styles.css

:root {
  color-scheme: light;
  --brand: #0064ff;
  --violet: #7c3aed;
  --ink: #081224;
  --muted: #64748b;
  --line: #e7edf6;
  --soft: #f5f8fd;
  --success: #00b87a;
  font-family: "Noto Sans KR", "Inter", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: #fff; overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.section-shell { width: min(1180px, calc(100% - 48px)); margin-inline: auto; }

.site-header {
  position: sticky; top: 0; z-index: 50; height: 76px; display: grid;
  grid-template-columns: 1fr auto 1fr; align-items: center; padding: 0 max(28px, calc((100vw - 1180px) / 2));
  border-bottom: 1px solid rgba(226,232,240,.8); background: rgba(255,255,255,.88); backdrop-filter: blur(18px);
}
.brand { display: inline-flex; align-items: baseline; width: max-content; letter-spacing: -.05em; font: 800 21px/1 "Inter", sans-serif; }
.brand strong { color: var(--brand); }
.site-header nav { display: flex; gap: 34px; color: #536078; font-size: 14px; font-weight: 700; }
.site-header nav a { transition: color .2s; }
.site-header nav a:hover { color: var(--brand); }
.header-actions { justify-self:end; display:flex; align-items:center; gap:12px; }
.language-switch { display:flex; align-items:center; padding:3px; border:1px solid #dfe6f1; border-radius:10px; background:#f6f8fc; }
.language-switch button { min-width:42px; height:30px; padding:0 8px; border:0; color:#8a97aa; border-radius:7px; background:transparent; font:800 9px/1 "Inter",sans-serif; letter-spacing:.04em; cursor:pointer; transition:.2s; }
.language-switch button.active { color:#075fe8; background:#fff; box-shadow:0 2px 8px rgba(15,23,42,.09); }
.header-cta { justify-self: end; padding: 12px 18px; color: white; border-radius: 12px; font-size: 13px; font-weight: 800; background: linear-gradient(135deg,var(--brand),var(--violet)); box-shadow: 0 8px 22px rgba(0,100,255,.2); }
.menu-button { display: none; }

.hero { min-height: 760px; display: grid; grid-template-columns: .86fr 1.14fr; align-items: center; gap: 40px; padding-block: 80px 72px; }
.eyebrow { margin: 0 0 20px; color: var(--brand); font: 800 12px/1.2 "Inter",sans-serif; letter-spacing: .19em; }
.hero h1 { margin: 0; font-size: clamp(54px,5vw,78px); line-height: 1.12; letter-spacing: -.065em; font-weight: 900; }
.hero h1 span { color: transparent; background: linear-gradient(90deg,var(--brand),var(--violet)); background-clip: text; }
.hero-description { max-width: 540px; margin: 28px 0 0; color: var(--muted); font-size: 17px; line-height: 1.85; letter-spacing: -.02em; }
.hero-actions { display: flex; gap: 12px; margin-top: 34px; }
.primary-button,.secondary-button,.white-button,.ghost-button { display:inline-flex; align-items:center; justify-content:center; min-height:54px; padding:0 24px; border-radius:14px; font-size:14px; font-weight:800; transition:transform .2s,box-shadow .2s; }
.primary-button { color:#fff; background:linear-gradient(135deg,var(--brand),var(--violet)); box-shadow:0 12px 28px rgba(64,75,235,.25); }
.secondary-button { border:1px solid #dfe6f1; background:#fff; box-shadow:0 5px 16px rgba(15,23,42,.06); }
.primary-button:hover,.secondary-button:hover,.white-button:hover { transform:translateY(-2px); }
.hero-points { display:flex; flex-wrap:wrap; gap:20px; margin:24px 0 0; padding:0; list-style:none; color:#8290a6; font-size:12px; font-weight:700; }
.hero-points li::before { content:"✓"; display:inline-grid; place-items:center; width:17px; height:17px; margin-right:7px; border:1px solid #5ad7ad; color:#00a96e; border-radius:50%; font-size:10px; }
.hero-visual { position:relative; }
.hero-visual img { position:relative; z-index:2; display:block; width:100%; border-radius:4px; box-shadow:0 34px 80px rgba(30,73,163,.16); }
.visual-halo { position:absolute; inset:5% 0 -2% 6%; background:radial-gradient(circle at 65% 42%,rgba(0,100,255,.18),transparent 49%),radial-gradient(circle at 45% 75%,rgba(124,58,237,.17),transparent 45%); filter:blur(24px); }
.floating-tag { position:absolute; z-index:3; padding:10px 14px; color:#fff; border-radius:12px; font-size:12px; font-weight:800; box-shadow:0 14px 32px rgba(18,36,79,.22); }
.tag-analysis { left:-4%; top:47%; background:linear-gradient(135deg,var(--brand),#3e72ff); }
.tag-verified { right:-3%; top:20%; background:linear-gradient(135deg,#00bd7d,#00a06c); }

