/* Certus Golf — shared stylesheet.
   Extracted from index.html 2026-07-14 when Swing / Stats / Course became their
   own pages: four copies of 188 lines would drift the moment one was edited.
   privacy/terms/support keep their own prose styles for now — they share the
   tokens below but not the layout. */

:root {
    --night: #05100f;
    --night-2: #081815;
    --panel: #0b1c19;
    --panel-2: #0f2521;
    --line: #1d332e;
    --tracer: #4dffa0;
    --tracer-dim: #2fae74;
    --gold: #f2b33d;
    --purple: #9a8be8;
    --ink: #e9f4ee;
    --ink-soft: #93a89f;
    --ink-faint: #5f736b;
    --red: #ff7a63;

    --maxw: 1160px;
    --f-poster: "Anton", "Arial Narrow", sans-serif;
    --f-sans: "Hanken Grotesk", system-ui, sans-serif;
    --f-mono: "Martian Mono", ui-monospace, monospace;
    color-scheme: dark;
  }
  * { box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  @media (prefers-reduced-motion: reduce){ html{ scroll-behavior:auto; } }
  body { margin:0; background: var(--night); color: var(--ink); font-family: var(--f-sans); font-size:17px; line-height:1.6; -webkit-font-smoothing:antialiased; overflow-x:hidden; }
  a { color:inherit; text-decoration:none; }
  .wrap { max-width: var(--maxw); margin:0 auto; padding:0 26px; }
  .poster { font-family: var(--f-poster); font-weight:400; text-transform:uppercase; line-height:0.9; letter-spacing:0.01em; margin:0; }
  .mono { font-family: var(--f-mono); }
  .tele { font-family: var(--f-mono); font-size:11px; letter-spacing:.18em; text-transform:uppercase; color: var(--tracer); }

  /* ---------- Nav ---------- */
  header.nav { position: sticky; top:0; z-index:60; background: color-mix(in srgb, var(--night) 84%, transparent); backdrop-filter: blur(12px); border-bottom:1px solid var(--line); }
  .nav-inner { display:flex; align-items:center; justify-content:space-between; height:66px; }
  .brand { display:flex; align-items:center; gap:11px; }
  .brand .mark { width:34px; height:34px; flex:none; border-radius:9px; box-shadow: 0 0 0 1px var(--line); }
  .brand .wordmark { font-family: var(--f-poster); font-size:23px; letter-spacing:.03em; text-transform:uppercase; }
  .brand .wordmark b { color: var(--tracer); font-weight:400; }
  .nav-links { display:flex; align-items:center; gap:28px; }
  .nav-links a.navlink { font-family:var(--f-mono); font-size:11.5px; letter-spacing:.1em; text-transform:uppercase; color:var(--ink-soft); transition:color .2s; }
  .nav-links a.navlink:hover { color: var(--tracer); }
  .btn { display:inline-flex; align-items:center; gap:9px; font-family:var(--f-mono); font-size:12px; font-weight:500; letter-spacing:.08em; text-transform:uppercase; padding:11px 18px; border-radius:2px; border:1px solid transparent; cursor:pointer; transition: background .2s, box-shadow .25s, transform .15s, color .2s; }
  .btn-primary { background: var(--tracer); color:#04140c; box-shadow: 0 0 24px -6px var(--tracer); }
  .btn-primary:hover { transform: translateY(-1px); box-shadow: 0 0 34px -4px var(--tracer); }
  .btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
  .btn-ghost:hover { border-color: var(--tracer); color: var(--tracer); }
  @media (max-width: 840px){ .nav-links a.navlink{ display:none; } }

