@import url('https://fonts.googleapis.com/css2?family=Inter:wght@600;700;800&family=Noto+Sans+KR:wght@400;500;600;700;800&display=swap');

:root {
  --bg: #07111f;
  --bg-soft: #0d1a2b;
  --panel: #12243a;
  --text: #f7fbff;
  --muted: #9fb0c4;
  --line: rgba(255,255,255,.1);
  --accent: #7dfc9a;
  --accent-strong: #46e673;
  --ink: #0b1726;
  --white: #fff;
  --max: 1180px;
  --radius: 28px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Noto Sans KR", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 0%, rgba(43, 101, 255, .22), transparent 30%),
    radial-gradient(circle at 90% 12%, rgba(70, 230, 115, .16), transparent 28%),
    var(--bg);
  line-height: 1.65;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.container { width: min(calc(100% - 40px), var(--max)); margin: 0 auto; }
.narrow { width: min(calc(100% - 40px), 860px); }
.site-header {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: blur(18px);
  background: rgba(7,17,31,.78);
  border-bottom: 1px solid var(--line);
}
.header-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-family: Inter, sans-serif; font-weight: 800; letter-spacing: -.03em; }
.brand-mark {
  width: 34px; height: 34px; display: grid; place-items: center;
  border-radius: 10px; background: var(--accent); color: var(--ink);
  box-shadow: 0 0 30px rgba(125,252,154,.28);
}
.nav { display: flex; gap: 28px; color: var(--muted); font-size: 14px; }
.nav a:hover, .footer-links a:hover { color: var(--accent); }
.header-cta { padding: 11px 16px; border-radius: 12px; color: var(--ink); background: var(--accent); font-weight: 700; font-size: 14px; }
.hero { padding: 96px 0 74px; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.02fr .98fr; align-items: center; gap: 64px; min-height: 690px; }
.eyebrow { display: inline-block; color: var(--accent); font-family: Inter, sans-serif; font-size: 13px; font-weight: 800; letter-spacing: .14em; margin-bottom: 18px; }
h1,h2,h3,p { margin-top: 0; }
h1 { font-size: clamp(48px, 6vw, 82px); line-height: 1.08; letter-spacing: -.055em; margin-bottom: 28px; }
h1 strong { color: var(--accent); }
.hero-text { max-width: 620px; font-size: 20px; color: var(--muted); margin-bottom: 34px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.button { min-height: 54px; padding: 0 24px; display: inline-flex; align-items: center; justify-content: center; border-radius: 16px; font-weight: 800; }
.button.primary { background: var(--accent); color: var(--ink); }
.button.secondary { border: 1px solid var(--line); background: rgba(255,255,255,.04); }
.hero-note { margin: 18px 0 0; color: #70849a; font-size: 12px; }
.hero-visual { position: relative; min-height: 650px; display: grid; place-items: center; }
.hero-visual::before {
  content: ""; position: absolute; width: 470px; height: 470px; border-radius: 50%;
  background: radial-gradient(circle, rgba(125,252,154,.24), transparent 67%);
  filter: blur(8px);
}
.phone {
  width: min(310px, 78vw); padding: 11px; border-radius: 42px;
  background: linear-gradient(160deg,#26384c,#060b12);
  border: 1px solid rgba(255,255,255,.18);
  box-shadow: 0 30px 80px rgba(0,0,0,.45);
}
.phone img { width: 100%; aspect-ratio: 9/16; object-fit: cover; border-radius: 32px; background: #0f1e30; }
.phone-main { transform: rotate(3deg); position: relative; z-index: 2; }
.data-card {
  position: absolute; z-index: 3; width: 210px; padding: 18px 20px;
  border-radius: 18px; background: rgba(14,29,47,.88); border: 1px solid var(--line);
  backdrop-filter: blur(14px); box-shadow: 0 18px 40px rgba(0,0,0,.3);
}
.data-card span { display: block; color: var(--muted); font-size: 12px; }
.data-card strong { display: block; margin-top: 3px; font-size: 16px; }
.card-top { top: 105px; right: -10px; }
.card-bottom { left: 0; bottom: 95px; }
.trust-strip { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(255,255,255,.025); }
.trust-grid { display: grid; grid-template-columns: repeat(3,1fr); }
.trust-grid div { padding: 28px 34px; border-right: 1px solid var(--line); }
.trust-grid div:last-child { border-right: 0; }
.trust-grid strong { display: block; font-size: 18px; }
.trust-grid span { color: var(--muted); font-size: 13px; }
.section { padding: 130px 0; }
.section-heading { max-width: 700px; margin-bottom: 72px; }
.section-heading.center { text-align: center; margin-left: auto; margin-right: auto; }
.section-heading h2 { font-size: clamp(38px,5vw,64px); line-height: 1.15; letter-spacing: -.045em; margin-bottom: 18px; }
.section-heading p { color: var(--muted); font-size: 18px; }
.feature-list { display: grid; gap: 54px; }
.feature {
  min-height: 610px; display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 40px;
  padding: 64px; border-radius: var(--radius); background: linear-gradient(145deg,rgba(20,41,65,.96),rgba(9,22,38,.95));
  border: 1px solid var(--line); overflow: hidden;
}
.feature.reverse .feature-copy { order: 2; }
.feature.reverse .feature-screen { order: 1; }
.feature-number { color: var(--accent); font-family: Inter,sans-serif; font-weight: 800; letter-spacing: .15em; font-size: 13px; }
.feature h3 { font-size: clamp(34px,4vw,52px); margin: 12px 0 22px; letter-spacing: -.04em; }
.feature p { color: var(--muted); font-size: 18px; max-width: 560px; }
.feature ul { margin: 28px 0 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.feature li::before { content: "✓"; color: var(--accent); font-weight: 800; margin-right: 10px; }
.feature-screen { display: grid; place-items: center; }
.gallery-section { background: #f4f7fa; color: #102033; }
.gallery-section .section-heading p { color: #66778a; }
.screen-gallery { display: grid; grid-template-columns: repeat(4,1fr); gap: 22px; }
.screen-gallery figure { margin: 0; }
.screen-gallery img { width: 100%; aspect-ratio: 9/16; object-fit: cover; border-radius: 26px; box-shadow: 0 18px 45px rgba(19,38,61,.14); background: #dfe7ef; }
.screen-gallery figcaption { text-align: center; margin-top: 14px; color: #34485d; font-weight: 700; }
.download-section { padding: 100px 0; }
.download-box {
  min-height: 420px; padding: 68px; border-radius: 36px; display: grid; grid-template-columns: 1.2fr .8fr; align-items: center; gap: 50px;
  background: var(--accent); color: var(--ink); position: relative; overflow: hidden;
}
.download-box::after { content: ""; position: absolute; width: 340px; height: 340px; right: -80px; bottom: -120px; border: 60px solid rgba(7,17,31,.08); border-radius: 50%; }
.download-box .eyebrow { color: #1f6b38; }
.download-box h2 { font-size: clamp(38px,5vw,62px); line-height: 1.12; letter-spacing: -.05em; margin-bottom: 18px; }
.download-actions { display: grid; justify-items: start; gap: 20px; position: relative; z-index: 2; }
.store-button { min-width: 235px; display: flex; align-items: center; gap: 14px; padding: 14px 20px; border: 0; border-radius: 16px; background: #07111f; color: white; opacity: .92; }
.store-icon { font-size: 28px; }
.store-button small,.store-button strong { display:block; text-align:left; }
.store-button small { font-size: 10px; letter-spacing: .12em; color:#b7c4d1; }
.store-button strong { font-size: 19px; }
.text-link { font-weight: 800; }
.faq-section { padding-top: 80px; }
.faq-list { border-top: 1px solid var(--line); }
details { border-bottom: 1px solid var(--line); padding: 0; }
summary { cursor: pointer; list-style: none; padding: 26px 0; font-weight: 700; font-size: 18px; }
summary::-webkit-details-marker { display:none; }
summary::after { content: "+"; float:right; color:var(--accent); font-size:24px; }
details[open] summary::after { content:"–"; }
details p { padding: 0 0 28px; color: var(--muted); }
.site-footer { border-top: 1px solid var(--line); padding: 56px 0; background:#050b13; }
.footer-grid { display:grid; grid-template-columns:1fr auto 1fr; gap:50px; align-items:start; }
.footer-brand { margin-bottom:14px; }
.footer-grid p { color:var(--muted); font-size:13px; margin-bottom:7px; }
.footer-links { display:grid; gap:11px; font-size:14px; }
.footer-meta { text-align:right; }
.footer-meta a { color:var(--accent); }

