:root {
  --bg: #000;
  --s1: #070809;
  --s2: #0c0d0f;
  --line: rgba(255, 255, 255, .08);
  --line-2: rgba(255, 255, 255, .14);
  --text: #f4f5f6;
  --mute: #8a8f98;
  --dim: #5b6068;
  --sky: #7dd3fc;
  --sky-2: #38bdf8;
  --sky-soft: rgba(125, 211, 252, .12);
  --sans: "Geist", ui-sans-serif, system-ui, sans-serif;
  --serif: "Instrument Serif", Georgia, serif;
  --mono: "Geist Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
html, body { overflow-x: clip; }
body {
  background: var(--bg); color: var(--text); font-family: var(--sans);
  font-size: 15px; line-height: 1.6; -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button, input { font: inherit; color: inherit; background: none; border: 0; }
button { cursor: pointer; }
::selection { background: var(--sky); color: #000; }

.wrap { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.mute { color: var(--mute); }
.mono { font-family: var(--mono); }
.small { font-size: 13px; }
em { font-family: var(--serif); font-style: italic; font-weight: 400; color: var(--sky); letter-spacing: -0.01em; }

/* nav */
.nav { position: sticky; top: 0; z-index: 40; background: rgba(0,0,0,.72); backdrop-filter: blur(16px); border-bottom: 1px solid var(--line); }
.nav-in { height: 60px; display: flex; align-items: center; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 500; font-size: 16px; letter-spacing: -0.02em; }
.mark { width: 24px; height: 24px; color: #fff; }
.links { display: flex; gap: 32px; font-size: 14px; color: var(--mute); }
.links a { transition: color .2s; }
.links a:hover { color: var(--text); }
.nav-r { display: flex; align-items: center; gap: 8px; }
.ghost { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 8px; color: var(--mute); transition: color .2s, background .2s; }
.ghost:hover { color: var(--text); background: rgba(255,255,255,.05); }

/* buttons */
.btn { display: inline-flex; align-items: center; gap: 8px; height: 44px; padding: 0 20px; border-radius: 999px; font-size: 14px; font-weight: 500; transition: background .2s, box-shadow .3s, transform .2s, border-color .2s; }
.btn:active { transform: scale(.98); }
.btn-sm { height: 34px; padding: 0 14px; font-size: 13px; }
.btn-light { background: var(--text); color: #000; }
.btn-light:hover { background: #fff; }
.btn-sky { background: var(--sky); color: #001018; box-shadow: 0 0 0 1px rgba(125,211,252,.4), 0 8px 32px -8px rgba(56,189,248,.6); }
.btn-sky:hover { background: #a5e1fd; box-shadow: 0 0 0 1px rgba(125,211,252,.6), 0 10px 44px -6px rgba(56,189,248,.75); }
.btn-sky svg { transition: transform .2s; }
.btn-sky:hover svg { transform: translateX(3px); }
.btn-line { border: 1px solid var(--line-2); }
.btn-line:hover { border-color: rgba(255,255,255,.3); background: rgba(255,255,255,.03); }

/* hero */
.hero { position: relative; padding: 120px 0 0; text-align: center; overflow: hidden; }
.hero-in { position: relative; z-index: 2; }
.kicker { display: inline-flex; align-items: center; gap: 10px; font-family: var(--mono); font-size: 12px; color: var(--mute); letter-spacing: .02em; padding: 6px 14px; border: 1px solid var(--line); border-radius: 999px; }
.kicker .sep { color: var(--dim); }
.dot { width: 6px; height: 6px; border-radius: 50%; background: var(--sky); box-shadow: 0 0 12px var(--sky); }
h1 { margin-top: 32px; font-weight: 500; font-size: clamp(48px, 9vw, 112px); line-height: .98; letter-spacing: -0.055em; }
h1 em { font-size: 1.08em; letter-spacing: -0.03em; }
.lede { max-width: 520px; margin: 28px auto 0; color: var(--mute); font-size: 17px; line-height: 1.65; }
.hero-cta { margin-top: 40px; display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.cmd { display: inline-flex; align-items: center; gap: 10px; height: 44px; padding: 0 18px; border-radius: 999px; border: 1px solid var(--line-2); font-family: var(--mono); font-size: 13px; color: #d6d9de; transition: border-color .2s; }
.cmd:hover { border-color: rgba(125,211,252,.5); }
.cmd-p { color: var(--sky); }
.cmd-i { color: var(--dim); }

