/**
 * MangaBTT Main Layout, Typography, Header & Footer
 *
 * @package MangaBTT
 * @since 1.0.0
 */

/* ==========================================================================
   1. Modern Reset & Box Sizing
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--mbtt-font-sans);
  font-size: 16px;
  line-height: var(--mbtt-line-height-body);
  color: var(--mbtt-text);
  background-color: var(--mbtt-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--mbtt-background);
  color: var(--mbtt-text);
}

/* Accessible Skip Link */
.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  background: var(--mbtt-primary);
  color: #ffffff;
  padding: 12px 20px;
  font-weight: 600;
  border-radius: var(--mbtt-radius);
  z-index: 99999;
  text-decoration: none;
  box-shadow: var(--mbtt-shadow-md);
  transition: top 0.2s ease-in-out;
}
.skip-link:focus {
  top: 16px;
  outline: 3px solid var(--mbtt-accent);
  outline-offset: 2px;
}

/* Screen Reader Text */
.screen-reader-text {
  border: 0;
  clip: rect(1px, 1px, 1px, 1px);
  clip-path: inset(50%);
  height: 1px;
  margin: -1px;
  overflow: hidden;
  padding: 0;
  position: absolute !important;
  width: 1px;
  word-wrap: normal !important;
}

/* ==========================================================================
   2. Typography & Semantics
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
  color: var(--mbtt-text);
  font-weight: 700;
  line-height: var(--mbtt-line-height-heading);
  letter-spacing: -0.02em;
}

h1 { font-size: 2.25rem; margin-bottom: 1.25rem; }
h2 { font-size: 1.75rem; margin-top: 2rem; margin-bottom: 1rem; }
h3 { font-size: 1.35rem; margin-top: 1.5rem; margin-bottom: 0.75rem; }
h4 { font-size: 1.125rem; margin-top: 1.25rem; margin-bottom: 0.5rem; }

p {
  margin-bottom: 1.25rem;
  color: var(--mbtt-text-secondary);
}

strong, b {
  font-weight: 600;
  color: var(--mbtt-text);
}

a {
  color: var(--mbtt-primary);
  text-decoration: none;
  transition: color 0.15s ease-in-out;
}
a:hover {
  color: var(--mbtt-accent);
}
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--mbtt-accent);
  outline-offset: 2px;
}

ul, ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
  color: var(--mbtt-text-secondary);
}
li {
  margin-bottom: 0.35rem;
}

img, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

hr {
  border: 0;
  height: 1px;
  background-color: var(--mbtt-border);
  margin: 2rem 0;
}

/* ==========================================================================
   3. Layout Grid & Containers
   ========================================================================== */
.mbtt-container {
  width: 100%;
  max-width: var(--mbtt-container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

.mbtt-container-narrow {
  max-width: var(--mbtt-content-width);
}

.site-main {
  flex: 1 0 auto;
  padding-top: 2rem;
  padding-bottom: 4rem;
}

.site-content-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}

.site-content-layout.has-sidebar {
  grid-template-columns: minmax(0, 1fr) 320px;
}
.site-content-layout.sidebar-left {
  grid-template-columns: 320px minmax(0, 1fr);
}
.site-content-layout.sidebar-left .widget-area {
  order: -1;
}

/* ==========================================================================
   4. Header & Navigation
   ========================================================================== */
.site-header {
  background-color: var(--mbtt-surface);
  border-bottom: 1px solid var(--mbtt-border);
  position: relative;
  z-index: 100;
  transition: box-shadow 0.2s ease-in-out;
}

.site-header.is-sticky {
  position: sticky;
  top: 0;
  box-shadow: var(--mbtt-shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 1.5rem;
}

/* Branding */
.site-branding {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.site-logo-link {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
}
.site-logo-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--mbtt-radius);
  background: linear-gradient(135deg, var(--mbtt-primary) 0%, var(--mbtt-accent) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-weight: 800;
  font-size: 1.1rem;
  box-shadow: 0 2px 4px rgba(30, 64, 175, 0.25);
  flex-shrink: 0;
}
.site-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--mbtt-text);
  letter-spacing: -0.03em;
  margin: 0;
  line-height: 1;
}
.site-title span {
  color: var(--mbtt-accent);
}
.site-tagline {
  font-size: 0.75rem;
  color: var(--mbtt-muted);
  margin: 0;
  line-height: 1;
  display: none;
}

/* Primary Desktop Navigation */
.main-navigation {
  display: flex;
  align-items: center;
}
.mbtt-nav-list {
  display: flex;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 0.5rem;
}
.mbtt-nav-list li a {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 0.85rem;
  font-size: 0.935rem;
  font-weight: 500;
  color: var(--mbtt-text-secondary);
  border-radius: var(--mbtt-radius);
  transition: all 0.15s ease-in-out;
}
.mbtt-nav-list li {
  position: relative;
}
.mbtt-nav-list li a:hover,
.mbtt-nav-list li.current-menu-item > a,
.mbtt-nav-list li.current_page_item > a {
  color: var(--mbtt-primary);
  background-color: var(--mbtt-primary-light);
}

