/* virtuonweb.com landing — v2 (2026-09-30). Grid system borrowed from Jazzly:
   ivory paper, navy ink, 1px rules, square corners, one accent color per app. */
:root {
  --paper: #FAF7F1;
  --surface: #FFFFFF;
  --ink: #1A1C27;
  --ink-2: #4B4E5C;
  --ink-3: #8B8D98;
  --line: #E3DDD0;
  --line-2: #D6CFC0;
  --night: #232A45;
  --font: 'Pretendard Variable', Pretendard, -apple-system, BlinkMacSystemFont, system-ui, 'Segoe UI', Roboto, sans-serif;
  --c-cafe: #9A6B3F;
  --c-calc: #2F5DA8;
  --c-finance: #2E7D5B;
  --c-twonight: #6B4FB3;
  --c-chartscope: #1F8A96;
  --c-jazzly: #D9573B;
  --c-kagongmate: #2F6F5E;
}
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body { background: var(--paper); color: var(--ink); font-family: var(--font); font-size: 16px; line-height: 1.55; -webkit-font-smoothing: antialiased; word-break: keep-all; overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* ── header ─────────────────────────────── */
.top { position: sticky; top: 0; z-index: 50; background: var(--paper); border-bottom: 1px solid var(--ink); }
.top-inner { display: flex; align-items: stretch; justify-content: space-between; min-height: 64px; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; flex: 0 0 auto; }
.brand-mark { display: inline-grid; place-items: center; width: 30px; height: 30px; background: var(--night); color: #fff; font-weight: 900; font-size: 17px; }
.brand-name { font-weight: 800; font-size: 18px; letter-spacing: -0.02em; }
.nav { display: flex; align-items: stretch; font-size: 14.5px; font-weight: 600; }
.nav a { display: flex; align-items: center; padding: 0 13px; color: var(--ink-3); border-bottom: 3px solid transparent; margin-bottom: -1px; white-space: nowrap; }
.nav a:hover { color: var(--ink); border-bottom-color: var(--ink); }

/* ── hero ───────────────────────────────── */
.hero { padding: 64px 0 40px; }
.hero-title { margin: 0; font-size: clamp(40px, 7vw, 76px); font-weight: 900; letter-spacing: -0.045em; line-height: 1.04; color: var(--night); }
.hero-sub { margin: 20px 0 0; max-width: 620px; font-size: 18px; color: var(--ink-2); }
.formula { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr auto 1.35fr; margin: 40px 0 0; border-top: 1px solid var(--ink); border-bottom: 1px solid var(--line-2); }
.formula > div { padding: 14px 16px 14px 0; }
.formula > div + div { padding-left: 16px; border-left: 1px solid var(--line-2); }
.formula dt { font-size: 22px; font-weight: 800; letter-spacing: -0.02em; color: var(--ink); }
.formula dd { margin: 2px 0 0; font-size: 12.5px; font-weight: 600; color: var(--ink-3); }
.formula .op { display: flex; align-items: center; justify-content: center; padding: 0 14px; font-size: 20px; font-weight: 700; color: var(--ink-3); }
.formula .result dt { color: var(--c-jazzly); }

/* ── apps grid ──────────────────────────── */
.apps { padding: 24px 0 72px; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; padding-bottom: 12px; border-bottom: 2px solid var(--ink); }
.section-title { margin: 0; font-size: 22px; font-weight: 800; letter-spacing: -0.02em; }
.section-count { font-size: 14px; font-weight: 800; color: var(--ink-3); font-variant-numeric: tabular-nums; }
.grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-left: 1px solid var(--line-2); }
.card { position: relative; display: flex; flex-direction: column; min-height: 250px; padding: 26px 24px 22px; background: transparent; border-right: 1px solid var(--line-2); border-bottom: 1px solid var(--line-2); transition: background .15s ease; }
.card::before { content: ''; position: absolute; left: 0; right: 0; top: 0; height: 3px; background: var(--accent, var(--ink)); transform: scaleX(0); transform-origin: left; transition: transform .2s ease; }
.card:hover { background: var(--surface); }
.card:hover::before { transform: scaleX(1); }
.card-no { font-size: 34px; font-weight: 900; letter-spacing: -0.04em; line-height: 1; color: var(--accent, var(--ink)); font-variant-numeric: tabular-nums; }
.card-title { margin: 20px 0 0; font-size: 22px; font-weight: 800; letter-spacing: -0.02em; color: var(--ink); }
.card-desc { margin: 8px 0 0; font-size: 15px; color: var(--ink-2); }
.card-cta { margin-top: auto; padding-top: 22px; font-size: 14px; font-weight: 700; color: var(--ink); }
.card:hover .card-cta { text-decoration: underline; text-underline-offset: 4px; }
.card--cafe { --accent: var(--c-cafe); }
.card--calc { --accent: var(--c-calc); }
.card--finance { --accent: var(--c-finance); }
.card--twonight { --accent: var(--c-twonight); }
.card--chartscope { --accent: var(--c-chartscope); }
.card--jazzly { --accent: var(--c-jazzly); }
.card--kagongmate { --accent: var(--c-kagongmate); }

/* ── footer ─────────────────────────────── */
.foot { border-top: 1px solid var(--ink); }
.foot-inner { display: flex; justify-content: space-between; gap: 16px; padding: 20px 24px 32px; font-size: 13px; color: var(--ink-3); }
.foot-brand { font-weight: 800; color: var(--ink); }

/* ── responsive ─────────────────────────── */
@media (max-width: 980px) {
  .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .nav a { padding: 0 9px; font-size: 13.5px; }
}
/* Mobile: the nav becomes a 3-column link grid under the brand — never overflows or wraps mid-word. */
@media (max-width: 760px) {
  .wrap { padding: 0 16px; }
  .top { position: static; }
  .top-inner { flex-direction: column; align-items: stretch; gap: 0; min-height: 0; padding: 0 16px 14px; }
  .brand { padding: 14px 0; }
  .nav { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--line-2); border-left: 1px solid var(--line-2); margin: 0; }
  .nav a { justify-content: center; padding: 11px 4px; margin: 0; font-size: 13.5px; color: var(--ink-2); border-bottom: 1px solid var(--line-2); border-right: 1px solid var(--line-2); overflow: hidden; text-overflow: ellipsis; }
  .nav a:hover { border-bottom-color: var(--line-2); background: var(--surface); }
  .hero { padding: 36px 0 28px; }
  .hero-sub { font-size: 16px; }
  .formula { grid-template-columns: 1fr 1fr 1fr; }
  .formula .op { display: none; }
  .formula > div { padding: 12px 10px 12px 0; }
  .formula > div + div { padding-left: 10px; }
  .formula .result { grid-column: 1 / -1; padding-left: 0 !important; border-left: 0 !important; border-top: 1px solid var(--line-2); }
  .formula dt { font-size: 18px; }
  .grid { grid-template-columns: 1fr; }
  .card { min-height: 0; padding: 20px 18px; }
  .card-no { font-size: 26px; }
  .card-title { margin-top: 12px; font-size: 20px; }
  .card-cta { padding-top: 14px; }
  .foot-inner { flex-direction: column; gap: 4px; padding: 18px 16px 28px; }
}