/* ══════════════════════════════════════════════════════════════════════
   Studio Canvas — 브랜드 사이트

   페이지 전체가 하나의 어두운 면이다. 첫 화면에서 흰 문서로 떨어지지 않는다.
   헤어라인·작은 라벨·번호 매기기를 쓰지 않는다 — 그게 문서처럼 보이게 만든다.
   화면을 채우는 것은 큰 글자와 제품 그림뿐이다.

   제품 설명은 이 페이지가 하지 않는다. Aurora 의 소개·기능·설치·FAQ 는
   전부 aurora.html 안에 있다. 여기는 입구다.
   ══════════════════════════════════════════════════════════════════════ */

@font-face {
  font-family: 'Pretendard';
  src: url('fonts/Pretendard-Regular.woff2') format('woff2');
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: 'Pretendard';
  src: url('fonts/Pretendard-Bold.woff2') format('woff2');
  font-weight: 700;
  font-display: swap;
}

:root {
  --bg:     #08080a;
  --bg-2:   #121215;
  --fg:     #ffffff;
  --fg-2:   #97979e;
  --fg-3:   #55555c;
  --dim:    #2e2e33;
  --line:   rgba(255, 255, 255, 0.11);

  --sans: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI',
          'Apple SD Gothic Neo', 'Malgun Gothic', system-ui, sans-serif;

  --gut: clamp(18px, 4vw, 60px);
  --ease: cubic-bezier(0.22, 0.72, 0.2, 1);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; background: var(--bg); }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  letter-spacing: -0.014em;
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; }

::selection { background: var(--fg); color: var(--bg); }
:focus-visible { outline: 2px solid currentColor; outline-offset: 4px; }

.wrap {
  width: 100%;
  max-width: 1720px;
  margin: 0 auto;
  padding-inline: var(--gut);
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 300;
  background: var(--fg); color: var(--bg); padding: 12px 18px; font-size: 13px;
}
.skip-link:focus { left: 12px; top: 12px; }

/* ══ 헤더 ═══════════════════════════════════════════════════════ */

.head {
  position: fixed; inset: 0 0 auto 0; z-index: 200;
  transition: background 0.5s var(--ease);
}
.head.stuck { background: rgba(8, 8, 10, 0.92); }
.head-in {
  height: 66px; display: flex; align-items: center;
  justify-content: space-between; gap: 20px;
}
.head-mark {
  display: inline-flex; align-items: center; gap: 9px;
  font-weight: 700; font-size: 13px; letter-spacing: -0.01em;
  white-space: nowrap;
}
.head-mark i {
  width: 9px; height: 9px; background: currentColor;
  transition: transform 0.45s var(--ease);
}
.head-mark:hover i { transform: rotate(45deg); }

.nav { display: flex; align-items: center; gap: clamp(16px, 2vw, 32px); }
.nav a { font-size: 14px; color: var(--fg-2); transition: color 0.25s var(--ease); }
.nav a:hover { color: var(--fg); }
.nav .nav-cta {
  color: var(--bg); background: var(--fg);
  padding: 10px 20px; font-size: 13.5px; font-weight: 700;
  transition: opacity 0.25s var(--ease), transform 0.25s var(--ease);
}
.nav .nav-cta:hover { color: var(--bg); opacity: 0.86; transform: translateY(-1px); }
@media (max-width: 560px) { .nav a.opt { display: none; } }

.prog {
  position: fixed; top: 0; left: 0; height: 2px; z-index: 210;
  width: 100%; transform: scaleX(0); transform-origin: left;
  background: var(--fg); opacity: 0;
  transition: opacity 0.35s var(--ease);
}
.prog.on { opacity: 0.85; }

/* ══ 1. 첫 화면 — 글자 안에서 번지는 유체 ══════════════════════ */

.hero {
  position: relative;
  min-height: 100svh;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  padding: 100px var(--gut) 190px;
  text-align: center;
}
@supports not (min-height: 100svh) { .hero { min-height: 100vh; } }

