critical-page.css - developers.rxharun.com

I’ll build this as a production-style critical page CSS file for RX Theme: fast above-the-fold layout, medical-site UI, accessibility, responsive rules, and safe WordPress defaults.

Dear friend, for this file:

assets/static/static-css/critical/critical-page.css

use it for above-the-fold page rendering: header, logo, navigation, hero, page title, breadcrumbs, first content block, layout skeleton, accessibility, responsive base, and WordPress core elements.

Critical CSS should normally be small, but below is an advanced full starter version for RX Theme.

/*!
Theme Name: RX Theme
File: assets/static/static-css/critical/critical-page.css
Purpose: Critical above-the-fold CSS for pages
Author: RxHarun
Version: 1.0.0
*/

/* =========================================================
   01. ROOT DESIGN TOKENS
   ========================================================= */

:root {
  --rx-font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, "Noto Sans", sans-serif;
  --rx-font-serif: Georgia, "Times New Roman", serif;
  --rx-font-mono: Consolas, Monaco, "Courier New", monospace;

  --rx-color-primary: #075985;
  --rx-color-primary-dark: #0c4a6e;
  --rx-color-primary-light: #e0f2fe;

  --rx-color-secondary: #0f766e;
  --rx-color-accent: #dc2626;

  --rx-color-text: #111827;
  --rx-color-text-soft: #374151;
  --rx-color-muted: #6b7280;
  --rx-color-border: #e5e7eb;

  --rx-color-bg: #ffffff;
  --rx-color-bg-soft: #f8fafc;
  --rx-color-bg-muted: #f1f5f9;

  --rx-color-success: #15803d;
  --rx-color-warning: #b45309;
  --rx-color-danger: #b91c1c;
  --rx-color-info: #0369a1;

  --rx-container-xs: 640px;
  --rx-container-sm: 768px;
  --rx-container-md: 1024px;
  --rx-container-lg: 1200px;
  --rx-container-xl: 1320px;

  --rx-space-1: 0.25rem;
  --rx-space-2: 0.5rem;
  --rx-space-3: 0.75rem;
  --rx-space-4: 1rem;
  --rx-space-5: 1.25rem;
  --rx-space-6: 1.5rem;
  --rx-space-8: 2rem;
  --rx-space-10: 2.5rem;
  --rx-space-12: 3rem;
  --rx-space-16: 4rem;

  --rx-radius-xs: 4px;
  --rx-radius-sm: 6px;
  --rx-radius-md: 10px;
  --rx-radius-lg: 14px;
  --rx-radius-xl: 20px;
  --rx-radius-full: 999px;

  --rx-shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.08);
  --rx-shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
  --rx-shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.12);

  --rx-header-height: 72px;
  --rx-admin-bar-offset: 0px;

  --rx-transition-fast: 150ms ease;
  --rx-transition-base: 220ms ease;

  --rx-z-header: 1000;
  --rx-z-dropdown: 1010;
  --rx-z-overlay: 1020;
  --rx-z-skip: 9999;
}

.admin-bar {
  --rx-admin-bar-offset: 32px;
}

@media (max-width: 782px) {
  .admin-bar {
    --rx-admin-bar-offset: 46px;
  }
}

/* =========================================================
   02. MODERN RESET
   ========================================================= */

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

html {
  min-height: 100%;
  font-size: 16px;
  line-height: 1.5;
  text-size-adjust: 100%;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  min-height: 100%;
  margin: 0;
  font-family: var(--rx-font-sans);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--rx-color-text);
  background: var(--rx-color-bg);
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

img {
  border-style: none;
}

iframe,
embed,
object {
  max-width: 100%;
}

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

button {
  cursor: pointer;
}

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

a {
  color: var(--rx-color-primary);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

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

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
summary:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid rgba(14, 165, 233, 0.45);
  outline-offset: 3px;
}

p,
h1,
h2,
h3,
h4,
h5,
h6,
ul,
ol,
figure,
blockquote {
  margin-top: 0;
}

p:last-child,
ul:last-child,
ol:last-child,
figure:last-child,
blockquote:last-child {
  margin-bottom: 0;
}

/* =========================================================
   03. ACCESSIBILITY
   ========================================================= */

.screen-reader-text,
.sr-only {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.screen-reader-text:focus,
.sr-only:focus {
  position: fixed !important;
  top: calc(var(--rx-admin-bar-offset) + 12px);
  left: 12px;
  z-index: var(--rx-z-skip);
  width: auto;
  height: auto;
  padding: 0.75rem 1rem;
  margin: 0;
  color: #ffffff;
  background: var(--rx-color-primary-dark);
  border-radius: var(--rx-radius-sm);
  clip-path: none;
  white-space: normal;
  box-shadow: var(--rx-shadow-lg);
}

