/* ============================================================
   NULLPORT — instrument-grade storefront
   ============================================================ */
:root{
  --bg:#0E1116; --surface:#161B22; --surface-2:#1C222B;
  --line:#2A313C; --text:#E6EDF3; --muted:#8B949E; --faint:#5A6472;
  --accent:#4C8DFF; --accent-dim:rgba(76,141,255,.14);
  --radius:6px;
  --wrap:1220px;
  --mono:'JetBrains Mono',ui-monospace,monospace;
  --sans:'Space Grotesk',system-ui,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);color:var(--text);
  font-family:var(--sans);font-size:16px;line-height:1.55;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
button{font-family:inherit;cursor:pointer}

.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px;width:100%}
.mono{font-family:var(--mono)}
.muted{color:var(--muted)}
.visually-hidden,.skip-link{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.skip-link:focus{position:fixed;top:8px;left:8px;width:auto;height:auto;clip:auto;background:var(--accent);color:#06101f;padding:8px 14px;border-radius:var(--radius);z-index:200}

/* focus ring */
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:3px}

.eyebrow{
  font-family:var(--mono);font-size:11.5px;letter-spacing:.16em;
  color:var(--accent);text-transform:uppercase;margin-bottom:14px;
}

/* ---------- buttons ---------- */
.btn{
  font-family:var(--mono);font-size:13px;letter-spacing:.03em;
  border:1px solid var(--line);background:var(--surface-2);color:var(--text);
  padding:12px 20px;border-radius:var(--radius);transition:background .18s,border-color .18s,color .18s,transform .1s;
}
.btn:hover{border-color:var(--faint)}
.btn:active{transform:translateY(1px)}
.btn--accent{background:var(--accent);border-color:var(--accent);color:#06101f;font-weight:600}
.btn--accent:hover{background:#649bff;border-color:#649bff}
.btn--ghost{background:transparent}
.btn--ghost:hover{background:var(--surface)}
.btn--sm{padding:8px 14px;font-size:12px}
.btn--block{width:100%;justify-content:center}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:90;background:rgba(14,17,22,.82);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav__inner{display:flex;align-items:center;gap:24px;height:62px}
.brand{display:flex;align-items:center;gap:9px;color:var(--text)}
.brand__mark{color:var(--accent)}
.brand__word{font-weight:700;letter-spacing:.14em;font-size:15px}
.nav__links{display:none;gap:26px;margin-left:14px;font-size:14px;color:var(--muted)}
.nav__links a{transition:color .16s}
.nav__links a:hover{color:var(--text)}
.nav__actions{display:flex;align-items:center;gap:6px;margin-left:auto}
.icon-btn{display:grid;place-items:center;width:38px;height:38px;background:transparent;border:1px solid transparent;border-radius:var(--radius);color:var(--text);transition:background .16s,border-color .16s}
.icon-btn:hover{background:var(--surface);border-color:var(--line)}
.cart-btn{position:relative}
.cart-count{position:absolute;top:2px;right:2px;background:var(--accent);color:#06101f;font-family:var(--mono);font-size:10px;font-weight:600;min-width:16px;height:16px;border-radius:8px;display:grid;place-items:center;padding:0 4px}
.hamburger{display:grid}
.nav__mobile{display:flex;flex-direction:column;border-top:1px solid var(--line);background:var(--surface)}
.nav__mobile[hidden]{display:none}
.nav__mobile a{padding:14px 24px;border-bottom:1px solid var(--line);font-size:15px;color:var(--muted)}
.nav__mobile a:hover{color:var(--text);background:var(--surface-2)}

