/* ==========================================================================
   Main Frontend Stylesheet — Blog/News CMS
   Black & White Typography-Focused Design
   ========================================================================== */

/* --------------------------------------------------------------------------
   Design Tokens
   -------------------------------------------------------------------------- */

:root {
  --color-black: #0A0A0A;
  --color-white: #FAFAFA;
  --color-gray-100: #F2F2F2;
  --color-gray-200: #E4E4E4;
  --color-gray-400: #A3A3A3;
  --color-gray-600: #525252;
  --color-gray-800: #262626;
  --color-surface: #FFFFFF;

  --font-serif: 'Playfair Display', 'Georgia', serif;
  --font-sans: 'Inter', -apple-system, 'Helvetica Neue', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  /* Fluid type scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.2vw, 0.8rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.3vw, 0.9375rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.0625rem);
  --text-lg: clamp(1.125rem, 1rem + 0.5vw, 1.25rem);
  --text-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 1.3rem + 1vw, 2rem);
  --text-3xl: clamp(1.875rem, 1.5rem + 1.5vw, 2.5rem);
  --text-4xl: clamp(2.25rem, 1.75rem + 2.5vw, 3.5rem);
  --text-5xl: clamp(2.75rem, 2rem + 4vw, 5rem);

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

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

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.12);
}


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

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  text-size-adjust: 100%;
  hanging-punctuation: first last;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  color: var(--color-gray-600);
  background-color: var(--color-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
}

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

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  background: none;
  border: none;
}

ul,
ol {
  list-style: none;
}

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

table {
  border-collapse: collapse;
  width: 100%;
}

hr {
  border: none;
  border-top: 1px solid var(--color-gray-200);
  margin: var(--space-2xl) 0;
}

::selection {
  background-color: var(--color-black);
  color: var(--color-white);
}


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

h1, h2, h3, h4, h5, h6 {
  color: var(--color-black);
  line-height: 1.2;
  font-weight: 700;
}

h1 {
  font-family: var(--font-serif);
  font-size: var(--text-4xl);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

h2 {
  font-family: var(--font-serif);
  font-size: var(--text-3xl);
  letter-spacing: -0.01em;
}

h3 {
  font-family: var(--font-sans);
  font-size: var(--text-2xl);
  font-weight: 600;
}

h4 {
  font-family: var(--font-sans);
  font-size: var(--text-xl);
  font-weight: 600;
}

h5 {
  font-family: var(--font-sans);
  font-size: var(--text-lg);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

h6 {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-gray-600);
}

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

strong, b {
  font-weight: 700;
  color: var(--color-black);
}

em, i {
  font-style: italic;
}

a:not([class]) {
  color: var(--color-black);
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-thickness: 1px;
  transition: text-decoration-color var(--transition-base);
}

a:not([class]):hover {
  text-decoration-thickness: 2px;
}

blockquote {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: var(--text-lg);
  border-left: 3px solid var(--color-black);
  padding-left: var(--space-lg);
  margin: var(--space-xl) 0;
  color: var(--color-gray-800);
}

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

blockquote cite {
  display: block;
  font-family: var(--font-sans);
  font-style: normal;
  font-size: var(--text-sm);
  color: var(--color-gray-400);
  margin-top: var(--space-sm);
}

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background-color: var(--color-gray-100);
  padding: 0.15em 0.4em;
  border-radius: 3px;
}

pre {
  background-color: #546071;
  color: #f0f0f0;
  padding: var(--space-lg);
  border-radius: 4px;
  overflow-x: auto;
  margin: var(--space-xl) 0;
  line-height: 1.7;
}

pre code {
  background: none;
  padding: 0;
  border-radius: 0;
  font-size: var(--text-sm);
  color: inherit;
}

.text-muted {
  color: var(--color-gray-400);
}

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

.text-xs {
  font-size: var(--text-xs);
}

.text-uppercase {
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

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

mark {
  background-color: var(--color-gray-200);
  padding: 0.1em 0.2em;
}

small {
  font-size: var(--text-sm);
}


/* ==========================================================================
   Layout
   ========================================================================== */

.container {
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-lg);
  padding-right: var(--space-lg);
  width: 100%;
}

.container-narrow {
  max-width: 768px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-lg);
  padding-right: var(--space-lg);
  width: 100%;
}

.grid-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-3xl);
  align-items: start;
}

.grid-content > aside {
  position: sticky;
  top: 80px;
  align-self: start;
}

.section {
  padding-top: var(--space-3xl);
  padding-bottom: var(--space-3xl);
}

.section-title {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-gray-400);
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--color-gray-200);
}


/* ==========================================================================
   Prose — Article body typography
   ========================================================================== */

.prose {
  max-width: 68ch;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.8;
  font-size: var(--text-lg);
  color: var(--color-gray-800);
}

.prose p {
  margin-bottom: 1em;
}

.prose h2 {
  font-family: var(--font-sans);
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-top: 3rem;
  margin-bottom: 1rem;
}

.prose h3 {
  font-family: var(--font-sans);
  font-size: var(--text-xl);
  font-weight: 600;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
}

.prose h4 {
  font-family: var(--font-sans);
  font-size: var(--text-lg);
  font-weight: 600;
  margin-top: 2rem;
  margin-bottom: 0.5rem;
}

.prose img {
  max-width: 100%;
  height: auto;
  margin: var(--space-xl) auto;
  display: block;
  border-radius: 2px;
}

