/* AI Playground Directory - mobile first, no external fonts or trackers */
:root {
  --bg: #0a0c11;
  --bg-2: #0f1219;
  --card: #141821;
  --card-2: #181d28;
  --line: #232a37;
  --line-2: #30394a;
  --tx: #e9edf5;
  --mut: #98a2b5;
  --mut-2: #6f7a8e;
  --acc: #c9f75c;
  --acc-2: #9d7bff;
  --orange: #ffb020;
  --pink: #ff5d8f;
  --teal: #5ad1c8;
  --blue: #8fa7ff;
  --violet: #b58cff;
  --coral: #ff7a59;
  --sky: #7fd1ff;
  --lime: #c9f75c;
  --r: 14px;
  --max: 1180px;
  --shadow: 0 10px 30px rgba(0, 0, 0, .35);
  color-scheme: dark;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--tx);
  font: 16px/1.6 "Segoe UI", "Malgun Gothic", "Hiragino Sans", "Yu Gothic UI", "Yu Gothic", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
/* 한국어는 어절 단위로 줄바꿈 (단어 중간에서 끊기지 않게) */
:lang(ko) h1, :lang(ko) h2, :lang(ko) h3, :lang(ko) p, :lang(ko) li {
  word-break: keep-all; overflow-wrap: break-word;
}
a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
button, input, select, textarea { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--acc); outline-offset: 3px; border-radius: 6px; }

.skip {
  position: absolute; left: -9999px; top: 0; padding: 12px 18px;
  background: var(--acc); color: #0a0c11; font-weight: 700; z-index: 99;
}
.skip:focus { left: 12px; top: 12px; }

.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 18px; }

/* header */
.site-head {
  position: sticky; top: 0; z-index: 20;
  background: rgba(10, 12, 17, .82);
  backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.head-in { display: flex; align-items: center; gap: 14px; height: 62px; }
.logo { display: inline-flex; align-items: center; gap: 9px; font-weight: 800; letter-spacing: -.02em; font-size: 17px; }
.logo:hover { text-decoration: none; }
.logo svg { width: 26px; height: 26px; }
.logo b { color: var(--acc); }
.nav { display: none; gap: 4px; margin-left: 8px; }
.nav a { padding: 8px 11px; border-radius: 9px; color: var(--mut); font-size: 14.5px; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--tx); background: var(--card); text-decoration: none; }
.head-tools { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--card); color: var(--mut); cursor: pointer;
}
.icon-btn:hover { color: var(--tx); border-color: var(--line-2); }
.lang { position: relative; }
.lang summary {
  list-style: none; cursor: pointer; display: inline-flex; align-items: center; gap: 6px;
  height: 38px; padding: 0 12px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--card); color: var(--mut); font-size: 13.5px; font-weight: 600;
}
.lang summary::-webkit-details-marker { display: none; }
.lang[open] summary { color: var(--tx); border-color: var(--line-2); }
.lang-menu {
  position: absolute; right: 0; top: 46px; min-width: 168px; padding: 6px;
  background: var(--card-2); border: 1px solid var(--line-2); border-radius: 12px;
  box-shadow: var(--shadow); display: grid; gap: 2px;
}
.lang-menu a { padding: 8px 10px; border-radius: 8px; font-size: 14px; color: var(--mut); }
.lang-menu a:hover { background: #202634; color: var(--tx); text-decoration: none; }
.lang-menu a[aria-current="true"] { color: var(--acc); }
@media (min-width: 800px) { .nav { display: flex; } }

