/* ============================================================
   Print-Kazan.ru — style.css
   Color scheme: Deep Blue #1A365D | Warm White #FAF9F6 | Orange #E07A00
   Fonts: Inter (body) + DM Sans (headings) via Google Fonts
   ============================================================ */

/* --- Design Tokens --- */
:root {
  /* Colors */
  --color-primary:      #1A365D;
  --color-primary-dark: #122540;
  --color-primary-mid:  #254d82;
  --color-accent:       #E07A00;
  --color-accent-hover: #c46c00;
  --color-bg:           #FAF9F6;
  --color-bg-card:      #FFFFFF;
  --color-surface:      #F0EEE9;
  --color-text:         #1C1C1E;
  --color-text-muted:   #5A5A6A;
  --color-border:       #DDD9D0;
  --color-footer-bg:    #1A365D;
  --color-footer-text:  #CBD5E1;

  /* Typography */
  --font-body:     'Inter', system-ui, sans-serif;
  --font-heading:  'DM Sans', system-ui, sans-serif;

  /* Spacing */
  --space-xs:  0.25rem;
  --space-sm:  0.5rem;
  --space-md:  1rem;
  --space-lg:  1.5rem;
  --space-xl:  2.5rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;

  /* Type scale */
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  2rem;
  --text-4xl:  2.75rem;
  --text-hero: 3.5rem;

  /* Radii & Shadows */
  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  16px;
  --shadow-sm:  0 1px 3px rgba(26,54,93,0.08);
  --shadow-md:  0 4px 16px rgba(26,54,93,0.12);
  --shadow-lg:  0 8px 32px rgba(26,54,93,0.16);

  /* Transitions */
  --transition: 0.22s ease;

  /* Layout */
  --max-width: 1180px;
  --nav-height: 64px;
}

/* --- Dark Theme --- */
[data-theme="dark"],
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-bg:        #0F1C2E;
    --color-bg-card:   #162235;
    --color-surface:   #1E2F46;
    --color-text:      #EAE8E2;
    --color-text-muted:#94A3B8;
    --color-border:    #2A3D58;
    --color-footer-bg: #0A1320;
    --color-footer-text:#94A3B8;
  }
}

[data-theme="dark"] {
  --color-bg:        #0F1C2E;
  --color-bg-card:   #162235;
  --color-surface:   #1E2F46;
  --color-text:      #EAE8E2;
  --color-text-muted:#94A3B8;
  --color-border:    #2A3D58;
  --color-footer-bg: #0A1320;
  --color-footer-text:#94A3B8;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: background-color var(--transition), color var(--transition);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-accent-hover); }

h1, h2, h3, h4, h5 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-text);
}

ul, ol { padding-left: 1.5rem; }
li { margin-bottom: 0.4rem; }

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

.section {
  padding: var(--space-3xl) 0;
}

.section--alt {
  background-color: var(--color-surface);
}

/* --- Navigation --- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  background-color: var(--color-primary);
  box-shadow: 0 2px 12px rgba(0,0,0,0.18);
  display: flex;
  align-items: center;
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  color: #FFFFFF;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.nav__logo svg {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  list-style: none;
  padding: 0;
}

.nav__links a {
  color: rgba(255,255,255,0.85);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: color var(--transition);
}

.nav__links a:hover,
.nav__links a.active {
  color: var(--color-accent);
}

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

/* Theme toggle */
.theme-toggle {
  background: none;
  border: 2px solid rgba(255,255,255,0.3);
  border-radius: 20px;
  cursor: pointer;
  color: #FFFFFF;
  width: 44px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  transition: border-color var(--transition), background-color var(--transition);
  position: relative;
}

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

.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
  position: absolute;
  width: 16px;
  height: 16px;
  transition: opacity var(--transition), transform var(--transition);
}

.theme-toggle .icon-moon { opacity: 1; transform: scale(1); }
.theme-toggle .icon-sun  { opacity: 0; transform: scale(0.7); }

