/*
Theme Name: Peptide Starter
Theme URI: https://github.com/peptiderepo/peptide-starter
Description: Premium, accessible WordPress theme for scientific peptide reference database
Author: Peptide Repo
Author URI: https://peptiderepo.com
Version: 1.4.0
License: GPL v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: peptide-starter
Domain Path: /languages
Requires at least: 6.0
Requires PHP: 7.4
*/

/* ============================================================================
   CSS ARCHITECTURE
   ============================================================================

   This stylesheet organizes theme styles in the following order:
   1. CSS Reset
   2. CSS Custom Properties (design tokens)
   3. Typography & Font Loading
   4. Global Styles & Layout
   5. Components (buttons, cards, forms, badges)
   6. Regions (header, footer, main)
   7. Pages (home, archive, single)
   8. Animations & Transitions
   9. Accessibility (focus, reduced motion)
   10. Dark Mode (color overrides)
   11. Responsive (mobile-first breakpoints)

   Philosophy:
   - Use CSS custom properties for all design tokens
   - Avoid !important on global elements (breaks plugins)
   - Scope styles with specificity, not cascade tricks
   - Respect plugin namespaces (.pn-*, .ps-*)
   - Mobile-first responsive approach

   ============================================================================ */

/* ============================================================================
   1. CSS RESET
   ============================================================================ */

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

body {
  margin: 0;
  padding: 0;
  line-height: 1.5;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  padding: 0;
}

p {
  margin: 0;
}

ul, ol {
  list-style: none;
}

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

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

img, svg {
  max-width: 100%;
  display: block;
}

/* ============================================================================
   2. CSS CUSTOM PROPERTIES (Design Tokens)
   ============================================================================ */

:root {
  /* ---- FONT FAMILIES ---- */
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", system-ui, sans-serif;
  --font-mono: "Monaco", "Menlo", "Ubuntu Mono", "Courier New", monospace;

  /* ---- TYPOGRAPHY SCALE (tightened for better content density) ---- */
  /* H1 */
  --text-h1: 36px;
  --text-h1-weight: 700;
  --text-h1-lh: 1.2;
  --text-h1-ls: -0.02em;

  /* H2 */
  --text-h2: 30px;
  --text-h2-weight: 700;
  --text-h2-lh: 1.25;
  --text-h2-ls: -0.015em;

  /* H3 */
  --text-h3: 24px;
  --text-h3-weight: 600;
  --text-h3-lh: 1.3;
  --text-h3-ls: -0.01em;

  /* H4 */
  --text-h4: 20px;
  --text-h4-weight: 600;
  --text-h4-lh: 1.35;
  --text-h4-ls: 0;

  /* H5 */
  --text-h5: 17px;
  --text-h5-weight: 700;
  --text-h5-lh: 1.4;
  --text-h5-ls: 0;

  /* H6 */
  --text-h6: 15px;
  --text-h6-weight: 500;
  --text-h6-lh: 1.4;
  --text-h6-ls: 0;

  /* Body (slightly smaller for density — still readable) */
  --text-body-lg: 15px;
  --text-body-md: 13px;
  --text-body-sm: 12px;

  /* Labels & Captions */
  --text-label: 11px;
  --text-label-weight: 500;
  --text-caption: 11px;
  --text-overline: 10px;
  --text-overline-weight: 600;

  /* Code */
  --text-code-inline: 14px;
  --text-code-block: 13px;
  --text-code-lh: 1.6;

  /* ---- SPACING SCALE (8px base grid) ---- */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;
  --spacing-4xl: 80px;
  --spacing-5xl: 96px;

  /* ---- BUTTON PADDING (unified per Design Director) ---- */
  --btn-padding-y: var(--spacing-md);
  --btn-padding-x: var(--spacing-xl);

  /* ---- LIGHT MODE COLOR PALETTE ---- */
  /* Brand Colors */
  --color-brand-primary: #0066CC;
  --color-status-success: #059669;
  --color-status-warning: #F59E0B;
  --color-status-error: #DC2626;

  /* Accent Colors (Clawdiverse-inspired warm tints for cards/categories) */
  --color-accent-warm: #F59E0B;
  --color-accent-mint: #D1FAE5;
  --color-accent-lavender: #EDE9FE;
  --color-accent-peach: #FEE2D5;
  --color-accent-sky: #DBEAFE;

  /* Featured badge */
  --color-featured-bg: #FEF3C7;
  --color-featured-text: #92400E;

  /* Text Colors */
  --color-text-primary: #111827;
  --color-text-secondary: #6B7280;
  --color-text-tertiary: #9CA3AF;

  /* Border Colors */
  --color-border-default: #E5E7EB;
  --color-border-subtle: #F3F4F6;

  /* Background Colors (warm off-white base, à la Clawdiverse) */
  --color-bg-primary: #FAFAF7;
  --color-bg-secondary: #F5F3EE;
  --color-bg-tertiary: #EDEAE3;

  /* Component-Specific Colors */
  --color-input-focus: #0066CC;
  --color-link-hover: #0052A3;
  --color-badge-bg: #DBEAFE;
  --color-badge-text: #0066CC;
  --color-code-bg: #F3F4F6;
  --color-code-text: #111827;

  /* ---- SHADOWS & ELEVATION ---- */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);

  /* ---- BORDERS & RADIUS ---- */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* ---- TRANSITIONS ---- */
  --transition-fast: 150ms ease-out;
  --transition-normal: 200ms ease-out;
  --transition-slow: 300ms ease-in-out;

