/*
Theme Name: QWE AI Education
Theme URI: https://www.qwe.edu.pl
Author: QWE Education Team
Author URI: https://www.qwe.edu.pl
Description: A modern WordPress theme for online AI education platform. Free tutorials on ChatGPT, AI art, AI coding, and more. No registration required. Built for teaching people how to use AI tools effectively.
Version: 1.1.0
Requires at least: 6.0
Tested up to: 6.7
Requires PHP: 8.0
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: qwe-developer-flavor
Domain Path: /languages
Tags: education, e-learning, ai, courses, custom-menu, featured-images, translation-ready

QWE AI Education WordPress Theme
Copyright (C) 2026 QWE Education Team
*/

/* ==========================================================================
   CSS Variables & Design Tokens
   ========================================================================== */

:root {
    /* Primary Colors */
    --color-primary: #6366F1;
    --color-primary-light: #A5B4FC;
    --color-primary-dark: #4338CA;

    /* Secondary Colors */
    --color-secondary: #06B6D4;
    --color-secondary-light: #67E8F9;
    --color-secondary-dark: #0891B2;

    /* Accent */
    --color-accent: #F59E0B;
    --color-accent-light: #FCD34D;

    /* Neutrals */
    --color-bg: #F8FAFC;
    --color-surface: #FFFFFF;
    --color-text: #0F172A;
    --color-text-secondary: #475569;
    --color-text-muted: #94A3B8;
    --color-border: #E2E8F0;

    /* Dark surfaces */
    --color-dark: #0F172A;
    --color-dark-surface: #1E293B;

    /* Success / Error */
    --color-success: #10B981;
    --color-error: #EF4444;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #6366F1 0%, #8B5CF6 50%, #06B6D4 100%);
    --gradient-dark: linear-gradient(135deg, #0F172A 0%, #1E293B 50%, #0F172A 100%);
    --gradient-text: linear-gradient(135deg, #6366F1, #06B6D4);

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-heading: 'Plus Jakarta Sans', var(--font-sans);
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Font Sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3.25rem;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 12px -2px rgba(0, 0, 0, 0.12), 0 2px 4px -2px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 24px -4px rgba(0, 0, 0, 0.15), 0 4px 8px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 24px 48px -8px rgba(0, 0, 0, 0.18), 0 8px 16px -6px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.15), 0 0 40px rgba(99, 102, 241, 0.05);
    --shadow-glow-lg: 0 0 30px rgba(99, 102, 241, 0.25), 0 0 60px rgba(99, 102, 241, 0.08);

    /* Container */
    --container-max: 1280px;
    --container-padding: var(--space-4);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

/* ==========================================================================
   Reset & Base
   ========================================================================== */

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

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

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

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

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.3;
    color: var(--color-text);
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

/* ==========================================================================
   Layout
   ========================================================================== */

.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.site-content {
    min-height: 60vh;
}

/* ==========================================================================
   Header
   ========================================================================== */

.site-header {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(99, 102, 241, 0.08);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    transition: all var(--transition-base);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

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

.site-branding .site-title {
    font-size: var(--text-xl);
    font-weight: 800;
    margin: 0;
}

.site-branding .site-title a {
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: var(--space-2);
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.site-branding .site-title a:hover {
    opacity: 0.8;
}

/* Navigation */
.main-navigation ul {
    display: flex;
    list-style: none;
    gap: var(--space-1);
}

.main-navigation a {
    display: block;
    padding: var(--space-2) var(--space-4);
    color: var(--color-text-secondary);
    font-weight: 500;
    font-size: var(--text-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.main-navigation a:hover,
.main-navigation .current-menu-item > a,
.main-navigation .current-menu-ancestor > a {
    color: var(--color-primary);
    background: rgba(99, 102, 241, 0.06);
}

.main-navigation .current-menu-item > a,
.main-navigation .current-menu-ancestor > a {
    position: relative;
}

.main-navigation .current-menu-item > a::after,
.main-navigation .current-menu-ancestor > a::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
}

/* Dropdown parent hover */
.main-navigation .menu-item-has-children > a {
    position: relative;
}

/* Dropdown sub-menu */
.main-navigation .menu-item-has-children {
    position: relative;
}

.main-navigation .sub-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 220px;
    flex-direction: column;
    gap: 0;
    background: white;
    border: 1px solid rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--space-2);
    z-index: 100;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.main-navigation .menu-item-has-children:hover > .sub-menu {
    display: flex;
    opacity: 1;
    transform: translateY(0);
}

.main-navigation .sub-menu a {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-xs);
    font-weight: 400;
    white-space: nowrap;
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    background: transparent;
}

.main-navigation .sub-menu a::after,
.main-navigation .sub-menu .current-menu-item > a::after,
.main-navigation .sub-menu .current-menu-ancestor > a::after {
    display: none;
}

.main-navigation .sub-menu a:hover {
    color: var(--color-primary);
    background: rgba(99, 102, 241, 0.06);
}

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

/* Mobile menu toggle */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-2);
    color: var(--color-text);
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    font-weight: 600;
    line-height: 1;
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
    position: relative;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.45);
    transform: translateY(-1px);
    color: #fff;
}

.btn-secondary {
    background: transparent;
    color: var(--color-primary);
    border-color: rgba(99, 102, 241, 0.3);
}

.btn-secondary:hover {
    background: rgba(99, 102, 241, 0.06);
    border-color: var(--color-primary);
    color: var(--color-primary);
    box-shadow: var(--shadow-glow);
}

.btn-accent {
    background: linear-gradient(135deg, #F59E0B, #F97316);
    color: #fff;
    box-shadow: 0 2px 8px rgba(245, 158, 11, 0.3);
}

