/* ============================================
   Modern Academic-Style CSS for HTML5 Elements
   Friendly design with color accents - FIXED FOR PDF
   ============================================ */

/* Base Document Styles */
:root {
  --font-primary: 'Segoe UI', 'Lato', 'Helvetica Neue', Arial, sans-serif;
  --font-serif: 'Georgia', 'Cambria', 'Times New Roman', serif;
  --font-mono: 'Consolas', 'Monaco', 'Courier New', monospace;
  
  /* Color Palette - Professional but friendly */
  --color-primary: #2563eb; /* Vibrant blue */
  --color-secondary: #7c3aed; /* Purple accent */
  --color-accent: #0891b2; /* Teal */
  --color-text: #1f2937; /* Dark gray, softer than black */
  --color-text-light: #4b5563; /* Medium gray */
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc; /* Light blue-gray */
  --color-border: #cbd5e1; /* Soft gray border */
  --color-highlight: #fef3c7; /* Warm yellow highlight */
  --color-success: #10b981; /* Green */
  --color-code-bg: #f1f5f9; /* Light blue-gray */
}

* {
  box-sizing: border-box;
}

html {
  font-size: 11pt;
  line-height: 1.7;
}

body {
  font-family: var(--font-primary);
  color: var(--color-text);
  background-color: var(--color-bg);
  max-width: 70%; /* Wide desktop width */
  margin: 0 auto;
  padding: 2rem 3rem;
  text-align: left;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Sectioning Content */
article, aside, section {
  margin-bottom: 2em;
}

nav {
  margin-bottom: 1.5em;
  padding: 1em;
  background-color: var(--color-bg-alt);
  border-radius: 8px;
}

header {
  text-align: center;
  margin-bottom: 3em;
  padding-bottom: 1.5em;
  border-bottom: 3px solid var(--color-primary);
}

footer {
  margin-top: 3em;
  padding-top: 1.5em;
  border-top: 2px solid var(--color-border);
  font-size: 0.9em;
  text-align: center;
  color: var(--color-text-light);
}

main {
  display: block;
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  font-weight: 700;
  line-height: 1.3;
  margin-top: 1.8em;
  margin-bottom: 0.8em;
  page-break-after: avoid;
  break-after: avoid-page;
  color: var(--color-primary);
}

h1 {
  font-size: 2.2em;
  text-align: center;
  margin-top: 0;
  color: var(--color-text);
  font-weight: 800;
}

h2 {
  font-size: 1.75em;
  border-left: 4px solid var(--color-primary);
  padding-left: 0.75em;
  color: var(--color-primary);
}

h3 {
  font-size: 1.4em;
  color: var(--color-secondary);
}

h4 {
  font-size: 1.15em;
  color: var(--color-accent);
}

h5 {
  font-size: 1em;
  font-weight: 600;
  color: var(--color-text);
}

h6 {
  font-size: 1em;
  font-weight: 600;
  font-style: italic;
  color: var(--color-text-light);
}

/* Text Content */
p {
  margin: 0 0 1.2em 0;
  orphans: 3;
  widows: 3;
}

hr {
  border: none;
  border-top: 2px solid var(--color-border);
  margin: 2.5em 0;
  background: linear-gradient(to right, var(--color-primary), var(--color-secondary));
  height: 2px;
}

pre {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background-color: var(--color-code-bg);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  padding: 1.2em;
  overflow-x: auto;
  border-radius: 6px;
  margin: 1.5em 0;
  page-break-inside: avoid;
  line-height: 1.5;
}

blockquote {
  margin: 1.5em 0;
  padding: 1em 1.5em;
  border-left: 4px solid var(--color-secondary);
  background-color: var(--color-bg-alt);
  border-radius: 0 6px 6px 0;
  font-style: italic;
  color: var(--color-text-light);
}

blockquote p:last-child {
  margin-bottom: 0;
}

/* Lists */
ol, ul {
  margin: 0.75em 0 1.5em 0;
  padding-left: 2em;
}

ol ol, ol ul, ul ol, ul ul {
  margin: 0.5em 0;
}

li {
  margin: 0.4em 0;
  line-height: 1.6;
}

li::marker {
  color: var(--color-primary);
  font-weight: 600;
}

dl {
  margin: 1.5em 0;
}

dt {
  font-weight: 700;
  color: var(--color-primary);
  margin-top: 1em;
}

dd {
  margin-left: 2em;
  margin-bottom: 0.75em;
  color: var(--color-text-light);
}