  /* ---- FOCUS RING (per Design Director fix: 15% opacity) ---- */
  --focus-color: #0066CC;
  --focus-width: 2px;
  --focus-offset: 2px;
  --focus-shadow: 0 0 0 4px rgba(0, 102, 204, 0.15);

  /* ---- CONTAINER WIDTHS ---- */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 900px;
  --container-xl: 1024px;
  --container-2xl: 1280px;

  /* ---- Z-INDEX SCALE ---- */
  --z-dropdown: 10;
  --z-sticky: 20;
  --z-fixed: 30;
  --z-modal-backdrop: 40;
  --z-modal: 50;
}

/* ============================================================================
   3. TYPOGRAPHY & FONT LOADING
   ============================================================================ */

/* Load Inter from Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* Base typography */
body {
  font-family: var(--font-sans);
  font-size: var(--text-body-md);
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
}

/* Headings */
h1 {
  font-size: var(--text-h1);
  font-weight: var(--text-h1-weight);
  line-height: var(--text-h1-lh);
  letter-spacing: var(--text-h1-ls);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-md);
}

h2 {
  font-size: var(--text-h2);
  font-weight: var(--text-h2-weight);
  line-height: var(--text-h2-lh);
  letter-spacing: var(--text-h2-ls);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

h3 {
  font-size: var(--text-h3);
  font-weight: var(--text-h3-weight);
  line-height: var(--text-h3-lh);
  letter-spacing: var(--text-h3-ls);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
  margin-top: var(--spacing-lg);
}

h4 {
  font-size: var(--text-h4);
  font-weight: var(--text-h4-weight);
  line-height: var(--text-h4-lh);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

h5 {
  font-size: var(--text-h5);
  font-weight: var(--text-h5-weight);
  line-height: var(--text-h5-lh);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
}

h6 {
  font-size: var(--text-h6);
  font-weight: var(--text-h6-weight);
  line-height: var(--text-h6-lh);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
}

/* Paragraph */
p {
  font-size: var(--text-body-md);
  line-height: 1.6;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-md);
}

/* Small text */
small, .text-small {
  font-size: var(--text-body-sm);
  color: var(--color-text-secondary);
}

/* Code */
code {
  font-family: var(--font-mono);
  font-size: var(--text-code-inline);
  background-color: var(--color-code-bg);
  color: var(--color-code-text);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

pre {
  font-family: var(--font-mono);
  font-size: var(--text-code-block);
  line-height: var(--text-code-lh);
  background-color: var(--color-code-bg);
  color: var(--color-code-text);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin-bottom: var(--spacing-md);
}

pre code {
  background: none;
  padding: 0;
  border-radius: 0;
}

/* ============================================================================
   4. GLOBAL STYLES & LAYOUT
   ============================================================================ */

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Skip Link (accessibility) */
.skip-link {
  position: absolute;
  left: -9999px;
  z-index: var(--z-modal);
  padding: var(--spacing-md);
  background: var(--color-brand-primary);
  color: white;
  text-decoration: none;
  border-radius: var(--radius-sm);
}

.skip-link:focus {
  left: var(--spacing-md);
  top: var(--spacing-md);
}

/* Main content area */
#main {
  flex: 1;
  width: 100%;
}

/* Container for page content */
.ps-container {
  max-width: var(--container-lg);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  width: 100%;
}

.ps-container-wide {
  max-width: var(--container-2xl);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  width: 100%;
}

/* ============================================================================
   5. LINK STYLING (Scope: body content vs navigation)
   ============================================================================ */

/* Body content links: underlined */
.site-content a,
.post-content a,
article a,
.page-content a {
  color: var(--color-brand-primary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color var(--transition-normal);
}

.site-content a:hover,
.post-content a:hover,
article a:hover,
.page-content a:hover {
  color: var(--color-link-hover);
}

.site-content a:focus,
.post-content a:focus,
article a:focus,
.page-content a:focus {
  outline: var(--focus-width) solid var(--focus-color);
  outline-offset: var(--focus-offset);
}

/* Footer links: underlined */
.site-footer a {
  color: var(--color-brand-primary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color var(--transition-normal);
}

.site-footer a:hover {
  color: var(--color-link-hover);
}

/* Navigation links: NO underline (context is clear) */
nav a {
  text-decoration: none;
}

/* ============================================================================
   6. COMPONENTS
   ============================================================================ */

/* ---- BUTTONS ---- */

.ps-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--btn-padding-y) var(--btn-padding-x);
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: var(--text-body-md);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
}

.ps-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.ps-btn:focus {
  outline: none;
  box-shadow: var(--focus-shadow);
}

/* Primary Button */
.ps-btn-primary {
  background-color: var(--color-brand-primary);
  color: white;
}

.ps-btn-primary:hover {
  background-color: var(--color-link-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0, 102, 204, 0.2);
}

.ps-btn-primary:active {
  transform: translateY(0);
}

/* Secondary Button (ghost/outline style) */
.ps-btn-secondary {
  background-color: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
}

.ps-btn-secondary:hover {
  background-color: var(--color-bg-secondary);
  border-color: var(--color-brand-primary);
  color: var(--color-brand-primary);
}

/* Tertiary Button */
.ps-btn-tertiary {
  background-color: transparent;
  color: var(--color-brand-primary);
  border: 1px solid var(--color-brand-primary);
}

