/* ───────────────────────────────────────────────────────────
   김범준 포트폴리오 — cosmos.rchcom.kr

   블랙 앤 화이트, 기본은 다크 모드.
   색을 쓰지 않는 대신 다음으로 위계를 만든다.
   - 큰 글자와 작은 모노 라벨의 대비
   - 1px 헤어라인
   - 각진 모서리 (radius 2px)
   - 작품 이미지만 hover 때 색이 돌아온다
   ─────────────────────────────────────────────────────────── */

/* 라이트 */
:root {
  color-scheme: light;
  --bg: #fafafa;
  --surface: #f0f0f0;
  --ink: #0a0a0a;
  --ink-2: #555555;
  --ink-3: #8f8f8f;
  --line: #e4e4e4;
  --line-2: #c9c9c9;
  --on-ink: #fafafa;
  --header-bg: rgba(250, 250, 250, .8);
  --grid: rgba(0, 0, 0, .045);

  --font: "Pretendard Variable", Pretendard, -apple-system, "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --wrap: 1240px;
  --radius: 2px;
  --ease: cubic-bezier(.2, .7, .2, 1);
}

/* 다크 (기본) */
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0a0a0a;
  --surface: #121212;
  --ink: #ededed;
  --ink-2: #a3a3a3;
  --ink-3: #666666;
  --line: #1f1f1f;
  --line-2: #333333;
  --on-ink: #0a0a0a;
  --header-bg: rgba(10, 10, 10, .72);
  --grid: rgba(255, 255, 255, .04);
}

/* ── 기본 ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 16px/1.7 var(--font);
  letter-spacing: -.005em;
  -webkit-font-smoothing: antialiased;
  word-break: keep-all;
  transition: background-color .3s, color .3s;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, p { margin: 0; }
::selection { background: var(--ink); color: var(--on-ink); }
:focus-visible { outline: 1px solid var(--ink); outline-offset: 3px; }

.wrap { width: min(var(--wrap), 100% - 48px); margin-inline: auto; }
.mono { font-family: var(--mono); letter-spacing: 0; }
.dim { color: var(--ink-3); }
.br-sm { display: none; }

/* ── 헤더 ─────────────────────────────────────────────── */
.site-header {
  position: sticky; top: 0; z-index: 30;
  background: var(--header-bg);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; gap: 32px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; font-size: 15px; letter-spacing: -.01em; }
/* 로고 자리. 코스모스 로고가 나오면 교체한다 */
.brand-mark {
  width: 16px; height: 16px; border-radius: 50%;
  border: 1.5px solid var(--ink);
  background: radial-gradient(circle, var(--ink) 0 2.5px, transparent 3px);
}
.site-nav { margin-left: auto; display: flex; gap: 28px; }
.site-nav a {
  position: relative; font-size: 14px; color: var(--ink-2); transition: color .2s;
}
.site-nav a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -4px; height: 1px;
  background: var(--ink); transform: scaleX(0); transform-origin: left; transition: transform .3s var(--ease);
}
.site-nav a:hover, .site-nav a[aria-current] { color: var(--ink); }
.site-nav a:hover::after, .site-nav a[aria-current]::after { transform: scaleX(1); }

.menu-toggle { display: none; }
.theme-toggle {
  flex: none; display: grid; place-items: center; width: 32px; height: 32px; padding: 0;
  border: 1px solid var(--line-2); border-radius: var(--radius);
  background: transparent; color: var(--ink); cursor: pointer; transition: border-color .2s, background .2s;
}
.theme-toggle:hover { border-color: var(--ink); }
.theme-toggle svg { width: 16px; height: 16px; }
.theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

/* ── 버튼 ─────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  height: 44px; padding: 0 20px; border-radius: var(--radius);
  font-size: 14px; font-weight: 500; border: 1px solid var(--ink);
  transition: background .2s, color .2s, gap .3s var(--ease);
}
.btn:hover { gap: 14px; }
.btn-solid { background: var(--ink); color: var(--on-ink); }
.btn-solid:hover { background: transparent; color: var(--ink); }
.btn-line { border-color: var(--line-2); color: var(--ink); }
.btn-line:hover { border-color: var(--ink); }

/* ── 히어로 ───────────────────────────────────────────── */
.hero {
  position: relative; padding: 120px 0 0;
  /* 옅은 격자. 가장자리로 갈수록 사라진다 */
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 64px 64px;
  background-position: center top;
}
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(ellipse 80% 70% at 30% 30%, transparent 0%, var(--bg) 75%);
}
.hero > * { position: relative; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 64px; align-items: end; }

.kicker { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--ink-2); margin-bottom: 28px; }
.kicker a:hover { color: var(--ink); }
.live { width: 6px; height: 6px; border-radius: 50%; background: var(--ink); animation: blink 2s ease-in-out infinite; }
@keyframes blink { 50% { opacity: .2; } }