.prose figure {
  margin: var(--space-2xl) 0;
}

.prose figcaption {
  font-size: var(--text-sm);
  color: var(--color-gray-400);
  text-align: center;
  margin-top: var(--space-sm);
  font-style: italic;
}

.prose ul,
.prose ol {
  margin-bottom: 1.5em;
  padding-left: 1.5em;
}

.prose ul {
  list-style-type: disc;
}

.prose ol {
  list-style-type: decimal;
}

.prose li {
  margin-bottom: 0.5em;
  padding-left: 0.25em;
}

.prose li::marker {
  color: var(--color-gray-400);
}

.prose blockquote {
  margin: 2em 0;
  padding: var(--space-md) var(--space-lg);
  font-size: var(--text-xl);
}

.prose table {
  margin: var(--space-xl) 0;
  font-size: var(--text-base);
}

.prose table th {
  font-weight: 600;
  text-align: left;
  padding: var(--space-sm) var(--space-md);
  border-bottom: 2px solid var(--color-black);
  color: var(--color-black);
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.prose table td {
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-gray-200);
}

.prose table tr:last-child td {
  border-bottom: none;
}

.prose hr {
  margin: 3em 0;
  border-top: 1px solid var(--color-gray-200);
}

.prose a {
  color: var(--color-black);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: text-decoration-color var(--transition-base);
}

.prose a:hover {
  text-decoration-thickness: 2px;
}


/* ==========================================================================
   Top Bar
   ========================================================================== */

.top-bar {
  background-color: var(--color-black);
  color: var(--color-gray-400);
  font-size: var(--text-xs);
  padding: 6px 0;
}

.top-bar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.top-bar__left {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.top-bar__date {
  color: var(--color-gray-400);
}

.top-bar__right {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.top-bar__social {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.top-bar__social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  color: var(--color-gray-400);
  text-decoration: none;
  transition: color var(--transition-base);
}

.top-bar__social a:hover {
  color: var(--color-white);
}

.top-bar__link {
  color: var(--color-gray-400);
  text-decoration: none;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: color var(--transition-base);
}

.top-bar__link:hover {
  color: var(--color-white);
}


/* ==========================================================================
   Navigation — Site Header
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-gray-200);
  transition: box-shadow var(--transition-base);
}

.site-header.scrolled {
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.site-logo {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-black);
  text-decoration: none;
  letter-spacing: -0.02em;
  line-height: 1;
}

.site-logo:hover {
  opacity: 0.8;
}

.site-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  list-style: none;
}

.nav-link {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-gray-600);
  text-decoration: none;
  padding: var(--space-sm) var(--space-md);
  border-radius: 2px;
  transition: color var(--transition-base), background-color var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-black);
  background-color: var(--color-gray-100);
}

.nav-link--search {
  display: inline-flex;
  align-items: center;
  padding: var(--space-sm);
}

.nav-link--login {
  display: inline-flex;
  align-items: center;
  font-size: var(--text-xs);
  font-weight: 600;
  color: #fff !important;
  background: var(--color-black);
  padding: 6px 16px;
  border-radius: 6px;
  transition: background var(--transition-base), transform 0.15s ease;
}

.nav-link--login:hover {
  background: var(--color-gray-800);
  transform: translateY(-1px);
}

/* Dropdown Menus */
.nav-item--dropdown {
  position: relative;
}

.nav-item--dropdown .nav-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.dropdown-arrow {
  transition: transform 0.2s ease;
}

.nav-item--dropdown:hover .dropdown-arrow {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background: #fff;
  border: 1px solid var(--color-gray-200);
  box-shadow: var(--shadow-md);
  list-style: none;
  padding: 0.35rem 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  z-index: 200;
}

.nav-item--dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-link {
  display: block;
  padding: 0.55rem 1rem;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-gray-600);
  text-decoration: none;
  transition: background 0.15s ease, color 0.15s ease;
}

.dropdown-link:hover {
  background: var(--color-gray-100);
  color: var(--color-black);
}

/* Mobile overlay child items */
.nav-overlay__link--child {
  padding-left: 2.5rem;
  font-size: 0.88rem;
  color: var(--color-gray-500);
}

.nav-overlay__link--child:hover {
  padding-left: 2.75rem;
}

/* Hamburger / Mobile Nav Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 28px;
  height: 28px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 110;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-black);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Full-screen mobile overlay */
.nav-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  visibility: hidden;
  pointer-events: none;
}

.nav-overlay.active {
  visibility: visible;
  pointer-events: auto;
}

/* Backdrop */
.nav-overlay__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  opacity: 0;
  transition: opacity 0.3s ease;
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
}

.nav-overlay.active .nav-overlay__backdrop {
  opacity: 1;
}

/* Slide-in panel */
.nav-overlay__panel {
  position: absolute;
  top: 0;
  right: 0;
  width: 300px;
  max-width: 85vw;
  height: 100%;
  background: #fff;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: -8px 0 30px rgba(0, 0, 0, 0.15);
}

.nav-overlay.active .nav-overlay__panel {
  transform: translateX(0);
}

/* Panel header */
.nav-overlay__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--color-gray-200);
}

.nav-overlay__brand {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-black);
}

.nav-overlay__close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  background: var(--color-gray-100);
  color: var(--color-black);
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
}

.nav-overlay__close:hover {
  background: var(--color-gray-200);
  transform: rotate(90deg);
}

/* Navigation links */
.nav-overlay__links {
  flex: 1;
  overflow-y: auto;
  padding: 0.75rem 0;
}