.ps-btn-tertiary:hover {
  background-color: var(--color-brand-primary);
  color: white;
}

/* Button Sizes */
.ps-btn-sm {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--text-body-sm);
}

.ps-btn-lg {
  padding: var(--spacing-lg) var(--spacing-2xl);
  font-size: var(--text-body-lg);
}

.ps-btn-full {
  width: 100%;
}

/* ---- CARDS ---- */

.ps-card {
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  transition: all var(--transition-normal);
}

.ps-card:hover {
  border-color: var(--color-brand-primary);
  box-shadow: 0 4px 12px rgba(0, 102, 204, 0.1);
}

.ps-card-header {
  margin-bottom: var(--spacing-md);
}

.ps-card-title {
  font-size: var(--text-h5);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
}

.ps-card-meta {
  font-size: var(--text-caption);
  color: var(--color-text-secondary);
}

.ps-card-content {
  font-size: var(--text-body-md);
  line-height: 1.6;
  color: var(--color-text-primary);
}

/* ---- BADGES & TAGS ---- */

.ps-badge {
  display: inline-block;
  padding: 4px 8px;
  border-radius: var(--radius-md);
  font-size: var(--text-label);
  font-weight: var(--text-label-weight);
  background-color: var(--color-badge-bg);
  color: var(--color-badge-text);
  white-space: nowrap;
}

.ps-badge-success {
  background-color: #D1FAE5;
  color: var(--color-status-success);
}

.ps-badge-warning {
  background-color: #FEF3C7;
  color: var(--color-status-warning);
}

.ps-badge-error {
  background-color: #FEE2E2;
  color: var(--color-status-error);
}

.ps-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 4px 8px;
  border-radius: var(--radius-md);
  font-size: var(--text-label);
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-primary);
  cursor: pointer;
  transition: all var(--transition-normal);
}

.ps-tag:hover {
  background-color: var(--color-border-default);
}

.ps-tag-close {
  width: 16px;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-weight: 600;
}

/* ---- FORMS ---- */

input[type="text"],
input[type="email"],
input[type="password"],
input[type="search"],
input[type="number"],
input[type="url"],
textarea,
select {
  width: 100%;
  padding: var(--spacing-md);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: var(--text-body-md);
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  transition: all var(--transition-normal);
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="search"]:focus,
input[type="number"]:focus,
input[type="url"]:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-brand-primary);
  box-shadow: var(--focus-shadow);
  background-color: var(--color-bg-secondary);
}

/* Form labels */
label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-size: var(--text-label);
  font-weight: var(--text-label-weight);
  color: var(--color-text-primary);
}

/* Form groups */
.ps-form-group {
  margin-bottom: var(--spacing-lg);
}

/* Form error state (per Design Director) */
input.ps-error,
textarea.ps-error,
select.ps-error {
  border-color: var(--color-status-error);
  background-color: rgba(220, 38, 38, 0.02);
}

.ps-form-error {
  color: var(--color-status-error);
  font-size: var(--text-caption);
  margin-top: 4px;
  font-weight: var(--text-label-weight);
}

/* Checkboxes & Radios */
input[type="checkbox"],
input[type="radio"] {
  width: 18px;
  height: 18px;
  margin: 0;
  margin-right: var(--spacing-sm);
  cursor: pointer;
  accent-color: var(--color-brand-primary);
}

/* ---- ALERTS & CALLOUTS ---- */

.ps-alert {
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  border-left: 4px solid;
  margin-bottom: var(--spacing-md);
}

.ps-alert-info {
  background-color: #DBEAFE;
  border-color: var(--color-brand-primary);
  color: #0652CD;
}

.ps-alert-success {
  background-color: #D1FAE5;
  border-color: var(--color-status-success);
  color: #065F46;
}

.ps-alert-warning {
  background-color: #FEF3C7;
  border-color: var(--color-status-warning);
  color: #78350F;
}

.ps-alert-error {
  background-color: #FEE2E2;
  border-color: var(--color-status-error);
  color: #7F1D1D;
}

/* ---- SEARCH FORM ---- */

.ps-search-form {
  position: relative;
  width: 100%;
}

.ps-search-input {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-md) var(--spacing-md) var(--spacing-lg);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  font-size: var(--text-body-md);
}

.ps-search-input:focus {
  outline: none;
  border-color: var(--color-brand-primary);
  box-shadow: var(--focus-shadow);
}

.ps-search-icon {
  position: absolute;
  right: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-secondary);
  pointer-events: none;
}

/* ---- PAGINATION ---- */

.ps-pagination {
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
  justify-content: center;
  margin: var(--spacing-2xl) 0;
  flex-wrap: wrap;
}

.ps-pagination a,
.ps-pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 var(--spacing-sm);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--color-text-primary);
  transition: all var(--transition-normal);
}

.ps-pagination a:hover {
  border-color: var(--color-brand-primary);
  background-color: var(--color-brand-primary);
  color: white;
}

.ps-pagination .current {
  background-color: var(--color-brand-primary);
  border-color: var(--color-brand-primary);
  color: white;
}

/* ============================================================================
   7. REGIONS (Header, Footer, Main)
   ============================================================================ */

/* ---- HEADER ---- */

.site-header {
  background-color: var(--color-bg-primary);
  border-bottom: 1px solid var(--color-border-subtle);
  padding: var(--spacing-lg) var(--spacing-xl);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  box-shadow: var(--shadow-sm);
}

