:root {
  --bg: #FAF9F7;
  --fg: #1A1A1A;
  --accent: #D4612A;
  --accent-light: #F5E6DE;
  --muted: #7A7570;
  --surface: #F0EDE8;
  --border: #DDD9D2;
  --font-serif: 'Instrument Serif', Georgia, serif;
  --font-sans: 'DM Sans', system-ui, sans-serif;
}

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

html { scroll-behavior: smooth; }

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

/* — Navigation — */
.nav {
  padding: 1.5rem 2.5rem;
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex;
  align-items: baseline;
  gap: 1.5rem;
  max-width: 1100px;
  margin: 0 auto;
}
.nav-logo {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 400;
  letter-spacing: -0.01em;
}
.nav-tagline {
  font-size: 0.85rem;
  color: var(--muted);
  font-weight: 300;
}

/* — Hero — */
.hero {
  padding: 5rem 2.5rem 4rem;
}
.hero-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.hero-headline {
  font-family: var(--font-serif);
  font-size: clamp(3.5rem, 6vw, 5.5rem);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 1.75rem;
}
.hero-headline em {
  font-style: italic;
  color: var(--accent);
}
.hero-sub {
  font-size: 1.05rem;
  color: var(--muted);
  line-height: 1.7;
  max-width: 40ch;
  font-weight: 300;
}

/* Cycle strip */
.hero-cycle {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0;
}
.cycle-step {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.cycle-step--final {
  background: var(--accent);
  border-color: var(--accent);
}
.cycle-step--final .step-label,
.cycle-step--final .step-detail {
  color: #fff;
}
.step-label {
  font-weight: 600;
  font-size: 0.9rem;
}
.step-detail {
  font-size: 0.8rem;
  color: var(--muted);
}
.cycle-arrow {
  color: var(--border);
  padding: 0.25rem 0 0.25rem 1.5rem;
}

/* — Iteration — */
.iteration {
  padding: 5rem 2.5rem;
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.iteration-inner {
  max-width: 1100px;
  margin: 0 auto;
}
.iteration-label, .features-label, .philosophy-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}
.iteration-headline {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 3rem;
}
.iteration-headline .accent {
  color: var(--accent);
}
.iteration-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}
.old-card, .new-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
}
.new-card {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent-light);
}
.card-icon {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: var(--accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-bottom: 1.25rem;
}
.card-title {
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 0.75rem;
}
.card-desc {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.6;
}

/* — Features — */
.features {
  padding: 5rem 2.5rem;
}
.features-inner {
  max-width: 1100px;
  margin: 0 auto;
}
.features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem 4rem;
}
.feature-item {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
}
.feature-icon {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  background: var(--accent);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
}
.feature-content h3 {
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
}
.feature-content p {
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.65;
}

/* — Philosophy — */
.philosophy {
  padding: 5rem 2.5rem;
  background: var(--fg);
  color: var(--bg);
}
.philosophy-inner {
  max-width: 1100px;
  margin: 0 auto;
}
.philosophy-label {
  color: var(--accent);
}
.philosophy-headline {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 2rem;
}
.philosophy-body {
  font-size: 1rem;
  line-height: 1.8;
  color: rgba(250,249,247,0.7);
  max-width: 62ch;
  margin-bottom: 1.25rem;
  font-weight: 300;
}
.philosophy-body:last-of-type {
  margin-bottom: 0;
}

/* — Closing — */
.closing {
  padding: 6rem 2.5rem 7rem;
}
.closing-inner {
  max-width: 1100px;
  margin: 0 auto;
  text-align: center;
}
.closing-headline {
  font-family: var(--font-serif);
  font-size: clamp(3rem, 6vw, 5rem);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}
.closing-headline em {
  font-style: italic;
  color: var(--accent);
}
.closing-body {
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 52ch;
  margin: 0 auto;
  line-height: 1.75;
  font-weight: 300;
}

/* — Footer — */
.footer {
  border-top: 1px solid var(--border);
  padding: 2rem 2.5rem;
}
.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: var(--font-serif);
  font-size: 1.1rem;
}
.footer-desc {
  font-size: 0.8rem;
  color: var(--muted);
}
.footer-meta {
  font-size: 0.75rem;
  color: var(--muted);
}

/* — Mobile — */
@media (max-width: 768px) {
  .nav { padding: 1rem 1.5rem; }
  .hero { padding: 3rem 1.5rem 3rem; }
  .hero-inner { grid-template-columns: 1fr; gap: 3rem; }
  .hero-cycle { display: none; }
  .iteration { padding: 3.5rem 1.5rem; }
  .iteration-grid { grid-template-columns: 1fr; }
  .features { padding: 3.5rem 1.5rem; }
  .features-grid { grid-template-columns: 1fr; }
  .philosophy { padding: 3.5rem 1.5rem; }
  .closing { padding: 4rem 1.5rem 5rem; }
  .footer { padding: 1.5rem; }
  .footer-inner { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
}