/* =========================================================
   Светлана Вакилова — персональное портфолио (sv.ai3d.art)
   ========================================================= */
:root{
  --ink:#0c1826;
  --ink-2:#122236;
  --ink-3:#1b3047;
  --paper:#ffffff;
  --paper-2:#f5f6f8;
  --paper-3:#eceef2;
  --line:#e4e7ec;
  --text:#141a22;
  --text-soft:#556071;
  --muted:#8a93a1;
  --gold:#bd8b3c;
  --gold-2:#d7a44e;
  --gold-soft:rgba(189,139,60,.12);
  --grad-gold:linear-gradient(135deg,#d7a44e 0%,#bd8b3c 55%,#9a6f2c 100%);
  --grad-ink:linear-gradient(160deg,#152a41 0%,#0a1420 100%);
  --radius:18px;
  --radius-sm:12px;
  --shadow:0 24px 60px -24px rgba(10,20,32,.4);
  --shadow-sm:0 10px 30px -14px rgba(10,20,32,.3);
  --wrap:1180px;
  --font:'Satoshi','Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
  --display:'Cabinet Grotesk','Satoshi',var(--font);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);color:var(--text);background:var(--paper);
  line-height:1.62;-webkit-font-smoothing:antialiased;font-size:16px;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--display);line-height:1.05;font-weight:800;letter-spacing:-.03em;margin:0}
h1{font-size:clamp(2.5rem,6vw,4.6rem)}
h2{font-size:clamp(1.9rem,3.8vw,3rem)}
h3{font-size:clamp(1.4rem,2.6vw,2rem)}
h4{font-size:1.08rem;letter-spacing:-.01em}
p{margin:0}
::selection{background:var(--gold);color:#fff}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 24px}

.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:.74rem;font-weight:700;
  letter-spacing:.24em;text-transform:uppercase;color:var(--gold-2);margin-bottom:16px}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--grad-gold);border-radius:2px}
.eyebrow.dark{color:var(--gold)}
.lead{font-size:clamp(1.02rem,1.4vw,1.2rem);color:var(--text-soft);max-width:64ch;margin-top:14px}

/* ---------- Hero ---------- */
.hero{position:relative;background:var(--grad-ink);color:#eef2f7;overflow:hidden;
  padding:clamp(70px,11vw,130px) 0 clamp(56px,8vw,96px)}
.hero-grid{position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:48px 48px;
  mask-image:radial-gradient(ellipse 75% 65% at 30% 30%,#000 30%,transparent 100%)}
.hero-inner{position:relative;display:grid;grid-template-columns:1fr auto;gap:clamp(32px,6vw,80px);align-items:center}
.hero-text h1{margin:.1em 0 .2em;color:#fff}
.hero-text .eyebrow{color:var(--gold-2)}
.tagline{font-family:var(--display);font-weight:700;font-size:clamp(1.2rem,2.1vw,1.6rem);
  color:#e8c988;max-width:22ch;margin:.2em 0 0;letter-spacing:-.01em}
.companies{display:flex;flex-wrap:wrap;gap:9px;margin-top:30px;max-width:640px}
.company-chip{font-size:.82rem;font-weight:600;padding:8px 15px;border-radius:999px;
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.16);color:#d7dee7;
  backdrop-filter:blur(4px)}
.company-chip.has-logo{display:inline-flex;align-items:center;justify-content:center;
  background:#fff;border-color:transparent;padding:10px 16px;height:44px}
.company-chip.has-logo img{height:22px;width:auto;max-width:120px;object-fit:contain;display:block}
.contacts{display:flex;flex-wrap:wrap;gap:14px 26px;margin-top:32px}
.contact{display:inline-flex;align-items:center;gap:10px;font-weight:600;color:#eef2f7;
  border-bottom:1px solid transparent;transition:.2s}
.contact:hover{color:var(--gold-2);border-color:var(--gold-2)}
.contact .ci{color:var(--gold-2);font-size:1.05rem}

