/* ============================================================
   VASKEVICH STUDIO — Design System
   BEM methodology | CSS Custom Properties | Light/Dark themes
   ============================================================ */

/* ========== RESET ========== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}

/* ========== THEME TOKENS ========== */
:root{
  /* Dark theme (default) */
  --vs-bg:#0a0a0f;
  --vs-bg-alt:#0e0e16;
  --vs-card:#12121a;
  --vs-card-hover:rgba(99,102,241,.03);
  --vs-accent:#6366f1;
  --vs-accent2:#8b5cf6;
  --vs-accent3:#a78bfa;
  --vs-text:#e2e8f0;
  --vs-muted:#94a3b8;
  --vs-border:#1e1e2e;
  --vs-green:#22c55e;
  --vs-orange:#f59e0b;
  --vs-red:#ef4444;

  /* Glass */
  --vs-glass:rgba(10,10,15,.6);
  --vs-glass-solid:rgba(10,10,15,.82);
  --vs-glass-border:rgba(99,102,241,.08);

  /* Shadows */
  --vs-shadow-sm:0 1px 3px rgba(0,0,0,.3);
  --vs-shadow-md:0 8px 30px rgba(0,0,0,.3);
  --vs-shadow-lg:0 16px 48px rgba(99,102,241,.18);
  --vs-shadow-accent:0 12px 40px rgba(99,102,241,.35);

  /* Hero */
  --vs-hero-glow:rgba(99,102,241,.2);
  --vs-hero-grid:rgba(99,102,241,.04);

  /* Misc */
  --vs-radius:14px;
  --vs-radius-sm:10px;
  --vs-radius-pill:30px;
  --vs-transition:.3s cubic-bezier(.4,0,.2,1);
  --vs-container:1100px;
}

[data-theme="light"]{
  --vs-bg:#f5f5f7;
  --vs-bg-alt:#ebebef;
  --vs-card:#ffffff;
  --vs-card-hover:rgba(99,102,241,.04);
  --vs-accent:#6366f1;
  --vs-accent2:#7c3aed;
  --vs-accent3:#8b5cf6;
  --vs-text:#1a1a2e;
  --vs-muted:#64748b;
  --vs-border:#e2e8f0;
  --vs-green:#16a34a;
  --vs-orange:#d97706;
  --vs-red:#dc2626;

  --vs-glass:rgba(245,245,247,.65);
  --vs-glass-solid:rgba(245,245,247,.88);
  --vs-glass-border:rgba(99,102,241,.12);

  --vs-shadow-sm:0 1px 3px rgba(0,0,0,.06);
  --vs-shadow-md:0 4px 16px rgba(0,0,0,.08);
  --vs-shadow-lg:0 8px 32px rgba(99,102,241,.1);
  --vs-shadow-accent:0 8px 30px rgba(99,102,241,.2);

  --vs-hero-glow:rgba(99,102,241,.1);
  --vs-hero-grid:rgba(99,102,241,.06);
}

/* ========== BASE ========== */
body{
  font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',system-ui,sans-serif;
  background:var(--vs-bg);
  color:var(--vs-text);
  line-height:1.6;
  overflow-x:hidden;
  transition:background var(--vs-transition),color var(--vs-transition);
}
a{color:var(--vs-accent);text-decoration:none}
a:hover{text-decoration:underline}

/* ========== LAYOUT ========== */
.vs-container{max-width:var(--vs-container);margin:0 auto;padding:0 24px}
.vs-section{padding:80px 0;scroll-margin-top:60px}
.vs-section--compact{padding:48px 0}
.vs-section--flush{padding-top:0}

/* ========== TYPOGRAPHY ========== */
.vs-title{font-size:2rem;font-weight:700;margin-bottom:12px}
.vs-title--center{text-align:center}
.vs-subtitle{color:var(--vs-muted);margin-bottom:48px;max-width:600px}
.vs-subtitle--center{text-align:center;margin-left:auto;margin-right:auto}

