/* calsync. Black, white and grey only: a dark page, one white horizon, the real setup page as the hero.
   No accent colours. Copies are drawn hatched, your own events solid. Motion is CSS only and stops for reduced motion. */

@font-face { font-family: Inter; src: url(/fonts/inter-400.woff2) format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: Inter; src: url(/fonts/inter-600.woff2) format("woff2"); font-weight: 600; font-display: swap; }
@font-face { font-family: Mono; src: url(/fonts/jetbrains-mono-400.woff2) format("woff2"); font-weight: 400; font-display: swap; }

:root {
  --bg: #050505;
  --panel: #0c0c0c;
  --line: rgba(255, 255, 255, .08);
  --line2: rgba(255, 255, 255, .15);
  --text: #f5f5f5;
  --dim: #8d8d8d;
  --faint: #5c5c5c;
  --sans: Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: Mono, ui-monospace, "SFMono-Regular", Menlo, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { background: var(--bg); color: var(--text); font: 400 16px/1.55 var(--sans); -webkit-font-smoothing: antialiased; overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
code, pre { font-family: var(--mono); }
:focus-visible { outline: 2px solid var(--text); outline-offset: 3px; border-radius: 6px; }
.wrap { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--text); color: var(--bg); padding: 8px 12px; border-radius: 8px; z-index: 50; }
.skip:focus { left: 8px; }

/* header */
.top { position: sticky; top: 0; z-index: 30; background: rgba(5, 5, 5, .72); backdrop-filter: saturate(140%) blur(14px); -webkit-backdrop-filter: saturate(140%) blur(14px); border-bottom: 1px solid transparent; }
.top .wrap { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 600; font-size: 17px; letter-spacing: -.01em; }
.top nav { display: flex; align-items: center; gap: 28px; font-size: 14px; color: var(--dim); }
.top nav a:hover { color: var(--text); }
.top .gh { color: var(--text); font-size: 13px; padding: 8px 14px; border: 1px solid var(--line2); border-radius: 999px; background: rgba(255, 255, 255, .03); }

/* type */
h1 { font-weight: 600; font-size: clamp(46px, 8.4vw, 112px); line-height: .95; letter-spacing: -.055em; margin: 28px auto 0; max-width: 12ch; }
h2 { font-weight: 600; font-size: clamp(32px, 4.6vw, 58px); line-height: 1.03; letter-spacing: -.045em; margin-top: 14px; max-width: 20ch; }
h3 { font-weight: 600; font-size: 18px; letter-spacing: -.015em; }
.dim { background: linear-gradient(180deg, #a0a0a0, #3c3c3c); -webkit-background-clip: text; background-clip: text; color: transparent; }
h1 .dim { display: block; padding-bottom: .06em; }
.eyebrow { font-size: 13px; color: var(--dim); letter-spacing: .02em; }
.sub { color: var(--dim); font-size: 17px; margin-top: 20px; max-width: 520px; }
.lede { max-width: 560px; margin: 26px auto 0; font-size: 19px; color: var(--dim); }
code { font-size: .9em; background: rgba(255, 255, 255, .06); padding: 1px 6px; border-radius: 5px; }

/* buttons */
.btns { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 34px; }
.btn { font-weight: 600; font-size: 15px; padding: 13px 22px; border-radius: 999px; border: 1px solid var(--line2); transition: background .2s, border-color .2s; }
.btn:hover { border-color: rgba(255, 255, 255, .35); }
.btn.primary { background: var(--text); color: var(--bg); border-color: var(--text); box-shadow: 0 0 0 6px rgba(255, 255, 255, .05); }
.btn.primary:hover { background: #fff; }

/* hero */
.hero { position: relative; text-align: center; padding-top: 76px; overflow: hidden; }
.hero::before { content: ""; position: absolute; left: 0; right: 0; top: -260px; height: 760px; background: radial-gradient(600px 300px at 50% 0, rgba(255, 255, 255, .07), transparent 70%); pointer-events: none; }
.pill { display: inline-flex; align-items: center; gap: 10px; font-size: 13px; color: var(--dim); padding: 6px 14px 6px 6px; border: 1px solid var(--line2); border-radius: 999px; background: rgba(255, 255, 255, .03); }
.pill b { font-weight: 600; color: var(--bg); background: var(--text); padding: 2px 9px; border-radius: 999px; font-size: 12px; }