.hero-aside{display:flex;flex-direction:column;align-items:flex-end;gap:18px}
.hero-media{display:flex;gap:16px;align-items:stretch;flex-wrap:wrap;justify-content:flex-end}
.hero-visual{flex-shrink:0}
.hero-photo{width:clamp(220px,26vw,320px);height:auto;border-radius:20px;object-fit:cover;
  box-shadow:var(--shadow);border:1px solid rgba(255,255,255,.12);display:block}
.hero-3d{display:none;width:clamp(200px,24vw,300px);border-radius:20px;overflow:hidden;
  position:relative;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.14);
  box-shadow:var(--shadow);cursor:grab}
.hero-3d:active{cursor:grabbing}
.hero-3d.is-active{display:block}
.hero-3d canvas{display:block;width:100%!important;height:100%!important}
.hero-monogram{width:clamp(180px,22vw,260px);aspect-ratio:1;border-radius:24px;
  display:grid;place-items:center;font-family:var(--display);font-weight:900;
  font-size:clamp(4rem,8vw,6rem);color:#fff;background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.14);letter-spacing:-.04em}
.qr{display:flex;flex-direction:column;align-items:center;gap:6px;background:#fff;
  padding:12px;border-radius:14px}
.qr span{font-size:.72rem;color:var(--text-soft);font-weight:600}

/* ---------- Sections ---------- */
.section{padding:clamp(56px,9vw,120px) 0}
.section-alt{background:var(--paper-2)}
.section-head{margin-bottom:clamp(34px,5vw,56px)}

/* Specialization */
.spec-list{list-style:none;margin:0;padding:0;display:grid;
  grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px}
.spec-item{position:relative;display:flex;align-items:flex-start;gap:16px;
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 24px;font-weight:600;font-size:1.06rem;box-shadow:var(--shadow-sm);
  transition:.25s cubic-bezier(.22,.61,.36,1)}
.section-alt .spec-item{background:#fff}
.spec-item:hover{transform:translateY(-4px);border-color:var(--gold-2)}
.spec-num{font-family:var(--display);font-weight:800;color:var(--gold);font-size:1.4rem;line-height:1}

/* Domains */
.domain{margin-top:clamp(40px,6vw,72px)}
.domain:first-of-type{margin-top:0}
.domain-head{border-bottom:1px solid var(--line);padding-bottom:18px;margin-bottom:28px}
.domain-title{display:flex;align-items:baseline;gap:16px;flex-wrap:wrap}
.domain-num{font-family:var(--display);font-weight:900;font-size:clamp(1.6rem,3vw,2.4rem);
  color:var(--gold);letter-spacing:-.04em}
.domain-title h3{color:var(--ink)}
.domain-period{font-weight:600;color:var(--muted);font-size:.95rem;margin-left:auto}

.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:14px;margin-bottom:28px}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:22px 20px;transition:.25s}
.section:not(.section-alt) .stat{background:var(--paper-2)}
.stat:hover{border-color:var(--gold-2);box-shadow:var(--shadow-sm)}
.stat-value{font-family:var(--display);font-weight:900;font-size:clamp(1.5rem,2.6vw,2rem);
  color:var(--ink);letter-spacing:-.03em;line-height:1.05}
.stat-label{margin-top:8px;color:var(--text-soft);font-size:.92rem;line-height:1.45}

.proj-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:16px}
.proj-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 26px;position:relative;overflow:hidden;transition:.25s cubic-bezier(.22,.61,.36,1)}
.section:not(.section-alt) .proj-card{background:var(--paper-2)}
.proj-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:var(--grad-gold);transform:scaleY(0);transform-origin:top;transition:.3s}
.proj-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:transparent}
.proj-card:hover::before{transform:scaleY(1)}
.proj-card h4{color:var(--ink);margin-bottom:10px}
.proj-card p{color:var(--text-soft);font-size:.96rem}

/* Education */
.edu-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column}
.edu-item{display:flex;gap:26px;padding:24px 0;border-bottom:1px solid var(--line);align-items:baseline}
.edu-item:last-child{border-bottom:none}
.edu-year{font-family:var(--display);font-weight:800;color:var(--gold);font-size:1.3rem;
  min-width:72px;flex-shrink:0}
.edu-body{display:flex;flex-direction:column;gap:4px}
.edu-title{font-weight:700;font-size:1.12rem;color:var(--ink)}
.edu-inst{color:var(--text-soft);font-size:.96rem}

