/* ===========================================
   Personal Blog Design System
   Magazine-style aesthetic with forest green palette
   =========================================== */

/* -------------------------------------------
   Custom Properties (Design Tokens)
   ------------------------------------------- */
:root {
  /* Forest Green Palette */
  --green-900: #1a3a3a;
  --green-700: #2d5a5a;
  --green-500: #3d7a7a;
  --green-300: #5a9a9a;
  --green-100: #d4e8e8;

  /* Warm Beige Palette */
  --beige-50:  #faf8f5;
  --beige-100: #f5f0eb;
  --beige-200: #e8e0d5;
  --beige-300: #d5c9b8;
  --beige-400: #bfaf9a;

  /* Amber Accent Palette */
  --amber-600: #b8652a;
  --amber-500: #c9753e;
  --amber-400: #d48952;
  --amber-300: #e0a070;
  --amber-200: #edc9a8;
  --amber-100: #f7e6d6;

  /* Neutral */
  --white:      #ffffff;
  --black:      #111111;
  --gray-50:    #f9f9f9;
  --gray-100:   #f0f0f0;
  --gray-200:   #e0e0e0;
  --gray-300:   #c0c0c0;
  --gray-400:   #909090;
  --gray-500:   #606060;
  --gray-600:   #404040;
  --gray-700:   #2a2a2a;
  --gray-800:   #1a1a1a;

  /* Typography */
  --font-serif:    'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-sans:     'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono:     'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  /* 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;
  --space-4xl: 6rem;

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

  /* Shadows */
  --shadow-sm:   0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md:   0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg:   0 8px 24px rgba(0, 0, 0, 0.12);
  --shadow-xl:   0 16px 40px rgba(0, 0, 0, 0.16);
  --shadow-card: 0 2px 8px rgba(26, 58, 58, 0.08);

  /* Transitions */
  --transition-fast:   150ms ease;
  --transition-base:   250ms ease;
  --transition-slow:   400ms ease;

  /* Layout */
  --content-max-width: 720px;
  --wide-max-width:    1080px;
  --nav-height:        64px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--gray-700);
  background-color: var(--beige-50);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--green-700);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--amber-500);
}

ul, ol {
  list-style: none;
}

/* -------------------------------------------
   Typography Utilities
   ------------------------------------------- */
.serif {
  font-family: var(--font-serif);
}

.sans {
  font-family: var(--font-sans);
}

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

.text-xs   { font-size: 0.75rem; }
.text-sm   { font-size: 0.875rem; }
.text-base { font-size: 1rem; }
.text-lg   { font-size: 1.125rem; }
.text-xl   { font-size: 1.25rem; }
.text-2xl  { font-size: 1.5rem; }
.text-3xl  { font-size: 1.875rem; }
.text-4xl  { font-size: 2.25rem; }

.font-normal   { font-weight: 400; }
.font-medium   { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold     { font-weight: 700; }

.leading-tight  { line-height: 1.25; }
.leading-normal { line-height: 1.6; }
.leading-relaxed { line-height: 1.8; }

.tracking-wide { letter-spacing: 0.02em; }

/* -------------------------------------------
   Spacing Utilities
   ------------------------------------------- */
.m-0 { margin: 0; }
.mt-1 { margin-top: var(--space-sm); }
.mt-2 { margin-top: var(--space-md); }
.mt-4 { margin-top: var(--space-xl); }
.mt-8 { margin-top: var(--space-2xl); }
.mt-12 { margin-top: var(--space-3xl); }
.mb-1 { margin-bottom: var(--space-sm); }
.mb-2 { margin-bottom: var(--space-md); }
.mb-4 { margin-bottom: var(--space-xl); }
.mb-8 { margin-bottom: var(--space-2xl); }
.mx-auto { margin-left: auto; margin-right: auto; }

