/* ==========================================
   Vibe Coding Blog - Pastel Theme Stylesheet
   ========================================== */

/* CSS Variables - パステルカラーパレット */
:root {
    /* Primary Pastel Colors */
    --pastel-pink: #FFD1DC;
    --pastel-purple: #E0BBE4;
    --pastel-lavender: #D4A5FF;
    --pastel-blue: #A8D8EA;
    --pastel-mint: #B5EAD7;
    --pastel-green: #C7F0DB;
    --pastel-yellow: #FFEAA7;
    --pastel-peach: #FFDAB9;
    --pastel-coral: #FFB7B2;
    
    /* Gradient Colors */
    --gradient-primary: linear-gradient(135deg, var(--pastel-pink) 0%, var(--pastel-purple) 50%, var(--pastel-blue) 100%);
    --gradient-secondary: linear-gradient(135deg, var(--pastel-mint) 0%, var(--pastel-blue) 100%);
    --gradient-warm: linear-gradient(135deg, var(--pastel-peach) 0%, var(--pastel-pink) 100%);
    
    /* Text Colors */
    --text-primary: #4A4A4A;
    --text-secondary: #6B7280;
    --text-light: #9CA3AF;
    --text-white: #FFFFFF;
    
    /* Background Colors */
    --bg-main: #FEFEFE;
    --bg-soft: #FDF8F9;
    --bg-card: #FFFFFF;
    --bg-footer: #F8F4F6;
    
    /* UI Colors */
    --border-light: #F0E6EA;
    --shadow-soft: rgba(230, 200, 210, 0.2);
    --shadow-medium: rgba(200, 170, 190, 0.15);
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Font Families */
    --font-primary: 'Noto Sans JP', 'Poppins', sans-serif;
    --font-heading: 'Poppins', 'Noto Sans JP', sans-serif;
}

/* ==========================================
   Reset & Base Styles
   ========================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* ==========================================
   Navigation
   ========================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px var(--shadow-soft);
    padding: var(--space-md) 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.logo i {
    font-size: 1.8rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: var(--space-xl);
}

.nav-links a {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 500;
    color: var(--text-secondary);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-full);
    transition: var(--transition-normal);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary);
    background: var(--pastel-pink);
}

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    color: var(--text-primary);
    padding: var(--space-sm);
}

/* ==========================================
   Hero Section
   ========================================== */
.hero {
    position: relative;
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: calc(80px + var(--space-3xl)) var(--space-lg) var(--space-3xl);
    background: var(--gradient-primary);
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 10;
}

.hero h1 {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    color: var(--text-white);
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    margin-bottom: var(--space-md);
}

.hero p {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    color: var(--text-white);
    opacity: 0.95;
    margin-bottom: var(--space-xl);
}

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

.tag {
    background: rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(5px);
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-full);
    color: var(--text-white);
    font-weight: 500;
    font-size: 0.9rem;
}

/* Blob Decorations */
.hero-decoration {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.6;
    animation: float 8s ease-in-out infinite;
}

.blob-1 {
    width: 400px;
    height: 400px;
    background: var(--pastel-lavender);
    top: -100px;
    right: -100px;
    animation-delay: 0s;
}

.blob-2 {
    width: 300px;
    height: 300px;
    background: var(--pastel-mint);
    bottom: -50px;
    left: -50px;
    animation-delay: 2s;
}

.blob-3 {
    width: 250px;
    height: 250px;
    background: var(--pastel-yellow);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-20px) scale(1.05); }
}

/* ==========================================
   Main Content
   ========================================== */
.main-content {
    padding: var(--space-3xl) var(--space-lg);
    background: var(--bg-soft);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-xl);
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.section-title i {
    color: var(--pastel-purple);
}

/* ==========================================
   Category Filters
   ========================================== */
.filter-section {
    margin-bottom: var(--space-2xl);
}

.category-filters {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.filter-btn {
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-full);
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text-secondary);
    background: var(--bg-card);
    border: 2px solid var(--border-light);
    transition: var(--transition-normal);
}

.filter-btn:hover {
    border-color: var(--pastel-purple);
    color: var(--text-primary);
}

.filter-btn.active {
    background: var(--gradient-primary);
    color: var(--text-white);
    border-color: transparent;
}