/* ========== GLASS NAV ========== */
.vs-nav{position:fixed;top:0;left:0;right:0;z-index:100;padding:14px 0;transition:all .4s}
.vs-nav::before{
  content:'';position:absolute;inset:0;
  background:var(--vs-glass-solid);
  backdrop-filter:blur(20px) saturate(1.4);
  -webkit-backdrop-filter:blur(20px) saturate(1.4);
  border-bottom:1px solid var(--vs-glass-border);
  z-index:-1;
  transition:all .4s;
}
.vs-nav--scrolled::before{
  background:var(--vs-glass-solid);
  border-bottom-color:rgba(99,102,241,.15);
  box-shadow:0 8px 32px rgba(0,0,0,.15);
}
.vs-nav__inner{display:flex;justify-content:space-between;align-items:center}
.vs-nav__logo{font-weight:700;font-size:1.05rem;color:var(--vs-text);text-decoration:none;transition:color var(--vs-transition)}
.vs-nav__logo:hover{color:var(--vs-accent);text-decoration:none}
.vs-nav__links{display:flex;gap:24px;align-items:center}
.vs-nav__link{color:var(--vs-muted);font-size:.88rem;transition:color var(--vs-transition);text-decoration:none;position:relative}
.vs-nav__link:hover,.vs-nav__link--active{color:var(--vs-text);text-decoration:none}
.vs-nav__link--active::after{
  content:'';position:absolute;bottom:-6px;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--vs-accent),var(--vs-accent2));border-radius:1px;
}

/* Nav blobs */
.vs-nav__blob{position:absolute;width:120px;height:120px;border-radius:50%;filter:blur(40px);opacity:.15;pointer-events:none;z-index:-2;transition:opacity var(--vs-transition)}
.vs-nav__blob--1{background:var(--vs-accent);animation:vs-blob-1 8s ease-in-out infinite}
.vs-nav__blob--2{background:var(--vs-accent2);animation:vs-blob-2 10s ease-in-out infinite}
.vs-nav__blob--3{background:var(--vs-accent3);animation:vs-blob-3 12s ease-in-out infinite}
[data-theme="light"] .vs-nav__blob{opacity:.06}

@keyframes vs-blob-1{0%,100%{transform:translate(0,0) scale(1)}25%{transform:translate(80px,5px) scale(1.1)}50%{transform:translate(160px,-5px) scale(.9)}75%{transform:translate(80px,8px) scale(1.05)}}
@keyframes vs-blob-2{0%,100%{transform:translate(0,0) scale(1)}33%{transform:translate(-60px,8px) scale(1.15)}66%{transform:translate(-120px,-3px) scale(.85)}}
@keyframes vs-blob-3{0%,100%{transform:translate(0,0) scale(.9)}20%{transform:translate(40px,-6px) scale(1.1)}50%{transform:translate(-30px,4px) scale(.95)}80%{transform:translate(60px,-2px) scale(1.05)}}

/* ========== THEME TOGGLE ========== */
.vs-toggle{position:relative;width:56px;height:28px;cursor:pointer;display:flex;align-items:center;flex-shrink:0}
.vs-toggle__input{display:none}
.vs-toggle__track{
  width:56px;height:28px;border-radius:14px;
  background:var(--vs-border);border:1px solid rgba(99,102,241,.2);
  position:relative;transition:all .4s cubic-bezier(.4,0,.2,1);overflow:hidden;
}
.vs-toggle__input:checked ~ .vs-toggle__track{background:#e2e8f0;border-color:rgba(99,102,241,.3)}
.vs-toggle__thumb{
  position:absolute;top:3px;left:3px;width:22px;height:22px;border-radius:50%;
  background:var(--vs-accent);transition:all .4s cubic-bezier(.4,0,.2,1);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 2px 8px rgba(99,102,241,.4);z-index:1;
}
.vs-toggle__input:checked ~ .vs-toggle__thumb{left:31px;background:var(--vs-accent2);box-shadow:0 2px 8px rgba(124,58,237,.4)}
.vs-toggle__thumb::after{content:'_';color:#fff;font-family:monospace;font-size:14px;font-weight:700;animation:vs-cursor 1s step-end infinite}
@keyframes vs-cursor{0%,100%{opacity:1}50%{opacity:0}}
.vs-toggle__icon{position:absolute;font-size:11px;transition:opacity .3s;line-height:1}
.vs-toggle__icon--moon{right:7px;top:6px;opacity:1}
.vs-toggle__icon--sun{left:7px;top:6px;opacity:.4}
.vs-toggle__input:checked ~ .vs-toggle__track .vs-toggle__icon--moon{opacity:.4}
.vs-toggle__input:checked ~ .vs-toggle__track .vs-toggle__icon--sun{opacity:1}

