:root {
  color-scheme: dark;
  --ink: #eef7fa;
  --muted: #8ea1aa;
  --cyan: #5de6ff;
  --cyan-soft: #1ca7c9;
  --amber: #ffbd53;
  --panel: rgba(6, 18, 25, .82);
  --line: rgba(112, 221, 244, .19);
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: #03070a; }
body { margin: 0; min-width: 320px; color: var(--ink); background: #03070a; font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
a { color: inherit; }
.skip-link { position: fixed; z-index: 100; top: 8px; left: 8px; padding: 10px 14px; transform: translateY(-150%); background: #fff; color: #000; }
.skip-link:focus { transform: none; }

.topbar { position: fixed; z-index: 20; top: 0; left: 50%; width: min(calc(100% - 28px), var(--max)); height: 76px; display: flex; align-items: center; justify-content: space-between; transform: translateX(-50%); border-bottom: 1px solid var(--line); backdrop-filter: blur(16px); }
.brand { display: inline-flex; align-items: center; gap: 10px; color: #fff; text-decoration: none; font-weight: 950; font-size: 1.05rem; letter-spacing: .19em; }
.brand > span:last-child > span { color: var(--cyan); }
.brand-glyph { display: grid; place-items: center; width: 32px; height: 32px; color: #041014; background: var(--cyan); box-shadow: 0 0 26px rgba(93, 230, 255, .45); clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%); font-size: .7rem; }
.server-state { display: flex; align-items: center; gap: 8px; color: #9fbbc4; font: 800 .72rem/1 ui-monospace, monospace; letter-spacing: .12em; }
.server-state i { width: 7px; height: 7px; border-radius: 50%; background: #62e7a0; box-shadow: 0 0 11px #62e7a0; animation: pulse 1.8s ease-in-out infinite; }

.hero { position: relative; isolation: isolate; min-height: 100svh; overflow: hidden; display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(280px, .9fr); align-items: center; gap: 30px; padding: 120px max(24px, calc((100vw - var(--max)) / 2)) 72px; background: #040a0e; }
.hero::before { content: ""; position: absolute; z-index: -1; inset: 0; background: linear-gradient(90deg, rgba(2, 7, 10, .98) 0%, rgba(2, 8, 11, .82) 43%, rgba(2, 8, 11, .3) 72%, rgba(2, 7, 10, .76) 100%), radial-gradient(circle at 72% 45%, rgba(38, 191, 221, .18), transparent 42%); }
.hero-art { position: absolute; z-index: -3; inset: -4%; background: url("/media/ui/home-command-deck-v1.png") 76% 45% / cover no-repeat; filter: saturate(.9) contrast(1.08) brightness(.6); transform: scale(1.05); animation: drift 16s ease-in-out infinite alternate; }
.scanlines { position: absolute; z-index: -2; inset: 0; opacity: .18; pointer-events: none; background: repeating-linear-gradient(180deg, transparent 0 5px, rgba(117, 228, 255, .1) 6px); mask-image: linear-gradient(90deg, #000, transparent 80%); }
.hero-copy { max-width: 720px; }
.eyebrow { display: flex; align-items: center; gap: 11px; margin: 0 0 18px; color: var(--cyan); font: 850 .74rem/1.2 ui-monospace, monospace; letter-spacing: .17em; }
.eyebrow span { width: 38px; height: 1px; background: var(--cyan); box-shadow: 0 0 9px var(--cyan); }
h1, h2 { margin: 0; text-transform: uppercase; font-family: Impact, Haettenschweiler, "Arial Narrow Bold", sans-serif; font-weight: 900; letter-spacing: .025em; }
h1 { font-size: clamp(3.7rem, 8.2vw, 7.4rem); line-height: .86; text-shadow: 0 8px 32px #000; }
h1 em, h2 em { color: var(--cyan); font-style: normal; text-shadow: 0 0 35px rgba(93, 230, 255, .2); }
.lead { max-width: 650px; margin: 27px 0 0; color: #bdcbd0; font-size: clamp(1rem, 1.5vw, 1.18rem); line-height: 1.7; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; margin-top: 34px; }
.play, .learn { min-height: 52px; display: inline-flex; align-items: center; justify-content: center; gap: 24px; padding: 0 22px; border: 1px solid transparent; text-decoration: none; text-transform: uppercase; font-size: .82rem; font-weight: 900; letter-spacing: .08em; transition: transform .2s, box-shadow .2s, border-color .2s; }
.play { color: #061015; background: linear-gradient(135deg, #9af0ff, var(--cyan)); box-shadow: 0 0 0 1px rgba(159, 241, 255, .18), 0 13px 35px rgba(27, 178, 208, .23); clip-path: polygon(0 0, calc(100% - 13px) 0, 100% 13px, 100% 100%, 13px 100%, 0 calc(100% - 13px)); }
.play:hover, .play:focus-visible { transform: translateY(-2px); box-shadow: 0 0 30px rgba(93, 230, 255, .45); }
.learn { color: #d5e3e8; border-color: rgba(160, 217, 230, .27); background: rgba(4, 12, 17, .66); }
.learn:hover, .learn:focus-visible { border-color: var(--cyan); }
.play-small { min-height: 42px; padding: 0 17px; gap: 12px; }
.availability { display: flex; flex-wrap: wrap; gap: 21px; margin-top: 38px; padding-top: 22px; border-top: 1px solid var(--line); color: var(--muted); font-size: .76rem; }
.availability span { display: flex; flex-direction: column; gap: 4px; }
.availability b { color: #e6f7fb; font-size: .68rem; letter-spacing: .12em; }