/* signature horizon */
.horizon { position: relative; height: 300px; margin-top: 40px; -webkit-mask-image: linear-gradient(#000 55%, transparent); mask-image: linear-gradient(#000 55%, transparent); }
.arc { position: absolute; left: 50%; top: 120px; width: 1500px; height: 1500px; transform: translateX(-50%); border-radius: 50%; background: #000; border-top: 1px solid rgba(186,230,253,.9); box-shadow: 0 -1px 40px rgba(125,211,252,.55), inset 0 30px 60px -30px rgba(125,211,252,.25); }
.arc-glow { position: absolute; left: 50%; top: 40px; width: 900px; height: 260px; transform: translateX(-50%); background: radial-gradient(50% 60% at 50% 70%, rgba(56,189,248,.35), transparent 70%); filter: blur(20px); animation: breathe 6s ease-in-out infinite; }
@keyframes breathe { 50% { opacity: .6; } }

/* stack strip */
.strip { display: flex; align-items: center; gap: 32px; padding-top: 0; padding-bottom: 40px; color: var(--dim); font-size: 13px; position: relative; z-index: 2; margin-top: -96px; justify-content: center; flex-wrap: wrap; }
.strip ul { display: flex; gap: 32px; list-style: none; flex-wrap: wrap; justify-content: center; }
.strip li { color: var(--mute); font-weight: 500; letter-spacing: -0.01em; }

/* sections */
.sec { padding: 120px 24px 0; }
.sec-head { display: grid; grid-template-columns: 80px 1fr; gap: 24px; margin-bottom: 48px; align-items: start; }
.idx { font-family: var(--mono); font-size: 12px; color: var(--sky); padding-top: 14px; border-top: 1px solid var(--sky); width: 32px; }
h2 { font-size: clamp(32px, 4.6vw, 52px); font-weight: 500; letter-spacing: -0.045em; line-height: 1.05; }
.sec-head p { margin-top: 14px; max-width: 520px; }

/* component grid — hairline blueprint */
.grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.cell { position: relative; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); display: flex; flex-direction: column; transition: background .3s; }
.cell::before, .cell::after { content: ""; position: absolute; width: 9px; height: 9px; pointer-events: none; opacity: 0; transition: opacity .3s; }
.cell::before { top: -1px; left: -1px; border-top: 1px solid var(--sky); border-left: 1px solid var(--sky); }
.cell::after { bottom: -1px; right: -1px; border-bottom: 1px solid var(--sky); border-right: 1px solid var(--sky); }
.cell:hover { background: var(--s1); }
.cell:hover::before, .cell:hover::after { opacity: 1; }
.span2 { grid-column: span 2; }
.stage { flex: 1; min-height: 240px; display: flex; align-items: center; justify-content: center; gap: 10px; padding: 32px; }
.stage.col { flex-direction: column; gap: 20px; }
.cap { display: flex; justify-content: space-between; padding: 14px 18px; font-size: 13px; color: var(--mute); border-top: 1px solid var(--line); }
.cap .mono { color: var(--dim); font-size: 12px; }

/* demo: buttons */
.b-sky { height: 38px; padding: 0 16px; border-radius: 8px; font-size: 13px; font-weight: 500; background: var(--sky); color: #001018; transition: box-shadow .3s, background .2s; }
.b-sky:hover { background: #a5e1fd; box-shadow: 0 6px 28px -6px rgba(56,189,248,.7); }
.b-line { height: 38px; padding: 0 16px; border-radius: 8px; font-size: 13px; font-weight: 500; border: 1px solid var(--line-2); transition: background .2s; }
.b-line:hover { background: rgba(255,255,255,.05); }

