/**
 * LPIC-1 Persian Documentation - Clean & Professional Design
 * Optimized for Persian RTL content with modern aesthetics
 */

/* ================================
   Root Variables - Clean Color Palette
   ================================ */
:root {
  --md-primary-fg-color: #2563eb;
  --md-primary-fg-color--light: #3b82f6;
  --md-primary-fg-color--dark: #1e40af;
  --md-accent-fg-color: #7c3aed;
  
  /* Persian content colors */
  --persian-text-color: #1f2937;
  --persian-heading-color: #111827;
  --persian-link-color: #2563eb;
  --persian-code-inline-bg: rgba(37, 99, 235, 0.1);
  --persian-code-inline-text: #1e40af;
  --persian-code-block-bg: #f8fafc;
  --persian-code-text: #334155;
  --persian-border-color: #e5e7eb;
  --persian-shadow: rgba(0, 0, 0, 0.1);
  --persian-hover-bg: rgba(37, 99, 235, 0.08);
  --persian-card-bg: #ffffff;
  
  /* Syntax highlighting - Professional */
  --code-keyword: #9333ea;
  --code-string: #059669;
  --code-function: #0284c7;
  --code-comment: #6b7280;
  --code-number: #ea580c;
  --code-operator: #0891b2;
  --code-variable: #dc2626;
}

/* Dark mode variables */
[data-md-color-scheme="slate"] {
  --md-primary-fg-color: #3b82f6;
  --md-accent-fg-color: #8b5cf6;
  --persian-text-color: #e5e7eb;
  --persian-heading-color: #f3f4f6;
  --persian-code-inline-bg: rgba(59, 130, 246, 0.15);
  --persian-code-inline-text: #93c5fd;
  --persian-code-block-bg: #1e293b;
  --persian-code-text: #cbd5e1;
  --persian-border-color: #374151;
  --persian-shadow: rgba(0, 0, 0, 0.5);
  --persian-hover-bg: rgba(59, 130, 246, 0.15);
  --persian-card-bg: #1f2937;
}

/* ================================
   Typography
   ================================ */
html[dir="rtl"] {
  font-family: "Vazirmatn", "Tahoma", sans-serif;
  font-size: 16px;
  line-height: 1.75;
}

html[dir="rtl"] body {
  text-align: right;
  direction: rtl;
  color: var(--persian-text-color);
}

/* ================================
   Headers - Clean & Modern
   ================================ */
html[dir="rtl"] h1,
html[dir="rtl"] h2,
html[dir="rtl"] h3,
html[dir="rtl"] h4 {
  font-family: "Vazirmatn", sans-serif;
  font-weight: 700;
  color: var(--persian-heading-color);
  margin-top: 2em;
  margin-bottom: 0.8em;
  line-height: 1.3;
}

html[dir="rtl"] h1 {
  font-size: 2.25em;
  border-bottom: 3px solid var(--md-primary-fg-color);
  padding-bottom: 0.5em;
  margin-bottom: 1.2em;
}

html[dir="rtl"] h2 {
  font-size: 1.75em;
  border-right: 4px solid var(--md-primary-fg-color);
  padding-right: 1rem;
}

html[dir="rtl"] h3 {
  font-size: 1.4em;
  color: var(--md-primary-fg-color--dark);
}

/* ================================
   Inline Code - Blue Professional Style
   ================================ */
html[dir="rtl"] code,
code {
  font-family: "Fira Code", "JetBrains Mono", monospace;
  background: var(--persian-code-inline-bg);
  color: var(--persian-code-inline-text);
  padding: 0.2em 0.6em;
  border-radius: 6px;
  font-size: 0.9em;
  font-weight: 600;
  border: 1px solid rgba(37, 99, 235, 0.2);
  white-space: nowrap;
  transition: all 0.2s ease;
  direction: ltr !important;
  display: inline-block;
  unicode-bidi: embed;
}

[data-md-color-scheme="slate"] code {
  background: var(--persian-code-inline-bg);
  color: var(--persian-code-inline-text);
  border-color: rgba(59, 130, 246, 0.3);
}

html[dir="rtl"] code:hover,
code:hover {
  background: rgba(37, 99, 235, 0.15);
  border-color: var(--md-primary-fg-color);
  transform: translateY(-1px);
}

/* ================================
   Code Blocks - Clean Syntax Highlighting
   ================================ */
html[dir="rtl"] pre,
pre {
  direction: ltr !important;
  text-align: left !important;
  background: var(--persian-code-block-bg) !important;
  border-radius: 8px;
  padding: 1em;
  overflow-x: auto;
  border-left: 3px solid var(--md-primary-fg-color);
  margin: 1.5em 0;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
  position: relative;
}