.process-strip { width:min(1080px,calc(100% - 48px)); margin:0 auto 150px; display:grid; grid-template-columns:1fr auto 1fr auto 1fr auto 1fr; align-items:center; padding:28px 34px; border:1px solid var(--line); border-radius:22px; box-shadow:0 16px 45px rgba(30,52,95,.07); }
.process-strip div { display:grid; grid-template-columns:auto 1fr; column-gap:11px; align-items:center; }
.process-strip div>span { grid-row:1/3; color:#b4c0d2; font:800 12px "Inter"; }
.process-strip strong { font-size:15px; }
.process-strip small { color:#94a3b8; font-size:11px; margin-top:3px; }
.process-strip i { color:#c9d4e5; font-style:normal; }

.brand-film { position:relative; width:100%; min-height:min(76vw,860px); margin:0 0 155px; color:#fff; background:#dbe7f8; overflow:hidden; }
.brand-film-video { position:absolute; inset:0; width:100%; height:100%; object-fit:cover; }
.brand-film-shade { position:absolute; inset:0; background:linear-gradient(90deg,rgba(4,13,31,.66) 0%,rgba(4,13,31,.32) 42%,rgba(4,13,31,.04) 72%),linear-gradient(0deg,rgba(5,17,39,.35),transparent 46%); }
.brand-film-copy { position:absolute; z-index:2; left:max(32px,calc((100vw - 1180px)/2)); bottom:11%; max-width:660px; }
.brand-film-copy p { margin:0 0 20px; color:#dce8ff; font:800 11px/1 "Inter",sans-serif; letter-spacing:.2em; }
.brand-film-copy h2 { margin:0; font-size:clamp(42px,5vw,72px); line-height:1.18; letter-spacing:-.06em; text-shadow:0 5px 24px rgba(0,0,0,.22); }
.brand-film-copy>span { display:block; margin-top:20px; color:#eef4ff; font-size:15px; font-weight:600; }
.sound-toggle { position:absolute; z-index:3; right:max(28px,calc((100vw - 1180px)/2)); bottom:9%; display:flex; align-items:center; gap:8px; height:44px; padding:0 15px; border:1px solid rgba(255,255,255,.45); color:#fff; border-radius:99px; background:rgba(255,255,255,.13); backdrop-filter:blur(12px); cursor:pointer; }
.sound-toggle span { font-size:17px; }.sound-toggle b{font:700 10px "Inter",sans-serif;text-transform:uppercase;letter-spacing:.08em}
.sound-toggle[aria-pressed="true"] { color:#075fe8; border-color:#fff; background:#fff; }

