/* OBS Download Guide — dark navy theme mirroring obsproject.com. Self-contained, no external assets. */
*{box-sizing:border-box}
:root{
  --nav:#1a2b5e;         /* header band */
  --bg:#0f1b3d;          /* body dark navy */
  --panel:#152449;       /* diagonal lighter navy panel */
  --panel2:#1b2c56;
  --card:#17264c;
  --blue:#3b7bf5;        /* OS buttons */
  --blue-hi:#5b93ff;
  --green:#43b581;       /* contribute pill */
  --green-hi:#4fc793;
  --text:#eaf0ff;
  --muted:#cfd8ec;
  --dim:#9fb0d6;
  --line:#2a3c6e;
}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:"Segoe UI",system-ui,-apple-system,Roboto,Helvetica,Arial,sans-serif;
  line-height:1.6;font-size:16px;-webkit-font-smoothing:antialiased;
}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
a{color:var(--blue-hi);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{line-height:1.2;margin:0 0 .5em}
img,svg{max-width:100%}
.skip{position:absolute;left:-999px}
.skip:focus{left:8px;top:8px;background:var(--blue);color:#fff;padding:8px 12px;border-radius:6px;z-index:99}

/* ---- Header ---- */
.nav{background:var(--nav);position:sticky;top:0;z-index:50;border-bottom:1px solid #23366b}
.nav-inner{display:flex;align-items:center;gap:18px;min-height:64px}
.brand{display:flex;align-items:center;gap:11px;color:var(--text)}
.brand:hover{text-decoration:none}
.obs-logo{width:38px;height:38px;flex:0 0 auto}
.wordmark{display:flex;flex-direction:column;line-height:1.05}
.wordmark b{font-size:20px;letter-spacing:.5px}
.wordmark small{font-size:10.5px;color:var(--dim);letter-spacing:.3px;text-transform:uppercase}
.navlinks{display:flex;gap:20px;margin-left:auto;flex-wrap:wrap}
.navlinks a{color:var(--muted);font-size:15px;font-weight:500}
.navlinks a:hover{color:#fff;text-decoration:none}
.pill{background:var(--green);color:#08221a;font-weight:700;padding:8px 16px;border-radius:999px;font-size:14px}
.pill:hover{background:var(--green-hi);text-decoration:none}

/* ---- Buttons ---- */
.btn{display:inline-flex;align-items:center;gap:9px;justify-content:center;
  background:var(--blue);color:#fff;font-weight:600;padding:12px 20px;border-radius:8px;
  border:1px solid transparent;font-size:15px;transition:background .15s}
.btn:hover{background:var(--blue-hi);text-decoration:none}
.btn.big{padding:16px 26px;font-size:17px;border-radius:10px}
.btn.primary{box-shadow:0 6px 20px rgba(59,123,245,.35)}
.btn.ghost{background:transparent;border-color:var(--line);color:var(--muted)}
.btn.ghost:hover{background:var(--panel);color:#fff}
.btn svg{width:18px;height:18px}

/* ---- Hero ---- */
.hero{background:
    linear-gradient(135deg,rgba(59,123,245,.10) 0%,transparent 45%),
    linear-gradient(315deg,rgba(67,181,129,.07) 0%,transparent 40%),
    var(--bg);
  text-align:center;padding:64px 0 54px;border-bottom:1px solid var(--line)}
.hero h1{font-size:clamp(32px,6vw,52px);margin-bottom:12px;letter-spacing:-.5px}
.relline{color:var(--dim);font-size:15px;display:inline-flex;align-items:center;gap:9px;
  background:var(--panel);border:1px solid var(--line);padding:6px 14px;border-radius:999px;margin-bottom:22px}
.relline svg{width:15px;height:15px;opacity:.9}
.os-row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin:8px 0 20px}
.hero-tag{max-width:640px;margin:0 auto;color:var(--muted);font-size:17px}

/* ---- App preview ---- */
.preview{padding:36px 0}
.preview-frame{max-width:900px;margin:0 auto;border-radius:16px;overflow:hidden;
  border:1px solid var(--line);box-shadow:0 20px 60px rgba(0,0,0,.45);background:#0a1330}
.preview-frame svg{display:block;width:100%;height:auto}