.skip-link {
  position: fixed;
  top: calc(var(--rx-admin-bar-offset) + 12px);
  left: 12px;
  z-index: var(--rx-z-skip);
  transform: translateY(-160%);
  padding: 0.75rem 1rem;
  color: #ffffff;
  background: var(--rx-color-primary-dark);
  border-radius: var(--rx-radius-sm);
  text-decoration: none;
  box-shadow: var(--rx-shadow-lg);
  transition: transform var(--rx-transition-fast);
}

.skip-link:focus {
  transform: translateY(0);
}

[hidden] {
  display: none !important;
}

/* =========================================================
   04. LAYOUT CONTAINER
   ========================================================= */

.rx-site {
  min-height: 100vh;
  background: var(--rx-color-bg);
}

.rx-container,
.container,
.site-container,
.wrap {
  width: min(100% - 32px, var(--rx-container-xl));
  margin-inline: auto;
}

.rx-container-narrow {
  width: min(100% - 32px, 860px);
  margin-inline: auto;
}

.rx-container-wide {
  width: min(100% - 32px, 1480px);
  margin-inline: auto;
}

.rx-main,
.site-main,
#main {
  display: block;
}

.rx-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--rx-space-8);
}

@media (min-width: 1024px) {
  .rx-layout.has-sidebar {
    grid-template-columns: minmax(0, 1fr) 340px;
    align-items: start;
  }

  .rx-layout.sidebar-left {
    grid-template-columns: 340px minmax(0, 1fr);
  }

  .rx-layout.sidebar-left .rx-content {
    order: 2;
  }

  .rx-layout.sidebar-left .rx-sidebar {
    order: 1;
  }
}

/* =========================================================
   05. SITE HEADER
   ========================================================= */

.rx-site-header,
.site-header {
  position: sticky;
  top: var(--rx-admin-bar-offset);
  z-index: var(--rx-z-header);
  min-height: var(--rx-header-height);
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--rx-color-border);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.rx-header-inner,
.site-header .header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--rx-space-4);
  min-height: var(--rx-header-height);
}

.rx-site-branding,
.site-branding {
  display: flex;
  align-items: center;
  min-width: 0;
  gap: var(--rx-space-3);
}

.rx-logo,
.custom-logo-link {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  text-decoration: none;
}

.rx-logo img,
.custom-logo {
  width: auto;
  max-height: 48px;
}

.rx-site-title,
.site-title {
  margin: 0;
  font-size: clamp(1.2rem, 2vw, 1.55rem);
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.rx-site-title a,
.site-title a {
  color: var(--rx-color-text);
  text-decoration: none;
}

.rx-site-title a:hover,
.site-title a:hover {
  color: var(--rx-color-primary);
}

.rx-site-description,
.site-description {
  margin: 0.15rem 0 0;
  font-size: 0.82rem;
  line-height: 1.35;
  color: var(--rx-color-muted);
}

/* =========================================================
   06. NAVIGATION
   ========================================================= */

.rx-primary-nav,
.main-navigation {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  min-width: 0;
}

.rx-primary-menu,
.main-navigation ul,
.menu {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.rx-primary-menu li,
.main-navigation li,
.menu li {
  position: relative;
}

.rx-primary-menu a,
.main-navigation a,
.menu a {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0.45rem 0.75rem;
  color: var(--rx-color-text-soft);
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  border-radius: var(--rx-radius-md);
  transition:
    color var(--rx-transition-fast),
    background-color var(--rx-transition-fast);
}

.rx-primary-menu a:hover,
.rx-primary-menu .current-menu-item > a,
.rx-primary-menu .current-menu-ancestor > a,
.main-navigation a:hover,
.main-navigation .current-menu-item > a,
.main-navigation .current-menu-ancestor > a {
  color: var(--rx-color-primary-dark);
  background: var(--rx-color-primary-light);
}

.rx-primary-menu .sub-menu,
.main-navigation .sub-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  z-index: var(--rx-z-dropdown);
  display: block;
  width: 230px;
  padding: 0.5rem;
  margin: 0;
  list-style: none;
  background: #ffffff;
  border: 1px solid var(--rx-color-border);
  border-radius: var(--rx-radius-lg);
  box-shadow: var(--rx-shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition:
    opacity var(--rx-transition-fast),
    visibility var(--rx-transition-fast),
    transform var(--rx-transition-fast);
}

