right-sidebar.css

harun.bspt2014@gmail.com
I’ll build this as a production-style right-sidebar.css for RX Theme: CSS variables, layout, widgets, sticky behavior, responsive rules, accessibility, dark mode, RTL, print, and performance-safe utilities.

Yes friend — for this file:

assets/css/static-css/right-sidebar.css

Use this as an advanced static CSS foundation for the RX Theme right sidebar.

/* ==========================================================================
   RX Theme - Right Sidebar Static CSS
   File: assets/css/static-css/right-sidebar.css
   Purpose: Advanced right sidebar layout, widgets, sticky sidebar, responsive,
            accessibility, dark mode, RTL support, print optimization.
   Author: RX Theme
   ========================================================================== */


/* ==========================================================================
   1. Sidebar Root Variables
   ========================================================================== */

:root {
  --rx-sidebar-width: 330px;
  --rx-sidebar-min-width: 280px;
  --rx-sidebar-max-width: 380px;

  --rx-sidebar-gap: 24px;
  --rx-sidebar-inner-gap: 20px;

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

  --rx-sidebar-text: #1e293b;
  --rx-sidebar-text-soft: #475569;
  --rx-sidebar-text-muted: #64748b;

  --rx-sidebar-border: #e2e8f0;
  --rx-sidebar-border-strong: #cbd5e1;

  --rx-sidebar-link: #0f766e;
  --rx-sidebar-link-hover: #0d9488;

  --rx-sidebar-accent: #0f766e;
  --rx-sidebar-accent-soft: rgba(15, 118, 110, 0.08);
  --rx-sidebar-accent-border: rgba(15, 118, 110, 0.25);

  --rx-sidebar-radius-sm: 6px;
  --rx-sidebar-radius-md: 10px;
  --rx-sidebar-radius-lg: 14px;
  --rx-sidebar-radius-xl: 18px;

  --rx-sidebar-shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --rx-sidebar-shadow-md: 0 8px 22px rgba(15, 23, 42, 0.08);
  --rx-sidebar-shadow-lg: 0 16px 36px rgba(15, 23, 42, 0.12);

  --rx-sidebar-font-size: 15px;
  --rx-sidebar-small-font-size: 14px;
  --rx-sidebar-title-font-size: 18px;

  --rx-sidebar-line-height: 1.7;
  --rx-sidebar-transition: 180ms ease;
  --rx-sidebar-sticky-top: 96px;

  --rx-sidebar-z-index: 20;
}


/* ==========================================================================
   2. Main Right Sidebar Layout
   ========================================================================== */

.rx-right-sidebar {
  width: var(--rx-sidebar-width);
  min-width: var(--rx-sidebar-min-width);
  max-width: var(--rx-sidebar-max-width);
  color: var(--rx-sidebar-text);
  font-size: var(--rx-sidebar-font-size);
  line-height: var(--rx-sidebar-line-height);
  position: relative;
  z-index: var(--rx-sidebar-z-index);
}

.rx-right-sidebar,
.rx-right-sidebar * {
  box-sizing: border-box;
}

.rx-right-sidebar-area {
  display: flex;
  flex-direction: column;
  gap: var(--rx-sidebar-gap);
}

.rx-content-with-right-sidebar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--rx-sidebar-width);
  gap: clamp(24px, 4vw, 42px);
  align-items: start;
}

.rx-main-content {
  min-width: 0;
}

.rx-sidebar-right {
  min-width: 0;
}


/* ==========================================================================
   3. Sticky Sidebar
   ========================================================================== */

.rx-right-sidebar.is-sticky,
.rx-right-sidebar .rx-sidebar-sticky {
  position: sticky;
  top: var(--rx-sidebar-sticky-top);
  align-self: start;
}

.admin-bar .rx-right-sidebar.is-sticky,
.admin-bar .rx-right-sidebar .rx-sidebar-sticky {
  top: calc(var(--rx-sidebar-sticky-top) + 32px);
}


/* ==========================================================================
   4. Sidebar Widget Base
   ========================================================================== */

.rx-right-sidebar .widget,
.rx-right-sidebar .rx-widget,
.rx-sidebar-widget {
  background: var(--rx-sidebar-bg);
  border: 1px solid var(--rx-sidebar-border);
  border-radius: var(--rx-sidebar-radius-lg);
  box-shadow: var(--rx-sidebar-shadow-sm);
  padding: 22px;
  overflow: hidden;
  transition:
    box-shadow var(--rx-sidebar-transition),
    border-color var(--rx-sidebar-transition),
    transform var(--rx-sidebar-transition);
}

