:root {
  --bg: #ffffff;
  --bg-elev: #ffffff;
  --bg-soft: #f3f8f5;
  --ink: #0e1210;
  --muted: #5c6661;
  --line: rgba(14, 18, 16, 0.08);
  --gold: #12e0a0;
  --gold-deep: #00c486;
  --teal: #00c486;
  --neon: #12e0a0;
  --neon-dim: rgba(18, 224, 160, 0.22);
  --danger: #e24b4b;
  --ok: #00c486;
  --shadow: 0 18px 40px rgba(18, 224, 160, 0.08);
  --radius: 20px;
  --font: "Inter", "IBM Plex Sans KR", "Noto Sans KR", sans-serif;
  --display: "Outfit", "IBM Plex Sans KR", sans-serif;
  --max: 1120px;
  --dark: #101412;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

html[data-lang="ko"] .i18n-en,
html[data-lang="en"] .i18n-ko {
  display: none !important;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(920px 560px at -8% -12%, rgba(18, 224, 160, 0.34), transparent 58%),
    radial-gradient(760px 480px at 108% 6%, rgba(18, 224, 160, 0.18), transparent 54%),
    radial-gradient(820px 520px at 92% 108%, rgba(18, 224, 160, 0.16), transparent 52%),
    var(--bg);
  font-family: var(--font);
  line-height: 1.7;
  min-height: 100vh;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--teal);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--ink);
}

.skip {
  position: absolute;
  left: -999px;
  top: 8px;
}

.skip:focus {
  left: 12px;
  z-index: 20;
  background: var(--neon);
  color: var(--ink);
  padding: 8px 12px;
  border-radius: 10px;
}

.wrap {
  width: min(var(--max), calc(100% - 40px));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(18px);
  background: rgba(255, 255, 255, 0.78);
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 76px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
  font-family: var(--display);
  font-weight: 800;
  letter-spacing: -0.03em;
}

.brand img {
  width: 36px;
  height: 36px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
}

.nav-links a[aria-current="page"],
.nav-links a:hover {
  color: var(--ink);
  box-shadow: inset 0 -2px 0 var(--neon);
}

.lang-toggle {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 999px;
  overflow: hidden;
}

.lang-toggle button {
  border: 0;
  background: transparent;
  color: var(--muted);
  padding: 6px 10px;
  cursor: pointer;
  font: inherit;
  font-weight: 600;
}

.lang-toggle button[aria-pressed="true"] {
  background: var(--neon);
  color: var(--ink);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 999px;
  padding: 12px 20px;
  font-weight: 700;
  text-decoration: none;
  border: 1px solid transparent;
  letter-spacing: -0.01em;
}

.btn-gold {
  background: var(--neon);
  color: var(--ink);
}

.btn-gold:hover {
  color: var(--ink);
  box-shadow: 0 0 0 4px var(--neon-dim), 0 12px 28px rgba(18, 224, 160, 0.32);
}

.btn-ghost {
  border-color: var(--line);
  color: var(--ink);
  background: transparent;
}

.btn-ghost:hover {
  color: var(--ink);
  border-color: var(--neon);
  box-shadow: 0 0 0 3px var(--neon-dim);
}

.hero {
  position: relative;
  padding: 88px 0 56px;
  overflow: hidden;
}

.dial {
  position: absolute;
  right: -140px;
  top: -120px;
  width: min(680px, 82vw);
  aspect-ratio: 1;
  border-radius: 50%;
  pointer-events: none;
  border: 0;
  background:
    radial-gradient(circle at 42% 46%, rgba(18, 224, 160, 0.55) 0%, rgba(18, 224, 160, 0.12) 38%, transparent 68%);
  filter: blur(18px);
}

.dial::after {
  content: "";
  position: absolute;
  width: 46%;
  height: 46%;
  right: 8%;
  bottom: 10%;
  border-radius: 50%;
  border: 0;
  background: radial-gradient(circle, rgba(18, 224, 160, 0.35), transparent 70%);
}