/* ========== BUTTONS ========== */
.vs-btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:16px 36px;background:linear-gradient(135deg,var(--vs-accent),var(--vs-accent2));
  color:#fff;border-radius:12px;font-weight:600;font-size:1.05rem;
  border:none;cursor:pointer;transition:transform .2s,box-shadow .2s;text-decoration:none;
}
.vs-btn:hover{transform:translateY(-2px);box-shadow:var(--vs-shadow-accent);text-decoration:none}
.vs-btn--outline{background:rgba(255,255,255,.04);border:1px solid var(--vs-border);color:var(--vs-text);backdrop-filter:blur(4px)}
.vs-btn--outline:hover{border-color:var(--vs-accent);box-shadow:var(--vs-shadow-md)}
[data-theme="light"] .vs-btn--outline{background:rgba(0,0,0,.02)}
.vs-btn--sm{padding:12px 24px;font-size:.9rem}
.vs-btn--block{display:block;text-align:center;width:100%}

/* ========== CARDS ========== */
.vs-card{
  background:var(--vs-card);border:1px solid var(--vs-border);border-radius:var(--vs-radius);
  padding:28px;transition:border-color var(--vs-transition),transform var(--vs-transition),box-shadow var(--vs-transition);
}
.vs-card:hover{border-color:var(--vs-accent);transform:translateY(-2px)}
[data-theme="light"] .vs-card{box-shadow:var(--vs-shadow-sm)}
[data-theme="light"] .vs-card:hover{box-shadow:var(--vs-shadow-lg)}

/* ========== BADGE ========== */
.vs-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 20px;border-radius:var(--vs-radius-pill);font-size:.85rem;
}
.vs-badge--accent{background:rgba(99,102,241,.1);border:1px solid rgba(99,102,241,.2);color:var(--vs-accent)}
.vs-badge--green{background:rgba(34,197,94,.08);border:1px solid rgba(34,197,94,.2);color:var(--vs-green)}
.vs-badge__dot{width:8px;height:8px;border-radius:50%;background:currentColor}
.vs-badge__dot--blink{animation:vs-blink 2s ease-in-out infinite}
@keyframes vs-blink{0%,100%{opacity:1}50%{opacity:.3}}

/* ========== GRID ========== */
.vs-grid{display:grid;gap:20px}
.vs-grid--2{grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}
.vs-grid--3{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.vs-grid--4{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.vs-grid--steps{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}

/* ========== EDITION CARD ========== */
.vs-edition{display:flex;flex-direction:column;position:relative}
.vs-edition--popular{border-color:var(--vs-accent)}
.vs-edition--popular::before{
  content:'Популярная';position:absolute;top:-11px;right:20px;
  background:linear-gradient(135deg,var(--vs-accent),var(--vs-accent2));color:#fff;
  font-size:.7rem;font-weight:700;padding:4px 14px;border-radius:20px;text-transform:uppercase;letter-spacing:.05em;
}
.vs-edition__icon{font-size:2rem;margin-bottom:12px}
.vs-edition__name{font-size:1.15rem;font-weight:700;margin-bottom:4px}
.vs-edition__price{color:var(--vs-green);font-weight:700;font-size:1.4rem;margin-bottom:2px}
.vs-edition__note{font-size:.75rem;color:var(--vs-muted);margin-bottom:16px}
.vs-edition__desc{color:var(--vs-muted);font-size:.9rem;margin-bottom:16px}
.vs-edition__features{list-style:none;margin-bottom:20px;flex:1}
.vs-edition__features li{padding:4px 0;font-size:.85rem;display:flex;align-items:flex-start;gap:8px}
.vs-edition__features li::before{content:'';flex-shrink:0;width:6px;height:6px;background:var(--vs-accent);border-radius:50%;margin-top:8px}
.vs-edition__sites{font-size:.8rem;color:var(--vs-muted);padding:10px 0;border-top:1px solid var(--vs-border);margin-bottom:12px}
.vs-edition__btn{
  display:block;text-align:center;padding:12px;
  background:rgba(99,102,241,.08);border:1px solid rgba(99,102,241,.2);border-radius:var(--vs-radius-sm);
  color:var(--vs-accent);font-weight:600;font-size:.9rem;transition:all .2s;text-decoration:none;margin-top:auto;
}
.vs-edition__btn:hover{background:rgba(99,102,241,.15);border-color:var(--vs-accent);text-decoration:none}

