:root {
  color-scheme: light;
  --page: #ffffff;
  --section: #f5f5f7;
  --surface: #ffffff;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --link: #007aff;
  --border: #d2d2d7;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.06), 0 10px 30px rgba(0, 0, 0, 0.06);
  --radius: 18px;
  --radius-sm: 14px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", sans-serif;
  line-height: 1.55;
  background: var(--page);
  color: var(--text);
}

.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 28px 18px 60px;
}

header {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 22px;
}

header h1 {
  font-size: 22px;
  margin: 0;
  letter-spacing: -0.02em;
}

header .subtitle {
  color: var(--muted);
  font-size: 14px;
}

.nav {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-left: auto;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav a {
  color: var(--muted);
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 7px 10px;
  border-radius: 999px;
  font-size: 12px;
}

.nav a:hover {
  text-decoration: none;
  color: var(--text);
}

.card {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius);
  padding: 18px 18px;
  box-shadow: none;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 14px;
}

h2 { margin: 0 0 10px; font-size: 18px; letter-spacing: -0.01em; }
h3 { margin: 18px 0 8px; font-size: 16px; letter-spacing: -0.01em; }
p { margin: 10px 0; color: var(--text); }
ul { margin: 10px 0 0; padding-left: 18px; }
li { margin: 6px 0; color: var(--text); }

a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }

footer {
  margin-top: 18px;
  color: var(--muted);
  font-size: 12px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.pill {
  display: inline-block;
  border: 1px solid var(--border);
  padding: 7px 10px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 12px;
  background: var(--surface);
}

.hero {
  margin: 8px 0 18px;
  padding: 34px 26px;
  border-radius: 24px;
  background: var(--section);
  border: 1px solid rgba(0, 0, 0, 0.02);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 18px;
  align-items: center;
}

.hero-copy { min-width: 0; }

.mock {
  background: var(--surface);
  border: 1px solid rgba(0, 0, 0, 0.10);
  border-radius: 24px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.mock-top {
  height: 46px;
  background: #fbfbfd;
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
  position: relative;
}

.mock-dots {
  position: absolute;
  left: 14px;
  display: flex;
  gap: 6px;
}

.mock-dots span {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.14);
}

.mock-body {
  padding: 14px;
  background: #ffffff;
}

.mock-card {
  border: 1px solid rgba(0, 0, 0, 0.10);
  border-radius: 16px;
  padding: 12px;
  background: #ffffff;
  margin-bottom: 10px;
}

.mock-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.mock-title {
  font-weight: 700;
  letter-spacing: -0.01em;
  font-size: 13px;
}

.mock-sub {
  color: var(--muted);
  font-size: 12px;
  margin-top: 6px;
}

.mock-pill {
  border: 1px solid rgba(0, 0, 0, 0.12);
  background: #f2f2f7;
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 12px;
  color: var(--text);
  font-weight: 600;
  white-space: nowrap;
}

.mock-bar {
  height: 10px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.06);
  margin-top: 10px;
}

.mock-bar.fill {
  width: 64%;
  background: rgba(0, 122, 255, 0.18);
  border: 1px solid rgba(0, 122, 255, 0.18);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.85);
  padding: 7px 12px;
  border-radius: 999px;
  font-size: 12px;
  color: var(--muted);
}

.hero h1 {
  font-size: 44px;
  letter-spacing: -0.04em;
  margin: 14px 0 10px;
  line-height: 1.05;
}

.hero p {
  color: var(--muted);
  margin: 0;
  max-width: 72ch;
  font-size: 16px;
}

.cta-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 14px;
  padding: 11px 14px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
}

.btn:hover {
  text-decoration: none;
  border-color: rgba(0, 0, 0, 0.18);
}

.btn.primary {
  background: var(--link);
  border-color: var(--link);
  color: #ffffff;
}

.btn.primary:hover { opacity: 0.95; }

.btn.secondary {
  background: transparent;
}

.btn.is-disabled {
  opacity: 0.55;
  cursor: not-allowed;
  pointer-events: none;
}

.is-hidden { display: none !important; }

.kicker {
  display: inline-block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 12px;
}

.feature-list {
  margin-top: 10px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
}

.feature {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius-sm);
  padding: 16px 16px;
  box-shadow: none;
}

.feature h3 {
  margin: 0 0 6px;
  font-size: 15px;
}

.feature p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.section-title {
  margin: 22px 0 10px;
  font-size: 18px;
}

.split {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 14px;
  margin-top: 14px;
}

.panel {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius-sm);
  padding: 16px 16px;
}

.panel h3 { margin-top: 0; }

.steps {
  margin-top: 10px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.step {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  padding: 14px 14px;
}

.step .num {
  width: 28px;
  height: 28px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 13px;
  background: var(--section);
  border: 1px solid rgba(0, 0, 0, 0.06);
  color: var(--text);
}

.step h3 { margin: 10px 0 6px; }
.step p { margin: 0; color: var(--muted); font-size: 13px; }

.icon {
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: var(--section);
  border: 1px solid rgba(0, 0, 0, 0.06);
  margin-bottom: 10px;
}

.icon svg {
  width: 18px;
  height: 18px;
  stroke: #1d1d1f;
  stroke-width: 1.8;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

@media (max-width: 720px) {
  .hero { padding: 26px 18px; }
  .hero h1 { font-size: 34px; }
  .hero-grid { grid-template-columns: 1fr; }
  .mock { order: 2; }
  .split { grid-template-columns: 1fr; }
}