.section-heading { max-width:650px; }
.section-heading h2 { margin:0; font-size:clamp(38px,4vw,58px); line-height:1.2; letter-spacing:-.055em; font-weight:900; }
.section-heading>p:last-child { margin:22px 0 0; color:var(--muted); line-height:1.8; }
.product-section { padding-bottom:160px; }
.feature-stage { display:grid; grid-template-columns:300px 1fr; gap:34px; margin-top:60px; }
.feature-nav { display:flex; flex-direction:column; gap:9px; }
.feature-tab { width:100%; display:flex; align-items:center; gap:15px; padding:18px; border:1px solid transparent; color:#66758d; text-align:left; background:transparent; border-radius:16px; cursor:pointer; transition:.2s; }
.feature-tab>span { color:#aeb9ca; font:800 11px "Inter"; }
.feature-tab div { display:flex; flex-direction:column; gap:4px; }
.feature-tab strong { color:#28354a; font-size:15px; }
.feature-tab small { font-size:11px; }
.feature-tab.active { border-color:#d8e7ff; background:#f3f7ff; box-shadow:inset 3px 0 var(--brand); }
.feature-tab.active>span,.feature-tab.active strong { color:var(--brand); }
.product-demo { min-height:450px; border:1px solid #dfe7f2; border-radius:25px; background:#fff; overflow:hidden; box-shadow:0 30px 80px rgba(28,60,123,.12); transition:opacity .16s,transform .16s; }
.product-demo.switching { opacity:.3; transform:translateY(4px); }
.demo-toolbar { height:58px; display:grid; grid-template-columns:1fr auto 1fr; align-items:center; padding:0 20px; border-bottom:1px solid #edf1f7; color:#95a1b3; }
.window-dots { display:flex; gap:6px; }
.window-dots span { width:8px; height:8px; border-radius:50%; background:#ff605c; }
.window-dots span:nth-child(2){background:#ffbd44}.window-dots span:nth-child(3){background:#00ca4e}
.secure-pill { justify-self:end; padding:6px 10px; border-radius:99px; color:#07865c; background:#eafaf4; font-size:10px; font-weight:800; }
.demo-body { padding:34px; background:linear-gradient(180deg,#fff,#f8faff); }
.demo-summary { display:flex; align-items:flex-start; justify-content:space-between; }
.demo-summary p,.report-card>p { margin:0 0 12px; color:var(--brand); font:800 10px "Inter"; letter-spacing:.14em; }
.demo-summary h3 { margin:0; font-size:32px; line-height:1.25; letter-spacing:-.045em; }
.status-badge { padding:8px 12px; color:#fff; border-radius:10px; background:linear-gradient(135deg,var(--brand),var(--violet)); font-size:11px; font-weight:800; }
.demo-grid { display:grid; grid-template-columns:1.35fr .8fr; gap:16px; margin-top:34px; }
.question-card,.report-card { min-height:170px; padding:20px; border:1px solid #e5ebf3; border-radius:17px; background:#fff; box-shadow:0 9px 24px rgba(15,23,42,.055); }
.card-line { display:flex; align-items:center; gap:9px; }
.q-badge { padding:4px 7px; color:#fff; border-radius:7px; background:linear-gradient(135deg,var(--brand),var(--violet)); font:800 10px "Inter"; }
.card-line strong { font-size:13px; }
.formula { margin:27px 0 20px; font:600 23px Georgia,serif; text-align:center; }
.choices { display:flex; justify-content:space-between; color:#66758d; font-size:11px; }
.report-card ul { display:flex; flex-direction:column; gap:14px; margin:22px 0 0; padding:0; list-style:none; color:#435068; font-size:12px; font-weight:700; }
.report-card li span { display:inline-grid; place-items:center; width:18px; height:18px; margin-right:8px; color:#00a46d; background:#e7faf3; border-radius:50%; font-size:10px; }
.demo-progress { height:5px; margin-top:26px; background:#eaf0f8; border-radius:99px; overflow:hidden; }
.demo-progress span { display:block; width:42%; height:100%; background:linear-gradient(90deg,var(--brand),var(--violet)); transition:width .4s; }

