/* ========================================
   TZP Brandýs-Boleslav - Main Stylesheet
   ======================================== */

/* CSS Variables */
:root {
  /* Colors */
  --primary: #0066cc;
  --primary-dark: #004c99;
  --secondary: #6c757d;
  --success: #28a745;
  --warning: #ffc107;
  --danger: #dc3545;
  --info: #17a2b8;
  --light: #f8f9fa;
  --dark: #343a40;
  --white: #ffffff;

  /* Sidebar */
  --sidebar-width: 280px;
  --sidebar-bg: #2c3e50;
  --sidebar-text: #ecf0f1;
  --sidebar-hover: #34495e;
  --sidebar-active: var(--primary);

  /* MD3 Integration */
  --md3-header-height: 64px;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Courier New", Courier, monospace;
  --font-size-base: 16px;
  --line-height-base: 1.6;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-xxl: 3rem;

  /* Border radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.15);

  /* Transitions */
  --transition: all 0.3s ease;
}

/* ========================================
   Reset & Base Styles
   ======================================== */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  line-height: var(--line-height-base);
  color: var(--dark);
  background-color: var(--white);
}

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

h1, h2, h3, h4, h5, h6 {
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  font-weight: 600;
  line-height: 1.3;
  color: var(--dark);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
  margin-bottom: var(--spacing-md);
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

ul, ol {
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-xl);
}

li {
  margin-bottom: var(--spacing-sm);
}

code {
  font-family: var(--font-mono);
  background-color: var(--light);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-size: 0.9em;
}

pre {
  background-color: var(--light);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin-bottom: var(--spacing-md);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--spacing-lg);
}

th, td {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  border: 1px solid #dee2e6;
}

th {
  background-color: var(--light);
  font-weight: 600;
}

tr:nth-child(even) {
  background-color: #f8f9fa;
}

/* ========================================
   Sidebar Navigation
   ======================================== */

.tzp-sidebar {
  position: fixed;
  left: 0;
  top: var(--md3-header-height);
  width: var(--sidebar-width);
  height: calc(100vh - var(--md3-header-height));
  background-color: var(--sidebar-bg);
  color: var(--sidebar-text);
  overflow-y: auto;
  z-index: 100;
  box-shadow: var(--shadow-lg);
  transition: transform 0.3s ease;
}

.sidebar-header {
  padding: var(--spacing-lg);
  background-color: rgba(0, 0, 0, 0.2);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-logo h2 {
  color: var(--sidebar-text);
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
}

.sidebar-logo span {
  font-size: 0.85rem;
  font-weight: 400;
  opacity: 0.9;
}

.sidebar-search {
  padding: var(--spacing-md);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-search input {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: none;
  border-radius: var(--radius-md);
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--sidebar-text);
  font-size: 0.9rem;
}

.sidebar-search input::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

.sidebar-search input:focus {
  outline: none;
  background-color: rgba(255, 255, 255, 0.15);
}

/* Sidebar menu */
.kapitoly-menu {
  list-style: none;
  padding: 0;
  margin: 0;
}

.kapitoly-menu li {
  margin: 0;
}

.kapitoly-menu > li > a,
.kapitoly-menu > li > button {
  display: flex;
  align-items: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  color: var(--sidebar-text);
  text-decoration: none;
  transition: var(--transition);
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  cursor: pointer;
  font-size: 0.95rem;
}

.kapitoly-menu > li > a:hover,
.kapitoly-menu > li > button:hover {
  background-color: var(--sidebar-hover);
  text-decoration: none;
}

.kapitoly-menu > li > a.active {
  background-color: var(--sidebar-active);
  border-left: 4px solid var(--white);
}

.kapitoly-menu .cislo {
  display: inline-block;
  min-width: 2rem;
  font-weight: 600;
  opacity: 0.8;
}

.kapitoly-menu .icon {
  display: inline-block;
  min-width: 2rem;
  font-size: 1.2rem;
}

/* Menu sections */
.menu-section {
  margin-top: var(--spacing-lg);
  padding: var(--spacing-sm) var(--spacing-lg);
}