.nav-overlay__link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0.8rem 1.25rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-gray-700);
  text-decoration: none;
  transition: background 0.2s, color 0.2s, padding-left 0.2s;
  border-left: 3px solid transparent;
}

.nav-overlay__link:hover {
  background: var(--color-gray-100);
  color: var(--color-black);
  padding-left: 1.5rem;
  border-left-color: var(--color-black);
}

.nav-overlay__link svg {
  flex-shrink: 0;
  color: var(--color-gray-400);
  transition: color 0.2s;
}

.nav-overlay__link:hover svg {
  color: var(--color-black);
}

/* Panel footer */
.nav-overlay__footer {
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--color-gray-200);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.nav-overlay__login-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0.65rem 1rem;
  background: var(--color-black);
  color: #fff;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 8px;
  text-decoration: none;
  transition: background 0.2s, transform 0.15s;
}

.nav-overlay__login-btn:hover {
  background: var(--color-gray-800);
  transform: translateY(-1px);
}

.nav-overlay__social {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}

.nav-overlay__social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-gray-100);
  color: var(--color-gray-600);
  transition: background 0.2s, color 0.2s, transform 0.2s;
}

.nav-overlay__social a:hover {
  background: var(--color-black);
  color: #fff;
  transform: translateY(-2px);
}


/* ==========================================================================
   Hero Banner (Settings-controlled image)
   ========================================================================== */

.hero-banner {
  width: 100%;
  height: 400px;
  overflow: hidden;
  position: relative;
}

.hero-banner__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

@media (max-width: 768px) {
  .hero-banner {
    height: 220px;
  }
}


/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero {
  position: relative;
  overflow: hidden;
  min-height: 70vh;
  display: flex;
  align-items: flex-end;
}

/* No-image variant: elegant gradient background */
.hero--no-image {
  min-height: auto;
  background: var(--color-black);
  align-items: center;
}

.hero--no-image .hero__content {
  padding: var(--space-3xl) 0;
  max-width: 680px;
}

.hero__image {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.hero__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  background: linear-gradient(
    to top,
    rgba(0, 0, 0, 0.85) 0%,
    rgba(0, 0, 0, 0.4) 50%,
    rgba(0, 0, 0, 0.15) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 3;
  padding: var(--space-3xl) 0;
  width: 100%;
  max-width: 720px;
}

.hero__category {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-black);
  background-color: var(--color-white);
  padding: 4px 12px;
  border-radius: 2px;
  text-decoration: none;
  margin-bottom: var(--space-lg);
  transition: opacity var(--transition-base);
}

.hero__category:hover {
  opacity: 0.85;
}

.hero__title {
  font-family: var(--font-serif);
  font-size: var(--text-5xl);
  font-weight: 700;
  color: var(--color-surface);
  line-height: 1.1;
  margin-bottom: var(--space-md);
}

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

.hero__title a:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 2px;
}

.hero__excerpt {
  font-size: var(--text-lg);
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.6;
  margin-bottom: var(--space-lg);
  max-width: 560px;
}

.hero__meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: var(--space-lg);
}

.hero__meta span + span::before {
  content: '\00B7';
  margin-right: var(--space-md);
}

.hero__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-white);
  text-decoration: none;
  padding: 12px 24px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.hero__cta:hover {
  background-color: var(--color-white);
  color: var(--color-black);
  border-color: var(--color-white);
}

.hero__cta svg {
  transition: transform var(--transition-base);
}

.hero__cta:hover svg {
  transform: translateX(3px);
}


/* ==========================================================================
   Post Cards
   ========================================================================== */

.post-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-gray-200);
  border-radius: 2px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

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

.post-card__image {
  position: relative;
  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(1.03);
}

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

.post-card__category {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-gray-400);
  margin-bottom: var(--space-sm);
}

.post-card__title {
  font-family: 'Inter', sans-serif; 
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-black);
  line-height: 1.3;
  margin-bottom: var(--space-sm);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-card__title a {
  color: inherit;
  text-decoration: none;
}

.post-card__title a:hover {
  text-decoration: underline;
  text-underline-offset: 2px;
}

.post-card__excerpt {
  font-size: var(--text-sm);
  color: var(--color-gray-600);
  line-height: 1.6;
  margin-bottom: var(--space-lg);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.post-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-xs);
  color: var(--color-gray-400);
  margin-top: auto;
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-gray-100);
}

.post-card__avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.post-card__author {
  font-weight: 500;
  color: var(--color-gray-800);
}

.post-card__meta-sep::before {
  content: '\00B7';
}


/* ==========================================================================
   Post Grid
   ========================================================================== */

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


/* ==========================================================================
   Article Header
   ========================================================================== */

.article-header {
  padding-top: var(--space-3xl);
  padding-bottom: var(--space-xl);
  text-align: center;
}

.article-header__category {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-gray-400);
  margin-bottom: var(--space-md);
  display: inline-block;
}

.article-header__title {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  font-size: 2.5rem;
  font-weight: 500;
  color: var(--color-black);
  line-height: 1.25;
  margin-bottom: var(--space-lg);
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
}

.article-header__meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  font-size: var(--text-sm);
  color: var(--color-gray-400);
  flex-wrap: wrap;
}

.article-header__meta span + span::before {
  content: '\00B7';
  margin-right: var(--space-md);
}

.article-header__image {
  width: 100%;
  max-height: 500px;
  object-fit: cover;
  margin-top: var(--space-2xl);
  border-radius: 2px;
}


