/* zafe: bright glass over a soft iridescent orb. Manrope + JetBrains Mono. */
@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');
* { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #F6F8FA; --ink: #0B1220; --muted: #5d6a82; --soft: #44506a; --line: rgba(11,18,32,.08);
  --mint: #11A683; --violet: #5B6CFF; --glass: rgba(255,255,255,.62); --glass-edge: rgba(255,255,255,.9);
}
html, body { background: var(--bg); color: var(--ink); }
body { font: 400 15px/1.65 'Manrope', system-ui, sans-serif; min-height: 100vh; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: underline; text-decoration-color: rgba(11,18,32,.25); text-underline-offset: 3px; }
a:hover { text-decoration-color: var(--ink); }
.mono { font-family: 'JetBrains Mono', ui-monospace, monospace; }

/* background */
.glow { position: fixed; inset: 0; overflow: hidden; z-index: 0; pointer-events: none; }
.glow .orb { position: absolute; width: 62vw; height: 62vw; right: -12vw; top: -10vw; border-radius: 50%; background: conic-gradient(from 200deg, #9EF3D6, #B9C8FF, #E7C7FF, #FFE3B0, #9EF3D6); filter: blur(70px); opacity: .75; animation: spin 30s linear infinite; }
.glow .orb.two { width: 38vw; height: 38vw; left: -14vw; right: auto; top: auto; bottom: -16vw; opacity: .45; animation-duration: 42s; animation-direction: reverse; }
.glow.quiet .orb { opacity: .5; }
.glow.quiet .orb.two { opacity: .3; }
@keyframes spin { to { transform: rotate(360deg); } }

/* header */
nav { position: relative; z-index: 5; display: flex; justify-content: space-between; align-items: center; padding: 26px 44px; }
.brand { font: 800 24px/1 'Manrope', sans-serif; letter-spacing: -.035em; text-decoration: none; display: flex; align-items: center; gap: 10px; }
.brand svg { flex: none; }
.links { display: flex; gap: 24px; flex-wrap: wrap; justify-content: flex-end; }
.links a { font: 500 13px/1 'Manrope', sans-serif; text-decoration: none; color: var(--soft); }
.links a:hover, .links a.on { color: var(--ink); }

/* home */
.home { position: relative; z-index: 5; min-height: 100vh; display: flex; flex-direction: column; }
.hero { flex: 1; display: grid; grid-template-columns: 1.1fr .9fr; align-items: center; gap: 40px; padding: 10px 44px 40px; }
h1.big { font: 800 clamp(40px, 4.6vw, 64px)/1.03 'Manrope', sans-serif; letter-spacing: -.045em; }
h1.big em { font-style: normal; background: linear-gradient(90deg, var(--mint), var(--violet)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { margin-top: 22px; max-width: 480px; font-size: 17px; color: #3e4a60; }
.cta { margin-top: 30px; display: flex; gap: 10px; flex-wrap: wrap; }
.cta a { font: 700 14px/1 'Manrope', sans-serif; padding: 15px 20px; border-radius: 14px; text-decoration: none; }
.cta .p { background: var(--ink); color: #fff; }
.cta .s { background: rgba(255,255,255,.7); border: 1px solid var(--line); backdrop-filter: blur(10px); }
.note { margin-top: 18px; font-size: 12px; color: var(--muted); }
.card { justify-self: center; width: min(390px, 100%); padding: 26px; border-radius: 26px; background: var(--glass); border: 1px solid var(--glass-edge); backdrop-filter: blur(22px); -webkit-backdrop-filter: blur(22px); box-shadow: 0 30px 80px rgba(40,60,120,.14); }
.card .t { font: 700 11px/1 'Manrope', sans-serif; color: var(--muted); letter-spacing: .1em; text-transform: uppercase; }
.card .num { margin-top: 12px; font: 800 42px/1 'Manrope', sans-serif; letter-spacing: -.035em; }
.card .num small { font-size: 16px; color: var(--muted); font-weight: 700; }
.card .row { display: flex; justify-content: space-between; margin-top: 16px; padding-top: 13px; border-top: 1px solid var(--line); font: 400 12px/1.4 'JetBrains Mono', monospace; color: var(--soft); }
.card .key { margin-top: 16px; padding: 12px; border-radius: 12px; background: rgba(11,18,32,.04); font: 400 11px/1.5 'JetBrains Mono', monospace; color: var(--soft); word-break: break-all; }
.readouts { display: grid; grid-template-columns: repeat(4, 1fr); padding: 0 44px 34px; font: 600 12px/1.5 'Manrope', sans-serif; color: var(--muted); }
.readouts div { padding-top: 14px; border-top: 1px solid var(--line); }
.readouts b { display: block; font: 800 17px/1.4 'Manrope', sans-serif; color: var(--ink); }

