:root {
  color-scheme: dark;
  --bg: #090b0c; --surface: #111416; --surface-2: #171b1d; --line: #292f32;
  --text: #eef2ef; --muted: #89928f; --green: #62eea8; --orange: #ff9b52;
  --shadow: 0 18px 60px rgba(0, 0, 0, .2);
}
html[data-theme="light"] {
  color-scheme: light;
  --bg: #f4f6f5; --surface: #fff; --surface-2: #edf1ef; --line: #d8dedb;
  --text: #18201c; --muted: #66716c; --green: #18a86b; --orange: #d66a1e;
  --shadow: 0 18px 60px rgba(24, 32, 28, .08);
}
* { box-sizing: border-box; }
html { min-width: 320px; min-height: 100%; background: var(--bg); scroll-behavior: smooth; }
body { margin: 0; min-height: 100vh; background: var(--bg); color: var(--text); font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "Apple SD Gothic Neo", "Noto Sans KR", sans-serif; transition: background-color .18s ease, color .18s ease; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
a, button { -webkit-tap-highlight-color: transparent; }
.topbar { min-height: 70px; border-bottom: 1px solid var(--line); display: flex; align-items: center; padding: 0 32px; position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 92%, transparent); backdrop-filter: blur(16px); }
.brand { display: flex; align-items: center; gap: 12px; letter-spacing: .08em; }
.brand-mark { width: 34px; height: 34px; display: grid; place-items: center; background: var(--green); color: #07110c; font-weight: 900; border-radius: 8px; }
.brand-copy strong, .brand-copy small { display: block; }
.brand-copy strong { font-size: 13px; }
.brand-copy small { color: var(--muted); font-size: 9px; margin-top: 3px; }
.main-nav { align-self: stretch; display: flex; gap: 4px; margin-left: auto; margin-right: 24px; }
.main-nav a { display: flex; align-items: center; border-bottom: 2px solid transparent; color: var(--muted); font-size: 12px; font-weight: 700; padding: 0 14px; }
.main-nav a:hover, .main-nav a.active { color: var(--text); border-bottom-color: var(--green); }
.header-actions { display: flex; align-items: center; gap: 9px; }
.icon-button { width: 36px; height: 36px; color: var(--text); background: var(--surface-2); border: 1px solid var(--line); border-radius: 8px; cursor: pointer; font-size: 17px; }
.icon-button:hover { border-color: var(--muted); }
.page-shell { width: min(1040px, calc(100% - 64px)); margin: 0 auto; }
.hero { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(280px, .7fr); gap: 56px; align-items: center; padding: 72px 0 58px; }
.eyebrow { color: var(--green); font: 700 10px ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .14em; margin: 0 0 13px; text-transform: uppercase; }
h1, h2, h3, p { margin-top: 0; }
h1 { font-size: clamp(40px, 5vw, 58px); line-height: 1.02; letter-spacing: -.05em; margin-bottom: 18px; }
h2 { font-size: clamp(23px, 2.5vw, 30px); line-height: 1.15; letter-spacing: -.035em; margin-bottom: 0; }
h3 { font-size: 16px; letter-spacing: -.02em; }
.lead { color: var(--muted); font-size: 15px; line-height: 1.8; max-width: 610px; margin-bottom: 0; }
.actions { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 26px; }
.button { min-height: 44px; display: inline-flex; align-items: center; justify-content: center; padding: 0 18px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface-2); color: var(--text); font-size: 13px; font-weight: 800; transition: transform .15s ease, border-color .15s ease; }
.button:hover { transform: translateY(-1px); border-color: var(--muted); }
.button.primary { background: var(--green); border-color: var(--green); color: #07110c; }
.focus-panel { border: 1px solid var(--line); border-radius: 10px; background: var(--surface); padding: 22px; }
.focus-panel > .eyebrow { color: var(--orange); }
.focus-item { border-top: 1px solid var(--line); padding: 14px 0; }
.focus-item:first-of-type { border-top: 0; padding-top: 4px; }
.focus-item:last-child { padding-bottom: 0; }
.focus-item strong { display: block; font-size: 14px; margin-bottom: 7px; }
.focus-item span { display: block; color: var(--muted); font-size: 13px; line-height: 1.65; }
.content-section { border-top: 1px solid var(--line); padding: 44px 0; }
.section-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 28px; margin-bottom: 26px; }
.section-copy { max-width: 560px; color: var(--muted); font-size: 14px; line-height: 1.75; margin-bottom: 0; }
.product { display: grid; grid-template-columns: minmax(250px, .75fr) minmax(0, 1.25fr); overflow: hidden; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
.product-name { display: flex; flex-direction: column; justify-content: space-between; gap: 36px; padding: 28px; background: var(--green); color: #07110c; }
.product-name strong { font-size: 21px; letter-spacing: -.03em; }