.fluid {
  display: block;
  width: 100%;
  max-width: 1500px;
  height: clamp(230px, 50vh, 580px);
  touch-action: none;
  opacity: 0;
  transition: opacity 1.2s var(--ease) 0.15s;
}
body.ready .fluid { opacity: 1; }

/* WebGL 이 없으면 유체 대신 그냥 글자가 선다 */
.fluid-fallback {
  margin: 0;
  font-weight: 700;
  font-size: clamp(40px, 11.5vw, 200px);
  line-height: 0.94;
  letter-spacing: -0.035em;
  text-transform: uppercase;
}

.hero-tag {
  margin: clamp(8px, 1.6vh, 22px) auto 0;
  max-width: 40ch;
  font-size: clamp(14px, 1.15vw, 18px);
  color: rgba(255, 255, 255, 0.6);
  opacity: 0; transform: translateY(16px);
  transition: opacity 1s var(--ease) 0.6s, transform 1s var(--ease) 0.6s;
}
body.ready .hero-tag { opacity: 1; transform: none; }

/* 스크롤 표시 — 첫 화면과 선언 화면이 같은 부품을 쓴다 */
.cue {
  position: absolute; z-index: 3;
  left: 50%; bottom: clamp(26px, 5vh, 60px);
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 13px;
  color: rgba(255, 255, 255, 0.72);
  transition: color 0.3s var(--ease);
}
.cue:hover { color: #fff; }

.hero-cue {
  opacity: 0;
  transition: opacity 1s var(--ease) 0.9s, color 0.3s var(--ease);
}
body.ready .hero-cue { opacity: 1; }

.cue-ring {
  width: clamp(58px, 5.6vw, 80px);
  height: clamp(58px, 5.6vw, 80px);
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.28);
  display: grid; place-items: center;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease),
              transform 0.4s var(--ease);
}
.cue:hover .cue-ring {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(3px);
}
.cue-ring svg {
  width: 40%; height: 40%;
  fill: none; stroke: currentColor; stroke-width: 1.5;
  stroke-linecap: round; stroke-linejoin: round;
  animation: nudge 2.4s var(--ease) infinite;
}
@keyframes nudge {
  0%, 100% { transform: translateY(-14%); opacity: 0.55; }
  50%      { transform: translateY(14%);  opacity: 1; }
}

.cue-label { font-size: 12.5px; letter-spacing: 0.16em; }
.hero-cue .cue-label { letter-spacing: 0.22em; text-transform: uppercase; }

/* ══ 2. 선언 — 스크롤에 맞춰 단어가 켜진다 ════════════════════ */

.say { position: relative; height: 190svh; }
@supports not (height: 100svh) { .say { height: 190vh; } }

.say-sticky {
  position: sticky; top: 0;
  height: 100svh; min-height: 520px;
  display: flex; align-items: center;
  padding-inline: var(--gut);
}
/* 이 화면에도 다음으로 갈 길이 보여야 한다 */
.say-cue { bottom: clamp(24px, 4.5vh, 54px); }
@media (max-height: 720px) { .say-cue .cue-label { display: none; } }
.say-in { width: 100%; max-width: 1720px; margin: 0 auto; }

/* 문장을 물감으로 칠할 때 쓰는 캔버스 */
.say-fluid {
  display: none;
  width: 100%;
  /* 글자 크기가 폭에 따라 정해지므로 높이도 폭을 따라간다 */
  height: clamp(100px, 16vw, 290px);
  touch-action: none;
}
.say.paint .say-fluid { display: block; }
.say.paint .say-text {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap;
}

.say-text {
  margin: 0;
  font-weight: 700;
  /* 한 문장이 한 줄에 들어가는 크기 — 두 줄을 각각 통으로 읽히게 한다 */
  font-size: clamp(25px, 5.3vw, 92px);
  line-height: 1.12;
  letter-spacing: -0.045em;
  max-width: 22ch;
}
.say-text .line { display: block; }
.say-text .w { color: var(--dim); transition: color 0.4s linear; }
.say-text .w.lit { color: var(--fg); }

