/* ==========================================================================
   John Christopher B. Sauquillo (Frostvym) — Portfolio
   Theme: Dark Neon / Cyber
   ========================================================================== */

:root{
  --bg:#05070d;
  --bg-2:#080c16;
  --surface:rgba(16,22,38,.55);
  --surface-solid:#0d1424;
  --line:rgba(120,190,255,.14);
  --line-strong:rgba(0,229,255,.45);
  --text:#e6f1ff;
  --muted:#8ea2c0;
  --dim:#5d6f8d;

  --neon:#00e5ff;
  --neon-2:#7c5cff;
  --neon-3:#22ff9e;
  --neon-4:#ff3d81;

  --glow-cyan:0 0 12px rgba(0,229,255,.55), 0 0 42px rgba(0,229,255,.22);
  --glow-violet:0 0 12px rgba(124,92,255,.55), 0 0 42px rgba(124,92,255,.22);

  --radius:18px;
  --radius-sm:12px;
  --maxw:1200px;
  --ease:cubic-bezier(.22,.9,.28,1);
  --font:"Segoe UI", Roboto, "Helvetica Neue", Arial, system-ui, sans-serif;
  --mono:"Cascadia Code", "JetBrains Mono", Consolas, "SF Mono", ui-monospace, monospace;
}

*,*::before,*::after{box-sizing:border-box}

html{
  scroll-behavior:smooth;
  -webkit-text-size-adjust:100%;
}

body{
  margin:0;
  min-height:100vh;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font);
  font-size:16px;
  line-height:1.65;
  overflow-x:hidden;
  letter-spacing:.1px;
}

body.is-locked{overflow:hidden}

img,svg{max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}

::selection{background:rgba(0,229,255,.28);color:#fff}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar{width:10px}
::-webkit-scrollbar-track{background:#05070d}
::-webkit-scrollbar-thumb{
  background:linear-gradient(180deg,var(--neon),var(--neon-2));
  border-radius:99px;border:2px solid #05070d;
}

/* ==========================================================================
   Backdrop layers
   ========================================================================== */
#bg3d{
  position:fixed;inset:0;
  width:100%;height:100%;
  z-index:0;
  display:block;
  pointer-events:none;
  opacity:0;
  transition:opacity .45s ease;
}
#bg3d.is-ready{opacity:1}

/* CSS fallback (also used behind canvas) */
.bg-fallback{
  position:fixed;inset:0;z-index:-1;
  background:
    radial-gradient(1100px 700px at 12% -8%, rgba(0,229,255,.16), transparent 60%),
    radial-gradient(900px 620px at 92% 6%, rgba(124,92,255,.18), transparent 62%),
    radial-gradient(760px 560px at 50% 110%, rgba(34,255,158,.10), transparent 60%),
    linear-gradient(180deg,#05070d 0%,#070b14 45%,#05070d 100%);
}
.bg-fallback::after{
  content:"";
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(120,190,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120,190,255,.05) 1px, transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(circle at 50% 30%, #000 10%, transparent 78%);
  -webkit-mask-image:radial-gradient(circle at 50% 30%, #000 10%, transparent 78%);
}

.bg-vignette{
  position:fixed;inset:0;z-index:1;pointer-events:none;
  background:radial-gradient(120% 90% at 50% 45%, transparent 35%, rgba(3,5,10,.72) 100%);
}

main,header.nav{position:relative;z-index:2}

/* ---------- Cursor glow ---------- */
.cursor-glow{
  position:fixed;top:0;left:0;
  width:520px;height:520px;
  border-radius:50%;
  pointer-events:none;z-index:1;
  transform:translate(-50%,-50%);
  background:radial-gradient(circle, rgba(0,229,255,.10), rgba(124,92,255,.06) 42%, transparent 68%);
  transition:opacity .4s ease;
  opacity:0;
}
body.has-pointer .cursor-glow{opacity:1}

/* ---------- Scroll progress ---------- */
.scroll-progress{
  position:fixed;top:0;left:0;right:0;height:3px;z-index:60;
  background:transparent;
}
.scroll-progress span{
  display:block;height:100%;width:0%;
  background:linear-gradient(90deg,var(--neon),var(--neon-2) 60%,var(--neon-3));
  box-shadow:0 0 14px rgba(0,229,255,.6);
}

