* { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: clip; }
body {
  margin: 0;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-md);
  line-height: 1.62;
  overflow-x: clip;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
.skip { position: fixed; left: var(--space-md); top: var(--space-md); z-index: 100; transform: translateY(-180%); background: var(--color-ink); color: var(--color-paper); padding: var(--space-xs) var(--space-sm); }
.skip:focus { transform: translateY(0); }
:focus-visible { outline: 3px solid var(--color-focus); outline-offset: 3px; }
::selection { background: var(--color-accent-soft); }

.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: var(--space-lg);
  padding: var(--space-md) clamp(var(--space-md), 4vw, var(--space-2xl));
  background: color-mix(in oklch, var(--color-paper) 84%, transparent);
  border-bottom: 1px solid color-mix(in oklch, var(--color-line) 70%, transparent);
  backdrop-filter: blur(18px);
}
.scroll-rule { position: absolute; left: 0; right: 0; bottom: -1px; height: 2px; overflow: hidden; }
.scroll-rule span { display: block; width: 100%; height: 100%; transform: scaleX(0); transform-origin: left; background: var(--color-accent); }
.brand { display: inline-flex; align-items: center; gap: var(--space-xs); font-weight: 760; letter-spacing: -0.025em; }
.brand-mark { display: inline-grid; place-items: center; width: 1.9rem; height: 1.9rem; border: 1px solid var(--color-ink); font-family: var(--font-display); font-size: 1.12rem; line-height: 1; }
.nav { justify-self: center; display: flex; gap: clamp(var(--space-sm), 2.4vw, var(--space-xl)); color: var(--color-muted); font-size: var(--text-sm); }
.nav a, .footer a, .contact-form a { transition: color var(--dur-fast) var(--ease-out); }
.nav a:hover, .footer a:hover, .contact-form a:hover { color: var(--color-accent); }
.header-cta { border-bottom: 1px solid var(--color-ink); font-weight: 650; font-size: var(--text-sm); }

.section-panel { position: relative; padding: var(--space-5xl) clamp(var(--space-md), 5vw, var(--space-3xl)); border-bottom: var(--rule); }
.hero {
  min-height: 100svh; display: grid;
  grid-template-columns: 0.18fr minmax(0, 1.05fr) minmax(14rem, 0.46fr) minmax(17rem, 0.52fr);
  align-items: end; gap: clamp(var(--space-xl), 4vw, var(--space-4xl)); padding-top: 9rem;
  background: repeating-linear-gradient(90deg, transparent 0, transparent calc(25% - 1px), color-mix(in oklch, var(--color-line) 26%, transparent) calc(25% - 1px), color-mix(in oklch, var(--color-line) 26%, transparent) 25%);
}
.hero-meta { writing-mode: vertical-rl; transform: rotate(180deg); align-self: center; color: var(--color-muted); font-size: var(--text-sm); }
.signal { margin: 0 0 var(--space-lg); color: var(--color-accent); font-size: var(--text-sm); font-weight: 760; letter-spacing: 0; }
h1, h2, h3 { margin: 0; font-family: var(--font-display); font-style: normal; font-weight: 520; letter-spacing: -0.045em; line-height: 0.94; overflow-wrap: anywhere; }
h1 { max-width: 10ch; font-size: var(--text-3xl); }
h2 { max-width: 12ch; font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); line-height: 1; }
p { margin: 0; }
.hero-side { align-self: end; display: grid; gap: var(--space-xl); padding-bottom: 0.8rem; }
.hero-side p, .split-head p, .process-grid > div p, .price-layout > div p, .seo-copy p { color: var(--color-muted); font-size: var(--text-lg); max-width: 38rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: var(--space-sm); }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 3rem; padding: 0.82rem 1.08rem; border: 1px solid var(--color-ink); font-weight: 760; line-height: 1; transition: transform var(--dur-fast) var(--ease-out), background var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out), opacity var(--dur-fast) var(--ease-out); }
