/*
 * Responsive Enhancements for OpenJudge Documentation
 * Phase 5: 响应式完善
 *
 * Features:
 * - 统一断点系统
 * - 移动端导航优化
 * - 触摸友好交互
 * - 多设备布局适配
 * - 响应式工具类
 * - 打印样式优化
 */

/* ========================================
   Breakpoint System (CSS Custom Properties)
   ======================================== */

:root {
  /* Breakpoint values (for reference in media queries) */
  /* --breakpoint-xs: 0px;      Mobile portrait */
  /* --breakpoint-sm: 640px;    Mobile landscape */
  /* --breakpoint-md: 768px;    Tablet portrait */
  /* --breakpoint-lg: 1024px;   Tablet landscape / Small desktop */
  /* --breakpoint-xl: 1280px;   Desktop */
  /* --breakpoint-2xl: 1536px;  Large desktop */

  /* Container max-widths */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1536px;

  /* Responsive spacing */
  --spacing-mobile: 1rem;
  --spacing-tablet: 1.5rem;
  --spacing-desktop: 2rem;

  /* Touch target minimum size */
  --touch-target-min: 44px;
}

/* ========================================
   Base Responsive Container
   ======================================== */

.container,
article,
.md-content__inner,
.prose {
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-mobile);
  padding-right: var(--spacing-mobile);
}

@media (min-width: 640px) {
  .container,
  article,
  .md-content__inner,
  .prose {
    padding-left: var(--spacing-tablet);
    padding-right: var(--spacing-tablet);
  }
}

@media (min-width: 1024px) {
  .container,
  article,
  .md-content__inner,
  .prose {
    padding-left: var(--spacing-desktop);
    padding-right: var(--spacing-desktop);
    max-width: var(--container-lg);
  }
}

@media (min-width: 1280px) {
  .container,
  article,
  .md-content__inner,
  .prose {
    max-width: var(--container-xl);
  }
}

/* ========================================
   Mobile First Base Styles (< 640px)
   ======================================== */

/* Typography scaling */
html {
  font-size: 15px;
}

@media (min-width: 640px) {
  html {
    font-size: 16px;
  }
}

/* Mobile layout adjustments */
@media (max-width: 639px) {
  /* Main content full width */
  .md-main__inner,
  main.md-main {
    padding: 0;
  }

  /* Reduce margins on mobile */
  article > *,
  .prose > *,
  .md-typeset > * {
    margin-left: 0;
    margin-right: 0;
  }

  /* Stack grids on mobile */
  .grid,
  .md-grid {
    display: block;
  }

  .grid > *,
  .md-grid > * {
    width: 100%;
    margin-bottom: 1rem;
  }

  /* Hide TOC on mobile */
  .md-sidebar--secondary,
  .toc,
  .table-of-contents {
    display: none;
  }

  /* Full width code blocks */
  pre,
  .highlight,
  .codehilite {
    margin-left: calc(-1 * var(--spacing-mobile));
    margin-right: calc(-1 * var(--spacing-mobile));
    border-radius: 0;
    border-left: none;
    border-right: none;
  }

  pre code {
    padding-left: var(--spacing-mobile);
    padding-right: var(--spacing-mobile);
  }

  /* Full width tables */
  .table-responsive,
  table {
    margin-left: calc(-1 * var(--spacing-mobile));
    margin-right: calc(-1 * var(--spacing-mobile));
    width: calc(100% + 2 * var(--spacing-mobile));
  }

  /* Reduce heading sizes on mobile */
  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.375rem; }
  h3 { font-size: 1.125rem; }
  h4 { font-size: 1rem; }
}

/* ========================================
   Tablet Styles (640px - 1023px)
   ======================================== */

@media (min-width: 640px) and (max-width: 1023px) {
  /* Two column layout for larger tablets */
  .md-main__inner {
    display: flex;
    flex-wrap: wrap;
  }

  /* Sidebar takes full width on tablet portrait */
  .md-sidebar--primary {
    width: 100%;
    max-width: none;
    position: relative;
    height: auto;
    max-height: none;
  }