.rx-primary-menu li:hover > .sub-menu,
.rx-primary-menu li:focus-within > .sub-menu,
.main-navigation li:hover > .sub-menu,
.main-navigation li:focus-within > .sub-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.rx-primary-menu .sub-menu a,
.main-navigation .sub-menu a {
  display: flex;
  width: 100%;
  min-height: 38px;
  padding: 0.55rem 0.7rem;
  font-size: 0.9rem;
}

.rx-menu-toggle,
.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  color: var(--rx-color-text);
  background: var(--rx-color-bg-soft);
  border: 1px solid var(--rx-color-border);
  border-radius: var(--rx-radius-md);
}

.rx-menu-toggle span,
.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  box-shadow: 0 6px 0 currentColor, 0 -6px 0 currentColor;
}

/* =========================================================
   07. HEADER ACTIONS
   ========================================================= */

.rx-header-actions {
  display: flex;
  align-items: center;
  gap: var(--rx-space-2);
}

.rx-header-search-toggle,
.rx-theme-toggle,
.rx-header-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 42px;
  min-height: 42px;
  padding: 0.5rem 0.75rem;
  color: var(--rx-color-text-soft);
  background: var(--rx-color-bg-soft);
  border: 1px solid var(--rx-color-border);
  border-radius: var(--rx-radius-md);
  text-decoration: none;
  transition:
    color var(--rx-transition-fast),
    background-color var(--rx-transition-fast),
    border-color var(--rx-transition-fast);
}

.rx-header-search-toggle:hover,
.rx-theme-toggle:hover,
.rx-header-button:hover {
  color: var(--rx-color-primary-dark);
  background: var(--rx-color-primary-light);
  border-color: #bae6fd;
}

.rx-emergency-button,
.rx-cta-button {
  color: #ffffff;
  background: var(--rx-color-accent);
  border-color: var(--rx-color-accent);
}

.rx-emergency-button:hover,
.rx-cta-button:hover {
  color: #ffffff;
  background: #991b1b;
  border-color: #991b1b;
}

/* =========================================================
   08. MOBILE HEADER
   ========================================================= */

@media (max-width: 900px) {
  .rx-site-header,
  .site-header {
    position: sticky;
  }

  .rx-menu-toggle,
  .menu-toggle {
    display: inline-flex;
  }

  .rx-primary-nav,
  .main-navigation {
    position: fixed;
    inset: calc(var(--rx-admin-bar-offset) + var(--rx-header-height)) 0 auto 0;
    z-index: var(--rx-z-dropdown);
    display: none;
    max-height: calc(100vh - var(--rx-admin-bar-offset) - var(--rx-header-height));
    overflow: auto;
    padding: 1rem;
    background: #ffffff;
    border-bottom: 1px solid var(--rx-color-border);
    box-shadow: var(--rx-shadow-lg);
  }

  .rx-primary-nav.is-open,
  .main-navigation.toggled {
    display: block;
  }

  .rx-primary-menu,
  .main-navigation ul,
  .menu {
    display: block;
  }

  .rx-primary-menu a,
  .main-navigation a,
  .menu a {
    width: 100%;
    justify-content: space-between;
    min-height: 46px;
    padding: 0.75rem 0.85rem;
  }

  .rx-primary-menu .sub-menu,
  .main-navigation .sub-menu {
    position: static;
    width: auto;
    padding: 0.25rem 0 0.25rem 1rem;
    margin: 0;
    background: transparent;
    border: 0;
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .rx-header-actions {
    gap: 0.35rem;
  }

  .rx-header-button-text {
    display: none;
  }
}

/* =========================================================
   09. PAGE HERO / TITLE AREA
   ========================================================= */

.rx-page-hero,
.page-hero,
.rx-archive-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(2rem, 5vw, 4.5rem) 0;
  background:
    radial-gradient(circle at top left, rgba(14, 165, 233, 0.18), transparent 34%),
    linear-gradient(135deg, #f8fafc 0%, #eef7ff 45%, #ffffff 100%);
  border-bottom: 1px solid var(--rx-color-border);
}

.rx-page-hero::before,
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(14, 165, 233, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(14, 165, 233, 0.08) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.55), transparent);
}

.rx-page-hero-inner,
.page-hero-inner {
  position: relative;
  z-index: 1;
  max-width: 920px;
}