/* demo: stat */
.stat { width: 220px; padding: 18px; border: 1px solid var(--line); border-radius: 12px; background: var(--s2); display: flex; flex-direction: column; }
.stat-l { font-size: 12px; color: var(--mute); }
.stat-v { font-size: 30px; font-weight: 500; letter-spacing: -0.04em; font-variant-numeric: tabular-nums; margin: 2px 0 10px; }
.spark { width: 100%; height: 32px; }
.spark path { stroke-dasharray: 200; stroke-dashoffset: 200; animation: draw 2.4s ease forwards .4s; }
@keyframes draw { to { stroke-dashoffset: 0; } }

/* demo: switch */
.opts { width: 100%; max-width: 230px; display: flex; flex-direction: column; }
.opts label { display: flex; justify-content: space-between; align-items: center; padding: 11px 0; font-size: 14px; border-bottom: 1px solid var(--line); cursor: pointer; }
.opts label:last-child { border-bottom: 0; }
.sw { appearance: none; width: 34px; height: 20px; border-radius: 999px; background: #1c1e22; position: relative; cursor: pointer; transition: background .25s; box-shadow: inset 0 0 0 1px var(--line-2); }
.sw::after { content: ""; position: absolute; top: 3px; left: 3px; width: 14px; height: 14px; border-radius: 50%; background: #9aa0a8; transition: transform .3s cubic-bezier(.2,1.4,.4,1), background .25s; }
.sw:checked { background: var(--sky); box-shadow: none; }
.sw:checked::after { transform: translateX(14px); background: #001018; }

/* demo: palette */
.palette { width: 100%; max-width: 420px; border: 1px solid var(--line-2); border-radius: 14px; background: var(--s2); overflow: hidden; box-shadow: 0 30px 80px -30px rgba(56,189,248,.25); }
.pal-in { display: flex; align-items: center; gap: 10px; padding: 12px 14px; border-bottom: 1px solid var(--line); color: var(--dim); }
.pal-in input { flex: 1; outline: 0; font-size: 14px; color: var(--text); min-width: 0; }
.pal-in input::placeholder { color: var(--dim); }
kbd { font-family: var(--mono); font-size: 11px; padding: 2px 6px; border: 1px solid var(--line-2); border-radius: 5px; color: var(--mute); }
.palette ul { list-style: none; padding: 6px; }
.palette li { display: flex; justify-content: space-between; padding: 9px 10px; border-radius: 8px; font-size: 13px; color: var(--mute); cursor: pointer; transition: background .15s, color .15s; }
.palette li em { font-family: var(--mono); font-style: normal; font-size: 11px; color: var(--dim); }
.palette li.on { background: var(--sky-soft); color: var(--text); }
.palette li.on em { color: var(--sky); }
.palette li.hide { display: none; }

/* demo: segmented */
.seg { position: relative; display: inline-flex; padding: 3px; border: 1px solid var(--line-2); border-radius: 999px; }
.seg button { position: relative; z-index: 1; padding: 7px 18px; font-size: 13px; color: var(--mute); transition: color .25s; }
.seg button.on { color: #001018; font-weight: 500; }
.seg-ind { position: absolute; top: 3px; bottom: 3px; left: 3px; border-radius: 999px; background: var(--sky); transition: transform .4s cubic-bezier(.2,1.2,.4,1), width .4s cubic-bezier(.2,1.2,.4,1); }

/* demo: input */
.field { position: relative; width: 100%; max-width: 240px; }
.field input { width: 100%; height: 50px; padding: 18px 14px 4px; border: 1px solid var(--line-2); border-radius: 10px; outline: 0; background: var(--s2); transition: border-color .2s, box-shadow .2s; }
.field input:focus { border-color: var(--sky); box-shadow: 0 0 0 4px var(--sky-soft); }
.field label { position: absolute; left: 14px; top: 14px; font-size: 14px; color: var(--dim); pointer-events: none; transition: all .18s; }
.field input:focus + label, .field input:not(:placeholder-shown) + label { top: 6px; font-size: 11px; color: var(--sky); }

