:root {
  --accent: #4f46e5;
  --accent-weak: #eef0fe;
  --ink: #1f2330;
  --muted: #6b7180;
  --line: #e7e8ee;
  --bg: #ffffff;
  --sidebar: #fafbfc;
  --code-bg: #f5f6f8;
  --radius: 10px;
  --maxw: 1180px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", "Apple SD Gothic Neo", Roboto, sans-serif;
  color: var(--ink);
  background: var(--bg);
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Top bar */
.topbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; gap: 20px;
  padding: 12px 24px;
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 700; font-size: 18px; }
.brand:hover { text-decoration: none; }
.brand em { color: var(--muted); font-style: normal; font-weight: 500; }
.logo { width: 30px; height: 30px; color: var(--accent); }
.search {
  margin-left: auto; width: min(320px, 40vw);
  padding: 8px 14px; border: 1px solid var(--line); border-radius: 999px;
  background: #fff; font-size: 14px; outline: none;
}
.search:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-weak); }

/* Shell */
.shell { display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: 0; max-width: var(--maxw); margin: 0 auto; }

.sidebar {
  position: sticky; top: 57px; align-self: start;
  height: calc(100vh - 57px); overflow-y: auto;
  padding: 24px 16px; border-right: 1px solid var(--line); background: var(--sidebar);
}
.navhead { margin: 18px 8px 6px; font-size: 12px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.navhead:first-child { margin-top: 0; }
.sidebar a { display: block; padding: 6px 10px; border-radius: 7px; color: var(--ink); font-size: 14px; }
.sidebar a:hover { background: var(--accent-weak); text-decoration: none; }

/* Content */
.content { padding: 36px 48px 80px; min-width: 0; }
.content section { scroll-margin-top: 72px; padding-bottom: 8px; }
h1 { font-size: 32px; margin: 0 0 12px; letter-spacing: -.01em; }
h2 { font-size: 22px; margin: 40px 0 12px; padding-top: 8px; }
.lead { font-size: 18px; color: #3a3f4c; }
p, li { color: #2b3040; }
ol, ul { padding-left: 22px; }
li { margin: 5px 0; }
.steps { counter-reset: step; list-style: none; padding-left: 0; }
.steps li { position: relative; padding: 10px 0 10px 44px; border-bottom: 1px solid var(--line); }
.steps li::before {
  counter-increment: step; content: counter(step);
  position: absolute; left: 0; top: 9px; width: 28px; height: 28px;
  display: grid; place-items: center; border-radius: 50%;
  background: var(--accent); color: #fff; font-weight: 700; font-size: 14px;
}

kbd { background: #fff; border: 1px solid var(--line); border-bottom-width: 2px; border-radius: 6px; padding: 1px 7px; font-size: 13px; font-family: inherit; }
code { background: var(--code-bg); padding: 2px 6px; border-radius: 5px; font-size: 14px; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
pre { background: var(--code-bg); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; overflow-x: auto; }
pre code { background: none; padding: 0; font-size: 13px; line-height: 1.7; }

table { width: 100%; border-collapse: collapse; margin: 14px 0; font-size: 15px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-size: 13px; text-transform: uppercase; letter-spacing: .04em; }

.tip, .note { border-radius: var(--radius); padding: 12px 16px; margin: 16px 0; font-size: 15px; }
.tip { background: var(--accent-weak); border: 1px solid #d9ddfb; }
.note { background: #fff8e6; border: 1px solid #f3e3b0; }

dl dt { font-weight: 700; margin-top: 14px; }
dl dd { margin: 4px 0 0; color: var(--muted); }

.foot { margin-top: 56px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }

@media (max-width: 820px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar { position: static; height: auto; border-right: none; border-bottom: 1px solid var(--line); }
  .content { padding: 28px 22px 60px; }
  .search { display: none; }
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e8eaf0; --muted: #9aa0ad; --line: #2a2d36; --bg: #15171c;
    --sidebar: #181b21; --code-bg: #1e2128; --accent-weak: #20233a;
  }
  body { background: var(--bg); }
  .topbar { background: rgba(21,23,28,.86); }
  .search, kbd { background: #1e2128; color: var(--ink); }
  .lead, p, li { color: #cdd1da; }
  .note { background: #2a2410; border-color: #4a401c; }
}

/* ───────────────────────── 랜딩(홈) ───────────────────────── */
.landing { margin: 0; }
.landing h1, .landing h2, .landing h3 { letter-spacing: -.02em; }

/* nav */
.nav {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px clamp(20px, 5vw, 56px);
  background: rgba(255,255,255,.82); backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav .brand { font-size: 19px; font-weight: 800; gap: 9px; }
.nav .logo { width: 28px; height: 28px; color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 22px; }
.nav-links a { color: var(--ink); font-weight: 600; font-size: 15px; }
.nav-links a:hover { color: var(--accent); text-decoration: none; }

/* buttons */
.btn { display: inline-flex; align-items: center; gap: 8px; border-radius: 999px; font-weight: 700; cursor: pointer; transition: transform .08s, box-shadow .2s, background .2s; border: 1px solid transparent; }
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 6px 20px -8px var(--accent); }
.btn-primary:hover { text-decoration: none; transform: translateY(-1px); box-shadow: 0 10px 26px -8px var(--accent); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { text-decoration: none; border-color: var(--accent); color: var(--accent); }
.btn-sm { padding: 8px 16px; font-size: 14px; }
.btn-lg { padding: 14px 26px; font-size: 17px; }
.btn-block { display: flex; justify-content: center; width: 100%; }
.btn-sub { font-weight: 500; opacity: .8; font-size: .82em; }