/* ==========================================================================
   Article Content
   ========================================================================== */

.article-content {
  padding-bottom: var(--space-3xl);
}


/* ==========================================================================
   Table of Contents (Sidebar)
   ========================================================================== */

.toc {
  position: sticky;
  top: 88px;
}

.toc__title {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-gray-400);
  margin-bottom: var(--space-md);
}

.toc__list {
  border-left: 1px solid var(--color-gray-200);
}

.toc__link {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-gray-400);
  text-decoration: none;
  padding: var(--space-xs) 0 var(--space-xs) var(--space-md);
  border-left: 2px solid transparent;
  margin-left: -1px;
  transition: color var(--transition-base), border-color var(--transition-base);
}

.toc__link:hover {
  color: var(--color-gray-800);
}

.toc__link.active {
  color: var(--color-black);
  border-left-color: var(--color-black);
  font-weight: 500;
}

.toc__link--nested {
  padding-left: calc(var(--space-md) + var(--space-md));
  font-size: var(--text-xs);
}


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

.sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

/* --- Sidebar Widget Base --- */

.sidebar-widget {
  background-color: var(--color-surface);
  border: 1px solid var(--color-gray-200);
  border-radius: 6px;
  padding: var(--space-lg);
}

.sidebar-widget__title {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-black);
  padding-bottom: var(--space-md);
  border-bottom: 2px solid var(--color-black);
  margin-bottom: var(--space-lg);
}

.sidebar-widget__title svg {
  flex-shrink: 0;
  opacity: 0.5;
}

/* --- Category List --- */

.sidebar-category-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sidebar-category-list li + li {
  border-top: 1px solid var(--color-gray-100);
}

.sidebar-category-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  text-decoration: none;
  color: var(--color-gray-600);
  font-size: var(--text-sm);
  transition: color var(--transition-base), padding-left var(--transition-base);
}

.sidebar-category-link:hover {
  color: var(--color-black);
  padding-left: 6px;
}

.sidebar-category-name {
  font-weight: 500;
}

.sidebar-category-count {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-gray-400);
  background-color: var(--color-gray-100);
  padding: 2px 8px;
  border-radius: 100px;
  min-width: 24px;
  text-align: center;
}

.sidebar-category-link:hover .sidebar-category-count {
  background-color: var(--color-black);
  color: var(--color-white);
}

/* --- Tag Cloud --- */

.sidebar-tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.sidebar-tag {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-gray-600);
  text-decoration: none;
  background-color: var(--color-gray-100);
  padding: 5px 12px;
  border-radius: 100px;
  transition: all var(--transition-base);
}

.sidebar-tag__hash {
  color: var(--color-gray-400);
  margin-right: 1px;
  transition: color var(--transition-base);
}

.sidebar-tag:hover {
  background-color: var(--color-black);
  color: var(--color-white);
}

.sidebar-tag:hover .sidebar-tag__hash {
  color: rgba(255, 255, 255, 0.5);
}

/* --- Archive List --- */

.sidebar-archive-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sidebar-archive-list li + li {
  border-top: 1px solid var(--color-gray-100);
}

.sidebar-archive-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  text-decoration: none;
  color: var(--color-gray-600);
  font-size: var(--text-sm);
  transition: color var(--transition-base);
}

.sidebar-archive-link:hover {
  color: var(--color-black);
}

.sidebar-archive-count {
  font-size: var(--text-xs);
  color: var(--color-gray-400);
}

/* --- Newsletter Widget --- */

.sidebar-newsletter {
  background-color: var(--color-black);
  border-color: var(--color-black);
  text-align: center;
  padding: var(--space-xl) var(--space-lg);
}

.sidebar-newsletter__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--color-white);
  margin-bottom: var(--space-md);
}

.sidebar-newsletter__title {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--space-sm);
}

.sidebar-newsletter__text {
  font-size: var(--text-sm);
  color: var(--color-gray-400);
  line-height: 1.6;
  margin-bottom: var(--space-lg);
}

.sidebar-newsletter__alert {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 10px 12px;
  border-radius: 4px;
  font-size: var(--text-sm);
  line-height: 1.4;
  margin-bottom: var(--space-md);
  text-align: left;
}

.sidebar-newsletter__alert svg {
  flex-shrink: 0;
  margin-top: 1px;
}

.sidebar-newsletter__alert--success {
  background-color: rgba(34, 197, 94, 0.15);
  border: 1px solid rgba(34, 197, 94, 0.3);
  color: #86efac;
}

.sidebar-newsletter__alert--error {
  background-color: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #fca5a5;
}

.sidebar-newsletter__form {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.sidebar-newsletter__input {
  width: 100%;
  padding: 10px 14px;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 4px;
  outline: none;
  transition: border-color var(--transition-base), background-color var(--transition-base);
}

.sidebar-newsletter__input::placeholder {
  color: var(--color-gray-600);
}

.sidebar-newsletter__input:focus {
  border-color: rgba(255, 255, 255, 0.4);
  background-color: rgba(255, 255, 255, 0.15);
}

.sidebar-newsletter__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  width: 100%;
  padding: 10px 20px;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-black);
  background-color: var(--color-white);
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.sidebar-newsletter__btn:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.sidebar-newsletter__btn svg {
  transition: transform var(--transition-base);
}

.sidebar-newsletter__btn:hover svg {
  transform: translateX(2px);
}

/* Trending / Numbered list */
.trending-list {
  counter-reset: trending;
}

.trending-list__item {
  counter-increment: trending;
  display: flex;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-gray-100);
}

