/* ============================================
   Savebook Shared - Layout Styles
   Header, Footer, Navigation, Grid
   ============================================ */

/* ========== HEADER ========== */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  gap: 1rem;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text);
  text-decoration: none;
}

.logo:hover {
  opacity: 1;
  color: var(--accent);
}

.logo svg {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

/* Desktop Navigation */
.nav-desktop {
  display: none;
}

@media (min-width: 768px) {
  .nav-desktop {
    display: flex;
    align-items: center;
    gap: 0.25rem;
  }

  .nav-desktop > ul {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    list-style: none;
    padding: 0;
    margin: 0;
  }

  .nav-desktop > ul > li {
    position: relative;
  }

  .nav-desktop > ul > li > a {
    display: block;
    padding: 0.5rem 1rem;
    color: var(--text);
    font-weight: 500;
    border-radius: var(--radius);
    transition: var(--transition);
  }

  .nav-desktop > ul > li > a:hover {
    background: var(--bg-card);
    color: var(--accent);
  }

  /* Dropdown */
  .nav-desktop .dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 220px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    padding: 0.5rem 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
  }

  .nav-desktop > ul > li:hover .dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-desktop .dropdown a {
    display: block;
    padding: 0.5rem 1rem;
    color: var(--text);
  }

  .nav-desktop .dropdown a:hover {
    background: var(--bg-card);
    color: var(--accent);
  }
}

/* Hamburger Button */
.hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--radius);
  transition: var(--transition);
}

.hamburger:hover {
  background: var(--bg-card);
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

.hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (min-width: 768px) {
  .hamburger {
    display: none;
  }
}

/* Mobile Navigation */
.nav-mobile {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg);
  z-index: 999;
  padding: 5rem 1.5rem 2rem;
  overflow-y: auto;
}

.nav-mobile.active {
  display: block;
}

.nav-mobile > ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-mobile > ul > li {
  border-bottom: 1px solid var(--border);
}

.nav-mobile > ul > li > a {
  display: block;
  padding: 1rem 0;
  color: var(--text);
  font-weight: 500;
  font-size: 1.125rem;
}

.nav-mobile > ul > li > a:hover {
  color: var(--accent);
}

/* Mobile Dropdown */
.mobile-dropdown {
  border-bottom: 1px solid var(--border);
}

.mobile-dropdown > a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
  color: var(--text);
  font-weight: 500;
  font-size: 1.125rem;
  cursor: pointer;
}

.mobile-dropdown > a::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 300;
}

.mobile-dropdown.active > a::after {
  content: '−';
}

.mobile-dropdown-content {
  display: none;
  padding-bottom: 1rem;
}

.mobile-dropdown.active .mobile-dropdown-content {
  display: block;
}

.mobile-dropdown-content a {
  display: block;
  padding: 0.5rem 0;
  color: var(--text-muted);
  font-size: 1rem;
}

.mobile-dropdown-content a:hover {
  color: var(--accent);
}

/* ========== MAIN CONTENT ========== */
.main-content {
  min-height: calc(100vh - 200px);
  padding: 2rem 0;
}

/* ========== FOOTER ========== */
.footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  background: var(--bg);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
  text-align: center;
}

@media (min-width: 768px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.footer-copy {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.footer-legal {
  display: flex;
  gap: 1.5rem;
}

.footer-legal a {
  color: var(--text-muted);
  font-size: 0.875rem;
}

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

/* ========== BREADCRUMB ========== */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 1rem 0;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.breadcrumb a {
  color: var(--text-muted);
}

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

.breadcrumb span {
  color: var(--text-muted);
}