/* === Theme Variables === */
:root,
[data-theme="light"] {
  --color-bg: #faf8f5;
  --color-bg-gradient: linear-gradient(135deg, #faf8f5 0%, #fef3e2 50%, #fff8f0 100%);
  --color-text: #2d3748;
  --color-heading: #1a202c;
  --color-muted: #5a6a7a;
  --color-light: #8a9ab0;
  --color-card-bg: rgba(255, 255, 255, 0.7);
  --color-card-border: rgba(255, 255, 255, 0.6);
  --color-card-shadow: rgba(200, 150, 50, 0.08);
  --color-card-shadow-hover: rgba(200, 150, 50, 0.18);
  --color-header-bg: rgba(30, 25, 20, 0.88);
  --color-nav-link: #e8e4de;
  --color-nav-hover: #e67e22;
  --color-border: rgba(220, 200, 170, 0.5);
  --color-badge-bg: rgba(230, 126, 34, 0.08);
  --color-badge-text: #d35400;
  --color-placeholder-start: #f39c12;
  --color-placeholder-end: #e74c3c;
  --color-accent-gradient: linear-gradient(135deg, #f1c40f 0%, #e67e22 50%, #e74c3c 100%);
  --color-footer-bg: rgba(30, 25, 20, 0.03);
}

[data-theme="dark"] {
  --color-bg: #1a1510;
  --color-bg-gradient: linear-gradient(135deg, #1a1510 0%, #2a1f14 50%, #1a1208 100%);
  --color-text: #e8e4de;
  --color-heading: #faf6f0;
  --color-muted: #b8a898;
  --color-light: #8a7a6a;
  --color-card-bg: rgba(40, 32, 22, 0.6);
  --color-card-border: rgba(200, 150, 50, 0.15);
  --color-card-shadow: rgba(0, 0, 0, 0.3);
  --color-card-shadow-hover: rgba(230, 126, 34, 0.2);
  --color-header-bg: rgba(20, 16, 10, 0.8);
  --color-nav-link: #d4c8b8;
  --color-nav-hover: #f5a623;
  --color-border: rgba(200, 150, 50, 0.2);
  --color-badge-bg: rgba(245, 166, 35, 0.12);
  --color-badge-text: #f5a623;
  --color-placeholder-start: #f39c12;
  --color-placeholder-end: #e74c3c;
  --color-accent-gradient: linear-gradient(135deg, #f1c40f 0%, #e67e22 50%, #e74c3c 100%);
  --color-footer-bg: rgba(20, 16, 10, 0.5);
}

/* === Reset & Base === */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, sans-serif;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg-gradient);
  background-attachment: fixed;
  min-height: 100vh;
  transition: background 0.3s, color 0.3s;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* === Header & Nav === */
header {
  background: var(--color-header-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 1rem 2rem;
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: background 0.3s;
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, #f1c40f, #e67e22);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 1.5rem;
}

.nav-links a {
  color: var(--color-nav-link);
  font-weight: 500;
  transition: color 0.2s;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: var(--color-accent-gradient);
  border-radius: 1px;
  transition: width 0.3s ease;
}

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

.nav-links a:hover::after {
  width: 100%;
}

/* === Theme Toggle (in footer) === */
.theme-toggle {
  background: none;
  border: 2px solid var(--color-muted);
  border-radius: 50%;
  width: 36px;
  height: 36px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: var(--color-muted);
  margin: 0 auto 0.75rem;
  transition: border-color 0.2s, color 0.2s;
}

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

[data-theme="light"] .theme-icon-dark { display: none; }
[data-theme="light"] .theme-icon-light { display: inline; }
[data-theme="dark"] .theme-icon-light { display: none; }
[data-theme="dark"] .theme-icon-dark { display: inline; }

/* === Hamburger Menu === */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.hamburger-line {
  display: block;
  width: 24px;
  height: 3px;
  background: #fff;
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

/* === Main === */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

/* === Hero (Landing Page) === */
.hero {
  text-align: center;
  padding: 4rem 1rem 3rem;
}

.hero h1 {
  font-size: 2.8rem;
  margin-bottom: 0.5rem;
  color: var(--color-heading);
  background: var(--color-accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.2rem;
  color: var(--color-muted);
}

/* === Section Headings === */
.section-heading {
  font-size: 1.8rem;
  color: var(--color-heading);
  margin-bottom: 1.5rem;
  position: relative;
  display: inline-block;
}