/* ========== COMPARE TABLE ========== */
.vs-compare{overflow-x:auto;margin-top:24px}
.vs-compare__table{width:100%;border-collapse:collapse;min-width:700px}
.vs-compare__table th,.vs-compare__table td{padding:10px 12px;text-align:center;border-bottom:1px solid var(--vs-border);font-size:.82rem}
.vs-compare__table th{background:var(--vs-card);color:var(--vs-muted);font-weight:600;text-transform:uppercase;letter-spacing:.03em}
.vs-compare__table th:first-child,.vs-compare__table td:first-child{text-align:left;min-width:200px}
.vs-compare__table td:first-child{color:var(--vs-text);font-weight:500}
.vs-compare__yes{color:var(--vs-green)}
.vs-compare__no{color:#4b5563}
[data-theme="light"] .vs-compare__no{color:#cbd5e1}
.vs-compare__table tr:hover td{background:var(--vs-card-hover)}

/* ========== CTA BLOCK ========== */
.vs-cta{
  background:linear-gradient(135deg,rgba(99,102,241,.1),rgba(139,92,246,.05));
  border:1px solid var(--vs-border);border-radius:20px;padding:48px;text-align:center;
}
[data-theme="light"] .vs-cta{background:linear-gradient(135deg,rgba(99,102,241,.06),rgba(139,92,246,.03))}
.vs-cta__title{font-size:1.8rem;font-weight:700;margin-bottom:12px}
.vs-cta__text{color:var(--vs-muted);margin-bottom:28px}

/* ========== FOOTER ========== */
.vs-footer{padding:40px 0;border-top:1px solid var(--vs-border);text-align:center;color:var(--vs-muted);font-size:.85rem}
.vs-footer a{color:var(--vs-accent)}
.vs-footer__powered{
  display:inline-flex;align-items:center;gap:6px;color:var(--vs-muted);font-size:.8rem;
  margin-top:12px;padding:6px 16px;background:rgba(99,102,241,.05);border:1px solid var(--vs-border);border-radius:20px;
}
.vs-footer__powered a{font-weight:500}

/* ========== PAGE HERO (inner pages) — Premium animated banner ========== */
.vs-page-hero{
  padding:100px 0 56px;text-align:center;position:relative;overflow:hidden;
  min-height:320px;display:flex;align-items:center;
}
/* Animated grid background */
.vs-page-hero::before{
  content:'';position:absolute;inset:0;
  background-image:
    radial-gradient(ellipse 70% 50% at 50% 40%,rgba(99,102,241,.12) 0%,transparent 60%),
    linear-gradient(rgba(99,102,241,.03) 1px,transparent 1px),
    linear-gradient(90deg,rgba(99,102,241,.03) 1px,transparent 1px);
  background-size:100% 100%,40px 40px,40px 40px;
  pointer-events:none;
  animation:vs-hero-grid-drift 20s linear infinite;
}
@keyframes vs-hero-grid-drift{0%{background-position:0 0,0 0,0 0}100%{background-position:0 0,40px 40px,40px 40px}}

/* Floating accent orbs */
.vs-page-hero::after{
  content:'';position:absolute;width:400px;height:400px;border-radius:50%;
  background:radial-gradient(circle,rgba(99,102,241,.08) 0%,rgba(139,92,246,.04) 40%,transparent 70%);
  top:-100px;right:-100px;
  animation:vs-hero-orb 8s ease-in-out infinite alternate;
  pointer-events:none;
}
@keyframes vs-hero-orb{0%{transform:translate(0,0) scale(1)}100%{transform:translate(-40px,30px) scale(1.15)}}