/* Account for WP admin bar when logged in */
.admin-bar .site-header {
  top: 32px;
}

@media screen and (max-width: 782px) {
  .admin-bar .site-header {
    top: 46px;
  }
}

.site-header-wrapper {
  max-width: var(--container-2xl);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-lg);
}

/* Logo */
.site-logo {
  flex: 0 0 auto;
  font-size: 24px;
  font-weight: 700;
  color: var(--color-brand-primary);
  text-decoration: none;
  line-height: 1;
  transition: color var(--transition-normal);
}

.site-logo:hover {
  color: var(--color-link-hover);
}

.site-logo img {
  height: 32px;
  width: auto;
}

/* Primary Navigation */
.primary-navigation {
  display: flex;
  align-items: center;
  flex: 1;
  margin-left: var(--spacing-lg);
  margin-right: auto;
}

.primary-navigation ul {
  display: flex;
  gap: var(--spacing-xl);
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
}

.primary-navigation li {
  display: flex;
  align-items: center;
}

.primary-navigation a {
  font-size: var(--text-body-md);
  font-weight: 500;
  color: var(--color-text-primary);
  text-decoration: none;
  position: relative;
  transition: color var(--transition-normal);
}

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

.primary-navigation a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-brand-primary);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-normal);
}

.primary-navigation a:hover::after,
.primary-navigation a.active::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* Header Icons */
.header-icons {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.header-icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: none;
  background: none;
  color: var(--color-text-primary);
  cursor: pointer;
  transition: color var(--transition-normal);
  padding: 0;
}

.header-icon-btn:hover {
  color: var(--color-brand-primary);
}

.header-icon-btn:focus {
  outline: none;
  box-shadow: var(--focus-shadow);
  border-radius: var(--radius-md);
}

/* Header CTA button — hidden on mobile */
.ps-header-cta {
  display: none;
  border-radius: var(--radius-lg);
}

@media (min-width: 768px) {
  .ps-header-cta {
    display: inline-flex;
  }
}

/* Hamburger Menu */
.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: none;
  background: none;
  cursor: pointer;
  padding: 0;
  color: var(--color-text-primary);
}

/* Mobile Navigation */
.nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.3);
  opacity: 0;
  pointer-events: none;
  z-index: var(--z-modal-backdrop);
  transition: opacity var(--transition-slow);
}

.nav-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

/* ---- FOOTER ---- */

.site-footer {
  background-color: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border-subtle);
  padding: var(--spacing-3xl) var(--spacing-lg);
  margin-top: auto;
}

.footer-wrapper {
  max-width: var(--container-2xl);
  margin: 0 auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-3xl);
}

.footer-section h3 {
  font-size: var(--text-h5);
  margin-bottom: var(--spacing-lg);
}

.footer-section ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.footer-section a {
  color: var(--color-brand-primary);
  text-decoration: underline;
  transition: color var(--transition-normal);
}

.footer-section a:hover {
  color: var(--color-link-hover);
}

.footer-newsletter {
  background-color: var(--color-bg-tertiary);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-3xl);
}

.footer-newsletter h3 {
  margin-top: 0;
}

.newsletter-form {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-lg);
}

.newsletter-form input {
  flex: 1;
  min-width: 200px;
}

.newsletter-form button {
  flex: 0 0 auto;
}

.footer-bottom {
  border-top: 1px solid var(--color-border-default);
  padding-top: var(--spacing-2xl);
  text-align: center;
  color: var(--color-text-secondary);
  font-size: var(--text-body-sm);
}

/* ============================================================================
   8. PAGES
   ============================================================================ */

/* ---- HOME PAGE / HERO ---- */

.hero-section {
  background-color: var(--color-bg-primary);
  padding: var(--spacing-5xl) var(--spacing-xl) var(--spacing-4xl);
  text-align: center;
  position: relative;
  overflow: hidden;
}

/* Decorative geometric shapes (Clawdiverse-inspired) */
.hero-section::before,
.hero-section::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}

/* Soft pink circle — top left */
.hero-section::before {
  width: 200px;
  height: 200px;
  background: rgba(244, 114, 182, 0.10);
  top: 8%;
  left: -4%;
}

/* Mint/teal shape — right side */
.hero-section::after {
  width: 260px;
  height: 260px;
  background: rgba(52, 211, 153, 0.08);
  top: 20%;
  right: -6%;
}

.hero-content {
  max-width: var(--container-lg);
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: 48px;
  font-weight: 800;
  margin-bottom: var(--spacing-md);
  color: var(--color-text-primary);
  letter-spacing: -0.03em;
  line-height: 1.1;
}

/* Accent word in hero title */
.hero-title .ps-hero-accent {
  color: var(--color-brand-primary);
  position: relative;
  display: inline-block;
}

/* Wavy underline on accent word */
.hero-title .ps-hero-accent::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 6px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 8'%3E%3Cpath d='M0 4 Q12.5 0 25 4 T50 4 T75 4 T100 4' fill='none' stroke='%230066CC' stroke-width='2'/%3E%3C/svg%3E") repeat-x;
  background-size: 50px 6px;
}

.hero-subtitle {
  font-size: var(--text-body-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-2xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}

.hero-search {
  margin-bottom: var(--spacing-2xl);
}

/* Legacy theme search form (fallback when PSA plugin is not active) */
.hero-search .ps-search-form {
  max-width: 560px;
  margin: 0 auto;
}