.core-card { position: relative; min-height: 520px; display: grid; place-items: center; }
.core-card::after { content: ""; position: absolute; width: 53%; aspect-ratio: 1; border-radius: 50%; background: rgba(44, 206, 237, .16); filter: blur(45px); }
.core-card img { position: relative; z-index: 2; width: min(89%, 530px); height: auto; filter: drop-shadow(0 25px 36px #000) drop-shadow(0 0 23px rgba(93, 230, 255, .32)); animation: hover 4.8s ease-in-out infinite; }
.core-card > span { position: absolute; z-index: 3; right: 6%; bottom: 13%; padding: 7px 10px; border: 1px solid var(--line); color: var(--cyan); background: rgba(3, 11, 15, .83); font: 800 .65rem/1 ui-monospace, monospace; letter-spacing: .16em; }
.orbit { position: absolute; z-index: 1; width: 72%; aspect-ratio: 1; border: 1px solid rgba(93, 230, 255, .21); border-radius: 50%; }
.orbit::after { content: ""; position: absolute; top: 50%; left: -4px; width: 7px; height: 7px; border-radius: 50%; background: var(--amber); box-shadow: 0 0 13px var(--amber); }
.orbit-a { animation: spin 18s linear infinite; }
.orbit-b { width: 55%; border-style: dashed; animation: spin 12s linear infinite reverse; }
.scroll { position: absolute; left: 50%; bottom: 20px; display: flex; flex-direction: column; align-items: center; gap: 8px; transform: translateX(-50%); color: #849ba4; text-decoration: none; font: 700 .59rem/1 ui-monospace, monospace; letter-spacing: .17em; }
.scroll i { width: 1px; height: 25px; background: linear-gradient(var(--cyan), transparent); }

.systems { padding: 112px max(24px, calc((100vw - var(--max)) / 2)); background: radial-gradient(circle at 100% 0, rgba(38, 191, 221, .09), transparent 36%), #050a0e; }
.section-head { display: grid; grid-template-columns: 1.1fr 1fr; gap: 22px 70px; align-items: end; }
.section-head .eyebrow { grid-column: 1 / -1; margin-bottom: 0; }
h2 { font-size: clamp(2.7rem, 5vw, 5.2rem); line-height: .92; }
.section-head > p:last-child { margin: 0; max-width: 520px; color: var(--muted); font-size: 1rem; line-height: 1.7; }
.system-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 60px; }
.system-grid article { position: relative; min-height: 430px; overflow: hidden; display: flex; flex-direction: column; justify-content: flex-end; padding: 24px; border: 1px solid var(--line); background: linear-gradient(180deg, rgba(13, 30, 39, .45), rgba(4, 11, 15, .96)); transition: transform .25s, border-color .25s; }
.system-grid article:hover { transform: translateY(-5px); border-color: rgba(93, 230, 255, .55); }
.system-grid article::before { content: ""; position: absolute; inset: 0; opacity: .35; background: linear-gradient(145deg, transparent 45%, rgba(93, 230, 255, .12)); }
.system-grid img { position: absolute; top: 10px; left: 50%; width: min(75%, 270px); height: 260px; object-fit: contain; transform: translateX(-50%); filter: drop-shadow(0 18px 25px #000); }
.system-grid article > div { position: relative; z-index: 1; }
.number { position: absolute; z-index: 2; top: 18px; left: 18px; color: rgba(183, 233, 243, .47); font: 800 .68rem/1 ui-monospace, monospace; }
.system-grid small { color: var(--cyan); font: 800 .68rem/1 ui-monospace, monospace; letter-spacing: .15em; }
.system-grid h3 { margin: 9px 0 11px; font-size: 1.25rem; text-transform: uppercase; letter-spacing: .04em; }
.system-grid p { margin: 0; color: var(--muted); font-size: .92rem; line-height: 1.62; }

