:root {
  --color-primary: #2e3b8f;
  --color-primary-dark: #1e2870;
  --color-secondary: #717ec3;
  --color-bg-alt: #e4e7f0;
  --color-heading: #1a1a2e;
  --color-text: #555;
  --color-border: #b0b8cc;
  --color-white: #fff;
  --color-footer-bg: #0f1329;
  --radius-btn: 60px;
  --radius-card: 20px;
  --radius-sm: 12px;
  --shadow-btn: 0 4px 14px rgba(46, 59, 143, 0.35);
  --shadow-btn-hover: 0 8px 25px rgba(46, 59, 143, 0.45);
  --shadow-card: 0 4px 20px rgba(0,0,0,0.06);
  --shadow-card-hover: 0 12px 40px rgba(0,0,0,0.12);
  --shadow-header: 0 2px 20px rgba(0,0,0,0.06);
  --transition: 0.3s cubic-bezier(.4,0,.2,1);
}

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

body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--color-heading);
  margin-top: 0;
  line-height: 1.25;
}

a { color: var(--color-primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--color-secondary); }
img { max-width: 100%; height: auto; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ============ BUTTONS ============ */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px; border-radius: var(--radius-btn);
  font-size: 15px; font-weight: 600; line-height: 1;
  text-align: center; cursor: pointer; transition: var(--transition);
  border: none; white-space: nowrap;
}
.btn--primary {
  background: var(--color-primary); color: var(--color-white);
  box-shadow: var(--shadow-btn);
}
.btn--primary:hover {
  background: var(--color-primary-dark); color: var(--color-white);
  transform: translateY(-2px); box-shadow: var(--shadow-btn-hover);
}
.btn--outline {
  background: transparent; border: 2px solid var(--color-primary); color: var(--color-primary);
}
.btn--outline:hover {
  background: var(--color-primary); color: var(--color-white);
  transform: translateY(-2px); box-shadow: var(--shadow-btn-hover);
}

/* ============ TOPBAR ============ */
.topbar {
  background: var(--color-primary-dark);
  color: rgba(255,255,255,0.85);
  font-size: 13px;
  padding: 6px 0;
  display: none;
}
.topbar__inner {
  display: flex; align-items: center; justify-content: space-between;
}
.topbar__info {
  display: flex; align-items: center; gap: 20px; flex-wrap: wrap;
}
.topbar__item {
  display: inline-flex; align-items: center; gap: 6px;
}
.topbar__item svg { opacity: 0.7; flex-shrink: 0; }
.topbar__social { display: flex; gap: 8px; }
.topbar__social a {
  display: flex; align-items: center; justify-content: center;
  width: 28px; height: 28px; border-radius: 50%;
  color: rgba(255,255,255,0.7); transition: var(--transition);
}
.topbar__social a:hover {
  background: rgba(255,255,255,0.15); color: var(--color-white);
}

@media (min-width: 992px) { .topbar { display: block; } }

/* ============ HEADER ============ */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-header);
  transition: var(--transition);
}
.header--scrolled {
  box-shadow: 0 4px 30px rgba(0,0,0,0.08);
}
.header__inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 24px; gap: 16px;
}
.header__logo {
  flex-shrink: 0;
  line-height: 0;
}
.header__logo-img {
  height: 48px;
  width: auto;
  max-width: 280px;
}

.header__nav { display: flex; align-items: center; }
.header__menu {
  display: flex; list-style: none; margin: 0; padding: 0; gap: 4px;
}
.header__menu > li > a {
  display: flex; align-items: center; gap: 4px;
  padding: 8px 16px; border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 500;
  color: var(--color-heading); letter-spacing: 0.01em;
  transition: var(--transition);
}
.header__menu > li > a:hover {
  background: var(--color-bg-alt); color: var(--color-primary);
}
.header__menu > li > a svg { transition: transform 0.2s; }
.menu-item-has-children:hover > a svg { transform: rotate(180deg); }