/* ==========================================
   Blog Grid
   ========================================== */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--space-xl);
    margin-bottom: var(--space-3xl);
}

.blog-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 10px 40px var(--shadow-soft);
    transition: var(--transition-normal);
}

.blog-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px var(--shadow-medium);
}

.card-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.card-image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-warm);
    font-size: 4rem;
    color: var(--text-white);
}

.card-image-placeholder.purple {
    background: linear-gradient(135deg, var(--pastel-purple) 0%, var(--pastel-lavender) 100%);
}

.card-image-placeholder.green {
    background: linear-gradient(135deg, var(--pastel-mint) 0%, var(--pastel-green) 100%);
}

.card-image-placeholder.yellow {
    background: linear-gradient(135deg, var(--pastel-yellow) 0%, var(--pastel-peach) 100%);
}

.card-image-placeholder.pink {
    background: linear-gradient(135deg, var(--pastel-pink) 0%, var(--pastel-coral) 100%);
}

.card-image-placeholder.blue {
    background: linear-gradient(135deg, var(--pastel-blue) 0%, var(--pastel-lavender) 100%);
}

.card-category {
    position: absolute;
    top: var(--space-md);
    left: var(--space-md);
    background: rgba(255, 255, 255, 0.95);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-primary);
}

.card-content {
    padding: var(--space-xl);
}

.card-meta {
    display: flex;
    gap: var(--space-lg);
    font-size: 0.85rem;
    color: var(--text-light);
    margin-bottom: var(--space-md);
}

.card-meta i {
    margin-right: var(--space-xs);
}

.card-title {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 600;
    line-height: 1.5;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
}

.card-excerpt {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-md);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.mini-tag {
    font-size: 0.75rem;
    color: var(--text-secondary);
    background: var(--bg-soft);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
}

.read-more {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
    transition: var(--transition-normal);
}

.read-more:hover {
    gap: var(--space-md);
    color: var(--pastel-purple);
}

.read-more i {
    transition: var(--transition-normal);
}

/* ==========================================
   Newsletter Section
   ========================================== */
.newsletter-section {
    background: var(--gradient-secondary);
    border-radius: var(--radius-xl);
    padding: var(--space-3xl);
    text-align: center;
}

.newsletter-icon {
    width: 80px;
    height: 80px;
    background: var(--bg-card);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-xl);
    font-size: 2rem;
    color: var(--pastel-purple);
    box-shadow: 0 10px 30px var(--shadow-soft);
}

.newsletter-content h2 {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
}

.newsletter-content p {
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
}

.newsletter-form {
    display: flex;
    gap: var(--space-md);
    max-width: 500px;
    margin: 0 auto;
}

.newsletter-form input {
    flex: 1;
    padding: var(--space-md) var(--space-lg);
    border: 2px solid transparent;
    border-radius: var(--radius-full);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition-normal);
}

.newsletter-form input:focus {
    outline: none;
    border-color: var(--pastel-purple);
}

.newsletter-form button {
    padding: var(--space-md) var(--space-xl);
    background: var(--gradient-primary);
    color: var(--text-white);
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: var(--transition-normal);
}

.newsletter-form button:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 30px var(--shadow-medium);
}

/* ==========================================
   Profile Page Styles
   ========================================== */
.profile-hero {
    position: relative;
    min-height: 50vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: calc(80px + var(--space-3xl)) var(--space-lg) var(--space-3xl);
    background: var(--gradient-primary);
    overflow: hidden;
}

.profile-hero-content {
    position: relative;
    z-index: 10;
}

.profile-avatar {
    position: relative;
    width: 150px;
    height: 150px;
    margin: 0 auto var(--space-xl);
}

.avatar-placeholder {
    width: 100%;
    height: 100%;
    background: var(--bg-card);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: var(--pastel-purple);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    border: 5px solid var(--bg-card);
}

.avatar-status {
    position: absolute;
    bottom: 10px;
    right: 10px;
    width: 20px;
    height: 20px;
    background: var(--pastel-green);
    border-radius: 50%;
    border: 3px solid var(--bg-card);
}

.profile-hero h1 {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    color: var(--text-white);
    margin-bottom: var(--space-md);
}

