/* =========================================================
   Антон Альбеков — портфолио
   Тёмный нави + белый + тил · техническая эстетика
   ========================================================= */

:root{
  --bg:        #0A0F1E;
  --bg-2:      #0D1426;
  --surface:   #121A2E;
  --ink:       #0A0F1E;
  --txt:       #EDF1F8;
  --muted:     #8B94A9;
  --line:      rgba(237,241,248,.10);
  --line-strong: rgba(237,241,248,.20);
  --accent:    #46C4B0;
  --accent-deep:#2FA08D;
  --cream:     #EDF1F8;

  --font:      "Archivo", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono:      "IBM Plex Mono", ui-monospace, "SFMono-Regular", monospace;

  --pad: clamp(20px, 5vw, 64px);
  --max: 1220px;
}

*{ box-sizing: border-box; margin:0; padding:0; }
html{ scroll-behavior:smooth; }
body{
  font-family: var(--font);
  background: var(--bg);
  color: var(--txt);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img{ display:block; max-width:100%; }
a{ color:inherit; text-decoration:none; }
.mono{ font-family: var(--mono); }

::selection{ background: var(--accent); color: var(--ink); }

/* ---------- NAV ---------- */
.nav{
  position:fixed; inset:0 0 auto 0; z-index:100;
  display:flex; align-items:center; gap:24px;
  padding:14px var(--pad);
  transition: background .3s, box-shadow .3s, border-color .3s;
  border-bottom:1px solid transparent;
}
.nav.is-scrolled{
  background: rgba(10,15,30,.82);
  backdrop-filter: blur(10px);
  border-bottom:1px solid var(--line);
}
.nav__brand{ display:flex; align-items:center; gap:11px; margin-right:auto; }
.nav__logo{ width:34px; height:34px; background:var(--surface); border-radius:9px; padding:4px; object-fit:contain; }
.nav__name{ font-weight:800; font-size:15px; letter-spacing:.02em; text-transform:uppercase; }
.nav__links{ display:flex; gap:26px; }
.nav__links a{
  font-size:14px; font-weight:500; color:var(--muted);
  position:relative; padding:4px 0; transition:color .3s;
}
.nav__links a:hover{ color:var(--txt); }
.nav__links a::after{
  content:""; position:absolute; left:0; bottom:0; height:1px; width:0;
  background:var(--accent); transition:width .25s;
}
.nav__links a:hover::after{ width:100%; }
.nav__cta{
  font-family:var(--mono); font-size:13px; letter-spacing:.04em;
  padding:9px 16px; border:1px solid var(--line-strong); color:var(--txt); text-transform:uppercase;
  transition:background .25s, color .25s, border-color .25s;
}
.nav__cta:hover{ background:var(--accent); color:var(--ink); border-color:var(--accent); }

.nav__burger{ display:none; background:none; border:none; cursor:pointer; width:36px; height:36px; flex-direction:column; justify-content:center; gap:5px; }
.nav__burger span{ display:block; height:2px; width:22px; background:var(--txt); transition:.25s; }

/* ---------- HERO ---------- */
.hero{
  position:relative; min-height:100svh;
  display:flex; align-items:center;
  padding: calc(var(--pad) + 60px) var(--pad) calc(var(--pad) + 40px);
  overflow:hidden; background:var(--ink);
}
.hero__video{
  position:absolute; inset:0; width:100%; height:100%;
  object-fit:cover; z-index:0;
}
.hero__scrim{
  position:absolute; inset:0; z-index:1;
  background:
    linear-gradient(180deg, rgba(7,10,20,.72) 0%, rgba(7,10,20,.38) 42%, rgba(7,10,20,.86) 100%);
}
.hero__grid{
  position:absolute; inset:0; z-index:1; opacity:.14; pointer-events:none;
  background-image:
    linear-gradient(rgba(237,241,248,.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(237,241,248,.12) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at 30% 40%, #000 0%, transparent 75%);
}
.hero__content{ position:relative; z-index:2; max-width:900px; color:var(--txt); }
.hero__eyebrow{
  font-size:13px; letter-spacing:.22em; text-transform:uppercase;
  color:rgba(237,241,248,.75); margin-bottom:22px;
}
.hero__title{
  font-size: clamp(52px, 11vw, 132px);
  font-weight:900; line-height:.94; letter-spacing:-.02em;
  text-transform:uppercase; margin-bottom:26px;
}
.hero__sub{
  font-size: clamp(16px, 2vw, 21px); font-weight:400;
  color:rgba(237,241,248,.82); max-width:580px; margin-bottom:38px;
}
.hero__actions{ display:flex; gap:14px; flex-wrap:wrap; }

