/* ============================================================
   VĚDA.cz — Clean Editorial Science Magazine
   Design system: light, flat, image-driven, high-tech
   ============================================================ */

/* ============================================================
   1. CSS CUSTOM PROPERTIES
   ============================================================ */
:root {
  /* Colors */
  --color-bg:            #FFFFFF;
  --color-bg-section:    #F4F6F8;
  --color-bg-card:       #FFFFFF;
  --color-bg-sidebar:    #F8FAFC;
  --color-bg-tray:       #0F172A;
  --color-bg-footer:     #0F172A;
  --color-bg-overlay:    rgba(15, 23, 42, 0.96);

  --color-text-heading:  #0F172A;
  --color-text-body:     #334155;
  --color-text-muted:    #64748B;
  --color-text-inverse:  #FFFFFF;

  --color-primary:       #2563EB;
  --color-primary-dark:  #1D4ED8;
  --color-primary-light: #DBEAFE;
  --color-cyan:          #06B6D4;
  --color-cyan-light:    #CFFAFE;
  --color-violet:        #7C3AED;
  --color-violet-light:  #EDE9FE;

  --color-border:        #E2E8F0;
  --color-border-strong: #CBD5E1;

  --color-progress:      #2563EB;

  /* Typography */
  --font-ui:             'Space Grotesk', 'Inter', system-ui, sans-serif;
  --font-body:           'Inter', system-ui, sans-serif;
  --font-reading:        'Lora', Georgia, serif;

  --text-xs:             0.75rem;
  --text-sm:             0.875rem;
  --text-base:           1rem;
  --text-md:             1.125rem;
  --text-lg:             1.25rem;
  --text-xl:             1.5rem;
  --text-2xl:            1.875rem;
  --text-3xl:            2.25rem;
  --text-4xl:            3rem;

  --weight-regular:      400;
  --weight-medium:       500;
  --weight-semibold:     600;
  --weight-bold:         700;

  --leading-tight:       1.2;
  --leading-snug:        1.4;
  --leading-normal:      1.6;
  --leading-relaxed:     1.75;
  --leading-reading:     1.82;

  /* Spacing */
  --space-1:   0.25rem;
  --space-2:   0.5rem;
  --space-3:   0.75rem;
  --space-4:   1rem;
  --space-5:   1.25rem;
  --space-6:   1.5rem;
  --space-8:   2rem;
  --space-10:  2.5rem;
  --space-12:  3rem;
  --space-16:  4rem;
  --space-20:  5rem;
  --space-24:  6rem;

  /* Layout */
  --container-max:       1280px;
  --container-pad:       var(--space-6);
  --content-max:         720px;
  --sidebar-width:       300px;
  --gap-grid:            var(--space-6);

  /* Borders & Radii */
  --radius-sm:    6px;
  --radius-md:    12px;
  --radius-lg:    16px;
  --radius-pill:  100px;

  /* Shadows */
  --shadow-card:    0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-card-hover: 0 8px 24px rgba(15, 23, 42, 0.10), 0 2px 6px rgba(15, 23, 42, 0.06);
  --shadow-header:  0 1px 0 var(--color-border);
  --shadow-toc:     0 0 0 1px var(--color-border), 0 2px 8px rgba(15,23,42,0.06);

  /* Transitions */
  --transition-fast:   0.18s ease;
  --transition-base:   0.25s ease;
  --transition-slow:   0.35s ease;

  /* Gradients */
  --gradient-hero-overlay: linear-gradient(to top, rgba(15,23,42,0.72) 0%, rgba(15,23,42,0.2) 60%, transparent 100%);
  --gradient-logo: linear-gradient(90deg, #2563EB 0%, #7C3AED 100%);
  --gradient-accent-bar: linear-gradient(90deg, #2563EB, #06B6D4);
  --gradient-section-band: linear-gradient(180deg, #F4F6F8 0%, #FFFFFF 100%);
}

/* ============================================================
   2. RESET & BASE
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-body);
  background-color: var(--color-bg);
  line-height: var(--leading-normal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
  font: inherit;
}

/* ============================================================
   3. READING PROGRESS BAR
   ============================================================ */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: var(--gradient-accent-bar);
  z-index: 9999;
  transition: width 0.1s linear;
}

