:root {
  color-scheme: light;
  --sky-50: #f6fbff;
  --sky-100: #eaf6ff;
  --sky-200: #d7ebfb;
  --blue-500: #6689d8;
  --blue-600: #5274c7;
  --ink: #17243a;
  --muted: #617089;
  --line: rgba(103, 137, 176, 0.2);
  --surface: rgba(255, 255, 255, 0.9);
  --shadow: 0 20px 60px rgba(73, 112, 152, 0.13);
}

* { box-sizing: border-box; }

html {
  background: var(--sky-50);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Noto Sans KR", sans-serif;
  color: var(--ink);
  line-height: 1.65;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 12% 8%, rgba(198, 231, 255, 0.74), transparent 34rem),
    radial-gradient(circle at 92% 22%, rgba(220, 240, 255, 0.78), transparent 30rem),
    linear-gradient(180deg, #f8fcff 0%, #eef8ff 60%, #f9fcff 100%);
}

a { color: var(--blue-600); }
a:focus-visible { outline: 3px solid rgba(82, 116, 199, 0.35); outline-offset: 4px; }

.shell {
  width: min(760px, calc(100% - 32px));
  margin: 0 auto;
  padding: 24px 0 56px;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 56px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-size: 1.08rem;
  font-weight: 760;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.cloud {
  position: relative;
  width: 38px;
  height: 24px;
  border-radius: 999px;
  background: white;
  box-shadow: 0 6px 20px rgba(72, 121, 166, 0.16);
}

.cloud::before,
.cloud::after {
  position: absolute;
  content: "";
  border-radius: 50%;
  background: white;
}

.cloud::before { width: 18px; height: 18px; left: 6px; top: -8px; }
.cloud::after { width: 14px; height: 14px; right: 5px; top: -5px; }

.nav-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 16px; }
.nav-links a { color: var(--muted); font-size: 0.9rem; font-weight: 650; text-decoration: none; }

.hero,
.paper {
  margin-top: 34px;
  border: 1px solid var(--line);
  border-radius: 30px;
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.hero { padding: clamp(34px, 8vw, 72px); text-align: center; }
.paper { padding: clamp(26px, 6vw, 54px); }

.eyebrow {
  display: inline-flex;
  padding: 7px 13px;
  border-radius: 999px;
  background: var(--sky-100);
  color: var(--blue-600);
  font-size: 0.78rem;
  font-weight: 750;
  letter-spacing: 0.04em;
}

h1, h2, h3 { line-height: 1.25; letter-spacing: -0.035em; }
h1 { margin: 18px 0 12px; font-size: clamp(2.1rem, 8vw, 4rem); }
h2 { margin: 34px 0 10px; font-size: 1.25rem; }
h3 { margin: 22px 0 6px; font-size: 1rem; }
p { margin: 0 0 14px; }
ul { padding-left: 1.3rem; }
li + li { margin-top: 6px; }

.lede { max-width: 560px; margin: 0 auto; color: var(--muted); font-size: 1.05rem; }
.meta { color: var(--muted); font-size: 0.88rem; }

.actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: white;
  color: var(--blue-600);
  font-weight: 720;
  text-decoration: none;
}

.button.primary { border-color: transparent; background: var(--blue-500); color: white; }

.notice {
  margin: 24px 0;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--sky-100);
}

footer { padding: 30px 4px 0; color: var(--muted); font-size: 0.82rem; text-align: center; }

@media (max-width: 560px) {
  .shell { width: min(100% - 20px, 760px); padding-top: 12px; }
  .nav { align-items: flex-start; padding: 4px 6px; }
  .nav-links { gap: 10px; }
  .hero, .paper { margin-top: 20px; border-radius: 24px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; }
}