.btn-accent:hover {
    box-shadow: 0 4px 16px rgba(245, 158, 11, 0.45);
    transform: translateY(-1px);
    color: #fff;
}

.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-base);
    border-radius: var(--radius-xl);
    letter-spacing: 0.01em;
}

/* ==========================================================================
   Hero Section — Immersive Design
   ========================================================================== */

.hero-section {
    background: var(--color-dark);
    color: #fff;
    padding: var(--space-24) 0 var(--space-20);
    position: relative;
    overflow: hidden;
    min-height: 85vh;
    display: flex;
    align-items: center;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(99, 102, 241, 0.35), transparent),
        radial-gradient(ellipse 60% 40% at 85% 50%, rgba(6, 182, 212, 0.2), transparent),
        radial-gradient(ellipse 50% 60% at 5% 80%, rgba(139, 92, 246, 0.15), transparent);
}

.hero-section::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(99, 102, 241, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99, 102, 241, 0.04) 1px, transparent 1px);
    background-size: 60px 60px;
}

/* Floating particles */
.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.hero-particle {
    position: absolute;
    border-radius: 50%;
    background: rgba(99, 102, 241, 0.15);
    filter: blur(1px);
}

.hero-particle--1 {
    width: 6px;
    height: 6px;
    top: 15%;
    left: 10%;
    animation: particleFloat 6s ease-in-out infinite;
}

.hero-particle--2 {
    width: 4px;
    height: 4px;
    top: 25%;
    right: 15%;
    background: rgba(6, 182, 212, 0.2);
    animation: particleFloat 8s ease-in-out infinite 1s;
}

.hero-particle--3 {
    width: 8px;
    height: 8px;
    bottom: 30%;
    left: 20%;
    background: rgba(139, 92, 246, 0.12);
    animation: particleFloat 7s ease-in-out infinite 2s;
}

.hero-particle--4 {
    width: 5px;
    height: 5px;
    top: 60%;
    right: 25%;
    animation: particleFloat 9s ease-in-out infinite 0.5s;
}

.hero-particle--5 {
    width: 3px;
    height: 3px;
    bottom: 20%;
    right: 10%;
    background: rgba(6, 182, 212, 0.15);
    animation: particleFloat 5s ease-in-out infinite 3s;
}

@keyframes particleFloat {
    0%, 100% { transform: translate(0, 0) scale(1); opacity: 0.5; }
    25% { transform: translate(10px, -15px) scale(1.2); opacity: 0.8; }
    50% { transform: translate(-5px, -25px) scale(0.9); opacity: 0.6; }
    75% { transform: translate(15px, -10px) scale(1.1); opacity: 0.7; }
}

.hero-layout {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--space-12);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 640px;
}

.hero-content__badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: rgba(99, 102, 241, 0.15);
    border: 1px solid rgba(99, 102, 241, 0.3);
    color: var(--color-primary-light);
    font-size: var(--text-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-6);
    backdrop-filter: blur(8px);
}

.hero-content__badge-dot {
    width: 8px;
    height: 8px;
    background: #10B981;
    border-radius: 50%;
    animation: dotPulse 2s ease-in-out infinite;
}

@keyframes dotPulse {
    0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4); }
    50% { opacity: 0.8; box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
}

.hero-content h1 {
    font-size: var(--text-5xl);
    color: #fff;
    margin-bottom: var(--space-6);
    line-height: 1.08;
    letter-spacing: -0.03em;
}

.hero-content__desc {
    font-size: var(--text-lg);
    color: var(--color-text-muted);
    margin-bottom: var(--space-8);
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
    margin-bottom: var(--space-8);
}

.btn-glow {
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3), 0 0 20px rgba(99, 102, 241, 0.15);
}

.btn-glow:hover {
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.45), 0 0 40px rgba(99, 102, 241, 0.2);
}

.hero-btn-outline {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.hero-btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.6);
    color: #fff;
}

/* Hero trust indicators */
.hero-trust {
    display: flex;
    gap: var(--space-6);
    flex-wrap: wrap;
}

.hero-trust__item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.6);
}

.hero-trust__item svg {
    color: #10B981;
    flex-shrink: 0;
}

/* Hero right visual area */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 340px;
}

.hero-stats-card {
    background: rgba(30, 41, 59, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-xl);
    padding: var(--space-8) var(--space-6);
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
    min-width: 240px;
    position: relative;
    z-index: 1;
}

.hero-stats-card__glow {
    position: absolute;
    top: -40px;
    left: -40px;
    right: -40px;
    bottom: -40px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
    z-index: -1;
    border-radius: 50%;
}

.hero-stat__divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.3), transparent);
}

/* Floating feature cards */
.hero-float-card {
    position: absolute;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: rgba(30, 41, 59, 0.8);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-lg);
    font-size: var(--text-sm);
    font-weight: 600;
    color: #fff;
    white-space: nowrap;
    z-index: 2;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.hero-float-card__icon {
    font-size: 1.25rem;
}

.hero-float-card--1 {
    top: 10%;
    right: -10px;
    animation: floatCard 6s ease-in-out infinite;
}

.hero-float-card--2 {
    bottom: 20%;
    left: -20px;
    animation: floatCard 7s ease-in-out infinite 1s;
}

.hero-float-card--3 {
    bottom: 5%;
    right: 10%;
    animation: floatCard 5s ease-in-out infinite 2s;
}

@keyframes floatCard {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

/* ==========================================================================
   Course Cards
   ========================================================================== */