/* demo: avatars */
.avs { display: flex; }
.avs i { width: 38px; height: 38px; margin-left: -8px; border-radius: 50%; display: grid; place-items: center; font-style: normal; font-size: 11px; font-weight: 500; background: #15171a; border: 2px solid #000; color: var(--mute); transition: transform .2s; }
.avs i:first-child { margin-left: 0; background: var(--sky); color: #001018; }
.avs i:hover { transform: translateY(-4px); }
.avs .more { color: var(--sky); }
.chips { display: flex; gap: 6px; }
.chips span { font-size: 12px; padding: 3px 10px; border-radius: 999px; border: 1px solid var(--line-2); color: var(--mute); }
.chips .c-sky { border-color: rgba(125,211,252,.35); color: var(--sky); background: var(--sky-soft); }

/* demo: slider */
.range { width: 100%; max-width: 230px; }
.range-top { display: flex; justify-content: space-between; font-size: 13px; color: var(--mute); margin-bottom: 14px; }
.range-top .mono { color: var(--text); }
input[type=range] { -webkit-appearance: none; appearance: none; width: 100%; height: 4px; border-radius: 4px; background: linear-gradient(90deg, var(--sky) var(--p, 64%), #1c1e22 var(--p, 64%)); outline: 0; }
input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; width: 16px; height: 16px; border-radius: 50%; background: #fff; box-shadow: 0 0 0 4px rgba(125,211,252,.25); cursor: grab; }
input[type=range]::-moz-range-thumb { width: 16px; height: 16px; border: 0; border-radius: 50%; background: #fff; box-shadow: 0 0 0 4px rgba(125,211,252,.25); cursor: grab; }

/* library index */
.index { display: grid; grid-template-columns: 1fr 1fr; column-gap: 48px; border-top: 1px solid var(--line); }
.index a { display: grid; grid-template-columns: 40px 1fr auto 24px; align-items: center; padding: 20px 4px; border-bottom: 1px solid var(--line); transition: padding .3s, color .3s; }
.index .n { font-family: var(--mono); font-size: 12px; color: var(--dim); }
.index .t { font-size: 20px; letter-spacing: -0.03em; }
.index .c { font-family: var(--mono); font-size: 12px; color: var(--dim); }
.index .ar { text-align: right; color: var(--sky); opacity: 0; transform: translateX(-6px); transition: all .3s; }
.index a:hover { padding-left: 12px; }
.index a:hover .t { color: var(--sky); }
.index a:hover .ar { opacity: 1; transform: none; }

/* templates */
.tpls { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.tpl { display: block; }
.shot { aspect-ratio: 4/3; border: 1px solid var(--line); border-radius: 14px; background: var(--s1); padding: 14px; display: flex; flex-direction: column; gap: 12px; overflow: hidden; transition: border-color .3s, transform .4s cubic-bezier(.2,.8,.2,1); }
.tpl:hover .shot { border-color: rgba(125,211,252,.4); transform: translateY(-4px); }
.tpl-m { display: flex; justify-content: space-between; padding: 14px 2px 0; font-size: 14px; }
.sh-bar { display: flex; gap: 5px; }
.sh-bar i { width: 7px; height: 7px; border-radius: 50%; background: #1f2226; }
.shot b, .shot p, .shot aside, .shot > div span { display: block; border-radius: 4px; background: #16181b; }
.sh-hero { position: relative; flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px; overflow: hidden; }
.sh-hero b { width: 70%; height: 10px; background: #2a2d32; }
.sh-hero b.s { width: 45%; }
.sh-hero span { width: 26%; height: 14px; margin-top: 4px; background: var(--sky) !important; border-radius: 99px !important; }
.sh-arc { position: absolute; left: 50%; top: 78%; width: 160%; aspect-ratio: 1; transform: translateX(-50%); border-radius: 50%; border-top: 1px solid var(--sky); box-shadow: 0 -4px 24px rgba(56,189,248,.45); }
.sh-dash { flex: 1; display: flex; gap: 8px; }
.sh-dash aside { width: 22%; }
.sh-dash > div { flex: 1; display: grid; grid-template-columns: repeat(3, 1fr); grid-template-rows: 28px 1fr; gap: 6px; }
.sh-dash span { grid-column: 1 / -1; padding: 8px; }
.sh-dash svg { width: 100%; height: 100%; }
.sh-chat { flex: 1; display: flex; flex-direction: column; gap: 8px; }
.sh-chat p { height: 16px; width: 62%; }
.sh-chat p.me { align-self: flex-end; width: 46%; background: var(--sky-soft); border: 1px solid rgba(125,211,252,.3); }
.sh-chat span { margin-top: auto; height: 22px; border: 1px solid var(--line-2); background: transparent !important; border-radius: 99px !important; }