.rx-page-kicker,
.page-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 0.9rem;
  padding: 0.35rem 0.7rem;
  color: var(--rx-color-primary-dark);
  font-size: 0.82rem;
  font-weight: 800;
  line-height: 1.2;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: var(--rx-color-primary-light);
  border: 1px solid #bae6fd;
  border-radius: var(--rx-radius-full);
}

.rx-page-title,
.page-title,
.entry-title {
  margin: 0;
  color: var(--rx-color-text);
  font-size: clamp(2rem, 5vw, 4rem);
  line-height: 1.06;
  font-weight: 900;
  letter-spacing: -0.055em;
}

.rx-page-subtitle,
.page-subtitle,
.archive-description {
  max-width: 760px;
  margin-top: 1rem;
  color: var(--rx-color-text-soft);
  font-size: clamp(1rem, 2vw, 1.2rem);
  line-height: 1.75;
}

/* =========================================================
   10. BREADCRUMBS
   ========================================================= */

.rx-breadcrumbs,
.breadcrumbs,
.rank-math-breadcrumb,
.yoast-breadcrumb {
  margin-bottom: 1rem;
  color: var(--rx-color-muted);
  font-size: 0.88rem;
  line-height: 1.5;
}

.rx-breadcrumbs a,
.breadcrumbs a,
.rank-math-breadcrumb a,
.yoast-breadcrumb a {
  color: var(--rx-color-muted);
  text-decoration: none;
}

.rx-breadcrumbs a:hover,
.breadcrumbs a:hover,
.rank-math-breadcrumb a:hover,
.yoast-breadcrumb a:hover {
  color: var(--rx-color-primary);
  text-decoration: underline;
}

/* =========================================================
   11. MAIN PAGE CONTENT WRAPPER
   ========================================================= */

.rx-page-content-wrap,
.page-content-wrap {
  padding: clamp(2rem, 4vw, 4rem) 0;
}

.rx-content,
.site-content,
.content-area {
  min-width: 0;
}

.rx-card,
.rx-content-card,
.page-card {
  background: #ffffff;
  border: 1px solid var(--rx-color-border);
  border-radius: var(--rx-radius-xl);
  box-shadow: var(--rx-shadow-sm);
}

.rx-content-card,
.page-card {
  padding: clamp(1.25rem, 3vw, 2.25rem);
}

/* =========================================================
   12. ARTICLE / PAGE TYPOGRAPHY
   ========================================================= */

.rx-entry,
.entry-content,
.page-content {
  color: var(--rx-color-text);
  font-size: clamp(1rem, 1.2vw, 1.075rem);
  line-height: 1.8;
}

.rx-entry > * + *,
.entry-content > * + *,
.page-content > * + * {
  margin-top: 1.25em;
}

.rx-entry h1,
.rx-entry h2,
.rx-entry h3,
.rx-entry h4,
.rx-entry h5,
.rx-entry h6,
.entry-content h1,
.entry-content h2,
.entry-content h3,
.entry-content h4,
.entry-content h5,
.entry-content h6 {
  color: var(--rx-color-text);
  line-height: 1.22;
  font-weight: 850;
  letter-spacing: -0.035em;
}

.rx-entry h2,
.entry-content h2 {
  margin-top: 2em;
  font-size: clamp(1.6rem, 3vw, 2.35rem);
}

.rx-entry h3,
.entry-content h3 {
  margin-top: 1.8em;
  font-size: clamp(1.35rem, 2.4vw, 1.8rem);
}

.rx-entry h4,
.entry-content h4 {
  margin-top: 1.6em;
  font-size: 1.2rem;
}

.rx-entry p,
.entry-content p {
  margin-bottom: 1.15em;
}

.rx-entry strong,
.entry-content strong {
  font-weight: 800;
}

.rx-entry ul,
.rx-entry ol,
.entry-content ul,
.entry-content ol {
  padding-left: 1.4em;
}

.rx-entry li,
.entry-content li {
  margin-bottom: 0.55em;
}

.rx-entry blockquote,
.entry-content blockquote {
  margin: 1.75rem 0;
  padding: 1.25rem 1.5rem;
  color: var(--rx-color-text-soft);
  background: var(--rx-color-bg-soft);
  border-left: 5px solid var(--rx-color-primary);
  border-radius: 0 var(--rx-radius-lg) var(--rx-radius-lg) 0;
}

.rx-entry code,
.entry-content code {
  padding: 0.15em 0.35em;
  font-family: var(--rx-font-mono);
  font-size: 0.9em;
  background: var(--rx-color-bg-muted);
  border-radius: var(--rx-radius-xs);
}