.p-2 { padding: var(--space-md); }
.p-4 { padding: var(--space-xl); }
.p-6 { padding: var(--space-2xl); }
.px-2 { padding-left: var(--space-md); padding-right: var(--space-md); }
.px-4 { padding-left: var(--space-xl); padding-right: var(--space-xl); }
.py-1 { padding-top: var(--space-sm); padding-bottom: var(--space-sm); }
.py-2 { padding-top: var(--space-md); padding-bottom: var(--space-md); }
.py-4 { padding-top: var(--space-xl); padding-bottom: var(--space-xl); }

/* -------------------------------------------
   Color Utilities
   ------------------------------------------- */
.text-green    { color: var(--green-700); }
.text-green-light { color: var(--green-300); }
.text-amber    { color: var(--amber-500); }
.text-beige    { color: var(--beige-200); }
.text-gray     { color: var(--gray-400); }
.text-dark     { color: var(--gray-700); }
.text-white    { color: var(--white); }

.bg-green    { background-color: var(--green-900); }
.bg-green-mid { background-color: var(--green-700); }
.bg-beige    { background-color: var(--beige-50); }
.bg-beige-light { background-color: var(--beige-100); }
.bg-beige-dim  { background-color: var(--beige-200); }
.bg-amber    { background-color: var(--amber-500); }
.bg-white    { background-color: var(--white); }

/* -------------------------------------------
   Layout
   ------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--wide-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-xl);
  padding-right: var(--space-xl);
}

.container--narrow {
  max-width: var(--content-max-width);
}

/* -------------------------------------------
   Navigation
   ------------------------------------------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background-color: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--beige-200);
  z-index: 1000;
  transition: box-shadow var(--transition-base);
}

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

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--wide-max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.nav__logo {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--green-900);
  letter-spacing: -0.02em;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.nav__logo:hover {
  color: var(--amber-500);
}

.nav__logo span {
  color: var(--amber-500);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav__link {
  position: relative;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray-500);
  text-decoration: none;
  padding: var(--space-xs) 0;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  transition: color var(--transition-fast);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--amber-500);
  transition: width var(--transition-base);
}

.nav__link:hover {
  color: var(--green-700);
}

.nav__link:hover::after {
  width: 100%;
}

.nav__link--active {
  color: var(--green-700);
}

.nav__link--active::after {
  width: 100%;
  background-color: var(--amber-500);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  gap: 5px;
}

.nav__toggle-line {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--green-900);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.nav__toggle.is-active .nav__toggle-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__toggle.is-active .nav__toggle-line:nth-child(2) {
  opacity: 0;
}

.nav__toggle.is-active .nav__toggle-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* -------------------------------------------
   Hero / Page Header
   ------------------------------------------- */
.hero {
  padding-top: calc(var(--nav-height) + var(--space-4xl));
  padding-bottom: var(--space-4xl);
  text-align: center;
  position: relative;
}

.hero--archive {
  padding-top: calc(var(--nav-height) + var(--space-3xl));
  padding-bottom: var(--space-3xl);
}

.hero__title {
  font-family: var(--font-serif);
  font-size: 3rem;
  font-weight: 700;
  color: var(--green-900);
  line-height: 1.15;
  margin-bottom: var(--space-md);
  letter-spacing: -0.03em;
}

.hero__subtitle {
  font-size: 1.125rem;
  color: var(--gray-400);
  max-width: 540px;
  margin: 0 auto;
  line-height: 1.7;
}

.hero__divider {
  width: 60px;
  height: 3px;
  background-color: var(--amber-500);
  margin: var(--space-lg) auto 0;
  border-radius: 2px;
}

/* -------------------------------------------
   Article List (Cards)
   ------------------------------------------- */
.article-list {
  display: grid;
  gap: var(--space-xl);
  padding-bottom: var(--space-4xl);
}

.article-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.article-card__image {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.article-card__body {
  padding: var(--space-xl) var(--space-xl) var(--space-lg);
}

