/* AcousticPC — Quiet & Silent PC Building Guide
   Independent, vendor-neutral. Modern editorial "quiet-tech" theme.
   Charcoal + crimson on warm neutral. Custom CSS (no framework). */

:root{
  --ink:#161514;
  --ink-2:#2c2a28;
  --body:#43403c;
  --muted:#78736c;
  --line:#e6e1d8;
  --paper:#faf8f4;
  --paper-2:#f2eee6;
  --card:#ffffff;
  --crimson:#b8331f;
  --crimson-dk:#8f2616;
  --crimson-soft:#f6e7e2;
  --slate:#3d4a52;
  --radius:14px;
  --radius-sm:9px;
  --shadow:0 1px 2px rgba(22,21,20,.04),0 8px 28px rgba(22,21,20,.06);
  --shadow-lg:0 4px 12px rgba(22,21,20,.08),0 24px 60px rgba(22,21,20,.10);
  --maxw:1140px;
  --font-head:"Space Grotesk",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --font-body:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;font-family:var(--font-body);color:var(--body);
  background:var(--paper);line-height:1.68;font-size:17px;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--crimson);text-decoration:none}
a:hover{color:var(--crimson-dk);text-decoration:underline}
h1,h2,h3,h4{font-family:var(--font-head);color:var(--ink);line-height:1.18;letter-spacing:-.02em;font-weight:600;margin:0 0 .5em}
h1{font-size:clamp(2rem,4.6vw,3.15rem);font-weight:700}
h2{font-size:clamp(1.5rem,3vw,2.05rem);margin-top:2.2em}
h3{font-size:1.24rem;margin-top:1.6em;color:var(--ink-2)}
p{margin:0 0 1.1em}
strong{color:var(--ink-2);font-weight:600}
ul,ol{margin:0 0 1.2em;padding-left:1.3em}
li{margin:.4em 0}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}

/* ---- Skip / a11y ---- */
.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:#fff;padding:10px 16px;z-index:200}
.skip:focus{left:12px;top:12px}

/* ---- Header / nav ---- */
.site-head{position:sticky;top:0;z-index:100;background:rgba(250,248,244,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:16px;max-width:var(--maxw);margin:0 auto;padding:13px 22px}
.brand{display:flex;align-items:center;gap:11px;font-family:var(--font-head);font-weight:700;font-size:1.16rem;color:var(--ink);letter-spacing:-.02em}
.brand:hover{text-decoration:none;color:var(--ink)}
.brand .mark{width:34px;height:34px;flex:0 0 34px}
.brand small{display:block;font-family:var(--font-body);font-weight:500;font-size:.6rem;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);margin-top:2px}
.nav-links{display:flex;align-items:center;gap:5px;flex-wrap:wrap}
.nav-links a{color:var(--ink-2);font-weight:500;font-size:.93rem;padding:7px 11px;border-radius:8px;white-space:nowrap}
.nav-links a:hover{background:var(--paper-2);color:var(--crimson);text-decoration:none}
.nav-links a.cta{background:var(--ink);color:#fff}
.nav-links a.cta:hover{background:var(--crimson)}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:9px;padding:8px 10px;cursor:pointer;color:var(--ink)}
.nav-toggle svg{display:block}

/* ---- Hero ---- */
.hero{position:relative;overflow:hidden;background:var(--ink);color:#f4f1ec}
.hero.has-img{min-height:clamp(380px,52vw,540px);display:flex;align-items:flex-end}
.hero .hero-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.42}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(22,21,20,.15),rgba(22,21,20,.82))}
.hero .wrap{position:relative;z-index:2;padding-top:56px;padding-bottom:56px}
.hero h1{color:#fff;max-width:16ch}
.hero .lede{font-size:clamp(1.05rem,2.1vw,1.32rem);color:#e7e2da;max-width:60ch;margin-bottom:0}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-head);font-size:.72rem;font-weight:600;letter-spacing:.19em;text-transform:uppercase;color:var(--crimson);background:var(--crimson-soft);padding:6px 13px;border-radius:999px;margin-bottom:20px}
.hero .eyebrow{color:#ffd9cf;background:rgba(184,51,31,.28)}

/* page hero (no image) */
.page-hero{background:var(--paper-2);border-bottom:1px solid var(--line)}
.page-hero .wrap{padding:52px 22px 44px}
.page-hero .lede{font-size:1.16rem;color:var(--ink-2);max-width:66ch;margin-bottom:0}
.crumb{font-size:.82rem;color:var(--muted);margin-bottom:16px}
.crumb a{color:var(--muted)}.crumb a:hover{color:var(--crimson)}

/* ---- Layout ---- */
main{display:block}
.section{padding:56px 0}
.section.tight{padding:40px 0}
.article .wrap{max-width:820px}
.article img.figure{border-radius:var(--radius);box-shadow:var(--shadow);margin:1.6em 0}
.article figure{margin:1.8em 0}
.article figcaption{font-size:.86rem;color:var(--muted);margin-top:.6em;text-align:center}
.lead{font-size:1.18rem;color:var(--ink-2)}

/* ---- Cards / grid ---- */
.grid{display:grid;gap:22px}
.grid.cols-3{grid-template-columns:repeat(3,1fr)}
.grid.cols-2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);transition:transform .2s ease,box-shadow .2s ease}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.card h3{margin-top:0}
.card p{color:var(--body);margin-bottom:.4em;font-size:.97rem}
.card .card-link{font-family:var(--font-head);font-weight:600;font-size:.92rem;display:inline-flex;align-items:center;gap:6px;margin-top:8px}
.card a.card-link:hover{text-decoration:none}
.card .ico{width:42px;height:42px;border-radius:11px;display:grid;place-items:center;background:var(--crimson-soft);color:var(--crimson);margin-bottom:16px}
.card .ico svg{width:23px;height:23px}