.rx-entry pre,
.entry-content pre {
  overflow: auto;
  padding: 1rem;
  font-family: var(--rx-font-mono);
  font-size: 0.9rem;
  line-height: 1.6;
  background: #0f172a;
  color: #e5e7eb;
  border-radius: var(--rx-radius-lg);
}

.rx-entry pre code,
.entry-content pre code {
  padding: 0;
  color: inherit;
  background: transparent;
}

/* =========================================================
   13. MEDICAL CONTENT ELEMENTS
   ========================================================= */

.rx-medical-note,
.rx-health-note,
.rx-alert,
.rx-info-box,
.rx-warning-box,
.rx-danger-box,
.rx-success-box {
  padding: 1rem 1.1rem;
  border: 1px solid var(--rx-color-border);
  border-radius: var(--rx-radius-lg);
  background: var(--rx-color-bg-soft);
}

.rx-info-box {
  color: #075985;
  background: #f0f9ff;
  border-color: #bae6fd;
}

.rx-warning-box {
  color: #92400e;
  background: #fffbeb;
  border-color: #fde68a;
}

.rx-danger-box {
  color: #991b1b;
  background: #fef2f2;
  border-color: #fecaca;
}

.rx-success-box {
  color: #166534;
  background: #f0fdf4;
  border-color: #bbf7d0;
}

.rx-medical-disclaimer {
  padding: 1rem 1.1rem;
  color: var(--rx-color-text-soft);
  font-size: 0.95rem;
  line-height: 1.65;
  background: #fff7ed;
  border: 1px solid #fed7aa;
  border-radius: var(--rx-radius-lg);
}

.rx-medical-disclaimer strong {
  color: #9a3412;
}

.rx-evidence-chip,
.rx-reference-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  min-height: 28px;
  padding: 0.18rem 0.55rem;
  color: var(--rx-color-primary-dark);
  font-size: 0.8rem;
  font-weight: 800;
  line-height: 1;
  text-decoration: none;
  background: var(--rx-color-primary-light);
  border: 1px solid #bae6fd;
  border-radius: var(--rx-radius-full);
}

/* =========================================================
   14. META INFO
   ========================================================= */

.rx-entry-meta,
.entry-meta,
.posted-on,
.byline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem 0.75rem;
  color: var(--rx-color-muted);
  font-size: 0.9rem;
  line-height: 1.4;
}

.rx-entry-meta a,
.entry-meta a {
  color: inherit;
  text-decoration: none;
}

.rx-entry-meta a:hover,
.entry-meta a:hover {
  color: var(--rx-color-primary);
  text-decoration: underline;
}

.rx-author-mini {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
}

.rx-author-mini img,
.avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
}

/* =========================================================
   15. FEATURED IMAGE
   ========================================================= */

.rx-featured-image,
.post-thumbnail {
  overflow: hidden;
  margin-bottom: clamp(1.25rem, 3vw, 2rem);
  border-radius: var(--rx-radius-xl);
  background: var(--rx-color-bg-muted);
}

.rx-featured-image img,
.post-thumbnail img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

/* =========================================================
   16. BUTTONS
   ========================================================= */

.rx-btn,
.button,
.wp-block-button__link,
input[type="submit"],
button[type="submit"] {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-height: 44px;
  padding: 0.7rem 1rem;
  color: #ffffff;
  font-weight: 750;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  background: var(--rx-color-primary);
  border: 1px solid var(--rx-color-primary);
  border-radius: var(--rx-radius-md);
  box-shadow: var(--rx-shadow-sm);
  transition:
    transform var(--rx-transition-fast),
    background-color var(--rx-transition-fast),
    border-color var(--rx-transition-fast),
    box-shadow var(--rx-transition-fast);
}

.rx-btn:hover,
.button:hover,
.wp-block-button__link:hover,
input[type="submit"]:hover,
button[type="submit"]:hover {
  color: #ffffff;
  background: var(--rx-color-primary-dark);
  border-color: var(--rx-color-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--rx-shadow-md);
}

.rx-btn-secondary {
  color: var(--rx-color-primary-dark);
  background: var(--rx-color-primary-light);
  border-color: #bae6fd;
}

.rx-btn-secondary:hover {
  color: #ffffff;
  background: var(--rx-color-primary);
  border-color: var(--rx-color-primary);
}

.rx-btn-outline {
  color: var(--rx-color-primary-dark);
  background: transparent;
  border-color: var(--rx-color-primary);
}

.rx-btn-outline:hover {
  color: #ffffff;
  background: var(--rx-color-primary);
}

