/*
Theme Name: Serge3DX Tools
Theme URI: https://serge3dx.com/
Author: Serge3DX Engineering Team
Author URI: https://serge3dx.com/about/
Description: Production-ready, ultra-lightweight, SEO-optimized WordPress theme for interactive relationship, dating, and communication tools. All styles are inlined for zero render-blocking imports.
Version: 2.1.0
Requires at least: 6.4
Tested up to: 6.7
Requires PHP: 8.3
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: serge3dx
Tags: light, full-width-template, custom-menu, block-patterns, accessibility-ready, editor-style, threaded-comments, translation-ready
*/


/* ---- variables.css ---- */
/**
 * Serge3DX Design Tokens & CSS Variables
 * Pure Light Theme - Zero Dark Mode
 */
:root {
  /* Color Palette */
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-surface-subtle: #f1f5f9;
  --color-surface-hover: #e2e8f0;
  
  --color-text: #0f172a;
  --color-text-secondary: #334155;
  --color-text-muted: #64748b;
  --color-text-subtle: #94a3b8;
  
  --color-primary: #4338ca;
  --color-primary-hover: #3730a3;
  --color-primary-light: #e0e7ff;
  --color-primary-subtle: #eef2ff;
  
  --color-secondary: #0284c7;
  --color-secondary-hover: #0369a1;
  --color-secondary-light: #e0f2fe;
  
  --color-accent: #0d9488;
  --color-accent-light: #f0fdfa;

  --color-border: #e2e8f0;
  --color-border-subtle: #cbd5e1;
  --color-border-focus: #4338ca;
  
  --color-success: #15803d;
  --color-success-bg: #f0fdf4;
  --color-success-border: #bbf7d0;
  
  --color-warning: #b45309;
  --color-warning-bg: #fffbeb;
  --color-warning-border: #fde68a;
  
  --color-error: #b91c1c;
  --color-error-bg: #fef2f2;
  --color-error-border: #fecaca;
  
  --color-info: #1d4ed8;
  --color-info-bg: #eff6ff;
  --color-info-border: #bfdbfe;

  /* Typography */
  --font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  
  --font-size-xs: 0.75rem;     /* 12px */
  --font-size-sm: 0.875rem;    /* 14px */
  --font-size-base: 1rem;      /* 16px */
  --font-size-lg: 1.125rem;    /* 18px */
  --font-size-xl: 1.25rem;     /* 20px */
  --font-size-2xl: 1.5rem;     /* 24px */
  --font-size-3xl: 1.875rem;   /* 30px */
  --font-size-4xl: 2.25rem;    /* 36px */
  --font-size-5xl: 2.875rem;   /* 46px */

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;

  --line-height-tight: 1.25;
  --line-height-snug: 1.375;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.65;

  /* Layout Containers */
  --container-max-width: 1200px;
  --container-narrow-width: 820px;
  --container-wide-width: 1280px;
  --container-tool-width: 900px;
  --container-padding: 1.25rem;

  /* Spacing Scale */
  --space-0-5: 0.125rem; /* 2px */
  --space-1: 0.25rem;    /* 4px */
  --space-2: 0.5rem;     /* 8px */
  --space-3: 0.75rem;    /* 12px */
  --space-4: 1rem;       /* 16px */
  --space-5: 1.25rem;    /* 20px */
  --space-6: 1.5rem;     /* 24px */
  --space-8: 2rem;       /* 32px */
  --space-10: 2.5rem;    /* 40px */
  --space-12: 3rem;      /* 48px */
  --space-16: 4rem;      /* 64px */
  --space-20: 5rem;      /* 80px */

  /* Border Radii */
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Elevation & Shadows */
  --shadow-xs: 0 1px 2px 0 rgb(15 23 42 / 0.05);
  --shadow-sm: 0 1px 3px 0 rgb(15 23 42 / 0.08), 0 1px 2px -1px rgb(15 23 42 / 0.04);
  --shadow-md: 0 4px 6px -1px rgb(15 23 42 / 0.08), 0 2px 4px -2px rgb(15 23 42 / 0.04);
  --shadow-lg: 0 10px 15px -3px rgb(15 23 42 / 0.08), 0 4px 6px -4px rgb(15 23 42 / 0.04);
  --shadow-xl: 0 20px 25px -5px rgb(15 23 42 / 0.08), 0 8px 10px -6px rgb(15 23 42 / 0.04);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Header Height */
  --header-height: 72px;
}

/* ---- reset.css ---- */
/**
 * Serge3DX Modern Reset
 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  tab-size: 4;
  scroll-behavior: smooth;
}

