:root {
  --bg: #06111a;
  --bg-deep: #03080d;
  --panel: #0b1b27;
  --panel-2: #102533;
  --line: rgba(129, 201, 238, .18);
  --text: #f4f8fb;
  --muted: #a7bac7;
  --blue: #25a9f7;
  --blue-2: #6bc9ff;
  --cyan: #46e0da;
  --max: 1180px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 72% 8%, rgba(37,169,247,.13), transparent 30rem),
    linear-gradient(180deg, #07131d 0%, #06111a 55%, #040b11 100%);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, select { font: inherit; }
.shell { width: min(calc(100% - 2rem), var(--max)); margin-inline: auto; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  min-height: 68px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 2rem;
  padding: .7rem max(1rem, calc((100vw - var(--max)) / 2));
  border-bottom: 1px solid rgba(255,255,255,.07);
  background: rgba(6,17,26,.86);
  backdrop-filter: blur(18px);
}
.brand { display: inline-flex; align-items: baseline; font-size: 1.45rem; font-weight: 800; letter-spacing: -.045em; }
.brand-arranger { color: #fff; }
.brand-x { color: var(--blue); font-size: 1.2em; margin-left: .03em; }
.site-header nav { display: flex; justify-content: center; gap: clamp(1rem, 2vw, 2rem); color: var(--muted); font-size: .92rem; }
.site-header nav a:hover { color: #fff; }
.button {
  appearance: none;
  border: 0;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: .8rem 1.4rem;
  color: #00121e;
  background: linear-gradient(135deg, var(--cyan), var(--blue-2));
  box-shadow: 0 10px 30px rgba(37,169,247,.18);
  font-weight: 800;
  cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease;
}
.button:hover { transform: translateY(-2px); box-shadow: 0 14px 35px rgba(37,169,247,.28); }
.button-small { min-height: 40px; padding: .55rem 1rem; font-size: .86rem; }
.text-link { color: var(--blue-2); font-weight: 700; }
.eyebrow {
  margin: 0 0 1rem;
  color: var(--cyan);
  text-transform: uppercase;
  letter-spacing: .16em;
  font-size: .76rem;
  font-weight: 800;
}
.hero {
  min-height: calc(100svh - 68px);
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: clamp(2rem, 5vw, 5.5rem);
  align-items: center;
  padding-block: clamp(4rem, 8vw, 7rem);
}
.hero h1 {
  margin: 0;
  max-width: 14ch;
  font-size: clamp(3rem, 5.2vw, 4.9rem);
  line-height: 1.01;
  letter-spacing: -.065em;
}
.hero h1 span { color: var(--blue-2); }
.hero-lead {
  max-width: 39rem;
  margin: 1.8rem 0 0;
  color: #c4d2dc;
  font-size: clamp(1.05rem, 1.6vw, 1.28rem);
}
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1.2rem; margin-top: 2rem; }
.price-note {
  margin-top: 2.2rem;
  display: flex;
  flex-direction: column;
  gap: .2rem;
  color: var(--muted);
  font-size: .9rem;
}
.price-note strong { color: #fff; font-size: 1rem; }
.product-visual { position: relative; isolation: isolate; }
.screen-glow {
  position: absolute;
  inset: 12% 4% 2%;
  z-index: -1;
  border-radius: 50%;
  background: rgba(37,169,247,.26);
  filter: blur(70px);
}
.screen-frame {
  overflow: hidden;
  border: 1px solid rgba(120,205,255,.26);
  border-radius: 22px;
  background: #07131d;
  box-shadow: 0 40px 80px rgba(0,0,0,.5), 0 0 0 1px rgba(255,255,255,.03) inset;
  transform: perspective(1100px) rotateY(-4deg) rotateX(1deg);
}
.screen-bar {
  min-height: 38px;
  display: flex;
  align-items: center;
  gap: .42rem;
  padding: 0 .8rem;
  color: #87a0b0;
  border-bottom: 1px solid rgba(255,255,255,.06);
  font-size: .72rem;
}
.screen-bar span:last-child { margin-left: .4rem; }
.screen-dot { width: 7px; height: 7px; border-radius: 50%; background: #24475c; }
.screen-frame img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; object-position: top; }
.manifesto {
  border-block: 1px solid rgba(255,255,255,.07);
  background: linear-gradient(90deg, rgba(37,169,247,.06), rgba(70,224,218,.03));
}
.manifesto-inner { padding-block: clamp(3.5rem, 7vw, 6rem); text-align: center; }
.manifesto-kicker { margin: 0 0 .7rem; color: var(--muted); font-size: .9rem; }
