:root{
  --bg:#0d1117;
  --card:#11161d;
  --text:#e6e6e6;
  --muted:#a9b1bd;
  --accent:#3b82f6; /* глубокий синий */
  --accent-2:#6b7280; /* серый */
  --success:#22c55e;
  --danger:#ef4444;
  --shadow:0 10px 30px rgba(0,0,0,.25);
  --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.nav--open {
  display: flex !important;
  animation: slideDown 0.4s ease-out;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0;scroll-behavior: smooth;}
body{
  font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  color:var(--text);
  background:linear-gradient(180deg,#0a0f14 0%, #0d1117 60%, #0f141a 100%);
  line-height:1.6;
  overflow-x: hidden;
}

/* Containers */
.container{max-width:1180px;margin:0 auto;padding:0 20px}

/* Header */
.header{
  position:sticky;top:0;z-index:1000;
  background:rgba(13,17,23,.7);
  backdrop-filter:blur(8px);
  border-bottom:1px solid rgba(255,255,255,.06);
  transition: var(--transition);
}
.header.scrolled {
  background: rgba(13,17,23,.95);
  box-shadow: 0 5px 20px rgba(0,0,0,0.2);
}
.header__wrap{display:flex;align-items:center;gap:24px;padding:14px 0}
.logo{
  font-family:Montserrat,Inter,sans-serif;
  font-weight:800;font-size:22px;letter-spacing:.5px;
  color:var(--text);text-decoration:none;
  transition: var(--transition);
}
.logo:hover {
  color: var(--accent);
}
.nav{display:flex;gap:18px;flex:1}
.nav a{
  color:var(--muted);text-decoration:none;padding:8px 10px;border-radius:8px;
  transition: var(--transition);
  position: relative;
}
.nav a:hover{color:var(--text);background:rgba(255,255,255,.06)}
.nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: var(--transition);
  transform: translateX(-50%);
}
.nav a:hover::after {
  width: 80%;
}
.burger{display:none;background:none;border:none;cursor:pointer;padding: 5px;border-radius: 4px;transition: var(--transition);}
.burger:hover {background: rgba(255,255,255,.1);}
.burger span{display:block;width:24px;height:2px;background:#fff;margin:5px 0;transition: var(--transition);}
.burger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.burger.active span:nth-child(2) {
  opacity: 0;
}
.burger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* Buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:12px 18px;border-radius:10px;border:1px solid transparent;
  cursor:pointer;transition:var(--transition);font-weight:600;
  position: relative;
  overflow: hidden;
}
.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.7s;
}
.btn:hover::before {
  left: 100%;
}
.btn--primary{
  background:var(--accent);color:#fff;box-shadow:var(--shadow);
}
.btn--primary:hover{
  filter:brightness(1.1);transform:translateY(-2px);
  box-shadow: 0 12px 20px rgba(59, 130, 246, 0.3);
}
.btn--ghost{border-color:rgba(255,255,255,.15);color:#fff;background:transparent}
.btn--ghost:hover{background:rgba(255,255,255,.08); transform: translateY(-1px);}
.btn--full{width:100%}

/* Hero */
.hero{
  position:relative;min-height:72vh;display:flex;align-items:center;
  background:url('assets/hero.jpg') center/cover no-repeat;
  overflow: hidden;
}
.hero__overlay{
  position:absolute;inset:0;background:linear-gradient(180deg,rgba(13,17,23,.6) 0%, rgba(13,17,23,.9) 70%)
}
.hero__texture{
  position:absolute;inset:auto 0 0 0;height:140px;
  background:radial-gradient(120px 40px at 20% 50%, rgba(255,255,255,.08), transparent 60%),
             radial-gradient(120px 40px at 60% 50%, rgba(255,255,255,.08), transparent 60%);
  opacity:.2;pointer-events:none;
  animation: float 6s ease-in-out infinite;
}
.hero__content{position:relative;z-index:1;padding:80px 0}
.hero__content h1{
  font-family:Montserrat,Inter,sans-serif;font-weight:800;font-size:44px;margin:0 0 10px;
  animation: fadeInUp 0.8s ease-out;
}
.hero__content p{
  max-width:700px;color:var(--muted);font-size:18px;
  animation: fadeInUp 0.8s ease-out 0.2s both;
}
.hero__cta{
  display:flex;gap:14px;margin-top:24px;
  animation: fadeInUp 0.8s ease-out 0.4s both;
}
.hero__stats{
  display:flex;gap:28px;margin-top:34px;list-style:none;padding:0;
  animation: fadeInUp 0.8s ease-out 0.6s both;
}
.hero__stats li{
  display:flex;flex-direction:column;gap:4px;
  position: relative;
  padding-left: 20px;
}
.hero__stats li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
}
.hero__stats strong{font-size:20px}
.hero__stats span{color:var(--muted)}