.rx-right-sidebar .widget:hover,
.rx-right-sidebar .rx-widget:hover,
.rx-sidebar-widget:hover {
  border-color: var(--rx-sidebar-border-strong);
  box-shadow: var(--rx-sidebar-shadow-md);
}

.rx-right-sidebar .widget + .widget,
.rx-right-sidebar .rx-widget + .rx-widget,
.rx-sidebar-widget + .rx-sidebar-widget {
  margin-top: var(--rx-sidebar-gap);
}


/* ==========================================================================
   5. Widget Titles
   ========================================================================== */

.rx-right-sidebar .widget-title,
.rx-right-sidebar .rx-widget-title,
.rx-sidebar-widget-title {
  position: relative;
  margin: 0 0 18px;
  padding-bottom: 12px;
  color: var(--rx-sidebar-text);
  font-size: var(--rx-sidebar-title-font-size);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.rx-right-sidebar .widget-title::after,
.rx-right-sidebar .rx-widget-title::after,
.rx-sidebar-widget-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 42px;
  height: 3px;
  border-radius: 999px;
  background: var(--rx-sidebar-accent);
}

.rx-right-sidebar .widget-title::before,
.rx-right-sidebar .rx-widget-title::before,
.rx-sidebar-widget-title::before {
  content: "";
  position: absolute;
  left: 48px;
  bottom: 1px;
  width: 8px;
  height: 2px;
  border-radius: 999px;
  background: var(--rx-sidebar-accent-border);
}


/* ==========================================================================
   6. Sidebar Typography
   ========================================================================== */

.rx-right-sidebar p {
  margin: 0 0 14px;
  color: var(--rx-sidebar-text-soft);
}

.rx-right-sidebar p:last-child {
  margin-bottom: 0;
}

.rx-right-sidebar strong,
.rx-right-sidebar b {
  color: var(--rx-sidebar-text);
  font-weight: 700;
}

.rx-right-sidebar small {
  color: var(--rx-sidebar-text-muted);
  font-size: var(--rx-sidebar-small-font-size);
}

.rx-right-sidebar hr {
  border: 0;
  border-top: 1px solid var(--rx-sidebar-border);
  margin: 18px 0;
}


/* ==========================================================================
   7. Sidebar Links
   ========================================================================== */

.rx-right-sidebar a {
  color: var(--rx-sidebar-link);
  text-decoration: none;
  text-underline-offset: 3px;
  transition:
    color var(--rx-sidebar-transition),
    background-color var(--rx-sidebar-transition),
    border-color var(--rx-sidebar-transition);
}

.rx-right-sidebar a:hover,
.rx-right-sidebar a:focus {
  color: var(--rx-sidebar-link-hover);
  text-decoration: underline;
}

.rx-right-sidebar a:focus-visible {
  outline: 3px solid var(--rx-sidebar-accent-border);
  outline-offset: 3px;
  border-radius: var(--rx-sidebar-radius-sm);
}


/* ==========================================================================
   8. Lists Inside Sidebar
   ========================================================================== */

.rx-right-sidebar ul,
.rx-right-sidebar ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.rx-right-sidebar li {
  position: relative;
  margin: 0;
  padding: 10px 0;
  border-bottom: 1px solid var(--rx-sidebar-border);
}

.rx-right-sidebar li:first-child {
  padding-top: 0;
}

.rx-right-sidebar li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.rx-right-sidebar li a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--rx-sidebar-text-soft);
  font-weight: 500;
}

.rx-right-sidebar li a:hover {
  color: var(--rx-sidebar-accent);
}


/* ==========================================================================
   9. Default WordPress Widgets
   ========================================================================== */

/* Search Widget */
.rx-right-sidebar .widget_search form,
.rx-right-sidebar .search-form {
  display: flex;
  gap: 8px;
  width: 100%;
}

.rx-right-sidebar .search-field,
.rx-right-sidebar input[type="search"],
.rx-right-sidebar input[type="text"],
.rx-right-sidebar input[type="email"] {
  width: 100%;
  min-height: 44px;
  padding: 10px 13px;
  color: var(--rx-sidebar-text);
  background: var(--rx-sidebar-bg-soft);
  border: 1px solid var(--rx-sidebar-border);
  border-radius: var(--rx-sidebar-radius-md);
  font: inherit;
  outline: none;
  transition:
    border-color var(--rx-sidebar-transition),
    box-shadow var(--rx-sidebar-transition),
    background-color var(--rx-sidebar-transition);
}