/* ============================================================
   4. WRAPPER
   ============================================================ */
.wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ============================================================
   5. HEADER & LOGO
   ============================================================ */
.header {
  position: sticky;
  top: 0;
  z-index: 200;
  background-color: var(--color-bg);
  box-shadow: var(--shadow-header);
  transition: box-shadow var(--transition-base);
}

.header.is-scrolled {
  box-shadow: 0 2px 12px rgba(15,23,42,0.10);
}

.header__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-4) var(--container-pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

/* Logo */
.header__logo {
  flex-shrink: 0;
}

.header__logo a {
  display: flex;
  align-items: center;
  text-decoration: none;
  font-family: var(--font-ui);
  font-weight: var(--weight-bold);
  font-size: var(--text-xl);
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--color-text-heading);
}

.header__logo img {
  height: 36px;
  width: auto;
}

/* Text wordmark — used when no logo image */
.header__logo a:not(:has(img)) {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
}

/* Nav inside header (logo mode) */
.header .nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.header .nav ul li a {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-body);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-pill);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.header .nav ul li a:hover {
  color: var(--color-primary);
  background-color: var(--color-primary-light);
}

/* Hamburger toggle */
.header__toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  color: var(--color-text-heading);
  transition: background-color var(--transition-fast);
}

.header__toggle:hover {
  background-color: var(--color-bg-section);
}

.header__toggle svg {
  stroke: currentColor;
}

/* ============================================================
   6. CATEGORY TRAY (top menu mode)
   ============================================================ */
.tray {
  background-color: var(--color-bg-section);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 61px;
  z-index: 190;
}

.tray__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-3) var(--container-pad);
}

.tray__inner ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
  gap: var(--space-2);
}

.tray__inner ul li {
  display: flex;
}

.tray__inner ul li a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  color: var(--color-text-heading);
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  text-align: center;
  white-space: nowrap;
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
  letter-spacing: 0.01em;
}

.tray__inner ul li a:hover {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  border-color: var(--color-primary);
}

/* ============================================================
   7. MOBILE NAV (smallnav)
   ============================================================ */
.smallnav {
  position: fixed;
  inset: 0;
  z-index: 500;
  background-color: var(--color-bg-overlay);
  padding: var(--space-8) var(--space-6);
  overflow-y: auto;
}

.smallnav__close {
  position: absolute;
  top: var(--space-5);
  right: var(--space-5);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--color-text-inverse);
  transition: background-color var(--transition-fast);
}

.smallnav__close:hover {
  background-color: rgba(255,255,255,0.12);
}

.smallnav__close svg {
  stroke: currentColor;
}

.smallnav ul {
  margin-top: var(--space-12);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.smallnav ul li a {
  display: block;
  padding: var(--space-4) var(--space-5);
  font-family: var(--font-ui);
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  color: var(--color-text-inverse);
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast), color var(--transition-fast);
  letter-spacing: -0.01em;
}

.smallnav ul li a:hover {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

/* ============================================================
   8. MAIN LAYOUT
   ============================================================ */
.main {
  flex: 1;
  padding: var(--space-10) 0;
}

.main__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
}

/* With sidebar */
@media (min-width: 1024px) {
  .main__inner {
    grid-template-columns: 1fr var(--sidebar-width);
    align-items: start;
  }
}

.content {
  min-width: 0;
}

/* ============================================================
   9. TOP ARTICLES (Hero section)
   ============================================================ */
.top {
  background-color: var(--color-bg-section);
  padding: var(--space-8) 0;
  border-bottom: 1px solid var(--color-border);
}

.top__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

/* Hero layout: first article large left, rest 2x2 right */
@media (min-width: 768px) {
  .top__inner {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto;
  }

  .top__inner .article:first-child {
    grid-column: 1;
    grid-row: 1 / 3;
  }

  .top__inner .article:not(:first-child) {
    grid-column: 2;
  }
}

@media (min-width: 1024px) {
  .top__inner {
    grid-template-columns: 3fr 2fr;
  }

  .top__inner .article:not(:first-child) {
    grid-column: 2;
  }
}

/* Right column 2x2 grid */
@media (min-width: 768px) {
  .top__inner .article:nth-child(2),
  .top__inner .article:nth-child(3),
  .top__inner .article:nth-child(4),
  .top__inner .article:nth-child(5) {
    grid-column: 2;
  }
}