.section-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  opacity: 0.6;
  font-weight: 600;
}

/* Accordion submenu */
.has-children {
  position: relative;
}

.accordion-toggle {
  justify-content: space-between;
}

.toggle-icon {
  font-size: 0.8rem;
  transition: transform 0.3s ease;
}

.accordion-toggle[aria-expanded="true"] .toggle-icon {
  transform: rotate(180deg);
}

.podkapitoly {
  list-style: none;
  padding: 0;
  margin: 0;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  background-color: rgba(0, 0, 0, 0.2);
}

.has-children.open .podkapitoly {
  max-height: 500px;
}

.podkapitoly li {
  margin: 0;
}

.podkapitoly a {
  display: block;
  padding: var(--spacing-sm) var(--spacing-lg) var(--spacing-sm) calc(var(--spacing-lg) + 2rem);
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.85rem;
}

.podkapitoly a:hover {
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--white);
  text-decoration: none;
}

/* Sidebar footer */
.sidebar-footer {
  padding: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: var(--spacing-lg);
}

.sidebar-link {
  display: block;
  padding: var(--spacing-sm) 0;
  color: var(--sidebar-text);
  font-size: 0.9rem;
}

.sidebar-link:hover {
  color: var(--white);
  text-decoration: none;
}

/* ========================================
   Mobile Menu Toggle
   ======================================== */

.mobile-menu-toggle {
  display: none;
  position: fixed;
  top: calc(var(--md3-header-height) + var(--spacing-md));
  left: var(--spacing-md);
  z-index: 150;
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--primary);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  align-items: center;
  gap: var(--spacing-sm);
  box-shadow: var(--shadow-md);
  color: var(--white);
  font-size: 0.9rem;
  font-weight: 500;
}

.mobile-menu-toggle svg {
  width: 24px;
  height: 24px;
}

.mobile-menu-toggle span {
  display: inline-block;
  color: var(--white);
}

/* ========================================
   Main Content
   ======================================== */

.tzp-page-content {
  margin-top: var(--md3-header-height);
}

.tzp-content-wrapper {
  margin-left: var(--sidebar-width);
}

.tzp-content {
  padding: var(--spacing-xl);
  max-width: 900px;
  min-height: calc(100vh - var(--md3-header-height));
}

/* ========================================
   Breadcrumbs
   ======================================== */

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  font-size: 0.9rem;
  color: var(--secondary);
}

.breadcrumbs a {
  color: var(--secondary);
}

.breadcrumbs a:hover {
  color: var(--primary);
}

.breadcrumbs .separator {
  opacity: 0.5;
}

.breadcrumbs .current {
  color: var(--dark);
  font-weight: 500;
}

/* ========================================
   Page Headers
   ======================================== */

.kapitola-header,
.pruvodce-header {
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 3px solid var(--primary);
}

.kapitola-cislo {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  background-color: var(--primary);
  color: var(--white);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.kapitola-popis,
.pruvodce-popis {
  font-size: 1.1rem;
  color: var(--secondary);
  margin-top: var(--spacing-sm);
}

.pruvodce-icon {
  font-size: 3rem;
  display: block;
  margin-bottom: var(--spacing-md);
}

/* ========================================
   Content Sections
   ======================================== */

.kapitola-content,
.pruvodce-content {
  line-height: 1.8;
}

/* Section headings with anchor links */
.kapitola-content h2,
.kapitola-content h3 {
  position: relative;
  padding-top: var(--spacing-md);
}

.kapitola-content h2::before {
  content: '';
  display: block;
  height: 80px;
  margin-top: -80px;
  visibility: hidden;
}

/* ========================================
   Alerts
   ======================================== */

.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  border-radius: var(--radius-md);
  border-left: 4px solid;
}

.alert-icon {
  font-size: 1.5rem;
  line-height: 1;
}

.alert-content {
  flex: 1;
}

.alert-title {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 600;
}

.alert-info {
  background-color: #d1ecf1;
  border-color: var(--info);
  color: #0c5460;
}