.say-note {
  margin: clamp(24px, 3.6vh, 46px) 0 0;
  max-width: 48ch;
  font-size: clamp(15px, 1.3vw, 21px);
  line-height: 1.62;
  letter-spacing: -0.02em;
  color: #a6a6ad;
  opacity: 0; transform: translateY(16px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}
.say-note.lit { opacity: 1; transform: none; }

.vals {
  display: flex; flex-wrap: wrap;
  gap: clamp(20px, 4vw, 72px);
  margin: clamp(30px, 5vh, 62px) 0 0;
}
.vals div {
  opacity: 0; transform: translateY(16px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
  transition-delay: var(--d, 0ms);
}
.vals div.lit { opacity: 1; transform: none; }
.vals b {
  display: block;
  font-size: clamp(18px, 1.9vw, 30px);
  font-weight: 700; letter-spacing: -0.035em; line-height: 1.2;
}
.vals span {
  display: block; margin-top: 4px;
  font-size: 13px; color: var(--fg-3); letter-spacing: 0;
}

/* ══ 3. 흐르는 띠 ═════════════════════════════════════════════ */

.ticker {
  overflow: hidden;
  padding-block: clamp(26px, 4vh, 54px);
  user-select: none;
}
.ticker-in { display: flex; width: max-content; animation: slide 44s linear infinite; }
.ticker span {
  display: block;
  padding-right: clamp(28px, 4vw, 70px);
  font-weight: 700;
  font-size: clamp(30px, 5.4vw, 92px);
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--dim);
  white-space: nowrap;
}
.ticker span em { font-style: normal; color: var(--fg-3); }
@keyframes slide { to { transform: translateX(-50%); } }

/* ══ 4. 제품 그리드 ═══════════════════════════════════════════ */

.work { padding-bottom: 0; }

.work-bar {
  display: flex; flex-wrap: wrap; align-items: center;
  justify-content: space-between; gap: 14px 28px;
  padding-block: clamp(14px, 2vh, 24px);
  margin-bottom: clamp(18px, 2.6vh, 30px);
  position: sticky; top: 66px; z-index: 50;
  background: var(--bg);
}
.work-title {
  margin: 0; font-weight: 700;
  font-size: clamp(24px, 3vw, 46px);
  letter-spacing: -0.04em; line-height: 1;
}
.work-title em {
  font-style: normal; color: var(--fg-3);
  font-size: 0.42em; vertical-align: super; margin-left: 10px;
  letter-spacing: -0.02em;
}

.filters { display: flex; flex-wrap: wrap; gap: 6px; }
.filters button {
  border: 0;
  background: rgba(255, 255, 255, 0.07);
  color: var(--fg-2);
  padding: 9px 18px;
  border-radius: 999px;
  font-size: 13px; letter-spacing: -0.01em;
  cursor: pointer;
  transition: background 0.25s var(--ease), color 0.25s var(--ease);
}
.filters button:hover { background: rgba(255, 255, 255, 0.14); color: var(--fg); }
.filters button[aria-pressed="true"] { background: var(--fg); color: var(--bg); font-weight: 700; }

.grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(20px, 2.2vw, 38px) clamp(16px, 1.5vw, 28px);
  align-items: start;
}
@media (max-width: 1180px) { .grid { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (max-width: 760px)  { .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

.card {
  display: block;
  opacity: 0; transform: translateY(30px);
  transition: opacity 0.75s var(--ease), transform 0.75s var(--ease);
  transition-delay: var(--d, 0ms);
}
.card.in { opacity: 1; transform: none; }
.card.hide { display: none; }

