@font-face {
  font-family: "Pretendard";
  src: url("fonts/PretendardVariable.woff2") format("woff2");
  font-weight: 45 920;
  font-display: swap;
}
/* 레이아웃: 첫 화면은 문구 + 직접 만지는 3D. 아래로 기능 묶음을 그림·체험과 번갈아 배치, 끝에 공통 하단.
   색: 앱 실제 화면과 같은 남색 바탕(#101B29), 버튼은 앱 렌더 버튼의 코랄, 브랜드 순간에만 아이콘의 코랄→복숭아 그라데이션,
   안내·라벨은 앱 앨범 버튼의 하늘빛. 앱과 같은 어두운 단일 테마. */
:root {
  color-scheme: dark;
  --bg: #0E1726;
  --bg-2: #122034;
  --panel: #172739;
  --stage: #0B131F;
  --line: rgba(168, 190, 228, 0.13);
  --line-2: rgba(168, 190, 228, 0.22);
  --text: #E9EEF6;
  --text-2: #A3B1C7;
  --text-3: #73839C;
  --accent: #FF6B5A;
  --accent-hover: #FF8172;
  --accent-ink: #1C0C0A;
  --peach: #FFA26B;
  --cool: #9DBBF0;
  --ok: #57C996;
  --warn: #F0B14A;
  --bad: #FF5D5D;
  --font-body: "Pretendard", "Apple SD Gothic Neo", "Malgun Gothic", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, Consolas, monospace;
  --wrap: 1160px;
  --ease: cubic-bezier(.2, .8, .2, 1);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 var(--font-body);
  -webkit-font-smoothing: antialiased;
  word-break: keep-all;
}
a { color: inherit; }
img { max-width: 100%; display: block; }
h1, h2, h3, h4 { margin: 0; text-wrap: balance; letter-spacing: -0.02em; }
p { margin: 0; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding-left: max(20px, env(safe-area-inset-left, 0px));
  padding-right: max(20px, env(safe-area-inset-right, 0px));
}
.label {
  font: 500 12px/1 var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cool);
}

/* ---------- 상단 */
body::before {
  content: ""; position: fixed; inset: 0 0 auto;
  height: env(safe-area-inset-top, 0px); z-index: 10; background: var(--bg);
}
.nav {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 9;
  background: color-mix(in srgb, var(--bg) 90%, transparent);
  border-bottom: 1px solid var(--line);
}
.nav .wrap { display: flex; align-items: center; gap: 26px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; text-decoration: none; letter-spacing: -0.01em; }
.brand-mark, .app-icon {
  background: center / contain no-repeat;
}
.brand-mark, .app-icon { background-image: url(img/app-icon.png); }
.brand-mark { width: 28px; height: 28px; }
.nav-links { display: flex; gap: 20px; font-size: 14px; color: var(--text-2); }
.nav-links a { text-decoration: none; }
.nav-links a:hover, .nav-links a[aria-current] { color: var(--text); }
.lang { display: flex; gap: 2px; padding: 3px; border: 1px solid var(--line); border-radius: 8px; font-size: 13px; margin-left: auto; }
.lang a { text-decoration: none; padding: 3px 9px; border-radius: 5px; color: var(--text-2); }
.lang a[aria-current] { background: rgba(255,255,255,0.08); color: var(--text); }
@media (max-width: 900px) { .nav-links { display: none; } .nav .wrap { gap: 12px; } }
@media (max-width: 420px) { .nav .btn-sm { display: none; } }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 18px; border-radius: 10px;
  font-weight: 600; font-size: 15px; text-decoration: none; white-space: nowrap;
  transition: transform .2s var(--ease), background .2s;
}
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { transform: translateY(-1px); background: var(--accent-hover); }
.btn-ghost { border: 1px solid var(--line-2); color: var(--text); }
.btn-ghost:hover { border-color: var(--text-3); }
.btn-sm { padding: 7px 14px; font-size: 14px; }

