/* BlackSig Systems — shared theme + site chrome. Single source of truth for every
   reusable piece of the design system, ported verbatim from the original index.html:
     - base resets, body, selection, scrollbar
     - atmosphere layers (mesh / grid / grain / scanline)
     - nav (masthead + mobile menu) and footer
     - section primitives (.sec / .wrap / .eyebrow / .h2)
     - the button system (.btn-p / .btn-g)
     - the reusable .stat and .card components
     - ticker and reveal-on-scroll

   Consumed by BOTH rendering systems: the App Router homepage links it in
   app/layout.tsx, and every static public/*.html page (case studies, offers,
   articles) links it too — so new pages inherit the full theme automatically.
   Design tokens live in brand-tokens.css (imported below); do not redefine them.
   Homepage-only section styling (hero, about, model, approach, contact) lives in
   home.css; capture-page body styling lives in capture.css. */

@import url('/brand-tokens.css');

/* ===== Base ===== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}

body{background:var(--bg);color:var(--white);font-family:var(--ff);font-weight:300;line-height:1.65;overflow-x:hidden}

/* selection */
::selection{background:rgba(124,106,247,.3);color:#fff}

/* scrollbar */
::-webkit-scrollbar{width:10px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:var(--gray3);border-radius:5px}
::-webkit-scrollbar-thumb:hover{background:var(--gray2)}

/* ===== Atmosphere layers ===== */
.atmos{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.mesh{position:absolute;border-radius:50%;filter:blur(90px);opacity:.5}
.m1{width:60vw;height:60vw;max-width:760px;max-height:760px;background:radial-gradient(circle,rgba(124,106,247,.22),transparent 62%);top:-18vw;left:-8vw;animation:drift1 22s ease-in-out infinite}
.m2{width:46vw;height:46vw;max-width:600px;max-height:600px;background:radial-gradient(circle,rgba(34,211,238,.16),transparent 62%);bottom:-12vw;right:-6vw;animation:drift2 26s ease-in-out infinite}
.m3{width:38vw;height:38vw;max-width:480px;max-height:480px;background:radial-gradient(circle,rgba(245,177,75,.10),transparent 62%);top:38%;left:42%;animation:drift3 30s ease-in-out infinite}
@keyframes drift1{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(6vw,5vw) scale(1.08)}}
@keyframes drift2{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(-5vw,-4vw) scale(1.1)}}
@keyframes drift3{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(-4vw,4vw) scale(.92)}}

/* grid overlay */
.gridlay{position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(ellipse 100% 80% at 50% 0%,#000 10%,transparent 75%);
  mask-image:radial-gradient(ellipse 100% 80% at 50% 0%,#000 10%,transparent 75%);
  opacity:.5}

/* grain */
.grain{position:fixed;inset:-50%;width:200%;height:200%;z-index:1;pointer-events:none;opacity:.035;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation:grain 8s steps(8) infinite}
@keyframes grain{0%{transform:translate(0,0)}20%{transform:translate(-6%,3%)}40%{transform:translate(4%,-6%)}60%{transform:translate(-3%,6%)}80%{transform:translate(6%,-3%)}100%{transform:translate(0,0)}}

/* scanline */
.scan{position:fixed;left:0;right:0;height:1px;z-index:2;pointer-events:none;
  background:linear-gradient(90deg,transparent,rgba(34,211,238,.5),transparent);
  box-shadow:0 0 12px rgba(34,211,238,.4);opacity:.5;animation:scanmove 7s linear infinite}
@keyframes scanmove{0%{top:-2%}100%{top:102%}}