.rx-right-sidebar .search-field:focus,
.rx-right-sidebar input[type="search"]:focus,
.rx-right-sidebar input[type="text"]:focus,
.rx-right-sidebar input[type="email"]:focus {
  background: #ffffff;
  border-color: var(--rx-sidebar-accent);
  box-shadow: 0 0 0 4px var(--rx-sidebar-accent-soft);
}

.rx-right-sidebar .search-submit,
.rx-right-sidebar button,
.rx-right-sidebar input[type="submit"] {
  min-height: 44px;
  padding: 10px 16px;
  color: #ffffff;
  background: var(--rx-sidebar-accent);
  border: 1px solid var(--rx-sidebar-accent);
  border-radius: var(--rx-sidebar-radius-md);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition:
    background-color var(--rx-sidebar-transition),
    border-color var(--rx-sidebar-transition),
    transform var(--rx-sidebar-transition),
    box-shadow var(--rx-sidebar-transition);
}

.rx-right-sidebar .search-submit:hover,
.rx-right-sidebar button:hover,
.rx-right-sidebar input[type="submit"]:hover {
  background: var(--rx-sidebar-link-hover);
  border-color: var(--rx-sidebar-link-hover);
  box-shadow: var(--rx-sidebar-shadow-sm);
}

.rx-right-sidebar .search-submit:active,
.rx-right-sidebar button:active,
.rx-right-sidebar input[type="submit"]:active {
  transform: translateY(1px);
}


/* Recent Posts */
.rx-right-sidebar .widget_recent_entries li a {
  font-weight: 600;
  line-height: 1.5;
}

.rx-right-sidebar .post-date {
  display: block;
  margin-top: 4px;
  color: var(--rx-sidebar-text-muted);
  font-size: 13px;
}


/* Categories */
.rx-right-sidebar .widget_categories li,
.rx-right-sidebar .widget_archive li {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  color: var(--rx-sidebar-text-muted);
}

.rx-right-sidebar .widget_categories li a,
.rx-right-sidebar .widget_archive li a {
  flex: 1;
}


/* Tag Cloud */
.rx-right-sidebar .tagcloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.rx-right-sidebar .tagcloud a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 5px 10px;
  color: var(--rx-sidebar-text-soft);
  background: var(--rx-sidebar-bg-soft);
  border: 1px solid var(--rx-sidebar-border);
  border-radius: 999px;
  font-size: 13px !important;
  font-weight: 600;
  line-height: 1.2;
}

.rx-right-sidebar .tagcloud a:hover {
  color: var(--rx-sidebar-accent);
  background: var(--rx-sidebar-accent-soft);
  border-color: var(--rx-sidebar-accent-border);
  text-decoration: none;
}


/* Calendar Widget */
.rx-right-sidebar .calendar_wrap {
  overflow-x: auto;
}

.rx-right-sidebar table {
  width: 100%;
  border-collapse: collapse;
  color: var(--rx-sidebar-text-soft);
  font-size: 14px;
}

.rx-right-sidebar th,
.rx-right-sidebar td {
  padding: 8px;
  text-align: center;
  border: 1px solid var(--rx-sidebar-border);
}

.rx-right-sidebar th {
  color: var(--rx-sidebar-text);
  background: var(--rx-sidebar-bg-soft);
  font-weight: 700;
}

.rx-right-sidebar caption {
  margin-bottom: 10px;
  color: var(--rx-sidebar-text);
  font-weight: 700;
}


/* ==========================================================================
   10. RX Custom Medical Sidebar Widgets
   ========================================================================== */

.rx-medical-widget {
  background:
    linear-gradient(180deg, rgba(15, 118, 110, 0.06), transparent 120px),
    var(--rx-sidebar-bg);
}

.rx-medical-widget .rx-widget-title {
  color: var(--rx-sidebar-accent);
}

.rx-health-note,
.rx-sidebar-note {
  padding: 14px 16px;
  color: var(--rx-sidebar-text-soft);
  background: var(--rx-sidebar-accent-soft);
  border: 1px solid var(--rx-sidebar-accent-border);
  border-radius: var(--rx-sidebar-radius-md);
  font-size: 14px;
}