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

body {
  min-height: 100vh;
  line-height: var(--line-height-relaxed);
  text-rendering: optimizeSpeed;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

ul, ol {
  list-style: none;
}

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

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

input, button, textarea, select {
  font: inherit;
  color: inherit;
  border: none;
  background: none;
}

button {
  cursor: pointer;
}

table {
  border-collapse: collapse;
  border-spacing: 0;
  width: 100%;
}

fieldset {
  border: none;
}

/* ---- base.css ---- */
/**
 * Serge3DX Base Styles & Typography
 */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-text);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2rem, 4vw + 1rem, var(--font-size-5xl));
  font-weight: var(--font-weight-extrabold);
  line-height: 1.15;
}

h2 {
  font-size: clamp(1.5rem, 2.5vw + 0.5rem, var(--font-size-3xl));
  margin-top: var(--space-8);
}

h3 {
  font-size: clamp(1.25rem, 1.5vw + 0.25rem, var(--font-size-2xl));
  margin-top: var(--space-6);
}

h4 {
  font-size: var(--font-size-xl);
}

p {
  margin-bottom: var(--space-4);
  color: var(--color-text-secondary);
}

p.lead {
  font-size: var(--font-size-lg);
  line-height: var(--line-height-relaxed);
  color: var(--color-text);
}

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

a:hover {
  color: var(--color-primary-hover);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

em, i {
  font-style: italic;
}

small {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

hr {
  border: 0;
  border-top: 1px solid var(--color-border);
  margin: var(--space-8) 0;
}

blockquote {
  border-left: 4px solid var(--color-primary);
  padding: var(--space-3) var(--space-5);
  margin: var(--space-6) 0;
  background-color: var(--color-primary-subtle);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-style: italic;
  color: var(--color-text-secondary);
}

code, kbd, samp {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background-color: var(--color-surface-subtle);
  border: 1px solid var(--color-border);
  padding: 0.15em 0.4em;
  border-radius: var(--radius-xs);
  color: var(--color-primary);
}

pre {
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  background-color: #0f172a;
  color: #f8fafc;
  padding: var(--space-4);
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin: var(--space-6) 0;
}

pre code {
  background: transparent;
  border: none;
  padding: 0;
  color: inherit;
}

/* Base Tables */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: var(--space-6) 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

table {
  width: 100%;
  text-align: left;
  background-color: var(--color-surface);
}

th, td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

th {
  background-color: var(--color-surface-subtle);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

tr:last-child td {
  border-bottom: none;
}

tbody tr:hover {
  background-color: var(--color-surface-subtle);
}

/* ---- layout.css ---- */
/**
 * Serge3DX Layout Styles
 */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.container-narrow {
  width: 100%;
  max-width: var(--container-narrow-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.container-wide {
  width: 100%;
  max-width: var(--container-wide-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.container-tool {
  width: 100%;
  max-width: var(--container-tool-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

/* Site Shell */
.site-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.site-main {
  flex: 1 0 auto;
  padding-top: var(--space-8);
  padding-bottom: var(--space-16);
}

/* Section Spacing */
.section {
  padding-top: var(--space-12);
  padding-bottom: var(--space-12);
}

.section-lg {
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}

.section-subtle {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: var(--space-10);
}

.section-header .section-tag {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  background-color: var(--color-primary-light);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-3);
}

.section-header h2 {
  margin-top: 0;
  margin-bottom: var(--space-3);
}

.section-header p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-lg);
  margin-bottom: 0;
}

/* Grid Layouts */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

/* Page with Sidebar */
.layout-with-sidebar {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: var(--space-10);
  align-items: start;
}

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

.sidebar-column {
  position: sticky;
  top: calc(var(--header-height) + var(--space-6));
}

/* Hero Section */
.hero-section {
  padding-top: var(--space-12);
  padding-bottom: var(--space-16);
  background: radial-gradient(circle at 75% 20%, var(--color-primary-subtle) 0%, var(--color-bg) 65%);
  border-bottom: 1px solid var(--color-border);
}

.hero-grid-layout {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: var(--space-10);
  align-items: center;
}

.hero-text-col {
  text-align: left;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  background-color: var(--color-surface);
  border: 1px solid var(--color-primary-light);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
  box-shadow: var(--shadow-xs);
}

.hero-title {
  font-size: clamp(2.25rem, 4.5vw, var(--font-size-5xl));
  font-weight: var(--font-weight-extrabold);
  letter-spacing: -0.03em;
  line-height: 1.12;
  margin-bottom: var(--space-5);
  color: var(--color-text);
}

.hero-subtitle {
  font-size: clamp(1.05rem, 1.8vw, var(--font-size-lg));
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-6);
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-6);
}

.hero-trust-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-text-secondary);
  list-style: none;
  padding: 0;
  margin: 0;
}

.hero-trust-item {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.hero-trust-item span.icon-check {
  color: #16a34a;
  font-weight: bold;
}