/* ==========================================================================
   Boot sequence
   ========================================================================== */
.boot{
  position:fixed;inset:0;z-index:200;
  display:none;flex-direction:column;
  align-items:center;justify-content:center;
  gap:16px;
  background:radial-gradient(circle at 50% 40%, #0a1120, #04060b 70%);
  transition:opacity .45s ease, visibility .45s ease;
}
.js .boot{display:flex}
.boot.is-done{opacity:0;visibility:hidden}

.boot__grid{
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(0,229,255,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,229,255,.06) 1px, transparent 1px);
  background-size:52px 52px;
  mask-image:radial-gradient(circle at 50% 50%, #000 5%, transparent 65%);
  -webkit-mask-image:radial-gradient(circle at 50% 50%, #000 5%, transparent 65%);
  animation:gridDrift 14s linear infinite;
}
@keyframes gridDrift{to{background-position:52px 52px}}

.boot__core{
  position:relative;width:132px;height:132px;
  display:grid;place-items:center;
  perspective:800px;
}
.boot__ring{
  position:absolute;inset:0;
  border:1.5px solid rgba(0,229,255,.35);
  border-top-color:var(--neon);
  border-radius:50%;
  animation:spin 1.5s linear infinite;
  box-shadow:var(--glow-cyan);
}
.boot__ring--2{
  inset:16px;
  border-color:rgba(124,92,255,.3);
  border-bottom-color:var(--neon-2);
  animation:spin 1.1s linear infinite reverse;
  box-shadow:var(--glow-violet);
}
@keyframes spin{to{transform:rotate(360deg)}}

.boot__logo{
  font-family:var(--mono);font-weight:700;font-size:30px;
  color:var(--neon);
  text-shadow:var(--glow-cyan);
  animation:pulse 1.6s ease-in-out infinite;
}
@keyframes pulse{50%{opacity:.45}}

.boot__label{
  margin:0;font-family:var(--mono);font-size:12px;letter-spacing:.34em;
  color:var(--muted);text-transform:uppercase;
}
.boot__bar{
  width:min(320px,72vw);height:3px;border-radius:99px;
  background:rgba(120,190,255,.14);overflow:hidden;
}
.boot__bar span{
  display:block;height:100%;width:0%;
  background:linear-gradient(90deg,var(--neon),var(--neon-2));
  box-shadow:0 0 12px rgba(0,229,255,.7);
  transition:width .25s var(--ease);
}
.boot__log{
  margin:0;height:18px;font-family:var(--mono);font-size:11.5px;
  color:var(--dim);letter-spacing:.06em;
}

/* ==========================================================================
   Navigation
   ========================================================================== */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:50;
  display:flex;align-items:center;justify-content:space-between;
  gap:18px;
  padding:16px clamp(16px,4vw,44px);
  transition:background .35s var(--ease), backdrop-filter .35s, padding .35s var(--ease), border-color .35s;
  border-bottom:1px solid transparent;
}
.nav.is-stuck{
  padding-top:10px;padding-bottom:10px;
  background:rgba(5,7,13,.78);
  backdrop-filter:blur(16px) saturate(150%);
  -webkit-backdrop-filter:blur(16px) saturate(150%);
  border-bottom-color:var(--line);
}

.nav__links{display:flex;align-items:center;justify-content:center;gap:4px;flex:1}
.nav__link{
  position:relative;display:flex;align-items:center;gap:8px;
  padding:9px 15px;border-radius:99px;
  font-size:13.5px;font-weight:600;color:var(--muted);
  transition:color .25s, background .25s, transform .25s var(--ease);
}
.nav__link i{
  font-style:normal;font-family:var(--mono);font-size:9.5px;
  color:var(--dim);transition:color .25s;
}
.nav__link::after{
  content:"";position:absolute;left:50%;bottom:4px;
  width:0;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--neon),var(--neon-2));
  transform:translateX(-50%);
  transition:width .3s var(--ease);
}
.nav__link:hover,.nav__link.is-active{color:#fff;background:rgba(0,229,255,.07)}
.nav__link:hover i,.nav__link.is-active i{color:var(--neon)}
.nav__link.is-active::after,.nav__link:hover::after{width:26px}