/* ============================================================
   10. ARTICLE CARDS (shared)
   ============================================================ */
.article {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
  box-shadow: var(--shadow-card);
}

.article:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-3px);
}

/* Card image */
.article__image {
  margin: 0;
  flex-shrink: 0;
  overflow: hidden;
}

.article__image a {
  display: block;
}

.article__image img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
  transition: transform var(--transition-slow);
}

.article:hover .article__image img {
  transform: scale(1.04);
}

/* Card body */
.article__body {
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  flex: 1;
}

/* Category pill */
.article__category {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin: 0;
}

.article__category a {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  color: var(--color-primary);
  background-color: var(--color-primary-light);
  border-radius: var(--radius-pill);
  letter-spacing: 0.03em;
  text-transform: uppercase;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.article__category a:hover {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

/* Article title */
.article__title {
  font-family: var(--font-ui);
  font-size: var(--text-md);
  font-weight: var(--weight-bold);
  color: var(--color-text-heading);
  line-height: var(--leading-snug);
  letter-spacing: -0.02em;
  margin: 0;
}

.article__title a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* Perex */
.article__perex {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: var(--leading-normal);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin: 0;
}

/* Date */
.article__date {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin: 0;
  margin-top: auto;
  padding-top: var(--space-2);
}

/* ============================================================
   11. TOP HERO — first article large
   ============================================================ */
.top__inner .article:first-child {
  position: relative;
  min-height: 400px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--color-text-heading);
}

.top__inner .article:first-child .article__image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.top__inner .article:first-child .article__image a {
  height: 100%;
}

.top__inner .article:first-child .article__image img {
  width: 100%;
  height: 100%;
  aspect-ratio: unset;
  object-fit: cover;
}

.top__inner .article:first-child .article__body {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--gradient-hero-overlay);
  padding: var(--space-8) var(--space-6) var(--space-6);
  gap: var(--space-3);
}

.top__inner .article:first-child .article__title {
  font-size: clamp(var(--text-xl), 3vw, var(--text-3xl));
  color: var(--color-text-inverse);
  letter-spacing: -0.03em;
}

.top__inner .article:first-child .article__title a {
  color: var(--color-text-inverse);
}

.top__inner .article:first-child .article__title a:hover {
  color: var(--color-cyan-light);
}

.top__inner .article:first-child .article__perex {
  color: rgba(255,255,255,0.82);
  font-size: var(--text-base);
  -webkit-line-clamp: 2;
}

.top__inner .article:first-child .article__date {
  color: rgba(255,255,255,0.65);
}

.top__inner .article:first-child .article__category a {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

.top__inner .article:first-child .article__category a:hover {
  background-color: var(--color-cyan);
}

/* Smaller hero cards (right side) */
.top__inner .article:not(:first-child) .article__image img {
  aspect-ratio: 4 / 3;
}

.top__inner .article:not(:first-child) .article__body {
  padding: var(--space-4);
  gap: var(--space-2);
}

.top__inner .article:not(:first-child) .article__title {
  font-size: var(--text-base);
}

.top__inner .article:not(:first-child) .article__perex {
  display: none;
}

/* ============================================================
   12. POST LIST GRID
   ============================================================ */
.articles {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap-grid);
}

@media (min-width: 600px) {
  .articles {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .articles {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Cards in main grid: image takes top ~60% */
.articles .article__image img {
  aspect-ratio: 16 / 9;
}

.articles .article .article__body {
  flex: 1;
}

/* Fade-in animation for cards */
.article.is-visible {
  animation: fadeInUp 0.45s var(--transition-base) both;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================================
   13. PAGE H1
   ============================================================ */
.page-h1 {
  font-family: var(--font-ui);
  font-size: clamp(var(--text-2xl), 4vw, var(--text-4xl));
  font-weight: var(--weight-bold);
  color: var(--color-text-heading);
  letter-spacing: -0.03em;
  line-height: var(--leading-tight);
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-5);
  border-bottom: 2px solid var(--color-border);
}

.section-heading {
  font-family: var(--font-ui);
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: var(--color-text-heading);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--color-border);
}

/* ============================================================
   14. BOTTOM SECTION (similar/category posts)
   ============================================================ */
.bottom {
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 2px solid var(--color-border);
}

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

@media (min-width: 600px) {
  .bottom__inner {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .bottom__inner {
    grid-template-columns: repeat(3, 1fr);
  }
}

