/* ========================================================================
   Odoo Expertos — Design System
   Premium editorial CSS · ERP consultancy aesthetic · Technical magazine
   ======================================================================== */

/* --- Variables --- */
:root {
  /* Colors */
  --color-bg: #0b1420;
  --color-bg-alt: #111d2e;
  --color-bg-card: #142134;
  --color-bg-hover: #1a2d44;
  --color-border: #1e3550;
  --color-border-light: #2a4a6a;

  --color-text: #e2e8f0;
  --color-text-heading: #f1f5f9;
  --color-text-muted: #94a3b8;
  --color-text-dim: #64748b;

  --color-accent: #00c853;
  --color-accent-hover: #00e676;
  --color-accent-dim: rgba(0, 200, 83, 0.12);
  --color-accent-glow: rgba(0, 200, 83, 0.25);

  --color-link: #60a5fa;
  --color-link-hover: #93c5fd;
  --color-warning: #fbbf24;
  --color-error: #f87171;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --font-serif: Georgia, "Times New Roman", serif;

  /* Layout */
  --max-width: 1200px;
  --content-width: 740px;
  --wide-width: 960px;
  --nav-height: 64px;

  /* 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;

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

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

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  min-height: 100vh;
}

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

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

ul, ol {
  list-style: none;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-text-heading);
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2rem, 4vw, 3rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }
h4 { font-size: 1.125rem; }

p {
  margin-bottom: var(--space-lg);
  max-width: 65ch;
}

.text-muted { color: var(--color-text-muted); }
.text-dim { color: var(--color-text-dim); }
.text-accent { color: var(--color-accent); }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.text-serif { font-family: var(--font-serif); }
.text-mono { font-family: var(--font-mono); }

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

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

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

/* === NAVIGATION === */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(11, 20, 32, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
}

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

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-heading);
  letter-spacing: -0.03em;
}
.nav__logo:hover { color: var(--color-text-heading); }
.nav__logo-mark {
  width: 32px;
  height: 32px;
  background: var(--color-accent);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.875rem;
  color: var(--color-bg);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}
.nav__link {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}
.nav__link:hover,
.nav__link--active {
  color: var(--color-text-heading);
}
.nav__link--active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-accent);
  border-radius: 1px;
}

.nav__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.5rem 1rem;
  background: var(--color-accent);
  color: var(--color-bg);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.875rem;
  transition: background var(--transition-fast), transform var(--transition-fast);
}
.nav__cta:hover {
  background: var(--color-accent-hover);
  color: var(--color-bg);
  transform: translateY(-1px);
}

.nav__toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-text);
  font-size: 1.5rem;
  cursor: pointer;
  padding: var(--space-sm);
}

@media (max-width: 768px) {
  .nav__links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--color-bg-alt);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: var(--space-lg);
    gap: var(--space-lg);
  }
  .nav__links--open {
    display: flex;
  }
  .nav__toggle {
    display: block;
  }
}

/* === HERO === */
.hero {
  padding: calc(var(--nav-height) + var(--space-4xl)) 0 var(--space-4xl);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--color-accent-dim) 0%, transparent 70%);
  pointer-events: none;
}
.hero__tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--color-accent-dim);
  color: var(--color-accent);
  padding: 0.375rem 0.875rem;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  margin-bottom: var(--space-lg);
  border: 1px solid rgba(0, 200, 83, 0.2);
}
.hero__title {
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  margin-bottom: var(--space-lg);
  max-width: 14ch;
}
.hero__subtitle {
  font-size: clamp(1.05rem, 1.5vw, 1.2rem);
  color: var(--color-text-muted);
  max-width: 55ch;
  line-height: 1.8;
  margin-bottom: var(--space-xl);
}
.hero__actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.925rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  text-decoration: none;
}
.btn--primary {
  background: var(--color-accent);
  color: var(--color-bg);
}
.btn--primary:hover {
  background: var(--color-accent-hover);
  color: var(--color-bg);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px var(--color-accent-glow);
}
.btn--secondary {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn--secondary:hover {
  border-color: var(--color-text-muted);
  background: var(--color-bg-hover);
}
.btn--ghost {
  background: transparent;
  color: var(--color-link);
  padding: 0.75rem 1rem;
}
.btn--ghost:hover {
  background: rgba(96, 165, 250, 0.08);
}

