:root {
  --ink: #0b0d10;
  --panel: #11151a;
  --panel-2: #171c22;
  --paper: #f1ede4;
  --muted: #aaa79f;
  --line: #2b3139;
  --accent: #d8732a;
  --accent-soft: #f0a266;
  --max: 1180px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--ink);
  color: var(--paper);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
img { max-width: 100%; display: block; }
.container { width: min(calc(100% - 40px), var(--max)); margin-inline: auto; }
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: rgba(0,0,0,.96);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.nav { min-height: 86px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: flex; align-items: center; gap: 14px; text-decoration: none; min-width: 0; }
.brand-mark {
  width: 150px;
  height: 62px;
  object-fit: contain;
  object-position: center;
  border-radius: 0;
  flex: 0 0 auto;
}
.brand-text { font-size: .74rem; letter-spacing: .16em; text-transform: uppercase; color: var(--muted); white-space: nowrap; }
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { text-decoration: none; font-size: .9rem; color: #d8d4cc; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: white; }
.nav-cta { border: 1px solid rgba(216,115,42,.65); padding: 10px 16px; border-radius: 999px; }
.menu-btn { display:none; border:0; background:transparent; color:white; font-size:1.7rem; }

.hero { position: relative; min-height: 82vh; display: grid; align-items: center; overflow: hidden; border-bottom: 1px solid var(--line); }
.hero::before {
  content:""; position:absolute; inset:0;
  background:
    linear-gradient(90deg, rgba(11,13,16,.98) 0%, rgba(11,13,16,.88) 45%, rgba(11,13,16,.28) 78%, rgba(11,13,16,.82) 100%),
    url('assets/topdon-graphs.png') center/cover no-repeat;
  opacity:.8;
}
.hero::after {
  content:""; position:absolute; inset:0; pointer-events:none;
  background-image: linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(to right, rgba(0,0,0,.8), transparent 72%);
}
.hero-inner { position: relative; z-index:2; padding: 110px 0 90px; max-width: 790px; }
.eyebrow { display:flex; align-items:center; gap:12px; text-transform:uppercase; letter-spacing:.18em; font-size:.76rem; color:var(--accent-soft); font-weight:700; }
.eyebrow::before { content:""; width:44px; height:2px; background:var(--accent); }
h1 { margin:.55rem 0 1.1rem; font-size: clamp(3.2rem, 7vw, 6.8rem); line-height:.92; letter-spacing:-.055em; font-weight:800; }
.hero h1 span { display:block; color:#d9d4ca; font-weight:450; font-size:.68em; letter-spacing:-.035em; margin-top:.18em; }
.hero-sub { max-width: 730px; color:#c7c3bb; font-size: clamp(1rem, 1.7vw, 1.25rem); }
.signal { display:flex; align-items:center; gap:12px; margin:30px 0 34px; font-size:1.05rem; letter-spacing:.08em; text-transform:uppercase; font-weight:700; }
.signal i { display:block; width:42px; height:1px; background:var(--accent); }
.btn-row { display:flex; gap:14px; flex-wrap:wrap; }
.btn { display:inline-flex; align-items:center; justify-content:center; gap:10px; min-height:48px; padding:0 20px; border-radius:5px; text-decoration:none; font-weight:700; font-size:.92rem; border:1px solid var(--line); }
.btn-primary { background:var(--accent); color:#100c09; border-color:var(--accent); }
.btn-primary:hover { background:var(--accent-soft); }
.btn-ghost:hover { border-color:#686f79; background:#12161b; }

.cred { background:#0e1115; border-bottom:1px solid var(--line); }
.cred-grid { display:grid; grid-template-columns:repeat(4,1fr); }
.cred-item { padding:30px 24px; border-right:1px solid var(--line); }
.cred-item:first-child { border-left:1px solid var(--line); }
.cred strong { display:block; font-size:1.12rem; color:white; }
.cred span { display:block; color:var(--muted); font-size:.88rem; margin-top:3px; }

.section { padding: 96px 0; border-bottom:1px solid var(--line); }
.section-dark { background: var(--panel); }
.section-kicker { color:var(--accent-soft); text-transform:uppercase; letter-spacing:.18em; font-size:.74rem; font-weight:800; }
h2 { margin:.5rem 0 1rem; font-size:clamp(2.2rem,4.2vw,4.1rem); letter-spacing:-.04em; line-height:1; }
.lead { max-width:730px; color:#bab6ae; font-size:1.08rem; }
.split { display:grid; grid-template-columns:1.08fr .92fr; gap:72px; align-items:center; }
.video-frame { position:relative; aspect-ratio:16/9; overflow:hidden; background:#050607; border:1px solid #303640; box-shadow:0 22px 70px rgba(0,0,0,.28); }
.video-frame iframe { position:absolute; inset:0; width:100%; height:100%; border:0; }
.quote { margin:30px 0 0; padding:24px 0 0 26px; border-left:2px solid var(--accent); color:#ddd8cf; font-size:1.15rem; }