.btn{
  display:inline-flex; align-items:center; justify-content:center;
  font-family:var(--mono); font-size:14px; letter-spacing:.05em;
  padding:15px 28px; text-transform:uppercase; cursor:pointer;
  transition:background .25s, color .25s, border-color .25s, transform .25s;
}
.btn:hover{ transform:translateY(-2px); }
.btn--accent{ background:var(--accent); color:var(--ink); }
.btn--accent:hover{ background:var(--accent-deep); color:var(--txt); }
.btn--ghost{ border:1px solid rgba(237,241,248,.55); color:var(--txt); }
.btn--ghost:hover{ background:rgba(237,241,248,.12); }

.hero__scroll{
  position:absolute; left:var(--pad); bottom:34px; z-index:2;
  display:flex; align-items:center; gap:12px; color:rgba(237,241,248,.65);
  font-size:12px; letter-spacing:.16em; text-transform:uppercase;
}
.hero__scroll-line{
  display:block; width:1px; height:44px; background:rgba(237,241,248,.4);
  position:relative; overflow:hidden;
}
.hero__scroll-line::after{
  content:""; position:absolute; top:-50%; left:0; width:100%; height:50%;
  background:var(--accent); animation:drop 1.8s ease-in-out infinite;
}
@keyframes drop{ to{ top:100%; } }

.hero__corner{ position:absolute; z-index:2; width:26px; height:26px; pointer-events:none; }
.hero__corner--tl{ top: calc(var(--pad) + 20px); left: var(--pad); border-top:1px solid rgba(237,241,248,.35); border-left:1px solid rgba(237,241,248,.35); }
.hero__corner--br{ bottom: calc(var(--pad) + 20px); right: var(--pad); border-bottom:1px solid rgba(237,241,248,.35); border-right:1px solid rgba(237,241,248,.35); }

/* ---------- SECTION HEAD ---------- */
.section{ padding: calc(var(--pad)*1.9) var(--pad); background:var(--bg); }
.section--dark{ background:var(--bg-2); }
.section__head{
  display:flex; align-items:baseline; gap:18px;
  max-width:var(--max); margin:0 auto 54px; flex-wrap:wrap;
}
.section__num{ font-size:14px; color:var(--accent); letter-spacing:.1em; }
.section__title{
  font-size: clamp(30px, 4.6vw, 52px); font-weight:800;
  letter-spacing:-.015em; text-transform:uppercase;
}
.section__rule{ flex:1; height:1px; background:var(--line); min-width:40px; align-self:center; }

/* sub-heading inside a section */
.subhead{
  max-width:var(--max); margin:0 auto 22px;
  font-size:15px; letter-spacing:.18em; text-transform:uppercase; color:var(--accent);
  display:flex; align-items:center; gap:16px; font-weight:500;
}
.subhead::after{ content:""; flex:1; height:1px; background:var(--line); }

/* ---------- ABOUT ---------- */
.about{
  max-width:var(--max); margin:0 auto;
  display:grid; grid-template-columns: 400px 1fr; gap:clamp(32px,6vw,80px);
  align-items:start;
}
.about__media{ position:relative; }
.about__media img{
  width:100%; aspect-ratio: 12/13; object-fit:cover;
  border:1px solid var(--line-strong); filter:saturate(.92);
}
.about__stamp{
  position:absolute; right:-10px; bottom:18px;
  background:var(--accent); color:var(--ink);
  font-size:11px; letter-spacing:.18em; text-transform:uppercase;
  padding:7px 12px; font-weight:600;
}
.about__lead{
  font-size: clamp(20px, 2.4vw, 28px); font-weight:600; line-height:1.35;
  margin-bottom:20px; letter-spacing:-.01em;
}
.about__text{ color:var(--muted); font-size:16px; margin-bottom:36px; max-width:62ch; }
.about__facts{
  list-style:none; display:grid; grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--line); border-left:1px solid var(--line);
}
.about__facts li{
  padding:18px 16px; border-right:1px solid var(--line); border-bottom:1px solid var(--line);
  display:flex; flex-direction:column; gap:6px; font-weight:600;
}
.about__facts .mono{ font-size:11px; letter-spacing:.14em; text-transform:uppercase; color:var(--accent); font-weight:500; }