.shell{position:relative;z-index:5}

/* ===== Nav ===== */
nav{position:fixed;top:0;left:0;right:0;z-index:500;padding:18px 40px;display:flex;align-items:center;justify-content:space-between;transition:.4s;border-bottom:1px solid transparent}
nav.scrolled{background:rgba(4,5,10,.78);backdrop-filter:blur(22px);-webkit-backdrop-filter:blur(22px);border-color:var(--line);padding:14px 40px}
.logo{font-family:var(--fd);font-weight:700;font-size:19px;letter-spacing:.12em;color:var(--white);text-decoration:none;display:flex;align-items:center;gap:11px}
.logo .dot{width:9px;height:9px;border-radius:50%;background:var(--cyan);box-shadow:0 0 12px var(--cyan);animation:beat 2.4s ease-in-out infinite;position:relative}
.logo .dot::after{content:'';position:absolute;inset:-5px;border:1px solid rgba(34,211,238,.4);border-radius:50%;animation:ring 2.4s ease-out infinite}
@keyframes beat{0%,100%{opacity:1}50%{opacity:.45}}
@keyframes ring{0%{transform:scale(.6);opacity:.8}100%{transform:scale(1.8);opacity:0}}
.nav-links{display:flex;gap:30px;list-style:none}
.nav-links a{font-size:13px;font-weight:400;color:var(--gray);text-decoration:none;letter-spacing:.02em;transition:.25s;position:relative}
.nav-links a::after{content:'';position:absolute;left:0;bottom:-5px;width:0;height:1px;background:var(--cyan);transition:width .28s;box-shadow:0 0 8px var(--cyan)}
.nav-links a:hover{color:var(--white)}
.nav-links a:hover::after{width:100%}
.nav-cta{font-family:var(--fd);font-weight:600;font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:#06070d;background:linear-gradient(135deg,var(--cyan),var(--vl));padding:11px 22px;text-decoration:none;border-radius:3px;transition:.28s;box-shadow:0 0 0 rgba(34,211,238,0)}
.nav-cta:hover{box-shadow:0 6px 24px rgba(34,211,238,.32);transform:translateY(-1px)}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:4px;z-index:600}
.burger span{display:block;width:24px;height:1.5px;background:var(--white);transition:.3s}
.burger.open span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}
.mmenu{position:fixed;inset:0;z-index:550;background:rgba(4,5,10,.97);backdrop-filter:blur(20px);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:34px;opacity:0;pointer-events:none;transition:.35s}
.mmenu.open{opacity:1;pointer-events:all}
.mmenu a{font-family:var(--fd);font-weight:700;font-size:30px;color:var(--white);text-decoration:none;letter-spacing:-.01em}
.mmenu a:hover{color:var(--cyan)}
@media(max-width:880px){nav{padding:16px 22px}.nav-links,.nav-cta{display:none}.burger{display:flex}}

/* ===== Section primitives ===== */
.sec{padding:130px 40px;position:relative}
.wrap{max-width:1220px;margin:0 auto}
.eyebrow{font-family:var(--fm);font-weight:500;font-size:11px;letter-spacing:.24em;text-transform:uppercase;color:var(--cyan);margin-bottom:22px;display:flex;align-items:center;gap:12px}
.eyebrow::before{content:'';width:26px;height:1px;background:linear-gradient(90deg,var(--cyan),transparent)}
.h2{font-family:var(--fd);font-weight:700;font-size:clamp(32px,4.4vw,56px);line-height:1.02;letter-spacing:-.025em}
.h2 em{font-style:normal;background:linear-gradient(120deg,var(--vl),var(--cyan));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
@media(max-width:880px){.sec{padding:84px 22px}}

/* ===== Button system ===== */
.btn-p{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));padding:16px 30px;text-decoration:none;border-radius:4px;transition:.28s;box-shadow:0 8px 30px rgba(124,106,247,.22)}
.btn-p:hover{transform:translateY(-2px);box-shadow:0 12px 38px rgba(34,211,238,.34)}
.btn-g{font-family:var(--fd);font-size:13px;font-weight:500;letter-spacing:.04em;color:var(--white);text-decoration:none;display:flex;align-items:center;gap:9px;padding:16px 20px;border:1px solid var(--line2);border-radius:4px;transition:.28s;background:var(--panel)}
.btn-g:hover{border-color:var(--cyan);color:var(--cl)}
.btn-g svg{transition:transform .25s}
.btn-g:hover svg{transform:translateX(4px)}

/* ===== Ticker ===== */
.ticker{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:16px 0;overflow:hidden;background:var(--bg2);position:relative;z-index:5}
.tk-track{display:flex;width:max-content;animation:roll 32s linear infinite}
.tk-track:hover{animation-play-state:paused}
@keyframes roll{from{transform:translateX(0)}to{transform:translateX(-50%)}}
.tk{font-family:var(--fm);font-weight:500;font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--gray2);white-space:nowrap;padding:0 30px;display:flex;align-items:center;gap:30px}
.tk b{width:4px;height:4px;border-radius:50%}
.tk:nth-child(odd) b{background:var(--cyan);box-shadow:0 0 6px var(--cyan)}
.tk:nth-child(even) b{background:var(--vl);box-shadow:0 0 6px var(--vl)}

