/**
 * GA4 UCP Code Reference - Main Stylesheet
 * Design: Technical, red/black/grey, IBM Plex fonts, no rounded corners
 */

/* ===== CSS Variables ===== */
:root {
  /* Colors - Red, Black, Grey */
  --color-primary: #d32f2f;
  --color-primary-dark: #b71c1c;
  --color-primary-darker: #8b0000;
  --color-black: #1a1a1a;
  --color-grey-dark: #333333;
  --color-grey: #666666;
  --color-grey-light: #999999;
  --color-grey-lighter: #e0e0e0;
  --color-grey-lightest: #f5f5f5;
  --color-white: #ffffff;
  
  /* Typography */
  --font-sans: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  
  /* Borders - No rounded corners */
  --border-radius: 0;
  --border-width: 1px;
  --border-color: var(--color-grey-lighter);
}

/* ===== Base Styles ===== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-black);
  background: var(--color-white);
}

/* Override UIKit rounded corners */
.uk-card,
.uk-button,
.uk-input,
.uk-textarea,
.uk-select,
.uk-modal-dialog,
.uk-offcanvas-bar {
  border-radius: 0 !important;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-black);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

code, pre {
  font-family: var(--font-mono);
}

/* ===== Layout: Sidebar ===== */
.site-layout {
  display: flex;
  min-height: 100vh;
}

.site-sidebar {
  width: 280px;
  background: var(--color-grey-lightest);
  border-right: var(--border-width) solid var(--border-color);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  overflow-y: auto;
}

.site-main {
  flex: 1;
  margin-left: 280px;
  display: flex;
  flex-direction: column;
}

/* ===== Sidebar Components ===== */
.sidebar-header {
  padding: var(--spacing-lg);
  border-bottom: var(--border-width) solid var(--border-color);
  background: var(--color-white);
}

.sidebar-header__logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--color-primary);
  font-size: 1.25rem;
  font-weight: 700;
  text-decoration: none;
}

.sidebar-header__subtitle {
  font-size: 0.75rem;
  color: var(--color-grey);
  margin-top: var(--spacing-xs);
}

.sidebar-categories {
  padding: var(--spacing-md);
  border-bottom: var(--border-width) solid var(--border-color);
}

.sidebar-nav {
  flex: 1;
  padding: var(--spacing-md);
  overflow-y: auto;
}

.sidebar-footer {
  padding: var(--spacing-lg);
  border-top: var(--border-width) solid var(--border-color);
  font-size: 0.75rem;
  color: var(--color-grey);
}

/* ===== Navigation Buttons ===== */
.nav-button {
  display: block;
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  margin-bottom: var(--spacing-xs);
  background: transparent;
  border: var(--border-width) solid transparent;
  color: var(--color-grey-dark);
  font-size: 0.875rem;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  transition: all 0.2s ease;
}

.nav-button:hover {
  background: var(--color-white);
  color: var(--color-black);
}

.nav-button--active {
  background: var(--color-primary);
  color: var(--color-white);
  font-weight: 600;
}

.nav-button--section {
  font-size: 0.8125rem;
  padding: var(--spacing-sm);
  color: var(--color-grey);
}

.nav-button--section:hover {
  background: var(--color-white);
  color: var(--color-black);
}

.nav-button--section.active {
  background: var(--color-grey-lighter);
  color: var(--color-black);
  font-weight: 600;
}

/* ===== Header ===== */
.site-header {
  background: var(--color-white);
  border-bottom: var(--border-width) solid var(--border-color);
  padding: var(--spacing-lg) var(--spacing-xl);
}

.site-header__title {
  font-size: 2rem;
  margin-bottom: var(--spacing-xs);
}

.site-header__description {
  color: var(--color-grey);
  font-size: 0.875rem;
  margin-bottom: var(--spacing-lg);
}

.site-header__actions {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

/* ===== Search Bar ===== */
.search-bar {
  position: relative;
}

.search-bar__input {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-md) var(--spacing-md) 3rem;
  border: var(--border-width) solid var(--border-color);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  transition: border-color 0.2s ease;
}

.search-bar__input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(211, 47, 47, 0.1);
}

.search-bar__icon {
  position: absolute;
  left: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-grey);
}

.search-bar__clear {
  position: absolute;
  right: var(--spacing-sm);
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  color: var(--color-grey);
  cursor: pointer;
  padding: var(--spacing-xs);
}

/* ===== Content Area ===== */
.site-content {
  flex: 1;
  padding: var(--spacing-xl);
  max-width: 1200px;
  overflow-y: auto;
}

.content-header {
  margin-bottom: var(--spacing-xl);
}

.content-header__count {
  color: var(--color-grey);
  font-size: 0.875rem;
}

/* ===== Code Section ===== */
.code-section {
  margin-bottom: var(--spacing-2xl);
  animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.code-section__header {
  margin-bottom: var(--spacing-lg);
}

.code-section__title {
  font-size: 1.75rem;
  margin-bottom: var(--spacing-sm);
}

.code-section__description {
  color: var(--color-grey);
  margin-bottom: var(--spacing-md);
}

.code-section__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.code-tag {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--color-grey-lightest);
  border: var(--border-width) solid var(--border-color);
  color: var(--color-grey-dark);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
}

/* ===== Code Block ===== */
.code-block {
  background: var(--color-grey-lightest);
  border: var(--border-width) solid var(--border-color);
  overflow: hidden;
}

.code-block__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-white);
  border-bottom: var(--border-width) solid var(--border-color);
}

.code-block__title {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-grey);
}

.code-block__copy {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  background: transparent;
  border: var(--border-width) solid var(--border-color);
  color: var(--color-grey-dark);
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.code-block__copy:hover {
  background: var(--color-grey-lightest);
  border-color: var(--color-grey);
}

.code-block__copy--copied {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

.code-block__content {
  overflow-x: auto;
  background: #2d2d2d;
}

.code-block__content pre {
  margin: 0;
  padding: var(--spacing-lg);
  font-size: 0.875rem;
  line-height: 1.7;
}

.code-block__content code {
  font-family: var(--font-mono);
}

/* ===== Empty State ===== */
.empty-state {
  text-align: center;
  padding: var(--spacing-2xl);
  color: var(--color-grey);
}

.empty-state__icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-lg);
}

.empty-state__title {
  font-size: 1.25rem;
  color: var(--color-grey-dark);
  margin-bottom: var(--spacing-sm);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-white);
  border: var(--border-width) solid var(--border-color);
  color: var(--color-black);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn:hover {
  background: var(--color-grey-lightest);
  transform: translateY(-1px);
}

.btn--primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

.btn--primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .site-sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    z-index: 1000;
  }
  
  .site-sidebar.is-open {
    transform: translateX(0);
  }
  
  .site-main {
    margin-left: 0;
  }
  
  .site-header,
  .site-content {
    padding: var(--spacing-md);
  }
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-grey-lightest);
}

::-webkit-scrollbar-thumb {
  background: var(--color-grey-light);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-grey);
}