/* ==========================================================================
   RADAR Ghost Theme - Main Stylesheet
   Inspired by Configurine design system
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties / Design Tokens
   -------------------------------------------------------------------------- */
:root {
  /* Primary Color - Indigo 500 */
  --color-primary: #6366f1;
  --color-primary-hover: #4f46e5;
  --color-primary-light: #a5b4fc;

  /* Light Mode Colors */
  --color-bg: #ffffff;
  --color-bg-alt: #f9fafb;
  --color-panel: #f3f4f6;
  --color-panel-border: #e5e7eb;
  --color-text: #000000;
  --color-text-secondary: #4b5563;
  --color-text-muted: #6b7280;
  --color-border: #e5e7eb;

  /* Typography */
  --font-family: 'Zalando Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  --font-size-6xl: 3.75rem;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;

  /* Layout */
  --max-width: 1200px;
  --content-width: 900px;
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
  :root:not(.light-mode) {
    --color-bg: #000000;
    --color-bg-alt: #111111;
    --color-panel: #1a1a1a;
    --color-panel-border: #333333;
    --color-text: #ffffff;
    --color-text-secondary: #a0a0a0;
    --color-text-muted: #666666;
    --color-border: #333333;

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
  }
}

/* Manual Dark Mode Toggle */
.dark-mode {
  --color-bg: #000000;
  --color-bg-alt: #111111;
  --color-panel: #1a1a1a;
  --color-panel-border: #333333;
  --color-text: #ffffff;
  --color-text-secondary: #a0a0a0;
  --color-text-muted: #666666;
  --color-border: #333333;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
}

/* --------------------------------------------------------------------------
   Base Styles
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: background-color var(--transition-base), color var(--transition-base);
}

/* --------------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------------- */
h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0 0 var(--spacing-md) 0;
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

h1 {
  font-size: var(--font-size-5xl);
}

h2 {
  font-size: var(--font-size-4xl);
}

h3 {
  font-size: var(--font-size-3xl);
}

h4 {
  font-size: var(--font-size-2xl);
}

h5 {
  font-size: var(--font-size-xl);
}

h6 {
  font-size: var(--font-size-lg);
}

p {
  margin: 0 0 var(--spacing-md) 0;
}

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

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

strong,
b {
  font-weight: 700;
}

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.content-width {
  max-width: var(--content-width);
  margin: 0 auto;
}

.site-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-main {
  flex: 1;
  padding: var(--spacing-2xl) 0;
}

/* --------------------------------------------------------------------------
   Panel Component - Core Configurine Style
   -------------------------------------------------------------------------- */
.panel {
  background-color: var(--color-panel);
  border: 1px solid var(--color-panel-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  transition: background-color var(--transition-base), border-color var(--transition-base);
}

.panel--hover:hover {
  border-color: var(--color-primary);
}

.panel--large {
  padding: var(--spacing-xl);
}

.panel--small {
  padding: var(--spacing-md);
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.site-header {
  padding: var(--spacing-lg) 0;
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: background-color var(--transition-base), border-color var(--transition-base);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-lg);
}

.site-logo {
  font-size: var(--font-size-2xl);
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--color-text);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.site-logo:hover {
  color: var(--color-primary);
}

/* Navigation */
.site-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav__link {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
  text-decoration: none;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.site-nav__link:hover,
.site-nav__link--active {
  color: var(--color-text);
  background-color: var(--color-panel);
}

/* Dark Mode Toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  background: var(--color-panel);
  border: 1px solid var(--color-panel-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.theme-toggle:hover {
  border-color: var(--color-primary);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
  fill: var(--color-text);
}

.theme-toggle .icon-moon {
  display: block;
}

.theme-toggle .icon-sun {
  display: none;
}

.dark-mode .theme-toggle .icon-moon {
  display: none;
}

.dark-mode .theme-toggle .icon-sun {
  display: block;
}

/* Mobile Menu */
.menu-toggle {
  display: none;
  padding: var(--spacing-sm);
  background: none;
  border: none;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  margin: 5px 0;
  transition: transform var(--transition-fast);
}

@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  .site-nav__list {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-md);
    flex-direction: column;
    align-items: stretch;
  }