[data-theme="dark"] .theme-toggle .icon-moon { opacity: 0; transform: scale(0.7); }
[data-theme="dark"] .theme-toggle .icon-sun  { opacity: 1; transform: scale(1); }

/* Hamburger */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: #FFFFFF;
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav__hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__hamburger.open span:nth-child(2) { opacity: 0; }
.nav__hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* --- Hero --- */
.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-mid) 60%, #1e4d8c 100%);
  color: #FFFFFF;
  padding: var(--space-3xl) 0 calc(var(--space-3xl) * 1.3);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E") repeat;
  pointer-events: none;
}

.hero__inner {
  position: relative;
  z-index: 1;
  max-width: 760px;
}

.hero__tag {
  display: inline-block;
  background-color: var(--color-accent);
  color: #FFFFFF;
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 4px 14px;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-lg);
}

.hero h1 {
  font-size: clamp(var(--text-3xl), 5vw, var(--text-hero));
  font-family: var(--font-heading);
  color: #FFFFFF;
  margin-bottom: var(--space-lg);
  line-height: 1.15;
}

.hero__desc {
  font-size: var(--text-lg);
  color: rgba(255,255,255,0.82);
  max-width: 560px;
  margin-bottom: var(--space-xl);
  line-height: 1.65;
}

.hero__actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: var(--text-base);
  padding: 12px 28px;
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: background-color var(--transition), color var(--transition), transform 0.15s ease, box-shadow var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
}

.btn:hover { transform: translateY(-1px); }

.btn--primary {
  background-color: var(--color-accent);
  color: #FFFFFF;
  border-color: var(--color-accent);
}
.btn--primary:hover {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: #FFFFFF;
  box-shadow: 0 4px 16px rgba(224,122,0,0.35);
}

.btn--ghost {
  background-color: transparent;
  color: #FFFFFF;
  border-color: rgba(255,255,255,0.5);
}
.btn--ghost:hover {
  border-color: #FFFFFF;
  background-color: rgba(255,255,255,0.08);
  color: #FFFFFF;
}

/* --- Cards Grid --- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
  border-color: var(--color-accent);
}

.card__icon {
  width: 52px;
  height: 52px;
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-lg);
  color: var(--color-accent);
}

.card__icon svg {
  width: 28px;
  height: 28px;
}

.card h3 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-sm);
  color: var(--color-primary);
}

[data-theme="dark"] .card h3 {
  color: var(--color-text);
}

.card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
}

.card__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: var(--space-lg);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: none;
  transition: gap var(--transition);
}

.card__link:hover {
  gap: 10px;
  color: var(--color-accent-hover);
}

/* --- Section Headings --- */
.section-head {
  max-width: 620px;
  margin-bottom: var(--space-xl);
}

.section-head__label {
  display: inline-block;
  color: var(--color-accent);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
}

.section-head h2 {
  font-size: clamp(var(--text-2xl), 3.5vw, var(--text-4xl));
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

[data-theme="dark"] .section-head h2 {
  color: var(--color-text);
}

.section-head p {
  color: var(--color-text-muted);
  font-size: var(--text-lg);
  line-height: 1.65;
}

/* --- Stats Strip --- */
.stats-strip {
  background-color: var(--color-primary);
  color: #FFFFFF;
  padding: var(--space-xl) 0;
}

.stats-strip__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
  text-align: center;
}

.stat__number {
  font-family: var(--font-heading);
  font-size: var(--text-4xl);
  font-weight: 700;
  color: var(--color-accent);
  display: block;
}

.stat__label {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.7);
  margin-top: 4px;
}

/* --- Article Layout --- */
.article-wrap {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--space-2xl);
  align-items: start;
}

.article-body h2 {
  font-size: var(--text-3xl);
  color: var(--color-primary);
  margin: var(--space-2xl) 0 var(--space-md);
}