.hero h1 {
  font-size: clamp(48px, 8.4vw, 112px); font-weight: 700;
  line-height: 1.02; letter-spacing: -.045em;
}
.caret {
  display: inline-block; width: .08em; height: .82em; margin-left: .08em;
  background: var(--ink); vertical-align: -.04em; animation: caret 1.1s steps(1) infinite;
}
@keyframes caret { 50% { opacity: 0; } }
.hero-lead { max-width: 30em; margin-top: 36px; font-size: 17px; color: var(--ink-2); line-height: 1.75; }
.hero-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 40px; }

/* 리듬게임 레인: 헤어라인 네 줄에 노트가 떨어진다 */
.lanes { display: grid; gap: 12px; }
.lanes-label, .lanes-judge { font-size: 11px; color: var(--ink-3); text-transform: uppercase; letter-spacing: .14em; }
.lanes-judge { text-align: center; color: var(--ink); animation: judge 1.6s ease-in-out infinite; }
@keyframes judge { 50% { opacity: .25; } }
.lanes-track {
  position: relative; height: 340px; display: grid; grid-template-columns: repeat(4, 1fr);
  border-left: 1px solid var(--line-2);
}
.lane { position: relative; border-right: 1px solid var(--line-2); overflow: hidden; }
.lanes-track::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 36px; height: 1px; background: var(--ink);
}
.lane i {
  position: absolute; left: 18%; right: 18%; height: 4px; top: -8px;
  background: var(--ink); animation: note 2.6s linear infinite;
}
.lane:nth-child(1) i:nth-child(2) { animation-delay: -1.3s; }
.lane:nth-child(2) i { animation-delay: -.7s; opacity: .55; }
.lane:nth-child(2) i:nth-child(2) { animation-delay: -2s; }
.lane:nth-child(3) i { animation-delay: -1.7s; }
.lane:nth-child(3) i:nth-child(2) { animation-delay: -.3s; opacity: .55; }
.lane:nth-child(4) i { animation-delay: -1s; opacity: .55; }
.lane:nth-child(4) i:nth-child(2) { animation-delay: -2.3s; opacity: 1; }
@keyframes note { to { top: 100%; } }

.stats {
  display: grid; grid-template-columns: repeat(4, 1fr); margin: 120px 0 0;
  border-top: 1px solid var(--line);
}
.stats div { padding: 24px 0 28px; border-right: 1px solid var(--line); padding-left: 24px; }
.stats div:first-child { padding-left: 0; }
.stats div:last-child { border-right: 0; }
.stats dt { font-size: 11px; text-transform: uppercase; letter-spacing: .14em; color: var(--ink-3); }
.stats dd { margin: 6px 0 0; font-size: 40px; font-weight: 600; letter-spacing: -.04em; line-height: 1; font-variant-numeric: tabular-nums; }

/* ── 섹션 ─────────────────────────────────────────────── */
.section { padding: 120px 0 0; }
.section:last-of-type { padding-bottom: 140px; }
.section-flush { padding-top: 0; }
.sec-head {
  display: grid; grid-template-columns: 80px minmax(0, 1fr) auto; align-items: baseline; gap: 0 24px;
  padding-top: 20px; margin-bottom: 48px; border-top: 1px solid var(--ink);
}
.sec-no { font-size: 12px; color: var(--ink-3); }
.sec-head h2 { font-size: clamp(32px, 4.4vw, 56px); font-weight: 600; letter-spacing: -.04em; line-height: 1.05; }
.sec-head p { font-size: 14px; color: var(--ink-2); text-align: right; }
.empty { padding: 56px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); color: var(--ink-3); font-size: 13px; }
.more { margin-top: 48px; }

/* ── 작품 카드 ────────────────────────────────────────── */
.cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 56px 24px; }
.card a { display: block; }
.card-media {
  position: relative; aspect-ratio: 4 / 3; overflow: hidden;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  transition: border-color .3s;
}
.card-media img {
  width: 100%; height: 100%; object-fit: cover;
  filter: grayscale(1) contrast(1.05); transform: scale(1.001);
  transition: filter .5s var(--ease), transform .7s var(--ease);
}
.card a:hover .card-media { border-color: var(--ink); }
.card a:hover .card-media img { filter: none; transform: scale(1.04); }

/* 썸네일이 없을 때: 촘촘한 점 무늬 위에 기호 */
.ph {
  position: absolute; inset: 0; display: grid; place-items: center;
  background-image: radial-gradient(var(--line-2) 1px, transparent 1px);
  background-size: 14px 14px;
}
.ph-glyph {
  padding: 6px 12px; background: var(--surface); color: var(--ink-2);
  font-size: 18px; transition: color .3s, transform .5s var(--ease);
}
.card a:hover .ph-glyph { color: var(--ink); transform: scale(1.08); }