.hero-search .ps-search-input {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  padding-right: 48px;
  background-color: #FFFFFF;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

/* ---- PEPTIDE SEARCH AI PLUGIN INTEGRATION ---- */

/* Hero search — constrain the PSA form to match hero layout */
.hero-search .psa-search-wrap {
  max-width: 560px;
  margin: 0 auto;
}

.hero-search .psa-search-input {
  background-color: #FFFFFF;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  font-size: var(--text-body-lg);
  padding: var(--spacing-md) var(--spacing-lg);
  box-shadow: var(--shadow-sm);
}

.hero-search .psa-search-input::placeholder {
  color: var(--color-text-tertiary);
}

.hero-search .psa-search-input:focus {
  outline: none;
  border-color: var(--color-brand-primary);
  box-shadow: var(--focus-shadow);
}

.hero-search .psa-search-btn {
  background-color: var(--color-brand-primary);
  color: white;
  border: none;
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  cursor: pointer;
  transition: background-color var(--transition-normal);
}

.hero-search .psa-search-btn:hover {
  background-color: var(--color-brand-hover);
}

.hero-search .psa-search-results {
  text-align: left;
  max-height: 400px;
  overflow-y: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border-default);
}

/* Search overlay — full-screen overlay triggered from header search icon */
.search-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: var(--z-modal, 1000);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 120px;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.search-overlay.active {
  opacity: 1;
  visibility: visible;
}

.search-overlay-inner {
  background-color: var(--color-bg-primary);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  width: 90%;
  max-width: 600px;
  position: relative;
  box-shadow: var(--shadow-xl);
  transform: translateY(-20px);
  transition: transform var(--transition-normal);
}

.search-overlay.active .search-overlay-inner {
  transform: translateY(0);
}

.search-overlay-close {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  background: none;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: var(--spacing-xs);
  border-radius: var(--radius-md);
  transition: color var(--transition-normal), background-color var(--transition-normal);
  z-index: 1;
}

.search-overlay-close:hover {
  color: var(--color-text-primary);
  background-color: var(--color-bg-secondary);
}

.search-overlay-content {
  padding-top: var(--spacing-sm);
}

/* PSA plugin styling inside the overlay */
.search-overlay .psa-search-input {
  background-color: var(--color-bg-secondary);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  font-size: var(--text-body-md);
  padding: var(--spacing-md) var(--spacing-lg);
}

.search-overlay .psa-search-input::placeholder {
  color: var(--color-text-tertiary);
}

.search-overlay .psa-search-input:focus {
  outline: none;
  border-color: var(--color-brand-primary);
  box-shadow: var(--focus-shadow);
}

.search-overlay .psa-search-btn {
  background-color: var(--color-brand-primary);
  color: white;
  border: none;
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  cursor: pointer;
  transition: background-color var(--transition-normal);
}

.search-overlay .psa-search-btn:hover {
  background-color: var(--color-brand-hover);
}

.search-overlay .psa-search-results {
  max-height: 350px;
  overflow-y: auto;
  border-radius: var(--radius-lg);
  margin-top: var(--spacing-md);
}

.search-overlay .psa-checking,
.search-overlay .psa-pending,
.search-overlay .psa-invalid,
.search-overlay .psa-error {
  margin-top: var(--spacing-md);
  border-radius: var(--radius-lg);
}

/* ---- PEPTIDE NEWS PLUGIN OVERRIDES ---- */
/* Remove line-clamp so full article summaries are visible.
   Uses body prefix for specificity to beat the plugin's own stylesheet
   which loads after the theme. */
body .pn-article-excerpt,
body p.pn-article-excerpt {
  -webkit-line-clamp: unset;
  -webkit-box-orient: unset;
  display: block;
  overflow: visible;
  font-size: var(--text-body-md);
  line-height: 1.6;
}

/* Tighten article card title for density */
body .pn-article-title {
  font-size: var(--text-h4);
  line-height: 1.3;
}

.hero-ctas {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

.hero-ctas .ps-btn {
  padding: var(--btn-padding-y) var(--btn-padding-x);
}

/* News Feed Area */
.news-feed-section {
  padding: var(--spacing-3xl) var(--spacing-lg);
  background-color: var(--color-bg-primary);
}

.news-feed-header {
  max-width: var(--container-lg);
  margin: 0 auto var(--spacing-2xl);
  text-align: center;
}

.news-feed-title {
  font-size: var(--text-h2);
  margin-bottom: var(--spacing-md);
}

.news-feed-description {
  color: var(--color-text-secondary);
  font-size: var(--text-body-md);
}

/* ---- ARCHIVE PAGE ---- */

.archive-header {
  padding: var(--spacing-3xl) var(--spacing-lg) var(--spacing-2xl);
  background-color: var(--color-bg-primary);
  position: relative;
  overflow: hidden;
}

/* Decorative shape on archive header */
.archive-header::after {
  content: '';
  position: absolute;
  width: 180px;
  height: 180px;
  background: rgba(52, 211, 153, 0.08);
  border-radius: 50%;
  top: -40px;
  right: -40px;
  pointer-events: none;
}

.archive-title {
  max-width: var(--container-lg);
  margin: 0 auto;
  font-size: var(--text-h2);
  color: var(--color-text-primary);
}

.archive-content {
  padding: var(--spacing-3xl) var(--spacing-lg);
}

.archive-filters {
  max-width: var(--container-lg);
  margin: 0 auto var(--spacing-2xl);
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  align-items: center;
}