/* ---------- hero ---------- */
.hero{border-bottom:1px solid var(--line);position:relative}
.hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:60px 60px;opacity:.14;pointer-events:none;mask-image:radial-gradient(ellipse 80% 70% at 60% 30%,#000 30%,transparent 75%)}
.hero__grid{display:grid;grid-template-columns:1fr;gap:36px;align-items:center;padding:52px 24px 60px;position:relative}
.hero__stage{order:-1;max-width:360px}
.hero__title{font-size:clamp(2.4rem,5vw,3.9rem);line-height:1.02;letter-spacing:-.02em;font-weight:600;margin-bottom:22px}
.hero__lede{color:var(--muted);font-size:17px;max-width:44ch;margin-bottom:30px}
.readout{display:flex;align-items:center;gap:16px;border:1px solid var(--line);background:var(--surface);border-radius:var(--radius);padding:14px 18px;width:fit-content;max-width:100%;flex-wrap:wrap;margin-bottom:30px}
.readout__item{display:flex;flex-direction:column;gap:2px}
.readout__k{font-family:var(--mono);font-size:10px;letter-spacing:.14em;color:var(--faint)}
.readout__v{font-family:var(--mono);font-size:19px;font-weight:600;color:var(--text)}
.readout__sep{width:1px;height:30px;background:var(--line)}
.hero__cta{display:flex;gap:12px;flex-wrap:wrap}

/* stage / product placeholder */
.stage-panel{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:8px;aspect-ratio:1/1;display:grid;place-items:center;overflow:hidden}
.stage-svg{width:100%;height:100%}
.stage-ref{position:absolute;top:14px;left:16px;font-family:var(--mono);font-size:11px;letter-spacing:.14em;color:var(--faint)}
.stage-dim{position:absolute;bottom:52px;left:50%;transform:translateX(-50%);font-family:var(--mono);font-size:11px;color:var(--faint)}

/* ---------- spec strip ---------- */
.spec-strip{background:var(--surface);border-bottom:1px solid var(--line);overflow:hidden}
.spec-strip__track{display:flex;align-items:center;gap:22px;white-space:nowrap;font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:var(--muted);padding:13px 0;animation:marquee 34s linear infinite;width:max-content}
.spec-strip__track .dot{color:var(--accent)}
@keyframes marquee{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* ---------- sections ---------- */
.section{padding:56px 0;border-bottom:1px solid var(--line)}
.section--alt{background:var(--surface)}
.section__head{margin-bottom:44px;max-width:60ch}
.section__title{font-size:clamp(1.7rem,3.2vw,2.5rem);letter-spacing:-.015em;font-weight:600;line-height:1.08}
.section__sub{color:var(--muted);margin-top:12px;font-size:16px}

/* ---------- product grid ---------- */
.grid{display:grid;grid-template-columns:1fr;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:8px;overflow:hidden}
.card{background:var(--bg);padding:20px;display:flex;flex-direction:column;transition:background .18s}
.card:hover{background:var(--surface)}
.card__media{position:relative;background:var(--surface-2);border:1px solid var(--line);border-radius:var(--radius);aspect-ratio:4/3;margin-bottom:16px;overflow:hidden}
.card:hover .card__media{border-color:var(--faint)}
.card__pn{position:absolute;top:9px;left:10px;font-family:var(--mono);font-size:10px;letter-spacing:.12em;color:var(--faint);z-index:2}
.card__cat{position:absolute;top:9px;right:10px;font-family:var(--mono);font-size:10px;letter-spacing:.1em;color:var(--accent);z-index:2}
.card__svg{width:100%;height:100%}
.card__name{font-size:16px;font-weight:600;letter-spacing:-.01em}
.card__chips{display:flex;flex-wrap:wrap;gap:6px;margin:10px 0 14px}
.chip{font-family:var(--mono);font-size:10.5px;letter-spacing:.04em;color:var(--muted);border:1px solid var(--line);border-radius:4px;padding:3px 7px;background:var(--surface)}
.card__foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:8px}
.card__price{font-family:var(--mono);font-size:16px;font-weight:600}
.card__btns{display:flex;gap:6px}
.card__btns .btn{padding:7px 10px;font-size:11.5px}