.card-meta {
  display: flex; justify-content: space-between; margin-top: 16px;
  font-size: 11px; text-transform: uppercase; letter-spacing: .1em; color: var(--ink-3);
}
.card-title {
  display: flex; justify-content: space-between; gap: 12px; margin-top: 8px;
  font-size: 20px; font-weight: 600; letter-spacing: -.025em; line-height: 1.35;
}
.card-title .arrow { flex: none; font-weight: 400; color: var(--ink-3); transition: transform .3s var(--ease), color .3s; }
.card a:hover .arrow { color: var(--ink); transform: translate(2px, -2px); }
.card-summary { margin-top: 6px; font-size: 14px; color: var(--ink-2); line-height: 1.6; }

/* ── 소품 목록 ────────────────────────────────────────── */
.rows { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.row { border-bottom: 1px solid var(--line); }
.row a {
  display: grid; grid-template-columns: 80px minmax(0, 1.1fr) minmax(0, 1.6fr) 80px 72px 24px;
  gap: 24px; align-items: baseline; padding: 22px 0;
  transition: padding .35s var(--ease), background .35s;
}
.row a:hover { padding-left: 12px; padding-right: 12px; background: var(--surface); }
.row-no, .row-tool, .row-date { font-size: 12px; color: var(--ink-3); }
.row-title { font-size: 18px; font-weight: 600; letter-spacing: -.02em; }
.row-summary { font-size: 14px; color: var(--ink-2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.row-arrow { color: var(--ink-3); transition: transform .3s var(--ease), color .3s; text-align: right; }
.row a:hover .row-arrow { color: var(--ink); transform: translateX(4px); }

/* ── 소개 ─────────────────────────────────────────────── */
.about-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 64px; padding-left: 104px; }
.statement { font-size: clamp(28px, 3.4vw, 44px); font-weight: 600; letter-spacing: -.04em; line-height: 1.25; }
.facts { margin: 0; border-top: 1px solid var(--line); }
.facts div { display: grid; grid-template-columns: 96px 1fr; gap: 16px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.facts dt { font-size: 11px; text-transform: uppercase; letter-spacing: .12em; color: var(--ink-3); padding-top: 4px; }
.facts dd { margin: 0; font-size: 15px; }

.tools { display: grid; grid-template-columns: 1fr 1fr; margin: 96px 0 0 104px; border-top: 1px solid var(--line); }
.tool { padding: 28px 32px 0 0; }
.tool + .tool { padding-left: 32px; border-left: 1px solid var(--line); }
.tool .mono { font-size: 11px; text-transform: uppercase; letter-spacing: .12em; }
.tool h3 { margin: 10px 0 10px; font-size: 28px; font-weight: 600; letter-spacing: -.03em; }
.tool p:last-child { color: var(--ink-2); font-size: 15px; }

/* ── 목록·상세 페이지 ─────────────────────────────────── */
.page-head { padding: 96px 0 56px; }
.page-head .kicker { margin-bottom: 20px; }
.page-head h1 { font-size: clamp(40px, 6.4vw, 88px); font-weight: 700; letter-spacing: -.045em; line-height: 1.05; }
.page-lead { margin-top: 20px; font-size: 17px; color: var(--ink-2); }

.filters { display: flex; flex-wrap: wrap; gap: 16px 48px; padding: 18px 0; margin-bottom: 56px; border-top: 1px solid var(--ink); border-bottom: 1px solid var(--line); }
.tabs { display: flex; align-items: baseline; gap: 20px; flex-wrap: wrap; }
.tabs-label { font-size: 11px; text-transform: uppercase; letter-spacing: .12em; color: var(--ink-3); margin-right: 4px; }
.tab { position: relative; font-size: 15px; color: var(--ink-3); transition: color .2s; }
.tab sup { margin-left: 3px; font-size: 10px; }
.tab:hover, .tab.is-on { color: var(--ink); }
.tab.is-on::after { content: ""; position: absolute; left: 0; right: 0; bottom: -4px; height: 1px; background: var(--ink); }