/* hero */
.hero { position: relative; padding: 52px 0 30px; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: -40% -10% auto;
  height: 480px;
  background:
    radial-gradient(420px 260px at 18% 30%, rgba(201, 247, 92, .13), transparent 65%),
    radial-gradient(480px 300px at 82% 18%, rgba(157, 123, 255, .16), transparent 65%);
  pointer-events: none;
}
.hero-in { position: relative; }
.kicker {
  display: inline-flex; align-items: center; gap: 8px; margin: 0 0 16px;
  padding: 6px 11px; border: 1px solid var(--line-2); border-radius: 999px;
  font-size: 12.5px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
  color: var(--mut);
}
.kicker i { width: 7px; height: 7px; border-radius: 50%; background: var(--acc); }
@media (max-width: 560px) {
  .kicker { font-size: 11px; letter-spacing: .05em; padding: 5px 9px; line-height: 1.45; }
}
h1 {
  margin: 0 0 14px; font-size: clamp(34px, 7.2vw, 64px); line-height: 1.02;
  letter-spacing: -.035em; font-weight: 800; max-width: 17ch;
}
h1 em { font-style: normal; color: var(--acc); white-space: nowrap; }
:lang(ja) h1 { max-width: none; font-size: clamp(26px, 6vw, 58px); }
.lede { margin: 0 0 26px; max-width: 58ch; color: var(--mut); font-size: clamp(15.5px, 2.2vw, 18px); }
.searchbar { display: flex; gap: 8px; max-width: 620px; }
.searchbar .field {
  flex: 1; display: flex; align-items: center; gap: 10px;
  background: var(--card); border: 1px solid var(--line-2); border-radius: 12px;
  padding: 0 14px; height: 52px;
}
.searchbar .field svg { width: 18px; height: 18px; color: var(--mut-2); flex: none; }
.searchbar input {
  flex: 1; min-width: 0; background: none; border: 0; outline: 0; font-size: 16px;
}
.searchbar input::placeholder { color: var(--mut-2); }
.searchbar .go {
  height: 52px; padding: 0 20px; border: 0; border-radius: 12px; cursor: pointer;
  background: var(--acc); color: #0a0c11; font-weight: 800;
}
.stats { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: 18px; color: var(--mut-2); font-size: 13.5px; }
.stats b { color: var(--tx); font-weight: 700; }

/* category chips */
.chips { display: flex; gap: 8px; overflow-x: auto; padding: 4px 0 6px; scrollbar-width: none; }
.chips::-webkit-scrollbar { display: none; }
.chip {
  flex: none; display: inline-flex; align-items: center; gap: 7px;
  padding: 8px 13px; border-radius: 999px; border: 1px solid var(--line);
  background: var(--card); color: var(--mut); font-size: 13.5px; font-weight: 600;
}
.chip:hover { color: var(--tx); border-color: var(--line-2); text-decoration: none; }
.chip .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--c, var(--acc)); }
.chip[aria-current="true"] { background: var(--tx); color: #0a0c11; border-color: var(--tx); }

/* sections */
section.block { padding: 34px 0 6px; }
.sec-head { display: flex; align-items: end; justify-content: space-between; gap: 16px; margin-bottom: 18px; }
.sec-head h2 { margin: 0; font-size: clamp(20px, 3.4vw, 27px); letter-spacing: -.02em; }
.sec-head p { margin: 6px 0 0; color: var(--mut-2); font-size: 14px; }
.sec-head .more { font-size: 14px; font-weight: 700; color: var(--acc); white-space: nowrap; }

/* cards */
.grid { display: grid; gap: 14px; grid-template-columns: 1fr; }
@media (min-width: 560px) { .grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 900px) { .grid { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 1100px) { .grid.grid-4 { grid-template-columns: repeat(4, 1fr); } }

.card {
  position: relative; display: flex; flex-direction: column;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--r);
  overflow: hidden; transition: transform .15s ease, border-color .15s ease, box-shadow .15s ease;
}
.card:hover { transform: translateY(-2px); border-color: var(--line-2); box-shadow: var(--shadow); }
.card .thumb { position: relative; aspect-ratio: 480 / 252; background: var(--card-2); }
.card .thumb img { width: 100%; height: 100%; object-fit: cover; }
.card .body { padding: 13px 14px 15px; display: flex; flex-direction: column; gap: 6px; flex: 1; }
.card h3 { margin: 0; font-size: 16.5px; letter-spacing: -.01em; line-height: 1.3; }
.card .concept { margin: 0; color: var(--mut); font-size: 13.5px; line-height: 1.5; }
.card .meta { margin-top: auto; padding-top: 8px; display: flex; flex-wrap: wrap; align-items: center; gap: 6px 8px; color: var(--mut-2); font-size: 12px; }
.card .meta .cat { color: var(--c, var(--acc)); font-weight: 700; }
.badge {
  display: inline-flex; align-items: center; gap: 5px; padding: 3px 7px;
  border-radius: 6px; font-size: 11px; font-weight: 700; letter-spacing: .02em;
  background: #1e2532; color: var(--mut);
}
.badge.free { background: rgba(201, 247, 92, .12); color: var(--acc); }
.badge.own { background: rgba(157, 123, 255, .15); color: var(--violet); }
.card .own-mark {
  position: absolute; top: 9px; left: 9px; padding: 4px 8px; border-radius: 6px;
  background: rgba(10, 12, 17, .78); backdrop-filter: blur(4px);
  color: var(--violet); font-size: 10.5px; font-weight: 800; letter-spacing: .06em;
}