/* Hero Visual Mockup Card */
.hero-visual-col {
  display: flex;
  justify-content: center;
}

.hero-mockup-card {
  width: 100%;
  max-width: 440px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  padding: var(--space-6);
  position: relative;
  overflow: hidden;
}

.hero-mockup-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), #06b6d4, #10b981);
}

.mockup-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border);
}

.mockup-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: #15803d;
  background-color: #dcfce7;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
}

.mockup-score-circle {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--color-surface) 60%, var(--color-primary-subtle) 100%);
  border: 4px solid var(--color-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-4) auto;
  box-shadow: 0 4px 14px rgba(67, 56, 202, 0.15);
}

.mockup-score-val {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
}

.mockup-score-lbl {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
  font-weight: 700;
  margin-top: 2px;
}

.mockup-metric-row {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.mockup-metric-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.mockup-metric-labels {
  display: flex;
  justify-content: space-between;
  font-size: var(--font-size-xs);
  font-weight: 600;
}

.mockup-metric-bar {
  width: 100%;
  height: 6px;
  background-color: var(--color-surface-subtle);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.mockup-metric-fill {
  height: 100%;
  border-radius: var(--radius-full);
  background: linear-gradient(90deg, var(--color-primary), #0284c7);
}

.mockup-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
}

@media (max-width: 900px) {
  .hero-grid-layout {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-text-col {
    text-align: center;
  }
  .hero-actions {
    justify-content: center;
  }
  .hero-trust-list {
    justify-content: center;
  }
}

/* ---- components.css ---- */
/**
 * Serge3DX Reusable UI Components
 */

/* =========================================
   Buttons
   ========================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-base);
  line-height: 1;
  padding: 0.75rem 1.35rem;
  border-radius: var(--radius-md);
  text-decoration: none !important;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
}

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

.btn-primary {
  background-color: var(--color-primary);
  color: #ffffff !important;
  box-shadow: 0 1px 2px 0 rgb(67 56 202 / 0.2);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  color: #ffffff !important;
  box-shadow: 0 4px 6px -1px rgb(67 56 202 / 0.25);
}

.btn-secondary {
  background-color: var(--color-surface);
  color: var(--color-text) !important;
  border-color: var(--color-border);
  box-shadow: var(--shadow-xs);
}

.btn-secondary:hover {
  background-color: var(--color-surface-subtle);
  border-color: var(--color-border-subtle);
}

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

.btn-outline:hover {
  background-color: var(--color-primary-subtle);
}

.btn-sm {
  padding: 0.5rem 0.85rem;
  font-size: var(--font-size-sm);
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 0.95rem 1.75rem;
  font-size: var(--font-size-lg);
  border-radius: var(--radius-lg);
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-md);
}

/* =========================================
   Badges
   ========================================= */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 0.2rem 0.55rem;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-full);
  line-height: 1.2;
}

.badge-primary {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

.badge-secondary {
  background-color: var(--color-secondary-light);
  color: var(--color-secondary);
}

.badge-success {
  background-color: var(--color-success-bg);
  color: var(--color-success);
  border: 1px solid var(--color-success-border);
}

.badge-warning {
  background-color: var(--color-warning-bg);
  color: var(--color-warning);
  border: 1px solid var(--color-warning-border);
}

/* =========================================
   Header & Navigation
   ========================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
  display: flex;
  align-items: center;
}

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

.site-branding {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.site-logo {
  display: inline-flex;
  align-items: center;
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-extrabold);
  color: var(--color-text);
  letter-spacing: -0.03em;
  text-decoration: none !important;
}

.site-logo .logo-accent {
  color: var(--color-primary);
  margin-left: 2px;
}

.site-logo .logo-tag {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-xs);
  margin-left: var(--space-2);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.site-tagline {
  display: none;
}

/* Desktop Navigation */
.desktop-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.desktop-nav .menu-item {
  position: relative;
}

.desktop-nav .menu-item a {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 0.5rem 0.75rem;
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.desktop-nav .menu-item a:hover,
.desktop-nav .menu-item.current-menu-item > a {
  color: var(--color-primary);
  background-color: var(--color-primary-subtle);
  text-decoration: none;
}

/* Sub-Menu Dropdown Styling */
.desktop-nav .sub-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 250px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.12), 0 8px 10px -6px rgba(15, 23, 42, 0.08);
  padding: 0.5rem 0;
  margin: 0.35rem 0 0 0;
  list-style: none;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
  display: flex;
  flex-direction: column;
}

.desktop-nav .menu-item:hover > .sub-menu,
.desktop-nav .menu-item:focus-within > .sub-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.desktop-nav .sub-menu .menu-item {
  width: 100%;
  position: relative;
}