.nav__right{display:flex;align-items:center;gap:12px}

.nav__toggle{
  display:none;width:42px;height:42px;
  border:1px solid var(--line);border-radius:12px;
  background:rgba(16,22,38,.6);cursor:pointer;
  padding:12px 10px;flex-direction:column;justify-content:space-between;
}
.nav__toggle span{
  display:block;height:2px;border-radius:2px;background:var(--neon);
  transition:transform .3s var(--ease), opacity .2s;
}
.nav__toggle.is-open span:nth-child(1){transform:translateY(8px) rotate(45deg)}
.nav__toggle.is-open span:nth-child(2){opacity:0}
.nav__toggle.is-open span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn{
  position:relative;display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:13px 26px;border-radius:99px;
  font-size:14px;font-weight:700;letter-spacing:.3px;
  border:1px solid transparent;cursor:pointer;
  overflow:hidden;
  transition:transform .3s var(--ease), box-shadow .3s var(--ease), background .3s, color .3s, border-color .3s;
  white-space:nowrap;
}
.btn svg{width:17px;height:17px;transition:transform .3s var(--ease)}
.btn:hover svg{transform:translateX(4px)}

.btn--primary{
  color:#04070e;
  background:linear-gradient(135deg,var(--neon),var(--neon-2));
  box-shadow:0 10px 30px -12px rgba(0,229,255,.75), inset 0 1px 0 rgba(255,255,255,.45);
}
.btn--primary:hover{transform:translateY(-3px);box-shadow:0 18px 44px -14px rgba(0,229,255,.9)}

.btn--outline{
  color:var(--text);
  border-color:var(--line-strong);
  background:rgba(0,229,255,.05);
}
.btn--outline:hover{
  transform:translateY(-3px);
  background:rgba(0,229,255,.12);
  box-shadow:var(--glow-cyan);
}

.btn--ghost{
  border-color:var(--line);
  background:rgba(16,22,38,.5);
  color:var(--muted);
}
.btn--ghost:hover{color:#fff;border-color:var(--line-strong);box-shadow:var(--glow-cyan)}

.btn--sm{padding:9px 18px;font-size:12.5px}

.round-btn{
  display:grid;place-items:center;
  width:46px;height:46px;border-radius:50%;
  border:1px solid var(--line-strong);
  background:rgba(16,22,38,.6);
  color:var(--neon);cursor:pointer;
  transition:transform .3s var(--ease), background .3s, box-shadow .3s;
}
.round-btn svg{width:20px;height:20px}
.round-btn:hover{background:rgba(0,229,255,.14);box-shadow:var(--glow-cyan);transform:translateY(-3px)}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero{
  position:relative;
  min-height:100svh;
  display:flex;align-items:center;
  padding:130px clamp(16px,5vw,60px) 100px;
}
.hero__inner{width:100%;max-width:var(--maxw);margin:0 auto}

.hero__eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  margin:0 0 20px;
  padding:7px 16px;border-radius:99px;
  border:1px solid var(--line);
  background:rgba(0,229,255,.06);
  font-size:12px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;
  color:var(--muted);
}
.hero__eyebrow .dot{
  width:7px;height:7px;border-radius:50%;background:var(--neon-3);
  box-shadow:0 0 10px var(--neon-3);
  animation:blink 1.8s ease-in-out infinite;
}
@keyframes blink{50%{opacity:.25}}

.hero__title{
  margin:0;
  font-size:clamp(2.4rem,7.4vw,5.4rem);
  line-height:1.02;
  font-weight:800;
  letter-spacing:-1.6px;
  text-transform:uppercase;
}
.hero__title .line{display:block}
.grad{
  background:linear-gradient(100deg,var(--neon),var(--neon-2) 48%,var(--neon-3));
  -webkit-background-clip:text;background-clip:text;
  color:transparent;
  filter:drop-shadow(0 0 26px rgba(0,229,255,.35));
}

.hero__alias{
  margin:14px 0 0;
  font-family:var(--mono);font-size:14px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--dim);
}
.hero__alias strong{color:var(--neon)}