.stage { position: relative; margin: 72px auto 0; max-width: 1160px; height: 560px; }
.glow { position: absolute; left: 50%; top: -60px; width: 1400px; height: 360px; transform: translateX(-50%); background: radial-gradient(closest-side, rgba(255, 255, 255, .16), rgba(255, 255, 255, .05) 55%, transparent); pointer-events: none; }
.arc { position: absolute; left: 50%; top: 40px; width: 1900px; height: 1900px; transform: translateX(-50%); border-radius: 50%;
  background: radial-gradient(ellipse 46% 7% at 50% 0, rgba(255, 255, 255, .11), transparent), var(--bg);
  box-shadow: 0 -1px 0 rgba(255, 255, 255, .55); }
.arc::before { content: ""; position: absolute; inset: -1.5px; border-radius: 50%; padding: 1.5px;
  background: conic-gradient(from 270deg, transparent 0 8%, #fff 25%, transparent 42%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite: xor; mask-composite: exclude; }

.win { position: absolute; left: 50%; top: 110px; width: 920px; transform: translateX(-50%) perspective(1600px) rotateX(10deg); border-radius: 16px; border: 1px solid var(--line2);
  background: linear-gradient(180deg, #141414, #0a0a0a); box-shadow: 0 40px 120px -20px rgba(0, 0, 0, .95); overflow: hidden; z-index: 2; text-align: left;
  animation: rise 1.1s cubic-bezier(.2, .7, .2, 1) both .15s; }
@keyframes rise { from { opacity: 0; transform: translateX(-50%) translateY(40px) perspective(1600px) rotateX(18deg); } }
.bar { display: flex; align-items: center; gap: 8px; padding: 12px 14px; border-bottom: 1px solid var(--line); }
.bar i { width: 11px; height: 11px; border-radius: 50%; background: #2a2a2a; }
.url { margin: 0 auto; font: 12px var(--mono); color: var(--faint); background: rgba(255, 255, 255, .04); padding: 4px 40px; border-radius: 7px; }
.app { display: grid; grid-template-columns: 1.25fr 1fr; gap: 18px; padding: 26px; }
.app .h { font-size: 13px; color: var(--dim); margin-bottom: 12px; }
.cal { display: flex; align-items: center; gap: 12px; padding: 13px 14px; border: 1px solid var(--line); border-radius: 11px; background: rgba(255, 255, 255, .02); margin-bottom: 9px; }
.cal b { font-weight: 600; font-size: 14px; display: block; }
.cal span { font-size: 12px; color: var(--faint); }
.mark { width: 30px; height: 30px; flex: none; border-radius: 8px; display: grid; place-items: center; font-weight: 600; font-size: 12px; background: rgba(255, 255, 255, .08); color: var(--text); }
.tag { margin-left: auto; font-size: 11px !important; padding: 3px 8px; border-radius: 6px; border: 1px solid var(--line2); color: var(--dim) !important; white-space: nowrap; }
.tag.live { color: var(--text) !important; border-color: rgba(255, 255, 255, .3); }
.tag.live::before { content: ""; display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: #fff; margin-right: 6px; vertical-align: 1px; box-shadow: 0 0 8px #fff; animation: pulse 2.4s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: .35; } }
.pv { border: 1px solid var(--line); border-radius: 12px; padding: 16px; background: rgba(255, 255, 255, .02); }
.nums { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 6px 0 14px; }
.nums div { border-radius: 9px; background: rgba(255, 255, 255, .03); padding: 10px; }
.nums b { display: block; font-size: 24px; letter-spacing: -.03em; }
.nums span { font-size: 11px; color: var(--faint); }
.row { display: flex; justify-content: space-between; font: 12.5px var(--mono); color: var(--dim); padding: 7px 0; border-top: 1px solid var(--line); }
.row em { font-style: normal; color: var(--text); }
.go { display: flex; gap: 8px; margin-top: 14px; }
.go span { flex: 1; text-align: center; font-size: 13px; font-weight: 600; padding: 9px; border-radius: 9px; border: 1px solid var(--line2); }
.go span:first-child { background: var(--text); color: var(--bg); }
.fade { position: absolute; left: 0; right: 0; bottom: 0; height: 110px; background: linear-gradient(transparent, var(--bg)); z-index: 3; }
.works { display: flex; gap: 46px; justify-content: center; align-items: center; flex-wrap: wrap; color: var(--faint); font-size: 15px; padding-bottom: 40px; position: relative; z-index: 4; }
.works span { font-size: 13px; }
.works b { font-weight: 600; color: #777; }