/* Inline Text Semantics */
a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s ease;
}

a:hover {
  border-bottom-color: var(--color-primary);
}

abbr[title] {
  border-bottom: 2px dotted var(--color-accent);
  text-decoration: none;
  cursor: help;
}

b, strong {
  font-weight: 700;
  color: var(--color-text);
}

i, em, cite, dfn {
  font-style: italic;
  color: var(--color-text-light);
}

mark {
  background-color: var(--color-highlight);
  color: var(--color-text);
  padding: 0.15em 0.4em;
  border-radius: 3px;
}

small {
  font-size: 0.875em;
  color: var(--color-text-light);
}

sub, sup {
  font-size: 0.75em;
  line-height: 0;
  position: relative;
  vertical-align: baseline;
}

sub {
  bottom: -0.25em;
}

sup {
  top: -0.5em;
}

code, kbd, samp, var {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background-color: var(--color-code-bg);
  color: var(--color-secondary);
  padding: 0.2em 0.4em;
  border-radius: 4px;
  border: 1px solid var(--color-border);
}

pre code, pre kbd, pre samp, pre var {
  background: none;
  border: none;
  padding: 0;
  border-radius: 0;
  font-size: inherit;
  color: inherit;
}

s, del {
  text-decoration: line-through;
  color: var(--color-text-light);
}

ins, u {
  text-decoration: underline;
  text-decoration-color: var(--color-accent);
  text-decoration-thickness: 2px;
}

q {
  font-style: italic;
  color: var(--color-text-light);
  quotes: """ """ "'" "'";
}

q::before {
  content: open-quote;
  color: var(--color-primary);
}

q::after {
  content: close-quote;
  color: var(--color-primary);
}

/* Tables */
table {
  border-collapse: collapse;
  width: 100%;
  margin: 2em 0;
  page-break-inside: avoid;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

caption {
  font-weight: 700;
  text-align: left;
  margin-bottom: 1em;
  caption-side: top;
  color: var(--color-primary);
  font-size: 1.1em;
}

thead {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: white;
}

tbody tr {
  border-bottom: 1px solid var(--color-border);
  transition: background-color 0.2s ease;
}

tbody tr:nth-child(even) {
  background-color: var(--color-bg-alt);
}

tbody tr:hover {
  background-color: #e0f2fe;
}

tfoot {
  background-color: var(--color-bg-alt);
  font-weight: 600;
  border-top: 2px solid var(--color-primary);
}

th, td {
  padding: 0.75em 1em;
  text-align: left;
  vertical-align: top;
}

th {
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.85em;
  letter-spacing: 0.5px;
}

/* Forms */
form {
  margin: 1.5em 0;
}

fieldset {
  border: 2px solid var(--color-border);
  border-radius: 8px;
  padding: 1.5em;
  margin: 1.5em 0;
}

legend {
  font-weight: 700;
  padding: 0 0.75em;
  color: var(--color-primary);
}

label {
  display: inline-block;
  font-weight: 600;
  margin-bottom: 0.4em;
  color: var(--color-text);
}

input, textarea, select, button {
  font-family: var(--font-primary);
  font-size: 1em;
}

/* Embedded Content */
img, svg, video, audio, canvas, iframe, embed, object {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 1.5em auto;
  page-break-inside: avoid;
  border-radius: 8px;
}

figure {
  margin: 2em 0;
  text-align: center;
  page-break-inside: avoid;
  padding: 1em;
  background-color: var(--color-bg-alt);
  border-radius: 8px;
}

figcaption {
  font-size: 0.9em;
  font-style: italic;
  margin-top: 1em;
  text-align: center;
  color: var(--color-text-light);
}

picture {
  display: block;
}

/* HTML5 Semantic Elements */
address {
  font-style: italic;
  margin: 1.5em 0;
  padding: 1em;
  background-color: var(--color-bg-alt);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 6px 6px 0;
}

time {
  font-variant-numeric: tabular-nums;
  color: var(--color-accent);
  font-weight: 600;
}

