/* ── Design tokens ── */
:root {
  --tone-deep: #0f0f0f;
  --tone-mid: #161616;
  --tone-light: #1c1c1c;
  --text-primary: #e8e4df;
  --text-muted: #9a9590;
  --text-warm: #c4b8a8;
  --accent-warm: #8a7f72;

  --font-serif: "Libre Baskerville", "Didot", "Playfair Display", Georgia, serif;
  --font-sans: "Inter", system-ui, -apple-system, sans-serif;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 7rem;
  --space-2xl: 10rem;

  --transition-slow: 1.2s cubic-bezier(0.25, 0.1, 0.25, 1);
  --transition-medium: 0.8s cubic-bezier(0.25, 0.1, 0.25, 1);
  --hero-stagger: 0.5s;
  --hero-duration: 1.4s;
  --instinct-stagger: 0.35s;
}

/* ── Reset & base ── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-weight: 300;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--text-primary);
  background-color: var(--tone-mid);
  min-height: 100dvh;
  overflow-x: hidden;
}

/* ── Ink depth background layers ── */
.ink-canvas {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background-color: var(--tone-mid);
  background-size: 512px 512px;
  background-repeat: repeat;
  filter: blur(0.6px);
}

.grain-overlay {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 180px 180px;
}

/* ── Utilities ── */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.section-inner {
  width: min(90vw, 680px);
  margin-inline: auto;
}

/* ── Fade-in animation ── */
.fade-in {
  opacity: 0;
  transform: translateY(12px);
  transition:
    opacity var(--transition-slow),
    transform var(--transition-slow);
}

.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Hero stagger ── */
.hero-reveal {
  opacity: 0;
  transform: translateY(12px);
  transition:
    opacity var(--hero-duration) cubic-bezier(0.25, 0.1, 0.25, 1),
    transform var(--hero-duration) cubic-bezier(0.25, 0.1, 0.25, 1);
}

.hero__inner.is-loaded .hero-reveal {
  opacity: 1;
  transform: translateY(0);
}

.hero__inner.is-loaded .hero-reveal:nth-child(1) {
  transition-delay: 0s;
}

.hero__inner.is-loaded .hero-reveal:nth-child(2) {
  transition-delay: var(--hero-stagger);
}

.hero__inner.is-loaded .hero-reveal:nth-child(3) {
  transition-delay: calc(var(--hero-stagger) * 2);
}

/* ── Instincts cascade ── */
.instincts__list.is-cascade .instinct.fade-in:nth-child(1) {
  transition-delay: calc(var(--instinct-stagger) * 1);
}

.instincts__list.is-cascade .instinct.fade-in:nth-child(2) {
  transition-delay: calc(var(--instinct-stagger) * 2);
}

.instincts__list.is-cascade .instinct.fade-in:nth-child(3) {
  transition-delay: calc(var(--instinct-stagger) * 3);
}

.instincts__list.is-cascade .instinct.fade-in:nth-child(4) {
  transition-delay: calc(var(--instinct-stagger) * 4);
}

.instincts__list.is-cascade .instinct.fade-in:nth-child(5) {
  transition-delay: calc(var(--instinct-stagger) * 5);
}

/* ── Hero ── */
.hero {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100dvh;
  padding: var(--space-md);
  text-align: center;
}

.hero__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
}

.wordmark {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  letter-spacing: 0.35em;
  text-indent: 0.35em;
  color: var(--text-primary);
  line-height: 1.1;
}

.wordmark__mark {
  font-size: 0.45em;
  letter-spacing: 0;
  vertical-align: super;
  margin-left: 0.05em;
  color: var(--text-muted);
}

.hero__tagline {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--text-warm);
  letter-spacing: 0.04em;
  font-weight: 400;
}

/* ── CTA buttons ── */
.cta {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  font-weight: 400;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 1rem 2.4rem;
  cursor: pointer;
  border: none;
  background: none;
  transition:
    color var(--transition-medium),
    border-color var(--transition-medium),
    background-color var(--transition-medium);
}