/* =========================================================
   17. FORMS
   ========================================================= */

input[type="text"],
input[type="search"],
input[type="email"],
input[type="url"],
input[type="tel"],
input[type="number"],
input[type="password"],
textarea,
select {
  width: 100%;
  min-height: 44px;
  padding: 0.65rem 0.8rem;
  color: var(--rx-color-text);
  background: #ffffff;
  border: 1px solid #cbd5e1;
  border-radius: var(--rx-radius-md);
  transition:
    border-color var(--rx-transition-fast),
    box-shadow var(--rx-transition-fast);
}

textarea {
  min-height: 130px;
  resize: vertical;
}

input::placeholder,
textarea::placeholder {
  color: #94a3b8;
}

input:focus,
textarea:focus,
select:focus {
  border-color: var(--rx-color-primary);
  box-shadow: 0 0 0 4px rgba(14, 165, 233, 0.14);
}

.search-form {
  display: flex;
  gap: 0.5rem;
}

.search-form label {
  flex: 1 1 auto;
}

.search-form .search-submit {
  flex: 0 0 auto;
}

/* =========================================================
   18. SIDEBAR CRITICAL STYLE
   ========================================================= */

.rx-sidebar,
.widget-area {
  min-width: 0;
}

.rx-sidebar .widget,
.widget {
  padding: 1.1rem;
  margin-bottom: 1rem;
  background: #ffffff;
  border: 1px solid var(--rx-color-border);
  border-radius: var(--rx-radius-lg);
  box-shadow: var(--rx-shadow-sm);
}

.widget-title,
.wp-block-heading {
  margin-bottom: 0.85rem;
  color: var(--rx-color-text);
  font-size: 1.05rem;
  line-height: 1.3;
  font-weight: 850;
}

.widget ul {
  padding-left: 0;
  margin: 0;
  list-style: none;
}

.widget li {
  padding: 0.45rem 0;
  border-bottom: 1px solid var(--rx-color-border);
}

.widget li:last-child {
  border-bottom: 0;
}

.widget a {
  color: var(--rx-color-text-soft);
  text-decoration: none;
}

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

/* =========================================================
   19. CARDS / POST LIST ABOVE FOLD
   ========================================================= */

.rx-grid {
  display: grid;
  gap: var(--rx-space-5);
}

.rx-grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.rx-grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.rx-post-card,
.rx-topic-card,
.rx-category-card {
  overflow: hidden;
  background: #ffffff;
  border: 1px solid var(--rx-color-border);
  border-radius: var(--rx-radius-xl);
  box-shadow: var(--rx-shadow-sm);
  transition:
    transform var(--rx-transition-fast),
    box-shadow var(--rx-transition-fast),
    border-color var(--rx-transition-fast);
}

.rx-post-card:hover,
.rx-topic-card:hover,
.rx-category-card:hover {
  transform: translateY(-2px);
  border-color: #bae6fd;
  box-shadow: var(--rx-shadow-md);
}

.rx-post-card-image {
  background: var(--rx-color-bg-muted);
}

.rx-post-card-image img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.rx-post-card-body,
.rx-topic-card-body,
.rx-category-card-body {
  padding: 1rem;
}

.rx-post-card-title,
.rx-topic-card-title,
.rx-category-card-title {
  margin: 0 0 0.55rem;
  font-size: 1.1rem;
  line-height: 1.35;
  font-weight: 850;
}

.rx-post-card-title a,
.rx-topic-card-title a,
.rx-category-card-title a {
  color: var(--rx-color-text);
  text-decoration: none;
}

.rx-post-card-title a:hover,
.rx-topic-card-title a:hover,
.rx-category-card-title a:hover {
  color: var(--rx-color-primary);
}

.rx-post-card-excerpt {
  color: var(--rx-color-text-soft);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* =========================================================
   20. TABLE OF CONTENTS CRITICAL
   ========================================================= */

.rx-toc,
.rx-table-of-contents {
  padding: 1rem 1.1rem;
  margin-bottom: 1.5rem;
  background: #ffffff;
  border: 1px solid var(--rx-color-border);
  border-radius: var(--rx-radius-lg);
  box-shadow: var(--rx-shadow-sm);
}

.rx-toc-title {
  margin: 0 0 0.75rem;
  color: var(--rx-color-text);
  font-size: 1rem;
  font-weight: 850;
}

.rx-toc ul {
  padding-left: 1.1rem;
  margin: 0;
}

.rx-toc li {
  margin-bottom: 0.35rem;
}

.rx-toc a {
  color: var(--rx-color-text-soft);
  text-decoration: none;
}

.rx-toc a:hover {
  color: var(--rx-color-primary);
  text-decoration: underline;
}

