/* davidhunter.ai — "The Trail" (2026-09-05 rebuild)
   One dashed path down the page, five waypoints. Native scroll only.
   Progressive: html.no-js = everything visible, no motion. html.js adds the
   drawn trail line, active markers, hero fade. prefers-reduced-motion = static. */

*,*::before,*::after{box-sizing:border-box}
:root{
  /* Contrast pass 2026-09-22 (WCAG 2.2 AA, 4.5:1 for text). Three values darkened/lightened along
     their own hue, by the smallest step that passes on EVERY ground they sit on — including --sky-2,
     the top of the waypoint gradient, which is the worst case:
       --ink-3        #8593A0 -> #596672   2.74 -> 5.12 on sky, 2.49 -> 4.65 on sky-2, 5.89 on card
       --saffron-deep #B9801A -> #875D13   2.96 -> 5.07 on sky, 3.41 -> 5.82 on card; white-on-it 5.82
       --pine-muted   #B9CDC3 -> #BDD0C6   4.49 -> 4.64 on pine
     --saffron-light is new: saffron-hued TEXT on pine (plain --saffron is 3.34 there).
     Trade-off accepted: --ink-3 now sits close to --ink-2; kickers stay distinct by type
     (mono, uppercase, 12px), not by being pale. */
  --sky:#EAF0F4; --sky-2:#DDE6EC; --card:#FFFFFF; --ink:#24313A; --ink-2:#4F5E68; --ink-3:#596672;
  --line:#CBD6DE; --saffron:#E0A227; --saffron-deep:#875D13; --saffron-soft:#FBF2DC; --saffron-light:#ECC67A; --pine:#2F5D50; --pine-ink:#EEF3F0; --pine-muted:#BDD0C6;
  --disp:"Sora","Helvetica Neue",Arial,sans-serif; --body:"Karla","Helvetica Neue",Arial,sans-serif; --mono:"Red Hat Mono",Menlo,monospace;
  --nav-h:56px;
}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;background:var(--sky);color:var(--ink);font-family:var(--body);font-size:18px;line-height:1.6;overflow-x:hidden}
a{color:var(--saffron-deep)}
img,video,svg{max-width:100%}
.wrap{max-width:1040px;margin:0 auto;padding:0 22px}
.k{font-family:var(--mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3)}
.skip{position:absolute;left:-999px;top:8px;background:var(--ink);color:#fff;padding:8px 12px;border-radius:6px;z-index:100}
.skip:focus{left:8px}
:focus-visible{outline:2px solid var(--saffron-deep);outline-offset:2px}

/* ── nav ── */
.nav{position:sticky;top:0;z-index:20;background:rgba(234,240,244,.92);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;height:var(--nav-h)}
.brand{font-family:var(--disp);font-weight:700;text-decoration:none;color:var(--ink);white-space:nowrap}
.wps{display:flex;gap:6px;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch}
.wps::-webkit-scrollbar{display:none}
.wps a{text-decoration:none;font-family:var(--mono);font-size:12px;color:var(--ink-2);padding:6px 10px;border-radius:999px;white-space:nowrap;display:inline-flex;align-items:center;gap:6px}
.wps a i{width:18px;height:18px;border-radius:50%;border:2px solid var(--line);display:grid;place-items:center;font-size:10px;font-style:normal;font-weight:500;background:#fff;color:var(--ink);transition:background .2s,border-color .2s}
.wps a.on i,.wps a:hover i{border-color:var(--saffron);background:var(--saffron)}
.nav .ext{display:flex;gap:14px;font-family:var(--mono);font-size:12px}
.nav .ext a{color:var(--ink-2);text-decoration:none;white-space:nowrap}
.nav .ext a:hover{color:var(--ink)}

