/* BlackSig Systems — homepage-only section styling (hero, about, "what we do" /
   approach principle lists, products section chrome, contact form). Ported verbatim
   from the original index.html. The reusable design system (tokens, atmosphere, nav,
   footer, buttons, .stat, .card, ticker, reveal) lives in brand.css / brand-tokens.css;
   this file only carries what is unique to the homepage. Linked after brand.css in
   app/layout.tsx. */

/* ===== Hero ===== */
.hero{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:150px 24px 90px;position:relative;overflow:hidden}
/* Scanline scoped to the hero (absolute, not fixed) so it sweeps only this section
   and scrolls away with it — reuses the shared scanmove keyframes from brand.css. */
.hero-scan{position:absolute;left:0;right:0;height:1px;z-index:2;pointer-events:none;background:linear-gradient(90deg,transparent,var(--cyan),transparent);box-shadow:0 0 12px rgba(34,211,238,.4);opacity:.5;animation:scanmove 7s linear infinite}
.hero-status{display:inline-flex;align-items:center;gap:10px;font-family:var(--fm);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--gray);border:1px solid var(--line2);background:var(--panel);backdrop-filter:blur(8px);padding:8px 16px;border-radius:40px;margin-bottom:34px;opacity:0;animation:rise .7s ease forwards .15s}
.hero-status .live{width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan);animation:beat 1.8s ease-in-out infinite}
.hero-status b{color:var(--vl);font-weight:500}

.hero-title{font-family:var(--fd);font-weight:800;font-size:clamp(64px,15vw,210px);line-height:.84;letter-spacing:.01em;position:relative;opacity:0;animation:rise 1.1s cubic-bezier(.16,1,.3,1) forwards .3s}
.hero-title .b{color:var(--white)}
.hero-title .s{background:linear-gradient(160deg,#ffffff 0%,#c7d0db 38%,#8a94a3 70%,#5c6470 100%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;position:relative}
.hero-title::after{content:'';position:absolute;left:50%;bottom:-2px;transform:translateX(-50%);width:0;height:2px;background:linear-gradient(90deg,transparent,var(--cyan),transparent);animation:underscan 1s ease forwards 1.1s}
@keyframes underscan{to{width:78%}}

.hero-tag{font-family:var(--fm);font-weight:400;font-size:clamp(12px,2.1vw,20px);letter-spacing:.3em;text-transform:uppercase;color:var(--al);margin:26px 0 0;opacity:0;animation:rise .8s ease forwards .55s}
.hero-sub{font-size:clamp(15px,1.6vw,18px);font-weight:300;color:var(--gray);max-width:560px;margin:28px auto 0;line-height:1.75;opacity:0;animation:rise .8s ease forwards .72s}
.hero-sub .hl{color:var(--white)}
.hero-btns{display:flex;gap:14px;align-items:center;justify-content:center;flex-wrap:wrap;margin-top:42px;opacity:0;animation:rise .8s ease forwards .9s}
@keyframes rise{from{opacity:0;transform:translateY(26px)}to{opacity:1;transform:none}}

/* live signal readout under hero */
.readout{display:flex;gap:26px;flex-wrap:wrap;justify-content:center;margin-top:54px;opacity:0;animation:rise .9s ease forwards 1.1s}
.ro{display:flex;align-items:center;gap:9px;font-family:var(--fm);font-size:11px;letter-spacing:.1em;color:var(--gray2)}
.ro b{color:var(--white);font-weight:500}
.ro .bar{display:flex;align-items:flex-end;gap:2px;height:16px}
.ro .bar i{width:3px;background:var(--cyan);border-radius:1px;animation:eq 1.1s ease-in-out infinite}
.ro .bar i:nth-child(2){animation-delay:.15s;background:var(--vl)}
.ro .bar i:nth-child(3){animation-delay:.3s;background:var(--amber)}
.ro .bar i:nth-child(4){animation-delay:.45s;background:var(--cyan)}
@keyframes eq{0%,100%{height:4px;opacity:.5}50%{height:16px;opacity:1}}