/* pages */
main.page { position: relative; z-index: 5; max-width: 880px; margin: 0 auto; padding: 16px 44px 80px; }
.sheet { background: var(--glass); border: 1px solid var(--glass-edge); border-radius: 24px; backdrop-filter: blur(22px); -webkit-backdrop-filter: blur(22px); box-shadow: 0 20px 60px rgba(40,60,120,.08); padding: 34px 38px; }
.sheet + .sheet { margin-top: 16px; }
h1 { font: 800 36px/1.05 'Manrope', sans-serif; letter-spacing: -.04em; margin-bottom: 14px; }
h2 { font: 800 20px/1.2 'Manrope', sans-serif; letter-spacing: -.02em; margin: 30px 0 10px; }
.sheet > h2:first-child { margin-top: 0; }
p { margin: 0 0 12px; }
.lede { color: #3e4a60; max-width: 660px; }
table { width: 100%; border-collapse: collapse; margin: 8px 0 6px; font: 400 12px/1.5 'JetBrains Mono', monospace; }
th, td { text-align: left; padding: 9px 10px 9px 0; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font: 700 11px/1.4 'Manrope', sans-serif; color: var(--muted); letter-spacing: .04em; text-transform: uppercase; }
td.v, .kv td:last-child { word-break: break-all; }
.kv td:first-child { font-family: 'Manrope', sans-serif; font-weight: 600; color: var(--muted); width: 34%; }
.empty { color: var(--muted); }
.formula { font: 400 13px/1.7 'JetBrains Mono', monospace; background: rgba(255,255,255,.7); border: 1px solid var(--line); border-radius: 14px; padding: 12px 16px; margin: 10px 0 14px; white-space: pre-wrap; }
code { font: 400 12.5px 'JetBrains Mono', monospace; background: rgba(11,18,32,.05); padding: 2px 6px; border-radius: 6px; }
.key { font: 400 11px/1.6 'JetBrains Mono', monospace; word-break: break-all; background: rgba(11,18,32,.04); padding: 14px; border-radius: 14px; }

/* forms */
.form { display: grid; gap: 10px; max-width: 560px; margin-top: 12px; }
.form label { font: 700 11px/1.4 'Manrope', sans-serif; color: var(--muted); letter-spacing: .04em; text-transform: uppercase; }
.form input { width: 100%; font: 400 14px 'JetBrains Mono', monospace; padding: 12px 14px; border: 1px solid rgba(11,18,32,.14); border-radius: 12px; background: rgba(255,255,255,.85); color: var(--ink); outline: none; }
.form input:focus { border-color: var(--violet); box-shadow: 0 0 0 3px rgba(91,108,255,.15); }
button { font: 700 14px 'Manrope', sans-serif; padding: 14px 20px; border: 0; border-radius: 14px; background: var(--ink); color: #fff; cursor: pointer; justify-self: start; }
button:disabled { opacity: .45; cursor: default; }
.msg { font-size: 13px; min-height: 1.5em; color: var(--soft); }
.msg.err { color: #c0392b; }
.small { font-size: 12.5px; color: var(--muted); }

.preview-tag { position: fixed; bottom: 12px; right: 12px; z-index: 9; font: 700 10px 'Manrope', sans-serif; background: var(--ink); color: #fff; padding: 5px 9px; border-radius: 8px; }

@media (max-width: 800px) {
  nav { padding: 18px 16px; flex-wrap: wrap; row-gap: 12px; }
  .links { gap: 16px; width: 100%; justify-content: flex-start; }
  .hero { grid-template-columns: 1fr; padding: 8px 16px 24px; }
  h1.big { font-size: 42px; }
  .lead { font-size: 16px; }
  .readouts { grid-template-columns: repeat(2, 1fr); padding: 0 16px 24px; row-gap: 14px; }
  main.page { padding: 8px 16px 60px; }
  .sheet { padding: 24px 20px; border-radius: 20px; }
  table { font-size: 11px; }
}