/*
Theme Name: JackLab Audio
Theme URI: https://jacklab.org
Author: JackLab Audio
Author URI: https://jacklab.org
Description: Independent Linux audio lab. A dark, documentation-style theme for practical Linux audio guides: signal-path cards, comparison matrices, command blocks, and routing diagrams. Inter + Geist Mono on deep slate with signal green and routing blue.
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.5
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: jacklab-audio
*/

:root{
  --primary:#0D1117;
  --secondary:#E6EDF3;
  --tertiary:#2FD17C;
  --accent:#58A6FF;
  --neutral:#7D8590;
  --surface:#161B22;
  --muted:#A5B1C2;
  --border:#30363D;
  --r-sm:6px; --r-md:12px; --r-lg:20px;
  --sp-xs:4px; --sp-sm:8px; --sp-md:16px; --sp-lg:32px; --sp-xl:72px;
  --sans:"Inter",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  --mono:"Geist Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --maxw:1140px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--primary);color:var(--secondary);
  font-family:var(--sans);font-size:16px;line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.mono{font-family:var(--mono);letter-spacing:.04em}
.eyebrow{
  font-family:var(--mono);font-size:.8125rem;font-weight:500;letter-spacing:.08em;
  text-transform:uppercase;color:var(--tertiary);
}
.skip-link{position:absolute;left:-9999px}
.skip-link:focus{left:8px;top:8px;background:var(--tertiary);color:var(--primary);padding:8px 12px;border-radius:var(--r-sm);z-index:50}

/* ---------- header ---------- */
header.site{
  position:sticky;top:0;z-index:20;
  background:rgba(13,17,23,.82);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
}
.nav{display:flex;align-items:center;gap:var(--sp-lg);min-height:64px}
.nav .brand{display:flex;align-items:center;margin-right:auto}
.nav .brand img{height:30px;width:auto;display:block}
.nav .brand .txt{font-weight:700;font-size:1.15rem;letter-spacing:-.02em;color:var(--secondary)}
.nav nav.menu{display:flex;gap:22px}
.nav nav.menu ul{list-style:none;display:flex;gap:22px;margin:0;padding:0}
.nav nav.menu a{color:var(--muted);font-size:.95rem;font-weight:500}
.nav nav.menu a:hover{color:var(--secondary);text-decoration:none}
.nav .cmd{
  font-family:var(--mono);font-size:.8125rem;color:var(--neutral);
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--r-sm);padding:6px 10px;white-space:nowrap;
}
.nav .cmd b{color:var(--tertiary);font-weight:500}

/* ---------- hero ---------- */
.hero{padding:var(--sp-xl) 0 56px;border-bottom:1px solid var(--border)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero h1{font-size:3rem;font-weight:700;line-height:1.05;letter-spacing:-.035em;margin:14px 0 18px}
.hero h1 .g{color:var(--tertiary)}
.hero p.lead{font-size:1.15rem;color:var(--muted);margin:0 0 28px;max-width:34ch}
.btns{display:flex;gap:var(--sp-md);flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;border-radius:var(--r-md);padding:12px 20px;font-weight:600;font-size:.97rem;border:1px solid transparent;cursor:pointer}
.btn-primary{background:var(--tertiary);color:var(--primary)}
.btn-primary:hover{background:var(--accent);text-decoration:none}
.btn-ghost{background:transparent;color:var(--secondary);border-color:var(--border)}
.btn-ghost:hover{border-color:var(--neutral);text-decoration:none}
.hero-meta{display:flex;gap:22px;margin-top:30px;color:var(--neutral);font-size:.85rem;flex-wrap:wrap}
.hero-meta span b{color:var(--secondary);font-weight:600}
.diagram{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);padding:22px;position:relative;overflow:hidden}
.diagram .cap{font-family:var(--mono);font-size:.75rem;color:var(--neutral);letter-spacing:.06em;text-transform:uppercase;margin-bottom:10px}
.diagram svg{width:100%;height:auto;display:block}

/* ---------- sections ---------- */
section{padding:var(--sp-xl) 0}
.sec-head{margin-bottom:36px;max-width:60ch}
.sec-head h2{font-size:1.875rem;font-weight:600;line-height:1.15;letter-spacing:-.02em;margin:10px 0 8px}
.sec-head p{color:var(--muted);margin:0}

.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--sp-md);counter-reset:s}
.step{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-md);padding:22px 20px;position:relative}
.step::before{counter-increment:s;content:"0" counter(s);font-family:var(--mono);font-size:.8rem;color:var(--tertiary);border:1px solid var(--border);border-radius:var(--r-sm);padding:3px 7px;display:inline-block;margin-bottom:12px}
.step h3{font-size:1.02rem;margin:0 0 6px}
.step p{margin:0;color:var(--neutral);font-size:.9rem}

.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--sp-md)}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-md);padding:24px;display:flex;flex-direction:column;gap:10px;transition:border-color .15s,transform .15s}
.card:hover{border-color:var(--neutral);transform:translateY(-2px);text-decoration:none}
.card .tags{display:flex;gap:8px;align-items:center}
.tag{font-family:var(--mono);font-size:.7rem;letter-spacing:.04em;border-radius:var(--r-sm);padding:3px 8px;border:1px solid var(--border);color:var(--neutral)}
.tag.beg{color:var(--tertiary);border-color:rgba(47,209,124,.35)}
.tag.int{color:var(--accent);border-color:rgba(88,166,255,.35)}
.card h3{font-size:1.1rem;margin:2px 0 0;color:var(--secondary)}
.card p{margin:0;color:var(--muted);font-size:.92rem;flex:1}
.card .go{font-family:var(--mono);font-size:.8rem;color:var(--accent)}