.trending-list__item:last-child {
  border-bottom: none;
}

.trending-list__item::before {
  content: counter(trending, decimal-leading-zero);
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-gray-200);
  flex-shrink: 0;
  line-height: 1.2;
}

.trending-list__link {
  font-family: var(--font-serif);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-black);
  text-decoration: none;
  line-height: 1.4;
  transition: opacity var(--transition-base);
}

.trending-list__link:hover {
  opacity: 0.7;
}

.trending-list__date {
  display: block;
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  color: var(--color-gray-400);
  margin-top: 2px;
}

/* Tag Cloud */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

/* Archive List */
.archive-list__item {
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-gray-100);
}

.archive-list__item:last-child {
  border-bottom: none;
}

.archive-list__link {
  display: flex;
  justify-content: space-between;
  font-size: var(--text-sm);
  color: var(--color-gray-600);
  text-decoration: none;
  transition: color var(--transition-base);
}

.archive-list__link:hover {
  color: var(--color-black);
}

.archive-list__count {
  color: var(--color-gray-400);
  font-size: var(--text-xs);
}


/* ==========================================================================
   Comments Section
   ========================================================================== */

.comments-section {
  padding-top: var(--space-2xl);
  border-top: 1px solid var(--color-gray-200);
}

.comments-section__title {
  font-family: var(--font-sans);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-black);
  margin-bottom: var(--space-xl);
}

.comment {
  border-left: 2px solid var(--color-gray-200);
  padding-left: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.comment__header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.comment__author {
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--color-black);
}

.comment__date {
  font-size: var(--text-xs);
  color: var(--color-gray-400);
}

.comment__body {
  font-size: var(--text-base);
  color: var(--color-gray-600);
  line-height: 1.7;
}

.comment__body p:last-child {
  margin-bottom: 0;
}

.comment__reply-btn {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-gray-400);
  background: none;
  border: none;
  cursor: pointer;
  margin-top: var(--space-sm);
  transition: color var(--transition-base);
}

.comment__reply-btn:hover {
  color: var(--color-black);
}

/* Threaded replies */
.comment__replies {
  margin-left: var(--space-xl);
  margin-top: var(--space-lg);
}

/* Comment Form */
.comment-form {
  margin-top: var(--space-2xl);
}

/* ==========================================================================
   Download Box
   ========================================================================== */

.download-box {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-lg) var(--space-xl);
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  border: 2px solid var(--color-gray-200);
  border-radius: 8px;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.download-box:hover {
  border-color: var(--color-black);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.download-box__icon {
  flex-shrink: 0;
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-black);
  color: #fff;
  border-radius: 8px;
}

.download-box__info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.download-box__label {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-gray-500);
}

.download-box__name {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-black);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.download-box__btn {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: var(--space-sm) var(--space-lg);
  background: var(--color-black);
  color: #fff;
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  border-radius: 4px;
  transition: background var(--transition-base), transform 0.1s ease;
}

.download-box__btn:hover {
  background: #222;
  color: #fff;
  transform: translateY(-1px);
}

.download-box__btn:active {
  transform: translateY(0);
}

@media (max-width: 600px) {
  .download-box {
    flex-direction: column;
    text-align: center;
    gap: var(--space-sm);
    padding: var(--space-lg);
  }

  .download-box__name {
    white-space: normal;
  }

  .download-box__btn {
    width: 100%;
    justify-content: center;
  }
}

.comment-form__title {
  font-family: var(--font-sans);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-black);
  margin-bottom: var(--space-lg);
}

.form-group {
  margin-bottom: var(--space-lg);
}

.form-group label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-gray-800);
  margin-bottom: var(--space-xs);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--text-base);
  border: 1px solid var(--color-gray-200);
  border-radius: 2px;
  background-color: var(--color-surface);
  color: var(--color-black);
  transition: border-color var(--transition-base);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-black);
}

.form-textarea {
  min-height: 140px;
  resize: vertical;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}


/* ==========================================================================
   Author Bio
   ========================================================================== */

.author-bio {
  display: flex;
  align-items: flex-start;
  gap: var(--space-lg);
  padding: var(--space-xl);
  border: 1px solid var(--color-gray-200);
  border-radius: 2px;
  margin: var(--space-2xl) 0;
}

.author-bio__avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.author-bio__info {
  flex: 1;
}

.author-bio__name {
  font-family: var(--font-sans);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-black);
  margin-bottom: var(--space-xs);
}

.author-bio__text {
  font-size: var(--text-sm);
  color: var(--color-gray-600);
  line-height: 1.6;
  margin-bottom: var(--space-sm);
}

.author-bio__social {
  display: flex;
  gap: var(--space-md);
}

.author-bio__social a {
  font-size: var(--text-sm);
  color: var(--color-gray-400);
  text-decoration: none;
  transition: color var(--transition-base);
}

.author-bio__social a:hover {
  color: var(--color-black);
}


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

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  font-size: var(--text-sm);
  color: var(--color-gray-400);
  padding: var(--space-md) 0;
}

.breadcrumb__item {
  display: inline-flex;
  align-items: center;
}

.breadcrumb__item + .breadcrumb__item::before {
  content: '/';
  margin: 0 var(--space-sm);
  color: var(--color-gray-200);
}

.breadcrumb__link {
  color: var(--color-gray-400);
  text-decoration: none;
  transition: color var(--transition-base);
}

