/* Reset & Base Styles */
:root {
  /* Light Theme Colors */
  --bg-color: #f8fafc;
  --bg-surface: #ffffff;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --primary: #2563eb;
  /* Deep Blue for Trust/Corporate */
  --primary-hover: #1d4ed8;
  --secondary: #eab308;
  /* Gold/Energetic Accent for Awards/Energy */
  --secondary-hover: #ca8a04;
  --border-color: #e2e8f0;
  --header-bg: rgba(255, 255, 255, 0.9);

  /* Shared */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-serif: 'Merriweather', serif;
  /* For premium article content */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  /* Dark Theme Colors */
  --bg-color: #0f172a;
  --bg-surface: #1e293b;
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  --primary: #3b82f6;
  --primary-hover: #60a5fa;
  --secondary: #facc15;
  --secondary-hover: #fde047;
  --border-color: #334155;
  --header-bg: rgba(30, 41, 59, 0.9);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color var(--transition), color var(--transition);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 0.5em;
  font-family: var(--font-sans);
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

/* Typography Utility */
.text-xs {
  font-size: 0.75rem;
  line-height: 1rem;
}

.text-sm {
  font-size: 0.875rem;
  line-height: 1.25rem;
}

.text-base {
  font-size: 1rem;
  line-height: 1.5rem;
}

.text-lg {
  font-size: 1.125rem;
  line-height: 1.75rem;
}

.text-xl {
  font-size: 1.25rem;
  line-height: 1.75rem;
}

.text-2xl {
  font-size: 1.5rem;
  line-height: 2rem;
}

.text-3xl {
  font-size: 1.875rem;
  line-height: 2.25rem;
}

.text-4xl {
  font-size: 2.25rem;
  line-height: 2.5rem;
}

.font-medium {
  font-weight: 500;
}

.font-semibold {
  font-weight: 600;
}

.font-bold {
  font-weight: 700;
}

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

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

/* Spacing Utility */
.m-0 {
  margin: 0;
}

.mt-1 {
  margin-top: 0.25rem;
}

.mt-2 {
  margin-top: 0.5rem;
}

.mt-4 {
  margin-top: 1rem;
}

.mt-6 {
  margin-top: 1.5rem;
}

.mt-8 {
  margin-top: 2rem;
}

.mt-12 {
  margin-top: 3rem;
}

.mb-1 {
  margin-bottom: 0.25rem;
}

.mb-2 {
  margin-bottom: 0.5rem;
}

.mb-4 {
  margin-bottom: 1rem;
}

.mb-6 {
  margin-bottom: 1.5rem;
}

.mb-8 {
  margin-bottom: 2rem;
}

.mb-12 {
  margin-bottom: 3rem;
}

.my-4 {
  margin-top: 1rem;
  margin-bottom: 1rem;
}

.my-8 {
  margin-top: 2rem;
  margin-bottom: 2rem;
}

.p-4 {
  padding: 1rem;
}

.p-6 {
  padding: 1.5rem;
}

.p-8 {
  padding: 2rem;
}

.px-4 {
  padding-left: 1rem;
  padding-right: 1rem;
}

.py-4 {
  padding-top: 1rem;
  padding-bottom: 1rem;
}

/* Layout Utility */
.container {
  width: 100%;
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1rem;
  padding-right: 1rem;
}

.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

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

.items-start {
  align-items: flex-start;
}

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

.justify-center {
  justify-content: center;
}

.justify-end {
  justify-content: flex-end;
}

.gap-2 {
  gap: 0.5rem;
}

.gap-4 {
  gap: 1rem;
}

.gap-6 {
  gap: 1.5rem;
}

.gap-8 {
  gap: 2rem;
}

.grid {
  display: grid;
}

.grid-cols-1 {
  grid-template-columns: repeat(1, minmax(0, 1fr));
}

.grid-cols-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-cols-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-cols-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

/* Responsive Grid Base */
@media (min-width: 768px) {
  .md\:grid-cols-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .md\:grid-cols-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .lg\:grid-cols-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .lg\:grid-cols-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* Visibility */
.hidden {
  display: none !important;
}

@media (min-width: 768px) {
  .md\:hidden {
    display: none !important;
  }

  .md\:flex {
    display: flex !important;
  }

  .md\:block {
    display: block !important;
  }
}

/* Components */

/* Badge / Category Tag */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background-color: var(--primary);
  color: white;
  transition: var(--transition);
}