.manifesto h2 {
  margin: 0;
  font-size: clamp(2.8rem, 7vw, 6.2rem);
  letter-spacing: -.065em;
  line-height: 1;
}
.manifesto h2 span { color: var(--blue); }
.manifesto p:last-child { max-width: 760px; margin: 1.6rem auto 0; color: #b6c8d3; font-size: 1.08rem; }
.section { padding-block: clamp(4.5rem, 8vw, 7.5rem); }
.section-heading { max-width: 700px; margin-bottom: 2.5rem; }
.section-heading h2, .library-grid h2, .register-copy h2 {
  margin: 0;
  font-size: clamp(2.35rem, 5vw, 4.4rem);
  line-height: 1.02;
  letter-spacing: -.055em;
}
.section-heading > p:last-child { color: var(--muted); font-size: 1.08rem; }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.feature-card {
  position: relative;
  min-height: 350px;
  padding: 1.5rem;
  overflow: hidden;
  isolation: isolate;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: linear-gradient(145deg, rgba(16,37,51,.94), rgba(7,22,32,.94));
}
.feature-card::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: radial-gradient(circle at 80% 18%, rgba(37,169,247,.13), transparent 48%);
}
.feature-art {
  position: absolute;
  top: 18px;
  right: -20px;
  z-index: 0;
  width: 205px;
  height: 124px;
  object-fit: contain;
  opacity: .62;
  pointer-events: none;
}
.feature-card h3 { position: relative; z-index: 2; margin: 8.2rem 0 .7rem; font-size: 1.22rem; }
.feature-card p { position: relative; z-index: 2; margin: 0; color: var(--muted); font-size: .95rem; }
.section-library {
  border-block: 1px solid rgba(255,255,255,.06);
  background:
    radial-gradient(circle at 8% 25%, rgba(70,224,218,.08), transparent 22rem),
    #081722;
}
.library-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(2rem, 6vw, 6rem); align-items: center; }
.library-grid h2 { max-width: 14ch; }
.large-copy { color: #c7d5de; font-size: 1.14rem; }
.library-grid > div:first-child > p:last-child { color: var(--muted); }
.library-panel {
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(4,14,22,.68);
  box-shadow: 0 30px 60px rgba(0,0,0,.25);
}
.library-item { padding: 1.25rem; border-radius: 16px; }
.library-item + .library-item { border-top: 1px solid rgba(255,255,255,.07); border-radius: 0; }
.library-item strong { display: block; color: var(--blue-2); margin-bottom: .35rem; font-size: 1.08rem; }
.library-item span { color: var(--muted); }
.requirements-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.requirement-card {
  position: relative;
  padding: clamp(1.5rem, 3vw, 2.5rem);
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(10,27,39,.72);
}
.requirement-card.recommended {
  border-color: rgba(70,224,218,.42);
  box-shadow: 0 0 0 1px rgba(70,224,218,.08) inset;
}
.requirement-label { margin: 0 0 .6rem; color: var(--cyan); text-transform: uppercase; letter-spacing: .14em; font-size: .72rem; font-weight: 800; }
.requirement-card h3 { margin: 0; font-size: 1.55rem; }
.requirement-card ul { margin: 1.2rem 0 0; padding-left: 1.2rem; color: var(--muted); }
.requirement-card li + li { margin-top: .55rem; }
.linux-note {
  margin: 1rem 0 0;
  padding: 1rem 1.2rem;
  border-left: 3px solid var(--blue);
  color: var(--muted);
  background: rgba(37,169,247,.06);
}
.linux-note strong { color: #fff; }
.register-section {
  padding-block: clamp(4.5rem, 8vw, 8rem);
  background:
    radial-gradient(circle at 80% 40%, rgba(37,169,247,.16), transparent 26rem),
    linear-gradient(180deg, #07131d, #041019);
}
.register-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: clamp(2rem, 6vw, 6rem); align-items: start; }
.register-copy p:not(.eyebrow) { max-width: 36rem; color: #b8cad5; font-size: 1.06rem; }
.microcopy { color: #7f99aa !important; font-size: .9rem !important; }
.interest-form {
  display: grid;
  gap: 1rem;
  padding: clamp(1.3rem, 3vw, 2rem);
  border: 1px solid rgba(105,201,255,.22);
  border-radius: 24px;
  background: rgba(8,25,36,.9);
  box-shadow: 0 28px 70px rgba(0,0,0,.28);