  /* Content takes full width */
  .md-content {
    width: 100%;
    max-width: none;
  }

  /* Hide secondary sidebar on tablet */
  .md-sidebar--secondary {
    display: none;
  }

  /* Grid adjustments */
  .grid-cols-3,
  .md-grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-cols-4,
  .md-grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ========================================
   Desktop Styles (1024px+)
   ======================================== */

@media (min-width: 1024px) {
  /* Three column layout */
  .md-main__inner {
    display: flex;
  }

  /* Primary sidebar */
  .md-sidebar--primary {
    width: 240px;
    flex-shrink: 0;
  }

  /* Main content */
  .md-content {
    flex: 1;
    min-width: 0;
  }

  /* Secondary sidebar (TOC) */
  .md-sidebar--secondary {
    width: 200px;
    flex-shrink: 0;
    display: block;
  }
}

@media (min-width: 1280px) {
  .md-sidebar--primary {
    width: 280px;
  }

  .md-sidebar--secondary {
    width: 240px;
  }
}

/* ========================================
   Touch Friendly Interactions
   ======================================== */

/* Ensure minimum touch target size */
@media (hover: none) and (pointer: coarse) {
  /* Touch devices */

  a,
  button,
  .btn,
  .button,
  input[type="button"],
  input[type="submit"],
  .md-nav__link,
  .tabbed-labels > label,
  details summary {
    min-height: var(--touch-target-min);
    min-width: var(--touch-target-min);
    padding: 0.75rem 1rem;
  }

  /* Increase tap targets in navigation */
  .md-nav__link,
  nav.sidebar a,
  .nav-sidebar a {
    padding: 0.875rem 1rem;
  }

  /* Larger checkboxes */
  input[type="checkbox"],
  input[type="radio"] {
    width: 1.25rem;
    height: 1.25rem;
  }

  /* Remove hover effects on touch - use active instead */
  .highlight:hover,
  .codehilite:hover,
  pre:hover {
    transform: none;
    box-shadow: var(--rm-shadow-sm);
  }

  .highlight:active,
  .codehilite:active,
  pre:active {
    transform: scale(0.99);
  }

  /* Show copy button always on touch devices */
  .copy-button,
  .md-clipboard,
  button[data-clipboard-target] {
    opacity: 1 !important;
  }

  /* Disable hover lift effects */
  button:hover,
  .button:hover,
  .btn:hover {
    transform: none;
  }

  button:active,
  .button:active,
  .btn:active {
    transform: scale(0.98);
  }
}

/* Hover-capable devices */
@media (hover: hover) and (pointer: fine) {
  /* Enable hover effects */
  .highlight:hover,
  .admonition:hover,
  .workflow ol > li:hover {
    transform: translateY(-2px);
  }
}

/* ========================================
   Mobile Navigation Enhancements
   ======================================== */

/* Mobile menu toggle button */
.mobile-menu-toggle {
  display: none;
  position: fixed;
  bottom: 1.5rem;
  left: 1.5rem;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  background: var(--primary, #3b82f6);
  color: white;
  border: none;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
  cursor: pointer;
  z-index: 1001;
  transition: all 0.2s ease;
}

.mobile-menu-toggle:active {
  transform: scale(0.95);
}

@media (max-width: 767px) {
  .mobile-menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }
}

/* Mobile menu icon */
.mobile-menu-toggle .icon-menu {
  width: 1.25rem;
  height: 1.25rem;
}

.mobile-menu-toggle .icon-close {
  display: none;
  width: 1.25rem;
  height: 1.25rem;
}

.mobile-menu-toggle.active .icon-menu {
  display: none;
}

.mobile-menu-toggle.active .icon-close {
  display: block;
}

/* Mobile sidebar drawer */
@media (max-width: 767px) {
  .md-sidebar--primary,
  nav.sidebar,
  .nav-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 85%;
    max-width: 320px;
    height: 100vh;
    max-height: 100vh;
    background: var(--background, #fff);
    border-right: 1px solid var(--border, #e5e7eb);
    transform: translateX(-100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: 1rem;
    padding-top: 2rem;
  }