/* === FEATURED/SECTION === */
.section {
  padding: var(--space-4xl) 0;
}
.section--alt {
  background: var(--color-bg-alt);
}
.section__header {
  margin-bottom: var(--space-3xl);
}
.section__label {
  text-transform: uppercase;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}
.section__title {
  margin-bottom: var(--space-md);
}
.section__description {
  color: var(--color-text-muted);
  max-width: 50ch;
  font-size: 1.05rem;
}

/* --- Grids --- */
.grid {
  display: grid;
  gap: var(--space-xl);
}
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
  .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
}

/* --- Cards --- */
.card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: all var(--transition-base);
}
.card:hover {
  border-color: var(--color-border-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}
.card__image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: var(--color-bg-alt);
}
.card__body {
  padding: var(--space-lg);
}
.card__category {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}
.card__title {
  font-size: 1.125rem;
  margin-bottom: var(--space-sm);
  line-height: 1.4;
}
.card__title a {
  color: var(--color-text-heading);
}
.card__title a:hover {
  color: var(--color-accent);
}
.card__excerpt {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: var(--space-md);
}
.card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-size: 0.8rem;
  color: var(--color-text-dim);
}
.card__read-time::before {
  content: '·';
  margin-right: var(--space-md);
}

/* --- Article Card (horizontal) --- */
.article-card {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: var(--space-xl);
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--color-border);
}
.article-card:last-child {
  border-bottom: none;
}
.article-card__image {
  width: 240px;
  height: 160px;
  border-radius: var(--radius-md);
  object-fit: cover;
  background: var(--color-bg-alt);
}
.article-card__body {
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.article-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-size: 0.8rem;
  color: var(--color-text-dim);
  margin-bottom: var(--space-sm);
}
.article-card__title {
  font-size: 1.25rem;
  margin-bottom: var(--space-sm);
}
.article-card__title a {
  color: var(--color-text-heading);
}
.article-card__title a:hover {
  color: var(--color-accent);
}
.article-card__excerpt {
  color: var(--color-text-muted);
  font-size: 0.925rem;
  line-height: 1.7;
}

@media (max-width: 768px) {
  .article-card {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
  .article-card__image {
    width: 100%;
    height: 200px;
  }
}

/* === BLOG ARTICLE === */
.article {
  padding: calc(var(--nav-height) + var(--space-3xl)) 0 var(--space-3xl);
}
.article__header {
  margin-bottom: var(--space-3xl);
}
.article__breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.85rem;
  color: var(--color-text-dim);
  margin-bottom: var(--space-lg);
}
.article__breadcrumb a {
  color: var(--color-text-dim);
}
.article__breadcrumb a:hover {
  color: var(--color-text);
}
.article__category {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}
.article__title {
  margin-bottom: var(--space-lg);
  max-width: 18ch;
}
.article__meta {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  color: var(--color-text-dim);
  font-size: 0.9rem;
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-xl);
}
.article__meta-author {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}
.article__meta-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.8rem;
  color: var(--color-accent);
}

.article__content {
  font-size: 1.05rem;
  line-height: 1.85;
  max-width: var(--content-width);
  margin: 0 auto;
}
.article__content h2 {
  margin-top: var(--space-3xl);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--color-border);
}
.article__content h3 {
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
}
.article__content p {
  margin-bottom: var(--space-lg);
  max-width: 65ch;
}
.article__content ul,
.article__content ol {
  margin-bottom: var(--space-lg);
  padding-left: var(--space-xl);
}
.article__content ul { list-style: disc; }
.article__content ol { list-style: decimal; }
.article__content li {
  margin-bottom: var(--space-sm);
  line-height: 1.7;
}
.article__content strong {
  color: var(--color-text-heading);
}
.article__content code {
  font-family: var(--font-mono);
  background: var(--color-bg-alt);
  padding: 0.125rem 0.375rem;
  border-radius: var(--radius-sm);
  font-size: 0.875em;
  border: 1px solid var(--color-border);
}
.article__content pre {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  overflow-x: auto;
  margin-bottom: var(--space-lg);
  font-size: 0.875rem;
  line-height: 1.6;
}
.article__content pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: inherit;
}

