/* RopeFinder - Industrial Utilitarian Design System */

:root {
  /* Colors - Industrial Palette */
  --charcoal: #2a2d34;
  --steel-dark: #3d4451;
  --steel: #5a6270;
  --steel-light: #8b92a0;
  --concrete: #e8eaed;
  --off-white: #f5f6f8;
  --safety-orange: #ff6b35;
  --warning-yellow: #ffc729;
  --rope-tan: #d4a574;
  --climb-green: #2d9f5f;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 3rem;
  --space-xl: 5rem;

  /* Typography Scale */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.25rem;
  --text-xl: 1.5rem;
  --text-2xl: 2rem;
  --text-3xl: 3rem;
  --text-4xl: 4rem;

  /* Effects */
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.15);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.2);
}

/* Fonts */
@import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&family=IBM+Plex+Mono:wght@400;600&family=Source+Sans+3:wght@400;600;700&display=swap');

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

body {
  font-family: 'Source Sans 3', sans-serif;
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--charcoal);
  background: var(--off-white);
  overflow-x: hidden;
}

/* Rope Texture Background Pattern */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    repeating-linear-gradient(
      45deg,
      transparent,
      transparent 2px,
      rgba(42, 45, 52, 0.02) 2px,
      rgba(42, 45, 52, 0.02) 4px
    );
  pointer-events: none;
  z-index: -1;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Bebas Neue', sans-serif;
  letter-spacing: 0.05em;
  line-height: 1.1;
  font-weight: 400;
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }

.mono {
  font-family: 'IBM Plex Mono', monospace;
}

/* Header */
header {
  background: var(--charcoal);
  color: var(--off-white);
  padding: var(--space-sm) 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-md);
}

.header-content {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  color: var(--off-white);
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--safety-orange);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Bebas Neue', sans-serif;
  font-size: var(--text-xl);
  font-weight: bold;
  transform: rotate(-5deg);
  box-shadow: 0 2px 8px rgba(255, 107, 53, 0.3);
}

.logo h1 {
  font-size: var(--text-2xl);
  margin: 0;
}

nav ul {
  display: flex;
  gap: var(--space-md);
  list-style: none;
  align-items: center;
}

nav a {
  color: var(--concrete);
  text-decoration: none;
  font-weight: 600;
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: color 0.3s ease;
  position: relative;
}

nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--safety-orange);
  transition: width 0.3s ease;
}

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

nav a:hover::after {
  width: 100%;
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--steel-dark) 0%, var(--charcoal) 100%);
  color: var(--off-white);
  padding: var(--space-xl) var(--space-md);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 60%;
  height: 100%;
  background: repeating-linear-gradient(
    -45deg,
    transparent,
    transparent 20px,
    rgba(255, 255, 255, 0.03) 20px,
    rgba(255, 255, 255, 0.03) 40px
  );
  pointer-events: none;
}

.hero-content {
  max-width: 1400px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.hero-text h2 {
  font-size: var(--text-4xl);
  margin-bottom: var(--space-sm);
  animation: slideInLeft 0.8s ease-out;
}

.hero-text .subtitle {
  font-size: var(--text-lg);
  color: var(--steel-light);
  margin-bottom: var(--space-md);
  animation: slideInLeft 0.8s ease-out 0.2s both;
}

.hero-stats {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-lg);
  animation: slideInLeft 0.8s ease-out 0.4s both;
}

.stat-box {
  background: rgba(255, 255, 255, 0.05);
  border: 2px solid var(--steel);
  border-left: 4px solid var(--safety-orange);
  padding: var(--space-sm) var(--space-md);
  backdrop-filter: blur(10px);
}

.stat-number {
  font-family: 'IBM Plex Mono', monospace;
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--warning-yellow);
}

.stat-label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--steel-light);
}

.hero-image {
  position: relative;
  animation: slideInRight 0.8s ease-out 0.3s both;
}

.hero-image img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: var(--shadow-lg);
}

/* Container */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--space-lg) var(--space-md);
}

/* Section Headers */
.section-header {
  text-align: center;
  margin-bottom: var(--space-lg);
  position: relative;
}

