:root {
  --bg: #f7f7f5;
  --panel: rgba(255, 255, 255, 0.82);
  --text: #171717;
  --muted: #6f6f6a;
  --line: rgba(23, 23, 23, 0.09);
  --brand: #111111;
  --shadow: 0 18px 60px rgba(15, 15, 15, 0.06);
  --radius-lg: 28px;
  --radius-md: 18px;
  --content-width: 880px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(0, 0, 0, 0.03), transparent 28rem),
    linear-gradient(180deg, #fbfbfa 0%, var(--bg) 100%);
  font-family: "Avenir Next", "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
}

a {
  color: inherit;
}

img {
  max-width: 100%;
  display: block;
}

.shell {
  width: min(calc(100% - 40px), var(--content-width));
  margin: 0 auto;
}

.site-header {
  padding-top: 18px;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0;
}

.wordmark {
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
}

.wordmark span {
  display: inline-block;
  padding: 0.15rem 0;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.nav a {
  text-decoration: none;
  padding: 0.55rem 0.8rem;
  border-radius: 999px;
  color: var(--muted);
  transition: background-color 160ms ease, color 160ms ease;
}

.nav a[data-active="true"],
.nav a:hover {
  color: var(--text);
  background: rgba(17, 17, 17, 0.05);
}

.home {
  padding: 6vh 0 0;
}

.home-hero {
  padding-top: 10vh;
}

.home-card,
.article,
.list-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.home-card {
  padding: 48px;
}

.home-greeting,
.section-label {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 0.94rem;
}

.title {
  margin: 0;
  font-size: clamp(3rem, 8vw, 6rem);
  line-height: 0.94;
  letter-spacing: -0.06em;
  font-weight: 600;
}

.title--home {
  max-width: 8ch;
}

.lede {
  max-width: 34rem;
  font-size: 1.05rem;
  color: var(--muted);
  margin: 18px 0 0;
}

.link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.button,
.link-chip {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  padding: 0.82rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  transition: background-color 160ms ease, border-color 160ms ease;
}

.button--primary {
  background: var(--brand);
  color: white;
}

.button--ghost,
.link-chip {
  background: rgba(255, 255, 255, 0.7);
}

.home-list {
  padding: 18px 0 0;
}

.home-list__intro {
  margin-bottom: 12px;
}

.list-card {
  padding: 24px 26px;
  margin-top: 14px;
}

.list-card__top {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: baseline;
}

.list-card h2,
.article h1,
.article h2 {
  margin: 0;
  letter-spacing: -0.04em;
  font-weight: 600;
}

.list {
  margin: 0;
  padding-left: 1.1rem;
}

.list li + li {
  margin-top: 0.5rem;
}

.article {
  padding: 34px;
  margin: 56px auto;
  max-width: 860px;
}

.article--narrow {
  max-width: 720px;
}

.article__meta {
  color: var(--muted);
  margin: 10px 0 24px;
}

.article section + section {
  margin-top: 24px;
}

.article p,
.article li {
  color: #333330;
}

.muted,
.article a {
  color: var(--muted);
}

.page-shell {
  padding-top: 56px;
}

.site-footer {
  padding: 56px 0 40px;
  color: var(--muted);
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  border-top: 1px solid var(--line);
  padding-top: 20px;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 420ms ease, transform 420ms ease;
}

[data-reveal][data-visible="true"] {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 860px) {
  .site-footer__inner {
    display: grid;
  }

  .nav {
    justify-content: flex-end;
  }

  .home-card {
    padding: 32px 26px;
  }
}

@media (max-width: 640px) {
  .shell {
    width: min(calc(100% - 24px), var(--content-width));
  }

  .site-header__inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .nav {
    justify-content: flex-start;
  }

  .home-card,
  .list-card,
  .article {
    border-radius: 22px;
    padding: 20px;
  }

  .list-card__top {
    display: block;
  }
}