.cta--outline {
  color: var(--text-primary);
  border: 1px solid rgba(232, 228, 223, 0.25);
  margin-top: var(--space-sm);
}

.cta--outline:hover,
.cta--outline:focus-visible {
  border-color: rgba(232, 228, 223, 0.5);
  color: var(--text-primary);
  outline: none;
}

.cta--solid {
  color: var(--tone-deep);
  background-color: var(--text-primary);
  border: 1px solid var(--text-primary);
  width: 100%;
  margin-top: var(--space-sm);
}

.cta--solid:hover,
.cta--solid:focus-visible {
  background-color: transparent;
  color: var(--text-primary);
  outline: none;
}

/* ── Philosophy ── */
.philosophy {
  padding-block: var(--space-2xl);
  text-align: center;
}

.philosophy__copy {
  font-family: var(--font-serif);
  font-size: clamp(1.125rem, 3vw, 1.5rem);
  font-weight: 400;
  line-height: 2;
  color: var(--text-primary);
  border: none;
}

.philosophy__copy p + p {
  margin-top: 0.25em;
}

/* ── Instincts ── */
.instincts {
  padding-block: var(--space-2xl);
  text-align: center;
}

.instincts__intro {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(0.875rem, 2vw, 1rem);
  color: var(--text-muted);
  letter-spacing: 0.06em;
  font-weight: 400;
  margin-bottom: var(--space-xl);
}

.instincts__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.instinct {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
}

.instinct__name {
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 3.5vw, 1.625rem);
  letter-spacing: 0.18em;
  text-indent: 0.18em;
  color: var(--text-primary);
  font-weight: 400;
}

.instinct__dash {
  font-family: var(--font-serif);
  color: var(--accent-warm);
  font-size: 0.75rem;
  opacity: 0.6;
}

.instinct__essence {
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 300;
}

/* ── Early access form ── */
.early-access {
  padding-block: var(--space-2xl);
  text-align: center;
}

.early-access__lead {
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 3.5vw, 1.75rem);
  font-weight: 400;
  color: var(--text-primary);
  margin-bottom: var(--space-lg);
  letter-spacing: 0.02em;
}

.access-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  text-align: left;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.form-label {
  font-family: var(--font-sans);
  font-size: 0.625rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 400;
}

.form-input {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 300;
  color: var(--text-primary);
  background: transparent;
  border: none;
  border-bottom: 1px solid rgba(232, 228, 223, 0.15);
  padding: 0.75rem 0;
  outline: none;
  transition: border-color var(--transition-medium);
  width: 100%;
}

.form-input::placeholder {
  color: rgba(154, 149, 144, 0.4);
}

.form-input:focus {
  border-bottom-color: rgba(232, 228, 223, 0.4);
}

.form-input:invalid:not(:placeholder-shown) {
  border-bottom-color: rgba(196, 184, 168, 0.5);
}

.form-status {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--text-warm);
  text-align: center;
  min-height: 1.2em;
  margin-top: var(--space-xs);
}

.form-status.is-error {
  color: #a09080;
}

/* ── Footer ── */
.site-footer {
  padding-block: var(--space-xl) var(--space-lg);
  text-align: center;
}

.footer__brand {
  font-family: var(--font-serif);
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  color: var(--text-muted);
}

.footer__brand sup {
  font-size: 0.6em;
}

.footer__tag {
  font-family: var(--font-sans);
  font-size: 0.625rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(154, 149, 144, 0.6);
  margin-top: var(--space-xs);
  font-weight: 300;
}

/* ── Responsive refinements ── */
@media (min-width: 768px) {
  .instincts__list {
    gap: var(--space-xl);
  }

  .access-form {
    max-width: 420px;
    margin-inline: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .fade-in,
  .hero-reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .cta,
  .form-input {
    transition: none;
  }
}