.eyebrow {
  color: var(--teal);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 0.78rem;
  font-weight: 700;
  margin: 0 0 16px;
}

h1, h2, h3 {
  font-family: var(--display);
  line-height: 1.12;
  letter-spacing: -0.04em;
  margin: 0 0 14px;
  color: var(--ink);
}

h1 {
  font-size: clamp(2.3rem, 5.4vw, 4.4rem);
  max-width: 18ch;
  font-weight: 800;
}

h2 {
  font-weight: 800;
}

h3 {
  font-weight: 700;
  letter-spacing: -0.03em;
}

.lede {
  max-width: 44rem;
  color: var(--muted);
  font-size: 1.12rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 56px 0 8px;
}

.fact {
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 22px;
}

.fact strong {
  display: block;
  font-family: var(--display);
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--teal);
}

.section {
  padding: 72px 0;
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 16px;
  margin-bottom: 32px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 22px;
}

.app-card {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 6px);
  overflow: hidden;
  box-shadow: none;
  display: flex;
  flex-direction: column;
}

.app-card .cover {
  height: 176px;
  object-fit: cover;
  width: 100%;
  background: var(--bg-soft);
}

.app-card .body {
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}

.app-meta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.app-meta img {
  width: 52px;
  height: 52px;
  border-radius: 16px;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  font-size: 0.78rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 10px;
  color: var(--muted);
}

.card-actions {
  display: flex;
  gap: 10px;
  margin-top: auto;
  padding-top: 8px;
}

.split {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 32px;
  align-items: start;
}

.panel {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
}

.checklist {
  margin: 0;
  padding: 0;
  list-style: none;
}

.checklist li {
  padding: 12px 0 12px 28px;
  position: relative;
  border-bottom: 1px solid var(--line);
}

.checklist li::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--neon);
  box-shadow: 0 0 12px rgba(18, 224, 160, 0.7);
  position: absolute;
  left: 0;
  top: 18px;
}

.faq details {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 16px 20px;
  margin-bottom: 10px;
}

.faq details[open] {
  border-color: rgba(18, 224, 160, 0.45);
  box-shadow: 0 0 0 3px var(--neon-dim);
}

.faq summary {
  cursor: pointer;
  font-weight: 700;
  font-family: var(--display);
  letter-spacing: -0.02em;
}

.faq p {
  color: var(--muted);
  margin: 10px 0 4px;
}

form {
  display: grid;
  gap: 14px;
}

label {
  display: grid;
  gap: 6px;
  font-size: 0.92rem;
}

input, select, textarea {
  font: inherit;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px 14px;
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--neon);
  box-shadow: 0 0 0 3px var(--neon-dim);
}

textarea {
  min-height: 140px;
  resize: vertical;
}

.honeypot {
  position: absolute;
  left: -9999px;
  opacity: 0;
  height: 0;
  width: 0;
}

.form-note {
  color: var(--muted);
  font-size: 0.9rem;
}

.form-status {
  min-height: 1.4em;
  font-weight: 600;
}

.form-status.ok { color: var(--ok); }
.form-status.err { color: var(--danger); }

.app-hero {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 22px;
  align-items: center;
}

.app-hero img.icon {
  width: 96px;
  height: 96px;
  border-radius: 28px;
}

.site-footer {
  position: relative;
  overflow: hidden;
  border-top: 0;
  padding: 48px 0 56px;
  color: rgba(255, 255, 255, 0.68);
  font-size: 0.92rem;
  background:
    radial-gradient(620px 380px at 100% 120%, rgba(18, 224, 160, 0.28), transparent 58%),
    var(--dark);
}

.site-footer a {
  color: var(--neon);
}

.site-footer a:hover {
  color: #fff;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 24px;
}

.kicker {
  color: var(--teal);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 700;
  margin-bottom: 8px;
}

@media (max-width: 840px) {
  .facts, .split, .footer-grid, .app-hero {
    grid-template-columns: 1fr;
  }

  .nav-links {
    display: none;
  }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    right: 20px;
    top: 76px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 14px;
    box-shadow: var(--shadow);
  }

  .nav-links.open a[aria-current="page"],
  .nav-links.open a:hover {
    box-shadow: none;
    color: var(--teal);
  }

  .menu-btn {
    display: inline-flex;
  }

  .dial {
    opacity: 0.55;
  }
}

.menu-btn {
  display: none;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--ink);
  border-radius: 12px;
  padding: 8px 10px;
}

.thanks {
  min-height: 50vh;
  display: grid;
  place-items: center;
  text-align: center;
}

.cover-wide {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  margin: 24px 0 8px;
}