.archive-search {
  flex: 1;
  min-width: 200px;
}

.archive-grid {
  max-width: var(--container-lg);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-2xl);
}

.peptides-grid {
  max-width: var(--container-2xl);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-2xl);
  padding: var(--spacing-3xl) var(--spacing-lg);
}

/* Peptide Card (Clawdiverse-inspired: white card, tinted left border, soft shadow) */
.peptide-card {
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border-default);
  border-left: 3px solid var(--color-accent-mint);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
  position: relative;
}

.peptide-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  border-left-width: 4px;
}

/* Category-coded left borders via nth-child for visual variety */
.peptide-card:nth-child(4n+1) { border-left-color: var(--color-accent-mint); }
.peptide-card:nth-child(4n+2) { border-left-color: var(--color-accent-sky); }
.peptide-card:nth-child(4n+3) { border-left-color: var(--color-accent-lavender); }
.peptide-card:nth-child(4n+4) { border-left-color: var(--color-accent-peach); }

.peptide-card__header {
  margin-bottom: var(--spacing-md);
}

.peptide-card__title {
  font-size: var(--text-h5);
  font-weight: 600;
  line-height: 1.3;
  margin: 0 0 var(--spacing-sm) 0;
}

.peptide-card__title a {
  color: var(--color-text-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.peptide-card__title a:hover {
  color: var(--color-brand-primary);
}

.peptide-card__meta {
  display: flex;
  gap: var(--spacing-xs);
  flex-wrap: wrap;
}

/* Category tag pills (Clawdiverse-style colored pills) */
.peptide-card__badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.3px;
  padding: 3px 10px;
  border-radius: 100px;
  background-color: var(--color-accent-mint);
  color: #065F46;
}

/* Cycle badge colors to match card border */
.peptide-card:nth-child(4n+2) .peptide-card__badge {
  background-color: var(--color-accent-sky);
  color: #1E3A5F;
}

.peptide-card:nth-child(4n+3) .peptide-card__badge {
  background-color: var(--color-accent-lavender);
  color: #4C1D95;
}

.peptide-card:nth-child(4n+4) .peptide-card__badge {
  background-color: var(--color-accent-peach);
  color: #7C2D12;
}

.peptide-card__excerpt {
  font-size: var(--text-body-md);
  line-height: 1.65;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-lg);
  flex: 1;
  overflow: hidden;
}

.peptide-card__footer {
  margin-top: auto;
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--color-border-subtle);
}

.peptide-card__link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--text-body-sm);
  font-weight: 600;
  color: var(--color-brand-primary);
  text-decoration: none;
  transition: gap var(--transition-fast), color var(--transition-fast);
}

.peptide-card__link:hover {
  color: var(--color-link-hover);
  gap: var(--spacing-sm);
}

.peptide-card__link svg {
  transition: transform var(--transition-fast);
}

.peptide-card__link:hover svg {
  transform: translateX(2px);
}

.archive-empty {
  text-align: center;
  padding: var(--spacing-4xl) var(--spacing-lg);
}

.archive-empty h2 {
  margin-top: 0;
}

.archive-empty p {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-2xl);
}

/* ---- SINGLE PAGE / PEPTIDE ---- */

.page-header {
  padding: var(--spacing-3xl) var(--spacing-lg) var(--spacing-2xl);
  background-color: var(--color-bg-primary);
  position: relative;
  overflow: hidden;
}

/* Decorative accent on page header */
.page-header::after {
  content: '';
  position: absolute;
  width: 160px;
  height: 160px;
  background: rgba(244, 114, 182, 0.08);
  border-radius: 50%;
  top: -30px;
  right: -30px;
  pointer-events: none;
}

.page-title {
  max-width: var(--container-lg);
  margin: 0 auto;
  font-size: var(--text-h1);
  font-weight: 800;
  letter-spacing: -0.02em;
  position: relative;
  z-index: 1;
}

.page-content {
  max-width: var(--container-lg);
  margin: 0 auto;
  padding: var(--spacing-3xl) var(--spacing-lg);
}

.page-content h2 {
  font-size: var(--text-h3);
  margin-top: var(--spacing-2xl);
  margin-bottom: var(--spacing-md);
}

.page-content h3 {
  font-size: var(--text-h4);
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
}

.page-content ul,
.page-content ol {
  margin-left: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.page-content li {
  margin-bottom: var(--spacing-sm);
}

/* Collapse empty Elementor/page-builder containers that add phantom space */
.page-content .elementor-section:empty,
.page-content .elementor-widget-wrap:empty,
.page-content .elementor-element:empty,
.page-content div:empty:not([data-peptide-news-feed]) {
  display: none;
}

/* ---- BACK LINK (breadcrumb-style) ---- */

.ps-back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--text-body-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  text-decoration: none;
  margin-bottom: var(--spacing-lg);
  transition: color var(--transition-fast);
}

.ps-back-link:hover {
  color: var(--color-brand-primary);
}

/* ---- FEATURED BADGE ---- */

.ps-featured-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  border-radius: 100px;
  font-size: var(--text-label);
  font-weight: 700;
  background-color: var(--color-featured-bg);
  color: var(--color-featured-text);
  margin-bottom: var(--spacing-md);
}

/* ---- PEPTIDE META CARDS (single page) ---- */

.peptide-meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-2xl);
}

.peptide-meta-card {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
}

.peptide-meta-card dt {
  font-size: var(--text-label);
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--spacing-xs);
}

