:root {
  --ink: #17202a;
  --ink-deep: #10161d;
  --muted: #687482;
  --line: #dfe4ea;
  --surface: #ffffff;
  --canvas: #f7f8fa;
  --surface-soft: #edf1f6;
  --accent: #4f72e8;
  --accent-soft: #dfe7ff;
  --success: #3b8564;
  --volab-ink: #1a1523;
  --volab-accent: #6b1ee8;
  --volab-soft: #f0e9ff;
  --volab-canvas: #f6f3ff;
  --font: "Avenir Next", Avenir, "Segoe UI", Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--canvas); font-family: var(--font); font-size: 16px; line-height: 1.55; letter-spacing: 0; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid rgba(79, 114, 232, 0.5); outline-offset: 4px; }

.skip-link { position: fixed; top: 12px; left: 12px; z-index: 20; padding: 10px 14px; color: white; background: var(--ink-deep); border-radius: 8px; transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }

.site-header { position: fixed; top: 18px; left: 50%; z-index: 10; display: flex; align-items: center; justify-content: space-between; width: min(1080px, calc(100% - 36px)); min-height: 58px; padding: 0 10px 0 20px; color: white; background: rgba(16, 22, 29, 0.94); border: 1px solid rgba(255, 255, 255, 0.1); border-radius: 16px; box-shadow: 0 12px 35px rgba(35, 48, 63, 0.16); backdrop-filter: blur(16px); transform: translateX(-50%); }
.brand { display: inline-flex; gap: 10px; align-items: center; font-size: 17px; font-weight: 650; }
.brand-mark { display: block; width: 24px; height: 24px; }
nav { display: flex; gap: 4px; align-items: center; }
nav a { padding: 9px 14px; color: rgba(255, 255, 255, 0.76); border-radius: 9px; font-size: 13px; font-weight: 550; transition: color 180ms ease, background 180ms ease; }
nav a:hover { color: white; background: rgba(255, 255, 255, 0.1); }

.product-hero { padding: 142px max(24px, calc((100vw - 1180px) / 2)) 118px; color: var(--volab-ink); text-align: center; overflow: hidden; }
.hero-copy { max-width: 760px; margin: 0 auto 68px; }
.overline, .section-label { margin: 0 0 16px; color: var(--muted); font-size: 12px; font-weight: 650; letter-spacing: 0.08em; text-transform: uppercase; }
.overline { display: inline-flex; gap: 9px; align-items: center; }
.overline span { width: 7px; height: 7px; background: var(--volab-accent); border-radius: 50%; }
h1, h2, h3, p { text-wrap: balance; }
h1 { margin: 0; font-family: Sora, var(--font); font-size: clamp(68px, 8vw, 112px); font-weight: 800; line-height: 0.95; }
.hero-tagline { margin: 24px 0 12px; color: var(--volab-ink); font-family: Sora, var(--font); font-size: clamp(25px, 2.8vw, 38px); font-weight: 700; line-height: 1.2; }
.hero-description { max-width: 660px; margin: 0 auto; color: #4a4358; font-family: Inter, var(--font); font-size: 18px; }
.hero-actions { display: flex; gap: 10px; justify-content: center; margin-top: 30px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 22px; border-radius: 999px; font-family: Inter, var(--font); font-size: 14px; font-weight: 600; transition: transform 180ms ease, background 180ms ease, color 180ms ease; }
.button:active { transform: translateY(1px); }
.button-primary { color: white; background: var(--volab-accent); }
.button-primary:hover { background: #5613c3; transform: translateY(-1px); }
.button-secondary { color: var(--volab-ink); background: var(--volab-soft); }
.button-secondary:hover { color: white; background: var(--volab-ink); }
.hero-note { margin: 16px 0 0; color: #6f6880; font-family: Inter, var(--font); font-size: 12px; }