.detail-grid { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 48px; align-items: start; }
.stage {
  position: relative; aspect-ratio: 4 / 3; overflow: hidden;
  background: var(--surface); border: 1px solid var(--line-2); border-radius: var(--radius);
}
.stage iframe, .stage img { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; object-fit: contain; }
.stage .ph-glyph { font-size: 28px; }
.detail-side { position: sticky; top: 92px; }
.meta { margin: 0; border-top: 1px solid var(--ink); }
.meta div { display: grid; grid-template-columns: 72px 1fr; gap: 12px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.meta dt { font-size: 11px; text-transform: uppercase; letter-spacing: .12em; color: var(--ink-3); padding-top: 3px; }
.meta dd { margin: 0; font-size: 15px; }
.tags { display: flex; flex-wrap: wrap; gap: 4px 12px; color: var(--ink-2); }
.detail-actions { display: grid; gap: 8px; margin-top: 24px; }
.detail-actions .btn { justify-content: space-between; }
.detail-body { display: grid; gap: 40px; margin-top: 80px; }
.note { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 24px; padding-top: 20px; border-top: 1px solid var(--line); }
.note h2 { font-size: 11px; font-weight: 400; text-transform: uppercase; letter-spacing: .12em; color: var(--ink-3); padding-top: 5px; }
.note p { max-width: 40em; font-size: 16px; color: var(--ink-2); line-height: 1.85; }
.back { margin-top: 80px; margin-bottom: 140px; }
.back a { font-size: 13px; color: var(--ink-2); transition: color .2s; }
.back a:hover { color: var(--ink); }

/* ── 푸터 ─────────────────────────────────────────────── */
.site-footer { border-top: 1px solid var(--line); padding: 96px 0 40px; }
.footer-big { font-size: clamp(28px, 4.6vw, 60px); font-weight: 600; letter-spacing: -.04em; line-height: 1.15; }
.footer-big .mono { font-weight: 400; letter-spacing: -.02em; }
.footer-row {
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px 32px;
  margin-top: 80px; padding-top: 20px; border-top: 1px solid var(--line); font-size: 14px;
}
.footer-row .mono { font-size: 12px; }
.footer-row a { transition: opacity .2s; }
.footer-row a:hover { opacity: .6; }
.site-footer small { display: block; margin-top: 12px; font-size: 11px; color: var(--ink-3); }

/* ── 등장 효과 ────────────────────────────────────────── */
.js .reveal { opacity: 0; transform: translateY(20px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
.js .reveal.is-in { opacity: 1; transform: none; }

/* ── 반응형 ───────────────────────────────────────────── */
@media (max-width: 1080px) {
  .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .row a { grid-template-columns: 56px minmax(0, 1fr) 72px 64px 20px; }
  .row-summary { display: none; }
  .about-grid, .tools { padding-left: 0; margin-left: 0; }
}

@media (max-width: 820px) {
  .wrap { width: min(var(--wrap), 100% - 32px); }
  .header-inner { gap: 12px; }
  .menu-toggle {
    display: block; margin-left: auto; height: 32px; padding: 0 12px;
    border: 1px solid var(--line-2); border-radius: var(--radius);
    background: transparent; color: var(--ink); font-size: 12px; cursor: pointer;
  }
  .site-nav {
    display: none; position: absolute; top: 60px; left: 0; right: 0;
    flex-direction: column; gap: 0; padding: 8px 16px 20px;
    background: var(--bg); border-bottom: 1px solid var(--line);
  }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: 14px 0; font-size: 20px; color: var(--ink); border-bottom: 1px solid var(--line); }
  .site-nav a::after { display: none; }

  .hero { padding-top: 72px; }
  .hero-grid { grid-template-columns: 1fr; gap: 56px; }
  .lanes-track { height: 200px; }
  .stats { grid-template-columns: repeat(2, 1fr); margin-top: 72px; }
  .stats div { padding-left: 16px; }
  .stats div:nth-child(odd) { padding-left: 0; }
  .stats div:nth-child(2) { border-right: 0; }
  .stats div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }

  .section { padding-top: 88px; }
  .sec-head { grid-template-columns: 40px minmax(0, 1fr); margin-bottom: 36px; }
  .sec-head p { grid-column: 2; text-align: left; margin-top: 8px; }

  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .tools { grid-template-columns: 1fr; margin-top: 56px; }
  .tool { padding: 24px 0; }
  .tool + .tool { padding-left: 0; border-left: 0; border-top: 1px solid var(--line); }

  .detail-grid { grid-template-columns: 1fr; gap: 32px; }
  .detail-side { position: static; }
  .note { grid-template-columns: 1fr; gap: 8px; }
}

@media (max-width: 560px) {
  .cards { grid-template-columns: 1fr; gap: 44px; }
  .row a { grid-template-columns: 32px minmax(0, 1fr) 56px 16px; gap: 12px; }
  .row-date { display: none; }
  .row-title { font-size: 16px; }
  .br-sm { display: inline; }
  .footer-row { flex-direction: column; }
  .page-head { padding: 64px 0 40px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .lane i, .lanes-judge, .live, .caret { animation: none; }
  .lane i { top: 40%; }
  .lane i:nth-child(2) { top: 72%; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
}