/* Shared styles for the guide pages (the-memory-wave-*.html). Tokens match index.html. */
:root{--ink:#020817;--night:#051030;--deep:#0a2160;--royal:#1c5fe6;--glow:#2f8cff;--cyan:#58d0ff;--ice:#cfe3ff;--mist:#e8f1ff;--cloud:#f3f7ff;--white:#fff;--gold:#f5b83d;--gold-deep:#c98f12;--text-dark:#0b1530;--text-soft:#43507a;--text-light:#d7e5ff;--text-light-soft:#9db6e8;--line:#d3e1fb;--sans:"Sora","Segoe UI",system-ui,sans-serif;--text-font:"Literata",Georgia,"Times New Roman",serif}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px;-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--text-font);font-size:1.0625rem;line-height:1.72;color:var(--text-dark);background:var(--cloud);-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:#1650c9;text-underline-offset:3px}
a:hover{color:#123fa8}
h1,h2,h3{font-family:var(--sans);font-weight:700;line-height:1.18;letter-spacing:-.02em;margin:0 0 .5em}
h2{font-size:clamp(1.5rem,3.4vw,2.1rem);color:var(--deep);margin-top:2.1em}
h3{font-size:clamp(1.1rem,2.2vw,1.3rem);color:var(--deep);margin-top:1.6em}
p{margin:0 0 1.1em}
ul,ol{margin:0 0 1.2em;padding-left:1.3em}
li{margin-bottom:.4em}
:focus-visible{outline:3px solid var(--gold);outline-offset:3px;border-radius:6px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip-link{position:absolute;left:12px;top:-60px;background:var(--gold);color:var(--ink);padding:10px 16px;border-radius:8px;font-weight:800;z-index:200;text-decoration:none}
.skip-link:focus{top:12px}
.wrap{width:min(1100px,100% - 32px);margin-inline:auto}

/* header */
.site-header{background:rgba(2,8,23,.96);border-bottom:1px solid rgba(207,227,255,.14);position:sticky;top:0;z-index:50}
.site-header .bar{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font:700 1.1rem/1.2 var(--sans)}
.brand:hover{color:#fff}
.brand svg{width:28px;height:28px;color:var(--gold);fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.nav-links{display:flex;gap:4px 18px;flex-wrap:wrap}
.nav-links a{color:#d7e5ff;text-decoration:none;font:700 .86rem/1.2 var(--sans);padding:10px 2px}
.nav-links a:hover,.nav-links a[aria-current=page]{color:var(--gold)}
.menu-btn{display:none;min-width:44px;min-height:44px;background:transparent;border:1px solid rgba(207,227,255,.35);color:#fff;border-radius:10px;font:700 .9rem var(--sans);cursor:pointer;padding:0 14px}
@media(max-width:900px){
  .js .menu-btn{display:inline-block}
  .js .nav-links{display:none;position:absolute;left:0;right:0;top:64px;background:#020817;flex-direction:column;padding:8px 20px 16px;border-bottom:1px solid rgba(207,227,255,.14)}
  .js .nav-links.open{display:flex}
  .js .nav-links a{padding:12px 0;font-size:1rem}
  .site-header{position:sticky}
  .site-header .wrap{position:relative}
}

/* hero */
.page-hero{background:radial-gradient(900px 420px at 85% -20%,rgba(47,140,255,.35),transparent 60%),radial-gradient(700px 400px at 0 110%,rgba(127,92,255,.2),transparent 65%),linear-gradient(180deg,var(--night),var(--ink));color:var(--text-light);padding:28px 0 64px}
.page-hero h1{font-size:clamp(1.9rem,5.2vw,3.2rem);color:#fff;max-width:20ch;margin:18px 0 14px}
.page-hero .lede{font-size:1.15rem;color:var(--text-light-soft);max-width:64ch;margin:0 0 18px}
.meta-row{display:flex;flex-wrap:wrap;gap:8px 18px;font:600 .85rem var(--sans);color:var(--text-light-soft)}
.meta-row b{color:#fff}
.breadcrumb ol{display:flex;flex-wrap:wrap;gap:4px;list-style:none;margin:0;padding:0;font:600 .82rem var(--sans)}
.breadcrumb li{margin:0;color:var(--text-light-soft)}
.breadcrumb li+li::before{content:"/";margin-right:6px;opacity:.6}
.breadcrumb a{color:var(--ice)}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:12px 26px;border-radius:999px;font:800 .98rem/1.2 var(--sans);text-decoration:none;border:2px solid transparent;cursor:pointer;text-align:center}
.btn-gold{background:linear-gradient(180deg,#ffd266,var(--gold));color:#1a1200}
.btn-gold:hover{color:#1a1200;filter:brightness(1.06)}
.btn-ghost{border-color:rgba(207,227,255,.5);color:#fff}
.btn-ghost:hover{color:var(--gold);border-color:var(--gold)}
.btn-royal{background:var(--royal);color:#fff}
.btn-royal:hover{background:#123fa8;color:#fff}