.cta { margin: 0 max(24px, calc((100vw - var(--max)) / 2)) 90px; padding: 48px; display: flex; align-items: center; justify-content: space-between; gap: 30px; border: 1px solid rgba(93, 230, 255, .27); background: linear-gradient(105deg, rgba(11, 36, 46, .92), rgba(4, 14, 19, .98)); box-shadow: inset 0 1px rgba(255, 255, 255, .05); }
.cta .eyebrow { margin-bottom: 10px; }
.cta h2 { font-size: clamp(2.3rem, 4vw, 4.3rem); }
.cta p:last-child { margin: 8px 0 0; color: var(--muted); }
footer { min-height: 100px; display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 22px max(24px, calc((100vw - var(--max)) / 2)); border-top: 1px solid var(--line); color: #71868f; font-size: .78rem; }
footer > a:last-child { color: #c8eaf1; text-transform: uppercase; font-weight: 800; letter-spacing: .08em; }

@keyframes pulse { 50% { opacity: .45; transform: scale(.8); } }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes hover { 50% { transform: translateY(-10px); } }
@keyframes drift { to { transform: scale(1.09) translate3d(-1%, 1%, 0); } }

@media (max-width: 850px) {
  .topbar { height: 66px; }
  .server-state { display: none; }
  .hero { min-height: 900px; grid-template-columns: 1fr; align-content: center; padding-top: 100px; text-align: center; }
  .hero::before { background: linear-gradient(180deg, rgba(2, 7, 10, .96), rgba(2, 8, 11, .74) 50%, rgba(2, 7, 10, .94)); }
  .hero-art { background-position: center 47%; }
  .hero-copy { z-index: 4; }
  .hero .eyebrow, .hero-actions, .availability { justify-content: center; }
  .lead { margin-left: auto; margin-right: auto; }
  .core-card { position: absolute; inset: 36% 0 auto; min-height: 430px; opacity: .64; }
  .core-card img { width: min(72vw, 450px); }
  .core-card > span { display: none; }
  .availability { margin-top: 330px; }
  .section-head { grid-template-columns: 1fr; }
  .system-grid { grid-template-columns: 1fr; }
  .system-grid article { min-height: 350px; }
  .system-grid img { left: auto; right: -12px; width: 210px; height: 210px; transform: none; opacity: .72; }
  .system-grid article > div { max-width: 62%; }
  .cta { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 520px) {
  .topbar { width: calc(100% - 22px); }
  .brand { font-size: .85rem; letter-spacing: .13em; }
  .brand-glyph { width: 28px; height: 28px; }
  .play-small { min-height: 38px; padding: 0 12px; font-size: .67rem; }
  .hero { min-height: 840px; padding-left: 18px; padding-right: 18px; }
  h1 { font-size: clamp(3.05rem, 16vw, 4.75rem); }
  .lead { font-size: .98rem; line-height: 1.58; }
  .hero-actions { flex-direction: column; }
  .hero-actions a { width: min(100%, 320px); }
  .availability { gap: 14px; margin-top: 300px; }
  .availability span { width: calc(50% - 8px); }
  .systems { padding: 82px 18px; }
  .system-grid article { min-height: 390px; }
  .system-grid img { top: 24px; right: 50%; width: 220px; height: 220px; transform: translateX(50%); }
  .system-grid article > div { max-width: none; }
  .cta { margin: 0 18px 60px; padding: 28px 22px; }
  .cta .play { width: 100%; }
  footer { flex-direction: column; padding-top: 32px; padding-bottom: 32px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}