:root {
  --ink: #16171a;
  --paper: #f6f5f2;
  --line: #d8d6d0;
  --accent: #16171a;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.grid-bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(to right, var(--line) 1px, transparent 1px);
  background-size: 25% 100%;
  opacity: 0.5;
  z-index: 0;
}

header {
  position: relative;
  z-index: 1;
  padding: 28px 40px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-bottom: 1px solid var(--line);
}

header .mark {
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.02em;
  text-decoration: none;
  color: var(--ink);
}

header nav a {
  color: var(--ink);
  text-decoration: none;
  font-size: 14px;
  margin-left: 24px;
  border-bottom: 1px solid transparent;
}

header nav a:hover,
header nav a:focus-visible {
  border-bottom-color: var(--ink);
}

main {
  position: relative;
  z-index: 1;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 60px 40px;
  max-width: 760px;
}

.tag {
  font-size: 13px;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 18px;
}

h1 {
  font-size: clamp(36px, 6vw, 64px);
  line-height: 1.02;
  letter-spacing: -0.03em;
  margin: 0 0 22px 0;
  max-width: 14ch;
}

p.lede {
  font-size: 18px;
  line-height: 1.55;
  max-width: 52ch;
  color: #45464b;
}

.panel {
  position: relative;
  z-index: 1;
  margin: 0 40px 40px 40px;
  padding: 24px 28px;
  border: 1px solid var(--line);
  background: #fff;
  max-width: 680px;
}

.panel h2 {
  font-size: 14px;
  text-transform: none;
  letter-spacing: 0;
  margin: 0 0 10px 0;
}

.panel p {
  font-size: 14px;
  line-height: 1.6;
  color: #45464b;
  margin: 0;
}

.site-list {
  position: relative;
  z-index: 1;
  padding: 0 40px 60px 40px;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  max-width: 680px;
}

.site-list a {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  background: var(--paper);
  padding: 20px 24px;
  text-decoration: none;
  color: var(--ink);
}

.site-list a:hover,
.site-list a:focus-visible {
  background: #fff;
}

.site-list .name {
  font-size: 18px;
  font-weight: 600;
}

.site-list .path {
  font-size: 13px;
  color: #7a7b80;
}

footer {
  position: relative;
  z-index: 1;
  padding: 20px 40px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  color: #7a7b80;
}