  /* ---------- Hero / tracer stage ---------- */
  .hero { position: relative; min-height: 88vh; display:flex; align-items:center; overflow:hidden; padding: 40px 0 60px; }
  .stage-svg { position:absolute; inset:0; width:100%; height:100%; z-index:0; }
  .hero::after { content:""; position:absolute; inset:0; z-index:1; pointer-events:none; background: radial-gradient(120% 80% at 15% 90%, color-mix(in srgb, var(--tracer) 8%, transparent), transparent 55%), linear-gradient(180deg, transparent 55%, var(--night) 98%); }
  .hero .wrap { position:relative; z-index:2; width:100%; }
  .hero .ey { display:flex; align-items:center; gap:12px; }
  .hero .ey::before { content:""; width:34px; height:1px; background: var(--tracer); box-shadow:0 0 8px var(--tracer); }
  .hero h1 { font-family: var(--f-poster); text-transform:uppercase; line-height:0.86; letter-spacing:.005em; font-size: clamp(64px, 13vw, 168px); margin:18px 0 0; }
  .hero h1 .g { color: var(--tracer); text-shadow: 0 0 34px color-mix(in srgb, var(--tracer) 55%, transparent); }
  .hero .def { font-family:var(--f-mono); font-size:12.5px; color:var(--ink-soft); margin:24px 0 0; letter-spacing:.02em; }
  .hero .def b { color: var(--gold); }
  .hero .lede { font-size:19px; color:var(--ink-soft); max-width: 40ch; margin:16px 0 0; }
  .hero-cta { display:flex; gap:12px; margin-top:30px; flex-wrap:wrap; }
  .arc { fill:none; stroke: var(--tracer); stroke-width:2.4; stroke-linecap:round; filter: drop-shadow(0 0 6px color-mix(in srgb,var(--tracer) 70%, transparent)); }
  .arc-faint { fill:none; stroke: var(--tracer); stroke-width:1; opacity:.16; stroke-dasharray:2 7; }
  #tracerBall { fill:#fff; filter: drop-shadow(0 0 7px var(--tracer)); }
  .callout { opacity:0; }
  .callout.show { animation: fadeUp .6s ease forwards; }
  @keyframes fadeUp { from{ opacity:0; transform: translateY(6px);} to{ opacity:1; transform:none;} }
  @media (prefers-reduced-motion: reduce){ .callout{ opacity:1; } }

  /* ---------- Sections ---------- */
  section.plate { padding: 96px 0; position: relative; }
  section.plate + section.plate { border-top:1px solid var(--line); }
  .head { display:grid; grid-template-columns: auto 1fr; gap: 34px; align-items:start; margin-bottom: 52px; }
  @media (max-width:720px){ .head{ grid-template-columns:1fr; gap:14px; } }
  .head .idx { font-family: var(--f-poster); font-size: clamp(74px, 12vw, 150px); line-height:.8; color: transparent; -webkit-text-stroke: 1.5px var(--tracer-dim); text-shadow: 0 0 30px color-mix(in srgb,var(--tracer) 22%, transparent); }
  .head .ht .tele { display:block; margin-bottom:12px; }
  .head .ht h2 { font-family: var(--f-poster); text-transform:uppercase; font-size: clamp(34px, 5.4vw, 66px); line-height:.92; margin:0; }
  .head .ht p { font-size:18.5px; color:var(--ink-soft); margin:18px 0 0; max-width: 60ch; }
  .head.center { text-align:center; grid-template-columns:1fr; justify-items:center; }

  .split { display:grid; grid-template-columns: 1fr 1fr; gap:52px; align-items:center; }
  .split.rev { direction:rtl; } .split.rev > * { direction:ltr; }
  @media (max-width:880px){ .split{ grid-template-columns:1fr; gap:38px; } .split.rev{ direction:ltr; } }

  /* telemetry feature list */
  .tlist { display:grid; }
  .tlist .row { display:grid; grid-template-columns: 52px 1fr; gap:18px; padding:18px 0; border-top:1px solid var(--line); }
  .tlist .row:last-child { border-bottom:1px solid var(--line); }
  .tlist .k { font-family:var(--f-mono); font-size:12px; color:var(--tracer-dim); padding-top:4px; letter-spacing:.04em; }
  .tlist h4 { font-family:var(--f-sans); font-weight:800; font-size:19px; margin:0; letter-spacing:-.01em; }
  .tlist p { margin:5px 0 0; color:var(--ink-soft); font-size:15.5px; line-height:1.5; }
  .tlist .tag { font-family:var(--f-mono); font-size:10px; letter-spacing:.08em; text-transform:uppercase; color:var(--gold); border:1px solid color-mix(in srgb,var(--gold) 45%, transparent); border-radius:2px; padding:1px 6px; margin-left:8px; white-space:nowrap; }

  /* panel */
  .panel { background: linear-gradient(180deg, var(--panel-2), var(--panel)); border:1px solid var(--line); position:relative; }
  .panel::before { content:""; position:absolute; top:-1px; left:22px; right:22px; height:1px; background: linear-gradient(90deg, transparent, var(--tracer), transparent); opacity:.7; }
  .panel .p-top { display:flex; justify-content:space-between; align-items:center; padding:12px 18px; border-bottom:1px solid var(--line); font-family:var(--f-mono); font-size:11px; letter-spacing:.08em; text-transform:uppercase; color:var(--ink-soft); }
  .panel .p-top b { color: var(--tracer); font-weight:500; }
  .panel .p-body { padding:22px; }
  .panel svg { display:block; width:100%; height:auto; }