.rx-health-note strong,
.rx-sidebar-note strong {
  color: var(--rx-sidebar-accent);
}


/* Disease List Widget */
.rx-disease-list {
  display: grid;
  gap: 8px;
}

.rx-disease-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 11px 13px;
  color: var(--rx-sidebar-text-soft);
  background: var(--rx-sidebar-bg-soft);
  border: 1px solid var(--rx-sidebar-border);
  border-radius: var(--rx-sidebar-radius-md);
  font-weight: 600;
}

.rx-disease-list a:hover {
  color: var(--rx-sidebar-accent);
  background: #ffffff;
  border-color: var(--rx-sidebar-accent-border);
  text-decoration: none;
}

.rx-disease-list a::after {
  content: "›";
  color: var(--rx-sidebar-text-muted);
  font-size: 20px;
  line-height: 1;
}


/* Popular Article Card */
.rx-sidebar-post-card {
  display: grid;
  grid-template-columns: 86px minmax(0, 1fr);
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--rx-sidebar-border);
}

.rx-sidebar-post-card:first-child {
  padding-top: 0;
}

.rx-sidebar-post-card:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.rx-sidebar-post-card img {
  width: 86px;
  height: 72px;
  object-fit: cover;
  border-radius: var(--rx-sidebar-radius-md);
  background: var(--rx-sidebar-bg-muted);
}

.rx-sidebar-post-card-title {
  margin: 0 0 5px;
  color: var(--rx-sidebar-text);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
}

.rx-sidebar-post-card-title a {
  color: inherit;
}

.rx-sidebar-post-card-title a:hover {
  color: var(--rx-sidebar-accent);
}

.rx-sidebar-post-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  color: var(--rx-sidebar-text-muted);
  font-size: 12px;
  line-height: 1.4;
}


/* Author Doctor Box */
.rx-sidebar-author-box {
  text-align: center;
}

.rx-sidebar-author-avatar {
  width: 92px;
  height: 92px;
  margin: 0 auto 14px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--rx-sidebar-accent-soft);
}

.rx-sidebar-author-name {
  margin: 0 0 4px;
  color: var(--rx-sidebar-text);
  font-size: 18px;
  font-weight: 800;
}

.rx-sidebar-author-role {
  margin: 0 0 12px;
  color: var(--rx-sidebar-text-muted);
  font-size: 14px;
}

.rx-sidebar-author-bio {
  color: var(--rx-sidebar-text-soft);
  font-size: 14px;
}


/* CTA Widget */
.rx-sidebar-cta {
  padding: 24px;
  color: #ffffff;
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.22), transparent 34%),
    linear-gradient(135deg, #0f766e, #115e59);
  border: 0;
}

.rx-sidebar-cta .rx-widget-title,
.rx-sidebar-cta h2,
.rx-sidebar-cta h3,
.rx-sidebar-cta p {
  color: #ffffff;
}

.rx-sidebar-cta .rx-widget-title::after {
  background: rgba(255, 255, 255, 0.9);
}

.rx-sidebar-cta a {
  color: #ffffff;
  font-weight: 700;
  text-decoration: underline;
}

.rx-sidebar-cta-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  margin-top: 12px;
  padding: 10px 16px;
  color: var(--rx-sidebar-accent) !important;
  background: #ffffff;
  border-radius: 999px;
  font-weight: 800;
  text-decoration: none !important;
}

.rx-sidebar-cta-button:hover {
  background: #f8fafc;
  transform: translateY(-1px);
}


/* ==========================================================================
   11. Table of Contents Sidebar
   ========================================================================== */

.rx-sidebar-toc {
  counter-reset: rx-toc-counter;
}

.rx-sidebar-toc ol,
.rx-sidebar-toc ul {
  display: grid;
  gap: 6px;
}

.rx-sidebar-toc li {
  counter-increment: rx-toc-counter;
  border-bottom: 0;
  padding: 0;
}

.rx-sidebar-toc a {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 9px;
  align-items: start;
  padding: 8px 10px;
  color: var(--rx-sidebar-text-soft);
  border-radius: var(--rx-sidebar-radius-md);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.45;
}

.rx-sidebar-toc a::before {
  content: counter(rx-toc-counter);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  color: var(--rx-sidebar-accent);
  background: var(--rx-sidebar-accent-soft);
  border-radius: 50%;
  font-size: 12px;
  font-weight: 800;
}

