:root {
  --paper: #f6f3ee;
  --ink: #161616;
  --muted: #6f6a63;
  --accent: #dd4132;
  --line: rgba(22, 22, 22, .14);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100svh;
  background: var(--paper);
  color: var(--ink);
  font-family: "Helvetica Neue", "PingFang HK", "Noto Sans HK", "Microsoft JhengHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

.wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: clamp(24px, 5vw, 72px);
}

.top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.brand {
  font-size: clamp(13px, 1.4vw, 16px);
  font-weight: 600;
  letter-spacing: .04em;
}

.brand span {
  display: inline-block;
  margin-left: .6em;
  color: var(--muted);
  font-size: .72em;
  font-weight: 500;
  letter-spacing: .16em;
}

.top .tag {
  color: var(--muted);
  font-size: 11px;
  letter-spacing: .2em;
  white-space: nowrap;
}

header.hero {
  padding: clamp(48px, 10vh, 120px) 0 clamp(32px, 6vh, 72px);
}

h1 {
  margin: 0;
  font-size: clamp(40px, 7vw, 88px);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: .01em;
}

.lede {
  margin: 20px 0 0;
  color: var(--muted);
  font-size: clamp(14px, 1.5vw, 17px);
  letter-spacing: .04em;
}

.links {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.links li { border-bottom: 1px solid var(--line); }

.links a {
  display: grid;
  grid-template-columns: 56px 1fr auto;
  align-items: center;
  gap: 18px;
  padding: clamp(20px, 3.4vw, 30px) 4px;
  text-decoration: none;
  transition: color .2s, padding .2s;
}

.links a:hover {
  color: var(--accent);
  padding-left: 12px;
}

.no {
  color: var(--muted);
  font-size: 12px;
  letter-spacing: .16em;
}

.links .name {
  display: block;
  font-size: clamp(19px, 2.4vw, 26px);
  font-weight: 500;
}

.links .desc {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: clamp(12px, 1.2vw, 14px);
  line-height: 1.6;
}

.links .arrow {
  color: var(--muted);
  font-size: 18px;
}

.links a:hover .arrow { color: var(--accent); }

.ar-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(36px, 6vh, 64px);
}

.ar-row a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: .12em;
  text-decoration: none;
  transition: border-color .2s, color .2s;
}

.ar-row a:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.ar-row i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  opacity: .5;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: clamp(48px, 8vh, 96px);
  padding-top: 20px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 11px;
  letter-spacing: .12em;
}

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* 404 */
.notfound {
  display: grid;
  place-content: center;
  min-height: 100svh;
  padding: 32px;
  text-align: center;
}

.notfound p {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 12px;
  letter-spacing: .3em;
}

.notfound h1 {
  font-size: clamp(32px, 6vw, 64px);
}

.notfound .back {
  display: inline-block;
  margin-top: 28px;
  padding: 12px 22px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: .12em;
  text-decoration: none;
}

.notfound .back:hover { border-color: var(--accent); color: var(--accent); }

@media (max-width: 640px) {
  .brand span { display: block; margin: .35em 0 0; }
  .top .tag { display: none; }
  .links a { grid-template-columns: 40px 1fr auto; gap: 12px; }
}