/* Additional floating orb */
.vs-page-hero .vs-container{position:relative;z-index:1}

.vs-page-hero__title{font-size:clamp(1.8rem,4vw,2.8rem);font-weight:800;margin-bottom:16px;position:relative}
.vs-page-hero__title span{background:linear-gradient(135deg,var(--vs-accent),var(--vs-accent2));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.vs-page-hero__desc{color:var(--vs-muted);max-width:700px;margin:0 auto;font-size:1.05rem;position:relative;line-height:1.7}

/* Hero decorative elements */
.vs-page-hero__deco{position:absolute;opacity:.06;pointer-events:none}
.vs-page-hero__deco--left{left:5%;top:30%;width:120px;height:120px;animation:vs-float-1 6s ease-in-out infinite}
.vs-page-hero__deco--right{right:8%;bottom:15%;width:80px;height:80px;animation:vs-float-2 7s ease-in-out infinite}
@keyframes vs-float-1{0%,100%{transform:translateY(0) rotate(0deg)}50%{transform:translateY(-15px) rotate(5deg)}}
@keyframes vs-float-2{0%,100%{transform:translateY(0) rotate(0deg)}50%{transform:translateY(10px) rotate(-5deg)}}

[data-theme="light"] .vs-page-hero::before{
  background-image:
    radial-gradient(ellipse 70% 50% at 50% 40%,rgba(99,102,241,.06) 0%,transparent 60%),
    linear-gradient(rgba(99,102,241,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(99,102,241,.04) 1px,transparent 1px);
}
[data-theme="light"] .vs-page-hero::after{
  background:radial-gradient(circle,rgba(99,102,241,.05) 0%,rgba(139,92,246,.02) 40%,transparent 70%);
}

/* ========== AWWWARDS HOVER EFFECTS ========== */

/* 3D Tilt Card */
.vs-card,.vs-edition,.sv-service,.sv-why-card,.ct-channel{
  transform-style:preserve-3d;will-change:transform;perspective:800px;
}

/* Spotlight glow on hover */
.vs-card::after,.vs-edition::after,.sv-service::after,.ct-channel::after{
  content:'';position:absolute;inset:0;border-radius:inherit;
  opacity:0;transition:opacity .4s;pointer-events:none;
  background:radial-gradient(600px circle at var(--mouse-x,50%) var(--mouse-y,50%),rgba(99,102,241,.07),transparent 40%);
}
.vs-card:hover::after,.vs-edition:hover::after,.sv-service:hover::after,.ct-channel:hover::after{opacity:1}

/* Shine sweep on hover */
.vs-btn::before{
  content:'';position:absolute;top:0;left:-75%;width:50%;height:100%;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.15),transparent);
  transform:skewX(-25deg);transition:none;pointer-events:none;
}
.vs-btn{position:relative;overflow:hidden}
.vs-btn:hover::before{animation:vs-shine .6s ease forwards}
@keyframes vs-shine{to{left:125%}}

/* Glow border on nav links */
.vs-nav__link::before{
  content:'';position:absolute;bottom:-6px;left:50%;width:0;height:2px;
  background:linear-gradient(90deg,var(--vs-accent),var(--vs-accent2));
  border-radius:1px;transition:width .35s cubic-bezier(.4,0,.2,1),left .35s cubic-bezier(.4,0,.2,1);
}
.vs-nav__link:hover::before,.vs-nav__link--active::before{width:100%;left:0}

/* Scale + glow badges */
.vs-badge{transition:transform .3s cubic-bezier(.4,0,.2,1),box-shadow .3s}
.vs-badge:hover{transform:scale(1.05);box-shadow:0 4px 20px rgba(99,102,241,.2)}

/* Tech tags pop */
.sv-stack__tag{transition:all .25s cubic-bezier(.4,0,.2,1)}
.sv-stack__tag:hover{transform:translateY(-3px) scale(1.05);border-color:var(--vs-accent);color:var(--vs-accent);box-shadow:0 6px 20px rgba(99,102,241,.12)}