/* sections */
.band { padding: 120px 0 0; }
.band:last-of-type { padding-bottom: 0; }

/* before / after */
.ba { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 50px; }
.side { border: 1px solid var(--line); border-radius: 18px; background: var(--panel); padding: 26px; }
.side-h { font-size: 15px; color: var(--dim); display: flex; justify-content: space-between; }
.side-h b { color: var(--text); font-weight: 600; }
.cols { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 18px; }
.col { border: 1px solid var(--line); border-radius: 12px; padding: 12px; display: grid; gap: 8px; align-content: start; min-height: 130px; }
.col-h { font: 11px var(--mono); color: var(--faint); }
.e { display: flex; justify-content: space-between; gap: 10px; padding: 10px 12px; border-radius: 8px; font-size: 13px; font-weight: 600; text-align: left; }
.e span { font: 400 11px var(--mono); color: var(--faint); }
.e.own { background: rgba(255, 255, 255, .1); border-left: 2px solid #fff; }
.e.copy { background: repeating-linear-gradient(135deg, rgba(255, 255, 255, .07) 0 6px, rgba(255, 255, 255, .02) 6px 12px); border-left: 2px dashed rgba(255, 255, 255, .5); color: var(--dim); }
.e.clash { outline: 1px solid rgba(255, 255, 255, .55); outline-offset: 2px; }
.verdict { font: 12.5px var(--mono); color: var(--dim); margin-top: 16px; }
.verdict::before { content: "✓  "; color: var(--text); }
.verdict.bad { color: var(--text); }
.verdict.bad::before { content: "✕  "; }

/* orbit */
.orbit-sec { display: grid; grid-template-columns: 1fr 1.1fr; gap: 60px; align-items: center; }
.orbit { position: relative; aspect-ratio: 1; max-width: 500px; width: 100%; margin-left: auto; }
.ring { position: absolute; inset: 0; border-radius: 50%; border: 1px dashed var(--line2); }
.ring.r2 { inset: 17%; }
.ring.r3 { inset: 34%; border-style: solid; border-color: var(--line); }
.spin { position: absolute; inset: 0; animation: spin 18s linear infinite; }
.spin.rev { inset: 17%; animation-duration: 12s; animation-direction: reverse; }
.spin i { position: absolute; left: 50%; top: -4px; width: 7px; height: 7px; margin-left: -3.5px; border-radius: 50%; background: #fff; box-shadow: 0 0 14px #fff; }
@keyframes spin { to { transform: rotate(360deg); } }
.core { position: absolute; left: 50%; top: 50%; width: 92px; height: 92px; transform: translate(-50%, -50%); filter: drop-shadow(0 0 40px rgba(255, 255, 255, .2)); }
.node { position: absolute; transform: translate(-50%, -50%); display: flex; align-items: center; gap: 9px; font-size: 13px; font-weight: 600; padding: 8px 13px 8px 8px; border-radius: 12px; border: 1px solid var(--line2); background: #0e0e0e; white-space: nowrap; }
.node .mark { width: 24px; height: 24px; font-size: 10px; border-radius: 7px; }
.n1 { left: 50%; top: 0; } .n2 { left: 100%; top: 50%; } .n3 { left: 50%; top: 100%; } .n4 { left: 0; top: 50%; }