.card .hot-mark {
  position: absolute; top: 9px; right: 9px; padding: 4px 8px; border-radius: 6px;
  background: #ff5a3c; color: #fff; font-size: 10.5px; font-weight: 800; letter-spacing: .06em;
  box-shadow: 0 2px 10px rgba(255, 90, 60, .35);
}
.card .hot-why {
  margin: 2px 0 0; padding: 8px 10px; border-radius: 8px; font-size: 12.5px; line-height: 1.5;
  background: rgba(255, 90, 60, .08); border: 1px solid rgba(255, 90, 60, .25); color: var(--mut);
}
.card .hot-why b { color: #ff8a6e; font-weight: 700; }
.card .hot-why a { color: var(--acc); font-weight: 700; }
.hot-dot {
  display: inline-block; width: 10px; height: 10px; margin-right: 10px; border-radius: 50%;
  background: #ff5a3c; box-shadow: 0 0 0 4px rgba(255, 90, 60, .18); vertical-align: middle;
}
.hot-note { margin: 0 0 20px; color: var(--mut-2); font-size: 13.5px; }
.pill-hot { color: #ff8a6e; border-color: rgba(255, 90, 60, .45); font-weight: 700; }

/* category tiles */
.cats { display: grid; gap: 12px; grid-template-columns: repeat(2, 1fr); }
@media (min-width: 760px) { .cats { grid-template-columns: repeat(4, 1fr); } }
.cat-tile {
  position: relative; padding: 16px 14px 15px; border-radius: var(--r);
  background: linear-gradient(160deg, color-mix(in srgb, var(--c) 14%, var(--card)), var(--card) 65%);
  border: 1px solid var(--line); min-height: 118px; display: flex; flex-direction: column; gap: 4px;
}
.cat-tile:hover { border-color: var(--c); text-decoration: none; }
.cat-tile .ic { width: 30px; height: 30px; color: var(--c); margin-bottom: 6px; }
.cat-tile b { font-size: 15.5px; }
.cat-tile span { color: var(--mut-2); font-size: 12.5px; }
.cat-tile .count { position: absolute; right: 13px; bottom: 12px; font-size: 12px; color: var(--mut-2); font-variant-numeric: tabular-nums; }

/* filter bar */
.toolbar { display: grid; gap: 10px; padding: 14px; background: var(--bg-2); border: 1px solid var(--line); border-radius: var(--r); margin: 18px 0 20px; }
@media (min-width: 760px) { .toolbar { grid-template-columns: 1fr auto; align-items: center; } }
@media (min-width: 1000px) { .toolbar { grid-template-columns: minmax(200px, 1fr) auto auto auto; } }
.toolbar .field { display: flex; align-items: center; gap: 10px; background: var(--card); border: 1px solid var(--line-2); border-radius: 10px; padding: 0 12px; height: 44px; }
.toolbar .field input { flex: 1; min-width: 0; background: none; border: 0; outline: 0; }
.toolbar select { height: 44px; padding: 0 12px; border-radius: 10px; border: 1px solid var(--line-2); background: var(--card); }
.check { display: inline-flex; align-items: center; gap: 8px; height: 44px; padding: 0 12px; border: 1px solid var(--line-2); border-radius: 10px; background: var(--card); font-size: 14px; color: var(--mut); cursor: pointer; }
.check input { accent-color: var(--acc); }
.result-line { color: var(--mut-2); font-size: 13.5px; margin: 0 0 12px; }
.empty { padding: 40px 0; text-align: center; color: var(--mut); }
.empty b { color: var(--tx); }