/* ---------- comparison ---------- */
.compare-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:8px;-webkit-overflow-scrolling:touch}
.compare{border-collapse:collapse;width:100%;min-width:640px;font-size:14px}
.compare th,.compare td{text-align:left;padding:14px 18px;border-bottom:1px solid var(--line);border-right:1px solid var(--line)}
.compare tr:last-child th,.compare tr:last-child td{border-bottom:none}
.compare th:last-child,.compare td:last-child{border-right:none}
.compare__rowhead,.compare tbody th{font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-weight:500;background:var(--bg)}
.compare thead th{background:var(--surface-2);vertical-align:bottom}
.compare__col{width:22%}
.compare__col--rec{background:var(--accent-dim);border-top:2px solid var(--accent)}
.compare__pn{display:block;font-family:var(--mono);font-size:12px;color:var(--faint)}
.compare__name{display:block;font-size:17px;font-weight:600;margin-top:2px}
.tag{display:inline-block;font-family:var(--mono);font-size:9.5px;letter-spacing:.1em;padding:3px 7px;border-radius:4px;margin-top:8px}
.tag--rec{background:var(--accent);color:#06101f;font-weight:600}
.compare tbody td{font-family:var(--mono);font-size:13.5px;color:var(--text)}
.compare td.best{color:var(--accent);position:relative}
.compare td.best::before{content:"▸ ";color:var(--accent)}
.compare .price-cell{font-weight:600}
.compare__action td{padding:16px 18px}
.compare__col--rec + .compare__col{border-left:none}

/* ---------- feature band ---------- */
.feature__grid{display:grid;grid-template-columns:1fr;gap:36px;align-items:center}
.feature__text{color:var(--muted);margin:16px 0 24px;font-size:16px;max-width:46ch}
.feature__list{list-style:none;display:flex;flex-direction:column;gap:10px}
.feature__list li{display:flex;align-items:baseline;gap:12px;font-size:15px}
.feature__list .mono{color:var(--accent);font-size:12px}
.feature__diagram{background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:24px}
.d-label{font-family:var(--mono);font-size:9px;letter-spacing:.1em;fill:var(--faint)}
.d-node{font-family:var(--mono);font-size:11px;letter-spacing:.06em;fill:var(--muted)}
.d-node--accent{fill:var(--accent)}
.diagram text{text-transform:uppercase}

/* ---------- signup ---------- */
.signup__inner{display:grid;grid-template-columns:1fr;gap:22px;align-items:center}
.signup__form{display:flex;gap:10px;flex-wrap:wrap}
.signup__form input{font-family:var(--mono);font-size:14px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);color:var(--text);padding:12px 16px;min-width:0;flex:1}
.signup__form input::placeholder{color:var(--faint)}
.signup__form input:focus{border-color:var(--accent);outline:none}

/* ---------- footer ---------- */
.footer{padding:60px 0 28px;background:var(--bg)}
.footer__grid{display:grid;grid-template-columns:1fr 1fr;gap:32px;padding-bottom:40px;border-bottom:1px solid var(--line)}
.footer__brand{grid-column:1/-1}
.footer__tag{color:var(--muted);font-size:14px;margin:14px 0 10px;max-width:32ch}
.footer__ref{color:var(--faint);font-size:11px;letter-spacing:.1em}
.footer__col h3{font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--faint);margin-bottom:14px;font-weight:500}
.footer__col a{display:block;color:var(--muted);font-size:14px;padding:5px 0;transition:color .15s}
.footer__col a:hover{color:var(--text)}
.footer__bar{display:flex;align-items:center;justify-content:space-between;padding-top:22px;gap:16px;flex-wrap:wrap}
.footer__bar .mono{font-size:11px;letter-spacing:.08em;color:var(--faint)}
.pay{display:flex;gap:6px;flex-wrap:wrap}
.pay__chip{font-family:var(--mono);font-size:10px;letter-spacing:.06em;color:var(--muted);border:1px solid var(--line);border-radius:4px;padding:4px 8px}

/* ---------- overlay ---------- */
.overlay{position:fixed;inset:0;background:rgba(6,9,13,.66);backdrop-filter:blur(2px);z-index:100;opacity:0;transition:opacity .22s}
.overlay.is-open{opacity:1}

