:root {
  --paper: #f3efe6;
  --paper-2: #ebe5d8;
  --ink: #171614;
  --ink-2: #4a4640;
  --line: rgba(23, 22, 20, 0.18);
  --hop: #ff5b1f;
  --hop-ink: #c2410c;
  --on-ink: #f3efe6;
  --sans: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "Apple SD Gothic Neo", "Noto Sans KR", "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --max: 1040px;
  --gutter: clamp(16px, 4vw, 40px);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 17px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }

/* Language: every text comes twice, <span lang="en"> and <span lang="ko">; the page shows one. */
html[data-lang="en"] [lang="ko"]:not(html),
html[data-lang="ko"] [lang="en"]:not(html) { display: none; }

.skip {
  position: absolute; left: -999px; top: 8px;
  background: var(--ink); color: var(--on-ink); padding: 8px 12px; border-radius: 8px; z-index: 10;
}
.skip:focus { left: 8px; }

/* Header */
.top {
  max-width: var(--max); margin: 0 auto; padding: 18px var(--gutter);
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 700; letter-spacing: -0.01em; }
.brand img { width: 32px; height: 32px; }
nav { display: flex; align-items: center; gap: clamp(10px, 2.5vw, 22px); font-size: 15px; }
nav a { text-decoration: none; color: var(--ink-2); }
nav a:hover { color: var(--ink); }
.lang {
  font: 600 13px/1 var(--sans); color: var(--ink); background: transparent;
  border: 1px solid var(--line); border-radius: 999px; padding: 7px 11px; cursor: pointer;
}
.lang:hover { border-color: var(--ink); }

/* Hero */
.hero { max-width: var(--max); margin: 0 auto; padding: clamp(40px, 9vw, 96px) var(--gutter) 24px; }
.kicker { font: 600 13px/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--hop-ink); margin: 0 0 18px; }
h1 { font-size: clamp(34px, 6.4vw, 64px); line-height: 1.08; letter-spacing: -0.025em; margin: 0 0 22px; max-width: 16ch; }
html[data-lang="ko"] h1 { max-width: 14ch; letter-spacing: -0.03em; line-height: 1.18; }
.mark { background: linear-gradient(transparent 62%, rgba(255, 91, 31, 0.35) 62%); }
.lead { font-size: clamp(17px, 2.1vw, 20px); color: var(--ink-2); max-width: 38em; margin: 0 0 28px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 0; }
.button {
  display: inline-flex; align-items: center; gap: 8px; text-decoration: none;
  padding: 12px 20px; border-radius: 999px; border: 1.5px solid var(--ink); font-weight: 600; font-size: 15px;
  transition: transform 0.15s ease, background 0.15s ease;
}
.button:hover { transform: translateY(-2px); }
.button.primary { background: var(--ink); color: var(--on-ink); }
.button.primary:hover { background: var(--hop-ink); border-color: var(--hop-ink); }

/* The bunny hopping from stone to stone (decoration). */
.hops {
  position: relative; height: 110px; margin-top: clamp(28px, 6vw, 56px);
  display: flex; align-items: flex-end; justify-content: space-between; max-width: 560px;
}
.stone { width: 46px; height: 12px; border-radius: 50%; background: var(--paper-2); box-shadow: inset 0 -3px 0 var(--line); }
.bunny {
  position: absolute; left: 1px; bottom: 10px; width: 44px; height: 44px; border-radius: 10px;
  animation: hop 4.8s cubic-bezier(.45, 0, .55, 1) infinite;
}
@keyframes hop {
  0%   { transform: translate(0, 0); }
  8%   { transform: translate(calc((min(560px, 100vw - 2 * var(--gutter)) - 46px) / 6), -58px) rotate(-8deg); }
  16%  { transform: translate(calc((min(560px, 100vw - 2 * var(--gutter)) - 46px) / 3), 0); }
  33%  { transform: translate(calc((min(560px, 100vw - 2 * var(--gutter)) - 46px) / 3), 0); }
  41%  { transform: translate(calc((min(560px, 100vw - 2 * var(--gutter)) - 46px) / 2), -58px) rotate(-8deg); }
  49%  { transform: translate(calc((min(560px, 100vw - 2 * var(--gutter)) - 46px) * 2 / 3), 0); }
  66%  { transform: translate(calc((min(560px, 100vw - 2 * var(--gutter)) - 46px) * 2 / 3), 0); }
  74%  { transform: translate(calc((min(560px, 100vw - 2 * var(--gutter)) - 46px) * 5 / 6), -58px) rotate(-8deg); }
  82%  { transform: translate(calc(min(560px, 100vw - 2 * var(--gutter)) - 46px), 0); }
  92%  { transform: translate(calc(min(560px, 100vw - 2 * var(--gutter)) - 46px), 0); opacity: 1; }
  96%  { opacity: 0; }
  97%  { transform: translate(0, 0); opacity: 0; }
  100% { transform: translate(0, 0); opacity: 1; }
}
@media (prefers-reduced-motion: reduce) {
  .bunny { animation: none; }
  html { scroll-behavior: auto; }
}