.btn:hover { transform: translateY(-1px); }
.btn:active, a:active { transform: scale(0.985); opacity: 0.72; }
.btn-primary { background: var(--color-ink); color: var(--color-paper); }
.btn-primary:hover { background: var(--color-accent); }
.btn-secondary { background: transparent; color: var(--color-ink); }
.btn-secondary:hover { background: var(--color-panel); }

.hero-visual { margin: 0; align-self: stretch; display: grid; align-items: end; }
.visual-card { position: relative; min-height: 30rem; display: grid; align-content: space-between; padding: var(--space-lg); overflow: hidden; border: var(--rule); background: linear-gradient(145deg, color-mix(in oklch, var(--color-accent-soft) 58%, transparent), transparent 52%), var(--color-panel); }
.visual-card::before { content: ''; position: absolute; inset: 12%; border: 1px solid color-mix(in oklch, var(--color-ink) 18%, transparent); transform: rotate(-7deg); animation: slowTilt 12s var(--ease-in-out) infinite alternate; }
.visual-card::after { content: ''; position: absolute; width: 11rem; height: 11rem; right: -3rem; bottom: 18%; border-radius: 50%; border: 1px solid color-mix(in oklch, var(--color-accent) 35%, transparent); animation: slowDrift 10s var(--ease-in-out) infinite alternate; }
.visual-no, .visual-caption { position: relative; z-index: 1; color: var(--color-muted); font-size: var(--text-sm); }
.visual-name { position: relative; z-index: 1; align-self: center; font-family: var(--font-display); font-size: clamp(3rem, 8vw, 5.8rem); line-height: 0.86; letter-spacing: -0.06em; transform: rotate(-5deg); }
.visual-line { position: relative; z-index: 1; height: 1px; background: var(--color-ink); transform-origin: left; animation: drawLine 1.1s var(--ease-out) both .35s; }
@keyframes drawLine { from { transform: scaleX(0); } to { transform: scaleX(1); } }
@keyframes slowTilt { from { transform: rotate(-8deg) scale(0.96); } to { transform: rotate(4deg) scale(1.02); } }
@keyframes slowDrift { from { transform: translate3d(0, 0, 0); } to { transform: translate3d(-1.2rem, -1rem, 0); } }

.section-number { position: absolute; left: clamp(var(--space-md), 5vw, var(--space-3xl)); top: var(--space-3xl); color: var(--color-muted); font-family: var(--font-display); font-size: var(--text-xl); }
.letter { display: grid; grid-template-columns: minmax(8rem, 0.32fr) minmax(0, 0.84fr); gap: var(--space-4xl); background: var(--color-panel); }
.letter-body { grid-column: 2; display: grid; gap: var(--space-xl); }
.letter-body p { max-width: 48rem; font-family: var(--font-display); font-size: clamp(1.45rem, 1.15rem + 1.2vw, 2.25rem); line-height: 1.18; letter-spacing: -0.025em; }
.approach, .process, .questions { background: var(--color-paper-deep); }
.split-head, .process-grid, .price-layout, .contact { display: grid; grid-template-columns: minmax(0, 0.85fr) minmax(18rem, 0.7fr); gap: clamp(var(--space-xl), 9vw, var(--space-5xl)); align-items: start; padding-left: clamp(0rem, 12vw, 11rem); }
.approach-list { margin-top: var(--space-4xl); display: grid; padding-left: clamp(0rem, 12vw, 11rem); border-top: var(--rule); }
.approach-list article { display: grid; grid-template-columns: minmax(8rem, 0.45fr) minmax(0, 0.75fr) minmax(15rem, 0.6fr); gap: var(--space-xl); padding: var(--space-xl) 0; border-bottom: var(--rule); }
.approach-list span { color: var(--color-accent); font-size: var(--text-sm); font-weight: 760; }