.profile-tagline {
    font-size: 1.2rem;
    color: var(--text-white);
    opacity: 0.95;
    margin-bottom: var(--space-xl);
}

.profile-social {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
}

.social-link {
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(5px);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    color: var(--text-white);
    transition: var(--transition-normal);
}

.social-link:hover {
    background: var(--bg-card);
    color: var(--pastel-purple);
    transform: translateY(-3px);
}

.profile-decoration {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

/* Profile Sections */
.profile-page {
    background: var(--bg-soft);
}

.profile-section {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    margin-bottom: var(--space-xl);
    box-shadow: 0 10px 40px var(--shadow-soft);
}

.section-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--text-white);
    margin-bottom: var(--space-lg);
}

.profile-section h2 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-xl);
}

/* About Section */
.about-content p {
    margin-bottom: var(--space-md);
    line-height: 1.9;
    color: var(--text-secondary);
}

.about-content strong {
    color: var(--text-primary);
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-lg);
}

.skill-card {
    background: var(--bg-soft);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    text-align: center;
    transition: var(--transition-normal);
}

.skill-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px var(--shadow-soft);
}

.skill-icon {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    margin: 0 auto var(--space-md);
}

.skill-icon.ai {
    background: var(--pastel-purple);
    color: var(--text-white);
}

.skill-icon.frontend {
    background: var(--pastel-pink);
    color: var(--text-white);
}

.skill-icon.backend {
    background: var(--pastel-blue);
    color: var(--text-white);
}

.skill-icon.other {
    background: var(--pastel-mint);
    color: var(--text-white);
}

.skill-card h3 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
}

.skill-list {
    text-align: left;
}

.skill-list li {
    padding: var(--space-xs) 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
    position: relative;
    padding-left: var(--space-md);
}

.skill-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--pastel-purple);
}

/* Philosophy Section */
.philosophy-quote {
    background: var(--gradient-primary);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-xl);
}

.philosophy-quote p {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--text-white);
    line-height: 1.8;
    text-align: center;
}

.philosophy-points {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.point-card {
    background: var(--bg-soft);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    position: relative;
}

.point-number {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--pastel-purple);
    opacity: 0.3;
    margin-bottom: var(--space-sm);
}

.point-card h4 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.point-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Timeline Section */
.timeline {
    position: relative;
    padding-left: var(--space-xl);
}

.timeline::before {
    content: '';
    position: absolute;
    left: 10px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
}

.timeline-item {
    position: relative;
    padding-bottom: var(--space-xl);
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-marker {
    position: absolute;
    left: calc(-1 * var(--space-xl) + 3px);
    top: 5px;
    width: 18px;
    height: 18px;
    background: var(--pastel-purple);
    border-radius: 50%;
    border: 4px solid var(--bg-card);
}

.timeline-content {
    background: var(--bg-soft);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
}

.timeline-date {
    display: inline-block;
    background: var(--gradient-primary);
    color: var(--text-white);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.timeline-content h4 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.timeline-content p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Contact Section */
.contact-content {
    text-align: center;
}

.contact-content > p {
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
}

.contact-methods {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-lg);
}

.contact-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    background: var(--bg-soft);
    border-radius: var(--radius-lg);
    padding: var(--space-xl) var(--space-2xl);
    transition: var(--transition-normal);
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px var(--shadow-soft);
    background: var(--gradient-primary);
    color: var(--text-white);
}

.contact-card i {
    font-size: 2rem;
    color: var(--pastel-purple);
}

.contact-card:hover i {
    color: var(--text-white);
}

.contact-card span {
    font-weight: 600;
    font-size: 1.1rem;
}

.contact-card small {
    font-size: 0.85rem;
    color: var(--text-light);
}

.contact-card:hover small {
    color: rgba(255, 255, 255, 0.8);
}

/* ==========================================
   Footer
   ========================================== */
.footer {
    background: var(--bg-footer);
    padding: var(--space-3xl) var(--space-lg) var(--space-xl);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
}

.footer-logo i {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-brand p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.footer-links h4,
.footer-social h4 {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

.footer-links ul li {
    margin-bottom: var(--space-sm);
}

.footer-links a {
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--pastel-purple);
}