/* =========================================================
   21. WORDPRESS BLOCK BASICS
   ========================================================= */

.alignleft {
  float: left;
  margin: 0.4rem 1.25rem 1rem 0;
}

.alignright {
  float: right;
  margin: 0.4rem 0 1rem 1.25rem;
}

.aligncenter {
  display: block;
  margin-inline: auto;
}

.alignwide {
  width: min(100%, 1100px);
  margin-inline: auto;
}

.alignfull {
  width: 100vw;
  max-width: 100vw;
  margin-left: calc(50% - 50vw);
}

.wp-caption {
  max-width: 100%;
}

.wp-caption-text,
.gallery-caption,
figcaption {
  margin-top: 0.55rem;
  color: var(--rx-color-muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

.wp-block-image img {
  border-radius: var(--rx-radius-lg);
}

.wp-block-separator {
  border: 0;
  border-top: 1px solid var(--rx-color-border);
}

.wp-block-quote {
  border-left: 5px solid var(--rx-color-primary);
}

/* =========================================================
   22. PAGINATION CRITICAL
   ========================================================= */

.rx-pagination,
.pagination,
.nav-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin-top: 2rem;
}

.page-numbers,
.nav-links a,
.nav-links span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  min-height: 38px;
  padding: 0.45rem 0.7rem;
  color: var(--rx-color-text-soft);
  font-weight: 700;
  text-decoration: none;
  background: #ffffff;
  border: 1px solid var(--rx-color-border);
  border-radius: var(--rx-radius-md);
}

.page-numbers.current,
.nav-links .current,
.page-numbers:hover,
.nav-links a:hover {
  color: #ffffff;
  background: var(--rx-color-primary);
  border-color: var(--rx-color-primary);
}

/* =========================================================
   23. LOADING / SKELETON
   ========================================================= */

.rx-skeleton {
  position: relative;
  overflow: hidden;
  background: #e5e7eb;
  border-radius: var(--rx-radius-md);
}

.rx-skeleton::after {
  content: "";
  position: absolute;
  inset: 0;
  transform: translateX(-100%);
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.55),
    transparent
  );
  animation: rx-skeleton-loading 1.4s infinite;
}

@keyframes rx-skeleton-loading {
  100% {
    transform: translateX(100%);
  }
}

.rx-lcp-placeholder {
  min-height: 240px;
  background: var(--rx-color-bg-muted);
  border-radius: var(--rx-radius-xl);
}

/* =========================================================
   24. UTILITY CLASSES
   ========================================================= */

.rx-hidden {
  display: none !important;
}

.rx-visible {
  display: block !important;
}

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

.rx-text-left {
  text-align: left;
}

.rx-text-right {
  text-align: right;
}

.rx-mx-auto {
  margin-inline: auto;
}

.rx-mt-0 {
  margin-top: 0 !important;
}

.rx-mb-0 {
  margin-bottom: 0 !important;
}

.rx-bg-soft {
  background: var(--rx-color-bg-soft);
}

.rx-rounded {
  border-radius: var(--rx-radius-lg);
}

.rx-shadow {
  box-shadow: var(--rx-shadow-md);
}

.rx-overflow-hidden {
  overflow: hidden;
}

/* =========================================================
   25. DARK MODE READY
   ========================================================= */

[data-theme="dark"] {
  --rx-color-text: #f8fafc;
  --rx-color-text-soft: #cbd5e1;
  --rx-color-muted: #94a3b8;
  --rx-color-border: #1e293b;
  --rx-color-bg: #020617;
  --rx-color-bg-soft: #0f172a;
  --rx-color-bg-muted: #1e293b;
  --rx-color-primary-light: rgba(14, 165, 233, 0.18);
}

[data-theme="dark"] body,
body[data-theme="dark"] {
  color: var(--rx-color-text);
  background: var(--rx-color-bg);
}

[data-theme="dark"] .rx-site-header,
[data-theme="dark"] .site-header {
  background: rgba(2, 6, 23, 0.94);
}

[data-theme="dark"] .rx-primary-menu .sub-menu,
[data-theme="dark"] .main-navigation .sub-menu,
[data-theme="dark"] .rx-card,
[data-theme="dark"] .rx-content-card,
[data-theme="dark"] .page-card,
[data-theme="dark"] .rx-sidebar .widget,
[data-theme="dark"] .widget,
[data-theme="dark"] .rx-post-card,
[data-theme="dark"] .rx-topic-card,
[data-theme="dark"] .rx-category-card,
[data-theme="dark"] .rx-toc,
[data-theme="dark"] .rx-table-of-contents {
  background: #0f172a;
}