/* bento */
.bento { display: grid; grid-template-columns: repeat(6, 1fr); gap: 14px; margin-top: 54px; }
.card { grid-column: span 2; border: 1px solid var(--line); border-radius: 18px; background: linear-gradient(180deg, #101010, #0a0a0a); padding: 22px; min-height: 290px; display: flex; flex-direction: column; overflow: hidden; }
.card.w3 { grid-column: span 3; }
.card h3 { margin-top: auto; padding-top: 20px; }
.card p { font-size: 14px; color: var(--dim); margin-top: 6px; }
.demo { flex: 1; display: grid; place-items: center; }
.ev { width: 100%; max-width: 300px; display: grid; gap: 8px; }
.warn { width: 100%; max-width: 330px; border: 1px solid rgba(255, 255, 255, .25); background: rgba(255, 255, 255, .04); border-radius: 12px; padding: 14px; font-size: 13px; }
.warn b { display: block; margin-bottom: 4px; }
.warn span { color: var(--dim); }
.tags { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; max-width: 230px; }
.tags span { font: 12px var(--mono); padding: 6px 10px; border-radius: 7px; background: rgba(255, 255, 255, .05); color: var(--faint); }
.tags .mine { color: var(--text); background: repeating-linear-gradient(135deg, rgba(255, 255, 255, .1) 0 6px, rgba(255, 255, 255, .03) 6px 12px); outline: 1px solid rgba(255, 255, 255, .4); }
.invite { display: grid; gap: 4px; text-align: center; border: 1px dashed var(--line2); border-radius: 12px; padding: 14px 18px; }
.invite span { font-weight: 600; font-size: 14px; }
.invite em { font: normal 12px var(--mono); color: var(--faint); }
.purge { display: inline-block; font-size: 13px; font-weight: 600; border: 1px solid var(--line2); border-radius: 9px; padding: 10px 14px; background: rgba(255, 255, 255, .04); }

/* steps */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 50px; }
.step { border: 1px solid var(--line); border-radius: 18px; background: var(--panel); padding: 24px; }
.step .k { font: 12px var(--mono); color: var(--faint); }
.step h3 { font-size: 22px; letter-spacing: -.02em; margin-top: 6px; }
.step > p { color: var(--dim); font-size: 15px; margin-top: 6px; }
.ui { margin-top: 20px; border: 1px solid var(--line); border-radius: 12px; padding: 10px 14px; font: 12.5px var(--mono); color: var(--dim); background: #080808; }
.ui p { display: flex; justify-content: space-between; padding: 5px 0; }
.ui em { font-style: normal; color: var(--text); }

/* private */
.ledger { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line); border-radius: 18px; margin-top: 48px; overflow: hidden; }
.ledger div { padding: 28px 26px; border-right: 1px solid var(--line); }
.ledger div:last-child { border-right: 0; }
.ledger b { display: block; font-size: 56px; font-weight: 600; letter-spacing: -.05em; line-height: 1; background: linear-gradient(180deg, #fff, #6a6a6a); -webkit-background-clip: text; background-clip: text; color: transparent; }
.ledger span { display: block; margin-top: 8px; font: 12.5px var(--mono); color: var(--dim); }
.facts, .limits { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0 28px; margin-top: 34px; }
.facts div, .limits div { border-top: 1px solid var(--line2); padding-top: 16px; }
.facts dt, .limits dt { font-weight: 600; font-size: 15px; }
.facts dd, .limits dd { color: var(--dim); font-size: 15px; margin-top: 4px; }
.limits { margin-top: 44px; }

/* compare */
.cmp { margin-top: 46px; border: 1px solid var(--line); border-radius: 18px; overflow: hidden; }
.cmp .r { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr 1.2fr; padding: 18px 24px; border-bottom: 1px solid var(--line); font-size: 15px; color: var(--dim); align-items: center; }
.cmp .r:last-child { border-bottom: 0; }
.cmp .r.h { font: 12px var(--mono); color: var(--faint); background: #0a0a0a; }
.cmp .r.us { background: linear-gradient(90deg, rgba(255, 255, 255, .08), rgba(255, 255, 255, .02)); color: var(--text); }
.cmp .r b { color: var(--text); font-weight: 600; }