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--space-6);
}

.course-card {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
    position: relative;
}

.course-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-base);
    z-index: 1;
}

.course-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    border-color: rgba(99, 102, 241, 0.15);
}

.course-card:hover::before {
    opacity: 1;
}

.course-card__thumbnail {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
}

.course-card__thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.course-card:hover .course-card__thumbnail img {
    transform: scale(1.05);
}

.course-card__badge {
    position: absolute;
    top: var(--space-3);
    left: var(--space-3);
    padding: var(--space-1) var(--space-3);
    background: var(--gradient-primary);
    color: #fff;
    font-size: var(--text-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
    box-shadow: 0 2px 6px rgba(99, 102, 241, 0.3);
    z-index: 1;
}

.course-card__body {
    padding: var(--space-6);
}

.course-card__category {
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-2);
}

.course-card__title {
    font-size: var(--text-lg);
    margin-bottom: var(--space-3);
    line-height: 1.4;
}

.course-card__title a {
    color: var(--color-text);
}

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

.course-card__excerpt {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-4);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.course-card__meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-border);
    font-size: var(--text-sm);
}

.course-card__author {
    font-weight: 600;
    color: var(--color-text);
}

.course-card__reading-time {
    color: var(--color-text-muted);
}

/* ==========================================================================
   Section Styles
   ========================================================================== */

.section {
    padding: var(--space-20) 0;
    position: relative;
}

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

.section__header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto var(--space-12);
}

.section__header h2 {
    margin-bottom: var(--space-4);
    letter-spacing: -0.02em;
}

.section__header p {
    color: var(--color-text-secondary);
    font-size: var(--text-lg);
    line-height: 1.7;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
    background: var(--color-dark);
    color: #94A3B8;
    padding: var(--space-16) 0 var(--space-8);
    position: relative;
}

.site-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.3), transparent);
}

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

.footer-grid--5col {
    grid-template-columns: 1.5fr 1fr 1fr 1fr 1fr;
}

.footer-about .site-title {
    font-size: var(--text-xl);
    margin-bottom: var(--space-4);
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-about p {
    font-size: var(--text-sm);
    line-height: 1.7;
}

.footer-widget h4 {
    color: #E2E8F0;
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: var(--space-4);
    font-weight: 700;
}

.footer-widget ul {
    list-style: none;
}

.footer-widget ul li {
    margin-bottom: var(--space-2);
}

.footer-widget ul a {
    color: #64748B;
    font-size: var(--text-sm);
    transition: all var(--transition-fast);
}

.footer-widget ul a:hover {
    color: var(--color-primary-light);
    padding-left: 4px;
}

.footer-bottom {
    border-top: 1px solid rgba(99, 102, 241, 0.1);
    padding-top: var(--space-8);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--text-sm);
    color: #475569;
}

/* ==========================================================================
   Single Course Page
   ========================================================================== */

.course-hero {
    background: var(--color-dark);
    color: #fff;
    padding: var(--space-16) 0;
    position: relative;
    overflow: hidden;
}

.course-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse 50% 80% at 80% 20%, rgba(99, 102, 241, 0.2), transparent),
        radial-gradient(ellipse 40% 40% at 20% 80%, rgba(6, 182, 212, 0.1), transparent);
}

.course-hero > * {
    position: relative;
    z-index: 1;
}

.course-hero__layout {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: var(--space-12);
    align-items: start;
}

.course-hero h1 {
    color: #fff;
    margin-bottom: var(--space-4);
}

/* ==========================================================================
   Search & Filter
   ========================================================================== */

.search-form {
    display: flex;
    gap: var(--space-3);
    max-width: 500px;
}

.search-form input[type="search"] {
    flex: 1;
    padding: var(--space-3) var(--space-4);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    transition: border-color var(--transition-fast);
}

.search-form input[type="search"]:focus {
    outline: none;
    border-color: var(--color-primary);
}

.course-filters {
    display: flex;
    gap: var(--space-3);
    flex-wrap: wrap;
    margin-bottom: var(--space-8);
}

.filter-btn {
    padding: var(--space-2) var(--space-4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    background: var(--color-surface);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-btn:hover {
    border-color: rgba(99, 102, 241, 0.3);
    color: var(--color-primary);
    background: rgba(99, 102, 241, 0.04);
}

.filter-btn.active {
    border-color: var(--color-primary);
    color: #fff;
    background: var(--gradient-primary);
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.25);
}

/* ==========================================================================
   Responsive — Tablet (768px - 1024px)
   ========================================================================== */

@media (max-width: 1024px) {
    .hero-layout {
        grid-template-columns: 1fr;
        gap: var(--space-8);
        text-align: center;
    }

    .hero-content {
        max-width: 100%;
    }

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

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

    .hero-visual {
        min-height: auto;
    }

    .hero-stats-card {
        flex-direction: row;
        justify-content: space-around;
        max-width: 500px;
        margin: 0 auto;
    }

    .hero-stat__divider {
        width: 1px;
        height: 40px;
        background: linear-gradient(180deg, transparent, rgba(99, 102, 241, 0.3), transparent);
    }

    .hero-float-card {
        display: none;
    }

    .course-hero__layout {
        grid-template-columns: 1fr;
    }

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

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-6);
    }

    .contact-layout {
        grid-template-columns: 1fr;
    }

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

    .tutorial-layout__grid {
        grid-template-columns: 1fr;
    }

    .tutorial-toc {
        display: none;
    }
}

/* ==========================================================================
   Responsive — Mobile Large (640px - 768px)
   ========================================================================== */