.cards { display:grid; grid-template-columns:repeat(3,1fr); gap:18px; margin-top:42px; }
.card { background:var(--panel); border:1px solid var(--line); padding:30px; min-height:290px; position:relative; overflow:hidden; }
.card::after { content:""; position:absolute; width:120px; height:120px; right:-60px; bottom:-60px; border:1px solid rgba(216,115,42,.25); transform:rotate(45deg); }
.card-num { color:var(--accent-soft); font-size:.76rem; letter-spacing:.18em; font-weight:800; }
.card h3 { font-size:1.45rem; margin:16px 0 6px; }
.path { color:white; font-weight:700; letter-spacing:.02em; margin-bottom:20px; }
.terms { color:var(--muted); font-size:.94rem; }

.media-band { display:grid; grid-template-columns: .78fr 1.22fr; min-height:520px; }
.media-img { background:url('assets/powerprobe.png') center 52%/cover no-repeat; min-height:420px; position:relative; }
.media-img::after { content:""; position:absolute; inset:0; background:linear-gradient(90deg, transparent 45%, #11151a 100%); }
.media-copy { background:#11151a; padding:70px max(40px, calc((100vw - var(--max))/2)); padding-left:70px; display:flex; flex-direction:column; justify-content:center; }
.media-meta { color:var(--muted); margin:10px 0 26px; }

.closing { text-align:center; padding:110px 0; background:radial-gradient(circle at 50% 100%, rgba(216,115,42,.11), transparent 46%); }
.closing h2 { max-width:850px; margin-inline:auto; }

.page-hero { padding:110px 0 72px; border-bottom:1px solid var(--line); background:linear-gradient(135deg,#11151a,#0b0d10 70%); }
.page-hero h1 { font-size:clamp(3rem,6.5vw,6rem); }
.page-hero p { max-width:760px; color:var(--muted); font-size:1.08rem; }
.video-grid { display:grid; grid-template-columns:repeat(2,1fr); gap:26px; margin-top:38px; }
.video-card { border:1px solid var(--line); background:var(--panel); overflow:hidden; }
.video-card .body { padding:24px; }
.video-card h3 { margin:0 0 8px; font-size:1.25rem; }
.video-card p { color:var(--muted); margin:0; }
.video-card.featured { grid-column:span 2; display:grid; grid-template-columns:1.35fr .65fr; }
.video-card.featured .video-frame { height:100%; }

.contact-layout { display:grid; grid-template-columns:.85fr 1.15fr; gap:70px; }
.contact-details { border-top:1px solid var(--line); margin-top:28px; }
.detail { padding:20px 0; border-bottom:1px solid var(--line); }
.detail small { display:block; color:var(--muted); text-transform:uppercase; letter-spacing:.15em; margin-bottom:5px; }
.detail a { text-decoration:none; font-size:1.12rem; }
.form { display:grid; gap:18px; }
.field label { display:block; margin-bottom:7px; color:#c8c4bc; font-size:.88rem; }
.field input,.field textarea { width:100%; background:#0f1317; border:1px solid #343b44; color:white; padding:14px 15px; font:inherit; border-radius:4px; }
.field input:focus,.field textarea:focus { outline:2px solid rgba(216,115,42,.3); border-color:var(--accent); }
.field textarea { min-height:160px; resize:vertical; }
.form-note { color:var(--muted); font-size:.82rem; }

footer { padding:34px 0; background:#080a0c; }
.footer-inner { display:flex; justify-content:space-between; align-items:center; gap:24px; color:#8f8c85; font-size:.85rem; }
.footer-links { display:flex; gap:18px; flex-wrap:wrap; }
.footer-links a { text-decoration:none; }

@media (max-width:900px) {
  .brand-text { display:none; }
  .menu-btn { display:block; }
  .nav-links { display:none; position:absolute; top:86px; left:0; right:0; background:#0b0d10; padding:22px 20px 28px; border-bottom:1px solid var(--line); flex-direction:column; align-items:flex-start; }
  .nav-links.open { display:flex; }
  .hero { min-height:auto; }
  .cred-grid { grid-template-columns:repeat(2,1fr); }
  .cred-item:nth-child(3) { border-left:1px solid var(--line); }
  .split,.contact-layout { grid-template-columns:1fr; gap:42px; }
  .cards { grid-template-columns:1fr; }
  .card { min-height:0; }
  .media-band { grid-template-columns:1fr; }
  .media-img::after { background:linear-gradient(180deg, transparent 45%, #11151a 100%); }
  .media-copy { padding:55px 30px 70px; }
  .video-card.featured { grid-template-columns:1fr; }
}
@media (max-width:620px) {
  .container { width:min(calc(100% - 28px), var(--max)); }
  .brand-mark { width:128px; height:54px; }
  .hero-inner { padding:78px 0 68px; }
  h1 { font-size:clamp(3rem,16vw,4.9rem); }
  .hero-sub { font-size:1rem; }
  .signal { font-size:.9rem; }
  .cred-grid { grid-template-columns:1fr 1fr; }
  .cred-item { padding:22px 14px; }
  .section { padding:72px 0; }
  .video-grid { grid-template-columns:1fr; }
  .video-card.featured { grid-column:span 1; }
  .footer-inner { align-items:flex-start; flex-direction:column; }
}