/* Blockquote */
.article__content blockquote {
  border-left: 3px solid var(--color-accent);
  padding-left: var(--space-lg);
  margin: var(--space-2xl) 0;
  font-style: italic;
  color: var(--color-text-muted);
}

/* Callout box */
.article__content .callout {
  background: var(--color-accent-dim);
  border: 1px solid rgba(0, 200, 83, 0.2);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin: var(--space-2xl) 0;
}
.article__content .callout strong {
  color: var(--color-accent);
}

/* Table */
.article__content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--space-lg);
  font-size: 0.925rem;
}
.article__content th,
.article__content td {
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border);
  text-align: left;
}
.article__content th {
  background: var(--color-bg-alt);
  font-weight: 600;
  color: var(--color-text-heading);
}

/* Image within article */
.article__content img {
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  margin: var(--space-xl) 0;
  width: 100%;
}

/* Article footer */
.article__footer {
  max-width: var(--content-width);
  margin: var(--space-3xl) auto 0;
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
}
.article__footer-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
}
.article__footer-tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}
.article__footer-tag:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* === TCO Box (article content) === */
.tco-box {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-xl) var(--space-2xl);
  margin: var(--space-2xl) 0;
}
.tco-box h3 {
  color: var(--color-accent);
  margin-top: 0;
}
.tco-box hr {
  border: none;
  border-top: 1px solid var(--color-border-light);
  margin: var(--space-lg) 0;
}

/* === Comparison Table (article content) === */
.article__content .comparativa {
  overflow-x: auto;
  margin: var(--space-2xl) 0;
}
.article__content .comparativa table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.925rem;
  min-width: 640px;
}
.article__content .comparativa th {
  background: var(--color-bg-alt);
  color: var(--color-text-heading);
  padding: 14px 12px;
  text-align: left;
  font-weight: 600;
  border: 1px solid var(--color-border);
}
.article__content .comparativa td {
  padding: 12px;
  border: 1px solid var(--color-border);
  vertical-align: top;
}
.article__content .comparativa tr:nth-child(even) td {
  background: rgba(0, 0, 0, 0.15);
}
.article__content .comparativa .winner {
  background: rgba(0, 200, 83, 0.12) !important;
  font-weight: 600;
  color: var(--color-accent);
}

/* === CTA Box within articles === */
.cta-box {
  background: linear-gradient(135deg, var(--color-bg-alt), var(--color-bg-card));
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-xl) var(--space-2xl);
  margin: var(--space-3xl) auto;
  max-width: var(--content-width);
}
.cta-box__title {
  font-size: 1.25rem;
  margin-bottom: var(--space-sm);
}
.cta-box__text {
  color: var(--color-text-muted);
  font-size: 0.925rem;
  margin-bottom: var(--space-lg);
  max-width: 50ch;
}

/* --- Sidebar --- */
.sidebar {
  position: sticky;
  top: calc(var(--nav-height) + var(--space-xl));
}
.sidebar__widget {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
}
.sidebar__widget-title {
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--color-border);
}
.sidebar__link {
  display: block;
  padding: var(--space-sm) 0;
  font-size: 0.9rem;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
}
.sidebar__link:last-child {
  border-bottom: none;
}
.sidebar__link:hover {
  color: var(--color-accent);
}

/* === ABOUT / CONTACT === */
.page-header {
  padding: calc(var(--nav-height) + var(--space-4xl)) 0 var(--space-3xl);
}
.page-header__title {
  margin-bottom: var(--space-md);
}
.page-header__subtitle {
  color: var(--color-text-muted);
  font-size: 1.1rem;
  max-width: 50ch;
}

.content-page {
  padding: 0 0 var(--space-4xl);
}
.content-page p {
  max-width: 65ch;
}

.contact-form {
  max-width: 600px;
}
.form-group {
  margin-bottom: var(--space-lg);
}
.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 0.925rem;
  transition: border-color var(--transition-fast);
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-dim);
}
.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

/* === FOOTER === */
.footer {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  padding: var(--space-3xl) 0 var(--space-xl);
}
.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-3xl);
}
.footer__brand {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text-heading);
  margin-bottom: var(--space-sm);
}
.footer__description {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  max-width: 35ch;
  line-height: 1.7;
}
.footer__heading {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}
.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}
.footer__link {
  font-size: 0.9rem;
  color: var(--color-text-dim);
}
.footer__link:hover {
  color: var(--color-text);
}
.footer__bottom {
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
  font-size: 0.8rem;
  color: var(--color-text-dim);
}

