/* SellStack Landing Page */
:root {
  --bg: #faf8f4;
  --fg: #1a1a18;
  --accent: #e85d04;
  --accent-dim: rgba(232, 93, 4, 0.12);
  --muted: #6e6c66;
  --border: #e8e4dc;
  --card-bg: #ffffff;
  --dark: #1a1a18;
  --dark-dim: rgba(26, 26, 24, 0.06);
}

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'DM Sans', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── NAV ── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 248, 244, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--fg);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.nav-tagline {
  font-size: 0.8rem;
  color: var(--muted);
  letter-spacing: 0.04em;
  text-transform: lowercase;
}
.nav-links { display: flex; align-items: center; gap: 1rem; }
.nav-link {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--accent);
  text-decoration: none;
  transition: opacity 0.15s;
}
.nav-link:hover { opacity: 0.7; }

/* ── HERO ── */
.hero {
  position: relative;
  overflow: hidden;
  padding: 6rem 2rem 4rem;
  border-bottom: 1px solid var(--border);
}
.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.hero-geo {
  position: absolute;
  border-radius: 2px;
}
.geo-1 {
  width: 420px;
  height: 420px;
  right: -80px;
  top: -60px;
  background: radial-gradient(circle at 60% 40%, rgba(232, 93, 4, 0.08) 0%, transparent 70%);
  border: 1px solid rgba(232, 93, 4, 0.15);
}
.geo-2 {
  width: 200px;
  height: 200px;
  right: 160px;
  top: 80px;
  background: radial-gradient(circle, rgba(232, 93, 4, 0.05) 0%, transparent 70%);
  border: 1px solid rgba(232, 93, 4, 0.1);
}
.geo-3 {
  width: 60px;
  height: 60px;
  right: 300px;
  top: 280px;
  background: var(--accent);
  opacity: 0.08;
}
.hero-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.hero-kicker {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.25rem;
}
.hero-headline {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: clamp(2.8rem, 5vw, 4rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--fg);
  margin-bottom: 1.5rem;
}
.hero-lede {
  font-size: 1.1rem;
  color: var(--muted);
  line-height: 1.7;
  max-width: 480px;
}

/* Product cards */
.hero-visual {
  display: flex;
  justify-content: center;
}
.product-card-stack {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  position: relative;
}
.product-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.1rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  transform: translateX(0);
  transition: transform 0.2s ease;
}
.card-1 { transform: translateX(-20px); border-left: 3px solid #e8e4dc; }
.card-2 { transform: translateX(-6px); border-left: 3px solid #c9bfb2; }
.card-3 { transform: translateX(8px); border-left: 3px solid var(--accent); }
.card-icon { color: var(--accent); flex-shrink: 0; opacity: 0.7; }
.card-3 .card-icon { opacity: 1; }
.card-body { flex: 1; display: flex; flex-direction: column; gap: 0.15rem; }
.card-tag {
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
.card-name {
  font-family: 'Syne', sans-serif;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--fg);
}
.card-price {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  color: var(--accent);
}
.card-3 .card-price { font-size: 1.1rem; }

/* Hero stats */
.hero-stats {
  max-width: 1100px;
  margin: 3rem auto 0;
  padding-top: 2.5rem;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 2rem;
}
.stat { display: flex; flex-direction: column; gap: 0.2rem; }
.stat-num {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 1.6rem;
  color: var(--fg);
  letter-spacing: -0.02em;
}
.stat-label { font-size: 0.78rem; color: var(--muted); }
.stat-sep {
  width: 1px;
  height: 40px;
  background: var(--border);
  flex-shrink: 0;
}

/* ── SHARED SECTION STYLES ── */
.section-label {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}
.section-headline {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--fg);
  margin-bottom: 3.5rem;
}

/* ── HOW IT WORKS ── */
.hiw { padding: 5rem 2rem; border-bottom: 1px solid var(--border); }
.hiw-inner { max-width: 1100px; margin: 0 auto; }
.hiw-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem;
}
.hiw-step { position: relative; }
.step-num {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 3.5rem;
  color: var(--accent-dim);
  line-height: 1;
  display: block;
  margin-bottom: 1rem;
  letter-spacing: -0.04em;
}
.step-title {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 1.15rem;
  margin-bottom: 0.6rem;
  color: var(--fg);
}
.step-desc {
  font-size: 0.95rem;
  color: var(--muted);
  line-height: 1.65;
}
.step-desc em { font-style: italic; color: var(--fg); }