.article-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-size: 0.8125rem;
  color: var(--gray-400);
  margin-bottom: var(--space-sm);
}

.article-card__date {
  font-family: var(--font-sans);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.article-card__tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--amber-500);
  background-color: var(--amber-100);
  padding: 2px 10px;
  border-radius: var(--radius-full);
}

.article-card__title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--green-900);
  line-height: 1.3;
  margin-bottom: var(--space-sm);
}

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

.article-card__title a:hover {
  color: var(--amber-500);
}

.article-card__excerpt {
  font-size: 0.9375rem;
  color: var(--gray-500);
  line-height: 1.7;
  margin-bottom: var(--space-md);
}

.article-card__read-more {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--amber-500);
  transition: gap var(--transition-fast);
}

.article-card__read-more:hover {
  gap: var(--space-sm);
  color: var(--amber-600);
}

/* -------------------------------------------
   Article Content (Prose Typography)
   ------------------------------------------- */
.article-content {
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--gray-700);
}

.article-content h1,
.article-content h2,
.article-content h3,
.article-content h4 {
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--green-900);
  line-height: 1.3;
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
}

.article-content h1 { font-size: 2.25rem; }
.article-content h2 { font-size: 1.75rem; letter-spacing: -0.02em; }
.article-content h3 { font-size: 1.375rem; }
.article-content h4 { font-size: 1.125rem; }

.article-content p {
  margin-bottom: var(--space-lg);
}

.article-content a {
  color: var(--green-700);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--amber-300);
  transition: text-decoration-color var(--transition-fast);
}

.article-content a:hover {
  text-decoration-color: var(--amber-500);
  color: var(--amber-600);
}

.article-content strong {
  font-weight: 600;
  color: var(--green-900);
}

.article-content em {
  font-style: italic;
}

.article-content ul,
.article-content ol {
  margin-bottom: var(--space-lg);
  padding-left: 1.5em;
}

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

.article-content ol {
  list-style-type: decimal;
}

.article-content li {
  margin-bottom: var(--space-sm);
}

.article-content li::marker {
  color: var(--amber-500);
}

.article-content hr {
  border: none;
  height: 1px;
  background-color: var(--beige-200);
  margin: var(--space-2xl) 0;
}

.article-content img {
  border-radius: var(--radius-md);
  margin: var(--space-xl) 0;
  box-shadow: var(--shadow-md);
}

/* Blockquote */
.article-content blockquote {
  position: relative;
  margin: var(--space-xl) 0;
  padding: var(--space-lg) var(--space-xl);
  padding-left: var(--space-2xl);
  background-color: var(--beige-100);
  border-radius: var(--radius-md);
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-style: italic;
  color: var(--green-700);
  line-height: 1.7;
}

.article-content blockquote::before {
  content: '\201C';
  position: absolute;
  top: var(--space-sm);
  left: var(--space-md);
  font-family: var(--font-serif);
  font-size: 3rem;
  color: var(--amber-400);
  line-height: 1;
}

.article-content blockquote p {
  margin-bottom: 0;
}

.article-content blockquote cite {
  display: block;
  margin-top: var(--space-md);
  font-size: 0.875rem;
  font-style: normal;
  color: var(--gray-400);
  font-family: var(--font-sans);
}

/* Code blocks */
.article-content pre {
  position: relative;
  background-color: var(--green-900);
  color: #e8e0d5;
  border-radius: var(--radius-lg);
  padding: var(--space-lg) var(--space-xl);
  margin: var(--space-xl) 0;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.7;
  box-shadow: var(--shadow-md);
}

.article-content pre code {
  background: none;
  padding: 0;
  font-size: inherit;
  color: inherit;
  border-radius: 0;
}

.article-content code {
  font-family: var(--font-mono);
  font-size: 0.8125em;
  background-color: var(--beige-100);
  color: var(--amber-600);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

/* Markdown Tables */
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-xl) 0;
  font-size: 0.9375rem;
  overflow-x: auto;
  display: block;
}