/* ---------- 히어로 */
.hero { padding-block: 56px 32px; overflow: hidden; }
.hero .wrap { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 36px; align-items: center; }
.app-id { display: flex; align-items: center; gap: 14px; color: var(--text-2); font-size: 14px; line-height: 1.45; }
.app-id strong { color: var(--text); font-size: 16px; }
.app-icon { width: 52px; height: 52px; flex: none; }
.hero h1 { margin-top: 20px; font-size: clamp(34px, 4.8vw, 56px); line-height: 1.16; font-weight: 800; }
.hero h1 em {
  font-style: normal;
  background: linear-gradient(90deg, var(--accent), var(--peach));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero .lede { margin-top: 20px; color: var(--text-2); font-size: 17.5px; max-width: 31em; }
.ctas { margin-top: 28px; display: flex; flex-wrap: wrap; gap: 12px; }
.hero .meta { margin-top: 16px; font: 13px/1.6 var(--font-mono); color: var(--text-3); }
@media (max-width: 900px) { .hero .wrap { grid-template-columns: 1fr; } .hero { padding-block: 36px 16px; } }

/* ---------- 3D 체험 */
.demo { display: grid; gap: 12px; min-width: 0; }
.demo-stage {
  position: relative; width: 100%; aspect-ratio: 1 / 0.86; border-radius: 20px; overflow: hidden;
  background: radial-gradient(ellipse 65% 55% at 50% 52%, #24354F 0%, #142133 55%, var(--stage) 100%);
  border: 1px solid var(--line);
}
.demo canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; opacity: 0; transition: opacity .6s var(--ease); }
.demo.demo-ready canvas { opacity: 1; }
.demo-fallback { position: absolute; inset: 8%; width: 84%; height: 84%; object-fit: contain; border-radius: 14px; transition: opacity .4s; }
.demo.demo-ready .demo-fallback { opacity: 0; pointer-events: none; }
.demo-part { position: absolute; top: 14px; left: 16px; right: 16px; font: 13px var(--font-mono); color: var(--text-2); pointer-events: none; }
.demo.is-touch .demo-part { color: var(--peach); }
.demo-tip { position: absolute; bottom: 12px; left: 0; right: 0; text-align: center; font: 12px var(--font-mono); color: var(--text-3); pointer-events: none; }
.demo-bar { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 10px; }
.demo:not(.demo-ready) .demo-bar { opacity: .4; pointer-events: none; }
.seg { display: inline-flex; padding: 3px; gap: 2px; border-radius: 10px; background: var(--bg-2); border: 1px solid var(--line); }
.seg button, .chip {
  border: 0; border-radius: 7px; padding: 6px 11px; font: 600 13px var(--font-body); white-space: nowrap;
  cursor: pointer; background: transparent; color: var(--text-2);
}
.seg button:hover, .chip:hover { color: var(--text); }
.seg button[aria-pressed="true"] { background: rgba(255,255,255,0.09); color: var(--text); }
.chip { border: 1px solid var(--line); background: var(--bg-2); padding: 7px 12px; border-radius: 10px; }
.chip[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.demo-bar input[type=range] { flex: 1 1 120px; min-width: 100px; accent-color: var(--accent); }
.demo-bar input:disabled { opacity: .35; }

/* ---------- 지원 형식 띠 */
.formats { border-block: 1px solid var(--line); background: var(--bg-2); }
.formats .wrap { display: flex; flex-wrap: wrap; gap: 10px 28px; padding-block: 18px; align-items: baseline; }
.formats .label { color: var(--text-3); }
.fmt { display: flex; align-items: baseline; gap: 7px; font-weight: 600; font-size: 15px; }
.fmt small { font: 12px var(--font-mono); color: var(--text-3); font-weight: 400; }

/* ---------- 섹션 */
.section { padding-block: 88px; }
.section-head { max-width: 680px; display: grid; gap: 14px; margin-bottom: 48px; }
.section-head h2, .page-title { font-size: clamp(27px, 3.4vw, 38px); line-height: 1.25; font-weight: 750; }
.section-head p { color: var(--text-2); font-size: 17px; }