/* install */
.codes { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 46px; }
.code { border: 1px solid var(--line); border-radius: 18px; background: var(--panel); padding: 24px; min-width: 0; }
.code-h { font-weight: 600; }
.code pre { margin-top: 14px; background: #030303; border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px; overflow-x: auto; }
.code pre code { background: none; padding: 0; font-size: 13.5px; line-height: 1.85; color: #d6d6d6; }
.code > p:last-child { color: var(--dim); font-size: 15px; margin-top: 14px; }
.code > p:last-child code { word-break: break-all; }

/* closing */
.closing { position: relative; text-align: center; margin-top: 140px; padding: 110px 0 300px; overflow: hidden; }
.closing h2 { margin: 0 auto; font-size: clamp(40px, 6vw, 80px); max-width: none; position: relative; z-index: 2; }
.closing .btns { position: relative; z-index: 2; }
.closing .glow { top: auto; bottom: -10px; height: 300px; }
.closing .arc { top: auto; bottom: -1730px; }

/* footer */
.foot { border-top: 1px solid var(--line); }
.foot .wrap { display: flex; align-items: center; gap: 28px; padding-top: 28px; padding-bottom: 28px; color: var(--faint); font-size: 13px; }
.foot .brand { color: var(--text); font-size: 15px; }
.foot nav { display: flex; gap: 22px; }
.foot nav a:hover { color: var(--text); }
.foot p { margin-left: auto; }

/* 404 */
.nf { padding: 140px 24px 160px; text-align: center; }
.nf h1 { font-size: clamp(40px, 6vw, 72px); }
.nf p { color: var(--dim); margin-top: 18px; }

@media (max-width: 1000px) {
  .win { width: calc(100% - 48px); }
  .orbit-sec { grid-template-columns: 1fr; }
  .orbit { margin: 40px auto 30px; max-width: 360px; }
  .bento { grid-template-columns: 1fr 1fr; }
  .card, .card.w3 { grid-column: auto; }
  .facts, .limits { grid-template-columns: 1fr 1fr; gap: 24px 28px; }
}
@media (max-width: 720px) {
  .top nav .sec { display: none; }
  .hero { padding-top: 48px; }
  .lede { font-size: 17px; }
  .stage { height: 520px; margin-top: 56px; }
  .arc { top: 30px; width: 1100px; height: 1100px; }
  .glow { width: 700px; }
  .win { width: calc(100% - 32px); transform: translateX(-50%); animation-name: rise-flat; }
  @keyframes rise-flat { from { opacity: 0; transform: translateX(-50%) translateY(30px); } }
  .app { grid-template-columns: 1fr; padding: 16px; }
  .app .pv { display: none; }
  .works { gap: 10px 22px; font-size: 14px; }
  .band { padding-top: 84px; }
  .ba, .cols, .bento, .steps, .codes { grid-template-columns: 1fr; }
  .orbit { max-width: 250px; }
  .node { font-size: 11px; padding: 5px 9px 5px 5px; }
  .node .mark { width: 20px; height: 20px; }
  .card { min-height: 250px; }
  .ledger { grid-template-columns: 1fr 1fr; }
  .ledger div:nth-child(2) { border-right: 0; }
  .ledger div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .ledger b { font-size: 42px; }
  .facts, .limits { grid-template-columns: 1fr; }
  .cmp .r { grid-template-columns: 1.3fr 1fr; padding: 14px 16px; }
  .cmp .r > :nth-child(n+3) { display: none; }
  .closing { margin-top: 90px; padding: 70px 0 200px; }
  .closing .arc { width: 1100px; height: 1100px; bottom: -980px; }
  .foot .wrap { flex-wrap: wrap; gap: 14px 22px; }
  .foot p { margin-left: 0; width: 100%; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .win, .spin, .tag.live::before { animation: none; }
}