@layer reset, base, components;

@layer reset {
  *, *::before, *::after { box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body, h1, h2, h3, p, ul { margin: 0; }
}

@layer base {
  body { background: var(--xs-paper); color: var(--xs-ink); font-family: var(--xs-font-sans); line-height: 1.55; }
  a { color: inherit; }
  :focus-visible { outline: 3px solid var(--xs-accent); outline-offset: 4px; }
  h1, h2, h3 { line-height: 1.04; letter-spacing: -0.035em; }
  h1 { font-size: clamp(3.4rem, 10vw, 8.8rem); font-weight: 520; }
  h1 em { color: var(--xs-accent); font-family: Georgia, serif; font-weight: 400; }
  h2 { font-size: clamp(2.1rem, 5vw, 4.8rem); max-width: 15ch; }
  h3 { font-size: 1.35rem; }
}

@layer components {
  .skip-link { position: fixed; left: 1rem; top: -5rem; z-index: 10; background: var(--xs-ink); color: white; padding: 0.7rem 1rem; }
  .skip-link:focus { top: 1rem; }
  .site-header, footer { display: flex; align-items: center; justify-content: space-between; gap: 2rem; padding: 1.25rem clamp(1.25rem, 4vw, 4rem); }
  .site-header { border-bottom: 1px solid var(--xs-line); position: sticky; top: 0; z-index: 5; background: rgb(244 241 232 / 92%); backdrop-filter: blur(14px); }
  .wordmark { text-decoration: none; font-weight: 760; letter-spacing: -0.04em; }
  .wordmark span { color: var(--xs-accent); }
  .site-nav, .footer-nav { display: flex; flex-wrap: wrap; gap: 1.5rem; }
  .site-nav a, .footer-nav a, .text-link { text-underline-offset: 0.25em; }
  .hero, .section { padding: clamp(4rem, 9vw, 9rem) clamp(1.25rem, 7vw, 8rem); }
  .hero { min-height: calc(100svh - 5rem); display: grid; align-content: center; background: radial-gradient(circle at 78% 18%, rgb(23 107 85 / 13%), transparent 28rem); }
  .eyebrow { color: var(--xs-accent-strong); font-family: var(--xs-font-mono); font-size: 0.78rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 1.3rem; }
  .hero-copy { max-width: 47rem; font-size: clamp(1.1rem, 2vw, 1.45rem); margin-top: 2rem; }
  .hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1.4rem; margin-top: 2.2rem; }
  .button { background: var(--xs-accent-strong); color: white; padding: 0.9rem 1.2rem; border-radius: var(--xs-radius-small); text-decoration: none; font-weight: 700; }
  .review-note { color: var(--xs-warning); font-family: var(--xs-font-mono); font-size: 0.8rem; margin-top: 2rem; }
  .section { border-top: 1px solid var(--xs-line); }
  .section-heading { display: grid; grid-template-columns: minmax(10rem, 0.45fr) 1fr; gap: 2rem; margin-bottom: 4rem; }
  .feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
  .feature-grid article { min-height: 18rem; display: flex; flex-direction: column; gap: 1.2rem; padding: 1.6rem; border: 1px solid var(--xs-line); border-radius: var(--xs-radius-medium); background: var(--xs-surface); box-shadow: var(--xs-shadow); }
  .feature-grid article p:last-child { color: var(--xs-muted); margin-top: auto; }
  .index { color: var(--xs-accent); font-family: var(--xs-font-mono); }
  .principles { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; background: var(--xs-ink); color: var(--xs-paper); }
  .principles .eyebrow { color: #8bd2bb; }
  .principles ul { list-style: none; padding: 0; border-top: 1px solid rgb(255 255 255 / 25%); }
  .principles li { padding: 1rem 0; border-bottom: 1px solid rgb(255 255 255 / 25%); font-size: 1.2rem; }
  .newsletter { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: end; }
  .newsletter > div > p:last-child { max-width: 42rem; margin-top: 1.5rem; color: var(--xs-muted); }
  form { padding: 1.5rem; background: var(--xs-surface); border: 1px solid var(--xs-line); border-radius: var(--xs-radius-medium); }
  label { display: block; font-weight: 700; margin-bottom: 0.6rem; }
  .form-row { display: flex; }
  input, button { font: inherit; padding: 0.8rem 0.9rem; border: 1px solid var(--xs-line); }
  input { flex: 1; border-radius: var(--xs-radius-small) 0 0 var(--xs-radius-small); }
  button { border-radius: 0 var(--xs-radius-small) var(--xs-radius-small) 0; }
  form p { color: var(--xs-muted); font-size: 0.85rem; margin-top: 0.7rem; }
  .about h2 { max-width: 20ch; }
  footer { border-top: 1px solid var(--xs-line); color: var(--xs-muted); }
  footer > div { display: grid; gap: 0.2rem; }
  .footer-nav { justify-content: flex-end; font-size: 0.9rem; }
  .page-shell { min-height: calc(100svh - 5rem); }
  .page-intro { padding: clamp(4rem, 9vw, 8rem) clamp(1.25rem, 7vw, 8rem); border-bottom: 1px solid var(--xs-line); }
  .page-intro h1 { max-width: 12ch; font-size: clamp(3rem, 8vw, 7rem); }
  .page-summary { max-width: 48rem; margin-top: 2rem; font-size: clamp(1.1rem, 2vw, 1.4rem); color: var(--xs-muted); }
  .content-stack { display: grid; gap: 1rem; padding: clamp(3rem, 7vw, 6rem) clamp(1.25rem, 7vw, 8rem); }
  .content-card { display: grid; grid-template-columns: minmax(12rem, 0.45fr) 1fr; gap: 2rem; padding: 1.6rem 0; border-top: 1px solid var(--xs-line); }
  .content-card p { max-width: 48rem; color: var(--xs-muted); }
  .shell-status { margin-top: 2rem; color: var(--xs-warning); font-family: var(--xs-font-mono); font-size: 0.8rem; }

  @media (max-width: 760px) {
    .site-header { align-items: flex-start; }
    .site-nav { justify-content: flex-end; gap: 0.55rem 1rem; font-size: 0.9rem; }
    .section-heading, .feature-grid, .principles, .newsletter { grid-template-columns: 1fr; }
    .section-heading { margin-bottom: 2.5rem; }
    .principles, .newsletter { gap: 2.5rem; }
    .form-row { flex-direction: column; gap: 0.5rem; }
    input, button { border-radius: var(--xs-radius-small); }
    .content-card { grid-template-columns: 1fr; gap: 0.8rem; }
    footer { align-items: flex-start; flex-direction: column; gap: 1.25rem; }
    .footer-nav { justify-content: flex-start; gap: 0.55rem 1rem; }
  }
}