.bottom__inner .article__image img {
  aspect-ratio: 16 / 9;
}

/* ============================================================
   15. SIDEBAR
   ============================================================ */
.sidebar {
  background-color: var(--color-bg-sidebar);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  height: auto;
}

@media (min-width: 1024px) {
  .sidebar {
    position: sticky;
    top: calc(61px + var(--space-6));
    max-height: calc(100vh - 80px);
    overflow-y: auto;
  }
}

.sidebar__heading {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  color: var(--color-text-heading);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--color-primary);
  margin-bottom: var(--space-2);
}

/* Sidebar widget title (h3 from template) */
.sidebar h3 {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  color: var(--color-text-heading);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--color-primary);
  margin-bottom: var(--space-2);
}

/* Sidebar articles */
.sidebar__articles {
  display: flex;
  flex-direction: column;
  gap: 0;
  height: auto;
  overflow: visible;
}

.article--sidebar {
  flex-direction: row;
  border-radius: var(--radius-md);
  border: none;
  border-bottom: 1px solid var(--color-border);
  box-shadow: none;
  padding: var(--space-3) 0;
  gap: var(--space-3);
  align-items: flex-start;
  background: transparent;
}

.article--sidebar:last-child {
  border-bottom: none;
}

.article--sidebar:hover {
  transform: none;
  box-shadow: none;
  background-color: transparent;
}

.article--sidebar .article__image {
  flex-shrink: 0;
  width: 72px;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.article--sidebar .article__image img {
  width: 72px;
  height: 54px;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.article--sidebar .article__title {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-snug);
}

.article--sidebar .article__title a:hover {
  color: var(--color-primary);
}

/* Sidebar nav */
.sidebar .nav ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.sidebar .nav ul li a {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-body);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.sidebar .nav ul li a:hover {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

/* Sidebar tags */
.sidebar .tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.sidebar .tags li a {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: var(--color-text-body);
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.sidebar .tags li a:hover {
  background-color: var(--color-violet);
  color: var(--color-text-inverse);
  border-color: var(--color-violet);
}

/* Sidebar authors */
.sidebar .authors {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.sidebar .authors li a {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-body);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.sidebar .authors li a:hover {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

/* Sidebar promo */
.sidebar .promo {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.sidebar .promo li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-body);
}

/* ============================================================
   16. POST PAGE (article reading)
   ============================================================ */
.text {
  max-width: 100%;
}

/* Hero area */
.text__hero {
  margin-bottom: var(--space-8);
}

.text__cover {
  margin: 0 0 var(--space-6);
  border-radius: var(--radius-lg);
  overflow: hidden;
  line-height: 0;
}

.text__cover img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
}

.text__hero-meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.text__title {
  font-family: var(--font-ui);
  font-size: clamp(var(--text-2xl), 4vw, var(--text-4xl));
  font-weight: var(--weight-bold);
  color: var(--color-text-heading);
  line-height: var(--leading-tight);
  letter-spacing: -0.03em;
  margin: 0;
}

/* Category pill in post page */
.text__category {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: 0;
}

.text__category a {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  color: var(--color-primary);
  background-color: var(--color-primary-light);
  border-radius: var(--radius-pill);
  letter-spacing: 0.03em;
  text-transform: uppercase;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.text__category a:hover {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

/* Byline */
.text__byline {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.text__byline-sep {
  color: var(--color-border-strong);
}

.text__author-inline a {
  color: var(--color-primary);
  font-weight: var(--weight-medium);
  transition: color var(--transition-fast);
}

.text__author-inline a:hover {
  color: var(--color-primary-dark);
}

/* Body text */
.text__body {
  max-width: var(--content-max);
  font-family: var(--font-reading);
  font-size: 1.125rem;
  line-height: var(--leading-reading);
  color: var(--color-text-body);
}

.text__body p {
  margin-bottom: var(--space-5);
}

.text__body h2 {
  font-family: var(--font-ui);
  font-size: var(--text-2xl);
  font-weight: var(--weight-bold);
  color: var(--color-text-heading);
  letter-spacing: -0.02em;
  line-height: var(--leading-snug);
  margin: var(--space-10) 0 var(--space-4);
  padding-left: var(--space-4);
  border-left: 4px solid var(--color-primary);
}