  /* subhead */
  .subhead { display:flex; align-items:center; gap:14px; margin:60px 0 24px; font-family:var(--f-mono); font-size:12px; letter-spacing:.16em; text-transform:uppercase; color:var(--tracer); }
  .subhead::after { content:""; flex:1; height:1px; background:var(--line); }

  /* modes */
  .modes { display:grid; grid-template-columns:repeat(3,1fr); gap:16px; }
  @media (max-width:860px){ .modes{ grid-template-columns:1fr; max-width:460px; margin:0 auto; } }
  .mode { background: var(--panel); border:1px solid var(--line); display:flex; flex-direction:column; transition: border-color .25s, transform .2s, box-shadow .3s; }
  .mode:hover { border-color: var(--tracer-dim); transform: translateY(-4px); box-shadow: 0 24px 50px -34px var(--tracer); }
  .mode.star { border-color: var(--tracer-dim); }
  .mode .viz { height:130px; border-bottom:1px solid var(--line); position:relative; display:grid; place-items:center; background: radial-gradient(120% 130% at 50% 0%, var(--panel-2), var(--panel)); }
  .mode .viz svg { width:100%; height:100%; }
  .mode .badge { position:absolute; top:10px; right:10px; font-family:var(--f-mono); font-size:9.5px; letter-spacing:.08em; text-transform:uppercase; padding:2px 7px; border-radius:2px; }
  .mode .badge.primary { background: var(--tracer); color:#04140c; }
  .mode .badge.alt { color: var(--gold); border:1px solid color-mix(in srgb,var(--gold) 45%, transparent); }
  .mode .body { padding:20px; display:flex; flex-direction:column; gap:8px; flex:1; }
  .mode .mno { font-family:var(--f-mono); font-size:11px; color:var(--ink-faint); letter-spacing:.1em; }
  .mode h3 { font-family:var(--f-poster); font-size:28px; letter-spacing:.02em; text-transform:uppercase; }
  .mode p { margin:0; color:var(--ink-soft); font-size:15px; line-height:1.5; }
  .mode ul { list-style:none; margin:6px 0 0; padding:0; display:grid; gap:6px; }
  .mode ul li { font-family:var(--f-mono); font-size:11.5px; color:var(--ink-soft); display:flex; gap:9px; align-items:flex-start; }
  .mode ul li::before { content:""; width:6px; height:6px; margin-top:5px; flex:none; background: var(--tracer); box-shadow:0 0 6px var(--tracer); }

  /* strokes gained */
  .sg { display:grid; gap:13px; }
  .sg .row { display:grid; grid-template-columns:92px 1fr 46px; gap:12px; align-items:center; }
  .sg .row .name { font-family:var(--f-mono); font-size:11.5px; color:var(--ink-soft); text-transform:uppercase; letter-spacing:.03em; }
  .sg .row .barwrap { height:20px; border:1px solid var(--line); position:relative; background: var(--night-2); }
  .sg .row .barwrap .mid { position:absolute; left:50%; top:0; bottom:0; width:1px; background:var(--ink-faint); }
  .sg .row .barwrap .fill { position:absolute; top:2px; bottom:2px; }
  .sg .row .barwrap .fill.pos { left:50%; background: var(--tracer); box-shadow:0 0 12px -2px var(--tracer); }
  .sg .row .barwrap .fill.neg { right:50%; background: var(--red); opacity:.8; }
  .sg .row .val { font-family:var(--f-mono); font-size:13px; text-align:right; }
  .sg .row .val.pos { color: var(--tracer); } .sg .row .val.neg { color: var(--red); }
  .note { margin-top:20px; border:1px solid color-mix(in srgb,var(--gold) 40%, transparent); border-left-width:3px; background: color-mix(in srgb,var(--gold) 8%, transparent); padding:13px 16px; }
  .note .nh { font-family:var(--f-mono); font-size:10.5px; letter-spacing:.12em; text-transform:uppercase; color:var(--gold); }
  .note p { margin:6px 0 0; font-size:15.5px; line-height:1.45; }