.split{display:grid;grid-template-columns:1fr 1fr;gap:var(--sp-md);align-items:stretch}
.panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-md);padding:24px}
.panel h3{margin:0 0 14px;font-size:1.15rem}
table.matrix{width:100%;border-collapse:collapse;font-size:.9rem}
table.matrix th,table.matrix td{text-align:left;padding:9px 10px;border-bottom:1px solid var(--border)}
table.matrix th{color:var(--neutral);font-family:var(--mono);font-size:.72rem;letter-spacing:.05em;text-transform:uppercase;font-weight:500}
table.matrix td:first-child{color:var(--secondary);font-weight:500}
.dot{display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:6px;vertical-align:middle}
.dot.g{background:var(--tertiary)} .dot.b{background:var(--accent)} .dot.n{background:var(--neutral)}
.codeblock{background:var(--primary);border:1px solid var(--border);border-radius:var(--r-sm);font-family:var(--mono);font-size:.82rem;line-height:1.7;color:var(--secondary);padding:16px 18px;overflow:auto}
.codeblock .c{color:var(--neutral)}
.codeblock .p{color:var(--tertiary)}
.codeblock .o{color:var(--muted)}

.labnote{background:var(--surface);border:1px solid var(--border);border-left:3px solid var(--accent);border-radius:var(--r-md);padding:20px 24px;color:var(--muted);font-size:.92rem}
.labnote b{color:var(--secondary)}

/* ---------- article / page content ---------- */
.doc-shell{padding:56px 0}
.doc-shell .wrap{max-width:820px}
.entry-eyebrow{margin-bottom:10px}
.entry-title{font-size:2.4rem;font-weight:700;line-height:1.1;letter-spacing:-.03em;margin:0 0 14px}
.entry-meta{color:var(--neutral);font-size:.85rem;font-family:var(--mono);margin-bottom:28px}
.entry-featured{border-radius:var(--r-md);border:1px solid var(--border);overflow:hidden;margin:0 0 32px}
.entry-featured img{display:block;width:100%}
.entry-content{font-size:1.05rem}
.entry-content h2{font-size:1.6rem;font-weight:650;letter-spacing:-.02em;margin:2em 0 .5em}
.entry-content h3{font-size:1.25rem;font-weight:600;margin:1.6em 0 .4em}
.entry-content p{margin:0 0 1.1em}
.entry-content a{color:var(--accent);text-decoration:underline}
.entry-content ul,.entry-content ol{margin:0 0 1.1em;padding-left:1.4em}
.entry-content li{margin:.3em 0}
.entry-content img{border-radius:var(--r-md);border:1px solid var(--border)}
.entry-content blockquote{margin:1.4em 0;background:var(--surface);border:1px solid var(--border);border-left:3px solid var(--accent);border-radius:var(--r-md);padding:16px 22px;color:var(--muted)}
.entry-content code{font-family:var(--mono);font-size:.88em;background:var(--surface);border:1px solid var(--border);border-radius:var(--r-sm);padding:2px 6px;color:var(--tertiary)}
.entry-content pre{background:var(--primary);border:1px solid var(--border);border-radius:var(--r-md);padding:16px 18px;overflow:auto}
.entry-content pre code{background:none;border:none;padding:0;color:var(--secondary)}
.entry-content table{width:100%;border-collapse:collapse;font-size:.95rem;margin:1.2em 0}
.entry-content th,.entry-content td{text-align:left;padding:9px 10px;border-bottom:1px solid var(--border)}
.entry-content th{color:var(--neutral);font-size:.8rem;text-transform:uppercase;letter-spacing:.04em}

/* posts list (index/archive) */
.post-list{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--sp-md)}
.post-list .card h3 a{color:var(--secondary)}
.archive-head{padding:56px 0 0}

.pagination{display:flex;gap:12px;margin-top:40px}
.pagination a,.pagination .current{border:1px solid var(--border);border-radius:var(--r-sm);padding:6px 12px;color:var(--muted);font-family:var(--mono);font-size:.85rem}
.pagination .current{color:var(--primary);background:var(--tertiary);border-color:var(--tertiary)}

/* ---------- footer ---------- */
footer.site{border-top:1px solid var(--border);padding:48px 0 56px;color:var(--neutral);font-size:.88rem}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:var(--sp-lg)}
footer.site .brand img{height:26px;margin-bottom:14px}
footer.site h4{color:var(--secondary);font-size:.8rem;font-family:var(--mono);letter-spacing:.06em;text-transform:uppercase;margin:0 0 12px}
footer.site ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px}
footer.site a{color:var(--muted)}
.disclaimer{margin-top:36px;padding-top:24px;border-top:1px solid var(--border);font-size:.8rem;line-height:1.7;max-width:90ch}

@media (max-width:880px){
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero h1{font-size:2.3rem}
  .steps{grid-template-columns:repeat(2,1fr)}
  .cards,.post-list{grid-template-columns:1fr}
  .split{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .nav nav.menu{display:none}
  .entry-title{font-size:1.9rem}
}