/* 기능 한눈에 */
.overview { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.overview a {
  display: grid; gap: 6px; align-content: start; padding: 22px; border-radius: 14px; text-decoration: none;
  background: var(--panel); border: 1px solid var(--line); transition: border-color .2s, transform .2s var(--ease);
}
.overview a:hover { border-color: var(--line-2); transform: translateY(-2px); }
.overview h3 { font-size: 17px; display: flex; align-items: center; gap: 10px; }
.overview h3 i { width: 9px; height: 9px; border-radius: 3px; background: var(--dot, var(--cool)); flex: none; }
.overview p { color: var(--text-2); font-size: 14.5px; }
@media (max-width: 860px) { .overview { grid-template-columns: 1fr; } }

/* 기능 블록 */
.feature { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 48px; align-items: center; }
.feature.flip { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }
.feature.flip .feature-media { order: 2; }
.feature-text { display: grid; gap: 14px; min-width: 0; }
.feature-text h3 { font-size: 26px; line-height: 1.3; font-weight: 700; }
.feature-text > p { color: var(--text-2); max-width: 34em; }
.ticks { margin: 4px 0 0; padding: 0; list-style: none; display: grid; gap: 8px; }
.ticks li { display: flex; gap: 10px; font-size: 15px; }
.ticks li::before { content: ""; flex: none; width: 6px; height: 6px; margin-top: 10px; border-radius: 2px; background: var(--peach); }
.ticks b { font-weight: 650; }
.hint { font-size: 14px; color: var(--cool); }
@media (max-width: 860px) {
  .feature, .feature.flip { grid-template-columns: 1fr; gap: 24px; }
  .feature.flip .feature-media { order: 0; }
}
.frame { background: var(--panel); border: 1px solid var(--line); border-radius: 16px; overflow: hidden; min-width: 0; }
.shot { margin: 0; position: relative; }
.shot img { width: 100%; height: auto; }
.shot figcaption { padding: 10px 14px; font: 12px/1.5 var(--font-mono); color: var(--text-3); border-top: 1px solid var(--line); }

/* 분해·조립 카드 3장 */
.subgrid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.subgrid > div { padding: 22px; border-radius: 14px; background: var(--panel); border: 1px solid var(--line); display: grid; gap: 8px; align-content: start; }
.subgrid h4 { font-size: 17px; }
.subgrid p { color: var(--text-2); font-size: 14.5px; }
.kbd { font: 500 12px var(--font-mono); padding: 1px 6px; border-radius: 5px; border: 1px solid var(--line-2); color: var(--text); white-space: nowrap; }
@media (max-width: 860px) { .subgrid { grid-template-columns: 1fr; } }

/* 간섭 그림 */
.fit { padding: 18px; display: grid; gap: 14px; }
.fit svg { width: 100%; height: auto; display: block; }
.fit .housing { fill: #3A4C66; transition: transform .6s var(--ease); }
.fit .pin { fill: #9DBBF0; }
.fit .clash { fill: var(--bad); transition: opacity .3s; }
.fit .gapfill { fill: var(--ok); opacity: 0; transition: opacity .4s .3s; }
.fit .cap { font: 12px var(--font-mono); fill: var(--text-2); }
.fit.fixed .clash { opacity: 0; }
.fit.fixed .gapfill { opacity: .55; }
.fit-bar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.legend { display: flex; flex-wrap: wrap; gap: 6px 16px; font-size: 13.5px; color: var(--text-2); }
.legend span { display: inline-flex; align-items: center; gap: 7px; }
.legend i { width: 10px; height: 10px; border-radius: 3px; }

/* 렌더 탭 */
.tabs { display: flex; gap: 4px; padding: 8px; border-bottom: 1px solid var(--line); overflow-x: auto; }
.tabs button { flex: none; padding: 7px 12px; border: 0; border-radius: 8px; cursor: pointer; background: transparent; color: var(--text-2); font: 600 13.5px var(--font-body); white-space: nowrap; }
.tabs button[aria-selected="true"] { background: rgba(255,255,255,0.08); color: var(--text); }
.tab-view { position: relative; aspect-ratio: 1232 / 694; background: #000; }
.tab-view img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; transition: opacity .4s var(--ease); }
.tab-view img.on { opacity: 1; }
.render-wide { margin-top: 40px; }