.section-header::after {
  content: '';
  display: block;
  width: 100px;
  height: 4px;
  background: var(--safety-orange);
  margin: var(--space-sm) auto 0;
  transform: skewX(-20deg);
}

.section-header h2 {
  font-size: var(--text-3xl);
  color: var(--charcoal);
  margin-bottom: var(--space-xs);
}

.section-header p {
  color: var(--steel);
  font-size: var(--text-lg);
}

/* Interactive Selector */
.selector-container {
  background: white;
  border: 3px solid var(--charcoal);
  border-radius: 8px;
  padding: var(--space-lg);
  margin-bottom: var(--space-xl);
  box-shadow: var(--shadow-lg);
  position: relative;
}

.selector-container::before {
  content: 'ROPE SELECTOR';
  position: absolute;
  top: -12px;
  left: var(--space-md);
  background: var(--safety-orange);
  color: white;
  padding: 4px 16px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
}

.selector-filters {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.filter-group label {
  display: block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-xs);
  color: var(--charcoal);
}

.filter-group select,
.filter-group input {
  width: 100%;
  padding: var(--space-sm);
  border: 2px solid var(--steel-light);
  border-radius: 4px;
  font-family: 'Source Sans 3', sans-serif;
  font-size: var(--text-base);
  background: var(--off-white);
  transition: border-color 0.3s ease;
}

.filter-group select:focus,
.filter-group input:focus {
  outline: none;
  border-color: var(--safety-orange);
}

.btn-search {
  background: var(--safety-orange);
  color: white;
  border: none;
  padding: var(--space-sm) var(--space-lg);
  font-family: 'Bebas Neue', sans-serif;
  font-size: var(--text-lg);
  letter-spacing: 0.05em;
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.3s ease;
  box-shadow: 0 4px 0 #d4551f;
  position: relative;
  top: 0;
}

.btn-search:hover {
  background: #ff8359;
  top: 2px;
  box-shadow: 0 2px 0 #d4551f;
}

.btn-search:active {
  top: 4px;
  box-shadow: 0 0 0 #d4551f;
}

/* Category Grid */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.category-card {
  background: white;
  border: 3px solid var(--charcoal);
  border-radius: 8px;
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  cursor: pointer;
  position: relative;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 6px;
  height: 100%;
  background: var(--safety-orange);
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform 0.3s ease;
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.category-card:hover::before {
  transform: scaleY(1);
}

.category-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
}

.category-content {
  padding: var(--space-md);
}

.category-tag {
  display: inline-block;
  background: var(--charcoal);
  color: var(--warning-yellow);
  font-family: 'IBM Plex Mono', monospace;
  font-size: var(--text-xs);
  padding: 4px 12px;
  border-radius: 3px;
  margin-bottom: var(--space-sm);
  font-weight: 600;
  letter-spacing: 0.05em;
}

.category-card h3 {
  margin-bottom: var(--space-sm);
  color: var(--charcoal);
}

.category-card p {
  color: var(--steel);
  margin-bottom: var(--space-md);
}

.category-specs {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.spec-item {
  font-family: 'IBM Plex Mono', monospace;
  font-size: var(--text-xs);
}

.spec-label {
  color: var(--steel-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.spec-value {
  color: var(--charcoal);
  font-weight: 600;
}

.btn-view-category {
  display: inline-block;
  background: var(--charcoal);
  color: white;
  text-decoration: none;
  padding: var(--space-sm) var(--space-md);
  font-family: 'Bebas Neue', sans-serif;
  font-size: var(--text-base);
  letter-spacing: 0.05em;
  border-radius: 4px;
  transition: background 0.3s ease;
}

.btn-view-category:hover {
  background: var(--safety-orange);
}

/* Product Grid */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.product-card {
  background: white;
  border: 2px solid var(--concrete);
  border-radius: 8px;
  overflow: hidden;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  border-color: var(--safety-orange);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.product-image-container {
  width: 100%;
  height: 280px;
  background: var(--off-white);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.product-image {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: var(--space-sm);
}