.hero__cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}

.hero__stats{
  display:flex;flex-wrap:wrap;gap:16px;
  margin-top:56px;
  perspective:900px;
}
.stat{
  flex:1 1 190px;
  padding:20px 22px;
  border-radius:var(--radius-sm);
  border:1px solid var(--line);
  background:linear-gradient(160deg, rgba(16,22,38,.7), rgba(10,15,26,.5));
  backdrop-filter:blur(8px);
  transition:border-color .3s, box-shadow .3s;
}
.stat:hover{border-color:var(--line-strong);box-shadow:0 0 30px -10px rgba(0,229,255,.5)}
.stat__num{
  display:block;
  font-family:var(--mono);font-size:30px;line-height:1;
  color:var(--neon);text-shadow:var(--glow-cyan);
}
.stat__label{
  display:block;margin-top:8px;
  font-size:11.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--dim);
}

.scroll-hint{
  position:absolute;bottom:26px;left:50%;transform:translateX(-50%);
  display:flex;flex-direction:column;align-items:center;gap:9px;
  font-family:var(--mono);font-size:10px;letter-spacing:.3em;
  text-transform:uppercase;color:var(--dim);
}
.scroll-hint i{
  width:1.5px;height:44px;border-radius:2px;
  background:linear-gradient(180deg,var(--neon),transparent);
  animation:hintDrop 1.9s ease-in-out infinite;
}
@keyframes hintDrop{0%,100%{opacity:.25;transform:scaleY(.5)}50%{opacity:1;transform:scaleY(1)}}

/* ==========================================================================
   Sections
   ========================================================================== */
.section{
  max-width:var(--maxw);
  margin:0 auto;
  padding:clamp(70px,10vw,120px) clamp(16px,5vw,44px);
}

.section__head{margin-bottom:52px;max-width:760px}
.section__index{
  display:inline-block;
  font-family:var(--mono);font-size:12px;letter-spacing:.3em;
  color:var(--neon);opacity:.75;
}
.section__title{
  margin:8px 0 10px;
  font-size:clamp(1.9rem,4.6vw,3.1rem);
  font-weight:800;letter-spacing:-1px;line-height:1.08;
  text-transform:uppercase;
}
.section__sub{margin:0;color:var(--muted);font-size:14.5px}

.glass{
  border:1px solid var(--line);
  background:linear-gradient(160deg, rgba(16,22,38,.72), rgba(8,12,22,.55));
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border-radius:var(--radius);
  box-shadow:0 30px 70px -40px rgba(0,0,0,.9), inset 0 1px 0 rgba(255,255,255,.05);
}

/* ==========================================================================
   About
   ========================================================================== */
.about{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.25fr);
  gap:38px;align-items:start;
}
.about__card{padding:32px;position:relative;overflow:hidden}
.about__card::before{
  content:"";position:absolute;inset:-2px;
  background:radial-gradient(300px 220px at 80% -10%, rgba(0,229,255,.14), transparent 70%);
  pointer-events:none;
}
.about__badge{
  display:inline-block;margin-bottom:14px;
  padding:5px 13px;border-radius:99px;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.24em;
  border:1px solid var(--line-strong);color:var(--neon);
}
.about__card h3{
  margin:0 0 12px;font-size:2.1rem;letter-spacing:-.6px;
  background:linear-gradient(100deg,#fff,var(--neon));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.about__card p{margin:0 0 20px;color:var(--muted);font-size:14.5px}
.about__list{list-style:none;margin:0;padding:0;display:grid;gap:11px}
.about__list li{display:flex;align-items:center;gap:11px;font-size:14px;color:#cfe1f7}
.about__list i{
  width:7px;height:7px;border-radius:2px;flex:none;
  background:linear-gradient(135deg,var(--neon),var(--neon-2));
  box-shadow:0 0 10px rgba(0,229,255,.7);
}

.about__body p{color:var(--muted);font-size:15.5px;margin:0 0 18px}
.about__body p strong{color:#fff}
.about__pills{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.pill{
  padding:7px 15px;border-radius:99px;
  border:1px solid var(--line);background:rgba(0,229,255,.05);
  font-size:12.5px;color:#bcd3ee;font-weight:600;
  transition:border-color .25s, color .25s, box-shadow .25s;
}
.pill:hover{border-color:var(--line-strong);color:#fff;box-shadow:var(--glow-cyan)}

