/* =========================================
   Vyom Hans Publications - Layout
   ========================================= */

/* ── Header ── */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: var(--z-sticky);
  background: rgba(67, 110, 238, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(135, 206, 235, 0.25);
  transition: all var(--duration-normal) var(--ease-out);
}

.header.scrolled {
  background: rgba(67, 110, 238, 0.98);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.header__inner {
  max-width: var(--container-2xl);
  margin: 0 auto;
  padding: 0 var(--space-6);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.header__logo-icon {
  width: 40px;
  height: 40px;
  background: var(--gradient-accent);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xl);
  font-weight: var(--weight-black);
  color: var(--color-primary);
  font-family: var(--font-heading);
}

.header__logo-text {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  color: var(--color-white);
}

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

.header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.header__nav-link {
  padding: var(--space-2) var(--space-4);
  color: var(--color-text-on-dark-muted);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-out);
  position: relative;
}

.header__nav-link:hover,
.header__nav-link.active {
  color: var(--color-accent);
  background: rgba(135, 206, 235, 0.15);
}

.header__nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--color-accent);
  border-radius: var(--radius-full);
}

.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.header__search-btn,
.header__cart-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-on-dark);
  transition: all var(--duration-fast) var(--ease-out);
}

.header__search-btn:hover,
.header__cart-btn:hover {
  background: rgba(135, 206, 235, 0.2);
  color: var(--color-accent);
}

.header__cart-btn {
  position: relative;
}

.header__cart-count {
  position: absolute;
  top: 2px;
  right: 2px;
  width: 18px;
  height: 18px;
  background: var(--color-accent);
  color: var(--color-primary);
  font-size: 10px;
  font-weight: var(--weight-bold);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
}

.header__cart-count.hidden {
  display: none;
}

/* ── Mobile Menu Toggle ── */
.header__menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  color: var(--color-white);
}

.header__menu-btn span {
  width: 22px;
  height: 2px;
  background: currentColor;
  border-radius: var(--radius-full);
  transition: all var(--duration-normal) var(--ease-out);
}

.header__menu-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.header__menu-btn.active span:nth-child(2) {
  opacity: 0;
}

.header__menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ── Mobile Nav ── */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-primary);
  z-index: var(--z-overlay);
  padding: var(--space-8);
  overflow-y: auto;
}

.mobile-nav.open {
  display: block;
  animation: fadeIn var(--duration-normal) var(--ease-out);
}

.mobile-nav__link {
  display: block;
  padding: var(--space-4) 0;
  color: var(--color-text-on-dark);
  font-size: var(--text-lg);
  font-weight: var(--weight-medium);
  border-bottom: 1px solid rgba(255,255,255,0.1);
  transition: color var(--duration-fast);
}

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

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@media (max-width: 900px) {
  .header__nav { display: none; }
  .header__menu-btn { display: flex; }
}

/* ── Footer ── */
.footer {
  background: var(--color-primary);
  color: var(--color-text-on-dark);
  padding-top: var(--space-16);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-10);
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.footer__brand p {
  color: var(--color-text-on-dark-muted);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-6);
}

.footer__social {
  display: flex;
  gap: var(--space-3);
}

.footer__social-link {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255,255,255,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-on-dark-muted);
  transition: all var(--duration-fast) var(--ease-out);
  font-size: var(--text-sm);
}

.footer__social-link:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-primary);
}

.footer__heading {
  font-family: var(--font-heading);
  font-size: var(--text-md);
  font-weight: var(--weight-bold);
  color: var(--color-white);
  margin-bottom: var(--space-6);
  position: relative;
}

.footer__heading::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--color-accent);
  border-radius: var(--radius-full);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__link {
  color: var(--color-text-on-dark-muted);
  font-size: var(--text-sm);
  transition: color var(--duration-fast);
}

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

.footer__bottom {
  margin-top: var(--space-12);
  padding: var(--space-6);
  border-top: 1px solid rgba(255,255,255,0.1);
  text-align: center;
  font-size: var(--text-sm);
  color: var(--color-text-on-dark-muted);
}

@media (max-width: 768px) {
  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }
  .footer__brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 480px) {
  .footer__grid {
    grid-template-columns: 1fr;
  }
}

/* ── Page wrapper (for fixed header) ── */
.page-wrapper {
  padding-top: var(--header-height);
}

/* ── Grid Layouts ── */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

.grid-5 {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-6);
}

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(3, 1fr); }
  .grid-5 { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-5 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .grid-2 { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr; }
  .grid-5 { grid-template-columns: 1fr; }
}