.desktop-nav .sub-menu .menu-item a {
  display: block;
  width: 100%;
  padding: 0.6rem 1.15rem;
  color: var(--color-text);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-normal);
  border-radius: 0;
  white-space: nowrap;
  background: transparent;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.desktop-nav .sub-menu .menu-item a:hover,
.desktop-nav .sub-menu .menu-item.current-menu-item > a {
  background-color: var(--color-primary-subtle);
  color: var(--color-primary);
}

/* Caret indicator for menu items with sub-menus */
.desktop-nav .menu-item-has-children > a::after {
  content: "";
  display: inline-block;
  margin-left: 0.35rem;
  vertical-align: middle;
  border-top: 4px solid currentColor;
  border-right: 4px solid transparent;
  border-left: 4px solid transparent;
  transition: transform var(--transition-fast);
}

.desktop-nav .menu-item-has-children:hover > a::after {
  transform: rotate(180deg);
}

/* Mobile Nav Drawer Submenu Support */
.mobile-nav-list .sub-menu {
  list-style: none;
  padding-left: 1.25rem;
  margin: 0.25rem 0 0.5rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.mobile-nav-list .sub-menu a {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  padding: 0.35rem 0.5rem;
  display: block;
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.header-search-btn {
  background: transparent;
  color: var(--color-text-secondary);
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: color var(--transition-fast);
}

.header-search-btn:hover {
  color: var(--color-primary);
  background-color: var(--color-surface-subtle);
}

.mobile-menu-toggle {
  display: none;
  background: transparent;
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  color: var(--color-text);
}

/* Mobile Drawer */
.mobile-nav-drawer {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  z-index: 200;
  visibility: hidden;
  opacity: 0;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.mobile-nav-drawer.is-open {
  visibility: visible;
  opacity: 1;
}

.mobile-nav-backdrop {
  position: absolute;
  inset: 0;
  background-color: rgba(15, 23, 42, 0.45);
}

.mobile-nav-panel {
  position: absolute;
  top: 0;
  right: 0;
  width: min(85vw, 360px);
  height: 100%;
  background-color: var(--color-surface);
  box-shadow: var(--shadow-xl);
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform var(--transition-normal);
}

.mobile-nav-drawer.is-open .mobile-nav-panel {
  transform: translateX(0);
}

.mobile-nav-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
}

.mobile-nav-close {
  padding: var(--space-2);
  color: var(--color-text-secondary);
}

.mobile-nav-content {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-5);
}

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

.mobile-nav-list a {
  display: block;
  padding: var(--space-3) var(--space-4);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-base);
  color: var(--color-text);
  border-radius: var(--radius-md);
  text-decoration: none;
}

.mobile-nav-list a:hover {
  background-color: var(--color-primary-subtle);
  color: var(--color-primary);
}

/* =========================================
   Breadcrumbs
   ========================================= */
.breadcrumbs {
  margin-bottom: var(--space-6);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
}

.breadcrumbs li {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.breadcrumbs a {
  color: var(--color-text-muted);
  text-decoration: none;
}

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

.breadcrumbs .breadcrumb-separator {
  color: var(--color-text-subtle);
  user-select: none;
}

.breadcrumbs .breadcrumb-current {
  color: var(--color-text);
  font-weight: var(--font-weight-medium);
}

/* =========================================
   Cards
   ========================================= */
.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-xs);
  transition: all var(--transition-fast);
}

.card-interactive:hover {
  border-color: var(--color-border-subtle);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

/* Category Cards */
.category-card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-decoration: none !important;
  transition: all var(--transition-fast);
  position: relative;
}

.category-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.category-card-icon {
  width: 48px;
  height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.category-card h3 {
  font-size: var(--font-size-xl);
  margin-top: 0;
  margin-bottom: var(--space-2);
  color: var(--color-text);
}

.category-card p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
  flex-grow: 1;
}

.category-card-link {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

/* Step Card (How It Works) */
.step-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  position: relative;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background-color: var(--color-primary);
  color: #ffffff;
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-4);
}

.step-card h3 {
  margin-top: 0;
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-2);
}

.step-card p {
  font-size: var(--font-size-sm);
  margin-bottom: 0;
  color: var(--color-text-secondary);
}

/* =========================================
   Trust & Disclaimer Callout
   ========================================= */
.trust-banner {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-secondary);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  margin: var(--space-8) 0;
}

.trust-banner h3 {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: 0;
  font-size: var(--font-size-lg);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.trust-banner p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

.relationship-disclaimer {
  background-color: var(--color-warning-bg);
  border: 1px solid var(--color-warning-border);
  border-left: 4px solid var(--color-warning);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
  font-size: var(--font-size-sm);
  color: var(--color-warning);
  margin: var(--space-6) 0;
}

.relationship-disclaimer strong {
  color: #78350f;
}

/* =========================================
   FAQ Component (Accordion)
   ========================================= */
.faq-section {
  margin: var(--space-10) 0;
}