/* ---------- SKILLS ---------- */
.skills{ max-width:var(--max); margin:64px auto 0; }
.skills__title{
  font-size:20px; font-weight:800; text-transform:uppercase; letter-spacing:.02em;
  margin-bottom:22px; display:flex; align-items:center; gap:14px;
}
.skills__title::before{ content:"+"; color:var(--accent); font-family:var(--mono); font-weight:400; }
.skills__list{
  list-style:none; display:grid; grid-template-columns:1fr 1fr;
  border-top:1px solid var(--line);
}
.skills__list li{
  position:relative; padding:15px 14px 15px 26px;
  border-bottom:1px solid var(--line); color:var(--muted); font-size:15px;
}
.skills__list li:nth-child(odd){ border-right:1px solid var(--line); }
.skills__list li::before{
  content:"—"; position:absolute; left:2px; top:15px; color:var(--accent);
  font-family:var(--mono);
}

/* ---------- PAGES (portfolio) ---------- */
.pages{
  max-width:var(--max); margin:0 auto;
  display:grid; grid-template-columns:1fr 1fr; gap:22px;
}
.pages + .subhead{ margin-top:68px; }
.page{
  position:relative; overflow:hidden; cursor:zoom-in;
  background:var(--surface); border:1px solid var(--line);
  transform-style:preserve-3d; will-change:transform;
  transition:border-color .3s, box-shadow .4s;
}
.page img{ width:100%; height:auto; display:block; }
.page:hover{ border-color:var(--line-strong); box-shadow:0 30px 60px -24px rgba(0,0,0,.78); }
.page .glare{
  position:absolute; inset:0; z-index:3; pointer-events:none; opacity:0;
  background:radial-gradient(420px 320px at var(--mx,50%) var(--my,50%), rgba(255,255,255,.16), transparent 70%);
  transition:opacity .3s;
}
.page:hover .glare{ opacity:1; }
.page::after{
  content:"+"; position:absolute; top:12px; right:16px; z-index:2;
  font-family:var(--mono); font-size:20px; color:var(--txt);
  opacity:0; transform:scale(.6); transition:.3s;
}
.page::before{
  content:attr(data-title); position:absolute; left:14px; bottom:12px; z-index:2;
  font-family:var(--mono); font-size:11px; letter-spacing:.14em; text-transform:uppercase;
  color:var(--txt); background:rgba(10,15,30,.78); padding:5px 10px;
  opacity:0; transition:.3s;
}
.page:hover::after{ opacity:1; transform:scale(1); }
.page:hover::before{ opacity:1; }

/* ---------- VIDEO WRAP ---------- */
.video-wrap{
  max-width:var(--max); margin:0 auto;
  display:grid; grid-template-columns:1fr 1fr; gap:clamp(32px,6vw,72px);
  align-items:center;
}
.video-wrap__lead{
  font-size:clamp(19px,2.3vw,26px); font-weight:600; line-height:1.4;
  margin-bottom:34px; letter-spacing:-.01em;
}
.channels{ display:flex; flex-direction:column; gap:0; border-top:1px solid var(--line); }
.channel{
  display:flex; align-items:center; justify-content:space-between; gap:20px;
  padding:18px 4px; border-bottom:1px solid var(--line);
  transition:padding-left .25s, background .25s;
}
.channel:hover{ padding-left:12px; background:rgba(237,241,248,.04); }
.channel__name{ font-size:12px; letter-spacing:.14em; text-transform:uppercase; color:var(--accent); }
.channel__value{ font-weight:600; }
.video-wrap__qrs{
  display:grid; grid-template-columns:1fr 1fr; gap:22px;
}
.qr{
  background:var(--cream); padding:22px; text-align:center;
  border-radius:6px;
}
.qr img{ width:100%; height:auto; border-radius:2px; }
.qr figcaption{ margin-top:14px; font-size:11.5px; letter-spacing:.14em; color:#3A4152; text-transform:uppercase; font-weight:600; }