  .md-sidebar--primary.open,
  nav.sidebar.open,
  .nav-sidebar.open {
    transform: translateX(0);
  }

  /* Dark mode mobile sidebar */
  .dark .md-sidebar--primary,
  .dark nav.sidebar,
  .dark .md-sidebar--primary {
    background: var(--background, #111827);
    border-right-color: var(--border, #374151);
  }
}

/* Mobile navigation overlay */
.mobile-nav-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 999;
  opacity: 0;
  transition: opacity 0.3s ease;
}

@media (max-width: 767px) {
  .mobile-nav-overlay {
    display: block;
    pointer-events: none;
  }

  .mobile-nav-overlay.visible {
    opacity: 1;
    pointer-events: auto;
  }
}

/* ========================================
   Responsive Images
   ======================================== */

article img,
.prose img,
.md-typeset img {
  max-width: 100%;
  height: auto;
}

/* Full bleed images on mobile */
@media (max-width: 639px) {
  article img.full-bleed,
  .prose img.full-bleed,
  figure.full-bleed img {
    margin-left: calc(-1 * var(--spacing-mobile));
    margin-right: calc(-1 * var(--spacing-mobile));
    max-width: calc(100% + 2 * var(--spacing-mobile));
    width: calc(100% + 2 * var(--spacing-mobile));
    border-radius: 0;
  }
}

/* Image grids */
.image-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

@media (min-width: 640px) {
  .image-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

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

/* ========================================
   Responsive Tables
   ======================================== */

/* Table wrapper for horizontal scroll */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 1.5em 0;
}

/* Scroll shadow indicators */
.table-responsive {
  position: relative;
}

.table-responsive::before,
.table-responsive::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  width: 30px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s ease;
  z-index: 1;
}

.table-responsive::before {
  left: 0;
  background: linear-gradient(to right, var(--background, #fff) 0%, transparent 100%);
}

.table-responsive::after {
  right: 0;
  background: linear-gradient(to left, var(--background, #fff) 0%, transparent 100%);
}

/* Show shadows when scrollable */
.table-responsive.can-scroll-left::before {
  opacity: 1;
}

.table-responsive.can-scroll-right::after {
  opacity: 1;
}

/* Card-style tables on mobile */
@media (max-width: 639px) {
  table.responsive-cards,
  .table-cards table {
    display: block;
  }

  table.responsive-cards thead,
  .table-cards thead {
    display: none;
  }

  table.responsive-cards tbody,
  table.responsive-cards tr,
  .table-cards tbody,
  .table-cards tr {
    display: block;
  }

  table.responsive-cards tr,
  .table-cards tr {
    margin-bottom: 1rem;
    padding: 1rem;
    border: 1px solid var(--border, #e5e7eb);
    border-radius: var(--radius-lg, 0.5rem);
    background: var(--card, #fff);
  }

  table.responsive-cards td,
  .table-cards td {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    border: none;
    border-bottom: 1px solid var(--border, #e5e7eb);
  }

  table.responsive-cards td:last-child,
  .table-cards td:last-child {
    border-bottom: none;
  }

  table.responsive-cards td::before,
  .table-cards td::before {
    content: attr(data-label);
    font-weight: 600;
    color: var(--muted-foreground, #6b7280);
    margin-right: 1rem;
  }
}

/* ========================================
   Responsive Code Blocks
   ======================================== */

@media (max-width: 639px) {
  /* Smaller font on mobile */
  pre code,
  .highlight code,
  code {
    font-size: 0.75rem;
    line-height: 1.6;
  }

  /* Reduce padding */
  pre code,
  .highlight pre code {
    padding: 0.75rem 1rem;
  }

  /* Hide line numbers on very small screens */
  .highlight .linenos,
  .highlight .linenodiv {
    display: none;
  }

  /* Simpler copy button */
  .copy-button,
  .md-clipboard {
    padding: 0.25rem 0.5rem;
    font-size: 0.6875rem;
  }
}