@media (max-width: 768px) {
  .footer__grid {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 480px) {
  .footer__grid {
    grid-template-columns: 1fr;
  }
  .footer__bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* === BLOG LIST === */
.blog-header {
  padding: calc(var(--nav-height) + var(--space-3xl)) 0 var(--space-2xl);
}
.blog-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--space-3xl);
  padding-bottom: var(--space-4xl);
}

@media (max-width: 900px) {
  .blog-layout {
    grid-template-columns: 1fr;
  }
  .sidebar {
    order: -1;
  }
}

/* === CATEGORY BADGE === */
.category-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.25rem 0.75rem;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.category-badge--tutorial { background: rgba(96, 165, 250, 0.12); color: #60a5fa; }
.category-badge--guide     { background: rgba(0, 200, 83, 0.12); color: var(--color-accent); }
.category-badge--comparison{ background: rgba(251, 191, 36, 0.12); color: var(--color-warning); }
.category-badge--news      { background: rgba(248, 113, 113, 0.12); color: var(--color-error); }

/* === TOC === */
.toc {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin: var(--space-2xl) 0;
}
.toc__title {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}
.toc__list {
  list-style: none;
  padding: 0;
}
.toc__item {
  margin-bottom: var(--space-sm);
}
.toc__link {
  font-size: 0.9rem;
  color: var(--color-link);
}
.toc__link:hover {
  color: var(--color-link-hover);
}

/* === UTILITY === */
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-md); }
.mt-2 { margin-top: var(--space-xl); }
.mt-3 { margin-top: var(--space-2xl); }
.mt-4 { margin-top: var(--space-3xl); }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-md); }
.mb-2 { margin-bottom: var(--space-xl); }
.mb-3 { margin-bottom: var(--space-2xl); }
.mb-4 { margin-bottom: var(--space-3xl); }

/* === PAGINATION === */
.pagination {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  margin-top: var(--space-3xl);
}
.pagination__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  color: var(--color-text);
  transition: all var(--transition-fast);
}
.pagination__link:hover,
.pagination__link--active {
  border-color: var(--color-accent);
  background: var(--color-accent-dim);
  color: var(--color-accent);
}

/* === TAG CLOUD === */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}
.tag-cloud__item {
  padding: 0.25rem 0.75rem;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
}
.tag-cloud__item:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* === LOADING / TRANSITIONS === */
.fade-in {
  animation: fadeIn 0.5s ease forwards;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* === TABLES ON MOBILE === */
@media (max-width: 768px) {
  .article__content table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch;
  }
  .article__meta {
    flex-wrap: wrap;
    gap: var(--space-sm);
  }
}

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

/* === PRINT === */
@media print {
  .nav, .footer, .sidebar, .cta-box { display: none; }
  body { background: white; color: black; }
  a { color: inherit; }
}

/* === NEWSLETTER === */
.newsletter {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  margin: var(--space-2xl) 0;
}
.newsletter__title {
  margin-bottom: var(--space-sm);
}
.newsletter__text {
  color: var(--color-text-muted);
  font-size: 0.925rem;
  margin-bottom: var(--space-lg);
  max-width: 50ch;
}
.newsletter__form {
  display: flex;
  gap: var(--space-sm);
  max-width: 480px;
}
.newsletter__input {
  flex: 1;
  padding: 0.625rem 1rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: 0.9rem;
}
.newsletter__input:focus {
  outline: none;
  border-color: var(--color-accent);
}
@media (max-width: 480px) {
  .newsletter__form {
    flex-direction: column;
  }
}

/* === AUTHOR BOX === */
.author-box {
  display: flex;
  gap: var(--space-lg);
  align-items: flex-start;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin: var(--space-2xl) 0;
}
.author-box__avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--color-accent);
  flex-shrink: 0;
  font-size: 1.125rem;
}
.author-box__name {
  font-weight: 600;
  margin-bottom: var(--space-xs);
}
.author-box__role {
  font-size: 0.8rem;
  color: var(--color-text-dim);
  margin-bottom: var(--space-sm);
}
.author-box__bio {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}