.engineering-section { padding:145px 0; color:#fff; background:linear-gradient(135deg,#0768f4 0%,#5354f4 52%,#7c3aed 100%); }
.light-heading .eyebrow { color:#c7d9ff; }.light-heading>p:last-child{color:#dce6ff}
.engineering-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:15px; margin-top:58px; }
.engineering-grid article { position:relative; min-height:285px; padding:27px 27px 56px; border:1px solid rgba(255,255,255,.23); border-radius:20px; background:rgba(255,255,255,.11); backdrop-filter:blur(8px); }
.card-index { position:absolute; right:22px; top:22px; color:rgba(255,255,255,.45); font:800 11px "Inter"; }
.domain-icon { width:42px; height:42px; display:grid; place-items:center; border:1px solid rgba(255,255,255,.28); border-radius:13px; background:rgba(255,255,255,.14); font:800 19px "Inter"; }
.engineering-grid h3 { margin:25px 0 12px; font-size:20px; letter-spacing:-.035em; }
.engineering-grid p { margin:0; color:#e3ebff; font-size:13px; line-height:1.75; }
.engineering-grid small { position:absolute; bottom:25px; color:#c7d5ff; font:700 9px "Inter"; letter-spacing:.1em; }

.architecture-section { padding-block:150px; }
.centered-heading { max-width:760px; margin-inline:auto; text-align:center; }
.architecture-map { display:grid; grid-template-columns:1fr auto 1.1fr auto 1.1fr auto 1fr; gap:14px; align-items:center; margin-top:70px; padding:34px; border:1px solid var(--line); border-radius:28px; background:linear-gradient(180deg,#fff,#f7faff); box-shadow:0 30px 70px rgba(26,55,110,.08); }
.arch-column { display:flex; flex-direction:column; gap:10px; }
.arch-label { margin-bottom:3px; color:#9aa7ba; font:800 9px "Inter"; letter-spacing:.15em; }
.arch-node { display:flex; flex-direction:column; gap:5px; padding:17px; border:1px solid #e0e8f2; border-radius:14px; background:#fff; }
.arch-node b { font-size:13px; }.arch-node small{color:#8a98ac;font-size:9px}
.accent-node { color:#075fe8; border-color:#cfe1ff; background:#f0f6ff; }
.purple-node { color:#6934db; border-color:#ddd0fb; background:#f6f1ff; }
.success-node { color:#07855d; border-color:#ccefe3; background:#effbf7; }
.arch-flow { display:flex; flex-direction:column; align-items:center; color:#aab6c7; }
.arch-flow span { font:800 8px "Inter"; letter-spacing:.1em; }.arch-flow i{font-style:normal;font-size:20px}
.stack-row { display:flex; flex-wrap:wrap; justify-content:center; gap:8px; margin-top:28px; }
.stack-row span { padding:8px 12px; border:1px solid #e1e8f1; border-radius:99px; color:#68758a; background:#fff; font:700 10px "Inter"; }

.case-study-section { display:grid; grid-template-columns:.8fr 1.2fr; gap:80px; align-items:center; padding-bottom:160px; }
.case-copy h2,.public-scope h2 { margin:0; font-size:clamp(36px,4vw,54px); line-height:1.25; letter-spacing:-.055em; }
.case-copy>p:not(.eyebrow) { margin:24px 0; color:var(--muted); line-height:1.85; }
.case-copy>a { color:var(--brand); font-size:13px; font-weight:800; }
.figure-lab { overflow:hidden; border:1px solid #dce6f3; border-radius:23px; background:#fbfdff; box-shadow:0 28px 60px rgba(36,67,120,.11); }
.lab-toolbar { display:flex; justify-content:space-between; padding:17px 20px; border-bottom:1px solid #e7edf5; color:#536178; font:700 11px "Inter"; }
.lab-toolbar small { color:#009969; }.figure-lab svg{display:block;width:100%;padding:20px}
.grid-lines path { stroke:#e7edf6; stroke-width:1; }.axis{fill:none;stroke:#a9b6c9;stroke-width:1.5}.curve{fill:none;stroke:url(#lineGradient);stroke-width:5;stroke-linecap:round}.points circle{fill:#fff;stroke:#693af0;stroke-width:3}
.lab-legend { display:flex; flex-wrap:wrap; gap:18px; padding:0 22px 22px; color:#8390a3; font:700 9px "Inter"; text-transform:uppercase; letter-spacing:.06em; }.lab-legend i{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--brand);margin-right:5px}