/* Sections */
.block { max-width: var(--max); margin: 0 auto; padding: clamp(48px, 8vw, 88px) var(--gutter) 0; }
.block-head { display: flex; align-items: baseline; gap: 14px; border-top: 1.5px solid var(--ink); padding-top: 16px; margin-bottom: 26px; }
.num { font: 600 14px/1 var(--mono); color: var(--hop-ink); }
h2 { font-size: clamp(24px, 3.4vw, 34px); letter-spacing: -0.02em; margin: 0; }
.prose { max-width: 40em; color: var(--ink-2); }
.prose p { margin: 0 0 14px; }

/* Work: tabs, then cards. */
.tabs { display: flex; gap: 8px; margin-bottom: 22px; flex-wrap: wrap; }
.tabs [role="tab"] {
  font: 600 15px/1 var(--sans); color: var(--ink); background: transparent; cursor: pointer;
  border: 1.5px solid var(--line); border-radius: 999px; padding: 10px 16px;
}
.tabs [role="tab"][aria-selected="true"] { background: var(--ink); color: var(--on-ink); border-color: var(--ink); }
.count { font: 600 12px/1 var(--mono); opacity: 0.7; margin-left: 4px; }

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 440px), 1fr)); gap: 18px; }
.card {
  display: flex; gap: 18px; align-items: flex-start;
  background: #fbf8f2; border: 1.5px solid var(--line); border-radius: 22px; padding: 18px;
  transition: transform 0.18s ease, border-color 0.18s ease;
}
.card:hover { transform: translateY(-3px); border-color: var(--ink); }
.icon {
  flex: 0 0 auto; width: 92px; height: 92px; border-radius: 22%; overflow: hidden; position: relative;
  box-shadow: 0 6px 16px rgba(23, 22, 20, 0.16);
}
.icon img { width: 100%; height: 100%; object-fit: cover; }
/* An adaptive icon's two layers: shown as the launcher does, the outer third cut off. */
.icon-layers img { position: absolute; inset: -16%; width: 132%; height: 132%; max-width: none; }
.card-body { min-width: 0; }
h3 { font-size: 21px; margin: 2px 0 6px; letter-spacing: -0.01em; }
h3 small { display: block; font-size: 13px; font-weight: 500; color: var(--ink-2); font-family: var(--mono); margin-top: 2px; }
.card p { margin: 0 0 12px; color: var(--ink-2); font-size: 15.5px; }
.tags { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; padding: 0; margin: 0 0 10px; }
.tags li { font: 600 12px/1 var(--mono); border: 1px solid var(--line); border-radius: 999px; padding: 6px 9px; }
.links { margin: 0; font-size: 14px; }
.links a { color: var(--hop-ink); }

/* Footer */
.bottom {
  max-width: var(--max); margin: clamp(56px, 9vw, 96px) auto 0; padding: 22px var(--gutter) 40px;
  border-top: 1px solid var(--line); color: var(--ink-2); font-size: 13px;
  display: flex; flex-wrap: wrap; gap: 6px 24px; justify-content: space-between;
}
.bottom p { margin: 0; }

@media (max-width: 520px) {
  nav a { display: none; }
  .card { flex-direction: column; }
  .hops { height: 96px; }
}