[data-md-color-scheme="slate"] pre {
  background: var(--persian-code-block-bg) !important;
}

html[dir="rtl"] pre code,
pre code {
  background: transparent !important;
  padding: 0;
  border: none !important;
  direction: ltr !important;
  text-align: left !important;
  color: var(--persian-code-text);
  font-size: 0.9em;
  line-height: 1.6;
  display: block;
  white-space: pre;
}

/* Syntax highlighting - Professional colors */
pre code .hljs-keyword,
pre code .hljs-selector-tag {
  color: var(--code-keyword);
  font-weight: 600;
}

pre code .hljs-string,
pre code .hljs-attr {
  color: var(--code-string);
}

pre code .hljs-function,
pre code .hljs-title {
  color: var(--code-function);
  font-weight: 600;
}

pre code .hljs-comment {
  color: var(--code-comment);
  font-style: italic;
  opacity: 0.8;
}

pre code .hljs-number,
pre code .hljs-literal {
  color: var(--code-number);
}

pre code .hljs-built_in,
pre code .hljs-operator {
  color: var(--code-operator);
}

pre code .hljs-variable,
pre code .hljs-name {
  color: var(--code-variable);
}

/* ================================
   Table of Contents - Simple Clean Numbering
   ================================ */
.md-nav--secondary .md-nav__list {
  counter-reset: toc-section;
}

.md-nav--secondary .md-nav__item {
  counter-increment: toc-section;
  margin-bottom: 0.4rem;
}

.md-nav--secondary .md-nav__item > .md-nav__link::before {
  content: counter(toc-section) ". ";
  font-weight: 700;
  color: var(--md-primary-fg-color);
  margin-left: 0.5rem;
}

.md-nav--secondary .md-nav__item .md-nav__list {
  counter-reset: toc-subsection;
  margin-right: 1.5rem;
  padding-right: 0.5rem;
  border-right: 2px solid var(--persian-border-color);
}

.md-nav--secondary .md-nav__item .md-nav__item {
  counter-increment: toc-subsection;
  margin-bottom: 0.3rem;
}

.md-nav--secondary .md-nav__item .md-nav__item > .md-nav__link::before {
  content: counter(toc-section) "." counter(toc-subsection) " ";
  font-weight: 600;
  color: var(--md-primary-fg-color--light);
  margin-left: 0.5rem;
}

.md-nav--secondary .md-nav__item .md-nav__item .md-nav__list {
  counter-reset: toc-subsubsection;
  margin-right: 1.5rem;
  padding-right: 0.5rem;
  border-right: 1px solid var(--persian-border-color);
}

.md-nav--secondary .md-nav__item .md-nav__item .md-nav__item {
  counter-increment: toc-subsubsection;
  margin-bottom: 0.2rem;
}

.md-nav--secondary .md-nav__item .md-nav__item .md-nav__item > .md-nav__link::before {
  content: counter(toc-section) "." counter(toc-subsection) "." counter(toc-subsubsection) " ";
  font-size: 0.85em;
  font-weight: 500;
  color: var(--persian-text-color);
  opacity: 0.7;
  margin-left: 0.5rem;
}

/* ================================
   Footer Navigation - Highly Visible & Clean
   ================================ */
.md-footer {
  background: transparent;
  margin-top: 3rem;
}

.md-footer__inner {
  padding: 2rem;
  background: transparent;
  max-width: 100%;
}

.md-footer__link {
  padding: 1.5rem 2rem !important;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--md-primary-fg-color) 0%, var(--md-primary-fg-color--dark) 100%);
  color: white !important;
  border: none !important;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
  transition: all 0.3s ease;
  margin: 0.5rem;
  position: relative;
  overflow: hidden;
}

.md-footer__link::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition: width 0.5s, height 0.5s;
}

.md-footer__link:hover::before {
  width: 300px;
  height: 300px;
}

.md-footer__link:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.4);
}

.md-footer__link * {
  color: white !important;
  position: relative;
  z-index: 1;
}

.md-footer__title {
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
  opacity: 0.95;
}