.peptide-meta-card dd {
  font-size: var(--text-body-md);
  font-weight: 500;
  color: var(--color-text-primary);
}

.peptide-meta-card dd code {
  font-size: var(--text-body-sm);
}

/* ---- PEPTIDE CONTENT BOX (description block on single page) ---- */

.peptide-content-box {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
}

/* ---- SECTION HEADING WITH ICON (Clawdiverse-style) ---- */

.ps-section-heading {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--text-h3);
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  color: var(--color-text-primary);
}

.ps-section-heading .ps-section-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  font-size: 16px;
}

/* ---- DECORATIVE BODY SHAPES ---- */
/* Geometric accents on the main content area for visual warmth */

body > .site-main {
  position: relative;
}

/* Large peach blob — left side of body */
body > .site-main::before {
  content: '';
  position: absolute;
  width: 300px;
  height: 300px;
  background: rgba(254, 226, 213, 0.15);
  border-radius: 50%;
  top: 40%;
  left: -8%;
  pointer-events: none;
  z-index: 0;
}

/* Lavender ring — right side of body */
body > .site-main::after {
  content: '';
  position: absolute;
  width: 200px;
  height: 200px;
  border: 30px solid rgba(237, 233, 254, 0.12);
  border-radius: 50%;
  top: 65%;
  right: -3%;
  pointer-events: none;
  z-index: 0;
}

/* ---- 404 PAGE ---- */

.error-404 {
  text-align: center;
  padding: var(--spacing-4xl) var(--spacing-lg);
}

.error-404 h1 {
  font-size: var(--text-h1);
  margin-bottom: var(--spacing-lg);
}

.error-404 p {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-2xl);
  font-size: var(--text-body-md);
}

/* ============================================================================
   9. ANIMATIONS & TRANSITIONS
   ============================================================================ */

/* Fade in animation */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.fade-in {
  animation: fadeIn var(--transition-slow) ease-out;
}

/* Slide in from left */
@keyframes slideInLeft {
  from {
    transform: translateX(-100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.slide-in-left {
  animation: slideInLeft var(--transition-slow) ease-out;
}

/* Skeleton loading animation */
@keyframes shimmer {
  0% {
    background-position: -1000px 0;
  }
  100% {
    background-position: 1000px 0;
  }
}

.ps-skeleton {
  background: linear-gradient(
    90deg,
    var(--color-bg-tertiary) 25%,
    var(--color-border-default) 50%,
    var(--color-bg-tertiary) 75%
  );
  background-size: 1000px 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

/* ============================================================================
   10. ACCESSIBILITY
   ============================================================================ */

/* Focus visible style (keyboard focus) */
*:focus-visible {
  outline: var(--focus-width) solid var(--focus-color);
  outline-offset: var(--focus-offset);
}

/* Skip to main content link */
.skip-to-main {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-brand-primary);
  color: white;
  padding: var(--spacing-md);
  text-decoration: none;
  z-index: var(--z-modal);
}

.skip-to-main:focus {
  top: 0;
}

/* Visually hidden but accessible to screen readers */
.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;
}

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

/* ============================================================================
   11. DARK MODE
   ============================================================================

   Precedence (highest to lowest):
   1. html[data-theme="light"] or html[data-theme="dark"] (explicit user choice)
   2. @media (prefers-color-scheme: dark) (system preference)
   3. Default light mode (above)

   Plugin dark mode coordination:
   - Theme broadcasts dark mode changes via data-theme attribute on <html>
   - Plugin must watch this attribute and update colors accordingly
   - Plugin can also use CSS custom properties which theme controls

   ============================================================================ */

@media (prefers-color-scheme: dark) {
  :root {
    /* Brand Colors */
    --color-brand-primary: #3B82F6;
    --color-status-success: #10B981;
    --color-status-warning: #F59E0B;
    --color-status-error: #EF4444;

    /* Accent Colors (muted for dark mode) */
    --color-accent-warm: #D97706;
    --color-accent-mint: #064E3B;
    --color-accent-lavender: #312E81;
    --color-accent-peach: #7C2D12;
    --color-accent-sky: #1E3A5F;
    --color-featured-bg: #78350F;
    --color-featured-text: #FEF3C7;

    /* Text Colors */
    --color-text-primary: #F9FAFB;
    --color-text-secondary: #D1D5DB;
    --color-text-tertiary: #9CA3AF;

    /* Border Colors */
    --color-border-default: #374151;
    --color-border-subtle: #1F2937;

    /* Background Colors */
    --color-bg-primary: #111827;
    --color-bg-secondary: #1F2937;
    --color-bg-tertiary: #374151;

    /* Component-Specific Colors */
    --color-input-focus: #3B82F6;
    --color-link-hover: #60A5FA;
    --color-badge-bg: #0F172A;
    --color-badge-text: #60A5FA;
    --color-code-bg: #1F2937;
    --color-code-text: #F9FAFB;

    /* Focus shadow adjusted for dark mode */
    --focus-shadow: 0 0 0 4px rgba(59, 130, 246, 0.15);
  }
}