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

.faq-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item[open] {
  border-color: var(--color-border-subtle);
  box-shadow: var(--shadow-xs);
}

.faq-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-base);
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
  user-select: none;
}

.faq-summary::-webkit-details-marker {
  display: none;
}

.faq-icon {
  transition: transform var(--transition-normal);
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.faq-item[open] .faq-icon {
  transform: rotate(180deg);
}

.faq-content {
  padding: 0 var(--space-5) var(--space-5);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
  border-top: 1px solid transparent;
}

.faq-item[open] .faq-content {
  border-top-color: var(--color-border);
  padding-top: var(--space-4);
}

/* =========================================
   Footer
   ========================================= */
.site-footer {
  background-color: #ffffff;
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-16);
  padding-bottom: var(--space-10);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

.footer-col h4 {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text);
  margin-top: 0;
  margin-bottom: var(--space-4);
}

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

.footer-menu a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.footer-brand p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  margin-top: var(--space-3);
  max-width: 320px;
}

.footer-bottom {
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.footer-disclaimer-note {
  font-size: var(--font-size-xs);
  color: var(--color-text-subtle);
  line-height: 1.6;
}

.footer-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  font-size: var(--font-size-xs);
}

/* =========================================
   Search Modal / Bar
   ========================================= */
.search-modal {
  position: fixed;
  inset: 0;
  z-index: 300;
  background-color: rgba(15, 23, 42, 0.5);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 15vh;
  visibility: hidden;
  opacity: 0;
  transition: all var(--transition-fast);
}

.search-modal.is-open {
  visibility: visible;
  opacity: 1;
}

.search-modal-card {
  width: min(92vw, 600px);
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.search-modal-form {
  display: flex;
  align-items: center;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
  gap: var(--space-3);
}

.search-modal-input {
  flex: 1;
  font-size: var(--font-size-lg);
  color: var(--color-text);
  outline: none;
}

.search-modal-close {
  color: var(--color-text-muted);
  padding: var(--space-1);
}

/* ---- tools.css ---- */
/**
 * Serge3DX Tool Architecture & Component Styles
 */

/* =========================================
   Tool Cards & Grid
   ========================================= */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr));
  gap: var(--space-6);
}

.tool-card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-decoration: none !important;
  transition: all var(--transition-fast);
  position: relative;
  height: 100%;
}

.tool-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.tool-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.tool-card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background-color: var(--color-primary-subtle);
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.tool-card-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  margin-top: 0;
  margin-bottom: var(--space-2);
  line-height: var(--line-height-snug);
}

.tool-card-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-5);
  flex-grow: 1;
}

.tool-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.tool-card-action {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

.tool-card:hover .tool-card-action {
  color: var(--color-primary-hover);
}

/* =========================================
   Single Tool Workbench Layout
   ========================================= */
.tool-page-header {
  margin-bottom: var(--space-8);
  text-align: left;
}

.tool-page-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  flex-wrap: wrap;
}

.tool-workbench {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: clamp(1.5rem, 3vw, 2.5rem);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--space-10);
  position: relative;
}

.tool-workbench-title {
  font-size: var(--font-size-2xl);
  margin-top: 0;
  margin-bottom: var(--space-2);
}

.tool-workbench-intro {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

/* =========================================
   Tool Form Inputs
   ========================================= */
.tool-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.tool-form-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.tool-form-section-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  margin-top: 0;
  margin-bottom: var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

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

.input-label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
}

.input-help {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.input-field {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: var(--font-size-base);
  color: var(--color-text);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.input-field:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.input-field.has-error {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px var(--color-error-bg);
}

.input-error-msg {
  font-size: var(--font-size-xs);
  color: var(--color-error);
  font-weight: var(--font-weight-medium);
  display: none;
}

.input-error-msg.is-visible {
  display: block;
}

/* Slider Controls */
.slider-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.slider-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.slider-value-badge {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  background-color: var(--color-primary-subtle);
  padding: 0.15rem 0.6rem;
  border-radius: var(--radius-full);
}

.tool-range-slider {
  width: 100%;
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--color-surface-subtle);
  outline: none;
  accent-color: var(--color-primary);
  cursor: pointer;
}

/* Radio Tiles / Option Cards */
.option-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-3);
}

.option-tile {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: var(--space-4);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.option-tile:hover {
  border-color: var(--color-primary-light);
  background-color: var(--color-primary-subtle);
}

.option-tile input[type="radio"],
.option-tile input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.option-tile.is-selected {
  border-color: var(--color-primary);
  background-color: var(--color-primary-subtle);
  box-shadow: 0 0 0 1px var(--color-primary);
}

.option-tile-title {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.option-tile-desc {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
}

/* Tool Actions Row */
.tool-actions-row {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
  flex-wrap: wrap;
}