/* ── hero (motion) ── */
.hero{position:relative;overflow:hidden;background:var(--sky-2);min-height:min(88svh,760px);display:flex;align-items:flex-end;isolation:isolate}
.hero__media{position:absolute;inset:0;z-index:0}
.hero__media video,.hero__media img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center 40%}
.hero__media img{transform:scale(1)}
.js .hero__media img.kb{animation:kb 28s ease-in-out infinite alternate}
@keyframes kb{from{transform:scale(1)}to{transform:scale(1.07) translateY(-1.5%)}}
.hero__veil{position:absolute;inset:0;z-index:1;background:
  linear-gradient(180deg,rgba(234,240,244,.10) 0%,rgba(234,240,244,0) 30%,rgba(234,240,244,.55) 72%,rgba(234,240,244,.96) 100%),
  linear-gradient(90deg,rgba(234,240,244,.55) 0%,rgba(234,240,244,.35) 55%,rgba(234,240,244,0) 100%)}
.hero__txt{position:relative;z-index:2;width:100%;padding:clamp(48px,9vw,120px) 0 clamp(36px,6vw,64px)}
.hero h1{font-family:var(--disp);font-weight:700;font-size:clamp(34px,5.8vw,68px);line-height:1.02;letter-spacing:-.02em;margin:0 0 14px;max-width:14ch;text-wrap:balance}
.hero .lede{max-width:46ch;color:var(--ink);margin:0 0 22px;font-size:18px}
.hero .k{display:block;margin-bottom:14px;color:var(--ink)}
/* Hero text sits over a PHOTO/VIDEO, not a CSS background, so page-level contrast checks pass it
   falsely. Measured 2026-09-22 by compositing the poster + both veil layers under every text pixel:
   the lede failed on 99% of its pixels (median 3.68:1), the kicker on 100%. No veil strength alone
   fixed it (the darkest ridges win), so hero kicker/lede/cue use --ink and the veil's mid stop rose
   .12 -> .35. Worst single pixel after: kicker 7.7, h1 3.7 (large), lede 5.0, cue 9.3. The right
   side of the photo is untouched. Re-measure if the poster or video changes. */
.ctas{display:flex;gap:10px;flex-wrap:wrap}
.cta{display:inline-block;text-decoration:none;font-weight:600;padding:13px 20px;border-radius:999px;background:var(--saffron);color:var(--ink);font-family:var(--disp);font-size:15px;border:1.5px solid var(--saffron)}
.cta.g{background:rgba(234,240,244,.6);border-color:var(--ink);color:var(--ink)}
.cta:hover{filter:brightness(1.04)}
.hero__cue{position:absolute;right:22px;bottom:18px;z-index:2;font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink)}
.js .hero .k,.js .hero h1,.js .hero .lede,.js .ctas{animation:rise .9s cubic-bezier(.2,.7,.2,1) both}
.js .hero h1{animation-delay:.08s}.js .hero .lede{animation-delay:.18s}.js .ctas{animation-delay:.28s}
@keyframes rise{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){.js .hero *{animation:none!important}.js .hero__media img.kb{animation:none}}

/* ── trailhead ── */
.trailhead{padding:56px 0 24px}
.trailhead .g{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:start}
.trailhead h2{font-family:var(--disp);font-size:clamp(24px,3.4vw,34px);font-weight:600;letter-spacing:-.015em;margin:0 0 8px;line-height:1.15}
.trailhead p{color:var(--ink-2);margin:0 0 10px}
.picker{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:20px}
.picker h3{margin:0 0 4px;font-family:var(--disp);font-size:18px;font-weight:600}
.picker .sub{margin:0 0 12px;font-size:15px;color:var(--ink-2)}
.q{border-top:1px solid var(--line);padding:10px 0}
.q b{display:block;font-size:15px;font-weight:600;margin-bottom:4px}
.q label{display:flex;gap:9px;font-size:14px;color:var(--ink-2);padding:4px 0;cursor:pointer;align-items:flex-start}
.q input{margin-top:3px;accent-color:var(--saffron)}
.result{margin-top:12px;display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.pill{font-family:var(--mono);font-size:12px;padding:8px 12px;border-radius:999px;background:var(--ink);color:#fff}
.result a{font-weight:600}