  .site-nav__list.is-open {
    display: flex;
  }
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.site-footer {
  padding: var(--spacing-2xl) 0;
  border-top: 1px solid var(--color-border);
  background-color: var(--color-bg-alt);
  transition: background-color var(--transition-base), border-color var(--transition-base);
}

.site-footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-lg);
  text-align: center;
}

.site-footer__nav {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  justify-content: center;
}

.site-footer__link {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.site-footer__link:hover {
  color: var(--color-primary);
}

.site-footer__copyright {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero {
  text-align: center;
  padding: var(--spacing-3xl) 0;
}

.hero__title {
  font-size: var(--font-size-6xl);
  font-weight: 900;
  letter-spacing: -0.04em;
  margin-bottom: var(--spacing-md);
}

.hero__subtitle {
  font-size: var(--font-size-xl);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* --------------------------------------------------------------------------
   Post Cards
   -------------------------------------------------------------------------- */
.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--spacing-xl);
}

.post-card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-panel);
  border: 1px solid var(--color-panel-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.post-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.post-card__image {
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.post-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.post-card:hover .post-card__image img {
  transform: scale(1.05);
}

.post-card__content {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: var(--spacing-lg);
}

.post-card__tag {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.post-card__title {
  font-size: var(--font-size-xl);
  font-weight: 800;
  margin-bottom: var(--spacing-sm);
  line-height: 1.3;
}

.post-card__title a {
  color: var(--color-text);
  text-decoration: none;
}

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

.post-card__excerpt {
  flex: 1;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
}

.post-card__meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.post-card__author {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.post-card__avatar {
  width: 24px;
  height: 24px;
  border-radius: var(--radius-full);
  object-fit: cover;
}

/* Featured Post */
.post-card--featured {
  grid-column: 1 / -1;
}

@media (min-width: 768px) {
  .post-card--featured {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .post-card--featured .post-card__image {
    aspect-ratio: auto;
  }

  .post-card--featured .post-card__content {
    padding: var(--spacing-xl);
    justify-content: center;
  }

  .post-card--featured .post-card__title {
    font-size: var(--font-size-3xl);
  }

  .post-card--featured .post-card__excerpt {
    font-size: var(--font-size-base);
  }
}

/* --------------------------------------------------------------------------
   Single Post
   -------------------------------------------------------------------------- */
.post-header {
  text-align: center;
  padding: var(--spacing-2xl) 0;
  max-width: var(--content-width);
  margin: 0 auto;
}

.post-header__tag {
  display: inline-block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

.post-header__title {
  font-size: var(--font-size-5xl);
  font-weight: 900;
  letter-spacing: -0.03em;
  margin-bottom: var(--spacing-lg);
}

.post-header__meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-lg);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

.post-header__author {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.post-header__avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  object-fit: cover;
}

.post-feature-image {
  max-width: var(--max-width);
  margin: 0 auto var(--spacing-2xl);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.post-feature-image img {
  width: 100%;
  height: auto;
  display: block;
}

.post-content {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: var(--spacing-xl);
  background-color: var(--color-panel);
  border: 1px solid var(--color-panel-border);
  border-radius: var(--radius-md);
}

.post-content>*:first-child {
  margin-top: 0;
}

.post-content>*:last-child {
  margin-bottom: 0;
}

.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4 {
  margin-top: var(--spacing-2xl);
  margin-bottom: var(--spacing-md);
}

.post-content p,
.post-content ul,
.post-content ol {
  margin-bottom: var(--spacing-lg);
}

.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
}

.post-content blockquote {
  margin: var(--spacing-xl) 0;
  padding: var(--spacing-lg);
  border-left: 4px solid var(--color-primary);
  background-color: var(--color-bg-alt);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

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

.post-content pre {
  margin: var(--spacing-xl) 0;
  padding: var(--spacing-lg);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow-x: auto;
}

.post-content code {
  font-family: 'SF Mono', Monaco, 'Courier New', monospace;
  font-size: 0.9em;
}

.post-content a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

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

/* Author Box */
.author-box {
  display: flex;
  gap: var(--spacing-lg);
  padding: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
  background-color: var(--color-panel);
  border: 1px solid var(--color-panel-border);
  border-radius: var(--radius-md);
  max-width: var(--content-width);
  margin-left: auto;
  margin-right: auto;
}

