:root{
  --bg:#0b0d10;
  --panel:#12161b;
  --panel2:#171c22;
  --text:#f5f7f8;
  --muted:#a7b0b8;
  --line:#2a3139;
  --accent:#ff8a2b;
  --accent2:#ffb15f;
  --max:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,Helvetica,Arial,sans-serif;
  background:linear-gradient(180deg,#090b0e 0%,#0d1116 100%);
  color:var(--text);
  line-height:1.6;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:min(calc(100% - 40px),var(--max));margin:auto}
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(9,11,14,.78);
  backdrop-filter:blur(18px);
  border-bottom:1px solid rgba(255,255,255,.06)
}
.nav{height:74px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:12px;font-weight:760;letter-spacing:.2px}
.logo{
  width:36px;height:36px;border-radius:10px;
  background:
    radial-gradient(circle at 72% 30%,var(--accent2) 0 9%,transparent 10%),
    linear-gradient(135deg,var(--accent),#c74b00);
  box-shadow:0 10px 30px rgba(255,138,43,.18);
  position:relative;
}
.logo:before,.logo:after{
  content:"";position:absolute;left:8px;right:8px;border:2px solid #0b0d10;border-left-color:transparent;border-right-color:transparent;border-radius:50%;
}
.logo:before{top:10px;bottom:10px}
.logo:after{top:6px;bottom:6px;opacity:.72}
.nav-links{display:flex;gap:26px;align-items:center;color:#d6dbe0;font-size:.96rem}
.nav-links a:hover{color:white}
.cta{
  display:inline-flex;align-items:center;justify-content:center;
  padding:12px 18px;border-radius:999px;
  background:var(--accent);color:#111;font-weight:750;
  transition:.2s ease
}
.cta:hover{transform:translateY(-1px);filter:brightness(1.06)}
.hero{
  min-height:760px;display:grid;grid-template-columns:1.05fr .95fr;
  gap:70px;align-items:center;padding:90px 0 70px
}
.eyebrow{text-transform:uppercase;letter-spacing:.14em;font-size:.82rem;color:var(--accent2);font-weight:800}
h1{font-size:clamp(3rem,7vw,6.5rem);line-height:.94;margin:.18em 0 .28em;letter-spacing:-.055em}
h2{font-size:clamp(2rem,4vw,3.6rem);line-height:1.02;letter-spacing:-.04em;margin:.2em 0 .35em}
h3{font-size:1.25rem;margin:.2em 0 .5em}
.lead{font-size:clamp(1.15rem,2vw,1.45rem);color:var(--muted);max-width:760px}
.actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:30px}
.ghost{
  display:inline-flex;align-items:center;justify-content:center;
  padding:12px 18px;border-radius:999px;border:1px solid var(--line);color:#e8ebee
}
.hero-visual{display:flex;justify-content:center}
.watch{
  width:min(420px,88vw);aspect-ratio:.82;
  border-radius:30% / 18%;
  padding:18px;
  background:linear-gradient(145deg,#505862,#161a1f 42%,#6d747c 70%,#22272d);
  box-shadow:0 40px 100px rgba(0,0,0,.45), inset 0 0 0 1px rgba(255,255,255,.18);
  position:relative;transform:rotate(2deg)
}
.watch:before,.watch:after{
  content:"";position:absolute;background:#333941;border-radius:8px
}
.watch:before{width:16px;height:76px;right:-15px;top:28%}
.watch:after{width:11px;height:44px;right:-13px;top:48%}
.screen{
  width:100%;height:100%;border-radius:28% / 16%;
  background:
    radial-gradient(circle at 50% 10%,rgba(255,138,43,.2),transparent 28%),
    linear-gradient(180deg,#0a0c0e,#11161b);
  border:2px solid #0b0d10;
  padding:28px 24px;color:white;display:flex;flex-direction:column;justify-content:center;
  box-shadow:inset 0 0 0 2px rgba(255,255,255,.04)
}
.screen .app-title{font-size:1.6rem;font-weight:800;margin-bottom:6px}
.screen .app-sub{color:#aeb6bf;font-size:.93rem;margin-bottom:26px}
.screen-card{background:#171d23;border:1px solid #2a3139;border-radius:18px;padding:16px;margin:7px 0}
.screen-card strong{display:block;font-size:1.05rem}
.screen-card span{color:#9ea7af;font-size:.86rem}
.section{padding:92px 0}
.section.alt{background:#0f1318;border-top:1px solid rgba(255,255,255,.05);border-bottom:1px solid rgba(255,255,255,.05)}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:34px}
.card{background:linear-gradient(180deg,#14191f,#101419);border:1px solid var(--line);border-radius:22px;padding:28px}
.card p{color:var(--muted);margin-bottom:0}
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.badge{display:inline-block;border:1px solid #3b4651;border-radius:999px;padding:7px 11px;color:#cbd1d6;font-size:.82rem}
.footer{padding:40px 0 58px;color:#8f99a2;font-size:.92rem}
.footer-row{display:flex;justify-content:space-between;gap:28px;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:28px}
.footer-links{display:flex;gap:18px;flex-wrap:wrap}
.page-hero{padding:100px 0 48px}
.prose{max-width:850px}
.prose p,.prose li{color:#b8c0c7}
.prose ul{padding-left:20px}
.notice{border-left:3px solid var(--accent);background:#13181e;padding:18px 20px;border-radius:10px;margin:24px 0}
.small{font-size:.9rem;color:#8f99a2}
@media (max-width:850px){
  .nav-links{display:none}
  .hero{grid-template-columns:1fr;padding-top:60px}
  .hero-visual{order:-1}
  .grid-3,.split{grid-template-columns:1fr}
  h1{font-size:clamp(3rem,15vw,5.4rem)}
}