/* =========================================
   Tool Result Area (Accessible & Polished)
   ========================================= */
.tool-result-container {
  display: none;
  margin-top: var(--space-8);
  padding-top: var(--space-8);
  border-top: 2px dashed var(--color-border);
}

.tool-result-container.is-active {
  display: block;
  animation: fadeIn 300ms ease-out forwards;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.result-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.result-header-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.result-score-wrap {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.result-score-circle {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-full);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background-color: var(--color-primary-subtle);
  border: 3px solid var(--color-primary);
  color: var(--color-primary);
  font-weight: var(--font-weight-extrabold);
  font-size: var(--font-size-2xl);
  line-height: 1;
}

.result-score-circle small {
  font-size: 0.65rem;
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
}

.result-heading-wrap h4 {
  font-size: var(--font-size-xl);
  margin-top: 0;
  margin-bottom: var(--space-1);
}

.result-tagline {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin: 0;
}

/* Result Breakdown Bars */
.result-breakdown-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.breakdown-row {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.breakdown-labels {
  display: flex;
  justify-content: space-between;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
}

.breakdown-bar-bg {
  width: 100%;
  height: 8px;
  background-color: var(--color-surface-subtle);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.breakdown-bar-fill {
  height: 100%;
  background-color: var(--color-primary);
  border-radius: var(--radius-full);
  transition: width 600ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Result Actions & Utility Buttons */
.result-utilities {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

/* Result Script / Generated Text Box */
.result-script-box {
  background-color: var(--color-surface-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
  color: var(--color-text);
  white-space: pre-wrap;
  position: relative;
}

/* Print Styles */
@media print {
  .site-header,
  .site-footer,
  .tool-actions-row,
  .result-utilities,
  .breadcrumbs,
  .related-tools-section,
  .faq-section {
    display: none !important;
  }

  body {
    background: #ffffff !important;
    color: #000000 !important;
  }

  .tool-workbench {
    border: none !important;
    box-shadow: none !important;
    padding: 0 !important;
  }

  .tool-result-container {
    display: block !important;
  }
}

/* ---- blog.css ---- */
/**
 * Serge3DX Blog & Editorial Styles
 */

/* =========================================
   Post Grid & Post Card
   ========================================= */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-8);
}

.post-card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xs);
  transition: all var(--transition-fast);
  height: 100%;
}

.post-card:hover {
  border-color: var(--color-border-subtle);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.post-card-thumb-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background-color: var(--color-surface-subtle);
  overflow: hidden;
}

.post-card-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.post-card:hover .post-card-thumb {
  transform: scale(1.03);
}

/* Fallback Visual Banners */
.post-card-fallback-banner {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #eef2ff 0%, #e0e7ff 50%, #f0fdf4 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-border);
}

.post-card-fallback-banner .fallback-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
  color: var(--color-primary);
}

.post-card-fallback-banner .fallback-tag {
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
}

.article-featured-fallback-banner {
  width: 100%;
  aspect-ratio: 21 / 9;
  min-height: 220px;
  background: linear-gradient(135deg, #eef2ff 0%, #ede9fe 50%, #f0fdf4 100%);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
  box-shadow: var(--shadow-xs);
}

.article-fallback-icon {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-full);
  background: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.article-fallback-text {
  font-size: var(--font-size-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-secondary);
}

.post-card-body {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.post-card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
  flex-wrap: wrap;
}

.post-card-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-snug);
  margin-top: 0;
  margin-bottom: var(--space-3);
}

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

.post-card-title a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.post-card-excerpt {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-5);
  flex-grow: 1;
}

.post-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* =========================================
   Single Article Layout
   ========================================= */
.single-article {
  max-width: var(--container-narrow-width);
  margin-left: auto;
  margin-right: auto;
}

.article-header {
  margin-bottom: var(--space-8);
}

.article-title {
  font-size: clamp(2rem, 3.5vw + 0.5rem, var(--font-size-4xl));
  margin-top: var(--space-3);
  margin-bottom: var(--space-4);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-border);
  flex-wrap: wrap;
}

.article-featured-image {
  margin: var(--space-8) 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

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

.article-content {
  font-size: var(--font-size-lg);
  line-height: 1.8;
  color: var(--color-text-secondary);
}

.article-content p {
  margin-bottom: var(--space-6);
}

.article-content h2 {
  margin-top: var(--space-10);
  margin-bottom: var(--space-4);
}

.article-content h3 {
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
}

.article-content ul,
.article-content ol {
  margin: var(--space-6) 0;
  padding-left: var(--space-6);
}

.article-content ul {
  list-style: disc;
}

.article-content ol {
  list-style: decimal;
}

.article-content li {
  margin-bottom: var(--space-2);
}

/* Author Box */
.author-bio-card {
  display: flex;
  align-items: flex-start;
  gap: var(--space-5);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin: var(--space-10) 0;
}