.article-content thead {
  background-color: var(--green-900);
}

.article-content th {
  font-family: var(--font-sans);
  font-weight: 600;
  color: var(--white);
  text-align: left;
  padding: var(--space-sm) var(--space-md);
  white-space: nowrap;
}

.article-content td {
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--beige-200);
  color: var(--gray-600);
}

.article-content tbody tr {
  transition: background-color var(--transition-fast);
}

.article-content tbody tr:hover {
  background-color: var(--beige-100);
}

.article-content tbody tr:nth-child(even) {
  background-color: var(--beige-50);
}

.article-content tbody tr:nth-child(even):hover {
  background-color: var(--beige-100);
}

/* -------------------------------------------
   Copy Code Button
   ------------------------------------------- */
.code-block-wrapper {
  position: relative;
}

.copy-code-btn {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--beige-200);
  background-color: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-sm);
  cursor: pointer;
  opacity: 0;
  transition: opacity var(--transition-fast), background-color var(--transition-fast);
}

.code-block-wrapper:hover .copy-code-btn {
  opacity: 1;
}

.copy-code-btn:hover {
  background-color: rgba(255, 255, 255, 0.2);
}

.copy-code-btn--copied {
  color: var(--green-300);
  border-color: var(--green-300);
}

/* -------------------------------------------
   Tags / Chips
   ------------------------------------------- */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.tag {
  display: inline-flex;
  align-items: center;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--green-700);
  background-color: var(--beige-100);
  padding: 4px 14px;
  border-radius: var(--radius-full);
  border: 1px solid var(--beige-200);
  transition: all var(--transition-fast);
}

.tag:hover {
  color: var(--amber-500);
  border-color: var(--amber-300);
  background-color: var(--amber-100);
}

.tag--amber {
  color: var(--amber-500);
  background-color: var(--amber-100);
  border-color: var(--amber-200);
}

.tag--count {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.tag__count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--beige-50);
  background-color: var(--green-700);
  border-radius: var(--radius-full);
  padding: 0 6px;
}

/* -------------------------------------------
   Pagination
   ------------------------------------------- */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: var(--space-2xl) 0 var(--space-3xl);
}

.pagination__item {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray-500);
  background-color: var(--white);
  border: 1px solid var(--beige-200);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.pagination__item:hover {
  color: var(--amber-500);
  border-color: var(--amber-300);
  background-color: var(--amber-100);
}

.pagination__item--active {
  color: var(--white);
  background-color: var(--green-700);
  border-color: var(--green-700);
}

.pagination__item--active:hover {
  color: var(--white);
  background-color: var(--green-500);
  border-color: var(--green-500);
}

.pagination__item--prev,
.pagination__item--next {
  padding: 0 var(--space-md);
  gap: var(--space-xs);
}

/* -------------------------------------------
   Timeline (Archive Page)
   ------------------------------------------- */
.timeline {
  position: relative;
  padding: var(--space-xl) 0;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  left: 24px;
  width: 2px;
  height: 100%;
  background: linear-gradient(to bottom, var(--amber-300), var(--beige-200));
}

.timeline__year {
  position: relative;
  margin-bottom: var(--space-2xl);
  padding-left: 56px;
}

.timeline__year-label {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--green-900);
  letter-spacing: -0.02em;
}

.timeline__year-label::before {
  content: '';
  position: absolute;
  left: 16px;
  top: 50%;
  width: 16px;
  height: 16px;
  background-color: var(--amber-500);
  border: 3px solid var(--beige-50);
  border-radius: 50%;
  transform: translateY(-50%);
}

.timeline__items {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.timeline__item {
  position: relative;
  padding-left: 56px;
}

.timeline__item::before {
  content: '';
  position: absolute;
  left: 20px;
  top: 10px;
  width: 8px;
  height: 8px;
  background-color: var(--beige-200);
  border: 2px solid var(--green-300);
  border-radius: 50%;
  transition: all var(--transition-base);
}