.author-box__avatar {
  flex-shrink: 0;
  width: 80px;
  height: 80px;
  border-radius: var(--radius-full);
  object-fit: cover;
}

.author-box__name {
  font-size: var(--font-size-xl);
  font-weight: 800;
  margin-bottom: var(--spacing-xs);
}

.author-box__bio {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin: 0;
}

/* --------------------------------------------------------------------------
   Pagination
   -------------------------------------------------------------------------- */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  margin-top: var(--spacing-2xl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--color-border);
}

.pagination__link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
  background-color: var(--color-panel);
  border: 1px solid var(--color-panel-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.pagination__link:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.pagination__info {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   Archive Pages (Author, Tag)
   -------------------------------------------------------------------------- */
.archive-header {
  text-align: center;
  padding: var(--spacing-2xl) 0;
  margin-bottom: var(--spacing-xl);
}

.archive-header__label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-sm);
}

.archive-header__title {
  font-size: var(--font-size-4xl);
  font-weight: 900;
  margin-bottom: var(--spacing-md);
}

.archive-header__description {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.archive-header__avatar {
  width: 120px;
  height: 120px;
  border-radius: var(--radius-full);
  margin: 0 auto var(--spacing-lg);
  object-fit: cover;
  border: 3px solid var(--color-panel-border);
}

/* --------------------------------------------------------------------------
   Error Page
   -------------------------------------------------------------------------- */
.error-page {
  text-align: center;
  padding: var(--spacing-3xl) 0;
}

.error-page__code {
  font-size: 8rem;
  font-weight: 900;
  letter-spacing: -0.05em;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: var(--spacing-md);
}

.error-page__title {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-lg);
}

.error-page__message {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xl);
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.button--primary {
  background-color: var(--color-primary);
  color: #ffffff;
}

.button--primary:hover {
  background-color: var(--color-primary-hover);
  color: #ffffff;
}

.button--secondary {
  background-color: var(--color-panel);
  color: var(--color-text);
  border: 1px solid var(--color-panel-border);
}

.button--secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   Utility Classes
   -------------------------------------------------------------------------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-center {
  text-align: center;
}

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

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

.mt-0 {
  margin-top: 0;
}

.mb-0 {
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   Ghost Specific - Koenig Editor Cards
   -------------------------------------------------------------------------- */
.kg-card {
  margin: var(--spacing-xl) 0;
}

.kg-image-card img,
.kg-gallery-image img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
}

.kg-width-wide {
  max-width: calc(var(--content-width) + 200px);
  margin-left: auto;
  margin-right: auto;
}

.kg-width-full {
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
}

.kg-bookmark-card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.kg-bookmark-container {
  display: flex;
  text-decoration: none;
  color: inherit;
}

.kg-bookmark-content {
  flex: 1;
  padding: var(--spacing-lg);
}

.kg-bookmark-title {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--spacing-xs);
}

.kg-bookmark-description {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.kg-bookmark-metadata {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.kg-bookmark-icon {
  width: 16px;
  height: 16px;
}

.kg-bookmark-thumbnail {
  width: 200px;
  flex-shrink: 0;
}

.kg-bookmark-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.kg-bookmark-author {
  font-weight: 600;
}

.kg-bookmark-publisher {
  color: var(--color-text-muted);
}

.kg-bookmark-author::after {
  content: "•";
  margin: 0 var(--spacing-xs);
}

/* Gallery Cards */
.kg-gallery-container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.kg-gallery-row {
  display: flex;
  gap: var(--spacing-md);
}

.kg-gallery-row img {
  flex: 1;
  min-width: 0;
  height: auto;
  border-radius: var(--radius-md);
}

/* Responsive adjustments */
@media (max-width: 768px) {
  :root {
    --font-size-5xl: 2.5rem;
    --font-size-6xl: 3rem;
  }

  .post-header__title {
    font-size: var(--font-size-4xl);
  }

  .hero__title {
    font-size: var(--font-size-5xl);
  }

  .post-grid {
    grid-template-columns: 1fr;
  }

  .author-box {
    flex-direction: column;
    text-align: center;
  }

  .kg-bookmark-container {
    flex-direction: column;
  }

  .kg-bookmark-thumbnail {
    width: 100%;
    height: 200px;
    order: -1;
  }
}