.text__body h3 {
  font-family: var(--font-ui);
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: var(--color-text-heading);
  letter-spacing: -0.02em;
  margin: var(--space-8) 0 var(--space-3);
}

.text__body h4 {
  font-family: var(--font-ui);
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  color: var(--color-text-heading);
  margin: var(--space-6) 0 var(--space-2);
}

.text__body strong, .text__body b {
  font-weight: var(--weight-bold);
  color: var(--color-text-heading);
}

.text__body em, .text__body i {
  font-style: italic;
}

.text__body a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition-fast);
}

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

.text__body ul, .text__body ol {
  margin-bottom: var(--space-5);
  padding-left: var(--space-6);
}

.text__body ul {
  list-style: disc;
}

.text__body ol {
  list-style: decimal;
}

.text__body li {
  margin-bottom: var(--space-2);
  line-height: var(--leading-relaxed);
}

/* Blockquote */
.text__body blockquote {
  margin: var(--space-8) 0;
  padding: var(--space-5) var(--space-6);
  border-left: 4px solid var(--color-primary);
  background-color: var(--color-primary-light);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.text__body blockquote p {
  font-size: var(--text-lg);
  font-style: italic;
  color: var(--color-text-heading);
  margin-bottom: var(--space-2);
}

.text__body blockquote cite {
  font-size: var(--text-sm);
  font-style: normal;
  color: var(--color-text-muted);
  font-family: var(--font-ui);
}

/* Figures & images in body */
.text__body figure {
  margin: var(--space-8) 0;
}

.text__body figure img {
  width: 100%;
  border-radius: var(--radius-md);
  display: block;
}

.text__body figcaption {
  margin-top: var(--space-3);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-align: center;
  font-style: italic;
}

.text__body img {
  max-width: 100%;
  border-radius: var(--radius-md);
  margin: var(--space-6) 0;
}

/* Data tables */
.text__body table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  margin: var(--space-8) 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.text__body table thead {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

.text__body table thead th {
  padding: var(--space-3) var(--space-4);
  font-weight: var(--weight-semibold);
  text-align: left;
  letter-spacing: 0.03em;
  white-space: nowrap;
}

.text__body table thead th:last-child,
.text__body table tbody td:last-child {
  text-align: right;
}

.text__body table tbody tr {
  border-bottom: 1px solid var(--color-border);
  transition: background-color var(--transition-fast);
}

.text__body table tbody tr:nth-child(even) {
  background-color: var(--color-bg-section);
}

.text__body table tbody tr:hover {
  background-color: var(--color-primary-light);
}

.text__body table tbody td {
  padding: var(--space-3) var(--space-4);
  color: var(--color-text-body);
  vertical-align: top;
}

/* Responsive table wrapper */
.text__body .table-wrap,
.text__body table {
  display: block;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.text__body table {
  min-width: 480px;
}

/* Table of contents */
.table-of-content {
  background-color: var(--color-bg-section);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5) var(--space-6);
  margin-bottom: var(--space-8);
  box-shadow: var(--shadow-toc);
}

.table-of-content > span {
  display: block;
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  color: var(--color-text-heading);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--color-primary);
}

.table-of-content ol,
.table-of-content ul {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: toc-counter;
}

.table-of-content li {
  counter-increment: toc-counter;
  margin-bottom: var(--space-2);
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
}

.table-of-content li::before {
  content: counter(toc-counter) ".";
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  color: var(--color-primary);
  flex-shrink: 0;
  min-width: 1.5em;
}

.table-of-content a {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  color: var(--color-text-body);
  text-decoration: none;
  transition: color var(--transition-fast);
  line-height: var(--leading-snug);
}

.table-of-content a:hover {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* Post info block */
.text__info {
  max-width: var(--content-max);
  margin-top: var(--space-10);
  padding: var(--space-5) var(--space-6);
  background-color: var(--color-bg-section);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.text__info p {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin: 0;
}

.text__info a {
  color: var(--color-primary);
  transition: color var(--transition-fast);
}

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

.text__date {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin: 0;
}

.text__author {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin: 0;
}

.text__author a {
  color: var(--color-primary);
}

.text__tags {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin: 0;
}

.text__tags a {
  color: var(--color-primary);
}

/* Author image in author page */
img.author {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  float: left;
  margin: 0 var(--space-6) var(--space-4) 0;
  border: 3px solid var(--color-border);
}