/* ==========================================================================
   Skill cards (3D flip)
   ========================================================================== */
.cards{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(255px,1fr));
  gap:22px;
  perspective:1400px;
}
.card3d{
  position:relative;
  min-height:310px;
  outline:none;
  transform-style:preserve-3d;
  transition:transform .5s var(--ease), filter .4s;
  will-change:transform;
}
.card3d__inner{
  position:relative;width:100%;height:100%;min-height:310px;
  transform-style:preserve-3d;
  transition:transform .75s var(--ease);
}
.card3d:hover .card3d__inner,
.card3d:focus-visible .card3d__inner,
.card3d.is-flipped .card3d__inner{transform:rotateY(180deg)}

.card3d__face{
  position:absolute;inset:0;
  display:flex;flex-direction:column;
  padding:28px 24px;
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:linear-gradient(160deg, rgba(16,22,38,.86), rgba(8,12,22,.72));
  backdrop-filter:blur(12px);
  -webkit-backface-visibility:hidden;backface-visibility:hidden;
  transform-style:preserve-3d;
  box-shadow:0 26px 60px -38px rgba(0,0,0,.95);
  overflow:hidden;
}
.card3d__front::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(240px 180px at 15% 0%, rgba(0,229,255,.16), transparent 70%);
  opacity:0;transition:opacity .5s;
}
.card3d:hover .card3d__front::before{opacity:1}

.card3d__icon{
  width:56px;height:56px;border-radius:15px;
  display:grid;place-items:center;
  color:var(--neon);
  border:1px solid var(--line-strong);
  background:rgba(0,229,255,.07);
  box-shadow:inset 0 0 20px -8px rgba(0,229,255,.6);
  margin-bottom:22px;
  transition:transform .5s var(--ease);
}
.card3d__icon svg{width:27px;height:27px}
.card3d:hover .card3d__icon{transform:translateZ(40px)}

.card3d__front h3{
  margin:0 0 8px;font-size:1.28rem;letter-spacing:-.4px;line-height:1.25;
  position:relative;
}
.card3d__tag{margin:0;color:var(--muted);font-size:13.5px;position:relative}
.card3d__hint{
  margin-top:auto;padding-top:18px;
  font-family:var(--mono);font-size:10px;letter-spacing:.26em;
  text-transform:uppercase;color:var(--dim);position:relative;
}

.card3d__back{
  transform:rotateY(180deg);
  border-color:var(--line-strong);
  background:linear-gradient(160deg, rgba(0,229,255,.10), rgba(124,92,255,.10) 55%, rgba(8,12,22,.9));
}
.card3d__back h4{
  margin:0 0 16px;
  font-family:var(--mono);font-size:11px;letter-spacing:.26em;
  text-transform:uppercase;color:var(--neon);
}
.card3d__back ul{list-style:none;margin:0;padding:0;display:grid;gap:11px;align-content:start}
.card3d__back li{
  position:relative;padding-left:20px;
  font-size:13.4px;color:#d6e6fb;line-height:1.45;
}
.card3d__back li::before{
  content:"";position:absolute;left:0;top:8px;
  width:8px;height:8px;border-radius:2px;
  background:linear-gradient(135deg,var(--neon-3),var(--neon));
}

/* ==========================================================================
   Systems carousel
   ========================================================================== */
.section--systems{overflow:visible}

.carousel{
  position:relative;
  display:flex;flex-direction:column;align-items:center;
  gap:34px;
}
.carousel__stage{
  position:relative;
  width:100%;
  height:430px;
  perspective:1500px;
  cursor:grab;
  touch-action:pan-y;
}
.carousel__stage.is-dragging{cursor:grabbing}

.carousel__ring{
  position:absolute;top:50%;left:50%;
  width:0;height:0;
  transform-style:preserve-3d;
  will-change:transform;
}
.carousel__ring.is-animated{transition:transform .8s var(--ease)}