.approach-list p { color: var(--color-muted); max-width: 28rem; }
.manifesto { min-height: 76svh; display: grid; place-items: center; background: var(--color-ink); color: var(--color-paper); }
.manifesto p { max-width: 13ch; font-family: var(--font-display); font-size: var(--text-3xl); line-height: 0.95; letter-spacing: -0.05em; }
.process-grid ol { margin: 0; padding: 0; list-style: none; display: grid; gap: 0; border-top: var(--rule); }
.process-grid li { display: grid; grid-template-columns: minmax(8rem, 0.45fr) minmax(0, 1fr); gap: var(--space-lg); padding: var(--space-lg) 0; border-bottom: var(--rule); }
.process-grid li span { font-weight: 760; color: var(--color-accent); }
.process-grid li p { color: var(--color-muted); }
.price { background: var(--color-panel); }
.price-card { border-top: 2px solid var(--color-ink); padding-top: var(--space-lg); }
.price-card span { color: var(--color-muted); font-size: var(--text-sm); font-weight: 650; }
.price-card strong { display: block; margin: var(--space-xs) 0 var(--space-md); font-family: var(--font-display); font-size: var(--text-3xl); font-weight: 520; letter-spacing: -0.055em; line-height: 0.85; }
.price-card p { color: var(--color-muted); margin-bottom: var(--space-xl); }
.price-card ul { margin: 0; padding: 0; list-style: none; display: grid; border-top: var(--rule); }
.price-card li { padding: var(--space-sm) 0; border-bottom: var(--rule); }
.price-card li::before { content: '— '; color: var(--color-accent); }
.seo { display: grid; grid-template-columns: minmax(8rem, 0.35fr) minmax(0, 0.9fr); gap: var(--space-4xl); }
.seo-copy { grid-column: 2; display: grid; gap: var(--space-xl); }
.seo-copy h2 { max-width: 13ch; }
.questions h2 { margin-left: clamp(0rem, 12vw, 11rem); margin-bottom: var(--space-2xl); }
details { max-width: 56rem; margin-left: clamp(0rem, 12vw, 11rem); border-top: var(--rule); padding: var(--space-lg) 0; }
details:last-child { border-bottom: var(--rule); }
summary { cursor: pointer; font-family: var(--font-display); font-size: var(--text-xl); line-height: 1; }
summary::marker { color: var(--color-accent); }
details p { max-width: 44rem; margin-top: var(--space-md); color: var(--color-muted); }
.contact { background: var(--color-ink); color: var(--color-paper); }
.contact .signal { color: var(--color-paper-deep); }
.contact h2 { max-width: 11ch; }
.contact-form { display: grid; gap: var(--space-md); color: var(--color-paper); }
label { display: grid; gap: var(--space-xs); font-weight: 650; font-size: var(--text-sm); }
input, textarea { width: 100%; border: 1px solid color-mix(in oklch, var(--color-paper) 42%, transparent); background: transparent; color: var(--color-paper); padding: 0.9rem 0; border-width: 0 0 1px; border-radius: 0; }
textarea { resize: vertical; }
input::placeholder, textarea::placeholder { color: color-mix(in oklch, var(--color-paper) 42%, transparent); }
.contact-form .btn { border-color: var(--color-paper); background: var(--color-paper); color: var(--color-ink); margin-top: var(--space-sm); }
.contact-form .btn:hover { background: var(--color-paper-deep); }
.contact-form p { color: color-mix(in oklch, var(--color-paper) 72%, transparent); }
.contact-form a { color: var(--color-paper); font-weight: 650; white-space: nowrap; }
.footer { display: grid; grid-template-columns: 1fr auto auto; gap: var(--space-xl); align-items: center; padding: var(--space-xl) clamp(var(--space-md), 5vw, var(--space-3xl)); background: var(--color-paper); color: var(--color-muted); }
.footer .brand { color: var(--color-ink); }
.footer nav { display: flex; flex-wrap: wrap; gap: var(--space-md); }
