/* ================================
   HEADER
================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: 32px 0;
}

.header-inner {
  width: 100%;
  min-height: 94px;
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  backdrop-filter: blur(12px);
  background: linear-gradient(
    360deg,
    rgba(243, 248, 253, 0.95) 0%,
    rgba(243, 248, 253, 0.95) 100%
  );
  border: 1px solid #ffffffcc;
  border-radius: 24px;
  box-shadow: 0px 32px 48px 0px #98c7ff30;
}

.brand {
  width: 217px;
}

/* Navigation */

.main-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
}

.main-nav a {
  position: relative;
  color: var(--color-tex);
  font-size: 18px;
  font-weight: 500;
  line-height: 146%;
  transition: var(--transition);
}

.main-nav a::after {
  content: "";
  position: absolute;
  bottom: -8px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transform: translateX(-50%);
  transition: var(--transition);
}

.main-nav a:hover {
  color: var(--color-dark);
}

.main-nav a:hover::after {
  width: 100%;
}

.header-btn {
  min-width: 161px;
  height: 44px;
  padding: 10px 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: 10px;
  font-size: 20px;
  font-weight: 700;
  line-height: 120%;
  letter-spacing: -2%;
  transition: var(--transition);
}

.header-btn:hover {
  background: #0d58df;
}

/* Mobile Menu Button */

.menu-toggle {
  width: 44px;
  height: 44px;
  padding: 9px;
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.menu-toggle span {
  width: 100%;
  height: 2px;
  display: block;
  background: var(--color-dark);
  border-radius: 10px;
  transition: var(--transition);
}

/* ================================
   HEADER RESPONSIVE
================================ */
@media (max-width: 1100px) {
  .main-nav {
    gap: 26px;
  }
  .brand {
    width: 190px;
  }
}
@media (max-width: 900px) {
  .header-inner {
    min-height: 76px;
    padding: 0 18px;
    gap: 10px;
  }

  .brand-name {
    font-size: 40px;
  }

  .main-nav {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    margin: 0;
    padding: 25px;
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
    border-radius: 18px;
    background: var(--color-white);
    box-shadow: 0 15px 40px rgba(15, 28, 79, 0.12);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition);
  }

  .main-nav.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .main-nav a {
    font-size: 17px;
  }

  .header-btn {
    margin-left: auto;
    min-width: 135px;
    height: 40px;
    font-size: 16px;
  }

  .menu-toggle {
    display: flex;
  }
}

@media (max-width: 600px) {
  .site-header {
    padding: 15px 15px 0;
  }
  .brand {
    width: 140px;
  }
  .header-inner {
    min-height: 68px;
    padding: 0 12px 0 15px;
    border-radius: 18px;
  }

  .header-btn {
    display: none;
  }

  .menu-toggle {
    width: 38px;
    height: 38px;
  }
}