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }

    .main-navigation {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-bottom: 1px solid rgba(99, 102, 241, 0.08);
        box-shadow: var(--shadow-lg);
        padding: var(--space-4);
    }

    .main-navigation.is-open {
        display: block;
    }

    .main-navigation ul {
        flex-direction: column;
    }

    /* Mobile sub-menu */
    .main-navigation .sub-menu {
        position: static;
        display: none;
        min-width: 0;
        background: transparent;
        border: none;
        box-shadow: none;
        padding: 0 0 0 var(--space-4);
        opacity: 1;
        transform: none;
        transition: none;
    }

    .main-navigation .menu-item-has-children.is-open > .sub-menu {
        display: flex;
    }

    .main-navigation .sub-menu a {
        font-size: var(--text-sm);
        padding: var(--space-2) var(--space-3);
    }

    .header-search__input {
        width: 140px;
    }

    .header-search__input:focus {
        width: 180px;
    }

    .hero-section {
        min-height: auto;
        padding: var(--space-16) 0;
    }

    .hero-content h1 {
        font-size: var(--text-4xl);
    }

    .hero-stats-card {
        flex-direction: row;
        max-width: 100%;
    }

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

    .courses-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }

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

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

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

    .post-navigation__inner {
        grid-template-columns: 1fr;
    }

    .section {
        padding: var(--space-12) 0;
    }

    .cta-banner {
        padding: var(--space-12) var(--space-6);
    }

    .cta-banner__content h2 {
        font-size: var(--text-3xl);
    }
}

/* ==========================================================================
   Responsive — Mobile Small (480px and below)
   ========================================================================== */

@media (max-width: 480px) {
    :root {
        --text-5xl: 2rem;
        --text-4xl: 1.75rem;
        --text-3xl: 1.375rem;
        --text-2xl: 1.25rem;
        --container-padding: var(--space-3);
    }

    .site-header .container {
        height: 60px;
    }

    .hero-section {
        padding: var(--space-12) 0;
    }

    .hero-content h1 {
        font-size: var(--text-4xl);
        line-height: 1.15;
    }

    .hero-content__desc {
        font-size: var(--text-base);
    }

    .hero-actions {
        flex-direction: column;
    }

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

    .hero-trust {
        flex-direction: column;
        gap: var(--space-2);
        align-items: center;
    }

    .hero-stats-card {
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding: var(--space-6);
    }

    .hero-stat__divider {
        width: 60%;
        height: 1px;
        background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.3), transparent);
    }

    .hero-stat__number {
        font-size: var(--text-2xl);
    }

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

    .section__header h2 {
        font-size: var(--text-2xl);
    }

    .dept-card {
        padding: var(--space-4);
        gap: var(--space-4);
        border-left-width: 3px;
    }

    .dept-card__icon {
        width: 44px;
        height: 44px;
        font-size: 1.25rem;
    }

    .dept-card__desc {
        display: none;
    }

    .dept-grid {
        gap: var(--space-3);
    }

    .course-card__body {
        padding: var(--space-4);
    }

    .tutorial-header__title {
        font-size: var(--text-3xl);
    }

    .tutorial-header {
        padding: var(--space-8) 0;
    }

    .back-to-top {
        bottom: var(--space-4);
        right: var(--space-4);
        width: 40px;
        height: 40px;
    }

    .reading-progress {
        top: 60px;
    }

    .cta-banner {
        padding: var(--space-8) var(--space-4);
        border-radius: var(--radius-lg);
    }

    .cta-banner__content h2 {
        font-size: var(--text-2xl);
    }

    .cta-banner__content p {
        font-size: var(--text-base);
    }

    .step-card {
        padding: var(--space-6) var(--space-4);
    }

    .error-404 {
        padding: var(--space-8) 0;
    }

    .error-404__icon {
        font-size: 4rem;
    }
}

/* ==========================================================================
   WordPress Core Styles
   ========================================================================== */

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

.wp-caption-text {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    margin-top: var(--space-2);
}

.alignleft {
    float: left;
    margin-right: var(--space-6);
    margin-bottom: var(--space-4);
}

.alignright {
    float: right;
    margin-left: var(--space-6);
    margin-bottom: var(--space-4);
}

.aligncenter {
    display: block;
    margin: var(--space-6) auto;
}

.screen-reader-text {
    clip: rect(1px, 1px, 1px, 1px);
    height: 1px;
    overflow: hidden;
    position: absolute;
    width: 1px;
    word-wrap: normal;
}

.screen-reader-text:focus {
    background: var(--color-surface);
    clip: auto;
    display: block;
    font-size: var(--text-sm);
    height: auto;
    left: 5px;
    padding: var(--space-4);
    top: 5px;
    width: auto;
    z-index: 100000;
}

/* ==========================================================================
   Header Search
   ========================================================================== */

.header-search {
    position: relative;
}

.header-search__input {
    width: 180px;
    padding: var(--space-2) var(--space-3);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    background: var(--color-bg);
    transition: all var(--transition-base);
    outline: none;
}

.header-search__input:focus,
.header-search.is-expanded .header-search__input {
    width: 260px;
    border-color: rgba(99, 102, 241, 0.4);
    background: var(--color-surface);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.08);
}

/* ==========================================================================
   Hero Stats
   ========================================================================== */

.hero-stat {
    display: flex;
    flex-direction: column;
}

.hero-stat__number {
    font-family: var(--font-heading);
    font-size: var(--text-3xl);
    font-weight: 800;
    background: linear-gradient(135deg, #fff, var(--color-primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-stat__label {
    font-size: var(--text-sm);
    opacity: 0.8;
}