.rx-sidebar-toc a:hover,
.rx-sidebar-toc a.is-active {
  color: var(--rx-sidebar-accent);
  background: var(--rx-sidebar-accent-soft);
  text-decoration: none;
}


/* ==========================================================================
   12. Newsletter Widget
   ========================================================================== */

.rx-sidebar-newsletter {
  background:
    linear-gradient(180deg, var(--rx-sidebar-bg-soft), #ffffff);
}

.rx-sidebar-newsletter-form {
  display: grid;
  gap: 10px;
}

.rx-sidebar-newsletter input[type="email"] {
  width: 100%;
}

.rx-sidebar-newsletter button {
  width: 100%;
}

.rx-sidebar-newsletter-privacy {
  color: var(--rx-sidebar-text-muted);
  font-size: 12px;
  line-height: 1.5;
}


/* ==========================================================================
   13. Sidebar Badges / Chips
   ========================================================================== */

.rx-sidebar-badge,
.rx-sidebar-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 28px;
  padding: 4px 9px;
  color: var(--rx-sidebar-accent);
  background: var(--rx-sidebar-accent-soft);
  border: 1px solid var(--rx-sidebar-accent-border);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 800;
  line-height: 1.2;
}

.rx-sidebar-chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}


/* ==========================================================================
   14. Sidebar Advertisement Box
   ========================================================================== */

.rx-sidebar-ad {
  display: grid;
  place-items: center;
  min-height: 250px;
  padding: 16px;
  color: var(--rx-sidebar-text-muted);
  background:
    repeating-linear-gradient(
      45deg,
      var(--rx-sidebar-bg-soft),
      var(--rx-sidebar-bg-soft) 10px,
      #ffffff 10px,
      #ffffff 20px
    );
  border: 1px dashed var(--rx-sidebar-border-strong);
  border-radius: var(--rx-sidebar-radius-lg);
  text-align: center;
  font-size: 13px;
}

.rx-sidebar-ad-label {
  display: block;
  margin-bottom: 8px;
  color: var(--rx-sidebar-text-muted);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}


/* ==========================================================================
   15. Sidebar Accordion
   ========================================================================== */

.rx-sidebar-accordion {
  border: 1px solid var(--rx-sidebar-border);
  border-radius: var(--rx-sidebar-radius-lg);
  overflow: hidden;
}

.rx-sidebar-accordion-item + .rx-sidebar-accordion-item {
  border-top: 1px solid var(--rx-sidebar-border);
}

.rx-sidebar-accordion-button {
  width: 100%;
  min-height: 48px;
  padding: 13px 15px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--rx-sidebar-text);
  background: #ffffff;
  border: 0;
  border-radius: 0;
  text-align: left;
  font-weight: 700;
}

.rx-sidebar-accordion-button::after {
  content: "+";
  font-weight: 800;
}

.rx-sidebar-accordion-item.is-open .rx-sidebar-accordion-button::after {
  content: "–";
}

.rx-sidebar-accordion-panel {
  display: none;
  padding: 0 15px 15px;
  color: var(--rx-sidebar-text-soft);
}

.rx-sidebar-accordion-item.is-open .rx-sidebar-accordion-panel {
  display: block;
}


/* ==========================================================================
   16. Sidebar Loading Skeleton
   ========================================================================== */

.rx-sidebar-skeleton {
  display: grid;
  gap: 12px;
}

.rx-sidebar-skeleton-line,
.rx-sidebar-skeleton-thumb {
  position: relative;
  overflow: hidden;
  background: var(--rx-sidebar-bg-muted);
  border-radius: var(--rx-sidebar-radius-md);
}

.rx-sidebar-skeleton-line {
  height: 14px;
}

.rx-sidebar-skeleton-line.is-short {
  width: 65%;
}

.rx-sidebar-skeleton-thumb {
  height: 86px;
}

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

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


/* ==========================================================================
   17. Sidebar Image Handling
   ========================================================================== */

.rx-right-sidebar img,
.rx-right-sidebar video,
.rx-right-sidebar iframe {
  max-width: 100%;
}

.rx-right-sidebar img {
  height: auto;
}

.rx-right-sidebar figure {
  margin: 0;
}

.rx-right-sidebar figcaption {
  margin-top: 8px;
  color: var(--rx-sidebar-text-muted);
  font-size: 13px;
  line-height: 1.5;
}