.card-vis {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: 14px;
  background: var(--bg-2);
}
.card-vis img {
  width: 100%; height: 100%; object-fit: cover; object-position: top left;
  transition: transform 0.8s var(--ease);
}
.card:hover .card-vis img { transform: scale(1.05); }
.card-vis::after {
  content: '';
  position: absolute; inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.1);
  transition: box-shadow 0.4s var(--ease);
  pointer-events: none;
}
.card:hover .card-vis::after { box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.5); }

/* 아직 안 나온 칸 — 흰 판에 검은 글씨, 그게 전부 */
.card-vis.coming {
  background: #ffffff;
  color: #0b0b0b;
  display: grid; place-items: center;
}
.card-vis.coming span {
  font-size: clamp(14px, 1.35vw, 21px);
  font-weight: 700;
  letter-spacing: -0.025em;
}
.card.soon .card-vis::after { box-shadow: none; }

.card-badge {
  position: absolute; right: 12px; top: 12px; z-index: 2;
  background: var(--bg); color: var(--fg);
  font-size: 11px; font-weight: 700; letter-spacing: -0.01em;
  padding: 6px 12px; line-height: 1.4;
  border-radius: 999px;
}

.card-foot { padding-top: 15px; }
.card-name {
  margin: 0;
  font-size: clamp(19px, 1.6vw, 25px);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.15;
}
.card-tags { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 10px; }
.card-tags span {
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--fg-2);
  padding: 4px 11px;
  font-size: 11.5px;
  letter-spacing: -0.01em;
  transition: background 0.25s var(--ease), color 0.25s var(--ease);
}
.card:hover .card-tags span { background: rgba(255, 255, 255, 0.14); color: var(--fg); }
.card-meta {
  display: block; margin-top: 9px;
  font-size: 12.5px; color: var(--fg-3);
  transition: color 0.25s var(--ease);
}
.card:hover .card-meta { color: var(--fg-2); }

/* ══ 5. 닫는 말 ═══════════════════════════════════════════════ */

.end { padding-block: clamp(110px, 20vh, 260px) clamp(28px, 4vh, 44px); }
.end h2 {
  margin: 0 0 clamp(16px, 2.2vh, 26px);
  font-weight: 700;
  font-size: clamp(30px, 5.6vw, 96px);
  line-height: 1.05;
  letter-spacing: -0.045em;
  max-width: 13ch;
}
.end-sub {
  margin: 0 0 clamp(26px, 4vh, 48px);
  font-size: clamp(16px, 1.5vw, 24px);
  letter-spacing: -0.025em;
  color: var(--fg-2);
}

.end-link {
  display: inline-block;
  font-weight: 700;
  font-size: clamp(17px, 2.3vw, 36px);
  letter-spacing: -0.035em;
  color: var(--fg-2);
  background-image: linear-gradient(#fff, #fff);
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 0% 2px;
  transition: background-size 0.55s var(--ease), color 0.35s var(--ease);
  word-break: break-all;
}
.end-link:hover { background-size: 100% 2px; color: var(--fg); }

.foot {
  margin-top: clamp(60px, 9vh, 110px);
  padding-top: 24px;
  border-top: 1px solid var(--line);
  display: flex; flex-wrap: wrap; gap: 12px 36px;
  align-items: center; justify-content: space-between;
  font-size: 12.5px; color: var(--fg-3);
}
.foot-links { display: flex; flex-wrap: wrap; gap: 22px; }
.foot a { transition: color 0.25s var(--ease); }
.foot a:hover { color: var(--fg); }

/* ══ 모션을 끈 경우 ═══════════════════════════════════════════ */

@media (prefers-reduced-motion: reduce) {
  .fluid, .hero-tag, .hero-cue, .card, .say-note, .vals div {
    opacity: 1 !important; transform: none !important; transition: none !important;
  }
  .say-text .w { color: var(--fg); }
  .cue-ring svg { animation: none; }
  .ticker-in { animation: none; }
  .card-vis img { transition: none; }
}