/* ==========================================================================
   Breadcrumbs
   ========================================================================== */

.breadcrumbs {
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-3) 0;
}

.breadcrumbs__list {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    list-style: none;
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    flex-wrap: wrap;
}

.breadcrumbs__item:not(:last-child)::after {
    content: '/';
    margin-left: var(--space-2);
    color: var(--color-border);
}

.breadcrumbs__item a {
    color: var(--color-text-secondary);
}

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

.breadcrumbs__item span[aria-current] {
    color: var(--color-text);
    font-weight: 500;
}

/* ==========================================================================
   Single Tutorial Page
   ========================================================================== */

.tutorial-header {
    background: var(--color-dark);
    color: #fff;
    padding: var(--space-12) 0;
    position: relative;
    overflow: hidden;
}

.tutorial-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse 60% 50% at 0% 100%, rgba(99, 102, 241, 0.2), transparent),
        radial-gradient(ellipse 40% 40% at 100% 0%, rgba(6, 182, 212, 0.12), transparent);
}

.tutorial-header > * {
    position: relative;
    z-index: 1;
}

.tutorial-header__title {
    font-size: var(--text-4xl);
    color: #fff;
    margin-bottom: var(--space-4);
    max-width: 800px;
}

.tutorial-header__excerpt {
    font-size: var(--text-lg);
    opacity: 0.9;
    max-width: 700px;
    margin-bottom: var(--space-6);
    line-height: 1.6;
}

.tutorial-categories {
    display: flex;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

.tutorial-category-tag {
    display: inline-block;
    padding: var(--space-1) var(--space-3);
    background: rgba(99, 102, 241, 0.2);
    border: 1px solid rgba(99, 102, 241, 0.3);
    color: var(--color-primary-light);
    font-size: var(--text-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    backdrop-filter: blur(8px);
}

.tutorial-category-tag:hover {
    background: rgba(99, 102, 241, 0.3);
    color: #fff;
}

/* Tutorial Meta */
.tutorial-meta {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    font-size: var(--text-sm);
    flex-wrap: wrap;
}

.tutorial-header .tutorial-meta {
    opacity: 0.85;
}

.tutorial-meta > span {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.tutorial-meta__author {
    font-weight: 600;
    color: var(--color-text);
}

.tutorial-meta__difficulty {
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: var(--text-xs);
}

.difficulty--beginner .tutorial-meta__difficulty,
.tutorial-meta__difficulty.difficulty--beginner {
    background: rgba(16, 185, 129, 0.2);
    color: #10B981;
}

.difficulty--intermediate .tutorial-meta__difficulty,
.tutorial-meta__difficulty.difficulty--intermediate {
    background: rgba(245, 158, 11, 0.2);
    color: #F59E0B;
}

.difficulty--advanced .tutorial-meta__difficulty,
.tutorial-meta__difficulty.difficulty--advanced {
    background: rgba(239, 68, 68, 0.2);
    color: #EF4444;
}

/* Tutorial Layout with TOC */
.tutorial-layout {
    padding: var(--space-12) 0;
}

.tutorial-layout__grid {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: var(--space-8);
    align-items: start;
}

.tutorial-layout__grid--no-toc {
    grid-template-columns: 1fr;
    max-width: 800px;
    margin: 0 auto;
}

/* Table of Contents */
.tutorial-toc__inner {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    box-shadow: var(--shadow-sm);
}

.tutorial-toc__title {
    font-size: var(--text-sm);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    margin-bottom: var(--space-4);
}

.toc-list {
    list-style: none;
}

.toc-list__item {
    margin-bottom: var(--space-1);
}

.toc-list__item--h3 {
    padding-left: var(--space-4);
}

.toc-list__link {
    display: block;
    padding: var(--space-1) var(--space-2);
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    border-left: 2px solid transparent;
    border-radius: 0;
    transition: all var(--transition-fast);
    line-height: 1.4;
}

.toc-list__link:hover {
    color: var(--color-primary);
    border-left-color: var(--color-primary-light);
}

.toc-list__link.is-active {
    color: var(--color-primary);
    border-left-color: var(--color-primary);
    font-weight: 600;
    background: rgba(99, 102, 241, 0.06);
}

/* Tutorial Content Body */
.tutorial-content {
    font-size: var(--text-base);
    line-height: 1.8;
    color: var(--color-text);
}

.tutorial-content h2 {
    margin-top: var(--space-12);
    margin-bottom: var(--space-4);
    padding-bottom: var(--space-3);
    border-bottom: 1px solid var(--color-border);
}

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

.tutorial-content h4 {
    margin-top: var(--space-6);
    margin-bottom: var(--space-2);
}

.tutorial-content p {
    margin-bottom: var(--space-4);
}

.tutorial-content ul,
.tutorial-content ol {
    margin-bottom: var(--space-4);
    padding-left: var(--space-6);
}

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

.tutorial-content img {
    border-radius: var(--radius-lg);
    margin: var(--space-6) 0;
    box-shadow: var(--shadow-md);
}

.tutorial-content pre {
    background: #1E293B;
    color: #E2E8F0;
    padding: var(--space-6);
    border-radius: var(--radius-lg);
    overflow-x: auto;
    margin: var(--space-6) 0;
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    line-height: 1.6;
}

.tutorial-content code {
    font-family: var(--font-mono);
    font-size: 0.9em;
    background: rgba(79, 70, 229, 0.08);
    color: var(--color-primary-dark);
    padding: 0.15em 0.4em;
    border-radius: var(--radius-sm);
}

.tutorial-content pre code {
    background: none;
    color: inherit;
    padding: 0;
    font-size: inherit;
}