[data-theme="dark"] .article-body h2 {
  color: var(--color-text);
}

.article-body h2:first-child {
  margin-top: 0;
}

.article-body h3 {
  font-size: var(--text-xl);
  color: var(--color-primary);
  margin: var(--space-xl) 0 var(--space-sm);
}

[data-theme="dark"] .article-body h3 {
  color: var(--color-text);
}

.article-body p {
  margin-bottom: var(--space-md);
  color: var(--color-text);
  line-height: 1.8;
}

.article-body ul,
.article-body ol {
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

.article-body li {
  line-height: 1.75;
}

.article-body strong {
  color: var(--color-primary);
  font-weight: 600;
}

[data-theme="dark"] .article-body strong {
  color: var(--color-text);
}

/* Highlight box */
.highlight-box {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-mid) 100%);
  color: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  margin: var(--space-xl) 0;
}

.highlight-box h3 {
  color: var(--color-accent);
  font-size: var(--text-xl);
  margin-bottom: var(--space-sm);
}

.highlight-box p,
.highlight-box a {
  color: rgba(255,255,255,0.9);
}

.highlight-box a {
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.highlight-box a:hover {
  color: var(--color-accent);
}

/* Sidebar */
.article-sidebar {
  position: sticky;
  top: calc(var(--nav-height) + var(--space-lg));
}

.sidebar-card {
  background-color: 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-card h4 {
  font-size: var(--text-base);
  color: var(--color-primary);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-accent);
}

[data-theme="dark"] .sidebar-card h4 {
  color: var(--color-text);
}

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

.sidebar-nav li {
  margin-bottom: 0;
}

.sidebar-nav a {
  display: block;
  padding: 6px 0;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  border-bottom: 1px solid var(--color-border);
  transition: color var(--transition), padding-left var(--transition);
}

.sidebar-nav a:hover {
  color: var(--color-accent);
  padding-left: 6px;
}

.sidebar-nav li:last-child a {
  border-bottom: none;
}

/* --- Breadcrumbs --- */
.breadcrumbs {
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-xl);
}

.breadcrumbs__list {
  list-style: none;
  padding: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.breadcrumbs__list li {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.breadcrumbs__list li:not(:last-child)::after {
  content: '›';
  color: var(--color-border);
}

.breadcrumbs__list a {
  color: var(--color-accent);
}

/* --- Article Hero --- */
.article-hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-mid) 100%);
  color: #FFFFFF;
  padding: var(--space-2xl) 0;
  border-bottom: 4px solid var(--color-accent);
}

.article-hero__tag {
  display: inline-block;
  background-color: var(--color-accent);
  color: #FFFFFF;
  font-size: var(--text-sm);
  font-weight: 600;
  padding: 4px 14px;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-md);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.article-hero h1 {
  font-size: clamp(var(--text-2xl), 4vw, var(--text-4xl));
  color: #FFFFFF;
  margin-bottom: var(--space-md);
  max-width: 800px;
}

.article-hero__meta {
  color: rgba(255,255,255,0.7);
  font-size: var(--text-sm);
  display: flex;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

/* --- Feature list --- */
.feature-list {
  list-style: none;
  padding: 0;
}

.feature-list li {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border);
  align-items: flex-start;
}

.feature-list li:last-child {
  border-bottom: none;
}

.feature-list__icon {
  width: 32px;
  height: 32px;
  background-color: var(--color-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: #FFFFFF;
  font-size: 14px;
  font-weight: 700;
}

.feature-list__content strong {
  display: block;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--color-primary);
}

[data-theme="dark"] .feature-list__content strong {
  color: var(--color-text);
}

/* --- Data table --- */
.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-lg) 0;
  font-size: var(--text-sm);
}

.data-table th {
  background-color: var(--color-primary);
  color: #FFFFFF;
  padding: 12px 16px;
  text-align: left;
  font-family: var(--font-heading);
}