.section-heading::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 40px;
  height: 3px;
  border-radius: 2px;
  background: var(--color-accent-gradient);
}

.recent-articles,
.explore-categories {
  margin-bottom: 3rem;
}

/* === Categories Grid (Landing Page) === */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  padding: 1rem 0;
}

.category-card {
  background: var(--color-card-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--color-card-border);
  border-radius: 16px;
  padding: 2rem;
  text-align: center;
  box-shadow: 0 4px 16px var(--color-card-shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s;
}

.category-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 32px var(--color-card-shadow-hover);
  border-color: var(--color-badge-text);
}

.category-icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
}

.category-card h2 {
  font-size: 1.5rem;
  color: var(--color-heading);
  margin-bottom: 0.5rem;
}

.category-card p {
  color: var(--color-light);
}

/* === Category Page === */
.category-page h1 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  color: var(--color-heading);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.category-page-icon {
  font-size: 1.8rem;
}

.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.post-card {
  background: var(--color-card-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--color-card-border);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 4px 16px var(--color-card-shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s;
  display: flex;
  flex-direction: column;
}

.post-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 32px var(--color-card-shadow-hover);
  border-color: var(--color-badge-text);
}

.post-thumbnail {
  width: 100%;
  height: 140px;
  object-fit: cover;
}

.post-thumbnail.placeholder {
  background: linear-gradient(135deg, var(--color-placeholder-start) 0%, var(--color-placeholder-end) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: #fff;
  font-weight: 700;
  position: relative;
  overflow: hidden;
}

.post-thumbnail.placeholder::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(45deg, transparent 40%, rgba(255, 255, 255, 0.15) 50%, transparent 60%);
  animation: shimmer 3s infinite;
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.post-card-body {
  padding: 1.25rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.post-card-category {
  display: inline-block;
  width: fit-content;
  background: var(--color-badge-bg);
  color: var(--color-badge-text);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.7rem;
  border-radius: 20px;
  margin-bottom: 0.4rem;
  text-transform: capitalize;
  border: 1px solid rgba(230, 126, 34, 0.12);
}

.post-card-body h2 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  color: var(--color-heading);
}

.post-excerpt {
  color: var(--color-muted);
  font-size: 0.9rem;
  flex: 1;
  margin-bottom: 0.75rem;
}

.post-card-body time {
  font-size: 0.8rem;
  color: var(--color-light);
}

.post-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.post-card-author {
  font-size: 0.8rem;
  color: var(--color-muted);
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

/* === Single Post === */
.post-full {
  max-width: 800px;
  margin: 0 auto;
}

.post-hero {
  width: 100%;
  height: 300px;
  object-fit: cover;
  border-radius: 12px;
  margin-bottom: 1.5rem;
}

.post-full h1 {
  font-size: 2.2rem;
  color: var(--color-heading);
  margin-bottom: 0.75rem;
}

.post-meta {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
  font-size: 0.9rem;
  color: var(--color-muted);
}

.post-meta .category {
  background: var(--color-badge-bg);
  color: var(--color-badge-text);
  padding: 0.2rem 0.75rem;
  border-radius: 20px;
  font-weight: 500;
}

.post-content {
  font-size: 1.1rem;
  line-height: 1.8;
}

.post-content h2 {
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  color: var(--color-heading);
}

.post-content ul,
.post-content ol {
  margin-left: 1.5rem;
  margin-bottom: 1rem;
}

.post-content li {
  margin-bottom: 0.4rem;
}

.post-content p {
  margin-bottom: 1rem;
}

.back-link {
  display: inline-block;
  margin-top: 2rem;
  color: var(--color-badge-text);
  font-weight: 500;
}

.back-link:hover {
  text-decoration: underline;
}

/* === Footer === */
footer {
  text-align: center;
  padding: 2.5rem 2rem;
  color: var(--color-light);
  font-size: 0.9rem;
  background: var(--color-footer-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-top: 1px solid var(--color-border);
  margin-top: 3rem;
}

/* === Responsive === */
@media (max-width: 768px) {
  header {
    padding: 1rem;
  }

  nav {
    flex-wrap: wrap;
  }

  .hamburger {
    display: flex;
  }

  .nav-links {
    display: none;
    flex-direction: column;
    width: 100%;
    gap: 0;
    padding-top: 0.75rem;
  }

  .nav-links.nav-open {
    display: flex;
  }

  .nav-links li {
    padding: 0.5rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
  }

  .hero h1 {
    font-size: 1.8rem;
  }

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