/* Submenu */
.menu-item-has-children { position: relative; }
.submenu {
  position: absolute; top: 100%; left: 0;
  min-width: 240px; background: var(--color-white);
  border-radius: var(--radius-sm);
  box-shadow: 0 12px 40px rgba(0,0,0,0.12);
  padding: 8px; list-style: none; margin: 0;
  opacity: 0; visibility: hidden;
  transform: translateY(8px);
  transition: var(--transition);
  z-index: 50;
}
.menu-item-has-children:hover .submenu {
  opacity: 1; visibility: visible; transform: translateY(0);
}
.submenu li a {
  display: block; padding: 10px 14px;
  border-radius: 8px; font-size: 14px; font-weight: 500;
  color: var(--color-text);
}
.submenu li a:hover { background: var(--color-bg-alt); color: var(--color-primary); }

.header__actions { display: flex; align-items: center; gap: 12px; }
.header__call {
  font-size: 13px; padding: 10px 20px;
}
.header__call svg { width: 16px; height: 16px; }

/* Burger */
.header__burger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer;
  padding: 8px; width: 36px;
}
.header__burger span {
  display: block; width: 100%; height: 2.5px;
  background: var(--color-heading); border-radius: 2px;
  transition: var(--transition);
}
.header__burger.is-active span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.header__burger.is-active span:nth-child(2) { opacity: 0; }
.header__burger.is-active span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

@media (max-width: 991px) {
  .header__nav {
    position: fixed; top: 0; right: -100%; width: 300px; height: 100vh;
    background: var(--color-white); flex-direction: column;
    padding: 80px 24px 24px; box-shadow: -4px 0 30px rgba(0,0,0,0.1);
    transition: right 0.3s; z-index: 99;
  }
  .header__nav--open { right: 0; }
  .header__menu { flex-direction: column; width: 100%; }
  .header__menu > li > a { padding: 12px 16px; font-size: 16px; }
  .submenu { position: static; box-shadow: none; padding-left: 16px; opacity: 1; visibility: visible; transform: none; display: none; }
  .menu-item-has-children:hover .submenu { display: block; }
  .header__burger { display: flex; }
  .header__call span { display: none; }
}

/* ============ HERO ============ */
.hero {
  background: linear-gradient(135deg, var(--color-bg-alt) 0%, #d0d5e6 100%);
  padding: 100px 0 80px; text-align: center;
  position: relative; overflow: hidden;
}
.hero h1 {
  font-size: 44px; margin-bottom: 16px; max-width: 800px; margin-left: auto; margin-right: auto;
}
.hero p {
  font-size: 18px; margin-bottom: 36px; max-width: 600px; margin-left: auto; margin-right: auto;
  color: var(--color-text);
}
.hero__cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

@media (max-width: 768px) {
  .hero { padding: 60px 0 50px; }
  .hero h1 { font-size: 28px; }
}

/* ============ SECTIONS ============ */
.section { padding: 70px 0; }
.section:nth-child(even) { background: var(--color-bg-alt); }
.section h2 {
  font-size: 34px; text-align: center; margin-bottom: 48px;
}

/* ============ CARDS ============ */
.cards {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 28px;
}
.card {
  border: 1.5px solid var(--color-border); border-radius: var(--radius-card);
  padding: 36px; transition: var(--transition);
  box-shadow: var(--shadow-card); background: var(--color-white);
}
.card:hover {
  transform: translateY(-6px); box-shadow: var(--shadow-card-hover);
  border-color: var(--color-secondary);
}
.card h3 { margin-bottom: 12px; font-size: 22px; }
.card p { margin-bottom: 20px; }

/* ============ REGIONS ============ */
.region-links {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 12px;
}
.region-links a {
  display: flex; align-items: center; gap: 10px;
  padding: 18px 22px; border: 1.5px solid var(--color-border);
  border-radius: var(--radius-card); font-weight: 600; font-size: 16px;
  transition: var(--transition); color: var(--color-heading);
  background: var(--color-white);
}
.region-links a::before {
  content: ''; display: inline-block; width: 8px; height: 8px;
  border-radius: 50%; background: var(--color-secondary); flex-shrink: 0;
}
.region-links a:hover {
  background: var(--color-primary); color: var(--color-white);
  border-color: var(--color-primary); transform: translateY(-3px);
  box-shadow: var(--shadow-card-hover);
}
.region-links a:hover::before { background: var(--color-white); }