.product-stage { position: relative; display: grid; place-items: center; max-width: 1120px; min-height: 630px; margin: 0 auto; padding: 52px 58px; background: var(--volab-canvas); border: 1px solid #e7e1f2; border-radius: 40px; overflow: hidden; isolation: isolate; }
.stage-glow { position: absolute; inset: 0; z-index: -1; background: radial-gradient(circle at 12% 14%, rgba(107, 30, 232, 0.12), transparent 34%), radial-gradient(circle at 88% 82%, rgba(107, 30, 232, 0.08), transparent 30%); border-radius: inherit; }
.product-artwork { display: block; width: min(100%, 900px); height: auto; filter: drop-shadow(0 30px 40px rgba(60, 33, 94, 0.18)); }

.feature-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: clamp(24px, 4vw, 54px); max-width: 1080px; margin: 82px auto 0; text-align: left; }
.feature-row article > span { display: grid; place-items: center; width: 24px; height: 24px; color: white; background: var(--volab-accent); border-radius: 50%; font-size: 12px; font-weight: 700; }
.principles-grid article > span { color: var(--accent); font-size: 11px; font-weight: 700; }
.feature-row h2 { margin: 12px 0 8px; font-size: 22px; font-weight: 630; }
.feature-row p { margin: 0; color: #6f6880; font-family: Inter, var(--font); font-size: 14px; text-wrap: pretty; }

.company-intro, .products, .principles { padding: 120px max(24px, calc((100vw - 1120px) / 2)); }
.company-intro { background: white; }
.intro-grid { display: grid; grid-template-columns: 1.35fr 0.65fr; gap: 100px; align-items: start; }
.intro-grid h2 { max-width: 760px; margin: 0; font-size: clamp(46px, 5.5vw, 76px); font-weight: 620; line-height: 1.05; }
.intro-copy { padding-top: 10px; }
.intro-copy p { margin: 0 0 22px; color: var(--muted); font-size: 17px; text-wrap: pretty; }
.products { background: var(--surface-soft); }
.section-heading { max-width: 700px; margin: 0 auto 64px; text-align: center; }
.section-heading h2, .principles-heading h2 { margin: 0; font-size: clamp(42px, 5vw, 64px); font-weight: 630; line-height: 1.08; }
.section-heading > p:last-child { max-width: 520px; margin: 18px auto 0; color: var(--muted); font-size: 17px; }
.product-list { display: grid; grid-template-columns: 1.25fr 0.75fr; gap: 22px; }
.product-card, .future-slot { position: relative; display: flex; min-height: 390px; padding: 42px; overflow: hidden; background: white; border-radius: 24px; }
.product-card { flex-direction: column; align-items: flex-start; }
.product-card::after { position: absolute; right: -60px; bottom: -85px; width: 300px; height: 300px; background: var(--volab-soft); border: 55px solid #d9c7ff; border-radius: 50%; content: ""; }
.product-type, .product-status { font-size: 11px; font-weight: 650; letter-spacing: 0.06em; text-transform: uppercase; }
.product-type { color: var(--volab-accent); }
.product-name { position: relative; z-index: 1; margin: 26px 0 12px; font-size: 54px; font-weight: 650; line-height: 1; }
.product-description { position: relative; z-index: 1; max-width: 470px; margin: 0; color: var(--muted); font-size: 16px; text-wrap: pretty; }
.product-meta { position: relative; z-index: 1; display: flex; gap: 16px; align-items: center; margin-top: auto; }
.product-status { display: inline-flex; gap: 7px; align-items: center; color: var(--muted); }
.product-status::before { width: 7px; height: 7px; background: var(--success); border-radius: 50%; content: ""; }
.product-link { padding: 11px 16px; color: white; background: var(--ink-deep); border-radius: 10px; font-size: 13px; font-weight: 620; transition: background 180ms ease, transform 180ms ease; }
.product-link:hover { background: var(--volab-accent); transform: translateY(-1px); }
.future-slot { flex-direction: column; justify-content: space-between; background: #dce3eb; }
.future-slot span { color: var(--muted); font-size: 11px; font-weight: 650; letter-spacing: 0.06em; text-transform: uppercase; }
.future-slot p { max-width: 300px; margin: 0; font-size: 30px; font-weight: 580; line-height: 1.18; }