}
.interest-form label > span:first-child { display: block; margin-bottom: .45rem; color: #dfeaf0; font-size: .9rem; font-weight: 700; }
.interest-form em { color: #728b9b; font-style: normal; font-weight: 500; }
input, select {
  width: 100%;
  min-height: 50px;
  padding: .7rem .9rem;
  border: 1px solid rgba(151,203,231,.2);
  border-radius: 12px;
  outline: none;
  color: #fff;
  background: #07151f;
}
input:focus, select:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(37,169,247,.12); }
select option { color: #fff; background: #07151f; }
.consent { display: grid !important; grid-template-columns: auto 1fr; align-items: start; gap: .7rem; color: var(--muted); font-size: .83rem; }
.consent input { width: 19px; height: 19px; min-height: 0; margin-top: .15rem; accent-color: var(--blue); }
.consent span { margin: 0 !important; color: var(--muted) !important; font-weight: 500 !important; }
.hp-field { position: absolute !important; left: -9999px !important; width: 1px !important; height: 1px !important; overflow: hidden !important; }
.form-button { width: 100%; margin-top: .2rem; }
.form-status { min-height: 1.4em; margin: 0; text-align: center; color: var(--muted); font-size: .86rem; }
.form-status.success { color: #6de1bb; }
.form-status.error { color: #ff9f9f; }
.privacy { padding-block: 1.5rem 3rem; }
.privacy details { max-width: 760px; color: var(--muted); font-size: .85rem; }
.privacy summary { color: #c8d6de; cursor: pointer; }
footer { border-top: 1px solid rgba(255,255,255,.07); background: #03090e; }
.footer-inner {
  min-height: 100px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  color: #768c9a;
  font-size: .82rem;
}
footer .brand { font-size: 1.2rem; }
footer a:last-child { color: #a8bdc9; }

@media (max-width: 900px) {
  .site-header { grid-template-columns: 1fr auto; gap: 1rem; }
  .site-header nav { display: none; }
  .hero { min-height: auto; grid-template-columns: 1fr; padding-top: 3.5rem; }
  .hero-copy { text-align: center; }
  .hero h1 { max-width: 12ch; margin-inline: auto; font-size: clamp(3.1rem, 12vw, 5.4rem); }
  .hero-lead { margin-inline: auto; }
  .hero-actions { justify-content: center; }
  .price-note { align-items: center; }
  .product-visual { width: min(100%, 760px); margin-inline: auto; }
  .screen-frame { transform: none; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .library-grid, .register-grid { grid-template-columns: 1fr; }
}
@media (max-width: 620px) {
  .shell { width: min(calc(100% - 1.25rem), var(--max)); }
  .site-header { min-height: 60px; padding-inline: .8rem; }
  .brand { font-size: 1.22rem; }
  .button-small { min-height: 38px; padding-inline: .85rem; font-size: .78rem; }
  .hero { padding-block: 2.8rem 3.8rem; gap: 2.4rem; }
  .eyebrow { font-size: .65rem; letter-spacing: .12em; }
  .hero h1 { font-size: clamp(2.65rem, 13.3vw, 4.4rem); }
  .hero-lead { font-size: 1rem; line-height: 1.58; }
  .hero-actions { flex-direction: column; align-items: stretch; gap: .9rem; }
  .hero-actions .button { width: 100%; }
  .hero-actions .text-link { text-align: center; }
  .screen-frame { border-radius: 14px; }
  .screen-bar { min-height: 32px; font-size: .64rem; }
  .manifesto h2 { font-size: clamp(2.4rem, 14vw, 4.5rem); }
  .manifesto p:last-child { font-size: .98rem; }
  .section { padding-block: 4rem; }
  .section-heading h2, .library-grid h2, .register-copy h2 { font-size: clamp(2.2rem, 11vw, 3.6rem); }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card { min-height: 320px; }
  .feature-art { width: 230px; height: 138px; right: -10px; opacity: .58; }
  .feature-card h3 { margin-top: 9rem; }
  .requirements-grid { grid-template-columns: 1fr; }
  .interest-form { border-radius: 18px; }
  .footer-inner { flex-direction: column; justify-content: center; padding-block: 1.5rem; text-align: center; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button { transition: none; }
}