.social-icons {
    display: flex;
    gap: var(--space-md);
}

.social-icons a {
    width: 40px;
    height: 40px;
    background: var(--bg-card);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: var(--transition-normal);
}

.social-icons a:hover {
    background: var(--gradient-primary);
    color: var(--text-white);
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border-light);
}

.footer-bottom p {
    font-size: 0.85rem;
    color: var(--text-light);
}

/* ==========================================
   Responsive Design
   ========================================== */
@media (max-width: 992px) {
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
    
    .footer-brand {
        grid-column: span 2;
        max-width: none;
        text-align: center;
    }
    
    .footer-links,
    .footer-social {
        text-align: center;
    }
    
    .social-icons {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }
    
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-card);
        flex-direction: column;
        padding: var(--space-lg);
        gap: var(--space-md);
        box-shadow: 0 10px 30px var(--shadow-medium);
        transform: translateY(-150%);
        opacity: 0;
        transition: var(--transition-normal);
    }
    
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
    }
    
    .nav-links a {
        justify-content: center;
        padding: var(--space-md);
    }
    
    .hero {
        min-height: 50vh;
        padding-top: calc(70px + var(--space-2xl));
    }
    
    .blog-grid {
        grid-template-columns: 1fr;
    }
    
    .newsletter-form {
        flex-direction: column;
    }
    
    .newsletter-form button {
        width: 100%;
    }
    
    .profile-avatar {
        width: 120px;
        height: 120px;
    }
    
    .avatar-placeholder {
        font-size: 3rem;
    }
    
    .profile-section {
        padding: var(--space-xl);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-brand {
        grid-column: span 1;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    
    .hero-tags {
        flex-direction: column;
        align-items: center;
    }
    
    .category-filters {
        justify-content: center;
    }
    
    .filter-btn {
        padding: var(--space-sm) var(--space-md);
        font-size: 0.85rem;
    }
    
    .card-meta {
        flex-direction: column;
        gap: var(--space-sm);
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .philosophy-points {
        grid-template-columns: 1fr;
    }
    
    .contact-methods {
        flex-direction: column;
    }
    
    .contact-card {
        width: 100%;
    }
}

/* ==========================================
   Utility Classes
   ========================================== */
.hidden {
    display: none !important;
}

.fade-in {
    animation: fadeIn 0.5s ease;
}

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

/* Smooth card transitions for filtering */
.blog-card.hidden {
    display: none;
}

.blog-card {
    animation: fadeIn 0.4s ease;
}

.blog-card.page-hidden {
    display: none;
}

/* ==========================================
   Dark Mode
   ========================================== */
[data-theme="dark"] {
    --pastel-pink: #8B5A6B;
    --pastel-purple: #7B5D8E;
    --pastel-lavender: #6B4D7E;
    --pastel-blue: #5B7D8E;
    --pastel-mint: #5B8E7D;
    --pastel-green: #5B8E6D;
    --pastel-yellow: #8E8B5B;
    --pastel-peach: #8E7B5B;
    --pastel-coral: #8E6B5B;
    
    --text-primary: #E8E8E8;
    --text-secondary: #B8B8B8;
    --text-light: #888888;
    --text-white: #FFFFFF;
    
    --bg-main: #1A1A2E;
    --bg-soft: #16213E;
    --bg-card: #1F2544;
    --bg-footer: #0F0F1A;
    
    --border-light: #2A2A4A;
    --shadow-soft: rgba(0, 0, 0, 0.3);
    --shadow-medium: rgba(0, 0, 0, 0.4);
    
    --gradient-primary: linear-gradient(135deg, #8B5A6B 0%, #7B5D8E 50%, #5B7D8E 100%);
    --gradient-secondary: linear-gradient(135deg, #5B8E7D 0%, #5B7D8E 100%);
    --gradient-warm: linear-gradient(135deg, #8E7B5B 0%, #8B5A6B 100%);
}

[data-theme="dark"] .navbar {
    background: rgba(26, 26, 46, 0.95);
}

[data-theme="dark"] .card-image-placeholder,
[data-theme="dark"] .card-image-placeholder.purple,
[data-theme="dark"] .card-image-placeholder.green,
[data-theme="dark"] .card-image-placeholder.yellow,
[data-theme="dark"] .card-image-placeholder.pink,
[data-theme="dark"] .card-image-placeholder.blue {
    opacity: 0.9;
}