/* ---------- CONTACT ---------- */
.contact{ max-width:var(--max); margin:0 auto; }
.contact__note{ font-size:13px; letter-spacing:.16em; text-transform:uppercase; color:var(--accent); margin-bottom:18px; }
.contact__phone{
  display:inline-block;
  font-size: clamp(38px, 8vw, 88px); font-weight:900; letter-spacing:-.02em;
  line-height:1; margin-bottom:44px;
}
.contact__phone:hover{ color:var(--accent); }
.contact__links{ display:flex; flex-wrap:wrap; gap:0; border-top:1px solid var(--line); }
.contact__link{
  flex:1 1 220px; padding:22px 6px 22px 0; margin-right:30px;
  display:flex; flex-direction:column; gap:5px; border-bottom:1px solid var(--line);
  font-weight:600; transition:padding-left .25s;
}
.contact__link:hover{ padding-left:10px; color:var(--accent); }
.contact__link .mono{ font-size:11px; letter-spacing:.14em; text-transform:uppercase; color:var(--muted); font-weight:500; }

/* ---------- FOOTER ---------- */
.footer{ background:var(--bg); color:var(--txt); padding:30px var(--pad); border-top:1px solid var(--line); }
.footer__inner{
  max-width:var(--max); margin:0 auto;
  display:flex; align-items:center; justify-content:space-between; gap:20px; flex-wrap:wrap;
}
.footer__brand{ display:flex; align-items:center; gap:11px; font-size:14px; color:var(--muted); }
.footer__brand img{ width:30px; height:30px; }
.footer__meta{ font-size:12px; letter-spacing:.1em; color:var(--muted); }

/* ---------- LIGHTBOX ---------- */
.lightbox{
  position:fixed; inset:0; z-index:200; display:none;
  background:rgba(5,8,16,.97); align-items:center; justify-content:center;
  padding:40px; color:var(--txt);
}
.lightbox.is-open{ display:flex; }
.lightbox__figure{ max-width:min(94vw, 1400px); max-height:88vh; display:flex; flex-direction:column; align-items:center; gap:16px; }
.lightbox__img{ max-width:100%; max-height:78vh; object-fit:contain; box-shadow:0 24px 80px rgba(0,0,0,.6); }
.lightbox__cap{ font-size:12.5px; letter-spacing:.12em; text-transform:uppercase; color:var(--muted); }
.lightbox__close{
  position:absolute; top:22px; right:28px; background:none; border:none; cursor:pointer;
  color:var(--txt); font-size:40px; line-height:1;
}
.lightbox__nav{
  position:absolute; top:50%; transform:translateY(-50%); background:none; border:none; cursor:pointer;
  color:var(--txt); font-size:34px; padding:16px; opacity:.65; transition:opacity .2s;
}
.lightbox__nav:hover{ opacity:1; }
.lightbox__nav--prev{ left:10px; }
.lightbox__nav--next{ right:10px; }

/* ---------- REVEAL ---------- */
.reveal{ opacity:0; transform:translateY(26px); transition:opacity .7s ease, transform .7s ease; }
.reveal.is-visible{ opacity:1; transform:none; }

/* ---------- RESPONSIVE ---------- */
@media (max-width: 960px){
  .about{ grid-template-columns:1fr; }
  .about__media{ max-width:400px; }
  .skills__list{ grid-template-columns:1fr; }
  .skills__list li:nth-child(odd){ border-right:none; }
  .pages{ grid-template-columns:1fr 1fr; gap:14px; }
  .video-wrap{ grid-template-columns:1fr; }
}
@media (max-width: 640px){
  .nav__links{ display:none; }
  .nav__cta{ display:none; }
  .nav__burger{ display:flex; }
  .nav.is-open .nav__links{
    display:flex; flex-direction:column; position:absolute; top:100%; left:0; right:0;
    background:var(--bg); padding:18px var(--pad) 26px; gap:18px; border-bottom:1px solid var(--line);
  }
  .about__facts{ grid-template-columns:repeat(2,1fr); }
  .pages{ grid-template-columns:1fr; }
  .hero__title{ font-size:clamp(46px,15vw,72px); }
  .contact__link{ flex:1 1 100%; margin-right:0; }
  .video-wrap__qrs{ grid-template-columns:1fr 1fr; gap:12px; }
}