.rx-sidebar-rounded-media {
  border-radius: var(--rx-sidebar-radius-lg);
  overflow: hidden;
}


/* ==========================================================================
   18. Sidebar Utility Classes
   ========================================================================== */

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

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

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

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

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

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

.rx-sidebar-mt-sm {
  margin-top: 8px !important;
}

.rx-sidebar-mt-md {
  margin-top: 16px !important;
}

.rx-sidebar-mt-lg {
  margin-top: 24px !important;
}

.rx-sidebar-p-0 {
  padding: 0 !important;
}

.rx-sidebar-soft-box {
  padding: 14px;
  background: var(--rx-sidebar-bg-soft);
  border-radius: var(--rx-sidebar-radius-md);
}

.rx-sidebar-border-box {
  padding: 14px;
  border: 1px solid var(--rx-sidebar-border);
  border-radius: var(--rx-sidebar-radius-md);
}


/* ==========================================================================
   19. Accessibility Helpers
   ========================================================================== */

.rx-right-sidebar :focus-visible {
  outline: 3px solid var(--rx-sidebar-accent-border);
  outline-offset: 3px;
}

.rx-sidebar-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}


/* ==========================================================================
   20. Reduced Motion
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  .rx-right-sidebar *,
  .rx-right-sidebar *::before,
  .rx-right-sidebar *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
  }
}


/* ==========================================================================
   21. Dark Mode Support
   ========================================================================== */

@media (prefers-color-scheme: dark) {
  :root {
    --rx-sidebar-bg: #0f172a;
    --rx-sidebar-bg-soft: #111827;
    --rx-sidebar-bg-muted: #1e293b;

    --rx-sidebar-text: #e5e7eb;
    --rx-sidebar-text-soft: #cbd5e1;
    --rx-sidebar-text-muted: #94a3b8;

    --rx-sidebar-border: rgba(148, 163, 184, 0.22);
    --rx-sidebar-border-strong: rgba(148, 163, 184, 0.36);

    --rx-sidebar-link: #5eead4;
    --rx-sidebar-link-hover: #99f6e4;

    --rx-sidebar-accent: #2dd4bf;
    --rx-sidebar-accent-soft: rgba(45, 212, 191, 0.12);
    --rx-sidebar-accent-border: rgba(45, 212, 191, 0.35);

    --rx-sidebar-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.35);
    --rx-sidebar-shadow-md: 0 8px 22px rgba(0, 0, 0, 0.42);
  }

  .rx-right-sidebar .search-field:focus,
  .rx-right-sidebar input[type="search"]:focus,
  .rx-right-sidebar input[type="text"]:focus,
  .rx-right-sidebar input[type="email"]:focus {
    background: #0f172a;
  }

  .rx-sidebar-accordion-button {
    background: var(--rx-sidebar-bg);
  }

  .rx-sidebar-newsletter {
    background:
      linear-gradient(180deg, var(--rx-sidebar-bg-soft), var(--rx-sidebar-bg));
  }

  .rx-sidebar-skeleton-line::after,
  .rx-sidebar-skeleton-thumb::after {
    background: linear-gradient(
      90deg,
      transparent,
      rgba(255, 255, 255, 0.08),
      transparent
    );
  }
}


/* Manual dark mode class support */
.rx-dark-mode .rx-right-sidebar,
[data-theme="dark"] .rx-right-sidebar {
  --rx-sidebar-bg: #0f172a;
  --rx-sidebar-bg-soft: #111827;
  --rx-sidebar-bg-muted: #1e293b;
  --rx-sidebar-text: #e5e7eb;
  --rx-sidebar-text-soft: #cbd5e1;
  --rx-sidebar-text-muted: #94a3b8;
  --rx-sidebar-border: rgba(148, 163, 184, 0.22);
  --rx-sidebar-border-strong: rgba(148, 163, 184, 0.36);
  --rx-sidebar-link: #5eead4;
  --rx-sidebar-link-hover: #99f6e4;
  --rx-sidebar-accent: #2dd4bf;
  --rx-sidebar-accent-soft: rgba(45, 212, 191, 0.12);
  --rx-sidebar-accent-border: rgba(45, 212, 191, 0.35);
}


/* ==========================================================================
   22. RTL Support
   ========================================================================== */