/* ---------- drawer ---------- */
.drawer{position:fixed;top:0;right:0;height:100%;width:min(400px,90vw);background:var(--surface);border-left:1px solid var(--line);z-index:110;transform:translateX(100%);transition:transform .28s cubic-bezier(.4,0,.2,1);display:flex;flex-direction:column}
.drawer.is-open{transform:translateX(0)}
.drawer__head{display:flex;align-items:center;justify-content:space-between;padding:20px 22px;border-bottom:1px solid var(--line)}
.drawer__title{font-size:16px;font-weight:600;letter-spacing:.02em}
.drawer__title .mono{color:var(--muted);font-size:13px}
.drawer__body{flex:1;overflow-y:auto;padding:8px 22px}
.cart-item{display:grid;grid-template-columns:56px 1fr;gap:14px;padding:18px 0;border-bottom:1px solid var(--line)}
.cart-item__thumb{width:56px;height:56px;background:var(--surface-2);border:1px solid var(--line);border-radius:var(--radius);display:grid;place-items:center}
.cart-item__pn{font-family:var(--mono);font-size:10px;letter-spacing:.1em;color:var(--faint)}
.cart-item__name{font-size:14px;font-weight:600;margin:2px 0 8px}
.cart-item__row{display:flex;align-items:center;justify-content:space-between}
.stepper{display:inline-flex;align-items:center;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.stepper button{width:26px;height:26px;background:var(--surface-2);border:none;color:var(--text);font-family:var(--mono);display:grid;place-items:center}
.stepper button:hover{background:var(--line)}
.stepper span{width:30px;text-align:center;font-family:var(--mono);font-size:13px}
.cart-item__price{font-family:var(--mono);font-size:14px;font-weight:600}
.drawer__foot{border-top:1px solid var(--line);padding:20px 22px}
.drawer__row{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}
.drawer__row .mono{font-size:14px}
.drawer__row--faint .mono{font-size:10px;letter-spacing:.08em;color:var(--faint)}
#cartSubtotal{font-size:18px;font-weight:600}
.drawer__note{font-size:10px;letter-spacing:.08em;color:var(--faint);text-align:center;margin-top:12px}

/* ---------- modal ---------- */
.modal{position:fixed;inset:0;z-index:120;display:none;place-items:center;padding:24px}
.modal.is-open{display:grid}
.modal__panel{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:8px;width:min(760px,100%);max-height:90vh;overflow-y:auto}
.modal__close{position:absolute;top:14px;right:14px;z-index:2;background:var(--surface-2);border:1px solid var(--line)}
.modal__grid{display:grid;grid-template-columns:1fr;gap:0}
.modal__media{background:var(--surface-2);border-right:none;border-bottom:1px solid var(--line);padding:24px;display:grid;place-items:center;position:relative}
.modal__info{padding:30px 28px}
.modal__info .eyebrow{margin-bottom:10px}
.modal__info h3{font-size:22px;font-weight:600;letter-spacing:-.01em}
.modal__price{font-family:var(--mono);font-size:20px;font-weight:600;margin:8px 0 18px}
.spec-table{width:100%;border-collapse:collapse;margin-bottom:20px}
.spec-table th,.spec-table td{text-align:left;padding:9px 0;border-bottom:1px solid var(--line);font-family:var(--mono);font-size:12.5px}
.spec-table th{color:var(--faint);font-weight:400;letter-spacing:.05em;text-transform:uppercase;width:44%}
.spec-table td{color:var(--text)}
.modal__buy{display:flex;gap:10px;align-items:center;flex-wrap:wrap}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.reveal.is-in{opacity:1;transform:none}

/* ============ responsive ============ */
@media(min-width:561px){
  .grid{grid-template-columns:repeat(2,1fr)}
  .footer__grid{grid-template-columns:1fr 1fr 1fr}
  .section{padding:78px 0}
  .signup__form input{min-width:260px;flex:0 1 auto}
}
@media(min-width:821px){
  .nav__links{display:flex}
  .hamburger{display:none}
  .hero__grid{grid-template-columns:1.05fr .95fr;gap:48px;padding:80px 24px 84px}
  .hero__stage{order:0;max-width:none}
  .feature__grid{grid-template-columns:1fr 1fr;gap:56px}
  .signup__inner{grid-template-columns:1fr auto;gap:40px}
  .modal__grid{grid-template-columns:1fr 1fr}
  .modal__media{border-right:1px solid var(--line);border-bottom:none}
}
@media(min-width:1001px){
  .grid{grid-template-columns:repeat(4,1fr)}
  .footer__grid{grid-template-columns:2fr 1fr 1fr 1fr 1fr}
  .footer__brand{grid-column:auto}
}

/* ============ reduced motion ============ */
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
}