.md-footer__direction {
  font-size: 2rem;
  font-weight: 800;
}

.md-footer__link--prev .md-footer__direction {
  margin-left: 0.5rem;
}

.md-footer__link--next .md-footer__direction {
  margin-right: 0.5rem;
}

/* ================================
   Lesson Cards - Clean Modern Design
   ================================ */
.lessons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.lesson-card {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.04) 0%, rgba(124, 58, 237, 0.04) 100%);
  border-radius: 12px;
  padding: 2rem;
  border: 2px solid var(--persian-border-color);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.lesson-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--md-primary-fg-color) 0%, var(--md-accent-fg-color) 100%);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.3s ease;
}

.lesson-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 24px rgba(37, 99, 235, 0.15);
  border-color: var(--md-primary-fg-color);
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.06) 0%, rgba(124, 58, 237, 0.06) 100%);
}

.lesson-card:hover::before {
  transform: scaleY(1);
}

.lesson-card h3 {
  margin: 0 0 1rem 0 !important;
  padding: 0 !important;
  border: none !important;
  font-size: 1.3em;
}

.lesson-card .description {
  opacity: 0.85;
  line-height: 1.7;
  margin-bottom: 1.5rem;
  font-size: 0.95em;
}

.lesson-card .read-more {
  color: var(--md-primary-fg-color);
  font-weight: 600;
  text-decoration: none !important;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.3s ease;
}

.lesson-card .read-more:hover {
  gap: 0.8rem;
  color: var(--md-primary-fg-color--dark);
}

.lesson-card .read-more .arrow {
  transition: transform 0.3s ease;
}

.lesson-card:hover .read-more .arrow {
  transform: translateX(-3px);
}

.lesson-badge {
  display: inline-block;
  padding: 0.4rem 1rem;
  font-size: 0.75em;
  font-weight: 700;
  border-radius: 20px;
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.lesson-badge.available {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: white;
  box-shadow: 0 2px 6px rgba(16, 185, 129, 0.3);
}

.lesson-badge.coming-soon {
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  color: white;
  box-shadow: 0 2px 6px rgba(245, 158, 11, 0.3);
}

/* ================================
   Links - Clean Hover Effect
   ================================ */
html[dir="rtl"] a {
  color: var(--persian-link-color);
  text-decoration: none;
  transition: color 0.2s ease;
  font-weight: 500;
}

html[dir="rtl"] a:hover {
  color: var(--md-primary-fg-color--dark);
}

/* ================================
   Tables - Professional Style
   ================================ */
html[dir="rtl"] table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 1.5em 0;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

html[dir="rtl"] th {
  background: var(--md-primary-fg-color);
  color: white;
  font-weight: 700;
  padding: 1em;
  text-align: right;
}

html[dir="rtl"] td {
  padding: 0.9em 1em;
  border-bottom: 1px solid var(--persian-border-color);
  text-align: right;
}

html[dir="rtl"] tr:nth-child(even) {
  background: rgba(37, 99, 235, 0.02);
}

html[dir="rtl"] tr:hover {
  background: var(--persian-hover-bg);
}

/* ================================
   Admonitions - Clean Informative Boxes
   ================================ */
html[dir="rtl"] .admonition {
  margin: 1.5em 0;
  padding: 1em 1.5em;
  border-right: 4px solid var(--md-primary-fg-color);
  border-radius: 0 8px 8px 0;
  background: var(--persian-hover-bg);
}

html[dir="rtl"] .admonition.warning {
  border-right-color: #f59e0b;
  background: rgba(245, 158, 11, 0.08);
}

html[dir="rtl"] .admonition.danger {
  border-right-color: #ef4444;
  background: rgba(239, 68, 68, 0.08);
}

html[dir="rtl"] .admonition.success {
  border-right-color: #10b981;
  background: rgba(16, 185, 129, 0.08);
}

/* ================================
   Lists - Better Spacing
   ================================ */
html[dir="rtl"] ul,
html[dir="rtl"] ol {
  padding-right: 2em;
  padding-left: 0;
  margin: 1em 0;
}

html[dir="rtl"] li {
  margin-bottom: 0.5em;
  line-height: 1.7;
}

/* ================================
   Responsive Design
   ================================ */
@media screen and (max-width: 768px) {
  .lessons-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .md-footer__link {
    margin: 0.3rem;
    padding: 1.2rem 1.5rem !important;
  }
  
  .md-footer__direction {
    font-size: 1.5rem;
  }
}

/* ================================
   Smooth Animations & Selection
   ================================ */
html {
  scroll-behavior: smooth;
}

::selection {
  background: var(--md-primary-fg-color);
  color: white;
}

/* Smooth transitions for all interactive elements */
a, button, .lesson-card, code {
  transition: all 0.2s ease;
}

.md-header__title {
    margin-right: 0 !important;
}