.tutorial-content blockquote {
    border-left: 4px solid var(--color-primary);
    margin: var(--space-6) 0;
    padding: var(--space-4) var(--space-6);
    background: rgba(79, 70, 229, 0.04);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    font-style: italic;
    color: var(--color-text-secondary);
}

.tutorial-content table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--space-6) 0;
    font-size: var(--text-sm);
}

.tutorial-content th,
.tutorial-content td {
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--color-border);
    text-align: left;
}

.tutorial-content th {
    background: var(--color-bg);
    font-weight: 600;
}

.tutorial-content__hero-image {
    margin-bottom: var(--space-8);
}

.tutorial-content__hero-image img {
    border-radius: var(--radius-xl);
    width: 100%;
}

/* ==========================================================================
   Post Navigation
   ========================================================================== */

.post-navigation {
    border-top: 1px solid var(--color-border);
    background: var(--color-surface);
}

.post-navigation__inner {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: var(--space-8) var(--container-padding);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
}

.post-navigation__link {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    padding: var(--space-4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.post-navigation__link:hover {
    border-color: rgba(99, 102, 241, 0.2);
    box-shadow: var(--shadow-sm), var(--shadow-glow);
    transform: translateY(-1px);
}

.post-navigation__link--next {
    text-align: right;
}

.post-navigation__label {
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
}

.post-navigation__title {
    font-weight: 600;
    color: var(--color-text);
    font-size: var(--text-sm);
}

.post-navigation__link:hover .post-navigation__title {
    color: var(--color-primary);
}

/* ==========================================================================
   Related Tutorials
   ========================================================================== */

.related-tutorials {
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
}

.related-tutorials__title {
    margin-bottom: var(--space-8);
}

/* ==========================================================================
   CTA Banner
   ========================================================================== */

.cta-banner {
    background: var(--color-dark);
    border-radius: var(--radius-xl);
    padding: var(--space-16) var(--space-12);
    text-align: center;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(99, 102, 241, 0.15);
}

.cta-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse 60% 80% at 20% 100%, rgba(99, 102, 241, 0.2), transparent),
        radial-gradient(ellipse 50% 50% at 80% 20%, rgba(6, 182, 212, 0.15), transparent);
}

.cta-banner::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(99, 102, 241, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99, 102, 241, 0.04) 1px, transparent 1px);
    background-size: 40px 40px;
}

.cta-banner__content {
    position: relative;
    z-index: 1;
}

.cta-banner__content h2 {
    font-size: var(--text-4xl);
    color: #fff;
    margin-bottom: var(--space-4);
    letter-spacing: -0.02em;
}

.cta-banner__content p {
    font-size: var(--text-lg);
    color: var(--color-text-muted);
    max-width: 520px;
    margin: 0 auto var(--space-8);
    line-height: 1.7;
}

/* ==========================================================================
   About Page
   ========================================================================== */

.about-features {
    margin-top: var(--space-16);
}

.about-features__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: var(--space-6);
}

.about-feature-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    text-align: center;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.about-feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.about-feature-card:hover {
    border-color: rgba(99, 102, 241, 0.2);
    box-shadow: var(--shadow-md), var(--shadow-glow);
    transform: translateY(-3px);
}

.about-feature-card:hover::before {
    opacity: 1;
}

.about-feature-card__icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-4);
}

.about-feature-card h3 {
    font-size: var(--text-lg);
    margin-bottom: var(--space-2);
}

.about-feature-card p {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ==========================================================================
   Contact Page
   ========================================================================== */

.contact-layout {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-12);
    align-items: start;
}

.contact-info-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
}

.contact-info-card h3 {
    font-size: var(--text-lg);
    margin-bottom: var(--space-6);
}

.contact-info-item {
    margin-bottom: var(--space-4);
}

.contact-info-item strong {
    display: block;
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--space-1);
}

.contact-social-links {
    display: flex;
    gap: var(--space-3);
    flex-wrap: wrap;
}

.contact-social-links a {
    padding: var(--space-2) var(--space-3);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.contact-social-links a:hover {
    border-color: rgba(99, 102, 241, 0.3);
    color: var(--color-primary);
    background: rgba(99, 102, 241, 0.04);
    box-shadow: 0 0 12px rgba(99, 102, 241, 0.1);
}

/* ==========================================================================
   Privacy Page
   ========================================================================== */

.privacy-page__updated {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin-top: var(--space-2);
}

/* ==========================================================================
   404 Page
   ========================================================================== */

.error-404 {
    text-align: center;
    padding: var(--space-16) 0;
    max-width: 600px;
    margin: 0 auto;
}

.error-404__icon {
    font-family: var(--font-heading);
    font-size: 6rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-6);
}

.error-404 h1 {
    margin-bottom: var(--space-4);
}

.error-404 p {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-8);
}

.error-404 .search-form {
    margin: 0 auto var(--space-8);
    max-width: 400px;
}

.error-404__links h3 {
    font-size: var(--text-lg);
    margin-bottom: var(--space-4);
}

.error-404__links ul {
    list-style: none;
    margin-bottom: var(--space-4);
}

.error-404__links ul li {
    margin-bottom: var(--space-2);
}

.error-404__links ul a {
    font-size: var(--text-sm);
}

/* ==========================================================================
   No Results
   ========================================================================== */

.no-results {
    text-align: center;
    padding: var(--space-16) 0;
}

.no-results__content {
    max-width: 500px;
    margin: 0 auto;
}

.no-results h2 {
    margin-bottom: var(--space-4);
}

.no-results p {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-6);
}

.no-results .search-form {
    margin: 0 auto;
}

/* ==========================================================================
   Archive Count Badge
   ========================================================================== */