.tag { font: 800 10px ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .1em; }
.product-body { padding: 28px; }
.product-body p, .card p { color: var(--muted); font-size: 14px; line-height: 1.75; }
.plain-list { list-style: none; display: grid; gap: 11px; margin: 20px 0 0; padding: 0; color: var(--muted); font-size: 13px; }
.plain-list li { position: relative; padding-left: 16px; }
.plain-list li::before { content: ""; position: absolute; left: 0; top: .55em; width: 6px; height: 6px; border-radius: 50%; background: var(--green); }
.product-actions { margin-top: 22px; }
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.card { min-height: 168px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); padding: 22px; }
.card .number { color: var(--green); font: 800 10px ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .12em; }
.card h3 { margin: 24px 0 9px; }
.developer-section .section-head { align-items: flex-start; margin-bottom: 0; }
.developer-section .section-copy p { margin-bottom: 14px; }
.text-actions { display: flex; flex-wrap: wrap; gap: 16px; }
.text-actions a { color: var(--green); font-size: 12px; font-weight: 800; }
.text-actions a:hover { text-decoration: underline; }
.contact-band { display: flex; align-items: center; justify-content: space-between; gap: 24px; border: 1px solid var(--line); border-radius: 12px; padding: 28px; background: linear-gradient(110deg, var(--surface), var(--surface-2) 60%); }
.contact-band p { color: var(--muted); font-size: 14px; margin: 8px 0 0; }
.site-footer { min-height: 64px; border-top: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 0 32px; color: var(--muted); font: 700 9px ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .12em; }
.site-footer a:hover { color: var(--text); }
.policy-shell { width: min(940px, calc(100% - 64px)); margin: 0 auto; }
.policy-hero { padding: 72px 0 34px; }
.policy-hero h1 { font-size: clamp(38px, 6vw, 60px); }
.policy-panel { border: 1px solid var(--line); border-radius: 12px; background: var(--surface); padding: 34px; margin-bottom: 48px; }
.policy-meta { display: flex; flex-wrap: wrap; gap: 10px 22px; border-bottom: 1px solid var(--line); padding-bottom: 24px; margin-bottom: 30px; color: var(--muted); font-size: 13px; }
.policy-meta strong, .policy-panel strong { color: var(--text); }
.policy-panel h2 { font-size: 18px; margin: 34px 0 11px; letter-spacing: -.025em; }
.policy-panel h2:first-of-type { margin-top: 0; }
.policy-panel p, .policy-panel ul { color: var(--muted); font-size: 14px; line-height: 1.85; }
.policy-panel p { margin-bottom: 14px; }
.policy-panel ul { margin: 10px 0 18px; padding-left: 20px; }
.policy-panel li { margin: 6px 0; }
.text-link { color: var(--green); font-weight: 800; }
.text-link:hover { text-decoration: underline; }
.notice { margin: 20px 0; padding: 16px 18px; border: 1px solid color-mix(in srgb, var(--orange) 35%, transparent); border-radius: 8px; background: color-mix(in srgb, var(--orange) 8%, transparent); color: var(--muted); }
.notice strong { color: var(--orange); }
.not-found { min-height: calc(100vh - 135px); display: grid; place-items: center; padding: 50px 24px; }
.not-found-panel { width: min(620px, 100%); border: 1px solid var(--line); border-radius: 12px; background: var(--surface); padding: 38px; box-shadow: var(--shadow); }
.not-found-panel h1 { font-size: clamp(38px, 7vw, 58px); }
.not-found-panel .lead { margin-bottom: 26px; }
@media (max-width: 860px) {
  .topbar { flex-wrap: wrap; padding: 0 20px; }
  .brand { min-height: 68px; }
  .main-nav { order: 3; width: 100%; height: 42px; margin: 0; border-top: 1px solid var(--line); overflow-x: auto; }
  .main-nav a { height: 42px; white-space: nowrap; }
  .header-actions { margin-left: auto; }
  .page-shell, .policy-shell { width: min(100% - 36px, 1180px); }
  .hero, .product { grid-template-columns: 1fr; }
  .hero { padding-top: 48px; gap: 26px; }
  .section-head { align-items: flex-start; flex-direction: column; }
  .card-grid { grid-template-columns: 1fr; }
  .card { min-height: 0; }
  .site-footer { padding: 20px; }
}
@media (max-width: 560px) {
  h1 { font-size: clamp(36px, 11vw, 46px); }
  .topbar { padding: 0 14px; }
  .brand-copy small { display: none; }
  .main-nav a { padding: 0 11px; }
  .page-shell, .policy-shell { width: min(100% - 28px, 1180px); }
  .hero { padding: 40px 0 42px; }
  .content-section { padding: 36px 0; }
  .product-name, .product-body, .focus-panel, .contact-band, .policy-panel, .not-found-panel { padding: 22px; }
  .contact-band, .site-footer { align-items: flex-start; flex-direction: column; }
  .button { width: 100%; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } body, .button { transition: none; } }