.reveal { opacity: 0; transform: translateY(22px); transition: opacity 780ms var(--ease-out), transform 780ms var(--ease-out); }
.reveal.visible { opacity: 1; transform: translateY(0); }
.mobile-contact { display: none; }

@media (max-width: 980px) {
  .site-header { grid-template-columns: 1fr auto; }
  .nav { display: none; }
  .hero, .letter, .split-head, .process-grid, .price-layout, .seo, .contact { grid-template-columns: 1fr; }
  .hero { min-height: auto; padding-top: 8rem; }
  .hero-meta { writing-mode: initial; transform: none; align-self: start; }
  .letter-body, .seo-copy { grid-column: auto; }
  .section-number { position: static; margin-bottom: var(--space-xl); }
  .split-head, .approach-list, .process-grid, .price-layout, .contact, .questions h2, details { padding-left: 0; margin-left: 0; }
  .approach-list article, .process-grid li { grid-template-columns: 1fr; gap: var(--space-sm); }
  .manifesto { min-height: auto; }
  .manifesto p { max-width: 11ch; }
  .footer { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .section-panel { padding: 4.9rem var(--space-md); }
  .site-header { padding: 0.72rem var(--space-md); }
  .brand { font-size: 0.95rem; }
  .brand-mark { width: 1.65rem; height: 1.65rem; }
  .header-cta { display: none; }
  .hero { min-height: 100svh; padding-top: 5.25rem; padding-bottom: 5.8rem; gap: 1.35rem; align-content: start; background: radial-gradient(circle at 88% 18%, color-mix(in oklch, var(--color-accent-soft) 85%, transparent), transparent 28%), repeating-linear-gradient(90deg, transparent 0, transparent calc(33.333% - 1px), color-mix(in oklch, var(--color-line) 32%, transparent) calc(33.333% - 1px), color-mix(in oklch, var(--color-line) 32%, transparent) 33.333%); }
  .hero-meta { font-size: 0.8rem; }
  .signal { margin-bottom: 0.8rem; font-size: 0.82rem; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .btn { width: 100%; }
  h1 { max-width: 8.4ch; font-size: clamp(3.85rem, 17.2vw, 4.95rem); line-height: 0.88; }
  h2 { font-size: clamp(2.35rem, 11.2vw, 4.1rem); line-height: 0.94; }
  .hero-visual { order: 3; }
  .hero-side { order: 4; gap: 1.25rem; }
  .hero-side p { font-size: 1.02rem; line-height: 1.52; }
  .visual-card { min-height: 10.5rem; padding: 1rem; grid-template-columns: auto 1fr; align-items: end; gap: 0.75rem; }
  .visual-no { align-self: start; }
  .visual-name { font-size: clamp(3.2rem, 18vw, 4.7rem); grid-column: 1 / -1; }
  .visual-line { grid-column: 1 / -1; }
  .visual-caption { justify-self: end; text-align: right; }
  .letter-body p { font-size: 1.34rem; line-height: 1.22; }
  .approach-list { margin-top: 2.2rem; }
  .approach-list article { padding: 1.35rem 0; }
  .manifesto { min-height: 72svh; }
  .manifesto p { max-width: 9.6ch; font-size: clamp(3.15rem, 15vw, 4.85rem); }
  .process-grid li { padding: 1.25rem 0; }
  .price-card strong { font-size: clamp(4rem, 22vw, 6rem); }
  .contact { padding-bottom: 6.8rem; }
  .mobile-contact { position: fixed; z-index: 60; left: var(--space-md); right: var(--space-md); bottom: var(--space-md); display: grid; place-items: center; min-height: 3.25rem; background: var(--color-ink); color: var(--color-paper); border: 1px solid color-mix(in oklch, var(--color-paper) 30%, var(--color-ink)); font-weight: 760; transform: translateY(5rem); opacity: 0; transition: opacity 260ms var(--ease-out), transform 260ms var(--ease-out); }
  body.show-mobile-cta .mobile-contact { transform: translateY(0); opacity: 1; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 1ms !important; animation-duration: 1ms !important; }
  .reveal { opacity: 1; transform: none; }
}