.data-table td {
  padding: 11px 16px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
}

.data-table tr:nth-child(even) td {
  background-color: var(--color-surface);
}

/* --- CTA Banner --- */
.cta-banner {
  background: linear-gradient(135deg, var(--color-primary) 0%, #1e4d8c 100%);
  color: #FFFFFF;
  padding: var(--space-3xl) 0;
  text-align: center;
}

.cta-banner h2 {
  font-size: clamp(var(--text-2xl), 4vw, var(--text-4xl));
  color: #FFFFFF;
  margin-bottom: var(--space-md);
}

.cta-banner p {
  color: rgba(255,255,255,0.8);
  font-size: var(--text-lg);
  margin-bottom: var(--space-xl);
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

/* --- Footer --- */
.footer {
  background-color: var(--color-footer-bg);
  color: var(--color-footer-text);
  padding: var(--space-3xl) 0 var(--space-xl);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: #FFFFFF;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 700;
  text-decoration: none;
  margin-bottom: var(--space-md);
}

.footer__brand svg {
  width: 32px;
  height: 32px;
}

.footer__desc {
  font-size: var(--text-sm);
  line-height: 1.65;
  max-width: 280px;
  margin-bottom: var(--space-lg);
}

.footer__col h4 {
  color: #FFFFFF;
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: var(--space-md);
}

.footer__links {
  list-style: none;
  padding: 0;
}

.footer__links li {
  margin-bottom: 10px;
}

.footer__links a {
  color: var(--color-footer-text);
  font-size: var(--text-sm);
  text-decoration: none;
  transition: color var(--transition);
}

.footer__links a:hover {
  color: var(--color-accent);
}

.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-md);
}

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

.footer__badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.5);
}

.footer__accent-line {
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent) 0%, #f59e0b 100%);
  border-radius: 2px;
  margin-bottom: var(--space-3xl);
}

/* --- Intro text strip --- */
.intro-strip {
  background-color: var(--color-surface);
  border-left: 4px solid var(--color-accent);
  padding: var(--space-lg) var(--space-xl);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: var(--space-xl) 0;
}

.intro-strip p {
  color: var(--color-text);
  font-size: var(--text-lg);
  line-height: 1.7;
  margin: 0;
}

/* --- Technology grid --- */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.tech-item {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  border-top: 3px solid var(--color-accent);
}

.tech-item h4 {
  font-size: var(--text-base);
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

[data-theme="dark"] .tech-item h4 {
  color: var(--color-text);
}

.tech-item p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin: 0;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .article-wrap {
    grid-template-columns: 1fr;
  }
  .article-sidebar {
    position: static;
  }
  .stats-strip__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer__grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --space-3xl: 3.5rem;
  }

  .nav__links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background-color: var(--color-primary-dark);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-sm) 0;
    box-shadow: var(--shadow-lg);
  }

  .nav__links.open {
    display: flex;
  }

  .nav__links a {
    padding: 14px 24px;
    border-bottom: 1px solid rgba(255,255,255,0.07);
  }

  .nav__hamburger {
    display: flex;
  }

  .hero h1 { font-size: var(--text-3xl); }
  .hero__actions { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }

  .stats-strip__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
  }

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

  .footer__bottom {
    flex-direction: column;
    text-align: center;
  }

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

  .data-table { font-size: 0.8rem; }
  .data-table th, .data-table td { padding: 9px 10px; }
}

@media (max-width: 480px) {
  :root { --space-lg: 1.25rem; }
  .stats-strip__grid { grid-template-columns: 1fr 1fr; }
  .section-head h2 { font-size: var(--text-2xl); }
}

/* --- Utility --- */
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mb-md { margin-bottom: var(--space-md); }

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

/* Skip link */
.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  z-index: 999;
  background: var(--color-accent);
  color: #FFFFFF;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  text-decoration: none;
}
.skip-link:focus { top: 16px; }