/* stat chips */
.chips{display:flex;flex-wrap:wrap;gap:10px;margin:6px 0 4px;padding:0;list-style:none}
.chips li{font-family:var(--font-head);font-weight:600;font-size:.82rem;color:var(--slate);background:var(--paper-2);border:1px solid var(--line);border-radius:999px;padding:6px 14px;margin:0}
.chips li b{color:var(--crimson)}

/* callout / key box */
.note{background:var(--card);border:1px solid var(--line);border-left:4px solid var(--crimson);border-radius:var(--radius-sm);padding:20px 24px;margin:1.8em 0;box-shadow:var(--shadow)}
.note h3,.note h4{margin-top:0}
.note p:last-child{margin-bottom:0}

/* spec table */
.spec{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:.95rem;overflow:hidden;border-radius:var(--radius-sm);box-shadow:var(--shadow)}
.spec caption{caption-side:top;text-align:left;font-family:var(--font-head);font-weight:600;color:var(--ink);margin-bottom:.6em}
.spec th,.spec td{text-align:left;padding:12px 15px;border-bottom:1px solid var(--line);background:var(--card);vertical-align:top}
.spec thead th{background:var(--ink);color:#fff;font-family:var(--font-head);font-weight:600;font-size:.9rem}
.spec tbody tr:last-child td{border-bottom:none}
.spec td:first-child{font-weight:600;color:var(--ink-2);white-space:nowrap}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}

/* section band */
.band{background:var(--paper-2)}
.band-ink{background:var(--ink);color:#e7e2da}
.band-ink h2{color:#fff}
.band-ink .lede{color:#c9c3ba}

/* ---- Contact form ---- */
.form{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);max-width:620px}
.form label{display:block;font-weight:600;color:var(--ink-2);font-size:.92rem;margin:0 0 6px}
.form .row{margin-bottom:18px}
.form input,.form textarea,.form select{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:var(--radius-sm);font:inherit;color:var(--ink);background:var(--paper)}
.form input:focus,.form textarea:focus{outline:2px solid var(--crimson);outline-offset:1px;border-color:var(--crimson)}
.form textarea{min-height:130px;resize:vertical}
.btn{display:inline-block;font-family:var(--font-head);font-weight:600;background:var(--ink);color:#fff;border:none;border-radius:999px;padding:13px 28px;font-size:1rem;cursor:pointer;transition:background .18s ease,transform .18s ease}
.btn:hover{background:var(--crimson);color:#fff;text-decoration:none;transform:translateY(-2px)}

/* related links */
.related{border-top:1px solid var(--line);margin-top:48px;padding-top:32px}
.related h2{margin-top:0;font-size:1.35rem}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.related-grid a{display:block;background:var(--card);border:1px solid var(--line);border-radius:var(--radius-sm);padding:16px 18px;font-family:var(--font-head);font-weight:600;font-size:.95rem;color:var(--ink-2)}
.related-grid a:hover{border-color:var(--crimson);color:var(--crimson);text-decoration:none;box-shadow:var(--shadow)}

/* ---- Footer ---- */
.site-foot{background:var(--ink);color:#b8b2a9;margin-top:0;padding:52px 0 30px;font-size:.93rem}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:34px;margin-bottom:34px}
.site-foot h4{color:#fff;font-size:.82rem;letter-spacing:.14em;text-transform:uppercase;margin-bottom:14px}
.site-foot a{color:#c9c3ba}
.site-foot a:hover{color:#fff}
.site-foot ul{list-style:none;padding:0;margin:0}
.site-foot li{margin:.45em 0}
.foot-brand{display:flex;align-items:center;gap:11px;color:#fff;font-family:var(--font-head);font-weight:700;font-size:1.15rem;margin-bottom:12px}
.foot-brand .mark{width:32px;height:32px}
.foot-note{color:#8c867d;max-width:42ch;font-size:.9rem}
.foot-bottom{border-top:1px solid #322f2c;padding-top:22px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;color:#8c867d;font-size:.86rem}
.disclaimer{color:#8c867d;font-size:.82rem;max-width:70ch;margin-top:10px}

/* ---- entrance animation: CSS-only, ends visible (no JS gate) ---- */
@media (prefers-reduced-motion:no-preference){
  .rise{animation:rise .6s cubic-bezier(.22,.61,.36,1) both}
  .rise.d1{animation-delay:.06s}.rise.d2{animation-delay:.12s}.rise.d3{animation-delay:.18s}
}
@keyframes rise{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
/* Safeguard: never leave content hidden waiting on JS */
[data-aos]{opacity:1 !important;transform:none !important}

/* ---- Responsive ---- */
@media (max-width:900px){
  .grid.cols-3{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr}
  .related-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:680px){
  body{font-size:16px}
  .nav-links{position:fixed;inset:59px 0 auto 0;flex-direction:column;align-items:stretch;gap:2px;background:var(--paper);border-bottom:1px solid var(--line);padding:12px 18px 20px;box-shadow:var(--shadow-lg);display:none}
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 12px;font-size:1rem}
  .nav-toggle{display:inline-flex}
  .grid.cols-3,.grid.cols-2{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr;gap:26px}
  .related-grid{grid-template-columns:1fr}
  .section{padding:42px 0}
}