.panel{
  position:absolute;
  top:-150px;left:-135px;
  width:270px;height:300px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:9px;
  padding:26px 22px;
  text-align:center;
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:linear-gradient(165deg, rgba(16,22,38,.94), rgba(7,11,20,.86));
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  box-shadow:0 34px 70px -40px #000, inset 0 1px 0 rgba(255,255,255,.05);
  transform-style:preserve-3d;
  transition:border-color .4s, box-shadow .4s, background .4s;
  cursor:pointer;
  overflow:hidden;
}
.panel::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(220px 170px at 50% 0%, rgba(0,229,255,.16), transparent 72%);
  opacity:.5;transition:opacity .4s;
}
.panel:hover,.panel.is-active{
  border-color:var(--line-strong);
  box-shadow:0 0 44px -14px rgba(0,229,255,.75), inset 0 1px 0 rgba(255,255,255,.08);
}
.panel:hover::before{opacity:1}

.panel__no{
  position:absolute;top:14px;right:18px;
  font-family:var(--mono);font-size:11px;letter-spacing:.2em;color:var(--dim);
}
.panel__icon{
  width:58px;height:58px;border-radius:16px;
  display:grid;place-items:center;
  color:var(--neon);border:1px solid var(--line-strong);
  background:rgba(0,229,255,.07);
  margin-bottom:6px;position:relative;
}
.panel__icon svg{width:29px;height:29px}
.panel__title{
  font-size:1.06rem;font-weight:700;letter-spacing:-.3px;line-height:1.28;
  color:#fff;position:relative;
}
.panel__sub{
  font-family:var(--mono);font-size:10.5px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--neon-3);position:relative;
}
.panel__more{
  margin-top:8px;font-size:12.4px;color:var(--muted);
  max-width:210px;position:relative;
  max-height:0;opacity:0;overflow:hidden;
  transition:max-height .45s var(--ease), opacity .35s var(--ease);
}
.panel:hover .panel__more,.panel.is-active .panel__more{max-height:80px;opacity:1}

.carousel__floor{
  position:absolute;top:calc(50% + 175px);left:50%;
  width:640px;height:120px;
  transform:translateX(-50%) rotateX(76deg);
  border-radius:50%;
  background:radial-gradient(closest-side, rgba(0,229,255,.22), rgba(0,229,255,.05) 55%, transparent 75%);
  filter:blur(2px);
  pointer-events:none;
}

.carousel__controls{display:flex;gap:14px;z-index:3}

.systems__note{
  margin-top:40px;padding:22px 26px;
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;
  font-size:14px;
}
.systems__note strong{color:#fff;font-size:13px;letter-spacing:.1em;text-transform:uppercase;font-family:var(--mono);opacity:.8}

/* ==========================================================================
   Contact
   ========================================================================== */
.contact{
  display:grid;
  grid-template-columns:260px minmax(0,1fr);
  gap:44px;align-items:center;
}
.contact__cube-wrap{
  height:260px;
  display:grid;place-items:center;
  perspective:1000px;
}
.cube{
  position:relative;
  width:140px;height:140px;
  transform-style:preserve-3d;
  transform:rotateX(-22deg) rotateY(28deg);
  animation:cubeSpin 18s linear infinite;
}
@keyframes cubeSpin{
  from{transform:rotateX(-22deg) rotateY(0deg)}
  to{transform:rotateX(-22deg) rotateY(360deg)}
}
.cube__face{
  position:absolute;
  width:140px;height:140px;
  display:grid;place-items:center;
  font-family:var(--mono);font-size:13px;font-weight:700;letter-spacing:.16em;
  color:var(--neon);
  border:1px solid var(--line-strong);
  background:linear-gradient(150deg, rgba(0,229,255,.12), rgba(124,92,255,.12));
  backdrop-filter:blur(3px);
  box-shadow:inset 0 0 30px -10px rgba(0,229,255,.6);
}
.cube__face--front {transform:translateZ(70px)}
.cube__face--back  {transform:rotateY(180deg) translateZ(70px)}
.cube__face--right {transform:rotateY(90deg)  translateZ(70px)}
.cube__face--left  {transform:rotateY(-90deg) translateZ(70px)}
.cube__face--top   {transform:rotateX(90deg)  translateZ(70px)}
.cube__face--bottom{transform:rotateX(-90deg) translateZ(70px)}

.contact__card{padding:36px;text-align:left}
.contact__card h3{margin:0 0 6px;font-size:1.6rem;letter-spacing:-.5px}
.contact__role{margin:0 0 26px;font-family:var(--mono);font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--dim)}