.scrollcue{position:absolute;bottom:30px;left:50%;transform:translateX(-50%);display:flex;flex-direction:column;align-items:center;gap:8px;opacity:0;animation:rise .6s ease forwards 1.5s}
.scrollcue .ln{width:1px;height:46px;background:linear-gradient(var(--gray2),transparent);animation:slide 2.2s ease-in-out infinite}
@keyframes slide{0%{transform:scaleY(0);transform-origin:top}45%{transform:scaleY(1);transform-origin:top}50%{transform:scaleY(1);transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}
.scrollcue span{font-family:var(--fm);font-size:9px;letter-spacing:.2em;text-transform:uppercase;color:var(--gray2)}

/* ===== About ===== */
.about-grid{display:grid;grid-template-columns:4.2fr 6fr;gap:74px;align-items:start}
.about-body{display:flex;flex-direction:column}
.about-p{font-size:16px;font-weight:300;color:var(--gray);line-height:1.85;padding-bottom:38px;margin-bottom:38px;border-bottom:1px solid var(--line);position:relative;padding-left:42px}
.about-p:last-of-type{border-bottom:none;margin-bottom:0;padding-bottom:0}
.about-p strong{color:var(--white);font-weight:500}
.about-p::before{content:attr(data-n);position:absolute;left:0;top:3px;font-family:var(--fm);font-weight:500;font-size:11px;color:var(--cyan);letter-spacing:.1em}
.about-p::after{content:'';position:absolute;left:5px;top:24px;bottom:38px;width:1px;background:linear-gradient(var(--line2),transparent)}
.about-p:last-of-type::after{display:none}
.badge-q{margin-top:38px;padding:24px 26px;border:1px solid var(--line2);border-left:2px solid var(--amber);background:linear-gradient(120deg,rgba(245,177,75,.06),transparent);border-radius:0 8px 8px 0}
.badge-q p{font-size:13.5px;font-weight:300;color:var(--gray);line-height:1.7}
.badge-q strong{color:var(--al);font-weight:500}

/* ===== Products (section chrome) ===== */
.products{background:var(--bg2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.phead{display:grid;grid-template-columns:1fr 1fr;gap:46px;align-items:end;margin-bottom:60px}
.phead p{font-size:15px;color:var(--gray);line-height:1.8}

/* ===== Featured case-study teaser (client delivery — ranks above own-tools) ===== */
.cs-teaser{display:grid;grid-template-columns:1.5fr 1fr;gap:34px;align-items:center}
.cs-teaser .cs-thumb{width:100%;height:auto;display:block;border:1px solid var(--line2);border-radius:10px;background:var(--panel)}
.cs-teaser .cs-more{display:inline-flex;align-items:center;gap:8px;margin-top:20px;font-family:var(--fd);font-size:13px;font-weight:500;color:var(--cl)}
.cs-teaser .cs-more svg{transition:transform .25s}
.card:hover .cs-teaser .cs-more svg{transform:translateX(4px)}
@media(max-width:760px){.cs-teaser{grid-template-columns:1fr;gap:22px}.cs-teaser .cs-thumb{order:-1}}