.alert-warning {
  background-color: #fff3cd;
  border-color: var(--warning);
  color: #856404;
}

.alert-danger {
  background-color: #f8d7da;
  border-color: var(--danger);
  color: #721c24;
}

.alert-success {
  background-color: #d4edda;
  border-color: var(--success);
  color: #155724;
}

/* ========================================
   Checklist
   ======================================== */

.checklist {
  background-color: var(--light);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
}

.checklist-title {
  margin-top: 0;
  margin-bottom: var(--spacing-md);
  font-size: 1.1rem;
}

.checklist-items {
  list-style: none;
  padding: 0;
  margin: 0;
}

.checklist-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  padding: var(--spacing-sm) 0;
  margin: 0;
}

.checkbox {
  font-size: 1.2rem;
  color: var(--secondary);
  flex-shrink: 0;
}

.item-text {
  flex: 1;
}

/* ========================================
   Navigation Between Chapters
   ======================================== */

.kapitola-nav {
  display: flex;
  justify-content: space-between;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xxl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid #dee2e6;
}

.nav-prev,
.nav-next {
  flex: 1;
}

.nav-next {
  text-align: right;
}

.nav-link {
  display: inline-block;
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: var(--primary);
  color: var(--white);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: var(--transition);
}

.nav-link:hover {
  background-color: var(--primary-dark);
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.nav-label {
  font-weight: 500;
}

/* ========================================
   Footer
   ======================================== */

.kapitola-footer,
.pruvodce-footer {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid #dee2e6;
}

.last-updated {
  font-size: 0.9rem;
  color: var(--secondary);
}

.back-link {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--primary);
  border: 1px solid var(--primary);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: var(--transition);
}

.back-link:hover {
  background-color: var(--primary);
  color: var(--white);
  text-decoration: none;
}

.tzp-footer {
  margin-left: var(--sidebar-width);
  padding: var(--spacing-xl);
  background-color: var(--light);
  border-top: 1px solid #dee2e6;
  text-align: center;
}

.footer-content {
  max-width: 900px;
  margin: 0 auto;
  font-size: 0.9rem;
  color: var(--secondary);
}

/* ========================================
   Related Links
   ======================================== */

.related-links {
  background-color: var(--light);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  margin: var(--spacing-xl) 0;
}

.related-links h3 {
  margin-top: 0;
  font-size: 1.2rem;
}

.related-links ul {
  margin-bottom: 0;
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 768px) {
  .mobile-menu-toggle,
  .tzp-mobile-toggle {
    display: flex;
  }

  .tzp-sidebar {
    transform: translateX(-100%);
    top: var(--md3-header-height);
  }

  .tzp-sidebar.open {
    transform: translateX(0);
  }

  .tzp-content-wrapper {
    margin-left: 0;
  }

  .tzp-content {
    padding: var(--spacing-lg) var(--spacing-md);
    padding-top: calc(var(--spacing-xl) + 40px); /* Space for mobile menu button */
  }

  .tzp-footer {
    margin-left: 0;
  }

  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
  h3 { font-size: 1.5rem; }

  .kapitola-nav {
    flex-direction: column;
  }

  .nav-next {
    text-align: left;
  }

  table {
    font-size: 0.9rem;
  }

  th, td {
    padding: var(--spacing-xs) var(--spacing-sm);
  }
}

@media (max-width: 480px) {
  :root {
    --font-size-base: 14px;
  }

  .tzp-content {
    padding: var(--spacing-md) var(--spacing-sm);
    padding-top: calc(var(--spacing-lg) + 40px);
  }
}

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

@media print {
  .tzp-sidebar,
  .mobile-menu-toggle,
  .kapitola-nav,
  .breadcrumbs,
  .tzp-footer {
    display: none;
  }

  .tzp-content {
    margin-left: 0;
    max-width: 100%;
  }

  a {
    text-decoration: none;
    color: var(--dark);
  }

  a[href]:after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
    color: var(--secondary);
  }
}