.archive-count {
    display: inline-block;
    margin-top: var(--space-2);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

/* ==========================================================================
   Search Query Highlight
   ========================================================================== */

.search-query {
    color: var(--color-primary);
    font-weight: 600;
}

/* ==========================================================================
   Difficulty Badges on Cards
   ========================================================================== */

.course-card__badge.difficulty--beginner {
    background: var(--color-success);
}

.course-card__badge.difficulty--intermediate {
    background: var(--color-accent);
}

.course-card__badge.difficulty--advanced {
    background: var(--color-error);
}

/* ==========================================================================
   Page Content Defaults
   ========================================================================== */

.page-content__header {
    margin-bottom: var(--space-8);
}

.page-content__header h1 {
    font-size: var(--text-4xl);
}

/* ==========================================================================
   How It Works Steps
   ========================================================================== */

.steps-grid {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 0;
    max-width: 900px;
    margin: 0 auto;
}

.step-card {
    flex: 1;
    text-align: center;
    padding: var(--space-8) var(--space-6);
    position: relative;
}

.step-card__number {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--space-4);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: #fff;
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: 800;
    border-radius: 50%;
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
    position: relative;
    z-index: 1;
}

.step-card__icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-4);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.08), rgba(6, 182, 212, 0.08));
    border: 1px solid rgba(99, 102, 241, 0.12);
    border-radius: var(--radius-xl);
    color: var(--color-primary);
    transition: all var(--transition-base);
}

.step-card:hover .step-card__icon {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(6, 182, 212, 0.15));
    border-color: rgba(99, 102, 241, 0.25);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

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

.step-card p {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.step-card__connector {
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    margin-top: 92px;
    flex-shrink: 0;
    opacity: 0.4;
}

@media (max-width: 768px) {
    .steps-grid {
        flex-direction: column;
        align-items: center;
        gap: 0;
    }
    .step-card {
        max-width: 360px;
    }
    .step-card__connector {
        width: 2px;
        height: 30px;
        margin-top: 0;
    }
}

/* ==========================================================================
   Dark Section Variant (Why Us)
   ========================================================================== */

.section--dark {
    background: var(--color-dark);
    color: #fff;
    position: relative;
    overflow: hidden;
}

.section--dark::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse 50% 50% at 0% 100%, rgba(99, 102, 241, 0.12), transparent),
        radial-gradient(ellipse 40% 50% at 100% 0%, rgba(6, 182, 212, 0.08), transparent);
}

.section--dark > .container {
    position: relative;
    z-index: 1;
}

.section__header--light h2 {
    color: #fff;
}

.section__header--light p {
    color: var(--color-text-muted);
}

.section__badge--dark {
    background: rgba(99, 102, 241, 0.2);
    border-color: rgba(99, 102, 241, 0.3);
    color: var(--color-primary-light);
}

.advantage-card--dark {
    background: rgba(30, 41, 59, 0.6);
    border-color: rgba(99, 102, 241, 0.12);
    backdrop-filter: blur(8px);
}

.advantage-card--dark:hover {
    background: rgba(30, 41, 59, 0.8);
    border-color: rgba(99, 102, 241, 0.3);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.3), var(--shadow-glow);
}

.advantage-card--dark h3 {
    color: #fff;
}

.advantage-card--dark p {
    color: var(--color-text-muted);
}

.advantage-card__icon-wrap {
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(6, 182, 212, 0.15));
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-lg);
    color: var(--color-primary-light);
    margin-bottom: var(--space-4);
    transition: all var(--transition-base);
}

.advantage-card--dark:hover .advantage-card__icon-wrap {
    background: var(--gradient-primary);
    border-color: transparent;
    color: #fff;
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.35);
}

/* ==========================================================================
   CTA Particles
   ========================================================================== */

.cta-banner__particles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.cta-particle {
    position: absolute;
    border-radius: 50%;
}

.cta-particle--1 {
    width: 200px;
    height: 200px;
    top: -60px;
    right: -40px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.15), transparent 70%);
    animation: particleFloat 8s ease-in-out infinite;
}

.cta-particle--2 {
    width: 150px;
    height: 150px;
    bottom: -40px;
    left: -30px;
    background: radial-gradient(circle, rgba(6, 182, 212, 0.12), transparent 70%);
    animation: particleFloat 6s ease-in-out infinite 2s;
}

/* ==========================================================================
   Scroll Reveal Animation
   ========================================================================== */

[data-reveal] {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

[data-reveal].is-revealed {
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================================================
   Section Badge (university-style label above headings)
   ========================================================================== */

.section__badge {
    display: inline-block;
    padding: var(--space-1) var(--space-4);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(6, 182, 212, 0.1));
    border: 1px solid rgba(99, 102, 241, 0.15);
    color: var(--color-primary);
    font-size: var(--text-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-4);
}

.section__footer {
    text-align: center;
    margin-top: var(--space-8);
}

/* Trust bar removed — trust indicators now in hero section */

/* ==========================================================================
   Department Cards (university faculty style)
   ========================================================================== */

.dept-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
}

.dept-card {
    display: flex;
    align-items: center;
    gap: var(--space-6);
    padding: var(--space-6);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-left: 3px solid transparent;
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
    color: var(--color-text);
    position: relative;
}

.dept-card:hover {
    border-left-color: var(--color-primary);
    border-color: rgba(99, 102, 241, 0.2);
    box-shadow: var(--shadow-md), var(--shadow-glow);
    transform: translateY(-2px);
    color: var(--color-text);
}