.breadcrumb__link:hover {
  color: var(--color-black);
}

.breadcrumb__current {
  color: var(--color-gray-600);
}


/* ==========================================================================
   Pagination
   ========================================================================== */

.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: var(--space-2xl) 0;
}

.pagination__item {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 var(--space-sm);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-gray-600);
  text-decoration: none;
  border-radius: 2px;
  transition: background-color var(--transition-base), color var(--transition-base);
}

.pagination__item:hover {
  background-color: var(--color-gray-100);
  color: var(--color-black);
}

.pagination__item.active {
  background-color: var(--color-black);
  color: var(--color-white);
}

.pagination__item.disabled {
  opacity: 0.3;
  pointer-events: none;
}

.pagination__ellipsis {
  min-width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
  color: var(--color-gray-400);
}


/* ==========================================================================
   Search Page
   ========================================================================== */

.search-bar {
  display: flex;
  border: 1px solid var(--color-gray-200);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: var(--space-2xl);
  transition: border-color var(--transition-base);
}

.search-bar:focus-within {
  border-color: var(--color-black);
}

.search-bar__input {
  flex: 1;
  padding: var(--space-md) var(--space-lg);
  font-size: var(--text-lg);
  border: none;
  background: none;
  color: var(--color-black);
}

.search-bar__input:focus {
  outline: none;
}

.search-bar__input::placeholder {
  color: var(--color-gray-400);
}

.search-bar__button {
  padding: var(--space-md) var(--space-xl);
  background-color: var(--color-black);
  color: var(--color-white);
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border: none;
  cursor: pointer;
  transition: background-color var(--transition-base);
}

.search-bar__button:hover {
  background-color: var(--color-gray-800);
}

.search-results__count {
  font-size: var(--text-sm);
  color: var(--color-gray-400);
  margin-bottom: var(--space-xl);
}

.search-result {
  padding: var(--space-xl) 0;
  border-bottom: 1px solid var(--color-gray-100);
}

.search-result:first-child {
  padding-top: 0;
}

.search-result__title {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-black);
  margin-bottom: var(--space-xs);
}

.search-result__title a {
  text-decoration: none;
  color: inherit;
}

.search-result__title a:hover {
  text-decoration: underline;
  text-underline-offset: 2px;
}

.search-result__excerpt {
  font-size: var(--text-sm);
  color: var(--color-gray-600);
  line-height: 1.6;
  margin-bottom: var(--space-sm);
}

.search-result__meta {
  font-size: var(--text-xs);
  color: var(--color-gray-400);
}


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

.site-footer {
  background-color: var(--color-black);
  color: var(--color-gray-400);
  padding: var(--space-3xl) 0 0;
  margin-top: var(--space-3xl);
}

.footer-main {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
  padding-bottom: var(--space-2xl);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-white);
  text-decoration: none;
  display: inline-block;
  margin-bottom: var(--space-md);
}

.footer-logo:hover {
  opacity: 0.8;
}

.footer-desc {
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-gray-400);
  margin-bottom: var(--space-lg);
  max-width: 320px;
}

.footer-social {
  display: flex;
  gap: var(--space-sm);
}

.footer-social .social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--color-gray-400);
  text-decoration: none;
  transition: all var(--transition-base);
}

.footer-social .social-link:hover {
  color: var(--color-white);
  border-color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.1);
}

.footer-social .social-link svg {
  width: 16px;
  height: 16px;
}

.footer-heading {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-white);
  margin-bottom: var(--space-lg);
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  margin-bottom: var(--space-sm);
}

.footer-links a {
  font-size: var(--text-sm);
  color: var(--color-gray-400);
  text-decoration: none;
  transition: color var(--transition-base);
}

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

.footer-bottom {
  padding: var(--space-lg) 0;
  text-align: center;
  font-size: var(--text-xs);
  color: var(--color-gray-600);
}


/* ==========================================================================
   Social Share Buttons
   ========================================================================== */

.share-buttons {
  display: flex;
  gap: var(--space-sm);
  align-items: center;
}

.share-buttons__label {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-gray-400);
  margin-right: var(--space-sm);
}

.share-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-gray-200);
  border-radius: 2px;
  color: var(--color-black);
  text-decoration: none;
  transition: background-color var(--transition-base), color var(--transition-base),
              border-color var(--transition-base);
}

.share-btn:hover {
  background-color: var(--color-black);
  border-color: var(--color-black);
  color: var(--color-white);
}

.share-btn svg {
  width: 16px;
  height: 16px;
}


/* ==========================================================================
   Tag Badges
   ========================================================================== */

.tag-badge {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-gray-600);
  text-decoration: none;
  border: 1px solid var(--color-gray-200);
  border-radius: 100px;
  padding: 0.2em 0.75em;
  transition: border-color var(--transition-base), color var(--transition-base);
}

.tag-badge:hover {
  border-color: var(--color-black);
  color: var(--color-black);
}


/* ==========================================================================
   Category Label
   ========================================================================== */

.category-label {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-gray-400);
}

.category-label a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-base);
}

.category-label a:hover {
  color: var(--color-black);
}


/* ==========================================================================
   Reading Time
   ========================================================================== */

.reading-time {
  font-size: var(--text-sm);
  color: var(--color-gray-400);
}


/* ==========================================================================
   Buttons (General)
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-decoration: none;
  padding: 0.75em 1.5em;
  border: 1px solid var(--color-black);
  border-radius: 2px;
  cursor: pointer;
  transition: background-color var(--transition-base), color var(--transition-base);
}