/* ── PRODUCT GRID ── */
.products { padding: 5rem 2rem; border-bottom: 1px solid var(--border); background: var(--dark); }
.products .section-label { color: #e85d04; }
.products .section-headline { color: #faf8f4; }
.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}
.prod-item {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 14px;
  padding: 1.75rem 1.5rem;
  transition: background 0.2s, border-color 0.2s;
}
.prod-item:hover {
  background: rgba(255,255,255,0.07);
  border-color: rgba(255,255,255,0.18);
}
.prod-icon {
  color: var(--accent);
  margin-bottom: 1.25rem;
}
.prod-name {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  color: #faf8f4;
  margin-bottom: 0.6rem;
  line-height: 1.3;
}
.prod-desc {
  font-size: 0.85rem;
  color: rgba(250,248,244,0.55);
  line-height: 1.6;
  margin-bottom: 1.25rem;
}
.prod-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 1rem;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.prod-price {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 0.95rem;
  color: #e85d04;
}
.prod-format {
  font-size: 0.7rem;
  color: rgba(250,248,244,0.35);
  letter-spacing: 0.04em;
}

/* ── NICHE ARCHITECTURE ── */
.niche { padding: 5rem 2rem; border-bottom: 1px solid var(--border); }
.niche-inner { max-width: 1100px; margin: 0 auto; }
.niche-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}
.niche-col-label {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid;
}
.wrong-label { color: #9a8f85; border-color: #e8e4dc; }
.right-label { color: var(--accent); border-color: rgba(232, 93, 4, 0.3); }
.niche-item {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.95rem;
  line-height: 1.5;
}
.niche-item p { color: var(--muted); }
.niche-col--right .niche-item p { color: var(--fg); }
.niche-cross, .niche-check {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 1px;
}
.niche-cross { background: #f0ebe4; color: #9a8f85; }
.niche-check { background: var(--accent-dim); color: var(--accent); }
.niche-quote {
  background: var(--dark);
  border-radius: 16px;
  padding: 2.5rem 3rem;
}
.niche-quote blockquote {
  font-family: 'Syne', sans-serif;
  font-weight: 600;
  font-size: 1.2rem;
  line-height: 1.6;
  color: #faf8f4;
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}
.niche-quote cite {
  font-size: 0.8rem;
  color: rgba(250,248,244,0.45);
  font-style: normal;
}

/* ── CLOSING ── */
.closing {
  padding: 6rem 2rem;
  position: relative;
  overflow: hidden;
}
.closing-geo {
  position: absolute;
  width: 600px;
  height: 600px;
  right: -150px;
  top: 50%;
  transform: translateY(-50%);
  background: radial-gradient(circle, rgba(232, 93, 4, 0.06) 0%, transparent 65%);
  pointer-events: none;
}
.closing-inner {
  max-width: 1100px;
  margin: 0 auto;
  position: relative;
}
.closing-label {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.25rem;
}
.closing-headline {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: clamp(2.4rem, 5vw, 3.5rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: var(--fg);
  margin-bottom: 1.75rem;
}
.closing-body {
  font-size: 1.15rem;
  color: var(--muted);
  line-height: 1.75;
  max-width: 640px;
}

/* ── FOOTER ── */
.footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 2rem;
}
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.footer-brand { display: flex; flex-direction: column; gap: 0.2rem; }
.footer-name {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--fg);
  letter-spacing: -0.02em;
}
.footer-tagline {
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.04em;
}
.footer-note {
  font-size: 0.78rem;
  color: var(--muted);
}

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 2.5rem; }
  .hero-visual { display: none; }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .hiw-steps { grid-template-columns: 1fr; gap: 2rem; }
  .niche-grid { grid-template-columns: 1fr; gap: 2rem; }
}
@media (max-width: 600px) {
  .hero { padding: 4rem 1.5rem 3rem; }
  .hero-stats { gap: 1.25rem; flex-wrap: wrap; }
  .stat-sep { display: none; }
  .product-grid { grid-template-columns: 1fr; }
  .hiw, .products, .niche, .closing { padding: 3.5rem 1.5rem; }
  .footer-inner { flex-direction: column; gap: 1rem; align-items: flex-start; }
}