[dir="rtl"] .rx-content-with-right-sidebar {
  grid-template-columns: var(--rx-sidebar-width) minmax(0, 1fr);
}

[dir="rtl"] .rx-right-sidebar .widget-title::after,
[dir="rtl"] .rx-right-sidebar .rx-widget-title::after,
[dir="rtl"] .rx-sidebar-widget-title::after {
  left: auto;
  right: 0;
}

[dir="rtl"] .rx-right-sidebar .widget-title::before,
[dir="rtl"] .rx-right-sidebar .rx-widget-title::before,
[dir="rtl"] .rx-sidebar-widget-title::before {
  left: auto;
  right: 48px;
}

[dir="rtl"] .rx-disease-list a::after {
  content: "‹";
}

[dir="rtl"] .rx-sidebar-accordion-button {
  text-align: right;
}


/* ==========================================================================
   23. Responsive Sidebar
   ========================================================================== */

@media (max-width: 1180px) {
  :root {
    --rx-sidebar-width: 300px;
  }

  .rx-content-with-right-sidebar {
    gap: 28px;
  }

  .rx-right-sidebar .widget,
  .rx-right-sidebar .rx-widget,
  .rx-sidebar-widget {
    padding: 20px;
  }
}

@media (max-width: 1024px) {
  .rx-content-with-right-sidebar {
    grid-template-columns: 1fr;
  }

  .rx-right-sidebar {
    width: 100%;
    min-width: 0;
    max-width: none;
  }

  .rx-right-sidebar.is-sticky,
  .rx-right-sidebar .rx-sidebar-sticky {
    position: static;
    top: auto;
  }

  .rx-right-sidebar-area {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }

  .rx-right-sidebar .widget + .widget,
  .rx-right-sidebar .rx-widget + .rx-widget,
  .rx-sidebar-widget + .rx-sidebar-widget {
    margin-top: 0;
  }
}

@media (max-width: 768px) {
  .rx-right-sidebar-area {
    grid-template-columns: 1fr;
  }

  .rx-right-sidebar .widget,
  .rx-right-sidebar .rx-widget,
  .rx-sidebar-widget {
    padding: 18px;
    border-radius: var(--rx-sidebar-radius-md);
  }

  .rx-sidebar-post-card {
    grid-template-columns: 78px minmax(0, 1fr);
  }

  .rx-sidebar-post-card img {
    width: 78px;
    height: 66px;
  }
}

@media (max-width: 480px) {
  .rx-right-sidebar {
    font-size: 14px;
  }

  .rx-right-sidebar .widget-title,
  .rx-right-sidebar .rx-widget-title,
  .rx-sidebar-widget-title {
    font-size: 17px;
  }

  .rx-right-sidebar .widget,
  .rx-right-sidebar .rx-widget,
  .rx-sidebar-widget {
    padding: 16px;
  }

  .rx-right-sidebar .widget_search form,
  .rx-right-sidebar .search-form {
    flex-direction: column;
  }

  .rx-right-sidebar .search-submit,
  .rx-right-sidebar button,
  .rx-right-sidebar input[type="submit"] {
    width: 100%;
  }
}


/* ==========================================================================
   24. Container Query Support
   ========================================================================== */

@container rx-sidebar-container (max-width: 300px) {
  .rx-sidebar-post-card {
    grid-template-columns: 1fr;
  }

  .rx-sidebar-post-card img {
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
  }
}

.rx-right-sidebar {
  container-type: inline-size;
  container-name: rx-sidebar-container;
}


/* ==========================================================================
   25. Print Optimization
   ========================================================================== */

@media print {
  .rx-right-sidebar {
    display: none !important;
  }
}

Add it in your theme enqueue system like this:

wp_enqueue_style(
    'rx-right-sidebar',
    get_template_directory_uri() . '/assets/css/static-css/right-sidebar.css',
    array(),
    wp_get_theme()->get('Version')
);

Best class structure for your theme HTML:

<div class="rx-content-with-right-sidebar">
  <main class="rx-main-content">
    <!-- post content -->
  </main>

  <aside class="rx-right-sidebar rx-sidebar-right is-sticky">
    <div class="rx-right-sidebar-area">
      <section class="rx-sidebar-widget rx-medical-widget">
        <h2 class="rx-sidebar-widget-title">Health Topics</h2>
      </section>
    </div>
  </aside>
</div>

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