.timeline__item:hover::before {
  background-color: var(--amber-400);
  border-color: var(--amber-500);
}

.timeline__date {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--gray-400);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: var(--space-xs);
}

.timeline__title {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--green-700);
  line-height: 1.4;
}

.timeline__title a {
  color: inherit;
}

.timeline__title a:hover {
  color: var(--amber-500);
}

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

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray-600);
  margin-bottom: var(--space-xs);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  color: var(--gray-700);
  background-color: var(--white);
  border: 1px solid var(--beige-200);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--amber-400);
  box-shadow: 0 0 0 3px rgba(201, 117, 62, 0.12);
}

.form-input--error,
.form-textarea--error {
  border-color: #dc3545;
}

.form-input--error:focus,
.form-textarea--error:focus {
  box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.12);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-error {
  display: none;
  font-size: 0.8125rem;
  color: #dc3545;
  margin-top: var(--space-xs);
}

.form-error--visible {
  display: block;
}

.form-hint {
  font-size: 0.8125rem;
  color: var(--gray-400);
  margin-top: var(--space-xs);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 10px 24px;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-base);
}

.btn--primary {
  color: var(--white);
  background-color: var(--green-700);
}

.btn--primary:hover {
  background-color: var(--green-500);
  color: var(--white);
}

.btn--amber {
  color: var(--white);
  background-color: var(--amber-500);
}

.btn--amber:hover {
  background-color: var(--amber-400);
  color: var(--white);
}

.btn--outline {
  color: var(--green-700);
  background-color: transparent;
  border: 1px solid var(--green-700);
}

.btn--outline:hover {
  color: var(--white);
  background-color: var(--green-700);
}

.btn--sm {
  font-size: 0.8125rem;
  padding: 6px 16px;
}

.btn--lg {
  font-size: 1rem;
  padding: 14px 32px;
}

/* -------------------------------------------
   Comments
   ------------------------------------------- */
.comments {
  padding: var(--space-3xl) 0;
}

.comments__title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--green-900);
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-md);
  border-bottom: 2px solid var(--beige-200);
}

.comment {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--beige-100);
}

.comment:last-child {
  border-bottom: none;
}

.comment--reply {
  margin-left: var(--space-3xl);
  padding-left: var(--space-xl);
  border-left: 3px solid var(--amber-200);
}

.comment__avatar {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  overflow: hidden;
  background-color: var(--beige-200);
}

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

.comment__avatar-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--green-100);
  color: var(--green-500);
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1rem;
}

.comment__body {
  flex: 1;
  min-width: 0;
}

.comment__author {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--green-700);
}

.comment__date {
  font-size: 0.8125rem;
  color: var(--gray-400);
  margin-left: var(--space-md);
}

.comment__text {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--gray-600);
  margin-top: var(--space-sm);
}

.comment__actions {
  margin-top: var(--space-sm);
  display: flex;
  gap: var(--space-md);
}

.comment__action {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--gray-400);
  background: none;
  border: none;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.comment__action:hover {
  color: var(--amber-500);
}

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

.comment-form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

/* -------------------------------------------
   Search
   ------------------------------------------- */
.search-form {
  display: flex;
  gap: var(--space-sm);
  max-width: 480px;
}

.search-form__input {
  flex: 1;
  padding: 10px 16px;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  color: var(--gray-700);
  background-color: var(--white);
  border: 1px solid var(--beige-200);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.search-form__input:focus {
  border-color: var(--amber-400);
  box-shadow: 0 0 0 3px rgba(201, 117, 62, 0.12);
}

.search-form__submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--white);
  background-color: var(--green-700);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.search-form__submit:hover {
  background-color: var(--green-500);
}

/* -------------------------------------------
   Reading Progress Bar
   ------------------------------------------- */
.reading-progress {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--amber-500), var(--amber-300));
  z-index: 999;
  transition: width 50ms linear;
}