/* Allow manual dark mode toggle (explicit override) */
html[data-theme="dark"] {
  --color-brand-primary: #3B82F6;
  --color-status-success: #10B981;
  --color-status-warning: #F59E0B;
  --color-status-error: #EF4444;
  --color-accent-warm: #D97706;
  --color-accent-mint: #064E3B;
  --color-accent-lavender: #312E81;
  --color-accent-peach: #7C2D12;
  --color-accent-sky: #1E3A5F;
  --color-featured-bg: #78350F;
  --color-featured-text: #FEF3C7;
  --color-text-primary: #F9FAFB;
  --color-text-secondary: #D1D5DB;
  --color-text-tertiary: #9CA3AF;
  --color-border-default: #374151;
  --color-border-subtle: #1F2937;
  --color-bg-primary: #111827;
  --color-bg-secondary: #1F2937;
  --color-bg-tertiary: #374151;
  --color-input-focus: #3B82F6;
  --color-link-hover: #60A5FA;
  --color-badge-bg: #0F172A;
  --color-badge-text: #60A5FA;
  --color-code-bg: #1F2937;
  --color-code-text: #F9FAFB;
  --focus-shadow: 0 0 0 4px rgba(59, 130, 246, 0.15);
}

html[data-theme="light"] {
  --color-brand-primary: #0066CC;
  --color-status-success: #059669;
  --color-status-warning: #F59E0B;
  --color-status-error: #DC2626;
  --color-accent-warm: #F59E0B;
  --color-accent-mint: #D1FAE5;
  --color-accent-lavender: #EDE9FE;
  --color-accent-peach: #FEE2D5;
  --color-accent-sky: #DBEAFE;
  --color-featured-bg: #FEF3C7;
  --color-featured-text: #92400E;
  --color-text-primary: #111827;
  --color-text-secondary: #6B7280;
  --color-text-tertiary: #9CA3AF;
  --color-border-default: #E5E7EB;
  --color-border-subtle: #F3F4F6;
  --color-bg-primary: #FAFAF7;
  --color-bg-secondary: #F5F3EE;
  --color-bg-tertiary: #EDEAE3;
  --color-input-focus: #0066CC;
  --color-link-hover: #0052A3;
  --color-badge-bg: #DBEAFE;
  --color-badge-text: #0066CC;
  --color-code-bg: #F3F4F6;
  --color-code-text: #111827;
  --focus-shadow: 0 0 0 4px rgba(0, 102, 204, 0.15);
}

/* Dark mode alert colors */
@media (prefers-color-scheme: dark) {
  .ps-alert-info {
    background-color: #0C2340;
    border-color: #3B82F6;
    color: #BFDBFE;
  }

  .ps-alert-success {
    background-color: #064E3B;
    border-color: #10B981;
    color: #DCFCE7;
  }

  .ps-alert-warning {
    background-color: #78350F;
    border-color: #F59E0B;
    color: #FEF3C7;
  }

  .ps-alert-error {
    background-color: #7F1D1D;
    border-color: #EF4444;
    color: #FEE2E2;
  }

  .footer-newsletter {
    background-color: var(--color-bg-secondary);
  }
}

/* ============================================================================
   12. RESPONSIVE DESIGN (Mobile-first)
   ============================================================================ */

/* Hide decorative shapes on small screens */
@media (max-width: 767px) {
  .hero-section::before,
  .hero-section::after,
  .archive-header::after,
  .page-header::after,
  body > .site-main::before,
  body > .site-main::after {
    display: none;
  }
}

/* Extra Small (320px - 479px) */
@media (max-width: 479px) {
  .hero-section {
    padding: var(--spacing-2xl) var(--spacing-md);
  }

  .hero-title {
    font-size: 32px;
  }

  .hero-ctas {
    gap: var(--spacing-sm);
  }

  .hero-ctas .ps-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--text-body-sm);
  }

  .page-content {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  .peptides-grid {
    padding: var(--spacing-2xl) var(--spacing-md);
  }

  .news-feed-section {
    padding: var(--spacing-2xl) var(--spacing-md);
  }

  h1 {
    font-size: 32px;
  }

  h2 {
    font-size: 24px;
  }

  .site-header-wrapper {
    gap: var(--spacing-sm);
  }

  .primary-navigation {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .header-icons {
    gap: var(--spacing-sm);
  }

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

  .newsletter-form button {
    width: 100%;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
}

/* Small (480px - 767px) */
@media (min-width: 480px) {
  .site-header {
    padding: var(--spacing-lg) var(--spacing-lg);
  }
}

/* Medium (768px - 1023px) */
@media (min-width: 768px) {
  .menu-toggle {
    display: none;
  }

  .primary-navigation {
    display: flex !important;
    position: static;
    width: auto;
    height: auto;
    flex-direction: row;
    background: none;
    padding: 0;
    transition: none;
  }

  .nav-overlay {
    display: none;
  }

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

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

  .hero-title {
    font-size: 44px;
  }

  .newsletter-form {
    flex-direction: row;
  }

  .newsletter-form button {
    width: auto;
  }
}

/* Large (1024px - 1439px) */
@media (min-width: 1024px) {
  .peptides-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .site-header {
    padding: var(--spacing-lg) var(--spacing-xl);
  }

  .footer-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Extra Large (1440px+) */
@media (min-width: 1440px) {
  .peptides-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .site-header {
    padding: var(--spacing-lg) var(--spacing-2xl);
  }
}

/* ============================================================================
   13. UTILITY CLASSES
   ============================================================================ */

/* 404 Page Utilities */
.ps-404-search-form {
  margin: var(--spacing-2xl) 0;
}

.ps-404-cta-group {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================================================
   END OF STYLESHEET
   ============================================================================ */