
  --frankton-grey: #3b4d61;
  --black: #000000;
  --white: #ffffff;

  /* Typography */
  --font-display: 'Space Mono', 'Courier New', monospace;
  --font-body: 'Courier Prime', 'Courier New', monospace;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4rem;
  --space-xxl: 8rem;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

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

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

body {
  font-family: var(--font-body);
  background-color: var(--asphalt);
  color: var(--bone);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Grain overlay effect */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9999;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  opacity: 0.03;
}

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

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

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

/* --------------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------------- */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

h1 {
  font-size: clamp(2rem, 8vw, 5rem);
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
}

h3 {
  font-size: clamp(1.2rem, 3vw, 1.8rem);
}

h4 {
  font-size: 1.2rem;
}

p {
  max-width: 65ch;
}

.text-rust {
  color: var(--rust);
}

.text-orange {
  color: var(--safety-orange);
}

.text-bone {
  color: var(--bone);
}

/* --------------------------------------------------------------------------
   Layout Components
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {

  .grid-4,
  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }
}

/* --------------------------------------------------------------------------
   Header / Navigation
   -------------------------------------------------------------------------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--black);
  border-bottom: 1px solid var(--bone);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.nav-logo span {
  color: var(--rust);
}

.nav-links {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
}

.nav-links a {
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: color var(--transition-fast);
}

.nav-links a:hover {
  color: var(--safety-orange);
}

.nav-cart {
  position: relative;
}

.nav-cart-count {
  position: absolute;
  top: -8px;
  right: -8px;
  background: var(--safety-orange);
  color: var(--black);
  font-size: 0.65rem;
  font-weight: 700;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Mobile menu */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--bone);
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
  }

  .nav-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--black);
    padding: var(--space-lg);
    border-bottom: 1px solid var(--bone);
  }
}

/* --------------------------------------------------------------------------
   Marquee
   -------------------------------------------------------------------------- */
.marquee {
  background: var(--rust);
  color: var(--bone);
  padding: var(--space-xs) 0;
  overflow: hidden;
  white-space: nowrap;
}

.marquee-content {
  display: inline-flex;
  animation: marquee 20s linear infinite;
}

.marquee-content span {
  font-family: var(--font-display);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding: 0 var(--space-xl);
}

@keyframes marquee {
  0% {
    transform: translateX(0);
  }

  100% {
    transform: translateX(-50%);
  }
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-xxl) var(--space-lg);
  position: relative;
}

.hero-logo {
  max-width: 400px;
  margin-bottom: var(--space-xl);
  filter: invert(1);
}

.hero h1 {
  margin-bottom: var(--space-md);
}

.hero-tagline {
  font-size: 1rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--rust);
  margin-bottom: var(--space-xl);
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: var(--space-md) var(--space-xl);
  border: 2px solid currentColor;
  transition: all var(--transition-fast);
}

.btn-primary {
  background: var(--safety-orange);
  color: var(--black);
  border-color: var(--safety-orange);
}

.btn-primary:hover {
  background: var(--black);
  color: var(--safety-orange);
}

.btn-outline {
  background: transparent;
  color: var(--bone);
  border-color: var(--bone);
}

.btn-outline:hover {
  background: var(--bone);
  color: var(--asphalt);
}

.btn-rust {
  background: var(--rust);
  color: var(--bone);
  border-color: var(--rust);
}

.btn-rust:hover {
  background: transparent;
  color: var(--rust);
}

/* Glitch effect on hover */
.btn-glitch {
  position: relative;
}

.btn-glitch:hover {
  animation: glitch 0.3s ease;
}

@keyframes glitch {
  0% {
    transform: translate(0);
  }

  20% {
    transform: translate(-2px, 2px);
  }

  40% {
    transform: translate(-2px, -2px);
  }

  60% {
    transform: translate(2px, 2px);
  }

  80% {
    transform: translate(2px, -2px);
  }

  100% {
    transform: translate(0);
  }
}

/* --------------------------------------------------------------------------
   Product Grid
   -------------------------------------------------------------------------- */
.products-section {
  padding: var(--space-xxl) 0;
}

.products-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--frankton-grey);
}

.products-tabs {
  display: flex;
  gap: var(--space-lg);
}

.products-tabs button {
  font-family: var(--font-display);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--frankton-grey);
  padding-bottom: var(--space-xs);
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
}

.products-tabs button:hover,
.products-tabs button.active {
  color: var(--bone);
  border-bottom-color: var(--safety-orange);
}

.product-card {
  background: var(--black);
  border: 1px solid var(--frankton-grey);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

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

.product-card-image {
  background: var(--bone);
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
  position: relative;
  overflow: hidden;
}

.product-card-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: transform var(--transition-normal);
}

.product-card:hover .product-card-image img {
  transform: scale(1.05);
}

/* Stock badge */
.product-badge {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  background: var(--safety-orange);
  color: var(--black);
  font-family: var(--font-display);
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: var(--space-xs) var(--space-sm);
}

.product-badge.sold-out {
  background: var(--rust);
  color: var(--bone);
}

.product-card-info {
  padding: var(--space-md);
}

.product-card-title {
  font-family: var(--font-display);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: var(--space-xs);
}

.product-card-price {
  color: var(--rust);
  font-family: var(--font-display);
  font-weight: 700;
}

/* --------------------------------------------------------------------------
   Product Detail
   -------------------------------------------------------------------------- */
.product-detail {
  padding: var(--space-xxl) 0;
}

.product-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
}

@media (max-width: 768px) {
  .product-detail-grid {
    grid-template-columns: 1fr;
  }
}

.product-gallery {
  background: var(--bone);
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl);
}

.product-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.product-price {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--rust);
}

.product-description {
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--bone);
  opacity: 0.8;
}

.product-specs {
  border: 1px solid var(--frankton-grey);
  padding: var(--space-md);
}

.product-specs dt {
  font-family: var(--font-display);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--frankton-grey);
}

.product-specs dd {
  margin-bottom: var(--space-sm);
}

/* Size selector */
.size-selector {
  display: flex;
  gap: var(--space-sm);
}

.size-btn {
  width: 48px;
  height: 48px;
  border: 1px solid var(--frankton-grey);
  font-family: var(--font-display);
  font-size: 0.8rem;
  color: var(--bone);
  transition: all var(--transition-fast);
}

.size-btn:hover,
.size-btn.active {
  border-color: var(--bone);
  background: var(--bone);
  color: var(--asphalt);
}

.size-btn.disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.site-footer {
  background: var(--black);
  border-top: 1px solid var(--frankton-grey);
  padding: var(--space-xl) 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-xl);
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.footer-brand h3 {
  margin-bottom: var(--space-md);
}

.footer-brand p {
  font-size: 0.85rem;
  color: var(--frankton-grey);
}

.footer-links h4 {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-md);
  color: var(--rust);
}

.footer-links ul {
  list-style: none;
}

.footer-links a {
  font-size: 0.85rem;
  color: var(--frankton-grey);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--bone);
}

.footer-bottom {
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--frankton-grey);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: var(--frankton-grey);
}

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

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

.mt-sm {
  margin-top: var(--space-sm);
}

.mt-md {
  margin-top: var(--space-md);
}

.mt-lg {
  margin-top: var(--space-lg);
}

.mt-xl {
  margin-top: var(--space-xl);
}

.mb-sm {
  margin-bottom: var(--space-sm);
}

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

.mb-lg {
  margin-bottom: var(--space-lg);
}

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