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

.btn-primary:hover {
  background-color: var(--color-gray-800);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-black);
}

.btn-outline:hover {
  background-color: var(--color-black);
  color: var(--color-white);
}

.btn-sm {
  font-size: var(--text-xs);
  padding: 0.5em 1em;
}

.btn-lg {
  font-size: var(--text-base);
  padding: 1em 2em;
}


/* ==========================================================================
   Utility Classes
   ========================================================================== */

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.separator {
  border: none;
  border-top: 1px solid var(--color-gray-200);
  margin: var(--space-2xl) 0;
}

.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }
.mt-3xl { margin-top: var(--space-3xl); }

.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.mb-2xl { margin-bottom: var(--space-2xl); }


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

@media print {
  *,
  *::before,
  *::after {
    background: transparent !important;
    color: #000 !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }

  body {
    font-size: 12pt;
    line-height: 1.5;
  }

  .site-header,
  .site-footer,
  .sidebar-widget,
  .toc,
  .comments-section .comment-form,
  .share-buttons,
  .nav-toggle,
  .nav-overlay,
  .top-bar,
  .pagination,
  .search-bar {
    display: none !important;
  }

  .container,
  .container-narrow {
    max-width: 100%;
    padding: 0;
  }

  .grid-content {
    display: block;
  }

  a[href]::after {
    content: ' (' attr(href) ')';
    font-size: 0.8em;
    color: #666 !important;
  }

  a[href^="#"]::after,
  a[href^="javascript"]::after {
    content: '';
  }

  img {
    max-width: 100% !important;
    page-break-inside: avoid;
  }

  h1, h2, h3 {
    page-break-after: avoid;
  }

  .article-content {
    max-width: 100%;
  }

  .prose {
    max-width: 100%;
    font-size: 11pt;
  }

  pre, blockquote {
    page-break-inside: avoid;
    border: 1px solid #999;
  }

  pre {
    background: #f4f4f4 !important;
    color: #000 !important;
  }
}


/* ==========================================================================
   Responsive — Tablet (max-width: 1024px)
   ========================================================================== */

@media (max-width: 1024px) {
  .grid-content {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  .hero {
    min-height: 50vh;
  }

  .hero--no-image .hero__content {
    padding: var(--space-2xl) 0;
  }

  .hero__title {
    font-size: 3rem;
  }

  .hero__excerpt {
    font-size: var(--text-base);
  }

  .post-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-lg);
  }

  .sidebar {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
  }

  .sidebar-newsletter {
    grid-column: 1 / -1;
  }

  .article-header__title {
    font-size: 32px;
  }

  .toc {
    position: static;
    margin-bottom: var(--space-xl);
    padding: var(--space-lg);
    border: 1px solid var(--color-gray-200);
    border-radius: 2px;
  }
}


/* ==========================================================================
   Responsive — Mobile (max-width: 768px)
   ========================================================================== */

@media (max-width: 768px) {

  /* Top Bar */
  .top-bar__date {
    display: none;
  }

  .top-bar__right {
    width: 100%;
    justify-content: space-between;
  }

  /* Navigation */
  .site-nav {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .header-inner {
    height: 56px;
  }

  /* Hero */
  .hero {
    min-height: 40vh;
  }

  .hero--no-image .hero__content {
    padding: var(--space-xl) 0;
  }

  .hero__title {
    font-size: var(--text-3xl);
  }

  .hero__content {
    padding: var(--space-xl) 0;
  }

  .hero__excerpt {
    display: none;
  }

  .hero__meta {
    flex-wrap: wrap;
    gap: var(--space-sm);
  }

  /* Post Grid */
  .post-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  /* Article */
  .article-header {
    padding-top: var(--space-xl);
    text-align: left;
  }

  .article-header__title {
    font-size: 28px;
  }

  .article-header__meta {
    justify-content: flex-start;
  }

  .article-header__image {
    max-height: 300px;
  }

  .prose {
    font-size: var(--text-base);
  }

  .prose h2 {
    font-size: var(--text-xl);
    margin-top: 2rem;
  }

  .prose h3 {
    font-size: var(--text-lg);
    margin-top: 1.5rem;
  }

  .prose blockquote {
    font-size: var(--text-lg);
    padding-left: var(--space-md);
  }

  /* Author Bio */
  .author-bio {
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--space-lg);
  }

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

  /* Comments */
  .comment__replies {
    margin-left: var(--space-md);
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  /* Footer */
  .footer-main {
    grid-template-columns: 1fr 1fr;
  }

  .footer-col--about {
    grid-column: 1 / -1;
  }

  /* Pagination */
  .pagination {
    gap: 2px;
  }

  .pagination__item {
    min-width: 36px;
    height: 36px;
  }

  /* Share Buttons */
  .share-buttons {
    flex-wrap: wrap;
  }

  /* Search */
  .search-bar {
    flex-direction: column;
  }

  .search-bar__button {
    padding: var(--space-md);
  }

  /* Sidebar: single column on mobile */
  .sidebar {
    grid-template-columns: 1fr;
  }

  .sidebar-newsletter {
    grid-column: auto;
  }
}


/* ==========================================================================
   Flash Messages (Frontend)
   ========================================================================== */

.flash-message {
  margin-bottom: var(--space-lg);
  border-radius: 8px;
  overflow: hidden;
  animation: flashSlideIn 0.4s ease-out;
}

@keyframes flashSlideIn {
  from { opacity: 0; transform: translateY(-12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.flash-message__inner {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  border-radius: 8px;
  font-size: var(--text-sm);
  line-height: 1.5;
}