[data-theme="dark"] .blog-card {
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .search-modal-content {
    background: var(--bg-card);
}

/* ==========================================
   Nav Right (Search & Theme Toggle)
   ========================================== */
.nav-right {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.search-toggle,
.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-soft);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    transition: var(--transition-normal);
    border: none;
    cursor: pointer;
}

.search-toggle:hover,
.theme-toggle:hover {
    background: var(--gradient-primary);
    color: var(--text-white);
    transform: scale(1.05);
}

/* ==========================================
   Search Modal
   ========================================== */
.search-modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
    z-index: 2000;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: var(--space-3xl) var(--space-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
}

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

.search-modal-content {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 600px;
    max-height: 80vh;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    transform: translateY(-20px);
    transition: var(--transition-normal);
}

.search-modal.active .search-modal-content {
    transform: translateY(0);
}

.search-close {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-soft);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    cursor: pointer;
    border: none;
    transition: var(--transition-fast);
}

.search-close:hover {
    background: var(--pastel-coral);
    color: var(--text-white);
}

.search-input-wrapper {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-xl);
    border-bottom: 1px solid var(--border-light);
}

.search-input-wrapper i {
    font-size: 1.2rem;
    color: var(--text-light);
}

.search-input-wrapper input {
    flex: 1;
    border: none;
    background: none;
    font-size: 1.1rem;
    color: var(--text-primary);
    font-family: inherit;
}

.search-input-wrapper input:focus {
    outline: none;
}

.search-input-wrapper input::placeholder {
    color: var(--text-light);
}

.search-results {
    max-height: calc(80vh - 100px);
    overflow-y: auto;
    padding: var(--space-md);
}

.search-hint,
.search-no-results {
    text-align: center;
    padding: var(--space-2xl);
    color: var(--text-light);
}

.search-result-item {
    display: flex;
    gap: var(--space-md);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.search-result-item:hover {
    background: var(--bg-soft);
}

.search-result-icon {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--text-white);
    flex-shrink: 0;
}

.search-result-icon.pink { background: var(--gradient-warm); }
.search-result-icon.purple { background: linear-gradient(135deg, var(--pastel-purple), var(--pastel-lavender)); }
.search-result-icon.green { background: linear-gradient(135deg, var(--pastel-mint), var(--pastel-green)); }
.search-result-icon.yellow { background: linear-gradient(135deg, var(--pastel-yellow), var(--pastel-peach)); }
.search-result-icon.blue { background: linear-gradient(135deg, var(--pastel-blue), var(--pastel-lavender)); }

.search-result-content {
    flex: 1;
    min-width: 0;
}

.search-result-category {
    font-size: 0.75rem;
    color: var(--pastel-purple);
    font-weight: 600;
}

.search-result-content h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: var(--space-xs) 0;
    line-height: 1.4;
}

.search-result-content h4 mark {
    background: var(--pastel-yellow);
    color: var(--text-primary);
    padding: 0 2px;
    border-radius: 2px;
}

.search-result-content p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.search-result-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    margin-top: var(--space-sm);
}

.search-result-tags span {
    font-size: 0.7rem;
    color: var(--text-light);
}

/* ==========================================
   Pagination
   ========================================== */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-md);
    margin: var(--space-2xl) 0;
}

.page-btn {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: var(--bg-card);
    color: var(--text-secondary);
    border: 2px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition-normal);
}

.page-btn:hover:not(:disabled) {
    background: var(--gradient-primary);
    color: var(--text-white);
    border-color: transparent;
}

.page-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.page-numbers {
    display: flex;
    gap: var(--space-sm);
}

.page-num {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-card);
    color: var(--text-secondary);
    border: 2px solid var(--border-light);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-normal);
}

.page-num:hover {
    border-color: var(--pastel-purple);
    color: var(--text-primary);
}

.page-num.active {
    background: var(--gradient-primary);
    color: var(--text-white);
    border-color: transparent;
}