/* ===== Stat component (reusable) ===== */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:74px}
.stat{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:30px 26px;position:relative;overflow:hidden;transition:.32s}
.stat::before{content:'';position:absolute;top:0;left:0;right:0;height:2px;opacity:0;transition:.35s}
.stat:nth-child(1)::before{background:linear-gradient(90deg,transparent,var(--violet),transparent)}
.stat:nth-child(2)::before{background:linear-gradient(90deg,transparent,var(--cyan),transparent)}
.stat:nth-child(3)::before{background:linear-gradient(90deg,transparent,var(--amber),transparent)}
.stat:nth-child(4)::before{background:linear-gradient(90deg,transparent,var(--rose),transparent)}
.stat:hover{background:var(--panel2);transform:translateY(-3px)}
.stat:hover::before{opacity:1}
.stat-n{font-family:var(--fd);font-weight:700;font-size:clamp(30px,3.4vw,44px);letter-spacing:-.02em;line-height:1;margin-bottom:9px}
.stat:nth-child(1) .stat-n{color:var(--vl)}
.stat:nth-child(2) .stat-n{color:var(--cl)}
.stat:nth-child(3) .stat-n{color:var(--al)}
.stat:nth-child(4) .stat-n{color:var(--rose)}
.stat-d{font-size:12.5px;font-weight:300;color:var(--gray)}

/* ===== Card component (reusable) ===== */
.pgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:34px 30px;position:relative;overflow:hidden;transition:.34s;--ac:var(--violet)}
.card:nth-child(1){--ac:var(--violet)}
.card:nth-child(2){--ac:var(--cyan)}
.card:nth-child(3){--ac:var(--rose)}
.card:nth-child(4){--ac:var(--amber)}
.card:nth-child(5){--ac:var(--vl)}
.card:nth-child(6){--ac:var(--cl)}
.card::before{content:'';position:absolute;inset:0;background:radial-gradient(circle at 50% 0%,color-mix(in srgb,var(--ac) 14%,transparent),transparent 60%);opacity:0;transition:.34s}
.card::after{content:'';position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,var(--ac),transparent);opacity:0;transition:.34s}
.card:hover{transform:translateY(-5px);border-color:color-mix(in srgb,var(--ac) 40%,transparent);background:var(--panel2)}
.card:hover::before{opacity:1}
.card:hover::after{opacity:1}
.card-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px}
.card-tag{font-family:var(--fm);font-weight:500;font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:var(--ac)}
.card-stat{font-family:var(--fm);font-size:9px;letter-spacing:.12em;text-transform:uppercase;color:var(--gray2);display:flex;align-items:center;gap:6px}
.card-stat .d{width:5px;height:5px;border-radius:50%;background:var(--ac);box-shadow:0 0 6px var(--ac)}
.card-icon{width:42px;height:42px;color:var(--ac);margin-bottom:20px}
.card h3{font-family:var(--fd);font-weight:600;font-size:18px;letter-spacing:-.01em;margin-bottom:11px;color:var(--white)}
.card p{font-size:13.5px;font-weight:300;color:var(--gray);line-height:1.74;margin-bottom:22px}
.card-tags{display:flex;flex-wrap:wrap;gap:6px}
.tg{font-family:var(--fm);font-weight:400;font-size:10px;letter-spacing:.05em;color:var(--gray2);border:1px solid var(--line);padding:4px 9px;border-radius:20px;transition:.25s}
.card:hover .tg{border-color:var(--line2);color:var(--gray)}

/* ===== Footer ===== */
footer{background:var(--bg);border-top:1px solid var(--line);padding:42px 40px;position:relative;z-index:5}
.fgrid{max-width:1220px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}
.flogo{font-family:var(--fd);font-weight:700;font-size:14px;letter-spacing:.14em;color:var(--white);text-decoration:none}
.flogo span{color:var(--gray2)}
.fnav{display:flex;gap:24px}
.fnav a{font-size:12px;color:var(--gray);text-decoration:none;transition:.25s}
.fnav a:hover{color:var(--cyan)}
.fr{font-family:var(--fm);font-size:11px;color:var(--gray2);letter-spacing:.05em}

/* ===== Reveal-on-scroll ===== */
.rv{opacity:0;transform:translateY(30px);transition:opacity .9s cubic-bezier(.16,1,.3,1),transform .9s cubic-bezier(.16,1,.3,1)}
.rv.in{opacity:1;transform:none}
.d1{transition-delay:.08s}.d2{transition-delay:.16s}.d3{transition-delay:.24s}.d4{transition-delay:.32s}.d5{transition-delay:.4s}

/* ===== responsive (shared components) ===== */
@media(max-width:880px){
  .pgrid{grid-template-columns:1fr 1fr}
  .stats{grid-template-columns:1fr 1fr}
  .fgrid{flex-direction:column;text-align:center;gap:18px}
}
@media(max-width:560px){
  .pgrid{grid-template-columns:1fr}
  .stats{grid-template-columns:1fr 1fr}
}
@media(max-width:360px){
  .sec{padding:72px 18px}
  nav{padding:14px 18px}
}