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

:root {
  --bg: #ffffff;
  --bg2: #f7f7f8;
  --text: #1a1a1a;
  --text2: #6b7280;
  --text3: #9ca3af;
  --border: #e5e5e5;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --heading: 'Inter', -apple-system, sans-serif;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* NAV */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 48px;
  height: 60px;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-family: var(--heading);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.35em;
  color: var(--text);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 28px;
}

.nav-links a {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text2);
  text-decoration: none;
  transition: color 0.15s;
}
.nav-links a:hover { color: var(--text); }

/* HERO */
.hero {
  padding: 140px 48px 80px;
  max-width: 1200px;
  margin: 0 auto;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

h1, h2, h3 { font-family: var(--heading); }

.hero-label {
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.4em;
  color: var(--text3);
  margin-bottom: 20px;
}

.hero h1 {
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: 20px;
}

.hero-desc {
  font-size: 0.95rem;
  color: var(--text2);
  line-height: 1.7;
  max-width: 420px;
  margin-bottom: 32px;
}

.hero-btn {
  display: inline-block;
  padding: 12px 28px;
  background: var(--text);
  color: var(--bg);
  font-family: var(--font);
  font-size: 0.8rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 4px;
  transition: opacity 0.15s;
}
.hero-btn:hover { opacity: 0.85; }

.hero-image img {
  width: 100%;
  display: block;
  border-radius: 6px;
}

/* SECTIONS */
.section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 48px;
}

.section-label {
  font-family: var(--heading);
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.35em;
  color: var(--text3);
  text-transform: uppercase;
  margin-bottom: 32px;
}

/* GALLERY — BUILD STORY */
.gallery-section {
  padding-bottom: 40px;
}

.gallery-headline {
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.08;
  margin-bottom: 12px;
}

.gallery-subtitle {
  font-size: 0.95rem;
  color: var(--text2);
  line-height: 1.6;
  margin-bottom: 48px;
  max-width: 440px;
}

.build-story {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.build-story-row {
  display: grid;
  gap: 16px;
}

.build-story-wide {
  grid-template-columns: 1fr 1fr;
}

.build-story-triple {
  grid-template-columns: 1fr 1fr 1fr;
}

.build-story-hero {
  grid-template-columns: 1fr;
}

.build-story-final {
  grid-template-columns: 1fr 1fr;
}

.build-card {
  position: relative;
  overflow: hidden;
  border-radius: 8px;
  cursor: pointer;
  background: var(--bg2);
}

.build-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
  transition: transform 0.45s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.build-story-hero .build-card img {
  aspect-ratio: 16 / 7;
}

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

.build-card-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 24px;
  background: linear-gradient(0deg, rgba(0,0,0,0.55) 0%, rgba(0,0,0,0) 100%);
  display: flex;
  align-items: baseline;
  gap: 12px;
  pointer-events: none;
}

.build-step {
  font-size: 0.6rem;
  font-weight: 700;
  color: rgba(255,255,255,0.55);
  letter-spacing: 0.1em;
}

.build-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: #fff;
  letter-spacing: -0.01em;
}

/* LIGHTBOX */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0,0,0,0.92);
  align-items: center;
  justify-content: center;
  cursor: zoom-out;
}

.lightbox.active {
  display: flex;
}

.lightbox img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  border-radius: 6px;
}

.lightbox-close {
  position: absolute;
  top: 24px;
  right: 32px;
  background: none;
  border: none;
  color: rgba(255,255,255,0.7);
  font-size: 2rem;
  cursor: pointer;
  line-height: 1;
  transition: color 0.15s;
}
.lightbox-close:hover {
  color: #fff;
}

/* DETAILS */
.details-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 32px;
}

.detail-card {
  padding: 28px 0;
  border-top: 1px solid var(--border);
}

.detail-num {
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--text3);
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}

.detail-card h3 {
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.detail-card p {
  font-size: 0.82rem;
  color: var(--text2);
  line-height: 1.6;
}

/* PROCESS */
.process-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.process-img img {
  width: 100%;
  border-radius: 6px;
  display: block;
}

.process-text h2 {
  font-size: clamp(1.8rem, 3.5vw, 3rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 20px;
}

.process-text p {
  font-size: 0.9rem;
  color: var(--text2);
  line-height: 1.7;
}

/* BUILD STRIP */
.build-strip {
  padding-top: 0;
}
.build-images {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 12px;
}
.build-images img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  border-radius: 4px;
  display: block;
}

/* ORDER */
.order-section {
  padding: 100px 48px;
  text-align: center;
}

.order-section h2 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 16px;
}

.order-desc {
  font-size: 0.92rem;
  color: var(--text2);
  margin-bottom: 32px;
  max-width: 420px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}

.order-btn {
  display: inline-block;
  padding: 14px 32px;
  background: var(--text);
  color: var(--bg);
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 4px;
  transition: opacity 0.15s;
}
.order-btn:hover { opacity: 0.85; }

/* FOOTER */
footer {
  background: var(--text);
  color: var(--bg);
  padding: 48px;
  text-align: center;
}

.footer-logo {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.4em;
  margin-bottom: 6px;
}

.footer-sub {
  font-size: 0.7rem;
  color: var(--text3);
}

/* RESPONSIVE */
@media (max-width: 768px) {
  nav { padding: 0 24px; }
  .hero { padding: 120px 24px 60px; }
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .section { padding: 60px 24px; }
  .details-grid { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr; gap: 32px; }
  .build-story-wide { grid-template-columns: 1fr; }
  .build-story-triple { grid-template-columns: 1fr; }
  .build-story-final { grid-template-columns: 1fr; }
  .build-story-hero .build-card img { aspect-ratio: 4 / 3; }
  .gallery-headline { font-size: 1.8rem; }
  .gallery-subtitle { margin-bottom: 32px; }
  .build-images { grid-template-columns: 1fr; }
}