:root {
  color-scheme: light;
  --pilot: #0b2734;
  --pilot-2: #164b60;
  --paper: #f5f7f6;
  --surface: #ffffff;
  --ink: #152a32;
  --muted: #5e7077;
  --line: #cbd7d8;
  --ice: #a6e2ee;
  --ice-2: #e0f7fa;
  --gold: #b58b45;
  --shadow: 0 18px 46px rgba(12, 38, 48, .1);
}

* { box-sizing: border-box; }
html { background: var(--paper); scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Noto Sans KR", sans-serif; line-height: 1.68; }
a { color: inherit; }

.site { width: min(1080px, calc(100% - 40px)); margin: 0 auto; padding: 18px 0 72px; }
.nav { position: sticky; top: 12px; z-index: 10; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 10px 12px; border: 1px solid rgba(203, 215, 216, .94); border-radius: 12px; background: rgba(255, 255, 255, .93); box-shadow: 0 12px 30px rgba(12, 38, 48, .1); backdrop-filter: blur(18px); }
.brand { display: flex; align-items: center; gap: 11px; text-decoration: none; font-weight: 900; }
.brand-icon, .hero-icon { display: block; object-fit: cover; box-shadow: 0 12px 28px rgba(10, 34, 50, .18); }
.brand-icon { width: 40px; height: 40px; border-radius: 11px; }
.nav-links { display: flex; align-items: center; gap: 7px; flex-wrap: wrap; justify-content: flex-end; }
.nav-links a, .lang-button { min-height: 36px; padding: 7px 11px; border: 1px solid transparent; border-radius: 7px; color: var(--ink); background: transparent; text-decoration: none; font: inherit; font-size: 13px; font-weight: 800; cursor: pointer; }
.nav-links a:hover, .lang-button:hover { border-color: var(--line); background: var(--paper); }
.lang-button.active { color: var(--surface); border-color: var(--pilot); background: var(--pilot); }

.app-hero { display: grid; grid-template-columns: minmax(0, 1fr) 250px; gap: 36px; align-items: center; margin: 22px 0 0; padding: clamp(34px, 6vw, 68px); color: var(--surface); background: var(--pilot); }
.hero-copy { max-width: 720px; }
.hero-product { display: grid; justify-items: center; gap: 18px; text-align: center; }
.hero-product p { margin: 0; color: rgba(224, 247, 250, .75); font-size: 14px; font-weight: 700; }
.hero-icon { width: min(196px, 32vw); height: min(196px, 32vw); border-radius: 25%; }
.eyebrow { margin: 0 0 12px; color: var(--pilot-2); font-size: 12px; font-weight: 900; letter-spacing: .1em; text-transform: uppercase; }
.app-hero .eyebrow { color: var(--ice); }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 18px; font-size: clamp(48px, 7vw, 82px); line-height: .96; letter-spacing: 0; }
h2 { margin-bottom: 14px; font-size: clamp(27px, 4vw, 48px); line-height: 1.16; letter-spacing: 0; }
h3 { margin-bottom: 8px; font-size: 19px; line-height: 1.35; }
p, li { font-size: 16px; }
.lead { margin: 0; color: rgba(255, 255, 255, .88); font-size: clamp(18px, 2.1vw, 23px); word-break: keep-all; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 27px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 11px 18px; border: 1px solid transparent; border-radius: 7px; text-decoration: none; font-weight: 900; }
.button.primary { color: var(--pilot); background: var(--ice); }
.button.secondary { color: var(--surface); border-color: rgba(255, 255, 255, .38); }
.button.secondary:hover { color: var(--pilot); background: var(--surface); }

.summary-strip { display: grid; grid-template-columns: repeat(3, 1fr); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); border-left: 1px solid var(--line); background: var(--surface); }
.summary-strip > div { min-height: 106px; padding: 20px 24px; border-right: 1px solid var(--line); }
.summary-strip > div:last-child { border-right: 0; }
.summary-strip strong, .summary-strip span { display: block; }
.summary-strip strong { margin-bottom: 4px; font-size: 16px; }
.summary-strip span { color: var(--muted); font-size: 14px; }

