/* Atto — one stylesheet for all three locales. Kept external and small so every page
   after the first is a single cached request; Core Web Vitals is real SEO. */
:root {
  --bg: #000; --raised: #17171a; --sheet: #0c0c0e;
  --label: #fff; --label2: rgba(255,255,255,.62); --label3: rgba(255,255,255,.38);
  --sep: rgba(255,255,255,.1);
  --green: #30d158; --green-l: #5be37c; --orange: #ff9f0a; --cyan: #64d2ff;
  --maxw: 960px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--label);
  font: 400 17px/1.65 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI",
        "Apple SD Gothic Neo", "Hiragino Sans", "Noto Sans KR", "Noto Sans JP",
        Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--green-l); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* The brand mark: the icon's luminous seam, as a rule the layout hangs off. */
.seam {
  width: 3px; align-self: stretch; min-height: 26px; border-radius: 2px;
  background: linear-gradient(to bottom, rgba(240,255,246,.25), #f0fff6 40%,
                                          #f0fff6 60%, rgba(240,255,246,.25));
  box-shadow: 0 0 14px 2px rgba(48,209,88,.55);
}
header { padding: 20px 0; }
.bar { display: flex; align-items: center; gap: 12px; }
.brand { font-weight: 600; font-size: 19px; letter-spacing: -.01em; }
.bar nav { margin-left: auto; display: flex; gap: 16px; font-size: 14px; }
.bar nav a { color: var(--label3); }

.hero { padding: 60px 0 70px; text-align: center; position: relative; }
.hero h1 {
  margin: 0 0 16px; font-size: clamp(33px, 6vw, 58px); line-height: 1.1;
  font-weight: 600; letter-spacing: -.025em;
}
.hero h1 em { font-style: normal; color: var(--green); }
.hero .lede { margin: 0 auto 32px; max-width: 620px; font-size: clamp(16px,2.1vw,19px); color: var(--label2); }
.cta {
  display: inline-flex; align-items: center; gap: 8px; background: var(--green);
  color: #000; font-weight: 600; font-size: 17px; padding: 15px 30px; border-radius: 999px;
}
.cta:hover { text-decoration: none; filter: brightness(1.08); }
.cta-note { margin-top: 12px; font-size: 14px; color: var(--label3); }

.metrics { display: grid; grid-template-columns: repeat(3,1fr); gap: 12px; margin-top: 54px; }
.metric { background: var(--raised); border-radius: 18px; padding: 22px 16px; }
.metric b {
  display: block; font-size: clamp(23px,3.6vw,32px); font-weight: 600;
  font-variant-numeric: tabular-nums; letter-spacing: -.01em;
}
.metric span { display: block; margin-top: 6px; font-size: 13px; color: var(--label3); }

section { padding: 62px 0; border-top: 1px solid var(--sep); }
h2 { margin: 0 0 8px; font-size: clamp(24px,3.2vw,31px); font-weight: 600; letter-spacing: -.02em; }
.sub { margin: 0 0 34px; color: var(--label2); max-width: 660px; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(262px,1fr)); gap: 14px; }
.card { background: var(--raised); border-radius: 20px; padding: 24px; }
.card h3 { margin: 0 0 8px; font-size: 17px; font-weight: 600; }
.card p { margin: 0; font-size: 15px; color: var(--label2); }
.tag {
  display: inline-block; margin-bottom: 12px; padding: 4px 10px; border-radius: 999px;
  background: rgba(48,209,88,.14); color: var(--green-l);
  font-size: 11px; font-weight: 600; letter-spacing: .05em; text-transform: uppercase;
}
.tag.warn { background: rgba(255,159,10,.14); color: var(--orange); }
.tag.cool { background: rgba(100,210,255,.14); color: var(--cyan); }

.scroller { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 15px; min-width: 560px; }
caption { text-align: left; color: var(--label3); font-size: 13px; padding-bottom: 12px; }
th, td { padding: 14px 12px; text-align: left; border-bottom: 1px solid var(--sep); vertical-align: top; }
thead th { font-size: 13px; color: var(--label3); font-weight: 600; }
tbody th { font-weight: 400; color: var(--label2); }
td.ours { color: var(--label); font-weight: 500; }

details { border-bottom: 1px solid var(--sep); padding: 18px 0; }
details summary {
  cursor: pointer; font-weight: 500; font-size: 17px; list-style: none;
  display: flex; justify-content: space-between; gap: 16px;
}
details summary::-webkit-details-marker { display: none; }
details summary::after { content: "+"; color: var(--label3); font-weight: 400; }
details[open] summary::after { content: "\2212"; }
details p { margin: 14px 0 0; color: var(--label2); font-size: 15px; }

footer { padding: 44px 0 60px; border-top: 1px solid var(--sep); color: var(--label3); font-size: 14px; }
footer nav { display: flex; flex-wrap: wrap; gap: 18px; margin-bottom: 16px; }

@media (max-width: 560px) { .metrics { grid-template-columns: 1fr; } }

/* Legal and support pages. Same palette, narrower measure so long prose stays readable. */
.doc { max-width: 720px; margin: 0 auto; padding: 48px 24px 96px; }
.doc h1 { font-size: clamp(30px,5vw,44px); font-weight: 600; letter-spacing: -.025em; margin: 0 0 10px; }
.doc .updated { color: var(--label3); font-size: 14px; margin: 0 0 40px; }
.doc h2 { font-size: clamp(19px,2.6vw,23px); margin: 40px 0 10px; }
.doc h3 { font-size: 17px; font-weight: 600; margin: 26px 0 6px; color: var(--green-l); }
.doc p, .doc li { color: var(--label2); }
.doc strong { color: var(--label); font-weight: 600; }
.doc ul { padding-left: 20px; }
.doc li { margin: 6px 0; }
.doc table { width: 100%; border-collapse: collapse; margin: 14px 0 6px; font-size: 15px; }
.doc th, .doc td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--sep); vertical-align: top; }
.doc th { color: var(--label3); font-weight: 600; font-size: 13px; }
.doc td { color: var(--label2); }
.doc .note { background: var(--raised); border-radius: 14px; padding: 16px 18px; margin: 18px 0; }
.doc .note p { margin: 0; }
footer.doc-foot { border-top: 1px solid var(--sep); padding: 26px 24px 60px; text-align: center; color: var(--label3); font-size: 14px; }
footer.doc-foot a { color: var(--label3); }