/* ========================================
   Responsive Typography
   ======================================== */

/* Fluid typography scale */
@media (max-width: 639px) {
  article,
  .prose,
  .md-typeset {
    font-size: 0.9375rem;
    line-height: 1.65;
  }

  article h1,
  .prose h1,
  .md-typeset h1 {
    font-size: 1.625rem;
    line-height: 1.2;
  }

  article h2,
  .prose h2,
  .md-typeset h2 {
    font-size: 1.25rem;
    margin-top: 2em;
  }

  article h3,
  .prose h3,
  .md-typeset h3 {
    font-size: 1.0625rem;
  }

  /* Tighter spacing */
  article p,
  .prose p {
    margin-bottom: 1em;
  }

  article ul,
  article ol,
  .prose ul,
  .prose ol {
    padding-left: 1.25rem;
  }
}

/* ========================================
   Responsive Admonitions & Cards
   ======================================== */

@media (max-width: 639px) {
  article .admonition,
  .prose .admonition,
  .md-typeset .admonition,
  article details,
  .prose details {
    margin-left: calc(-1 * var(--spacing-mobile));
    margin-right: calc(-1 * var(--spacing-mobile));
    border-radius: 0;
    border-left: none;
    border-right: none;
    border-top: 3px solid;
    padding: 0.875rem 1rem;
  }

  article .admonition-title,
  .prose .admonition-title,
  article details summary {
    margin: -0.875rem -1rem 0.75rem;
    padding: 0.625rem 1rem;
    font-size: 0.875rem;
  }

  /* Workflow adjustments */
  .workflow ol > li,
  ol.workflow-steps > li {
    padding-left: 2.5rem;
  }

  .workflow ol > li::before,
  ol.workflow-steps > li::before {
    width: 1.5rem;
    height: 1.5rem;
    font-size: 0.75rem;
  }

  .workflow ol > li::after,
  ol.workflow-steps > li::after {
    left: calc(0.75rem - 0.5px);
    top: 1.5rem;
    height: calc(100% - 1.5rem);
  }
}

/* ========================================
   Responsive Tabs
   ======================================== */

@media (max-width: 639px) {
  /* Scrollable tabs on mobile */
  .tabbed-labels,
  .tabbed-set > .tabbed-labels {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
  }

  .tabbed-labels::-webkit-scrollbar {
    display: none;
  }

  .tabbed-labels > label,
  .tabbed-set label {
    flex-shrink: 0;
    padding: 0.5rem 0.875rem;
    font-size: 0.8125rem;
  }
}

/* ========================================
   Responsive Utility Classes
   ======================================== */

/* Hide on specific breakpoints */
@media (max-width: 639px) {
  .hide-mobile,
  .hidden-mobile,
  .sm\:hidden {
    display: none !important;
  }
}

@media (min-width: 640px) and (max-width: 767px) {
  .hide-tablet-portrait,
  .md\:hidden {
    display: none !important;
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .hide-tablet,
  .lg\:hidden {
    display: none !important;
  }
}

@media (min-width: 1024px) {
  .hide-desktop,
  .hidden-desktop,
  .xl\:hidden {
    display: none !important;
  }
}

/* Show on specific breakpoints */
@media (max-width: 639px) {
  .show-mobile,
  .visible-mobile {
    display: block !important;
  }
}

@media (min-width: 640px) {
  .show-mobile,
  .visible-mobile {
    display: none !important;
  }
}

@media (min-width: 1024px) {
  .show-desktop,
  .visible-desktop {
    display: block !important;
  }
}

@media (max-width: 1023px) {
  .show-desktop,
  .visible-desktop {
    display: none !important;
  }
}

/* Text alignment utilities */
@media (max-width: 639px) {
  .text-center-mobile {
    text-align: center;
  }

  .text-left-mobile {
    text-align: left;
  }
}

/* Spacing utilities */
@media (max-width: 639px) {
  .p-mobile-0 { padding: 0 !important; }
  .p-mobile-1 { padding: 0.25rem !important; }
  .p-mobile-2 { padding: 0.5rem !important; }
  .p-mobile-4 { padding: 1rem !important; }