/* ── the trail ── */
.trail{position:relative;padding:40px 0 20px}
.trail::before{content:"";position:absolute;left:32px;top:0;bottom:0;border-left:3px dashed var(--line)}
.trail__drawn{position:absolute;left:32px;top:0;height:0;border-left:3px dashed var(--saffron);pointer-events:none;transition:height .12s linear}
.no-js .trail__drawn{height:100%}
.wp{position:relative;display:grid;grid-template-columns:64px minmax(0,1fr);column-gap:10px;margin-bottom:56px;align-items:start}
.wp .marker{grid-column:1;grid-row:1;justify-self:center;width:44px;height:44px;border-radius:50%;background:var(--card);border:3px solid var(--line);display:grid;place-items:center;font-family:var(--disp);font-weight:700;font-size:16px;color:var(--ink);position:sticky;top:calc(var(--nav-h) + 20px);z-index:2;box-shadow:0 0 0 4px var(--sky);transition:background .25s,border-color .25s,transform .25s}
.wp.on .marker,.no-js .wp .marker{background:var(--saffron);border-color:var(--saffron)}
.wp.on .marker{transform:scale(1.08)}
.wp .learn{grid-column:2;grid-row:1}
.wp .built{grid-column:2;grid-row:2}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:22px 26px;margin:0 0 14px;max-width:820px}
.card .k{display:block;margin-bottom:8px}
.card h2{font-family:var(--disp);font-size:clamp(22px,2.8vw,28px);font-weight:600;letter-spacing:-.015em;line-height:1.15;margin:0 0 8px}
.card .why{font-size:15px;color:var(--ink-2);margin:0 0 14px}
.card .why b{color:var(--ink)}
.card ol{list-style:none;margin:0;padding:0;counter-reset:m}
.card li{counter-increment:m;display:grid;grid-template-columns:24px 1fr;gap:10px;padding:10px 0;border-top:1px solid var(--line);font-size:15px}
.card li::before{content:counter(m);grid-row:1/3;font-family:var(--mono);font-size:12px;width:22px;height:22px;border-radius:50%;display:grid;place-items:center;background:var(--saffron-soft);color:var(--saffron-deep);font-weight:500}
.card li b{display:block;font-weight:600}
.card li span{grid-column:2;color:var(--ink-2)}
.card .means{font-size:15px;color:var(--ink-2);margin:0 0 10px}
.card .shift{font-size:14.5px;color:var(--ink-2);margin:0 0 14px;border-left:3px solid var(--saffron);padding:2px 0 2px 12px}
.card .shift b{color:var(--ink)}
.card h4.sub{margin:14px 0 0;font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3);font-weight:500}
pre{font-family:var(--mono);font-size:12.5px;line-height:1.6;background:var(--sky);border:1px solid var(--line);border-radius:10px;padding:12px 14px;overflow-x:auto;white-space:pre-wrap;margin:12px 0 0;color:var(--ink)}
.copy{float:right;font-family:var(--mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;border:1px solid var(--saffron-deep);color:var(--saffron-deep);background:transparent;padding:3px 8px;border-radius:999px;cursor:pointer;margin:0 0 6px 10px}
.copy:hover,.copy:focus-visible{background:var(--saffron-deep);color:#fff;outline:none}
.no-js .copy{display:none}
.invite{margin:12px 0 0;font-size:14.5px;color:var(--ink-2);font-style:italic;border-top:1px solid var(--line);padding-top:10px}
.built{background:var(--pine);color:var(--pine-ink);border-color:var(--pine)}
.built .k{color:var(--pine-muted)}
.built h3{font-family:var(--disp);font-size:18px;font-weight:600;margin:0 0 8px;line-height:1.2}
.built p{margin:0 0 10px;font-size:15px;color:#D6E2DB;max-width:68ch}
.built .cairn{display:flex;gap:6px;margin:0 0 12px}
.built .cairn i{flex:1;height:8px;border-radius:2px;background:var(--pine-muted);opacity:.35}
.built .cairn i.on{opacity:1;background:var(--saffron)}
.built dl{margin:0;border-top:1px solid rgba(255,255,255,.18)}
.built dl div{display:grid;grid-template-columns:96px 1fr;gap:8px;padding:8px 0;border-bottom:1px solid rgba(255,255,255,.12);font-size:14px}
.built dt{font-family:var(--mono);font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--saffron-light);padding-top:3px}
.built dd{margin:0;color:var(--pine-ink)}
/* Links on the pine block: the global --saffron-deep is 2.2:1 here. Light text, saffron underline. */
.built a{color:var(--pine-ink);text-decoration:underline;text-decoration-color:var(--saffron);text-decoration-thickness:2px;text-underline-offset:3px}
.built a:hover{text-decoration-color:var(--saffron-light)}
.built a:focus-visible{outline-color:var(--saffron-light)}
.built svg{display:block;width:100%;max-width:420px;height:auto;margin:6px 0 12px}
.built svg rect{fill:none;stroke:var(--pine-muted);stroke-width:1}
.built svg .on rect{stroke:var(--saffron);stroke-width:1.5;fill:rgba(224,162,39,.15)}
.built svg text{fill:var(--pine-ink);font-family:var(--mono);font-size:8px}
.built svg .off text{fill:rgba(238,243,240,.4)}
.built svg .off rect{stroke:rgba(185,205,195,.35)}
.built svg path{fill:none;stroke:var(--pine-muted);stroke-width:1}
.built svg path.back{stroke:var(--saffron);stroke-dasharray:3 3}