.dept-card__icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.08), rgba(6, 182, 212, 0.08));
    border: 1px solid rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    flex-shrink: 0;
    transition: all var(--transition-base);
}

.dept-card:hover .dept-card__icon {
    background: var(--gradient-primary);
    border-color: transparent;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.dept-card__body {
    flex: 1;
    min-width: 0;
}

.dept-card__title {
    font-size: var(--text-lg);
    font-weight: 700;
    margin-bottom: var(--space-1);
}

.dept-card__desc {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-1);
    line-height: 1.4;
}

.dept-card__count {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    font-weight: 500;
}

.dept-card__arrow {
    font-size: var(--text-xl);
    color: var(--color-text-muted);
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.dept-card:hover .dept-card__arrow {
    color: var(--color-primary);
    transform: translateX(4px);
}

/* ==========================================================================
   Advantages Grid (why-us section)
   ========================================================================== */

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

.advantage-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.advantage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.advantage-card:hover {
    border-color: rgba(99, 102, 241, 0.2);
    box-shadow: var(--shadow-md), var(--shadow-glow);
    transform: translateY(-3px);
}

.advantage-card:hover::before {
    opacity: 1;
}

.advantage-card__number {
    font-family: var(--font-heading);
    font-size: var(--text-4xl);
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-4);
    line-height: 1;
}

.advantage-card h3 {
    font-size: var(--text-lg);
    margin-bottom: var(--space-3);
    letter-spacing: -0.01em;
}

.advantage-card p {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ==========================================================================
   CTA Banner Badge & Actions
   ========================================================================== */

.cta-banner__badge {
    display: inline-block;
    padding: var(--space-1) var(--space-4);
    background: rgba(99, 102, 241, 0.2);
    border: 1px solid rgba(99, 102, 241, 0.3);
    color: var(--color-primary-light);
    font-size: var(--text-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-4);
    backdrop-filter: blur(8px);
}

.cta-banner__actions {
    display: flex;
    justify-content: center;
    gap: var(--space-4);
}

/* ==========================================================================
   WordPress Native Pagination Styling
   WordPress outputs: nav.navigation > div.nav-links > a/span
   ========================================================================== */

.navigation.pagination {
    margin-top: var(--space-12);
}

.navigation.pagination .nav-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.navigation.pagination .nav-links a,
.navigation.pagination .nav-links span {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 var(--space-3);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
    text-decoration: none;
    background: var(--color-surface);
}

.navigation.pagination .nav-links a:hover {
    border-color: rgba(99, 102, 241, 0.3);
    color: var(--color-primary);
    background: rgba(99, 102, 241, 0.04);
}

.navigation.pagination .nav-links span.current {
    background: var(--gradient-primary);
    border-color: transparent;
    color: #fff;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.25);
}

.navigation.pagination .nav-links span.dots {
    border: none;
    background: none;
    color: var(--color-text-muted);
    min-width: auto;
    padding: 0;
}

.navigation.pagination .nav-links .prev,
.navigation.pagination .nav-links .next {
    font-weight: 600;
    gap: var(--space-1);
}

.navigation.pagination .screen-reader-text {
    clip: rect(1px, 1px, 1px, 1px);
    height: 1px;
    overflow: hidden;
    position: absolute;
    width: 1px;
}

/* ==========================================================================
   Animations & Keyframes
   ========================================================================== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes subtlePulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.hero-content {
    animation: fadeInUp 0.6s ease-out;
}

.hero-stats-card {
    animation: fadeInUp 0.6s ease-out 0.15s both;
}

.hero-content__badge {
    animation: fadeInUp 0.5s ease-out 0.05s both;
}

/* Gradient text utility for headings */
.gradient-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Focus ring for accessibility */
:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* Selection color */
::selection {
    background: rgba(99, 102, 241, 0.15);
    color: var(--color-text);
}

/* Scrollbar styling for webkit browsers */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-muted);
}

/* ==========================================================================
   Reading Progress Bar
   ========================================================================== */

.reading-progress {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    height: 3px;
    background: rgba(99, 102, 241, 0.1);
    z-index: 99;
}

.reading-progress__bar {
    height: 100%;
    width: 0;
    background: var(--gradient-primary);
    transition: width 50ms linear;
    border-radius: 0 2px 2px 0;
}

/* ==========================================================================
   Copy Code Button
   ========================================================================== */

.code-block-wrapper {
    position: relative;
}

.copy-code-btn {
    position: absolute;
    top: var(--space-2);
    right: var(--space-2);
    padding: var(--space-1) var(--space-3);
    background: rgba(99, 102, 241, 0.15);
    border: 1px solid rgba(99, 102, 241, 0.25);
    color: var(--color-primary-light);
    font-family: var(--font-sans);
    font-size: var(--text-xs);
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    z-index: 1;
}

.copy-code-btn:hover {
    background: rgba(99, 102, 241, 0.25);
    border-color: rgba(99, 102, 241, 0.4);
}

.copy-code-btn.is-copied {
    background: rgba(16, 185, 129, 0.2);
    border-color: rgba(16, 185, 129, 0.3);
    color: #10B981;
}

/* ==========================================================================
   Back to Top Button
   ========================================================================== */

.back-to-top {
    position: fixed;
    bottom: var(--space-8);
    right: var(--space-8);
    width: 44px;
    height: 44px;
    background: var(--color-dark);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-lg);
    color: var(--color-primary-light);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-base);
    z-index: 90;
    box-shadow: var(--shadow-lg);
}

.back-to-top.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #fff;
    box-shadow: var(--shadow-glow-lg);
}