/* hero */
.hero {
  max-width: var(--maxw); margin: 0 auto; padding: clamp(48px, 8vw, 96px) clamp(20px, 5vw, 56px);
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; align-items: center;
}
.hero h1 { font-size: clamp(36px, 6vw, 60px); line-height: 1.05; margin: 0 0 18px; }
.hero .lead { font-size: clamp(17px, 2.2vw, 21px); color: #3a3f4c; max-width: 30em; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 14px; }
.hero-note { color: var(--muted); font-size: 14px; }
.hero-art { display: grid; place-items: center; }
.hero-cloud { width: clamp(160px, 26vw, 240px); aspect-ratio: 1; color: var(--accent);
  background: radial-gradient(closest-side, var(--accent-weak), transparent 72%); display: grid; place-items: center; animation: floaty 5s ease-in-out infinite; }
.hero-cloud svg { width: 64%; filter: drop-shadow(0 16px 28px rgba(79,70,229,.32)); }
.hero-disk { margin-top: 10px; font-size: 14px; font-weight: 700; color: var(--accent);
  background: var(--accent-weak); border: 1px solid #d9ddfb; padding: 8px 16px; border-radius: 999px; }
@keyframes floaty { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

/* trust strip */
.strip { display: flex; flex-wrap: wrap; justify-content: center; gap: clamp(18px, 5vw, 52px);
  padding: 18px 20px; border-block: 1px solid var(--line); color: var(--muted); font-weight: 700; letter-spacing: .02em; }

/* sections */
.features, .why, .pricing, .faq, .cta-final { max-width: var(--maxw); margin: 0 auto; padding: clamp(56px, 9vw, 96px) clamp(20px, 5vw, 56px); }
.features h2, .why h2, .pricing h2, .faq h2 { font-size: clamp(26px, 4vw, 36px); text-align: center; margin: 0 0 40px; }

.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 20px; }
.feature { background: var(--bg); border: 1px solid var(--line); border-radius: 16px; padding: 24px; transition: border-color .2s, transform .12s; }
.feature:hover { border-color: var(--accent); transform: translateY(-2px); }
.feature .fi { font-size: 28px; }
.feature h3 { margin: 12px 0 6px; font-size: 18px; }
.feature p { margin: 0; color: var(--muted); font-size: 15px; }

.why { background: var(--sidebar); max-width: none; }
.why-grid { max-width: var(--maxw); margin: 0 auto; display: grid; grid-template-columns: repeat(auto-fit, minmax(240px,1fr)); gap: 28px; }
.why-item h3 { font-size: 20px; margin: 0 0 8px; }
.why-item p { color: var(--muted); margin: 0; }

/* pricing */
.price-card { max-width: 440px; margin: 0 auto; background: var(--bg); border: 1px solid var(--line); border-radius: 20px; padding: 32px; box-shadow: 0 24px 60px -28px rgba(31,35,48,.25); }
.price-head { text-align: center; padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.price-name { color: var(--muted); font-weight: 700; }
.price-amount { font-size: 48px; font-weight: 800; margin-top: 6px; }
.price-period { font-size: 18px; font-weight: 600; color: var(--muted); }
.price-list { list-style: none; padding: 0; margin: 22px 0; display: grid; gap: 12px; }
.price-list li { color: #2b3040; }
.price-fine { text-align: center; color: var(--muted); font-size: 13px; margin: 12px 0 0; }
.price-note { text-align: center; font-size: 14px; background: #fff8e6; border: 1px solid #f3e3b0; border-radius: 10px; padding: 10px 14px; margin: 14px 0 0; }

/* faq */
.faq { max-width: 760px; }
.faq dt { font-weight: 700; margin-top: 20px; font-size: 17px; }
.faq dd { margin: 6px 0 0; color: var(--muted); }

/* final cta */
.cta-final { text-align: center; }
.cta-final h2 { margin-bottom: 10px; }
.cta-final p { color: var(--muted); margin: 0 0 24px; }

/* footer */
.foot { border-top: 1px solid var(--line); }
.foot-inner { max-width: var(--maxw); margin: 0 auto; padding: 26px clamp(20px,5vw,56px); display: flex; justify-content: space-between; align-items: center; color: var(--muted); font-size: 14px; }
.foot-inner nav { display: flex; gap: 20px; }

@media (max-width: 760px) {
  .hero { grid-template-columns: 1fr; text-align: center; }
  .hero-cta { justify-content: center; }
  .hero .lead { margin-inline: auto; }
  .hero-art { order: -1; }
  .nav-links a:not(.btn) { display: none; }
}

@media (prefers-color-scheme: dark) {
  .nav { background: rgba(21,23,28,.82); }
  .nav-links a { color: var(--ink); }
  .hero .lead, .price-list li { color: #cdd1da; }
  .feature, .price-card { background: #181b21; }
  .btn-ghost { color: var(--ink); }
  .price-note { background: #2a2410; border-color: #4a401c; color: #e8d9a0; }
}