/* ── summit + about + footer ── */
.summit{position:relative;padding:40px 0 72px;text-align:center}
.summit .flag{width:56px;height:56px;border-radius:50%;background:var(--saffron);margin:0 auto 18px;display:grid;place-items:center;font-family:var(--disp);font-weight:700;border:4px solid var(--sky)}
.summit h2{font-family:var(--disp);font-size:clamp(26px,4vw,40px);font-weight:700;letter-spacing:-.02em;margin:0 auto 12px;max-width:22ch;line-height:1.1}
.summit p{color:var(--ink-2);max-width:56ch;margin:0 auto 20px}
.about{border-top:1px solid var(--line);padding:56px 0}
.about .g{display:grid;grid-template-columns:1fr 2fr;gap:32px}
.about h2{font-family:var(--disp);font-size:24px;font-weight:600;margin:0}
.about p{margin:0 0 10px;color:var(--ink-2)}
footer{border-top:1px solid var(--line);padding:22px;font-family:var(--mono);font-size:12px;color:var(--ink-3);display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}

/* ── music corner ── */
.music{position:fixed;right:16px;bottom:16px;z-index:30;font-family:var(--mono);font-size:12px}
.music[hidden]{display:none}
.music__btn{display:flex;align-items:center;gap:10px;background:var(--ink);color:#fff;border:0;border-radius:999px;padding:10px 14px 10px 10px;cursor:pointer;box-shadow:0 8px 24px rgba(36,49,58,.25)}
.music__btn i{width:26px;height:26px;border-radius:50%;background:var(--saffron);display:grid;place-items:center;color:var(--ink);font-style:normal;font-size:11px}
.music__btn .t{max-width:160px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.music__panel{position:absolute;right:0;bottom:52px;width:min(320px,calc(100vw - 32px));background:var(--card);border:1px solid var(--line);border-radius:14px;padding:12px;box-shadow:0 16px 40px rgba(36,49,58,.2)}
.music__panel[hidden]{display:none}
.music__panel h4{margin:0 0 6px;font-family:var(--disp);font-size:14px;font-weight:600;color:var(--ink)}
.music__panel p{margin:0 0 8px;font-size:12px;color:var(--ink-2);font-family:var(--body)}
.music__list{list-style:none;margin:0;padding:0;max-height:220px;overflow:auto}
.music__list li{display:flex;justify-content:space-between;gap:8px;padding:7px 8px;border-radius:8px;cursor:pointer;color:var(--ink)}
.music__list li:hover,.music__list li.on{background:var(--saffron-soft)}
.music__list li span:last-child{color:var(--ink-3)}
.music__row{display:flex;gap:8px;align-items:center;margin-top:8px}
.music__row a{font-size:12px}
.music__row button{border:1px solid var(--line);background:#fff;border-radius:999px;padding:5px 10px;cursor:pointer;font-family:var(--mono);font-size:11px;color:var(--ink)}