/* article */
.layout{display:grid;grid-template-columns:minmax(0,1fr);gap:32px;margin:-34px auto 56px}
.doc{background:#fff;border:1.5px solid var(--line);border-radius:24px;padding:clamp(20px,5vw,52px);box-shadow:0 18px 50px -24px rgba(18,48,130,.45);position:relative;min-width:0}
.doc>h2:first-of-type{margin-top:.2em}
.answer{background:linear-gradient(180deg,#f4f8ff,#eaf2ff);border:1.5px solid var(--line);border-left:6px solid var(--royal);border-radius:0 16px 16px 0;padding:18px 22px;margin:0 0 26px}
.answer b.k{display:block;font:800 .74rem var(--sans);letter-spacing:.08em;text-transform:uppercase;color:var(--royal);margin-bottom:6px}
.answer p{margin:0}
.toc{background:var(--cloud);border:1px solid var(--line);border-radius:14px;padding:16px 22px;margin:0 0 28px}
.toc strong{font:800 .95rem var(--sans);color:var(--deep)}
.toc ol{margin:8px 0 0;padding-left:1.2em;columns:2;column-gap:32px;font-size:.96rem}
.toc li{break-inside:avoid;margin-bottom:.25em}
@media(max-width:640px){.toc ol{columns:1}}
.note,.warn{border-radius:0 14px 14px 0;padding:14px 20px;margin:20px 0;border-left:5px solid var(--royal);background:#eef5ff;color:var(--deep)}
.warn{border-left-color:var(--gold-deep);background:#fff8e6;color:#4a3600}
.note p,.warn p{margin:0}
.note p+p,.warn p+p{margin-top:.7em}
.tag{display:inline-block;font:800 .7rem var(--sans);letter-spacing:.03em;padding:2px 9px;border-radius:999px;vertical-align:middle;margin-left:4px;white-space:nowrap}
.tag-vendor{background:#e8efff;color:#1b3f9e;border:1px solid #c5d6ff}
.tag-observed{background:#fff6dc;color:#7a5a06;border:1px solid #f1deaa}
.tag-editorial{background:#e7f8ef;color:#136a40;border:1px solid #bde8d1}
.tag-unverified{background:#fdecec;color:#8a1f1f;border:1px solid #f3c2c2}
.tag-research{background:#f0e9ff;color:#4b2aa8;border:1px solid #d8c8ff}
.table-wrap{overflow-x:auto;margin:16px 0 22px;border:1px solid var(--line);border-radius:12px;-webkit-overflow-scrolling:touch}
table{width:100%;border-collapse:collapse;font-size:.95rem;min-width:520px}
th,td{padding:11px 14px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}
th{background:var(--mist);color:var(--deep);font-family:var(--sans);font-size:.85rem}
tr:last-child td{border-bottom:0}
caption{caption-side:bottom;text-align:left;padding:8px 14px;font-size:.85rem;color:var(--text-soft)}
figure{margin:24px 0}
figcaption{font-size:.88rem;color:var(--text-soft);margin-top:8px}
figure img{border-radius:16px;border:1px solid var(--line)}
.faq details{border:1.5px solid var(--line);border-radius:14px;margin-bottom:10px;background:#fff}
.faq summary{cursor:pointer;list-style:none;padding:16px 48px 16px 18px;font:700 1rem/1.35 var(--sans);color:var(--deep);position:relative;min-height:48px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:18px;top:50%;transform:translateY(-50%);font-size:1.4rem;color:var(--royal)}
.faq details[open] summary::after{content:"\2212"}
.faq details>div{padding:0 18px 4px}
.cta-box{background:linear-gradient(180deg,var(--night),var(--ink));color:var(--text-light);border-radius:20px;padding:26px clamp(18px,4vw,34px);margin:34px 0 10px}
.cta-box h2,.cta-box h3{color:#fff;margin-top:0}
.cta-box p{color:var(--text-light-soft)}
.cta-box a:not(.btn){color:var(--ice)}
.cta-box .fine{font-size:.85rem;margin:12px 0 0}
.related{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;list-style:none;padding:0;margin:14px 0}
.related li{margin:0}
.related a{display:block;height:100%;padding:14px 16px;border:1.5px solid var(--line);border-radius:14px;text-decoration:none;font:700 .95rem/1.3 var(--sans);color:var(--deep);background:var(--cloud)}
.related a span{display:block;font:400 .85rem/1.45 var(--text-font);color:var(--text-soft);margin-top:4px}
.related a:hover{border-color:var(--royal)}
.sources li{font-size:.95rem}
.disclosure-line{font-size:.88rem;color:var(--text-soft);border-top:1px solid var(--line);margin-top:28px;padding-top:14px}

/* footer */
.site-footer{background:var(--ink);color:var(--text-light-soft);padding:44px 0 36px;font-size:.92rem}
.foot-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:28px}
.site-footer h2{font:800 .8rem var(--sans);letter-spacing:.08em;text-transform:uppercase;color:#fff;margin:0 0 10px}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin:0}
.site-footer a{color:var(--text-light-soft);text-decoration:none;display:inline-block;padding:6px 0}
.site-footer a:hover{color:var(--gold)}
.site-footer .legal{border-top:1px solid rgba(207,227,255,.14);margin-top:28px;padding-top:20px;font-size:.85rem}
.site-footer .legal p{margin:0 0 .8em;max-width:90ch}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
@media print{.site-header,.site-footer,.cta-box{display:none}.page-hero{background:none;color:#000;padding:0}.page-hero h1{color:#000}.doc{box-shadow:none;margin:0;border:0}}