.badge:hover {
  background-color: var(--primary-hover);
  color: white;
}

.badge-secondary {
  background-color: var(--secondary);
  color: #000;
}

.badge-secondary:hover {
  background-color: var(--secondary-hover);
  color: #000;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  font-weight: 500;
  transition: var(--transition);
  cursor: pointer;
}

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

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  color: white;
}

.btn-outline {
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  background: transparent;
}

.btn-outline:hover {
  background-color: var(--bg-surface);
  border-color: var(--primary);
  color: var(--primary);
}

/* Cards */
.card {
  background-color: var(--bg-surface);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.card-image-wrapper {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
}

.card-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.card:hover .card-image {
  transform: scale(1.05);
}

.card-content {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: 1rem;
  margin-bottom: 0.5rem;
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: var(--header-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.05);
  border-bottom: 1px solid rgba(226, 232, 240, 0.5);
}

.header-top {
  padding: 1.25rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-logo {
  font-size: 1.75rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-accent {
  color: var(--secondary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.icon-btn {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

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

/* Main Navigation */
.main-nav {
  display: none;
  /* Mobile hidden by default */
  padding: 0 0 0.25rem 0;
}

@media (min-width: 768px) {
  .main-nav {
    display: block;
  }
}

.nav-list {
  display: flex;
  gap: 2.5rem;
  overflow-x: auto;
  /* Allow horizontal scroll if many items */
  padding-bottom: 0px;
  /* Space for scrollbar */
  scrollbar-width: none;
  /* Firefox */
}

.nav-list::-webkit-scrollbar {
  display: none;
  /* Chrome/Safari */
}

.nav-item a {
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 0.95rem;
  padding: 0.5rem 0 0.875rem 0;
  position: relative;
  white-space: nowrap;
  letter-spacing: 0.01em;
}

.nav-item a:hover,
.nav-item a.active {
  color: var(--primary);
}

.nav-item a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 3px;
  background-color: var(--primary);
  border-radius: 3px 3px 0 0;
  transition: width var(--transition);
}

.nav-item a:hover::after,
.nav-item a.active::after {
  width: 100%;
}

/* Mobile Menu Trigger */
.menu-toggle {
  display: block;
}

@media (min-width: 768px) {
  .menu-toggle {
    display: none;
  }
}

/* Mobile Nav Overlay */
.mobile-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background-color: var(--bg-surface);
  z-index: 100;
  padding: 2rem;
  transform: translateX(-100%);
  transition: transform 0.4s ease;
  overflow-y: auto;
}

.mobile-nav.open {
  transform: translateX(0);
}

.mobile-nav-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.mobile-nav-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.mobile-nav-list a {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  display: block;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

/* Footer Element */
.site-footer {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  padding: 4rem 0 2rem;
  margin-top: 4rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
  }
}

.footer-heading {
  font-size: 1.125rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

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

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

.footer-bottom {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  color: var(--text-muted);
  font-size: 0.875rem;
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
  }
}

/* Generic Article Styles for Post Content */
.article-content {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--text-secondary);
}

.article-content p {
  margin-bottom: 1.5rem;
}

.article-content h2 {
  font-family: var(--font-sans);
  font-size: 1.875rem;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.article-content h3 {
  font-family: var(--font-sans);
  font-size: 1.5rem;
  margin-top: 2rem;
  margin-bottom: 1rem;
}

.article-content a {
  text-decoration: underline;
  text-decoration-color: var(--primary);
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

.article-content a:hover {
  background-color: var(--primary);
  color: white;
  text-decoration-color: transparent;
}

.article-content blockquote {
  border-left: 4px solid var(--secondary);
  padding-left: 1.5rem;
  margin: 2rem 0;
  font-style: italic;
  font-size: 1.25rem;
  color: var(--text-primary);
  background-color: var(--bg-surface);
  padding: 1.5rem;
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}

.article-content ul,
.article-content ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
}

.article-content li {
  margin-bottom: 0.5rem;
}

.article-content ul {
  list-style-type: disc;
}

.article-content img {
  border-radius: var(--radius-lg);
  margin: 2rem 0;
  box-shadow: var(--shadow-md);
}

/* Search Modal */
.search-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background-color: var(--header-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.search-modal.active {
  opacity: 1;
  pointer-events: auto;
}

.search-modal-content {
  width: 100%;
  max-width: 600px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
}

/* Author Card Hover Effects */
.author-card {
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  border: 1px solid transparent;
}

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

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

.author-card:hover h3 {
  color: var(--primary);
}