/* ==========================================
   Tags Page Styles
   ========================================== */
.page-hero {
    position: relative;
    min-height: 35vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: calc(80px + var(--space-2xl)) var(--space-lg) var(--space-2xl);
    background: var(--gradient-primary);
    overflow: hidden;
}

.page-hero-content h1 {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    color: var(--text-white);
    margin-bottom: var(--space-md);
}

.page-hero-content h1 i {
    margin-right: var(--space-md);
}

.page-hero-content p {
    font-size: 1.1rem;
    color: var(--text-white);
    opacity: 0.9;
}

/* Selected Tag Section */
.selected-tag-section {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    margin-bottom: var(--space-xl);
    box-shadow: 0 10px 40px var(--shadow-soft);
}

.selected-tag-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.selected-tag-header h2 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    color: var(--text-primary);
}

.clear-tag-btn {
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-full);
    background: var(--bg-soft);
    color: var(--text-secondary);
    font-size: 0.9rem;
    cursor: pointer;
    border: none;
    transition: var(--transition-fast);
}

.clear-tag-btn:hover {
    background: var(--pastel-coral);
    color: var(--text-white);
}

/* Tags Cloud */
.tags-cloud-section {
    margin-bottom: var(--space-2xl);
}

.tags-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    justify-content: center;
}

.tag-cloud-item {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: var(--bg-card);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    font-weight: 500;
    border: 2px solid var(--border-light);
    transition: var(--transition-normal);
}

.tag-cloud-item:hover,
.tag-cloud-item.active {
    background: var(--gradient-primary);
    color: var(--text-white);
    border-color: transparent;
    transform: scale(1.05);
}

.tag-cloud-item.size-sm { font-size: 0.85rem; }
.tag-cloud-item.size-md { font-size: 0.95rem; }
.tag-cloud-item.size-lg { font-size: 1.05rem; }
.tag-cloud-item.size-xl { font-size: 1.15rem; }

.tag-count {
    background: rgba(255, 255, 255, 0.2);
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
}

.tag-cloud-item:hover .tag-count,
.tag-cloud-item.active .tag-count {
    background: rgba(255, 255, 255, 0.3);
}

/* Tags Categories */
.tags-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-lg);
}

.tag-category-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 10px 40px var(--shadow-soft);
}

.category-header {
    padding: var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    color: var(--text-white);
}

.category-header.beginner { background: var(--gradient-warm); }
.category-header.tips { background: linear-gradient(135deg, var(--pastel-purple), var(--pastel-lavender)); }
.category-header.tools { background: linear-gradient(135deg, var(--pastel-mint), var(--pastel-green)); }
.category-header.ai { background: linear-gradient(135deg, var(--pastel-blue), var(--pastel-lavender)); }

.category-header i {
    font-size: 1.5rem;
}

.category-header h3 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
}

.category-tags {
    padding: var(--space-lg);
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.category-tag {
    padding: var(--space-xs) var(--space-md);
    background: var(--bg-soft);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

.category-tag:hover {
    background: var(--pastel-purple);
    color: var(--text-white);
}

/* ==========================================
   Article Page Styles
   ========================================== */
.article-hero {
    position: relative;
    min-height: 45vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: calc(80px + var(--space-2xl)) var(--space-lg) var(--space-2xl);
    background: var(--gradient-primary);
    overflow: hidden;
}

.article-hero-content {
    position: relative;
    z-index: 10;
    max-width: 800px;
}

.article-meta-top {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.article-category {
    background: rgba(255, 255, 255, 0.9);
    padding: var(--space-xs) var(--space-lg);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
}

.article-date {
    color: var(--text-white);
    opacity: 0.9;
}

.article-hero h1 {
    font-family: var(--font-heading);
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--text-white);
    line-height: 1.4;
    margin-bottom: var(--space-md);
}

.article-excerpt {
    font-size: 1.1rem;
    color: var(--text-white);
    opacity: 0.9;
    margin-bottom: var(--space-lg);
}

.article-tags {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.article-tags .mini-tag {
    background: rgba(255, 255, 255, 0.2);
    color: var(--text-white);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    transition: var(--transition-fast);
}