/* ============ BLOG PREVIEW ============ */
.blog-preview article {
  border: 1.5px solid var(--color-border); border-radius: var(--radius-card);
  padding: 28px; margin-bottom: 20px; transition: var(--transition);
  background: var(--color-white);
}
.blog-preview article:hover {
  transform: translateY(-4px); box-shadow: var(--shadow-card-hover);
  border-color: var(--color-secondary);
}

/* ============ FOOTER ============ */
.footer {
  background: var(--color-footer-bg); color: rgba(255,255,255,0.7);
  padding: 60px 0 0;
  position: relative;
}
.footer::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary), var(--color-primary));
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.4fr 1.2fr;
  gap: 48px; padding-bottom: 40px;
}
@media (max-width: 991px) {
  .footer__grid { grid-template-columns: 1fr 1fr; gap: 36px; }
}
@media (max-width: 600px) {
  .footer__grid { grid-template-columns: 1fr; }
}

.footer__logo {
  display: inline-block; margin-bottom: 16px;
}
.footer__logo-img {
  height: 36px;
  width: auto;
  max-width: 200px;
}
.footer__desc {
  font-size: 14px; line-height: 1.7; margin: 0 0 20px; max-width: 320px;
}

.footer__social { display: flex; gap: 10px; }
.footer__social a {
  display: flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; border-radius: 50%;
  background: rgba(255,255,255,0.06); color: rgba(255,255,255,0.6);
  transition: var(--transition);
}
.footer__social a:hover {
  background: var(--color-primary); color: var(--color-white);
  transform: translateY(-2px);
}

.footer__title {
  color: var(--color-white); font-size: 16px; font-weight: 700;
  margin-bottom: 16px; letter-spacing: 0.02em;
}
.footer__title--mt { margin-top: 28px; }

.footer__list { list-style: none; padding: 0; margin: 0; }
.footer__list li { margin-bottom: 10px; }
.footer__list a {
  color: rgba(255,255,255,0.6); font-size: 14px; transition: var(--transition);
  display: inline-flex; align-items: center; gap: 6px;
}
.footer__list a:hover { color: var(--color-white); padding-left: 4px; }

.footer__list--contacts li {
  display: flex; align-items: center; gap: 10px;
  font-size: 14px; color: rgba(255,255,255,0.6);
}
.footer__list--contacts svg { flex-shrink: 0; opacity: 0.5; }
.footer__list--contacts a { color: rgba(255,255,255,0.6); }
.footer__list--contacts a:hover { color: var(--color-white); padding-left: 0; }

.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 20px 0;
}
.footer__bottom-inner {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 12px;
}
.footer__bottom p { margin: 0; font-size: 13px; color: rgba(255,255,255,0.4); }
.footer__links { display: flex; gap: 20px; }
.footer__links a { font-size: 13px; color: rgba(255,255,255,0.4); }
.footer__links a:hover { color: var(--color-white); }

/* ============ BACK TO TOP ============ */
.back-to-top {
  position: fixed; bottom: 30px; right: 30px;
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--color-primary); color: var(--color-white);
  display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-btn); cursor: pointer;
  opacity: 0; visibility: hidden; transform: translateY(12px);
  transition: var(--transition); z-index: 50;
}
.back-to-top--visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover {
  background: var(--color-primary-dark); transform: translateY(-3px);
  box-shadow: var(--shadow-btn-hover);
}

/* ============ RESPONSIVE ============ */
@media (max-width: 768px) {
  .section { padding: 50px 0; }
  .section h2 { font-size: 26px; margin-bottom: 32px; }
  .cards { grid-template-columns: 1fr; }
  .hero p { font-size: 16px; }
  .footer__bottom-inner { flex-direction: column; text-align: center; }
}