/* ── responsive ── */
@media (max-width:860px){
  .trailhead .g,.about .g{grid-template-columns:1fr}
  .nav .ext{display:none}
  .trail::before,.trail__drawn{left:22px}
  .wp{grid-template-columns:44px minmax(0,1fr);column-gap:8px;margin-bottom:36px}
  .wp .marker{justify-self:start;margin-left:2px;width:40px;height:40px}
  .card{margin:0 0 12px;padding:20px 20px}
  .hero{min-height:min(78svh,640px)}
  /* Narrow screens: the lede wraps across the FULL width, into the right side where the desktop
     veil fades to 0 — 4.2% of its pixels failed at 375px (worst 2.43:1). Carry the wash across. */
  .hero__veil{background:
    linear-gradient(180deg,rgba(234,240,244,.10) 0%,rgba(234,240,244,0) 30%,rgba(234,240,244,.55) 72%,rgba(234,240,244,.96) 100%),
    linear-gradient(90deg,rgba(234,240,244,.55) 0%,rgba(234,240,244,.45) 55%,rgba(234,240,244,.50) 100%)}
  .hero__media video,.hero__media img{object-position:center 45%}
  .music{right:12px;bottom:12px}
  .music__btn .t{max-width:110px}
}

/* ── Waypoint layout: "Ridgeline" (chosen 2026-09-11 over Switchback and Field guide; see design/2026-09-layouts/) ──
   Full-width stage bands, ghost numerals, ridge dividers; built card sticks beside the lesson. The left trail line and markers are hidden here; trail.js still highlights the nav. */
.trail::before,.trail__drawn{display:none}
main.wrap{max-width:none;padding:0}
.trail{padding:0}
.wp{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);column-gap:32px;align-items:start;margin:0;padding:64px max(22px,calc((100vw - 1100px)/2)) 56px;position:relative;
  background:linear-gradient(180deg,var(--sky) 0%,var(--sky-2) 100%)}
.wp:nth-child(even){background:linear-gradient(180deg,var(--sky-2) 0%,var(--sky) 100%)}
.wp::before{content:counter(wpn);counter-increment:wpn;position:absolute;right:max(22px,calc((100vw - 1100px)/2));top:8px;font-family:var(--disp);font-weight:700;font-size:clamp(120px,18vw,220px);line-height:1;color:var(--ink);opacity:.06;pointer-events:none}
.trail{counter-reset:wpn}
.wp + .wp{border-top:0}
.wp + .wp::after{content:"";position:absolute;left:0;right:0;top:-1px;height:28px;background:
  linear-gradient(135deg,transparent 49%,var(--sky) 50%) 0 0/56px 28px repeat-x, linear-gradient(225deg,transparent 49%,var(--sky) 50%) 0 0/56px 28px repeat-x;pointer-events:none;opacity:.9}
.wp .marker{display:none}
.wp .learn{grid-column:1;grid-row:1;max-width:none;margin:0;background:transparent;border:0;padding:0}
.wp .built{grid-column:2;grid-row:1;max-width:none;margin:0;position:sticky;top:calc(var(--nav-h) + 24px)}
.card h2{font-size:clamp(26px,3.4vw,40px)}
.card .k{font-size:12px}
.wp .learn > .k::before{content:"◆ ";color:var(--saffron)}
.card ol{border-top:1px solid var(--line);margin-top:8px}
pre{background:#fff}
@media (max-width:860px){.wp{grid-template-columns:1fr;padding:44px 22px 40px}.wp .built{grid-column:1;grid-row:2;position:static;margin-top:16px}.wp::before{font-size:110px;top:4px}}