:root {
  --shell-bg: rgba(8, 15, 32, 0.92);
  --shell-line: rgba(88, 117, 198, 0.34);
  --shell-link: #c8d8f4;
  --shell-link-hover: #f3f8ff;
  --shell-chip: rgba(71, 95, 153, 0.44);
  --shell-btn-line: #3b5f96;
  --shell-btn-bg: linear-gradient(120deg, #3158c7, #5f39d2);
  --shell-footer-bg: linear-gradient(180deg, #071226 0%, #08152b 100%);
}

.header,
.main-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background: var(--shell-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--shell-line);
}

.header .container,
.main-header .container {
  width: min(100%, 1180px);
  margin: 0 auto;
  padding: 0 18px;
}

.header .header__inner,
.main-header .logo-nav-container {
  min-height: 66px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.header .brand,
.main-header .logo {
  color: #f0f5ff;
  text-decoration: none;
}

.header .brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.header .logo {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(120deg, #3158c7, #5f39d2);
  color: #f3f7ff;
}

.header .brand__title {
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #f0f5ff;
}

.header .brand__tag {
  display: block;
  margin-top: -2px;
  font-size: 0.72rem;
  color: #a8b8d6;
}

.header .nav {
  display: flex;
  align-items: center;
  gap: 10px;
}

.header .hamb {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid #3b5f96;
  border-radius: 10px;
  background: rgba(31, 52, 93, 0.55);
  color: #f0f6ff;
}

.header .nav--mobile {
  display: none;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 10px;
  border: 1px solid #2f4a76;
  border-radius: 16px;
  background: linear-gradient(165deg, #111c33 0%, #162743 100%);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
  padding: 10px;
}

.header .nav--mobile.show {
  display: flex;
}

.header .logo,
.main-header .logo h1 {
  color: #f0f5ff;
}

.main-header {
  padding: 10px 0;
}

.main-header .logo {
  display: inline-flex;
  flex-direction: column;
}

.main-header .logo h1 {
  letter-spacing: 0.1em;
  font-size: clamp(1.35rem, 2.8vw, 1.95rem);
  margin: 0;
}

.main-header .tagline {
  color: #a7b9d6;
  font-size: 0.76rem;
}

.main-header .nav-toggle {
  display: none;
}

.main-header .hamburger {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-content: center;
  gap: 4px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
}

.main-header .hamburger span {
  width: 20px;
  height: 2px;
  background: #edf4ff;
  border-radius: 20px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.main-header .main-nav {
  position: absolute;
  left: 0;
  right: 0;
  top: calc(100% + 8px);
  display: grid;
  gap: 6px;
  padding: 10px;
  border-radius: 16px;
  background: rgba(10, 18, 30, 0.97);
  border: 1px solid #23324a;
  box-shadow: 0 24px 56px rgba(0, 0, 0, 0.45);
  opacity: 0;
  transform: translateY(-8px) scale(0.98);
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.main-header .main-nav a {
  padding: 10px 12px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 0.95rem;
}

.main-header .main-nav a i {
  margin-right: 8px;
}

.main-header #nav-toggle:checked ~ .hamburger span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.main-header #nav-toggle:checked ~ .hamburger span:nth-child(2) {
  opacity: 0;
}

.main-header #nav-toggle:checked ~ .hamburger span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.main-header #nav-toggle:checked ~ .main-nav {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0) scale(1);
}

.header .nav__link,
.main-header .main-nav a:not(.btn-login) {
  color: var(--shell-link);
  text-decoration: none;
  padding: 9px 12px;
  border-radius: 10px;
}

.header .nav__link:hover,
.main-header .main-nav a:not(.btn-login):hover,
.header .nav__link.is-active,
.main-header .main-nav a.active {
  color: var(--shell-link-hover);
  background: var(--shell-chip);
  text-decoration: none;
}

.header .nav__btn,
.main-header .btn-login {
  color: #eef4ff;
  text-decoration: none;
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid var(--shell-btn-line);
  background: var(--shell-btn-bg);
  font-weight: 600;
}

.header .nav__btn:hover,
.main-header .btn-login:hover {
  filter: brightness(1.07);
  text-decoration: none;
}

.footer {
  position: relative;
  margin-top: 28px;
  border-top: 1px solid var(--shell-line);
  background: var(--shell-footer-bg);
  border-radius: 0;
}

.footer::before {
  display: none;
  content: none;
}

.footer .f__grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
  gap: 16px;
  padding: 34px 0 20px;
}

.footer .social {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.footer .f__col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 7px;
}

.footer .f__col a {
  display: inline-block;
}

.footer .f__bottom {
  border-top: 1px solid rgba(99, 129, 203, 0.3);
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: space-between;
  align-items: center;
  padding: 14px 0 20px;
}

.footer .f__links {
  display: flex;
  gap: 12px;
}

.footer .f__about h4,
.footer .f__col h5 {
  color: #edf4ff;
  margin: 0 0 10px;
}

.footer .f__about p,
.footer .f__col a,
.footer .f__bottom,
.footer .f__links a {
  color: #b8c9e9;
}

.footer a {
  text-decoration: none !important;
}

.footer a:hover {
  text-decoration: none !important;
}

.footer .f__col a:hover,
.footer .f__links a:hover {
  color: #f4f8ff;
}

.footer .social a {
  border: 1px solid #3a547f;
  background: #132545;
  color: #dce8ff;
}

.footer .social a:hover {
  background: #1f3763;
  color: #ffffff;
}

@media (max-width: 980px) {
  .footer .f__grid {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    padding: 26px 0 14px;
  }

  .footer .f__bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .footer .f__links {
    flex-wrap: wrap;
    gap: 8px 12px;
  }
}

@media (max-width: 900px) {
  .header .nav {
    display: none;
  }

  .header .hamb {
    display: block;
  }
}

@media (max-width: 600px) {
  .footer {
    margin-top: 22px;
    border-radius: 0;
  }

  .footer .container {
    padding-left: 18px;
    padding-right: 18px;
  }

  .footer .f__grid {
    grid-template-columns: 1fr;
    gap: 14px;
    padding: 22px 0 14px;
  }

  .footer .f__about,
  .footer .f__col {
    padding: 16px;
    border: 1px solid rgba(95, 123, 190, 0.24);
    border-radius: 12px;
    background: rgba(8, 24, 52, 0.55);
  }

  .footer .f__grid > :last-child {
    margin-bottom: 0;
  }

  .footer .f__about p {
    margin: 0 0 10px;
  }

  .footer .f__col ul {
    gap: 2px;
  }

  .footer .f__col a {
    display: block;
    padding: 6px 0;
  }

  .footer .f__bottom {
    padding: 14px 0 calc(16px + env(safe-area-inset-bottom));
    gap: 10px;
    border-top-color: rgba(95, 123, 190, 0.28);
  }

  .footer .f__links {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
  }

  .footer .f__links a {
    text-align: center;
    padding: 10px 8px;
    border-radius: 8px;
    border: 1px solid rgba(92, 121, 186, 0.28);
    background: rgba(18, 39, 76, 0.55);
  }

  .footer .social a {
    width: 34px;
    height: 34px;
  }
}