.product-badge {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  background: var(--climb-green);
  color: white;
  font-family: 'IBM Plex Mono', monospace;
  font-size: var(--text-xs);
  padding: 4px 8px;
  border-radius: 3px;
  font-weight: 600;
}

.product-info {
  padding: var(--space-md);
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.product-title {
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: var(--space-sm);
  color: var(--charcoal);
  line-height: 1.3;
}

.product-specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xs);
  margin-bottom: var(--space-md);
  padding: var(--space-sm);
  background: var(--off-white);
  border-radius: 4px;
}

.product-spec {
  font-family: 'IBM Plex Mono', monospace;
  font-size: var(--text-xs);
}

.spec-key {
  color: var(--steel-light);
  font-weight: 400;
}

.spec-val {
  color: var(--charcoal);
  font-weight: 600;
}

.product-footer {
  margin-top: auto;
  border-top: 2px solid var(--concrete);
  padding: var(--space-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.btn-amazon {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  background: var(--safety-orange);
  color: white;
  text-decoration: none;
  padding: var(--space-sm) var(--space-md);
  font-family: 'Bebas Neue', sans-serif;
  font-size: var(--text-base);
  letter-spacing: 0.05em;
  border-radius: 4px;
  transition: all 0.3s ease;
  box-shadow: 0 2px 0 #d4551f;
}

.btn-amazon:hover {
  background: #ff8359;
  transform: translateY(-2px);
  box-shadow: 0 4px 0 #d4551f;
}

/* Trust Badges */
.trust-section {
  background: var(--charcoal);
  color: var(--off-white);
  padding: var(--space-lg) var(--space-md);
  margin-top: var(--space-xl);
}

.trust-grid {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
  text-align: center;
}

.trust-item {
  padding: var(--space-md);
}

.trust-icon {
  width: 60px;
  height: 60px;
  background: var(--safety-orange);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-md);
  font-size: var(--text-2xl);
}

.trust-item h4 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-xs);
  color: var(--warning-yellow);
}

.trust-item p {
  color: var(--steel-light);
}

/* Footer */
footer {
  background: var(--charcoal);
  color: var(--steel-light);
  padding: var(--space-lg) var(--space-md);
  border-top: 4px solid var(--safety-orange);
}

.footer-content {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-lg);
}

.footer-brand h3 {
  color: var(--off-white);
  margin-bottom: var(--space-sm);
}

.footer-links h4 {
  color: var(--off-white);
  font-size: var(--text-base);
  margin-bottom: var(--space-sm);
}

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

.footer-links a {
  color: var(--steel-light);
  text-decoration: none;
  font-size: var(--text-sm);
  line-height: 2;
  transition: color 0.3s ease;
}

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

.footer-bottom {
  max-width: 1400px;
  margin: var(--space-lg) auto 0;
  padding-top: var(--space-md);
  border-top: 1px solid var(--steel);
  text-align: center;
  font-size: var(--text-sm);
}

/* Animations */
@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive */
@media (max-width: 768px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .hero-text h2 {
    font-size: var(--text-3xl);
  }

  .hero-stats {
    flex-direction: column;
  }

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

  .footer-content {
    grid-template-columns: 1fr;
  }

  nav ul {
    flex-wrap: wrap;
    gap: var(--space-sm);
  }

  .selector-filters {
    grid-template-columns: 1fr;
  }
}

/* Filter Results */
.results-count {
  font-family: 'IBM Plex Mono', monospace;
  color: var(--steel);
  margin-bottom: var(--space-md);
  font-size: var(--text-sm);
}

.no-results {
  text-align: center;
  padding: var(--space-xl);
  color: var(--steel);
}

.no-results h3 {
  color: var(--charcoal);
  margin-bottom: var(--space-sm);
}

/* Loading State */
.loading {
  text-align: center;
  padding: var(--space-xl);
}

.spinner {
  border: 4px solid var(--concrete);
  border-top: 4px solid var(--safety-orange);
  border-radius: 50%;
  width: 50px;
  height: 50px;
  animation: spin 1s linear infinite;
  margin: 0 auto;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}