/* Dropdown Sub-menu */
.mbtt-nav-list .sub-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 240px;
  background-color: var(--mbtt-surface);
  border: 1px solid var(--mbtt-border);
  border-radius: var(--mbtt-radius);
  box-shadow: var(--mbtt-shadow-md);
  list-style: none;
  padding: 0.5rem;
  margin: 0.25rem 0 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.mbtt-nav-list li:hover > .sub-menu,
.mbtt-nav-list li:focus-within > .sub-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.mbtt-nav-list .sub-menu li a {
  display: block;
  padding: 0.5rem 0.85rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--mbtt-text-secondary);
  border-radius: var(--mbtt-radius-sm);
  white-space: nowrap;
}
.mbtt-nav-list .sub-menu li a:hover {
  background-color: var(--mbtt-primary-light);
  color: var(--mbtt-primary);
}

/* Header Action Tools */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.header-search-toggle {
  background: transparent;
  border: 1px solid var(--mbtt-border);
  color: var(--mbtt-text-secondary);
  width: 40px;
  height: 40px;
  border-radius: var(--mbtt-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.15s ease-in-out;
}
.header-search-toggle:hover {
  border-color: var(--mbtt-accent);
  color: var(--mbtt-accent);
  background-color: var(--mbtt-background);
}

.header-search-dropdown {
  display: none;
  padding: 1rem 0;
  border-top: 1px solid var(--mbtt-border);
  animation: mbttFadeIn 0.2s ease-in-out;
}
.header-search-dropdown.is-visible {
  display: block;
}

/* Mobile Hamburger Toggle */
.mobile-menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--mbtt-border);
  width: 42px;
  height: 42px;
  border-radius: var(--mbtt-radius);
  cursor: pointer;
  color: var(--mbtt-text);
  align-items: center;
  justify-content: center;
  padding: 0;
}

/* Mobile Off-canvas Navigation Drawer */
.mobile-navigation-drawer {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(2px);
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease-in-out, visibility 0.25s ease-in-out;
}
.mobile-navigation-drawer.is-open {
  opacity: 1;
  visibility: visible;
  display: block;
}
.mobile-drawer-content {
  position: absolute;
  top: 0;
  right: 0;
  width: 300px;
  max-width: 85%;
  height: 100%;
  background-color: var(--mbtt-surface);
  box-shadow: var(--mbtt-shadow-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.25s ease-in-out;
  overflow-y: auto;
}
.mobile-navigation-drawer.is-open .mobile-drawer-content {
  transform: translateX(0);
}
.mobile-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--mbtt-border);
}
.mobile-drawer-close {
  background: transparent;
  border: 0;
  color: var(--mbtt-text-secondary);
  cursor: pointer;
  padding: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--mbtt-radius);
}
.mobile-drawer-close:hover {
  background-color: var(--mbtt-background);
  color: var(--mbtt-text);
}
.mobile-nav-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.mobile-nav-list li a {
  display: block;
  padding: 12px 14px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--mbtt-text);
  border-radius: var(--mbtt-radius);
}
.mobile-nav-list li a:hover,
.mobile-nav-list li.current-menu-item > a {
  background-color: var(--mbtt-primary-light);
  color: var(--mbtt-primary);
}
.mobile-nav-list .sub-menu {
  list-style: none;
  padding-left: 1.25rem;
  margin: 0.25rem 0 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.mobile-nav-list .sub-menu li a {
  font-size: 0.9rem;
  padding: 8px 12px;
  color: var(--mbtt-text-secondary);
  background-color: var(--mbtt-background);
}
.mobile-nav-list .sub-menu li a:hover {
  background-color: var(--mbtt-primary-light);
  color: var(--mbtt-primary);
}

/* ==========================================================================
   5. Footer
   ========================================================================== */
.site-footer {
  background-color: #ffffff;
  border-top: 1px solid var(--mbtt-border);
  margin-top: auto;
  color: var(--mbtt-text-secondary);
  font-size: 0.935rem;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 2.5rem;
  padding-top: 3.5rem;
  padding-bottom: 3.5rem;
}

.footer-brand .site-title {
  margin-bottom: 0.75rem;
}
.footer-brand p {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--mbtt-muted);
  max-width: 320px;
}

.footer-widget-title,
.footer-col-title {
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--mbtt-text);
  margin-bottom: 1.25rem;
}

.footer-nav-list,
.mbtt-footer-nav-list,
.mbtt-legal-nav-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-nav-list li,
.mbtt-footer-nav-list li,
.mbtt-legal-nav-list li {
  margin-bottom: 0.65rem;
}
.footer-nav-list a,
.mbtt-footer-nav-list a,
.mbtt-legal-nav-list a {
  color: var(--mbtt-text-secondary);
  font-size: 0.875rem;
  transition: color 0.15s ease-in-out;
}
.footer-nav-list a:hover,
.mbtt-footer-nav-list a:hover,
.mbtt-legal-nav-list a:hover {
  color: var(--mbtt-primary);
}

.footer-disclaimer-box {
  background-color: var(--mbtt-background);
  border-radius: var(--mbtt-radius);
  padding: 1.25rem 1.5rem;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--mbtt-muted);
  margin-bottom: 2rem;
  border: 1px solid var(--mbtt-border);
}
.footer-disclaimer-box strong {
  color: var(--mbtt-text-secondary);
}

.footer-bottom-bar {
  border-top: 1px solid var(--mbtt-border-light);
  padding: 1.5rem 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.8125rem;
  color: var(--mbtt-muted);
}
.footer-bottom-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.footer-bottom-links a {
  color: var(--mbtt-muted);
}
.footer-bottom-links a:hover {
  color: var(--mbtt-primary);
}