details {
  margin: 1.5em 0;
  border: 2px solid var(--color-border);
  padding: 0;
  border-radius: 8px;
  overflow: hidden;
}

summary {
  font-weight: 700;
  cursor: pointer;
  padding: 1em 1.5em;
  background: linear-gradient(135deg, var(--color-bg-alt), #e0f2fe);
  color: var(--color-primary);
  transition: background-color 0.2s ease;
}

summary:hover {
  background-color: #dbeafe;
}

details[open] summary {
  border-bottom: 2px solid var(--color-border);
}

details > *:not(summary) {
  padding: 1em 1.5em;
}

dialog {
  border: 2px solid var(--color-primary);
  border-radius: 8px;
  padding: 1.5em;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

/* Ruby Annotations */
ruby {
  display: ruby;
}

rt {
  display: ruby-text;
  font-size: 0.6em;
  color: var(--color-text-light);
}

rp {
  display: none;
}

/* Template and Slots */
template, slot {
  display: none;
}

/* Miscellaneous Elements */
meter, progress {
  width: 100%;
  margin: 0.75em 0;
  height: 1.5em;
}

progress {
  accent-color: var(--color-primary);
}

output {
  display: inline-block;
  padding: 0.5em 1em;
  background-color: var(--color-bg-alt);
  border-radius: 6px;
  font-weight: 600;
  color: var(--color-primary);
}

/* Interactive Elements */
summary::-webkit-details-marker {
  display: none;
}

/* Responsive adjustments for different screen sizes */
@media screen and (max-width: 1024px) {
  /* Small laptops/tablets landscape */
  body {
    max-width: 95%;
    padding: 1.5rem 2rem;
  }
}

@media screen and (max-width: 768px) {
  /* Tablets portrait */
  html {
    font-size: 10pt;
  }
  
  body {
    max-width: 100%;
    padding: 1rem 1.5rem;
  }
  
  h1 {
    font-size: 1.8em;
  }
  
  h2 {
    font-size: 1.5em;
  }
}

@media screen and (max-width: 480px) {
  /* Mobile phones */
  body {
    padding: 1rem;
  }
  
  h1 {
    font-size: 1.6em;
  }
  
  h2 {
    font-size: 1.3em;
  }
}

/* Print Media Styles for PDF Conversion */
@media print {
  @page {
    size: A4;
    margin: 2cm;
  }
  
  body {
    max-width: none;
    padding: 0;
    margin: 0;
    font-size: 10pt;
  }
  
  /* Critical fix for pre blocks in PDF */
  pre {
    font-size: 7pt !important;
    line-height: 1.3 !important;
    white-space: pre-wrap !important;
    word-wrap: break-word !important;
    overflow-wrap: break-word !important;
    word-break: break-all;
    max-width: 100%;
    overflow: visible !important;
    border-radius: 4px;
    padding: 0.8em !important;
    margin: 1em 0 !important;
    page-break-inside: avoid;
  }
  
  a {
    color: var(--color-text);
    border-bottom: 1px solid var(--color-text);
  }
  
  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
    color: var(--color-text-light);
  }
  
  abbr[title]::after {
    content: " (" attr(title) ")";
  }
  
  h1, h2, h3, h4, h5, h6 {
    page-break-after: avoid;
    break-after: avoid;
  }
  
  p, blockquote, figure, table {
    page-break-inside: avoid;
    break-inside: avoid;
  }
  
  thead {
    display: table-header-group;
  }
  
  tr, img {
    page-break-inside: avoid;
    break-inside: avoid;
  }
  
  nav, video, audio, iframe, embed, object {
    display: none;
  }
  
  img {
    max-width: 100% !important;
  }
  
  table {
    box-shadow: none;
  }
  
  /* Ensure better page breaks */
  article, section {
    page-break-after: auto;
  }
}

/* Utility Classes */
.highlight {
  background-color: var(--color-highlight);
  padding: 0.15em 0.4em;
  border-radius: 3px;
}

.text-primary {
  color: var(--color-primary);
}

.text-secondary {
  color: var(--color-secondary);
}

.no-print {
  display: none;
}

@media screen {
  .print-only {
    display: none;
  }
}

@media print {
  .no-print {
    display: none !important;
  }
  
  .print-only {
    display: block;
  }
}