.principles { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 100px; background: var(--canvas); }
.principles-heading { position: sticky; top: 110px; align-self: start; }
.principles-grid { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.principles-grid article { min-height: 235px; padding: 32px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.principles-grid h3 { margin: 50px 0 8px; font-size: 21px; font-weight: 630; }
.principles-grid p { margin: 0; color: var(--muted); font-size: 14px; text-wrap: pretty; }

footer { padding: 82px max(24px, calc((100vw - 1120px) / 2)) 30px; color: white; background: var(--ink-deep); }
.footer-main { display: grid; grid-template-columns: 0.7fr 1.2fr 1fr; gap: 50px; align-items: start; min-height: 150px; }
.footer-main p { max-width: 360px; margin: 0; color: rgba(255, 255, 255, 0.55); font-size: 18px; }
.contact-link { justify-self: end; padding-bottom: 3px; border-bottom: 1px solid rgba(255, 255, 255, 0.35); font-size: 17px; transition: color 180ms ease; }
.contact-link:hover, .footer-bottom a:hover { color: #9eb2f5; }
.footer-bottom { display: flex; gap: 26px; padding-top: 24px; color: rgba(255, 255, 255, 0.45); border-top: 1px solid rgba(255, 255, 255, 0.12); font-size: 12px; }
.footer-bottom span { margin-right: auto; }

.reveal { opacity: 1; transform: none; }

@media (max-width: 900px) {
  .product-stage { min-height: auto; padding: 46px 34px; }
  .feature-row { grid-template-columns: repeat(2, 1fr); }
  .intro-grid, .principles { grid-template-columns: 1fr; gap: 56px; }
  .principles-heading { position: static; }
  .footer-main { grid-template-columns: 1fr 1fr; }
  .footer-main p { display: none; }
}

@media (max-width: 640px) {
  .site-header { top: 10px; width: calc(100% - 20px); min-height: 54px; padding-left: 15px; border-radius: 13px; }
  .brand { gap: 8px; font-size: 15px; }
  .brand-mark { width: 22px; height: 22px; }
  nav a { padding: 8px 7px; font-size: 11px; }
  .product-hero { padding: 112px 20px 84px; }
  .hero-copy { margin-bottom: 46px; }
  h1 { font-size: 64px; }
  .hero-tagline { margin-top: 18px; font-size: 26px; }
  .hero-description { font-size: 16px; }
  .hero-actions { flex-direction: column; align-items: stretch; max-width: 300px; margin: 24px auto 0; }
  .product-stage { min-height: auto; padding: 24px 12px; border-radius: 24px; }
  .feature-row { grid-template-columns: 1fr; gap: 36px; margin-top: 64px; padding: 0 10px; }
  .company-intro, .products, .principles { padding: 84px 24px; }
  .intro-grid h2, .section-heading h2, .principles-heading h2 { font-size: 42px; }
  .product-list { grid-template-columns: 1fr; }
  .product-card, .future-slot { min-height: 340px; padding: 30px; border-radius: 18px; }
  .product-name { font-size: 46px; }
  .principles-grid { grid-template-columns: 1fr; }
  .principles-grid article { min-height: 190px; }
  .principles-grid h3 { margin-top: 35px; }
  footer { padding: 64px 24px 28px; }
  .footer-main { grid-template-columns: 1fr; gap: 34px; min-height: 180px; }
  .contact-link { justify-self: start; }
  .footer-bottom { flex-wrap: wrap; gap: 16px 22px; }
  .footer-bottom span { flex-basis: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}