/* Profile cards slide arrow */
.ct-profile{overflow:hidden}
.ct-profile::after{
  content:'';position:absolute;bottom:0;left:0;width:0;height:2px;
  background:linear-gradient(90deg,var(--vs-accent),var(--vs-accent2));
  transition:width .4s cubic-bezier(.4,0,.2,1);
}
.ct-profile:hover::after{width:100%}

/* FAQ hover accent */
.ct-faq__q{transition:color .2s,padding-left .3s}
.ct-faq__q:hover{padding-left:8px}

/* Process step hover glow */
.sv-step{transition:border-color .3s,box-shadow .3s,transform .3s}
.sv-step:hover{border-color:var(--vs-accent);box-shadow:0 8px 30px rgba(99,102,241,.1);transform:translateY(-4px)}
.sv-step::before{transition:transform .3s,box-shadow .3s}
.sv-step:hover::before{transform:scale(1.1);box-shadow:0 4px 16px rgba(99,102,241,.3)}

/* Service card top bar glow */
.sv-service:hover{box-shadow:0 12px 40px rgba(99,102,241,.1)}

/* CTA pulse glow */
.vs-cta{transition:box-shadow .4s}
.vs-cta:hover{box-shadow:0 0 60px rgba(99,102,241,.08),inset 0 0 30px rgba(99,102,241,.03)}

/* ========== BURGER MENU ========== */
.vs-nav__burger{display:none;flex-direction:column;gap:4px;cursor:pointer;padding:8px;z-index:101;background:none;border:none}
.vs-nav__burger span{display:block;width:22px;height:2px;background:var(--vs-text);border-radius:2px;transition:all .3s}
.vs-nav__burger--open span:nth-child(1){transform:rotate(45deg) translate(4px,4px)}
.vs-nav__burger--open span:nth-child(2){opacity:0}
.vs-nav__burger--open span:nth-child(3){transform:rotate(-45deg) translate(4px,-4px)}

/* ========== RESPONSIVE ========== */
@media(max-width:768px){
  .vs-nav__burger{display:flex}
  .vs-nav__links{
    position:fixed;top:0;right:-100%;width:280px;height:100vh;
    flex-direction:column;gap:0;padding:80px 24px 24px;
    background:var(--vs-glass-solid);backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);
    border-left:1px solid var(--vs-glass-border);
    transition:right .35s cubic-bezier(.4,0,.2,1);z-index:100;
    align-items:stretch;
  }
  .vs-nav__links--open{right:0}
  .vs-nav__overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:99;backdrop-filter:blur(2px);-webkit-backdrop-filter:blur(2px)}
  .vs-nav__overlay--open{display:block}
  .vs-nav__link{font-size:.95rem;padding:14px 0;border-bottom:1px solid var(--vs-border)}
  .vs-nav__link--active::after{bottom:auto;left:auto;right:auto;width:auto;height:auto;top:auto;position:static;display:none}
  .vs-nav__link--active{color:var(--vs-accent);font-weight:600}
  .vs-nav__link::before{display:none}
  .vs-nav__logo{font-size:.95rem}
  .vs-nav__blob{width:80px;height:80px}
  .vs-grid--3{grid-template-columns:1fr}
  .vs-page-hero__title{font-size:1.6rem}
  .vs-toggle{margin-top:16px}
}
@media(max-width:600px){
  .vs-compare__table{font-size:.72rem}
  .vs-compare__table th,.vs-compare__table td{padding:6px 8px}
  .vs-cta{padding:28px 20px}
  .vs-toggle{width:48px;height:24px}
  .vs-toggle__track{width:48px;height:24px;border-radius:12px}
  .vs-toggle__thumb{width:18px;height:18px;top:3px;left:3px}
  .vs-toggle__input:checked ~ .vs-toggle__thumb{left:27px}
}

/* ========== SHARED JS INIT (inline) ========== */
/* Theme + scroll detection — add this script to each page:
<script src="shared.js"></script>
*/