.public-scope { display:grid; grid-template-columns:.75fr 1.25fr; gap:80px; align-items:start; padding-block:120px; border-top:1px solid var(--line); }
.scope-columns { display:grid; grid-template-columns:1fr 1fr; gap:15px; }
.scope-columns article { padding:25px; border:1px solid #e1e8f1; border-radius:18px; }
.scope-columns h3 { margin:0 0 20px; font-size:15px; }.scope-columns h3 span{margin-right:7px}.included h3 span{color:#00a46d}.excluded h3 span{color:#94a3b8}
.scope-columns ul{margin:0;padding:0;list-style:none;color:#657287;font-size:12px;line-height:2}.scope-columns li::before{content:"·";margin-right:7px;color:#b0bbca}

.closing-section { padding:0 24px 24px; }
.closing-content { width:min(1380px,100%); min-height:500px; margin:auto; display:flex; flex-direction:column; align-items:center; justify-content:center; padding:70px 24px; color:#fff; text-align:center; border-radius:32px; background:linear-gradient(135deg,var(--brand),#534cf4 52%,var(--violet)); overflow:hidden; }
.closing-content>p { margin:0 0 24px; color:#cdddff; font:800 11px "Inter"; letter-spacing:.2em; }
.closing-content h2 { margin:0; font-size:clamp(38px,4vw,60px); line-height:1.25; letter-spacing:-.06em; }
.closing-content>div { display:flex; gap:10px; margin-top:34px; }
.white-button { color:#075fe8; background:#fff; box-shadow:0 15px 35px rgba(10,30,90,.2); }
.ghost-button { color:#fff; border:1px solid rgba(255,255,255,.35); background:rgba(255,255,255,.08); }
footer { width:min(1180px,calc(100% - 48px)); margin:auto; display:grid; grid-template-columns:1fr auto; gap:15px; align-items:center; padding:55px 0; color:#8390a3; font-size:11px; }
.footer-brand{font-size:18px}footer p{grid-column:1;margin:0}footer>div{grid-column:2;grid-row:1/3;display:flex;gap:22px;font-weight:700}footer small{grid-column:1/3;border-top:1px solid var(--line);padding-top:18px;margin-top:12px}

.reveal-ready { opacity:0; transform:translateY(18px); transition:opacity .65s ease,transform .65s ease; }
.revealed { opacity:1; transform:none; }
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.reveal-ready{opacity:1;transform:none;transition:none}}