.flash-message--success .flash-message__inner {
  background: linear-gradient(135deg, #ecfdf5, #d1fae5);
  border: 1px solid #6ee7b7;
  color: #065f46;
}

.flash-message--error .flash-message__inner {
  background: linear-gradient(135deg, #fef2f2, #fee2e2);
  border: 1px solid #fca5a5;
  color: #991b1b;
}

.flash-message__icon {
  flex-shrink: 0;
  margin-top: 1px;
}

.flash-message--success .flash-message__icon { color: #059669; }
.flash-message--error .flash-message__icon   { color: #dc2626; }

.flash-message__text {
  flex: 1;
  font-weight: 500;
}

.flash-message__close {
  flex-shrink: 0;
  background: none;
  border: none;
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  padding: 0 2px;
  opacity: 0.5;
  transition: opacity 0.2s;
}

.flash-message__close:hover { opacity: 1; }
.flash-message--success .flash-message__close { color: #065f46; }
.flash-message--error .flash-message__close   { color: #991b1b; }

/* Contact-specific success state — replaces the form with a thank-you card */
.contact-success-card {
  max-width: 640px;
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-xl);
  text-align: center;
  background: linear-gradient(135deg, #ecfdf5 0%, #d1fae5 100%);
  border: 1px solid #6ee7b7;
  border-radius: 12px;
  animation: flashSlideIn 0.5s ease-out;
}

.contact-success-card .success-icon-ring {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: #d1fae5;
  border: 3px solid #6ee7b7;
  margin-bottom: var(--space-lg);
  animation: successPop 0.5s ease-out 0.2s both;
}

@keyframes successPop {
  0%   { transform: scale(0.5); opacity: 0; }
  60%  { transform: scale(1.1); }
  100% { transform: scale(1); opacity: 1; }
}

.contact-success-card .success-icon-ring svg {
  color: #059669;
}

.contact-success-card h2 {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  color: #065f46;
  margin: 0 0 var(--space-sm) 0;
}

.contact-success-card p {
  color: #047857;
  font-size: var(--text-base);
  margin: 0 0 var(--space-lg) 0;
  max-width: 420px;
  margin-left: auto;
  margin-right: auto;
}

.contact-success-card .btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: var(--space-xs) var(--space-lg);
  border: 2px solid #059669;
  color: #059669;
  background: transparent;
  border-radius: 6px;
  font-weight: 600;
  font-size: var(--text-sm);
  text-decoration: none;
  transition: all 0.2s;
}

.contact-success-card .btn-outline:hover {
  background: #059669;
  color: #fff;
}

/* ==========================================================================
   Contact Form
   ========================================================================== */

.contact-form-wrapper {
  max-width: 640px;
  margin: 0 auto;
  padding: var(--space-xl) var(--space-2xl);
  background: var(--color-surface);
  border: 1px solid var(--color-gray-200);
  border-radius: 4px;
}

.contact-form .form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.contact-form .form-group label span {
  color: var(--color-primary);
}

.contact-form .btn-primary {
  padding: var(--space-sm) var(--space-xl);
  font-size: var(--text-base);
}

@media (max-width: 600px) {
  .contact-form-wrapper {
    padding: var(--space-lg);
  }
  .contact-form .form-row {
    grid-template-columns: 1fr;
  }
}


/* ==========================================================================
   Ad Containers
   ========================================================================== */

.ad-container {
  text-align: center;
  margin: var(--space-lg) auto;
  max-width: 100%;
  overflow: hidden;
}

.ad-container__label {
  display: block;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-gray-400);
  margin-bottom: var(--space-xs);
}

.ad-container__content {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
}

/* Header banner: full width below nav */
.ad-container[data-ad-slot="header_banner"] {
  padding: var(--space-sm) 0;
  background: var(--color-gray-50);
  border-bottom: 1px solid var(--color-gray-100);
  margin: 0;
}

/* In-feed ad between posts */
.ad-container--in-feed {
  grid-column: 1 / -1;
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--color-gray-100);
  border-bottom: 1px solid var(--color-gray-100);
  margin: 0;
}

/* In-article ad */
.ad-container--in-article {
  margin: var(--space-xl) auto;
  padding: var(--space-md) 0;
}

/* After content ad */
.ad-container--after-content {
  max-width: var(--container-narrow-width, 720px);
  margin: 0 auto;
  padding: var(--space-lg) var(--space-md);
}

/* ==========================================================================
   Reduced Motion
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ==========================================================================
   Download Box
   ========================================================================== */

.download-box {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-gray-200);
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.download-box:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.download-box__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--color-gray-100);
  color: var(--color-black);
  flex-shrink: 0;
}

.download-box__info {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.download-box__label {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  color: var(--color-gray-400);
  letter-spacing: 0.05em;
  margin-bottom: 2px;
}

.download-box__name {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-black);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.download-box__btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  background-color: var(--color-black);
  color: var(--color-white) !important;
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: 8px;
  text-decoration: none !important;
  transition: background-color var(--transition-base), transform 0.15s ease;
  flex-shrink: 0;
}

.download-box__btn:hover {
  background-color: var(--color-gray-800);
  transform: scale(1.02);
}

@media (max-width: 600px) {
  .download-box {
    flex-direction: column;
    text-align: center;
    gap: var(--space-sm);
  }
  .download-box__btn {
    width: 100%;
    justify-content: center;
    margin-top: var(--space-sm);
  }
}