/* -------------------------------------------
   Footer
   ------------------------------------------- */
.footer {
  background-color: var(--green-900);
  color: var(--beige-200);
  padding: var(--space-3xl) 0 var(--space-xl);
  margin-top: var(--space-4xl);
}

.footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-2xl);
  max-width: var(--wide-max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.footer__brand {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: var(--space-md);
}

.footer__brand span {
  color: var(--amber-400);
}

.footer__description {
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--green-300);
  max-width: 320px;
}

.footer__heading {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--beige-300);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-md);
}

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

.footer__link {
  font-size: 0.875rem;
  color: var(--green-300);
  transition: color var(--transition-fast);
}

.footer__link:hover {
  color: var(--amber-300);
}

.footer__bottom {
  max-width: var(--wide-max-width);
  margin: var(--space-2xl) auto 0;
  padding: var(--space-lg) var(--space-xl) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer__copyright {
  font-size: 0.8125rem;
  color: var(--green-300);
}

/* -------------------------------------------
   Scroll Reveal Animation
   ------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal--visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.6s ease forwards;
}

/* -------------------------------------------
   Mobile Navigation
   ------------------------------------------- */
@media (max-width: 768px) {
  .nav__toggle {
    display: flex;
  }

  .nav__links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--beige-200);
    padding: var(--space-md) 0;
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition-base);
  }

  .nav__links.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav__link {
    display: block;
    padding: var(--space-sm) var(--space-xl);
    font-size: 1rem;
    text-transform: none;
  }

  .nav__link::after {
    display: none;
  }

  .nav__link--active {
    color: var(--amber-500);
    background-color: var(--amber-100);
  }

  /* Hero responsive */
  .hero__title {
    font-size: 2rem;
  }

  .hero__subtitle {
    font-size: 1rem;
  }

  /* Article list single column */
  .article-list {
    grid-template-columns: 1fr;
  }

  /* Footer stack */
  .footer__inner {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .footer__bottom {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }

  /* Comment form rows */
  .comment-form__row {
    grid-template-columns: 1fr;
  }

  .comment--reply {
    margin-left: var(--space-md);
    padding-left: var(--space-md);
  }

  /* Search form */
  .search-form {
    max-width: 100%;
  }

  /* Timeline */
  .timeline::before {
    left: 16px;
  }

  .timeline__year,
  .timeline__item {
    padding-left: 44px;
  }

  .timeline__year-label::before {
    left: 8px;
    width: 14px;
    height: 14px;
  }

  .timeline__item::before {
    left: 12px;
    width: 6px;
    height: 6px;
  }

  /* Tables */
  .article-content table {
    font-size: 0.8125rem;
  }

  .article-content th,
  .article-content td {
    padding: 6px 10px;
  }
}

@media (min-width: 769px) {
  .article-list {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 900px) {
  .article-list {
    grid-template-columns: 1fr;
    max-width: var(--content-max-width);
    margin: 0 auto;
  }
}

/* -------------------------------------------
   Small devices
   ------------------------------------------- */
@media (max-width: 480px) {
  :root {
    --space-xl: 1.25rem;
    --space-2xl: 2rem;
    --space-3xl: 3rem;
  }

  .container {
    padding-left: var(--space-md);
    padding-right: var(--space-md);
  }

  .hero__title {
    font-size: 1.75rem;
  }

  .article-card__title {
    font-size: 1.25rem;
  }
}

/* -------------------------------------------
   Print Styles
   ------------------------------------------- */
@media print {
  .nav,
  .reading-progress,
  .footer,
  .copy-code-btn,
  .pagination {
    display: none !important;
  }

  body {
    background: white;
    color: black;
    font-size: 12pt;
  }

  .article-content {
    line-height: 1.6;
  }

  .article-content a {
    text-decoration: underline;
  }

  .hero {
    padding-top: 0;
  }
}