/* site page */
.crumbs { display: flex; flex-wrap: wrap; gap: 6px; padding: 18px 0 0; color: var(--mut-2); font-size: 13px; }
.crumbs a { color: var(--mut); }
.site-hero { display: grid; gap: 22px; padding: 20px 0 10px; }
@media (min-width: 900px) { .site-hero { grid-template-columns: 1.5fr .9fr; align-items: start; } }
.site-hero .cover { border-radius: var(--r); overflow: hidden; border: 1px solid var(--line); background: var(--card); }
.site-hero h1 { font-size: clamp(30px, 5vw, 44px); max-width: none; margin-bottom: 10px; }
.site-hero .byline { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 16px; color: var(--mut); font-size: 14px; }
.site-hero .lead { color: var(--tx); font-size: 17px; margin: 0 0 14px; }
.site-hero .desc { color: var(--mut); margin: 0 0 22px; }
.cta-row { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 18px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 48px; padding: 0 20px; border-radius: 11px; font-weight: 800; font-size: 15px;
  border: 1px solid var(--line-2); background: var(--card); cursor: pointer;
}
.btn.primary { background: var(--acc); color: #0a0c11; border-color: var(--acc); }
.btn:hover { text-decoration: none; filter: brightness(1.06); }
.aside-box { background: var(--bg-2); border: 1px solid var(--line); border-radius: var(--r); padding: 16px; }
.aside-box h2 { margin: 0 0 12px; font-size: 13px; letter-spacing: .09em; text-transform: uppercase; color: var(--mut-2); }
.facts { display: grid; gap: 10px; margin: 0; }
.facts div { display: flex; justify-content: space-between; gap: 12px; font-size: 14px; border-bottom: 1px dashed var(--line); padding-bottom: 9px; }
.facts div:last-child { border: 0; padding-bottom: 0; }
.facts dt { color: var(--mut-2); }
.facts dd { margin: 0; text-align: right; }
.prose { max-width: 68ch; }
.prose h2 { margin: 34px 0 10px; font-size: 22px; letter-spacing: -.01em; }
.prose h3 { margin: 24px 0 8px; font-size: 17px; }
.prose p, .prose li { color: var(--mut); }
.prose li { margin: 6px 0; }
.prose a { color: var(--acc); }
.note { padding: 12px 14px; border-left: 3px solid var(--acc); background: var(--bg-2); border-radius: 0 10px 10px 0; color: var(--mut); font-size: 14px; }

/* ads */
.ad-slot {
  display: grid; place-items: center; gap: 6px; min-height: 100px;
  border: 1px dashed var(--line-2); border-radius: 12px; color: var(--mut-2);
  font-size: 11.5px; letter-spacing: .12em; text-transform: uppercase; padding: 18px;
  background: rgba(255, 255, 255, .012);
}
.ad-slot.leader { min-height: 110px; margin: 26px 0; }
.ad-slot.side { min-height: 250px; margin-top: 16px; }

/* forms */
.form { display: grid; gap: 14px; max-width: 620px; }
.form label { display: grid; gap: 6px; font-size: 14px; font-weight: 600; }
.form input, .form textarea, .form select {
  width: 100%; padding: 12px 13px; border-radius: 10px; border: 1px solid var(--line-2);
  background: var(--card); outline: 0;
}
.form textarea { min-height: 130px; resize: vertical; }
.form .hint { color: var(--mut-2); font-size: 12.5px; font-weight: 400; }
.form .row { display: grid; gap: 14px; }
@media (min-width: 640px) { .form .row { grid-template-columns: 1fr 1fr; } }
.form-msg { font-size: 13.5px; color: var(--mut); }

/* footer */
.site-foot { margin-top: 60px; border-top: 1px solid var(--line); background: var(--bg-2); }
.foot-in { display: grid; gap: 26px; padding: 38px 0 30px; }
@media (min-width: 800px) { .foot-in { grid-template-columns: 1.4fr 1fr 1fr 1fr; } }
.foot-in h3 { margin: 0 0 10px; font-size: 12px; letter-spacing: .1em; text-transform: uppercase; color: var(--mut-2); }
.foot-in ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 7px; }
.foot-in a { color: var(--mut); font-size: 14px; }
.foot-in p { color: var(--mut-2); font-size: 13px; margin: 0; max-width: 40ch; }
.foot-bottom { border-top: 1px solid var(--line); padding: 16px 0 26px; color: var(--mut-2); font-size: 12.5px; display: flex; flex-wrap: wrap; gap: 8px 18px; }

/* misc */
.ic { width: 24px; height: 24px; flex: none; }
.nb { white-space: nowrap; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.center { text-align: center; }
.pill-row { display: flex; flex-wrap: wrap; gap: 8px; }
.pill { padding: 5px 10px; border-radius: 999px; background: var(--card); border: 1px solid var(--line); font-size: 12.5px; color: var(--mut); }
.updated { color: var(--mut-2); font-size: 13px; }
.error-page { padding: 90px 0; text-align: center; }
.error-page h1 { font-size: clamp(48px, 12vw, 96px); margin: 0 0 8px; color: var(--acc); max-width: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}

/* 11/08 중국어 간체: 중국어 글꼴을 앞에, 제목은 일본어처럼 폭 제한 없이 */
:lang(zh) body, body:lang(zh) {
  font-family: "Segoe UI", "Microsoft YaHei", "PingFang SC", "Noto Sans SC", "Source Han Sans SC", system-ui, sans-serif;
}
:lang(zh) h1 { max-width: none; font-size: clamp(26px, 6vw, 58px); }