/* ---- Sections / panels ---- */
.section{padding:52px 0}
.section.alt{background:linear-gradient(135deg,var(--panel) 0%,var(--panel2) 100%);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section h2{font-size:clamp(24px,4vw,32px);text-align:center}
.lead-center{text-align:center;max-width:720px;margin:0 auto 8px;color:var(--muted)}
.eyebrow{text-align:center;text-transform:uppercase;letter-spacing:1.4px;font-size:12.5px;color:var(--blue-hi);font-weight:700;margin-bottom:8px}

/* ---- Feature grid ---- */
.feat-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:30px}
.feat{display:flex;gap:16px;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px 22px}
.feat-ic{flex:0 0 auto;width:46px;height:46px;border-radius:10px;background:rgba(59,123,245,.14);
  display:flex;align-items:center;justify-content:center}
.feat-ic svg{width:24px;height:24px;stroke:var(--blue-hi)}
.feat h3{font-size:18px;margin-bottom:4px}
.feat p{margin:0;color:var(--muted);font-size:14.5px}

/* ---- Info block ---- */
.info{max-width:820px;margin:0 auto}
.info p{color:var(--muted)}
.chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px;justify-content:center}
.chip{background:var(--card);border:1px solid var(--line);border-radius:8px;padding:8px 14px;font-size:14px;color:var(--muted)}
.chip b{color:#fff}

/* ---- Download page specifics ---- */
.dl-hero{padding:52px 0 34px;text-align:center}
.dl-meta{display:flex;gap:22px;justify-content:center;flex-wrap:wrap;color:var(--dim);font-size:14.5px;margin:14px 0 26px}
.dl-meta b{color:var(--text)}
.spec-table{width:100%;border-collapse:collapse;margin:22px 0;background:var(--card);border-radius:10px;overflow:hidden}
.spec-table th,.spec-table td{text-align:left;padding:12px 16px;border-bottom:1px solid var(--line);font-size:15px}
.spec-table th{width:42%;color:var(--dim);font-weight:600}
.spec-table tr:last-child td,.spec-table tr:last-child th{border-bottom:0}
.steps{counter-reset:step;list-style:none;padding:0;margin:22px 0;max-width:760px}
.steps li{position:relative;padding:14px 16px 14px 58px;background:var(--card);border:1px solid var(--line);
  border-radius:10px;margin-bottom:12px;color:var(--muted)}
.steps li b{color:#fff}
.steps li::before{counter-increment:step;content:counter(step);position:absolute;left:14px;top:50%;
  transform:translateY(-50%);width:30px;height:30px;border-radius:8px;background:var(--blue);color:#fff;
  font-weight:700;display:flex;align-items:center;justify-content:center;font-size:15px}
.note{background:rgba(59,123,245,.10);border:1px solid var(--line);border-left:3px solid var(--blue);
  border-radius:8px;padding:14px 18px;color:var(--muted);margin:20px 0}
.note b,.note strong{color:#fff}

/* ---- FAQ ---- */
.faq{max-width:820px;margin:0 auto}
.faq details{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:2px 18px;margin-bottom:12px}
.faq summary{cursor:pointer;font-weight:600;padding:14px 0;font-size:16.5px;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:var(--blue-hi);font-weight:700;font-size:20px;line-height:1}
.faq details[open] summary::after{content:"\2212"}
.faq details p{margin:0 0 14px;color:var(--muted)}

/* ---- Breadcrumbs ---- */
.crumbs{padding:14px 0 0;font-size:13.5px;color:var(--dim)}
.crumbs a{color:var(--dim)}
.crumbs a:hover{color:#fff}

/* ---- Footer ---- */
.foot{background:#0b1530;border-top:1px solid var(--line);padding:34px 0;margin-top:20px}
.foot-row{display:flex;gap:22px;flex-wrap:wrap;margin-bottom:16px}
.foot-row a{color:var(--muted);font-size:14.5px}
.disc{color:var(--dim);font-size:13px;line-height:1.7;max-width:900px}
.disc a{color:var(--blue-hi)}

@media(max-width:720px){
  .feat-grid{grid-template-columns:1fr}
  .navlinks{display:none}
  .nav-inner{gap:12px}
  .brand{margin-right:auto}
  .spec-table th{width:50%}
}

/* news release list */
.newslist{list-style:none;padding:0;margin:18px 0}
.newslist li{padding:11px 0;border-bottom:1px solid var(--line);color:var(--muted)}
.newslist li b{color:#e6ecff}