/* ============================================================
   shared.css — the JamshriOS site shell (Option B shared asset)
   Palette, layout primitives, top nav, hero base, footer,
   scroll-progress thread + reveal-on-scroll. Linked by every page.
   Page-specific component styles stay inline in each page.
   ============================================================ */

:root{
  --tile:#0B5E5D; --tile-deep:#08201F; --ground:#061614;
  --teal:#0E7C7B; --teal-bright:#2BBFAE; --aqua:#52E0C4; --aqua-soft:#7EECD6; --aqua-pale:#A6F2E3;
  --gold:#D9B04A; --gold-soft:#E8C66A; --gold-pale:#F2DA94; --ink:#E8F4F1; --muted:#8AA8A4; --muted-dim:#5F7B78;
  --line:rgba(82,224,196,.16); --line-gold:rgba(217,176,74,.24); --card:rgba(255,255,255,.025);
  --serif:Georgia,'Times New Roman',serif;
  --sans:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--ground);color:var(--ink);font-family:var(--sans);line-height:1.7;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;padding-top:52px}
::selection{background:var(--gold);color:var(--tile-deep)}
a{text-decoration:none;color:inherit}

/* layout primitives */
.wrap{max-width:760px;margin:0 auto;padding:0 28px}
.wide{max-width:1040px;margin:0 auto;padding:0 28px}
section{padding:84px 0;border-bottom:1px solid var(--line)}
.eyebrow{font-size:12px;letter-spacing:4px;text-transform:uppercase;color:var(--gold-soft);font-weight:600;margin-bottom:18px}
.eyebrow.a{color:var(--aqua)}
h1{font-family:var(--serif);font-weight:400;font-size:clamp(42px,7.4vw,88px);line-height:1.02;letter-spacing:-2px}
h2{font-family:var(--serif);font-weight:400;font-size:clamp(30px,4.6vw,50px);line-height:1.08;letter-spacing:-1px;margin-bottom:22px}
h3{font-family:var(--serif);font-weight:400;font-size:25px;letter-spacing:-.3px;margin-bottom:10px}
p{color:var(--muted);font-size:17px;margin-bottom:18px}
p.lead{font-size:clamp(19px,2.3vw,24px);color:var(--ink);font-weight:300;line-height:1.5}
.gold{color:var(--gold-soft)} .accent{color:var(--aqua)}
em{color:var(--gold-pale);font-style:italic}

/* top nav */
.topnav{position:fixed;top:0;left:0;right:0;z-index:50;display:flex;align-items:center;justify-content:center;gap:6px;
  padding:11px 20px;background:rgba(6,22,20,.82);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.topnav a{font-size:13px;letter-spacing:1.5px;text-transform:uppercase;color:var(--muted);
  padding:8px 14px;border-radius:100px;transition:.2s;white-space:nowrap}
.topnav a:hover{color:var(--ink);background:rgba(255,255,255,.04)}
.topnav a.active{color:var(--gold-soft);background:rgba(217,176,74,.1);border:1px solid rgba(217,176,74,.32)}
.topnav .nbrand{font-family:var(--serif);font-size:15px;color:var(--ink);text-transform:none;margin-right:10px}
.topnav .nbrand b{color:var(--aqua)}
@media(max-width:920px){.topnav{justify-content:flex-start;flex-wrap:nowrap;overflow-x:auto;gap:3px;padding:9px 12px;-webkit-overflow-scrolling:touch;scrollbar-width:none}.topnav::-webkit-scrollbar{display:none}.topnav a{font-size:12px;letter-spacing:.5px;padding:8px 12px;flex:0 0 auto}.topnav .nbrand{display:none}}

/* hero base (background gradient is set per-page on .hero-bg) */
.hero{padding:104px 0 78px;position:relative;overflow:hidden;border-bottom:1px solid var(--line);text-align:center}
.hero-bg{position:absolute;inset:0;z-index:0}
.hero .wrap{position:relative;z-index:1}
.hero .thread{font-family:var(--serif);font-style:italic;color:var(--gold-soft);font-size:20px;margin-bottom:24px;letter-spacing:.3px}
.hero h1 .o{color:var(--aqua)}
.hero p.lead{margin:28px auto 0;max-width:50ch}
.hero p.lead b{color:var(--gold-pale);font-weight:400}
.tag{display:inline-block;margin-top:30px;font-size:12px;letter-spacing:4px;text-transform:uppercase;
  color:var(--muted-dim);border:1px solid var(--line-gold);padding:9px 16px;border-radius:100px}

/* closing */
.closing{text-align:center}
.closing .big{font-family:var(--serif);font-style:italic;font-size:clamp(26px,4vw,40px);color:var(--ink);line-height:1.3;max-width:20ch;margin:0 auto}

/* footer */
footer{padding:64px 0 70px;text-align:center}
footer .pwr{display:flex;flex-direction:column;align-items:center;gap:9px;margin-bottom:22px}
footer .pwr img{height:74px;width:auto;filter:drop-shadow(0 4px 18px rgba(0,0,0,.4))}
footer .pwr .pl{font-size:10.5px;letter-spacing:4px;text-transform:uppercase;color:var(--muted-dim)}
footer p{font-size:13px;color:var(--muted-dim);margin:0 auto}
footer a{color:var(--muted)}

@media(max-width:820px){section{padding:62px 0}}

/* ====== scroll: reveal-on-enter + progress thread ====== */
.progress{position:fixed;top:0;left:0;width:100%;height:2px;transform:scaleX(0);transform-origin:0 50%;z-index:60;
  background:linear-gradient(90deg,var(--teal-bright),var(--aqua) 55%,var(--aqua-pale));
  box-shadow:0 0 8px rgba(82,224,196,.45);pointer-events:none;will-change:transform}
body.reveal-on .reveal{opacity:0;transform:translateY(18px);transition:opacity .7s cubic-bezier(.2,.6,.2,1),transform .7s cubic-bezier(.2,.6,.2,1)}
body.reveal-on .reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){body.reveal-on .reveal{opacity:1;transform:none;transition:none}}

/* one thread weaving the page */
body::before{content:"";position:fixed;left:22px;top:62px;bottom:18px;width:2px;border-radius:2px;
  background:linear-gradient(180deg,var(--aqua),var(--teal) 50%,var(--gold-soft));opacity:.16;z-index:1;pointer-events:none}
body::after{content:"";position:fixed;left:17px;width:12px;height:12px;border-radius:50%;
  background:radial-gradient(circle,var(--aqua-soft),rgba(82,224,196,0) 70%);box-shadow:0 0 12px var(--aqua);
  z-index:1;pointer-events:none;animation:threadrun 7s ease-in-out infinite}
@keyframes threadrun{0%{top:58px;opacity:0}12%{opacity:.9}88%{opacity:.9}100%{top:calc(100vh - 30px);opacity:0}}
@media(max-width:760px){body::before,body::after{display:none}}
@media(prefers-reduced-motion:reduce){body::after{display:none}}