:root {
  --bg-primary: #0a0b0d;
  --bg-surface: #121418;
  --bg-surface-hover: #181b21;
  --border-color: #20242c;
  --text-main: #f0f2f5;
  --text-muted: #848c99;
  --accent: #d1d5db;
  --font-heading: 'Space Grotesk', -apple-system, sans-serif;
  --font-body: 'Inter', -apple-system, sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-body);
  line-height: 1.6;
}

.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(10, 11, 13, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 20px 48px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 2px;
}

.navbar nav a {
  color: var(--text-muted);
  text-decoration: none;
  margin-left: 28px;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  transition: color 0.2s ease;
}

.navbar nav a:hover {
  color: #fff;
}

.hero {
  padding: 140px 48px 100px;
  max-width: 960px;
  margin: 0 auto;
  text-align: center;
}

.eyebrow {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  letter-spacing: 4px;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(2.4rem, 5vw, 4.2rem);
  font-weight: 700;
  letter-spacing: -1px;
  line-height: 1.15;
  margin-bottom: 24px;
}

.subtitle {
  color: var(--text-muted);
  font-size: 1.15rem;
  max-width: 680px;
  margin: 0 auto 40px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
}

.btn {
  padding: 14px 28px;
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  letter-spacing: 1px;
  text-transform: uppercase;
  border-radius: 2px;
  transition: all 0.2s ease;
}

.btn-primary {
  background-color: #fff;
  color: var(--bg-primary);
}

.btn-primary:hover {
  background-color: #d1d5db;
}

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

.btn-secondary:hover {
  border-color: #555e6d;
}

.collection-section {
  padding: 80px 48px;
  max-width: 1280px;
  margin: 0 auto;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 40px;
  flex-wrap: wrap;
  gap: 20px;
}

.section-header h2 {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  letter-spacing: 1px;
}

.filters {
  display: flex;
  gap: 8px;
}

.filter-btn {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 8px 16px;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  cursor: pointer;
  border-radius: 2px;
  transition: all 0.2s ease;
}

.filter-btn.active, .filter-btn:hover {
  background-color: var(--bg-surface);
  color: #fff;
  border-color: #555e6d;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
}

.card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: #3b4250;
}

.image-wrapper {
  position: relative;
  width: 100%;
  height: 380px;
  overflow: hidden;
  background-color: #191c22;
}

.image-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.card:hover .image-wrapper img {
  transform: scale(1.04);
}

.tag {
  position: absolute;
  top: 14px;
  right: 14px;
  background-color: rgba(10, 11, 13, 0.8);
  border: 1px solid var(--border-color);
  font-size: 0.7rem;
  letter-spacing: 1.5px;
  padding: 4px 8px;
  border-radius: 2px;
}

.card-details {
  padding: 22px;
}

.card-title-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 8px;
}

.card-title-row h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
}

.card-title-row .price {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
}

.specs {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.materials-section {
  padding: 80px 48px;
  max-width: 1280px;
  margin: 0 auto;
  border-top: 1px solid var(--border-color);
}

.materials-section h2 {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  margin-bottom: 32px;
}

.materials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.mat-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 28px;
}

.mat-card h4 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  margin-bottom: 12px;
}

.mat-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.manifesto-section {
  padding: 100px 48px;
  border-top: 1px solid var(--border-color);
  background-color: #0d0f12;
}

.manifesto-inner {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
}

.manifesto-inner h2 {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  margin-bottom: 20px;
}

.manifesto-inner p {
  color: var(--text-muted);
  font-size: 1.1rem;
  line-height: 1.8;
}

footer {
  border-top: 1px solid var(--border-color);
  padding: 40px 48px;
}

.footer-content {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-brand {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: 1.5px;
}

@media (max-width: 768px) {
  .navbar, .hero, .collection-section, .materials-section, .manifesto-section, footer {
    padding-left: 20px;
    padding-right: 20px;
  }
}