/* ===== Approach / What-we-do principle lists ===== */
.appr-grid{display:grid;grid-template-columns:5fr 7fr;gap:74px;align-items:start}
.appr-left p{font-size:15px;font-weight:300;color:var(--gray);line-height:1.8;margin-top:20px}
.appr-spec{margin-top:30px;font-family:var(--fm);font-size:11px;color:var(--gray2);letter-spacing:.06em;line-height:2}
.appr-spec span{color:var(--cyan)}
.prins{list-style:none}
.prin{display:grid;grid-template-columns:54px 1fr;gap:18px;padding:26px 0;border-bottom:1px solid var(--line);align-items:start;transition:.3s}
.prin:first-child{border-top:1px solid var(--line)}
.prin:hover{padding-left:8px}
.prin-n{font-family:var(--fm);font-weight:600;font-size:13px;padding-top:2px}
.prin:nth-child(1) .prin-n{color:var(--vl)}
.prin:nth-child(2) .prin-n{color:var(--cl)}
.prin:nth-child(3) .prin-n{color:var(--al)}
.prin:nth-child(4) .prin-n{color:var(--rose)}
.prin h4{font-family:var(--fd);font-weight:600;font-size:16px;margin-bottom:7px;color:var(--white)}
.prin p{font-size:13.5px;font-weight:300;color:var(--gray);line-height:1.72}

/* ===== Contact ===== */
.contact{background:var(--bg2);border-top:1px solid var(--line);overflow:hidden}
.cgrid{display:grid;grid-template-columns:5fr 7fr;gap:74px;align-items:start;position:relative}
.cleft h2{margin-bottom:18px}
.cleft .muted{color:var(--gray2)}
.cleft p{font-size:15px;font-weight:300;color:var(--gray);line-height:1.8}
.cmeta{margin-top:30px;display:flex;flex-direction:column;gap:14px}
.cm{display:flex;align-items:center;gap:11px;font-family:var(--fm);font-size:12px;color:var(--gray);letter-spacing:.03em}
.cm .ic{width:26px;height:26px;border-radius:6px;border:1px solid var(--line2);display:flex;align-items:center;justify-content:center;color:var(--cyan);flex-shrink:0}
.cform{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:34px}
.frow{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px}
.fld{margin-bottom:16px}
.fld label{display:block;font-family:var(--fm);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--gray);margin-bottom:8px}
.fld input,.fld select,.fld textarea{width:100%;background:var(--bg);border:1px solid var(--line2);border-radius:7px;padding:13px 15px;color:var(--white);font-family:var(--ff);font-size:14px;font-weight:300;transition:.25s;outline:none}
.fld input:focus,.fld select:focus,.fld textarea:focus{border-color:var(--cyan);box-shadow:0 0 0 3px rgba(34,211,238,.1)}
.fld input::placeholder,.fld textarea::placeholder{color:var(--gray2)}
.fld textarea{min-height:120px;resize:vertical}
.fld select{cursor:pointer}
.fld select option{background:var(--bg3)}
.fsubmit{font-family:var(--fd);font-weight:600;font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:#06070d;background:linear-gradient(135deg,var(--cyan),var(--vl));border:none;padding:16px;border-radius:7px;cursor:pointer;width:100%;display:flex;align-items:center;justify-content:center;gap:9px;transition:.28s}
.fsubmit:hover{transform:translateY(-2px);box-shadow:0 10px 30px rgba(34,211,238,.3)}
.fsuccess{display:none;flex-direction:column;align-items:center;text-align:center;padding:50px 20px;gap:14px}
.fsuccess.show{display:flex}
.fsi{width:50px;height:50px;border-radius:50%;background:rgba(34,211,238,.1);border:1px solid rgba(34,211,238,.34);display:flex;align-items:center;justify-content:center;color:var(--cyan)}
.fsuccess h3{font-family:var(--fd);font-weight:600;font-size:21px}
.fsuccess p{font-size:14px;font-weight:300;color:var(--gray)}

/* ===== responsive (homepage sections) ===== */
@media(max-width:880px){
  .about-grid,.phead,.appr-grid,.cgrid{grid-template-columns:1fr;gap:40px}
  .frow{grid-template-columns:1fr}
}
@media(max-width:560px){
  .hero-btns{flex-direction:column}
  .readout{gap:16px}
  .hero-title{font-size:clamp(52px,18vw,80px);letter-spacing:0}
  .hero-tag{letter-spacing:.2em}
}
@media(max-width:360px){
  .hero-title{font-size:54px;letter-spacing:-.01em}
}