  .m-mobile-0 { margin: 0 !important; }
  .m-mobile-auto { margin: auto !important; }
}

/* ========================================
   Print Styles
   ======================================== */

@media print {
  /* Hide non-essential elements */
  nav,
  .md-sidebar,
  .sidebar,
  .nav-sidebar,
  .toc,
  .table-of-contents,
  .scroll-to-top,
  .mobile-menu-toggle,
  .mobile-nav-overlay,
  .copy-button,
  .md-clipboard,
  footer,
  .md-footer {
    display: none !important;
  }

  /* Full width content */
  .md-content,
  article,
  .prose,
  main {
    width: 100% !important;
    max-width: none !important;
    margin: 0 !important;
    padding: 0 !important;
  }

  /* Print-friendly colors */
  body,
  article,
  .prose,
  .md-typeset {
    color: #000 !important;
    background: #fff !important;
  }

  /* Links show URL */
  a[href]::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
    color: #666;
  }

  /* Don't show URL for internal links */
  a[href^="#"]::after,
  a[href^="/"]::after {
    content: "";
  }

  /* Avoid page breaks in bad places */
  h1, h2, h3, h4, h5, h6 {
    page-break-after: avoid;
  }

  pre, blockquote, table, figure, .admonition {
    page-break-inside: avoid;
  }

  /* Code blocks */
  pre, .highlight {
    border: 1px solid #ccc;
    background: #f5f5f5 !important;
    overflow-x: visible;
    white-space: pre-wrap;
    word-wrap: break-word;
  }

  /* Tables */
  table {
    border-collapse: collapse;
  }

  th, td {
    border: 1px solid #ccc;
    padding: 0.5rem;
  }
}

/* ========================================
   Landscape Orientation Fixes
   ======================================== */

@media (max-height: 500px) and (orientation: landscape) {
  /* Reduce header size on short landscape screens */
  .md-header,
  header {
    padding: 0.5rem 1rem;
  }

  /* Reduce scroll margin for shorter header */
  h1[id], h2[id], h3[id], h4[id], h5[id], h6[id] {
    scroll-margin-top: 50px;
  }

  /* Compact navigation */
  .md-nav__link,
  nav a {
    padding: 0.375rem 0.75rem;
  }
}

/* ========================================
   High DPI / Retina Display
   ======================================== */

@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  /* Thinner borders on retina */
  .highlight,
  pre,
  table,
  .admonition,
  details {
    border-width: 0.5px;
  }
}

/* ========================================
   Dark Mode Responsive Adjustments
   ======================================== */

@media (max-width: 639px) {
  .dark .mobile-nav-overlay,
  .dark .mobile-nav-overlay {
    background: rgba(0, 0, 0, 0.7);
  }

  /* Dark mode scroll shadows */
  .dark .table-responsive::before,
  .dark .table-responsive::before {
    background: linear-gradient(to right, var(--background, #111827) 0%, transparent 100%);
  }

  .dark .table-responsive::after,
  .dark .table-responsive::after {
    background: linear-gradient(to left, var(--background, #111827) 0%, transparent 100%);
  }
}

/* ========================================
   Safe Area Insets (Notch devices)
   ======================================== */

@supports (padding: max(0px)) {
  /* Account for notch on modern phones */
  .md-header,
  header {
    padding-left: max(1rem, env(safe-area-inset-left));
    padding-right: max(1rem, env(safe-area-inset-right));
  }

  .md-sidebar--primary,
  nav.sidebar {
    padding-left: max(1rem, env(safe-area-inset-left));
  }

  .mobile-menu-toggle {
    bottom: max(1.5rem, calc(env(safe-area-inset-bottom) + 0.5rem));
    left: max(1.5rem, calc(env(safe-area-inset-left) + 0.5rem));
  }

  .scroll-to-top {
    bottom: max(2rem, calc(env(safe-area-inset-bottom) + 0.5rem));
    right: max(2rem, calc(env(safe-area-inset-right) + 0.5rem));
  }
}