/* terminal */
.term { border: 1px solid var(--line-2); border-radius: 14px; background: var(--s1); overflow: hidden; max-width: 760px; }
.term-bar { display: flex; align-items: center; gap: 6px; padding: 12px 16px; border-bottom: 1px solid var(--line); }
.term-bar i { width: 9px; height: 9px; border-radius: 50%; background: #1f2226; }
.term-bar span { margin-left: auto; font-family: var(--mono); font-size: 11px; color: var(--dim); }
.term pre { padding: 22px 20px; font-family: var(--mono); font-size: 13.5px; line-height: 1.9; overflow-x: auto; color: #d6d9de; }
.term .p { color: var(--sky); margin-right: 6px; }
.term .ok { color: var(--sky); }
.term .sky { color: var(--sky); }
.caret { display: inline-block; width: 8px; height: 15px; margin-left: 6px; vertical-align: -2px; background: var(--sky); animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

.facts { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 64px; border-top: 1px solid var(--line); }
.facts div { padding: 28px 24px 0 0; display: flex; flex-direction: column; gap: 6px; }
.facts b { font-weight: 500; font-size: 32px; letter-spacing: -0.04em; }
.facts span { font-size: 13px; color: var(--mute); }

/* final */
.final { padding: 160px 24px 140px; text-align: center; position: relative; }
.final::before { content: ""; position: absolute; left: 50%; top: 40%; width: 600px; height: 300px; transform: translate(-50%, -50%); background: radial-gradient(closest-side, rgba(56,189,248,.18), transparent); pointer-events: none; }
.final h2 { position: relative; font-size: clamp(44px, 7vw, 88px); letter-spacing: -0.055em; }
.final .hero-cta { position: relative; }

/* footer */
.foot { border-top: 1px solid var(--line); padding: 28px 0; }
.foot-in { display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.foot nav { display: flex; gap: 24px; font-size: 13px; color: var(--mute); flex-wrap: wrap; }
.foot nav a:hover { color: var(--text); }

/* toast */
.toast { position: fixed; bottom: 28px; left: 50%; transform: translate(-50%, 12px); opacity: 0; padding: 8px 16px; border-radius: 999px; background: var(--sky); color: #001018; font-size: 13px; font-weight: 500; transition: all .25s; pointer-events: none; z-index: 60; }
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* reveal */
.rv { opacity: 0; transform: translateY(14px); transition: opacity .8s cubic-bezier(.2,.8,.2,1), transform .8s cubic-bezier(.2,.8,.2,1); }
.rv.in { opacity: 1; transform: none; }

@media (max-width: 900px) {
  .links { display: none; }
  .grid { grid-template-columns: 1fr 1fr; }
  .tpls { grid-template-columns: 1fr 1fr; }
  .facts { grid-template-columns: 1fr 1fr; row-gap: 24px; }
}
@media (max-width: 640px) {
  .hero { padding-top: 80px; }
  .horizon { height: 220px; }
  .arc { top: 100px; width: 900px; height: 900px; }
  .arc-glow { width: 500px; }
  .strip { margin-top: -100px; gap: 16px; }
  .strip ul { gap: 18px; }
  .grid { grid-template-columns: 1fr; }
  .span2 { grid-column: auto; }
  .sec { padding-top: 96px; }
  .sec-head { grid-template-columns: 1fr; gap: 16px; }
  .index { grid-template-columns: 1fr; }
  .tpls { grid-template-columns: 1fr; }
  .final { padding: 120px 24px 100px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .rv { opacity: 1; transform: none; }
  .spark path { stroke-dashoffset: 0; }
}