.article-tags .mini-tag:hover {
    background: rgba(255, 255, 255, 0.4);
}

.article-info {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
    color: var(--text-white);
    opacity: 0.85;
    font-size: 0.9rem;
}

/* Article Main Layout */
.article-main {
    padding: var(--space-3xl) var(--space-lg);
    background: var(--bg-soft);
}

.article-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: var(--space-2xl);
}

/* TOC Sidebar */
.toc-sidebar {
    position: relative;
}

.toc-wrapper {
    position: sticky;
    top: 100px;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: 0 10px 40px var(--shadow-soft);
}

.toc-wrapper h3 {
    font-family: var(--font-heading);
    font-size: 1rem;
    color: var(--text-primary);
    margin-bottom: var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.toc-wrapper h3 i {
    color: var(--pastel-purple);
}

.toc-list {
    margin-bottom: var(--space-xl);
}

.toc-item {
    margin-bottom: var(--space-sm);
}

.toc-link {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.4;
    transition: var(--transition-fast);
}

.toc-link:hover {
    background: var(--bg-soft);
    color: var(--text-primary);
}

.toc-link.active {
    background: var(--gradient-primary);
    color: var(--text-white);
}

.toc-number {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    background: var(--bg-soft);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    font-weight: 600;
}

.toc-link.active .toc-number {
    background: rgba(255, 255, 255, 0.2);
}

.reading-progress {
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border-light);
}

.reading-progress span {
    font-size: 0.8rem;
    color: var(--text-light);
}

.progress-bar {
    height: 6px;
    background: var(--bg-soft);
    border-radius: var(--radius-full);
    margin: var(--space-sm) 0;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    width: 0%;
    transition: width 0.3s ease;
}

/* Article Content */
.article-content {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    box-shadow: 0 10px 40px var(--shadow-soft);
}

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

.article-content h2 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-sm);
    border-bottom: 3px solid var(--pastel-purple);
}

.article-content h3 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: var(--space-xl) 0 var(--space-md);
}

.article-content p {
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: var(--space-md);
}

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

.article-content li {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--space-sm);
}

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

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

.article-content blockquote {
    background: var(--gradient-primary);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    margin: var(--space-xl) 0;
}

.article-content blockquote p {
    color: var(--text-white);
    font-size: 1.1rem;
    font-weight: 500;
    text-align: center;
    margin: 0;
}

.article-content pre {
    background: #2D3748;
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    overflow-x: auto;
    margin: var(--space-lg) 0;
}

.article-content code {
    font-family: 'Fira Code', 'Consolas', monospace;
    font-size: 0.9rem;
    color: #E2E8F0;
    line-height: 1.6;
}

/* Info & Warning Boxes */
.info-box,
.warning-box {
    display: flex;
    gap: var(--space-md);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    margin: var(--space-xl) 0;
}

.info-box {
    background: linear-gradient(135deg, rgba(168, 216, 234, 0.2), rgba(181, 234, 215, 0.2));
    border-left: 4px solid var(--pastel-blue);
}

.warning-box {
    background: linear-gradient(135deg, rgba(255, 183, 178, 0.2), rgba(255, 234, 167, 0.2));
    border-left: 4px solid var(--pastel-coral);
}

.info-icon,
.warning-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.info-icon {
    background: var(--pastel-blue);
    color: var(--text-white);
}

.warning-icon {
    background: var(--pastel-coral);
    color: var(--text-white);
}

.info-content h4,
.warning-content h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.info-content p,
.warning-content p {
    font-size: 0.95rem;
    margin: 0;
}

/* Summary Box */
.summary-box {
    background: var(--bg-soft);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    margin-top: var(--space-xl);
}

.summary-box h4 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.summary-box h4 i {
    color: var(--pastel-mint);
}

.summary-box ul {
    margin: 0;
}

/* Share Section */
.share-section {
    margin-top: var(--space-2xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border-light);
}

.share-section h4 {
    font-family: var(--font-heading);
    font-size: 1rem;
    color: var(--text-primary);
    margin-bottom: var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.share-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.share-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-white);
    transition: var(--transition-normal);
    border: none;
    cursor: pointer;
}

.share-btn.twitter { background: #1DA1F2; }
.share-btn.facebook { background: #4267B2; }
.share-btn.line { background: #00B900; }
.share-btn.hatena { background: #00A4DE; }
.share-btn.copy { background: var(--text-secondary); }