.policy-page { min-height: 60vh; padding: 80px 0 130px; }
.policy-card { background: rgba(255,255,255,.035); border:1px solid var(--line); border-radius:24px; padding:48px; }
.policy-card h1 { font-size:46px; }
.policy-card h2 { margin-top:42px; font-size:24px; }
.policy-card p,.policy-card li { color:var(--muted); }
.policy-card a { color:var(--accent); }

@media (max-width: 900px) {
  .nav { display:none; }
  .hero { padding-top: 56px; }
  .hero-grid { grid-template-columns:1fr; gap:30px; text-align:center; }
  .hero-copy { display:flex; flex-direction:column; align-items:center; }
  .hero-visual { min-height:560px; }
  .trust-grid { grid-template-columns:1fr; }
  .trust-grid div { border-right:0; border-bottom:1px solid var(--line); text-align:center; }
  .feature,.feature.reverse { grid-template-columns:1fr; padding:42px 26px; text-align:center; }
  .feature.reverse .feature-copy,.feature.reverse .feature-screen { order:initial; }
  .feature ul { justify-items:center; }
  .screen-gallery { grid-template-columns:repeat(2,1fr); }
  .download-box { grid-template-columns:1fr; padding:48px 30px; text-align:center; }
  .download-actions { justify-items:center; }
  .footer-grid { grid-template-columns:1fr; text-align:center; }
  .footer-meta { text-align:center; }
  .footer-links { grid-template-columns:repeat(2,auto); justify-content:center; gap:12px 24px; }
}
@media (max-width: 560px) {
  .container,.narrow { width:min(calc(100% - 28px),var(--max)); }
  .header-inner { min-height:66px; }
  .header-cta { display:none; }
  .hero { padding:42px 0 56px; }
  h1 { font-size:44px; }
  .hero-text { font-size:17px; }
  .hero-actions { width:100%; }
  .button { width:100%; }
  .hero-visual { min-height:510px; }
  .data-card { width:175px; padding:14px; }
  .card-top { top:70px; right:-6px; }
  .card-bottom { left:-4px; bottom:55px; }
  .section { padding:88px 0; }
  .section-heading { margin-bottom:44px; }
  .section-heading h2 { font-size:39px; }
  .feature { min-height:0; gap:38px; border-radius:22px; }
  .feature h3 { font-size:34px; }
  .feature p { font-size:16px; }
  .screen-gallery { gap:12px; }
  .screen-gallery img { border-radius:16px; }
  .download-box { border-radius:24px; }
  .policy-card { padding:28px 20px; }
  .policy-card h1 { font-size:36px; }
  .footer-links { grid-template-columns:1fr; }
  .footer-meta { overflow-wrap:anywhere; }
  .policy-card { overflow-wrap:anywhere; }
}