.author-bio-avatar {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  object-fit: cover;
  flex-shrink: 0;
}

.author-bio-name {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  margin-top: 0;
  margin-bottom: var(--space-1);
}

.author-bio-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

/* Comments Area */
.comments-area {
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
}

.comment-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  margin: var(--space-6) 0;
}

.comment-body {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
}

.comment-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-3);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* ---- forms.css ---- */
/**
 * Serge3DX Forms & Form Controls
 */
.form-group {
  margin-bottom: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.form-label .required {
  color: var(--color-error);
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: var(--font-size-base);
  color: var(--color-text);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

textarea.form-control {
  min-height: 120px;
  resize: vertical;
}

.form-hint {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* Contact Form Specifics */
.contact-form-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: clamp(1.5rem, 3vw, 2.5rem);
  box-shadow: var(--shadow-sm);
}

/* Newsletter Inline Form */
.newsletter-card {
  background: linear-gradient(135deg, var(--color-primary-subtle) 0%, #ffffff 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  text-align: center;
  margin: var(--space-12) 0;
}

.newsletter-form-inline {
  display: flex;
  max-width: 480px;
  margin: var(--space-6) auto 0;
  gap: var(--space-2);
}

.newsletter-form-inline input {
  flex: 1;
  background-color: #ffffff;
}

/* WordPress Default Search Form */
.search-form {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.search-form label {
  flex: 1;
}

.search-form .search-field {
  width: 100%;
  padding: 0.65rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  font-size: var(--font-size-sm);
}

.search-form .search-field:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

/* ---- accessibility.css ---- */
/**
 * Serge3DX Accessibility Styles (WCAG AA Compliant)
 */

/* Skip to Content Link */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-4);
  background-color: var(--color-primary);
  color: #ffffff !important;
  padding: var(--space-3) var(--space-5);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-md);
  z-index: 9999;
  text-decoration: none;
  box-shadow: var(--shadow-lg);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-4);
  outline: 3px solid #ffffff;
  outline-offset: 2px;
}

/* Screen Reader Text (WordPress Standard) */
.screen-reader-text {
  border: 0;
  clip: rect(1px, 1px, 1px, 1px);
  clip-path: inset(50%);
  height: 1px;
  margin: -1px;
  overflow: hidden;
  padding: 0;
  position: absolute !important;
  width: 1px;
  word-wrap: normal !important;
}

.screen-reader-text:focus {
  background-color: var(--color-surface);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  clip: auto !important;
  clip-path: none;
  color: var(--color-primary);
  display: block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  height: auto;
  left: var(--space-2);
  top: var(--space-2);
  line-height: normal;
  padding: var(--space-3) var(--space-4);
  text-decoration: none;
  width: auto;
  z-index: 100000;
}

/* Visible Focus Indicator */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Reduced Motion */
@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;
  }
}

/* ---- responsive.css ---- */
/**
 * Serge3DX Responsive Breakpoints & Mobile Optimization
 *
 * Ensures flawless alignment, fluid typography, touch-friendly tap targets,
 * responsive table scrolling, and smooth drawer navigation across mobile,
 * tablet, laptop, and desktop viewports.
 */

/* ========================================================
   1. Large Tablets & Small Laptops (max-width: 1024px)
   ======================================================== */
@media (max-width: 1024px) {
  /* Header & Navigation: Switch to Mobile Drawer cleanly */
  .desktop-nav {
    display: none !important;
  }

  .mobile-menu-toggle {
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
  }

  .header-actions .btn {
    display: none;
  }

  .header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  /* Two Column Layouts */
  .layout-with-sidebar {
    grid-template-columns: 1fr;
  }

  .sidebar-column {
    position: static;
    margin-top: var(--space-8);
  }

  .hero-grid-layout {
    grid-template-columns: 1fr;
    gap: var(--space-8);
    text-align: center;
  }

  .hero-text-col {
    text-align: center;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-trust-list {
    justify-content: center;
  }

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ========================================================
   2. Tablets & Mobile Landscape (max-width: 768px)
   ======================================================== */
@media (max-width: 768px) {
  :root {
    --header-height: 60px;
    --container-padding: 1.25rem;
  }

  /* Grids collapse to single-column */
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }

  .tools-grid {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }

  .posts-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  /* Hero Section */
  .hero-section {
    padding-top: var(--space-8);
    padding-bottom: var(--space-10);
  }

  .hero-title {
    font-size: clamp(2rem, 6vw, 2.5rem);
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
  }

  /* Tool Workbench & Actions */
  .tool-workbench {
    padding: var(--space-5);
    border-radius: var(--radius-lg);
  }