/* ============================================================
   17. SEARCH FORM
   ============================================================ */
.search-form {
  margin-bottom: var(--space-8);
}

.search-form form {
  display: flex;
  gap: var(--space-3);
  max-width: 560px;
}

.search-form input[type="text"] {
  flex: 1;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-ui);
  font-size: var(--text-base);
  color: var(--color-text-heading);
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.search-form input[type="text"]:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.search-form input[type="submit"] {
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-text-inverse);
  background-color: var(--color-primary);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-fast);
  white-space: nowrap;
}

.search-form input[type="submit"]:hover {
  background-color: var(--color-primary-dark);
}

/* ============================================================
   18. PAGINATION
   ============================================================ */
.pagination {
  margin-top: var(--space-10);
  display: flex;
  justify-content: center;
}

.pagination ul {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  justify-content: center;
}

.pagination ul li {
  display: flex;
}

.pagination ul li a {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 var(--space-3);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-body);
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
  white-space: nowrap;
}

.pagination ul li a:hover {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  border-color: var(--color-primary);
}

.pagination__active {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 var(--space-3);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  color: var(--color-text-inverse);
  background-color: var(--color-primary);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-sm);
}

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

/* ============================================================
   19. PREFOOTER / SIDEBAR BOTTOM
   ============================================================ */
.prefooter {
  background-color: var(--color-bg-section);
  border-top: 1px solid var(--color-border);
  padding: var(--space-12) 0;
}

.prefooter__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

.prefooter__inner.sidebar {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  background: transparent;
  border: none;
  position: static;
  max-height: none;
  overflow: visible;
}

@media (min-width: 600px) {
  .prefooter__inner.sidebar {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .prefooter__inner.sidebar {
    grid-template-columns: repeat(4, 1fr);
  }
}

.prefooter .sidebar__heading,
.prefooter h3 {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  color: var(--color-text-heading);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--color-primary);
  margin-bottom: var(--space-4);
}

.prefooter .nav ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.prefooter .nav ul li a {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) 0;
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  color: var(--color-text-body);
  transition: color var(--transition-fast);
}

.prefooter .nav ul li a:hover {
  color: var(--color-primary);
}

.prefooter .nav ul li a svg {
  stroke: var(--color-primary);
  flex-shrink: 0;
  width: 14px;
  height: 14px;
}

.prefooter .tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.prefooter .tags li a {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  color: var(--color-text-body);
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.prefooter .tags li a:hover {
  background-color: var(--color-violet);
  color: var(--color-text-inverse);
  border-color: var(--color-violet);
}

.prefooter .tags li a svg {
  stroke: var(--color-violet);
  width: 12px;
  height: 12px;
}

.prefooter .authors li a {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) 0;
  font-size: var(--text-sm);
  color: var(--color-text-body);
  transition: color var(--transition-fast);
}

.prefooter .authors li a:hover {
  color: var(--color-primary);
}

.prefooter .authors li a svg {
  stroke: var(--color-text-muted);
  flex-shrink: 0;
}

.prefooter .promo li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  padding: var(--space-2) 0;
  font-size: var(--text-sm);
  color: var(--color-text-body);
  border-bottom: 1px solid var(--color-border);
}

.prefooter .promo li:last-child {
  border-bottom: none;
}

.prefooter .promo li svg {
  stroke: var(--color-primary);
  flex-shrink: 0;
  margin-top: 2px;
}

.prefooter .article {
  flex-direction: row;
  border: none;
  box-shadow: none;
  background: transparent;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
  border-radius: 0;
  gap: var(--space-3);
}

.prefooter .article:last-child {
  border-bottom: none;
}

.prefooter .article:hover {
  transform: none;
  box-shadow: none;
}

.prefooter .article .article__image {
  flex-shrink: 0;
  width: 64px;
}

.prefooter .article .article__image img {
  width: 64px;
  height: 48px;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.prefooter .article .article__title {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
}

/* ============================================================
   20. FOOTER
   ============================================================ */
.footer {
  background-color: var(--color-bg-footer);
  color: rgba(255,255,255,0.75);
  padding: var(--space-10) 0;
}

.footer__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-items: flex-start;
}

@media (min-width: 640px) {
  .footer__inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer__logo-text {
  font-family: var(--font-ui);
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  letter-spacing: -0.04em;
  line-height: 1;
}