/* About */
.section-dark{background:var(--grad-ink);color:#eef2f7}
.section-dark .eyebrow{color:var(--gold-2)}
.section-dark h2{color:#fff}
.about-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}
.about-card{display:flex;align-items:center;gap:14px;padding:22px 24px;
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);
  border-radius:var(--radius);font-weight:600;font-size:1.05rem}
.about-dot{width:10px;height:10px;border-radius:50%;background:var(--grad-gold);flex-shrink:0}
.about-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:38px}
.btn{display:inline-flex;align-items:center;padding:14px 30px;border-radius:999px;
  font-weight:700;background:var(--grad-gold);color:#1a1205;border:1px solid transparent;
  transition:.25s cubic-bezier(.22,.61,.36,1)}
.btn:hover{transform:translateY(-3px);box-shadow:0 18px 40px -14px rgba(189,139,60,.6)}
.btn-ghost{background:rgba(255,255,255,.06);color:#fff;border-color:rgba(255,255,255,.28)}
.btn-ghost:hover{background:rgba(255,255,255,.16);box-shadow:none}

/* Footer */
.foot{background:var(--ink);color:#9fb0c2;padding:28px 0}
.foot-inner{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;font-size:.9rem}
.foot a:hover{color:var(--gold-2)}

@media (max-width:820px){
  .hero-inner{grid-template-columns:1fr}
  .hero-aside{flex-direction:row;justify-content:flex-start;order:-1}
  .domain-period{margin-left:0;width:100%}
}
@media (max-width:560px){
  .hero-aside{flex-direction:column;align-items:flex-start}
}

/* =========================================================
   Переключатель стиля (виден всегда, верхний левый угол)
   ========================================================= */
.style-switch{position:fixed;top:12px;left:12px;z-index:1200;display:inline-flex;align-items:center;
  gap:6px;padding:5px 10px;border-radius:999px;font-family:var(--font);font-weight:600;font-size:.68rem;
  letter-spacing:.02em;cursor:pointer;background:rgba(255,255,255,.9);color:#111;
  border:1px solid var(--line);box-shadow:var(--shadow-sm);
  transition:transform .18s ease,box-shadow .18s ease;backdrop-filter:blur(6px)}
.style-switch .ss-dot{width:8px;height:8px;border-radius:50%;background:var(--grad-gold);flex-shrink:0}
.style-switch:hover{transform:translateY(-1px);box-shadow:var(--shadow)}
.style-switch:active{transform:translateY(0)}

/* =========================================================
   ВАРИАНТ: НЕОБРУТАЛИЗМ  (html.brutal)
   ========================================================= */
.brutal{
  --nb-ink:#111111;
  --nb-bg:#f4ede0;
  --nb-yellow:#ffd23f;
  --nb-pink:#ff5470;
  --nb-blue:#5d5fef;
  --nb-lime:#c6f24e;
}
.brutal body{background:var(--nb-bg);color:var(--nb-ink)}
.brutal ::selection{background:var(--nb-ink);color:var(--nb-yellow)}
.brutal h1,.brutal h2,.brutal h3{text-transform:uppercase;letter-spacing:-.01em}

/* switch itself */
.brutal .style-switch{background:var(--nb-ink);color:var(--nb-yellow);border:3px solid var(--nb-ink);
  border-radius:0;box-shadow:4px 4px 0 var(--nb-pink)}
.brutal .style-switch:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--nb-pink)}
.brutal .style-switch .ss-dot{background:var(--nb-yellow);border-radius:0}

/* hero */
.brutal .hero{background:var(--nb-yellow);color:var(--nb-ink);border-bottom:4px solid var(--nb-ink)}
.brutal .hero-grid{opacity:.12;mask-image:none;
  background-image:linear-gradient(var(--nb-ink) 2px,transparent 2px),linear-gradient(90deg,var(--nb-ink) 2px,transparent 2px);
  background-size:44px 44px}
.brutal .hero-text h1{color:var(--nb-ink)}
.brutal .hero-text .eyebrow,.brutal .eyebrow{color:var(--nb-ink)}
.brutal .eyebrow::before{background:var(--nb-ink)}
.brutal .tagline{color:var(--nb-ink)}
.brutal .contact{color:var(--nb-ink);background:#fff;border:2px solid var(--nb-ink);border-radius:0;
  padding:8px 14px;box-shadow:3px 3px 0 var(--nb-ink)}
.brutal .contact .ci{color:var(--nb-ink)}
.brutal .contact:hover{color:var(--nb-ink);transform:translate(-2px,-2px);box-shadow:5px 5px 0 var(--nb-ink)}
.brutal .company-chip{background:#fff;color:var(--nb-ink);border:3px solid var(--nb-ink);border-radius:0;
  box-shadow:4px 4px 0 var(--nb-ink);backdrop-filter:none}
.brutal .company-chip.has-logo{background:#fff}
.brutal .hero-photo{border:4px solid var(--nb-ink);border-radius:0;box-shadow:10px 10px 0 var(--nb-ink)}
.brutal .hero-monogram{background:var(--nb-pink);color:var(--nb-ink);border:4px solid var(--nb-ink);
  border-radius:0;box-shadow:10px 10px 0 var(--nb-ink)}
.brutal .qr{border:3px solid var(--nb-ink);border-radius:0;box-shadow:5px 5px 0 var(--nb-ink)}