  /* readout */
  .rf { border:1px solid var(--line); }
  .rf .rf-row { display:flex; justify-content:space-between; align-items:center; padding:11px 15px; border-top:1px solid var(--line); font-family:var(--f-mono); }
  .rf .rf-row:first-child { border-top:0; }
  .rf .rf-row span:first-child { font-size:11px; letter-spacing:.05em; text-transform:uppercase; color:var(--ink-soft); }
  .rf .rf-row span:last-child { font-size:14px; }
  .rf .rf-row.hl { background: color-mix(in srgb,var(--tracer) 9%, transparent); }
  .rf .rf-row.hl span:first-child { color: var(--tracer); }
  .rf .rf-row.hl span:last-child { color: var(--tracer); font-weight:600; font-size:16px; }

  /* appendix grid */
  .grid3 { display:grid; grid-template-columns:repeat(3,1fr); gap:16px; }
  @media (max-width:900px){ .grid3{ grid-template-columns:1fr 1fr; } }
  @media (max-width:600px){ .grid3{ grid-template-columns:1fr; } }
  /* `.cell` is used both as a <div> and (on the index hub) as an <a>.
     Anchors are inline by default, which collapses the padding/border —
     force block so it lays out identically either way. */
  .cell { display:block; padding:24px; background: var(--panel); border:1px solid var(--line); transition: border-color .25s, transform .2s; }
  .cell:hover { border-color: var(--tracer-dim); transform: translateY(-3px); }
  .cell .cno { font-family:var(--f-mono); font-size:11px; letter-spacing:.08em; color:var(--gold); }
  .cell .ic { color: var(--tracer); margin:12px 0; }
  .cell h4 { font-family:var(--f-sans); font-weight:800; font-size:18px; margin:0 0 6px; }
  .cell p { margin:0; color:var(--ink-soft); font-size:14.5px; line-height:1.5; }
  .cell .kv { margin-top:12px; font-family:var(--f-mono); font-size:10.5px; letter-spacing:.05em; color:var(--ink-faint); text-transform:uppercase; }

  /* CTA */
  .cta { position:relative; padding:0; overflow:hidden; border-top:1px solid var(--line); }
  .cta .stage-svg { opacity:.9; }
  .cta-inner { position:relative; z-index:2; text-align:center; padding:110px 0; }
  .cta-inner h2 { font-family:var(--f-poster); text-transform:uppercase; font-size: clamp(48px, 9vw, 132px); line-height:.86; margin:0; }
  .cta-inner h2 .g { color: var(--tracer); text-shadow:0 0 34px color-mix(in srgb,var(--tracer) 50%, transparent); }
  .cta-inner p { color:var(--ink-soft); font-size:19px; max-width:52ch; margin:20px auto 0; }
  .cta-inner .hero-cta { justify-content:center; margin-top:30px; }

  /* footer */
  footer { border-top:1px solid var(--line); background: var(--night-2); padding:46px 0 36px; }
  .foot-grid { display:flex; justify-content:space-between; gap:40px; flex-wrap:wrap; }
  footer .colophon { max-width:320px; }
  footer .colophon p { color:var(--ink-soft); font-size:14.5px; line-height:1.55; margin:13px 0 0; }
  footer .colophon p i { color: var(--tracer-dim); font-style:italic; }
  footer .fcol h5 { font-family:var(--f-mono); font-size:11px; letter-spacing:.14em; text-transform:uppercase; color:var(--ink-faint); margin:0 0 12px; font-weight:500; }
  footer .fcol a { display:block; font-family:var(--f-mono); font-size:12.5px; color:var(--ink-soft); padding:4px 0; letter-spacing:.03em; }
  footer .fcol a:hover { color: var(--tracer); }
  .foot-bottom { margin-top:40px; padding-top:20px; border-top:1px solid var(--line); display:flex; justify-content:space-between; gap:16px; flex-wrap:wrap; font-family:var(--f-mono); font-size:11.5px; color:var(--ink-faint); letter-spacing:.03em; }

  .reveal { opacity:0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
  .reveal.in { opacity:1; transform:none; }
  @media (prefers-reduced-motion: reduce){ .reveal{ opacity:1; transform:none; transition:none; } }
  ::selection { background: color-mix(in srgb, var(--tracer) 30%, transparent); color:#fff; }
  :focus-visible { outline:2px solid var(--tracer); outline-offset:3px; }