/* Sections */
.section{padding:70px 0}
.section--dark{background:linear-gradient(180deg,#0f141a 0%, #10161e 100%)}
.section--accent{
  background:linear-gradient(180deg,rgba(59,130,246,.1), rgba(59,130,246,.05));
  border-top:1px solid rgba(255,255,255,.06);
  border-bottom:1px solid rgba(255,255,255,.06);
}
.section h2{
  font-family:Montserrat,Inter,sans-serif;font-weight:800;font-size:32px;margin:0 0 26px;
  position: relative;
  display: inline-block;
}
.section h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 60px;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
}

/* Grid */
.grid{display:grid;gap:20px}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
@media (max-width:980px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:640px){
  .grid-4,.grid-3{grid-template-columns:1fr}
}

/* Cards */
.card{
  background:var(--card);border:1px solid rgba(255,255,255,.06);
  border-radius:14px;padding:18px;box-shadow:var(--shadow);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}
.card:hover::before {
  transform: scaleX(1);
}
.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(0,0,0,0.3);
}
.card h3{margin:0 0 8px;font-size:18px}
.card p{margin:0;color:var(--muted)}

/* Services */
.service{
  display:grid;grid-template-columns:200px 1fr;gap:18px;
  background:var(--card);border:1px solid rgba(255,255,255,.06);
  border-radius:16px;overflow:hidden;box-shadow:var(--shadow);
  transition: var(--transition);
}
.service:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(0,0,0,0.3);
}
.service__img{
  min-height:160px;background:#0b0f14 center/cover no-repeat;
  transition: var(--transition);
}
.service:hover .service__img {
  transform: scale(1.05);
}
.service__content{padding:14px}
.service__content h3{margin:0 0 6px}
.list{margin:0 0 10px;padding-left:18px;color:var(--muted)}
.service__desc{color:var(--muted)}
@media (max-width:720px){
  .service{grid-template-columns:1fr}
}

/* Features */
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:24px}
.feature{
  background:rgba(255,255,255,.06);border-radius:12px;padding:16px;
  transition: var(--transition);
}
.feature:hover {
  background: rgba(255,255,255,.1);
  transform: translateY(-3px);
}
.feature h4{margin:0 0 6px}
.feature p{margin:0;color:var(--muted)}
@media (max-width:800px){.features{grid-template-columns:1fr}}

/* Gallery */
.gallery{
  display:grid;grid-template-columns:repeat(4,1fr);gap:12px
}
.gallery__item{
  position:relative;border-radius:12px;overflow:hidden;
  transition: var(--transition);
}
.gallery__item::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(59, 130, 246, 0.1);
  opacity: 0;
  transition: var(--transition);
}
.gallery__item:hover::after {
  opacity: 1;
}
.gallery__item img{width:100%;display:block;transition:transform .35s ease}
.gallery__item:hover img{transform:scale(1.08)}
@media (max-width:980px){.gallery{grid-template-columns:repeat(2,1fr)}}
@media (max-width:520px){.gallery{grid-template-columns:1fr}}

/* Reviews */
.reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.review{
  background:var(--card);border:1px solid rgba(255,255,255,.06);
  border-radius:14px;padding:18px;box-shadow:var(--shadow);
  transition: var(--transition);
  position: relative;
}
.review::before {
  content: '"';
  position: absolute;
  top: 10px;
  right: 15px;
  font-size: 60px;
  color: rgba(59, 130, 246, 0.2);
  font-family: Georgia, serif;
  line-height: 1;
}
.review:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(0,0,0,0.3);
}
.review p{margin:0 0 10px;position: relative;z-index: 1;}
.review__author{color:var(--muted);position: relative;z-index: 1;}
@media (max-width:900px){.reviews{grid-template-columns:1fr 1fr}}
@media (max-width:600px){.reviews{grid-template-columns:1fr}}

/* Accordion */
.accordion__item{
  background:var(--card);border:1px solid rgba(255,255,255,.06);
  border-radius:12px;margin-bottom:10px;overflow:hidden;
  transition: var(--transition);
}
.accordion__item:hover {
  border-color: rgba(255,255,255,.1);
}
.accordion__header{
  width:100%;text-align:left;background:transparent;color:#fff;border:none;
  padding:14px 16px;cursor:pointer;font-weight:600;display:flex;justify-content:space-between;
  transition: var(--transition);
}
.accordion__header:hover {
  background: rgba(255,255,255,.05);
}
.accordion__header::after{content:"+";color:var(--muted);transition: var(--transition);}
.accordion__item.active .accordion__header::after{content:"—";color:var(--accent);transform: rotate(180deg);}
.accordion__content{
  max-height:0;overflow:hidden;transition:max-height .3s ease;padding:0 16px
}
.accordion__item.active .accordion__content{padding:10px 16px;max-height:240px}
.accordion__content p{color:var(--muted);margin:0}