/* RadioBum v3 product-site additions */
.rb-hero{padding:86px 0 72px;overflow:hidden}
.rb-hero-grid{display:grid;grid-template-columns:1.02fr .98fr;align-items:center;gap:64px}
.rb-kicker{color:#ff9b43;text-transform:uppercase;letter-spacing:.15em;font-weight:800;font-size:.8rem}
.rb-title{font-size:clamp(3.6rem,7vw,7rem);line-height:.9;letter-spacing:-.065em;margin:.18em 0 .24em}
.rb-title span{color:#ff8a2b}
.rb-copy{font-size:clamp(1.08rem,1.8vw,1.35rem);color:#adb7c1;max-width:680px}
.device-stage{position:relative;min-height:570px;display:flex;align-items:center;justify-content:center}
.device-glow{position:absolute;width:430px;height:430px;border-radius:50%;background:radial-gradient(circle,rgba(255,120,35,.22),rgba(255,120,35,.03) 48%,transparent 70%);filter:blur(8px)}
.watch-shell{position:relative;width:min(390px,84vw);aspect-ratio:.82;border-radius:31%/19%;padding:16px;background:linear-gradient(145deg,#66717c,#171c21 38%,#7b838b 68%,#262c32);box-shadow:0 45px 100px rgba(0,0,0,.55),inset 0 0 0 1px rgba(255,255,255,.2);transform:rotate(3deg)}
.watch-shell:before{content:"";position:absolute;right:-17px;top:29%;width:18px;height:74px;border-radius:9px;background:#394149}
.watch-shell:after{content:"";position:absolute;right:-14px;top:50%;width:12px;height:44px;border-radius:6px;background:#333a41}
.watch-screen{width:100%;height:100%;border-radius:28%/17%;overflow:hidden;background:#000;border:2px solid #050607;position:relative}
.watch-screen img{width:100%;height:100%;object-fit:cover;object-position:center}
.feature-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:34px}
.feature-mini{border-top:1px solid #29343e;padding:18px 4px 0}
.feature-mini strong{display:block;margin-bottom:6px}
.feature-mini span{color:#98a4ae;font-size:.94rem}
.workflow{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:40px}
.flow-card{background:#0d1822;border:1px solid #22313d;border-radius:22px;padding:18px}
.flow-shot{aspect-ratio:.82;border-radius:18px;overflow:hidden;background:#000;margin-bottom:18px}
.flow-shot img{width:100%;height:100%;object-fit:cover}
.flow-num{color:#ff963d;font-weight:800;font-size:.8rem;letter-spacing:.12em}
.flow-card p{color:#9fabb5;margin-bottom:0}
.concept-panel{margin-top:38px;border:1px solid #23313c;border-radius:24px;overflow:hidden;background:#08121b}
.concept-panel img{width:100%;height:auto;display:block}
.concept-caption{padding:15px 20px;color:#8e9aa5;font-size:.88rem}
.topbar{position:sticky;top:0;z-index:80;background:rgba(7,16,24,.82);backdrop-filter:blur(18px);border-bottom:1px solid rgba(255,255,255,.06)}
.topbar-inner{height:72px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.rb-brand{font-weight:800;letter-spacing:.01em}
.rb-brand b{color:#ff8a2b}
.rb-nav{display:flex;align-items:center;gap:25px;color:#cbd2d8;font-size:.94rem}
.rb-nav a:hover{color:white}
@media(max-width:900px){
 .rb-hero-grid{grid-template-columns:1fr}
 .device-stage{order:-1;min-height:470px}
 .workflow,.feature-strip{grid-template-columns:1fr 1fr}
 .rb-nav a:not(.cta){display:none}
}
@media(max-width:560px){
 .workflow,.feature-strip{grid-template-columns:1fr}
 .device-stage{min-height:410px}
 .watch-shell{width:300px}
}

/* v3.1: standardized RadioBum header wordmark */
.topbar .brand{
  display:flex;
  align-items:center;
  gap:12px;
  color:#fff;
  font-weight:800;
  letter-spacing:0;
  text-decoration:none;
}
.topbar .brand span:last-child{color:#fff;}

/* v3.2 live demo */
.demo-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:60px;align-items:center}
.demo-device{display:flex;justify-content:center}
.demo-watch{width:min(360px,85vw);padding:15px;border-radius:30%/18%;
 background:linear-gradient(145deg,#65707a,#171c21 40%,#727b83 70%,#242a30);
 box-shadow:0 36px 90px rgba(0,0,0,.5),inset 0 0 0 1px rgba(255,255,255,.18)}
.demo-screen{overflow:hidden;border-radius:27%/16%;background:#000;border:2px solid #050607}
.demo-screen video{display:block;width:100%;height:auto;background:#000}
.demo-notes{color:#aab4bd}
.demo-badge{display:inline-flex;align-items:center;gap:8px;padding:7px 11px;border:1px solid #35424d;border-radius:999px;color:#cbd2d8;font-size:.84rem}
@media(max-width:850px){.demo-grid{grid-template-columns:1fr}.demo-device{order:-1}}