.section-block { padding: 94px 0; border-bottom: 1px solid var(--line); }
.section-heading { max-width: 830px; }
.section-heading > p:last-child { max-width: 760px; margin-bottom: 0; color: var(--muted); font-size: 18px; word-break: keep-all; }
.mounting-figure { margin: 36px 0 0; }
.mounting-figure img { display: block; width: 100%; height: auto; border: 1px solid #2d444b; background: #000; }
.mounting-figure figcaption, .phone-shot figcaption { margin-top: 12px; color: var(--muted); font-size: 14px; }
.mounting-notes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 34px; }
.mounting-notes > div { padding-top: 18px; border-top: 3px solid var(--ice); }
.mounting-notes strong { font-size: 18px; }
.mounting-notes p { margin: 7px 0 0; color: var(--muted); word-break: keep-all; }

.screen-explainer { display: grid; grid-template-columns: minmax(250px, .7fr) minmax(0, 1fr); gap: clamp(34px, 7vw, 94px); align-items: center; margin-top: 38px; }
.phone-shot { width: min(100%, 330px); margin: 0 auto; }
.phone-shot img { display: block; width: 100%; height: auto; border: 8px solid #0e0f12; border-radius: 30px; box-shadow: var(--shadow); }
.screen-points { display: grid; gap: 0; }
.screen-points article { display: grid; grid-template-columns: 46px 1fr; gap: 16px; padding: 23px 0; border-top: 1px solid var(--line); }
.screen-points article:last-child { border-bottom: 1px solid var(--line); }
.screen-points span { display: grid; place-items: center; align-self: start; width: 36px; height: 36px; color: var(--pilot); background: var(--ice); font-size: 13px; font-weight: 900; }
.screen-points p { margin-bottom: 0; color: var(--muted); word-break: keep-all; }

.workflow-section { background: var(--surface); }
.workflow-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 42px; margin: 38px 0 0; padding: 0; list-style: none; counter-reset: item; }
.workflow-list li { display: grid; grid-template-columns: 38px 1fr; gap: 14px; padding: 24px 0; border-top: 1px solid var(--line); }
.workflow-list li > span { display: grid; place-items: center; width: 30px; height: 30px; color: var(--surface); background: var(--pilot); font-size: 13px; font-weight: 900; }
.workflow-list p { margin: 6px 0 0; color: var(--muted); word-break: keep-all; }

.questions { display: grid; border-top: 1px solid var(--line); }
details { border-bottom: 1px solid var(--line); }
summary { padding: 21px 34px 21px 0; font-size: 18px; font-weight: 800; cursor: pointer; }
details p { max-width: 820px; margin: -3px 0 22px; color: var(--muted); word-break: keep-all; }
.release-note { display: flex; align-items: center; justify-content: space-between; gap: 42px; padding: 58px; color: var(--surface); background: var(--pilot); }
.release-note .eyebrow { color: var(--ice); }
.release-note h2 { max-width: 700px; }
.release-note p:last-child { max-width: 740px; margin-bottom: 0; color: rgba(255, 255, 255, .78); word-break: keep-all; }
.release-note .button { flex: 0 0 auto; }
.footer { display: flex; justify-content: space-between; gap: 24px; padding-top: 32px; color: var(--muted); font-size: 13px; }
.footer a { color: var(--pilot-2); font-weight: 900; }

@media (max-width: 800px) {
  .site { width: min(100% - 28px, 1080px); padding-top: 14px; }
  .nav { position: static; align-items: flex-start; flex-direction: column; }
  .nav-links { justify-content: flex-start; }
  .app-hero { grid-template-columns: 1fr; }
  .hero-product { justify-items: start; grid-template-columns: auto 1fr; text-align: left; }
  .hero-icon { width: 90px; height: 90px; }
  .summary-strip { grid-template-columns: 1fr; }
  .summary-strip > div { min-height: 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .summary-strip > div:last-child { border-bottom: 0; }
  .mounting-notes { grid-template-columns: 1fr; }
  .screen-explainer { grid-template-columns: 1fr; }
  .phone-shot { width: min(100%, 310px); margin: 0; }
  .workflow-list { grid-template-columns: 1fr; }
  .release-note { align-items: flex-start; flex-direction: column; padding: 38px 28px; }
  .footer { flex-direction: column; }
}

@media (max-width: 520px) {
  .app-hero { padding: 38px 24px; }
  .section-block { padding: 70px 0; }
  .mounting-figure { margin-top: 28px; overflow: auto; }
  .mounting-figure img { min-width: 680px; }
  .screen-points article { grid-template-columns: 38px 1fr; gap: 12px; }
  summary { font-size: 16px; }
}