.footer__logo-veda {
  color: var(--color-text-inverse);
}

.footer__logo-cz {
  background: var(--gradient-logo);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer__tagline {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.5);
  margin: 0;
}

.footer__meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  text-align: right;
}

.footer__meta p {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.5);
  margin: 0;
}

/* ============================================================
   21. LOGO WORDMARK (text fallback in header)
   ============================================================ */
.header__logo a:not(:has(img)) {
  font-family: var(--font-ui);
  font-weight: var(--weight-bold);
  font-size: clamp(1.2rem, 2.5vw, 1.6rem);
  letter-spacing: -0.04em;
  color: var(--color-text-heading);
}

/* We simulate the VĚDA / .cz split via a CSS trick on the link text.
   Since we can't split the Twig variable text, we style the whole logo link
   and rely on the footer's explicit markup for the colored version. */

/* ============================================================
   22. POPUP
   ============================================================ */
.popup {
  display: none;
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: 1000;
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  max-width: 360px;
  box-shadow: 0 8px 32px rgba(15,23,42,0.16);
}

.popup #close {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  background: var(--color-bg-section);
  border-radius: 50%;
  border: none;
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.popup #close:hover {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

/* ============================================================
   23. TAGS (global)
   ============================================================ */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.tags li a {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  color: var(--color-text-body);
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.tags li a:hover {
  background-color: var(--color-violet);
  color: var(--color-text-inverse);
  border-color: var(--color-violet);
}

/* ============================================================
   24. PROMO (global)
   ============================================================ */
.promo {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.promo li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-body);
}

/* ============================================================
   25. AUTHORS (global)
   ============================================================ */
.authors {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.authors li a {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-body);
  transition: color var(--transition-fast);
}

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

/* ============================================================
   26. SIMILAR WIDGET
   ============================================================ */
.similar h3 {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  color: var(--color-text-heading);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--color-cyan);
  margin-bottom: var(--space-4);
}

/* ============================================================
   27. RESPONSIVE — MOBILE FIRST OVERRIDES
   ============================================================ */

/* Mobile: show hamburger, hide nav */
@media (max-width: 767px) {
  .header__toggle {
    display: flex;
  }

  .header .nav {
    display: none;
  }

  .tray {
    display: none;
  }

  .top__inner {
    grid-template-columns: 1fr;
  }

  .top__inner .article:first-child {
    min-height: 300px;
  }

  .main__inner {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    max-height: none;
    overflow: visible;
  }

  .text__body {
    font-size: 1rem;
  }

  .text__body h2 {
    font-size: var(--text-xl);
  }

  img.author {
    float: none;
    margin: 0 auto var(--space-4);
  }
}

/* Tablet */
@media (min-width: 768px) and (max-width: 1023px) {
  .header__toggle {
    display: none;
  }

  .tray__inner ul {
    grid-template-columns: repeat(5, 1fr);
  }

  .top__inner {
    grid-template-columns: 1fr 1fr;
  }

  .top__inner .article:not(:first-child) {
    grid-column: 2;
  }

  .top__inner .article:first-child {
    grid-row: 1 / 3;
  }

  .main__inner {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    max-height: none;
    overflow: visible;
  }
}

/* Desktop */
@media (min-width: 1024px) {
  .header__toggle {
    display: none;
  }

  .tray__inner ul {
    grid-template-columns: repeat(8, 1fr);
  }

  .top__inner {
    grid-template-columns: 3fr 2fr;
    grid-template-rows: auto auto;
  }

  .top__inner .article:first-child {
    grid-column: 1;
    grid-row: 1 / 3;
    min-height: 520px;
  }

  .top__inner .article:nth-child(2),
  .top__inner .article:nth-child(3),
  .top__inner .article:nth-child(4),
  .top__inner .article:nth-child(5) {
    grid-column: 2;
  }
}

/* Large desktop */
@media (min-width: 1280px) {
  .tray__inner ul {
    grid-template-columns: repeat(15, 1fr);
  }
}

/* ============================================================
   28. UTILITY
   ============================================================ */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border-width: 0;
}

/* iframe responsive */
iframe {
  max-width: 100%;
  border-radius: var(--radius-md);
}

/* Sklik / ad wrappers */
[id^="sklik_"] {
  display: block;
  overflow: hidden;
}