/* sections */
.brutal .section{background:var(--nb-bg)}
.brutal .section-alt{background:var(--nb-blue)}
.brutal .section-alt .eyebrow,.brutal .section-alt h2{color:#fff}
.brutal .section-alt .eyebrow::before{background:#fff}

/* cards: hard borders + offset shadows, no radius */
.brutal .spec-item,.brutal .stat,.brutal .proj-card,.brutal .about-card{
  background:#fff;color:var(--nb-ink);border:3px solid var(--nb-ink);border-radius:0;
  box-shadow:6px 6px 0 var(--nb-ink)}
.brutal .spec-item:hover,.brutal .proj-card:hover{transform:translate(-3px,-3px);
  box-shadow:9px 9px 0 var(--nb-ink);border-color:var(--nb-ink)}
.brutal .stat:hover{transform:translate(-2px,-2px);box-shadow:8px 8px 0 var(--nb-ink)}
.brutal .section:not(.section-alt) .stat,.brutal .section:not(.section-alt) .proj-card{background:#fff}
.brutal .spec-num,.brutal .stat-value,.brutal .domain-num,.brutal .edu-year,.brutal .proj-card h4{color:var(--nb-ink)}
.brutal .stat-label,.brutal .proj-card p,.brutal .edu-inst{color:#3a3a3a}
.brutal .proj-card::before{width:10px;background:var(--nb-pink);transform:scaleY(1)}
.brutal .proj-card h4{padding-left:6px}

/* domains + education */
.brutal .domain-head{border-bottom:4px solid var(--nb-ink)}
.brutal .domain-title h3{color:var(--nb-ink)}
.brutal .domain-period{color:var(--nb-ink);background:var(--nb-lime);border:2px solid var(--nb-ink);
  padding:2px 10px}
.brutal .edu-item{border-bottom:3px solid var(--nb-ink)}
.brutal .edu-title{color:var(--nb-ink)}

/* about (dark) */
.brutal .section-dark{background:var(--nb-ink)}
.brutal .section-dark h2,.brutal .section-dark .eyebrow{color:var(--nb-yellow)}
.brutal .section-dark .eyebrow::before{background:var(--nb-yellow)}
.brutal .about-card{background:var(--nb-yellow);border-color:var(--nb-yellow);
  box-shadow:6px 6px 0 var(--nb-pink)}
.brutal .about-dot{background:var(--nb-ink);border-radius:0}
.brutal .btn{background:var(--nb-yellow);color:var(--nb-ink);border:3px solid var(--nb-ink);
  border-radius:0;box-shadow:5px 5px 0 var(--nb-ink)}
.brutal .btn:hover{transform:translate(-2px,-2px);box-shadow:7px 7px 0 var(--nb-ink)}
.brutal .btn-ghost{background:#fff;color:var(--nb-ink)}

/* footer */
.brutal .foot{background:var(--nb-ink);color:#fff;border-top:5px solid var(--nb-yellow)}
.brutal .foot a:hover{color:var(--nb-yellow)}

/* =========================================================
   Кредит в футере — почти незаметно, слева внизу
   ========================================================= */
.foot-credit{margin-top:10px}
.foot-credit a{font-size:11px;letter-spacing:.04em;color:currentColor;opacity:.28;
  transition:opacity .2s}
.foot-credit a:hover{opacity:.7}

/* =========================================================
   ВАРИАНТ: NEO GLASS 3D  (html.glass)
   ========================================================= */
.glass-scene{position:fixed;inset:0;z-index:0;display:none;
  background:linear-gradient(135deg,#160e3a 0%,#0d3b52 45%,#5a1140 100%);
  background-size:200% 200%;animation:glassGrad 22s ease infinite}
.glass .glass-scene{display:block}
@keyframes glassGrad{0%{background-position:0% 50%}50%{background-position:100% 50%}100%{background-position:0% 50%}}