[data-theme="dark"] input,
[data-theme="dark"] textarea,
[data-theme="dark"] select {
  color: var(--rx-color-text);
  background: #020617;
  border-color: #334155;
}

[data-theme="dark"] .rx-page-hero,
[data-theme="dark"] .page-hero,
[data-theme="dark"] .rx-archive-hero {
  background:
    radial-gradient(circle at top left, rgba(14, 165, 233, 0.22), transparent 34%),
    linear-gradient(135deg, #020617 0%, #0f172a 55%, #020617 100%);
}

/* =========================================================
   26. RESPONSIVE SYSTEM
   ========================================================= */

@media (max-width: 1200px) {
  .rx-container,
  .container,
  .site-container,
  .wrap {
    width: min(100% - 28px, var(--rx-container-lg));
  }
}

@media (max-width: 1024px) {
  .rx-grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .rx-layout.has-sidebar,
  .rx-layout.sidebar-left {
    grid-template-columns: minmax(0, 1fr);
  }

  .rx-layout.sidebar-left .rx-content,
  .rx-layout.sidebar-left .rx-sidebar {
    order: initial;
  }
}

@media (max-width: 768px) {
  :root {
    --rx-header-height: 64px;
  }

  body {
    font-size: 0.98rem;
  }

  .rx-container,
  .container,
  .site-container,
  .wrap,
  .rx-container-narrow,
  .rx-container-wide {
    width: min(100% - 24px, 100%);
  }

  .rx-page-hero,
  .page-hero,
  .rx-archive-hero {
    padding: 2rem 0;
  }

  .rx-grid-2,
  .rx-grid-3 {
    grid-template-columns: 1fr;
  }

  .search-form {
    flex-direction: column;
  }

  .alignleft,
  .alignright {
    float: none;
    margin: 1rem 0;
  }
}

@media (max-width: 480px) {
  .rx-site-title,
  .site-title {
    font-size: 1.1rem;
  }

  .rx-site-description,
  .site-description {
    display: none;
  }

  .rx-logo img,
  .custom-logo {
    max-height: 40px;
  }

  .rx-header-actions > :not(.rx-menu-toggle):not(.menu-toggle):not(.rx-header-search-toggle) {
    display: none;
  }

  .rx-content-card,
  .page-card {
    padding: 1rem;
    border-radius: var(--rx-radius-lg);
  }

  .rx-page-title,
  .page-title,
  .entry-title {
    font-size: clamp(1.8rem, 10vw, 2.5rem);
  }
}

/* =========================================================
   27. PRINT BASIC
   ========================================================= */

@media print {
  *,
  *::before,
  *::after {
    color: #000000 !important;
    background: transparent !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }

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

  a,
  a:visited {
    text-decoration: underline;
  }

  .rx-site-header,
  .site-header,
  .rx-primary-nav,
  .main-navigation,
  .rx-sidebar,
  .widget-area,
  .rx-header-actions,
  .rx-menu-toggle,
  .menu-toggle {
    display: none !important;
  }

  .rx-container,
  .container,
  .site-container,
  .wrap {
    width: 100%;
    max-width: none;
  }

  .rx-page-content-wrap,
  .page-content-wrap {
    padding: 0;
  }
}

/* =========================================================
   28. REDUCED MOTION
   ========================================================= */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
  }
}

/* =========================================================
   29. HIGH CONTRAST SUPPORT
   ========================================================= */

@media (prefers-contrast: more) {
  :root {
    --rx-color-border: #64748b;
  }

  a {
    text-decoration-thickness: 0.12em;
  }

  .rx-btn,
  .button,
  .wp-block-button__link {
    border-width: 2px;
  }
}

/* =========================================================
   30. SAFE FALLBACKS
   ========================================================= */

.no-js .rx-primary-nav,
.no-js .main-navigation {
  display: block;
  position: static;
}

.no-js .rx-menu-toggle,
.no-js .menu-toggle {
  display: none;
}

img[loading="lazy"] {
  content-visibility: auto;
}

.rx-critical-ready {
  opacity: 1;
}

For best performance, load this file early in <head>, and keep your larger normal CSS files separate, for example:

assets/static/static-css/main/global.css
assets/static/static-css/components/components.css
assets/static/static-css/layout/layout.css
assets/static/static-css/pages/page.css

This critical-page.css should control only the first visible area, so your page loads fast and avoids layout shifting.

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