/* Contact */
.contact__wrap{display:grid;grid-template-columns:1fr 420px;gap:24px;align-items:start}
.contact__benefits{margin:14px 0 0;padding-left:18px;color:var(--muted)}
.form{
  background:var(--card);border:1px solid rgba(255,255,255,.06);
  border-radius:16px;padding:18px;box-shadow:var(--shadow);
  transition: var(--transition);
}
.form:hover {
  box-shadow: 0 15px 30px rgba(0,0,0,0.3);
}
.form__row{display:flex;flex-direction:column;margin-bottom:12px}
label{margin-bottom:6px}
input,select,textarea{
  background:#0b0f14;border:1px solid rgba(255,255,255,.12);
  color:#fff;border-radius:10px;padding:10px 12px;outline:none;
  transition: var(--transition);
}
input:focus,select:focus,textarea:focus{
  border-color:var(--accent);
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}
.error{color:var(--danger);min-height:18px;margin-top:6px;font-size:12px}
.form__note{color:var(--muted);font-size:12px;margin-top:8px}
.form__success{
  display:none;margin-top:12px;padding:10px 12px;border-radius:10px;
  background:rgba(34,197,94,.12);color:#a7f3d0;border:1px solid rgba(34,197,94,.3);
  animation: fadeIn 0.5s ease;
}

/* Footer */
.footer{padding:30px 0;border-top:1px solid rgba(255,255,255,.06)}
.footer__wrap{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:20px;align-items:start}
.footer__brand p{color:var(--muted)}
.footer__info ul{list-style:none;padding:0;margin:0}
.footer__nav{display:grid;grid-template-columns:repeat(2,1fr);gap:8px}
.footer__nav a{color:var(--muted);text-decoration:none;transition: var(--transition);}
.footer__nav a:hover{color:#fff;padding-left: 5px;}
.footer__legal{
  display:flex;justify-content:space-between;align-items:center;margin-top:16px;color:var(--muted)
}
.link{color:var(--muted);text-decoration:none;transition: var(--transition);}
.link:hover{color:#fff;}

/* Responsive header */
@media (max-width:860px){
  .nav{
    display:none;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: rgba(13,17,23,0.98);
    backdrop-filter: blur(10px);
    flex-direction: column;
    padding: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    z-index: 999;
  }
  .burger{display:block}
}

/* Animations */
@keyframes fadeInUp{
  from{opacity:0;transform:translateY(20px)}
  to{opacity:1;transform:none}
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes float {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
  100% { transform: translateY(0px); }
}
@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

.section .container{animation:fadeInUp .5s ease}

/* Loading animation */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255,255,255,.3);
  border-radius: 50%;
  border-top-color: #fff;
  animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ===== Адаптив ===== */

/* Планшеты */
@media (max-width: 1024px) {
  .hero__content h1 {
    font-size: 36px;
  }
  .hero__content p {
    font-size: 16px;
  }
  .hero__stats {
    flex-wrap: wrap;
    gap: 16px;
  }
  .footer__wrap {
    grid-template-columns: 1fr 1fr;
    gap: 30px;
  }
}

/* Смартфоны */
@media (max-width: 768px) {
  .header__wrap {
    justify-content: space-between;
  }
  .nav {
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(13,17,23,0.98);
    backdrop-filter: blur(10px);
    padding: 20px;
    display: none;
  }
  .nav a {
    padding: 12px 0;
    font-size: 18px;
    text-align: center;
    border-bottom: 1px solid rgba(255,255,255,0.05);
  }
  .nav a:last-child {
    border-bottom: none;
  }
  .burger {
    display: block;
  }
  .hero__content h1 {
    font-size: 28px;
  }
  .hero__cta {
    flex-direction: column;
    gap: 10px;
  }
  .grid-4, .grid-3 {
    grid-template-columns: 1fr;
  }
  .gallery {
    grid-template-columns: 1fr 1fr;
  }
  .reviews {
    grid-template-columns: 1fr;
  }
  .contact__wrap {
    grid-template-columns: 1fr;
  }
  .footer__wrap {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .footer__legal {
    flex-direction: column;
    gap: 10px;
    text-align: center;
  }
  .section {
    padding: 50px 0;
  }
  .hero__content {
    padding: 60px 0;
  }
}

/* Очень маленькие экраны */
@media (max-width: 480px) {
  .hero__content h1 {
    font-size: 22px;
  }
  .hero__content p {
    font-size: 14px;
  }
  .gallery {
    grid-template-columns: 1fr;
  }
  .btn {
    padding: 4px 10px;
    font-size: 8px;
  }
  .section h2 {
    font-size: 24px;
  }
  .hero__stats {
    flex-direction: column;
    gap: 15px;
  }
  .hero__stats li {
    padding-left: 15px;
  }
  .container {
    padding: 0 15px;
  }
}

/* Ориентация телефона */
@media (max-height: 500px) and (orientation: landscape) {
  .hero {
    min-height: 100vh;
  }
  .nav {
    max-height: 70vh;
    overflow-y: auto;
  }
}