.glass body{background:#0d0a24;color:#eef1ff}
.glass header,.glass main,.glass footer{position:relative;z-index:1}
.glass ::selection{background:#7c5cff;color:#fff}

/* glass switch */
.glass .style-switch{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.28);
  box-shadow:0 8px 30px -10px rgba(0,0,0,.5);backdrop-filter:blur(10px) saturate(140%)}
.glass .style-switch .ss-dot{background:linear-gradient(135deg,#7c5cff,#4de1ff)}

/* hero over 3D */
.glass .hero{background:transparent;color:#eef1ff}
.glass .hero-grid{display:none}
.glass .hero-text h1{color:#fff}
.glass .eyebrow,.glass .hero-text .eyebrow{color:#9fe6ff}
.glass .eyebrow::before{background:linear-gradient(135deg,#7c5cff,#4de1ff)}
.glass .tagline{color:#e7d9ff}
.glass .contact{color:#eef1ff;border:1px solid rgba(255,255,255,.22);border-radius:12px;
  padding:8px 14px;background:rgba(255,255,255,.08);backdrop-filter:blur(12px)}
.glass .contact .ci{color:#9fe6ff}
.glass .contact:hover{background:rgba(255,255,255,.18);color:#fff}
.glass .company-chip{background:rgba(255,255,255,.9);border:1px solid rgba(255,255,255,.4)}
.glass .hero-photo{border:1px solid rgba(255,255,255,.35);box-shadow:0 30px 70px -24px rgba(0,0,0,.6)}
.glass .hero-3d{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.3);
  backdrop-filter:blur(6px)}
.glass .qr{background:rgba(255,255,255,.92);border:1px solid rgba(255,255,255,.4)}

/* frosted glass panels */
.glass .section-alt{background:rgba(255,255,255,.04)}
.glass .section-dark{background:rgba(10,8,30,.55);backdrop-filter:blur(10px)}
.glass .section-head .eyebrow,.glass .eyebrow.dark{color:#9fe6ff}
.glass h2,.glass h3,.glass .domain-title h3{color:#fff}
.glass .lead,.glass .stat-label,.glass .proj-card p,.glass .edu-inst{color:#c3c9ee}

.glass .spec-item,.glass .stat,.glass .proj-card,.glass .about-card{
  background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.18);
  border-radius:18px;box-shadow:0 20px 50px -26px rgba(0,0,0,.55);
  backdrop-filter:blur(16px) saturate(140%);-webkit-backdrop-filter:blur(16px) saturate(140%);color:#eef1ff}
.glass .section:not(.section-alt) .stat,.glass .section:not(.section-alt) .proj-card{background:rgba(255,255,255,.09)}
.glass .spec-item:hover,.glass .proj-card:hover{transform:translateY(-4px);
  border-color:rgba(159,230,255,.5);box-shadow:0 30px 60px -26px rgba(76,225,255,.4)}
.glass .stat:hover{border-color:rgba(159,230,255,.5)}
.glass .spec-num,.glass .stat-value,.glass .domain-num,.glass .edu-year,.glass .proj-card h4,.glass .edu-title{color:#fff}
.glass .stat-value{background:linear-gradient(135deg,#9fe6ff,#c6b3ff);-webkit-background-clip:text;
  background-clip:text;-webkit-text-fill-color:transparent}
.glass .proj-card::before{background:linear-gradient(180deg,#7c5cff,#4de1ff)}
.glass .domain-head{border-bottom:1px solid rgba(255,255,255,.18)}
.glass .domain-period{color:#9fe6ff}
.glass .edu-item{border-bottom:1px solid rgba(255,255,255,.14)}

.glass .section-dark h2,.glass .section-dark .eyebrow{color:#9fe6ff}
.glass .about-card{background:rgba(255,255,255,.1)}
.glass .about-dot{background:linear-gradient(135deg,#7c5cff,#4de1ff)}
.glass .btn{background:linear-gradient(135deg,#7c5cff,#4de1ff);color:#0d0a24;border:none;
  box-shadow:0 18px 40px -14px rgba(124,92,255,.6)}
.glass .btn-ghost{background:rgba(255,255,255,.1);color:#fff;border:1px solid rgba(255,255,255,.3)}
.glass .foot{background:rgba(10,8,30,.6);color:#c3c9ee;backdrop-filter:blur(10px);
  border-top:1px solid rgba(255,255,255,.12)}