@media (max-width: 980px) {
  .site-header { grid-template-columns:1fr auto auto; height:68px; padding-inline:24px; }
  .site-header nav { position:fixed; inset:68px 16px auto; display:none; flex-direction:column; gap:0; padding:12px; border:1px solid #e1e8f1; border-radius:18px; background:#fff; box-shadow:0 20px 50px rgba(15,23,42,.14); }
  body.menu-open::before { content:""; position:fixed; inset:68px 0 0; z-index:40; background:rgba(15,23,42,.18); backdrop-filter:blur(2px); }
  .site-header nav a{padding:14px}.header-actions{margin-right:8px}.header-cta{display:none}.menu-button{display:flex;flex-direction:column;justify-content:center;gap:6px;width:42px;height:42px;border:1px solid #e1e8f1;border-radius:12px;background:#fff}.menu-button span{width:18px;height:2px;margin-inline:auto;background:#26344a;transition:.2s}.menu-open .site-header nav{display:flex}.menu-open .menu-button span:first-child{transform:translateY(4px) rotate(45deg)}.menu-open .menu-button span:last-child{transform:translateY(-4px) rotate(-45deg)}
  .hero{min-height:auto;grid-template-columns:1fr;padding-top:70px}.hero-copy{text-align:center}.hero-description{margin-inline:auto}.hero-actions,.hero-points{justify-content:center}.hero-visual{max-width:760px;margin:25px auto 0}.tag-analysis{left:1%}.tag-verified{right:1%}
  .process-strip{grid-template-columns:1fr 1fr;margin-bottom:110px}.process-strip i{display:none}.process-strip div{padding:12px}
  .brand-film { min-height:700px; margin-bottom:110px; }.brand-film-copy{left:32px;right:32px}.sound-toggle{right:28px;bottom:5%}
  .feature-stage{grid-template-columns:1fr}.feature-nav{display:grid;grid-template-columns:1fr 1fr}.feature-tab{border-color:#edf1f6}
  .engineering-grid{grid-template-columns:1fr 1fr}.architecture-map{grid-template-columns:1fr 1fr}.arch-flow{display:none}.case-study-section,.public-scope{grid-template-columns:1fr}.case-study-section{gap:45px}.public-scope{gap:45px}.architecture-map{gap:12px}
}

@media (max-width: 640px) {
  .section-shell{width:min(100% - 32px,1180px)}.site-header{padding-inline:16px}.brand{font-size:16px}.language-switch button{min-width:37px;padding:0 5px}
  .hero{padding-top:52px;padding-bottom:60px}.hero h1{font-size:44px}.hero-description{font-size:14px}.hero-actions{flex-direction:column}.primary-button,.secondary-button{width:100%}.hero-points{gap:12px;font-size:10px}.floating-tag{display:none}
  .process-strip{width:calc(100% - 32px);padding:15px;margin-bottom:90px}.process-strip div{grid-template-columns:auto 1fr}.process-strip strong{font-size:13px}
  .brand-film{min-height:620px;margin-bottom:90px}.brand-film-shade{background:linear-gradient(0deg,rgba(4,13,31,.76),rgba(4,13,31,.05) 78%)}.brand-film-copy{left:20px;right:20px;bottom:14%}.brand-film-copy h2{font-size:38px}.brand-film-copy>span{font-size:12px}.sound-toggle{right:18px;bottom:4%}
  .section-heading h2,.case-copy h2,.public-scope h2{font-size:35px}.product-section{padding-bottom:100px}.feature-stage{margin-top:40px}.feature-nav{display:flex;overflow-x:auto;flex-direction:row;padding-bottom:4px}.feature-tab{min-width:210px}.demo-toolbar{grid-template-columns:1fr auto}.demo-toolbar>small{display:none}.demo-body{padding:22px}.demo-summary h3{font-size:25px}.status-badge{display:none}.demo-grid{grid-template-columns:1fr}.question-card,.report-card{min-height:auto}.choices{font-size:9px}
  .engineering-section{padding:95px 0}.engineering-grid{grid-template-columns:1fr}.engineering-grid article{min-height:245px}
  .architecture-section{padding-block:95px}.architecture-map{grid-template-columns:1fr;padding:18px;margin-top:45px}.arch-column{gap:7px}.arch-label{margin-top:10px}.stack-row{justify-content:flex-start}
  .case-study-section{padding-bottom:100px}.figure-lab svg{padding:8px}.public-scope{padding-block:85px}.scope-columns{grid-template-columns:1fr}
  .closing-section{padding:0}.closing-content{min-height:440px;border-radius:0}.closing-content>div{width:100%;flex-direction:column}.white-button,.ghost-button{width:100%}
  footer{width:calc(100% - 32px);grid-template-columns:1fr;padding:42px 0}footer>div{grid-column:1;grid-row:auto;flex-wrap:wrap}footer small{grid-column:1}
}