/* ============================================================
   GP Service — Layout
   Header, Footer, Section wrappers, Grid
   ============================================================ */

/* ============================================================
   HEADER
   ============================================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  display: flex;
  align-items: center;
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.header.scrolled {
  background-color: var(--color-bg-overlay);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--color-border);
}

.header__inner {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xl);
}

@media (min-width: 768px) {
  .header__inner {
    padding: 0 var(--space-xl);
  }
}

/* Logo */
.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  flex-shrink: 0;
}

.header__logo-icon {
  width: 36px;
  height: 36px;
}

.header__logo-text {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
}

.header__logo-text span {
  color: var(--color-accent);
}

/* Desktop Navigation */
.header__nav {
  display: none;
}

@media (min-width: 1024px) {
  .header__nav {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
  }
}

.header__nav-link {
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color 0.2s;
  position: relative;
}

.header__nav-link::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width 0.3s ease;
}

.header__nav-link:hover,
.header__nav-link.active {
  color: var(--color-text-primary);
}

.header__nav-link:hover::after,
.header__nav-link.active::after {
  width: 100%;
}

/* Header Right */
.header__right {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.header__phone {
  display: none;
  font-weight: 700;
  color: var(--color-text-primary);
  font-size: var(--font-size-base);
  transition: color 0.2s;
}

.header__phone:hover {
  color: var(--color-accent);
}

@media (min-width: 768px) {
  .header__phone {
    display: block;
  }
}

/* Hamburger */
.header__burger {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  cursor: pointer;
  padding: 0;
  background: none;
  border: none;
  flex-shrink: 0;
}

.header__burger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: 2px;
  transition: var(--transition);
  transform-origin: center;
}

.header__burger.open span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.header__burger.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.header__burger.open span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

@media (min-width: 1024px) {
  .header__burger {
    display: none;
  }
}

/* ============================================================
   MOBILE MENU
   ============================================================ */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 999;
  background-color: var(--color-bg-primary);
  display: flex;
  flex-direction: column;
  padding: calc(var(--header-height) + var(--space-xl)) var(--space-xl) var(--space-xl);
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.mobile-menu.open {
  transform: translateX(0);
}

.mobile-menu__nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
  margin-bottom: auto;
}

.mobile-menu__nav-link {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-text-secondary);
  transition: color 0.2s;
}

.mobile-menu__nav-link:hover {
  color: var(--color-accent);
}

.mobile-menu__contacts {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
}

.mobile-menu__phone {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text-primary);
}

@media (min-width: 1024px) {
  .mobile-menu {
    display: none;
  }
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background-color: var(--color-bg-primary);
  border-top: 1px solid var(--color-border);
  padding: var(--space-3xl) 0 var(--space-xl);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

@media (min-width: 768px) {
  .footer__grid {
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-3xl);
  }
}

.footer__brand p {
  margin-top: var(--space-md);
  font-size: var(--font-size-sm);
  max-width: 280px;
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  margin-bottom: var(--space-md);
}

.footer__logo-text {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text-primary);
}

.footer__logo-text span {
  color: var(--color-accent);
}

.footer__col-title {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--space-lg);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.footer__links a {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  transition: color 0.2s;
}

.footer__links a:hover {
  color: var(--color-accent);
}

.footer__contacts {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.footer__contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  transition: color 0.2s;
}

.footer__contact-item:hover {
  color: var(--color-accent);
}

.footer__contact-item svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--color-accent);
}

.footer__bottom {
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  text-align: center;
}

@media (min-width: 768px) {
  .footer__bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}

.footer__copyright {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.footer__bottom-links {
  display: flex;
  gap: var(--space-lg);
}

.footer__bottom-links a {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  transition: color 0.2s;
}

.footer__bottom-links a:hover {
  color: var(--color-accent);
}

/* ============================================================
   MAIN CONTENT (offset for fixed header)
   ============================================================ */
main {
  padding-top: var(--header-height);
}

/* Hero section is full viewport so no extra offset needed */
.hero {
  padding-top: 0;
  margin-top: calc(-1 * var(--header-height));
}