/* 작은 기능 묶음 */
.more { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 16px; overflow: hidden; }
.more > div { background: var(--bg); padding: 26px; display: grid; gap: 8px; align-content: start; }
.more h4 { font-size: 17px; }
.more p { color: var(--text-2); font-size: 15px; }
@media (max-width: 860px) { .more { grid-template-columns: 1fr; } }

/* 시작하기 */
.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; counter-reset: s; list-style: none; padding: 0; margin: 0; }
.steps li { counter-increment: s; border-top: 2px solid var(--line); padding-top: 20px; display: grid; gap: 8px; }
.steps li::before { content: counter(s, decimal-leading-zero); font: 500 13px var(--font-mono); color: var(--accent); }
.steps h4 { font-size: 18px; }
.steps p { color: var(--text-2); font-size: 15px; }
@media (max-width: 760px) { .steps { grid-template-columns: 1fr; } }

/* 공통 하단 */
.band { background: var(--bg-2); border-block: 1px solid var(--line); }
.dl-icon { display: block; width: 72px; height: 72px; margin-bottom: 20px; }
.download .wrap { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 48px; align-items: start; }
.specs { display: grid; grid-template-columns: max-content 1fr; gap: 10px 24px; margin: 0; font-size: 15px; }
.specs dt { color: var(--text-3); font: 13px/1.9 var(--font-mono); }
.specs dd { margin: 0; }
.specs a { color: var(--accent); }
@media (max-width: 860px) { .download .wrap { grid-template-columns: 1fr; } }
.support { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 40px; align-items: center; }
.support-actions { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.qr { margin: 0; display: grid; gap: 6px; justify-items: center; color: var(--text-3); font-size: 12px; }
.kakao-pay { display: none; background: #FEE500; color: #191600; font-weight: 700; }
.kakao-pay:hover { background: #FFEB3B; color: #191600; }
@media (max-width: 820px) { .kakao-pay { display: inline-flex; } .support-actions .qr { display: none; } }
.qr img { width: 120px; height: 120px; border-radius: 10px; background: #fff; padding: 6px; }
.mail { display: inline-flex; align-items: center; gap: 8px; font: 15px var(--font-mono); }
.mail button { background: transparent; border: 1px solid var(--line); color: var(--text-2); border-radius: 6px; padding: 3px 8px; font: 12px var(--font-body); cursor: pointer; }
@media (max-width: 760px) { .support { grid-template-columns: 1fr; } }
footer { border-top: 1px solid var(--line); padding-block: 32px; color: var(--text-3); font-size: 14px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 12px 28px; }
footer a { text-decoration: none; }
footer a:hover { color: var(--text); }
.others { margin-left: auto; display: inline-flex; align-items: center; gap: 10px; }
.other-app { display: inline-flex; align-items: center; gap: 6px; color: var(--text-2); }
.other-app img { border-radius: 4px; }

/* 이용 조건 */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 14px; }
table { width: 100%; border-collapse: collapse; font-size: 15px; min-width: 560px; }
th, td { text-align: left; padding: 14px 18px; border-bottom: 1px solid var(--line); vertical-align: top; }
tr:last-child td { border-bottom: 0; }
th { font: 500 12px var(--font-mono); letter-spacing: .06em; color: var(--text-3); text-transform: uppercase; background: var(--bg-2); }
.pill { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 13px; font-weight: 600; white-space: nowrap; }
.pill.free { background: rgba(87,201,150,.14); color: #77DDAE; }
.pill.ask { background: rgba(240,177,74,.14); color: var(--warn); }
.pill.no { background: rgba(255,93,93,.14); color: #FF8A8A; }
.qa { margin: 40px 0 0; display: grid; gap: 6px 0; max-width: 46em; }
.qa dt { font-weight: 650; margin-top: 18px; }
.qa dd { margin: 0; color: var(--text-2); }

@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }

.mf-inline-1{margin-top:28px}