.contact__mail{
  display:inline-flex;align-items:center;gap:12px;
  padding:14px 20px;border-radius:var(--radius-sm);
  border:1px solid var(--line-strong);
  background:rgba(0,229,255,.06);
  font-family:var(--mono);font-size:clamp(12.5px,2.6vw,15px);
  color:var(--neon);
  word-break:break-all;
  transition:transform .3s var(--ease), box-shadow .3s, background .3s;
}
.contact__mail svg{width:20px;height:20px;flex:none}
.contact__mail:hover{transform:translateY(-3px);background:rgba(0,229,255,.13);box-shadow:var(--glow-cyan)}

.contact__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}

/* ==========================================================================
   To-top / toast
   ========================================================================== */
.to-top{
  position:fixed;right:22px;bottom:22px;z-index:40;
  width:46px;height:46px;border-radius:14px;
  display:grid;place-items:center;
  border:1px solid var(--line-strong);
  background:rgba(8,12,22,.8);
  backdrop-filter:blur(10px);
  color:var(--neon);cursor:pointer;
  opacity:0;visibility:hidden;transform:translateY(14px);
  transition:opacity .35s, visibility .35s, transform .35s var(--ease), box-shadow .3s;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{box-shadow:var(--glow-cyan)}
.to-top svg{width:20px;height:20px}

.toast{
  position:fixed;left:50%;bottom:30px;z-index:150;
  transform:translate(-50%,26px);
  padding:13px 22px;border-radius:99px;
  border:1px solid var(--line-strong);
  background:rgba(8,12,22,.94);
  backdrop-filter:blur(12px);
  font-size:13.5px;font-weight:600;color:var(--neon);
  box-shadow:var(--glow-cyan);
  opacity:0;visibility:hidden;
  transition:opacity .3s, visibility .3s, transform .35s var(--ease);
}
.toast.is-visible{opacity:1;visibility:visible;transform:translate(-50%,0)}

/* ==========================================================================
   Reveal animations
   ========================================================================== */
[data-reveal]{opacity:1;transform:none;transition:opacity .8s var(--ease), transform .8s var(--ease)}
.js [data-reveal]{opacity:0;transform:translateY(26px)}
.js [data-reveal].is-visible{opacity:1;transform:none}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width:1000px){
  .about{grid-template-columns:1fr}
  .contact{grid-template-columns:1fr}
  .contact__cube-wrap{height:210px}
}

@media (max-width:860px){
  .nav__toggle{display:flex}
  .nav__links{
    position:absolute;top:calc(100% + 10px);right:clamp(16px,4vw,44px);left:clamp(16px,4vw,44px);
    flex-direction:column;align-items:stretch;gap:6px;
    padding:16px;
    border-radius:var(--radius);
    border:1px solid var(--line);
    background:rgba(6,10,18,.96);
    backdrop-filter:blur(18px);
    box-shadow:0 30px 60px -30px #000;
    opacity:0;visibility:hidden;transform:translateY(-12px);
    transition:opacity .3s var(--ease), visibility .3s, transform .3s var(--ease);
  }
  .nav__links.is-open{opacity:1;visibility:visible;transform:none}
  .nav__link{padding:13px 16px;border-radius:var(--radius-sm)}

  .carousel__stage{height:400px}
  .panel{width:240px;height:280px;top:-140px;left:-120px}
  .carousel__floor{width:460px}
}

@media (max-width:520px){
  .hero{padding-top:112px}
  .hero__title{letter-spacing:-1px}
  .hero__cta .btn{flex:1 1 100%}
  .cards{grid-template-columns:1fr}
  .card3d{min-height:300px}
  .card3d__inner{min-height:300px}
  .panel{width:214px;height:266px;top:-133px;left:-107px}
  .panel__more{display:none}
  .carousel__stage{height:380px}
  .section__head{margin-bottom:34px}
  .about__card,.contact__card{padding:24px}
}

/* ==========================================================================
   Reduced motion
   ========================================================================== */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  [data-reveal]{opacity:1;transform:none}
}

/* Print */
@media print{
  #bg3d,.bg-fallback,.bg-vignette,.cursor-glow,.boot,.scroll-progress,.to-top,.nav{display:none !important}
  body{background:#fff;color:#000}
}