  .tool-actions-row {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-3);
  }

  .tool-actions-row .btn {
    width: 100%;
  }

  /* Quick Jump Navigation */
  .tool-toc-nav {
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 0.5rem;
  }

  .tool-toc-nav a {
    flex-shrink: 0;
  }

  /* Tables: Horizontal Touch Scroll */
  .table-responsive {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    display: block;
    margin-bottom: var(--space-6);
  }

  .table-responsive table {
    min-width: 540px;
  }

  /* Result Card Centering */
  .result-score-wrap {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--space-3);
  }

  .result-heading-wrap {
    text-align: center;
  }

  .result-utilities {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-3);
  }

  .result-utilities .btn {
    width: 100%;
  }

  /* Author Review Cards */
  .author-review-card {
    flex-direction: column;
    text-align: center;
    gap: var(--space-3);
  }

  .author-bio-card {
    flex-direction: column;
    text-align: center;
    gap: var(--space-3);
  }

  /* Footer Layout */
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
  }

  .footer-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }

  /* Newsletter Form */
  .newsletter-form-inline {
    flex-direction: column;
  }

  .newsletter-form-inline .btn {
    width: 100%;
  }
}

/* ========================================================
   3. Small Mobile Phones (max-width: 480px)
   ======================================================== */
@media (max-width: 480px) {
  :root {
    --container-padding: 1rem;
  }

  .site-logo {
    font-size: var(--font-size-xl);
  }

  .site-logo .logo-tag {
    font-size: 0.65rem;
    padding: 0.1rem 0.35rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

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

  .hero-mockup-card {
    padding: var(--space-4);
  }

  .hero-title {
    font-size: 1.85rem;
  }

  .tool-workbench {
    padding: var(--space-4);
  }

  .result-card {
    padding: var(--space-4);
  }

  .slider-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }

  .slider-value-badge {
    align-self: flex-start;
  }
}

/* ---- extra-fixes.css ---- */
/* Fix: Ensure tool-card links are properly colored and whole card is clickable area visually */
.tool-card a {
  text-decoration: none;
  color: inherit;
}
.tool-card-title a {
  color: var(--color-text);
}
.tool-card-title a:hover {
  color: var(--color-primary);
}
/* Fix: Ensure blog secondary button visible on mobile */
@media (max-width: 1024px) {
  .header-actions .btn.btn-primary {
    display: none !important;
  }
  .header-actions .mobile-menu-toggle {
    display: inline-flex !important;
  }
}
/* Fix: Proper container padding so nothing bleeds on small screens */
@media (max-width: 640px) {
  .container,
  .container-narrow,
  .container-tool,
  .container-wide {
    padding-left: 1rem;
    padding-right: 1rem;
  }
  .section {
    padding-top: 3rem;
    padding-bottom: 3rem;
  }
  .hero-section {
    padding-top: 2.5rem;
    padding-bottom: 3rem;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}
/* Fix: Make tool-card badges row wrap cleanly */
.tool-card-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
}
/* Fix: Post card fallback banner styling */
.post-card-fallback-banner {
  width: 100%;
  height: 200px;
  background: linear-gradient(135deg, var(--color-primary-subtle) 0%, var(--color-secondary-light) 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}
.fallback-icon-wrap {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background-color: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}
.fallback-tag {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  background-color: var(--color-surface);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
}
/* Fix: Ensure post-card-thumb-wrap has proper height */
.post-card-thumb-wrap {
  overflow: hidden;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  flex-shrink: 0;
}
.post-card-thumb {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
}
/* Fix: Archive tool category label full-width on narrow view */
@media (max-width: 480px) {
  .tool-page-meta {
    flex-direction: column;
    align-items: flex-start;
  }
  .tool-toc-nav {
    overflow-x: auto;
  }
}
/* Fix: is-scrolled state for sticky header */
.site-header.is-scrolled {
  box-shadow: var(--shadow-md);
}
/* Fix: Proper footer link text wrapping */
.footer-menu a {
  word-break: break-word;
}
/* Fix: Consistent gap in mobile-nav-list items */
.mobile-nav-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
/* Fix: author/review card flex at mobile */
.author-review-card,
.author-bio-card {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}
@media (max-width: 600px) {
  .author-review-card,
  .author-bio-card {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
}

/* Fix: Category Switcher & Archive Navigation */
.category-switcher {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}
.category-switcher .btn {
  white-space: nowrap;
  font-size: var(--font-size-xs);
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-full);
}
@media (max-width: 640px) {
  .category-switcher {
    gap: 0.35rem;
  }
  .category-switcher .btn {
    font-size: 0.8rem;
    padding: 0.35rem 0.7rem;
  }
  .tools-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
  .tool-card {
    padding: 1.25rem;
  }
  .section-subtle {
    padding: 1.5rem 1rem !important;
  }
}