.share-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.share-btn.copied {
    background: var(--pastel-mint);
}

/* Author Box */
.author-box {
    display: flex;
    gap: var(--space-lg);
    padding: var(--space-xl);
    background: var(--bg-soft);
    border-radius: var(--radius-lg);
    margin-top: var(--space-2xl);
}

.author-avatar {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--text-white);
    flex-shrink: 0;
}

.author-info h4 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.author-info p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
}

.author-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--pastel-purple);
    font-weight: 500;
    font-size: 0.9rem;
}

.author-link:hover {
    gap: var(--space-md);
}

/* Related Articles */
.related-articles {
    margin-top: var(--space-2xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border-light);
}

.related-articles h3 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-bottom: var(--space-xl);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    border-bottom: none;
    padding-bottom: 0;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-lg);
}

.related-card {
    display: flex;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--bg-soft);
    border-radius: var(--radius-md);
    transition: var(--transition-normal);
}

.related-card:hover {
    background: var(--bg-card);
    box-shadow: 0 10px 30px var(--shadow-soft);
    transform: translateY(-3px);
}

.related-image {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--text-white);
    flex-shrink: 0;
}

.related-image.purple { background: linear-gradient(135deg, var(--pastel-purple), var(--pastel-lavender)); }
.related-image.green { background: linear-gradient(135deg, var(--pastel-mint), var(--pastel-green)); }
.related-image.yellow { background: linear-gradient(135deg, var(--pastel-yellow), var(--pastel-peach)); }
.related-image.pink { background: var(--gradient-warm); }
.related-image.blue { background: linear-gradient(135deg, var(--pastel-blue), var(--pastel-lavender)); }

.related-content {
    flex: 1;
    min-width: 0;
}

.related-category {
    font-size: 0.7rem;
    color: var(--pastel-purple);
    font-weight: 600;
}

.related-content h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.4;
    margin: var(--space-xs) 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.related-date {
    font-size: 0.75rem;
    color: var(--text-light);
}

/* Article Navigation */
.article-nav {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--space-lg);
    margin-top: var(--space-2xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border-light);
}

.nav-prev,
.nav-next {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    padding: var(--space-md);
    background: var(--bg-soft);
    border-radius: var(--radius-md);
    transition: var(--transition-normal);
}

.nav-prev:hover,
.nav-next:hover {
    background: var(--gradient-primary);
}

.nav-prev:hover .nav-label,
.nav-prev:hover .nav-title,
.nav-next:hover .nav-label,
.nav-next:hover .nav-title {
    color: var(--text-white);
}

.nav-next {
    text-align: right;
}

.nav-label {
    font-size: 0.8rem;
    color: var(--text-light);
}

.nav-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.nav-home {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: var(--space-md);
    background: var(--bg-soft);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    transition: var(--transition-normal);
}

.nav-home:hover {
    background: var(--pastel-purple);
    color: var(--text-white);
}

.nav-home i {
    font-size: 1.2rem;
}

.nav-home span {
    font-size: 0.8rem;
}

/* Blog Card Link Wrapper */
.blog-card a {
    display: block;
    color: inherit;
}

.blog-card a:hover {
    color: inherit;
}

/* ==========================================
   Article Page Responsive
   ========================================== */
@media (max-width: 992px) {
    .article-container {
        grid-template-columns: 1fr;
    }
    
    .toc-sidebar {
        display: none;
    }
}

@media (max-width: 768px) {
    .article-meta-top {
        flex-direction: column;
        gap: var(--space-sm);
    }
    
    .article-info {
        flex-direction: column;
        gap: var(--space-sm);
    }
    
    .article-content {
        padding: var(--space-xl);
    }
    
    .author-box {
        flex-direction: column;
        text-align: center;
    }
    
    .article-nav {
        grid-template-columns: 1fr;
    }
    
    .nav-next {
        text-align: left;
    }
    
    .share-buttons {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .nav-right {
        order: 2;
    }
    
    .search-toggle,
    .theme-toggle {
        width: 36px;
        height: 36px;
        font-size: 0.9rem;
    }
}