/* ========================================
   BISP 8171 Website - Global Styles
   White Theme with Modern Aesthetics
   ======================================== */

/* Google Fonts Import */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Outfit:wght@400;500;600;700;800&display=swap');

/* CSS Variables */
:root {
    /* Primary Colors */
    --primary: #2563eb;
    --primary-light: #3b82f6;
    --primary-dark: #1d4ed8;
    --primary-gradient: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);

    /* Secondary Colors */
    --secondary: #10b981;
    --secondary-light: #34d399;
    --secondary-dark: #059669;

    /* Accent Colors */
    --accent: #8b5cf6;
    --accent-light: #a78bfa;

    /* Backgrounds */
    --bg-white: #ffffff;
    --bg-light: #f8fafc;
    --bg-alt: #f1f5f9;
    --bg-card: #ffffff;

    /* Text Colors */
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --text-white: #ffffff;

    /* Borders & Shadows */
    --border-light: #e2e8f0;
    --border-medium: #cbd5e1;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 40px rgba(37, 99, 235, 0.15);

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

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

    /* Container Width */
    --container-max: 1200px;
    --content-max: 800px;
}

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

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-light);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
}

/* Selection */
::selection {
    background: var(--primary);
    color: var(--text-white);
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 10px;
}

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

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

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-light);
}

/* ========================================
   Typography
   ======================================== */

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

h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(1.5rem, 4vw, 2rem);
    letter-spacing: -0.01em;
}

h3 {
    font-size: clamp(1.25rem, 3vw, 1.5rem);
}

h4 {
    font-size: 1.25rem;
}

p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

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

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

strong {
    font-weight: 600;
    color: var(--text-primary);
}

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

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

.content-wrapper {
    max-width: var(--content-max);
    margin: 0 auto;
}

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

.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 4px;
    background: var(--primary-gradient);
    z-index: 9999;
    transition: width 100ms linear;
}

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

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.navbar-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.navbar-logo {
    width: 45px;
    height: 45px;
    background: var(--primary-gradient);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    font-weight: 800;
    font-size: 1.1rem;
    font-family: 'Outfit', sans-serif;
    box-shadow: var(--shadow-md);
}

.navbar-title {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    font-size: 1.3rem;
    color: var(--text-primary);
}

.navbar-title span {
    color: var(--primary);
}

.navbar-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
    list-style: none;
}

.navbar-link {
    font-weight: 500;
    color: var(--text-secondary);
    padding: var(--spacing-sm) 0;
    position: relative;
    transition: color var(--transition-fast);
}

.navbar-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-gradient);
    transition: width var(--transition-normal);
}

.navbar-link:hover {
    color: var(--primary);
}

.navbar-link:hover::after {
    width: 100%;
}

.navbar-search {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--bg-alt);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-full);
    padding: var(--spacing-sm) var(--spacing-md);
    transition: all var(--transition-fast);
}

.navbar-search:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.navbar-search input {
    border: none;
    background: transparent;
    outline: none;
    font-size: 0.9rem;
    width: 150px;
    color: var(--text-primary);
}

.navbar-search input::placeholder {
    color: var(--text-muted);
}

.navbar-search svg {
    width: 18px;
    height: 18px;
    color: var(--text-muted);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.mobile-menu-btn svg {
    width: 24px;
    height: 24px;
    color: var(--text-primary);
}

/* ========================================
   Hero Section
   ======================================== */

.hero {
    padding: 140px 0 80px;
    background: linear-gradient(180deg, var(--bg-white) 0%, var(--bg-light) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 20s infinite ease-in-out;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(16, 185, 129, 0.06) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 15s infinite ease-in-out reverse;
}

@keyframes float {

    0%,
    100% {
        transform: translate(0, 0);
    }

    50% {
        transform: translate(30px, -30px);
    }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
    border: 1px solid rgba(37, 99, 235, 0.2);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--primary);
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.6s ease;
}

.hero-badge svg {
    width: 16px;
    height: 16px;
}

.hero-title {
    font-size: clamp(2.2rem, 6vw, 3.5rem);
    font-weight: 800;
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 0.6s ease 0.1s backwards;
}

.hero-description {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto var(--spacing-xl);
    animation: fadeInUp 0.6s ease 0.2s backwards;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-2xl);
    flex-wrap: wrap;
    animation: fadeInUp 0.6s ease 0.3s backwards;
}

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

.hero-stat-value {
    font-family: 'Outfit', sans-serif;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
}

.hero-stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
   Breadcrumb
   ======================================== */

.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) 0;
    font-size: 0.9rem;
}

.breadcrumb-item {
    color: var(--text-muted);
}

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

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

.breadcrumb-separator {
    color: var(--text-muted);
}

/* ========================================
   Main Content Layout
   ======================================== */

.main-content {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: var(--spacing-2xl);
    padding: var(--spacing-2xl) 0;
    max-width: var(--container-max);
    margin: 0 auto;
    padding-left: var(--spacing-lg);
    padding-right: var(--spacing-lg);
}

/* ========================================
   Table of Contents Sidebar
   ======================================== */

.toc-sidebar {
    position: sticky;
    top: 90px;
    height: fit-content;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
}

.toc-card {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-light);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.toc-title {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.toc-title svg {
    width: 16px;
    height: 16px;
}

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

.toc-item {
    margin-bottom: var(--spacing-xs);
}

.toc-link {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.9rem;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    border-left: 2px solid transparent;
    transition: all var(--transition-fast);
}

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

.toc-link.active {
    background: linear-gradient(90deg, rgba(37, 99, 235, 0.1) 0%, transparent 100%);
    color: var(--primary);
    border-left-color: var(--primary);
    font-weight: 500;
}

.toc-link.toc-sub {
    padding-left: var(--spacing-xl);
    font-size: 0.85rem;
}

/* ========================================
   Article Content
   ======================================== */

.article {
    background: var(--bg-white);
    border-radius: var(--radius-2xl);
    border: 1px solid var(--border-light);
    padding: var(--spacing-2xl) var(--spacing-3xl);
    box-shadow: var(--shadow-sm);
    overflow-x: hidden;
    max-width: 100%;
    box-sizing: border-box;
}

.article-header {
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--border-light);
}

.article-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    margin-top: var(--spacing-md);
}

.article-meta-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.9rem;
    color: var(--text-muted);
}

.article-meta-item svg {
    width: 16px;
    height: 16px;
}

.article-content h2 {
    margin-top: var(--spacing-2xl);
    margin-bottom: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-light);
    scroll-margin-top: 100px;
}

.article-content h2:first-of-type {
    border-top: none;
    padding-top: 0;
    margin-top: 0;
}

.article-content h3 {
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    scroll-margin-top: 100px;
}

.article-content p {
    margin-bottom: var(--spacing-md);
    font-size: 1.05rem;
    line-height: 1.8;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.article-content p strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* Use this class explicitly for block-quote style highlights */
.highlight-block {
    display: block;
    background: linear-gradient(90deg, rgba(37, 99, 235, 0.08) 0%, transparent 100%);
    padding: var(--spacing-md) var(--spacing-lg);
    border-left: 4px solid var(--primary);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    margin: var(--spacing-lg) 0;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 1.05rem;
    line-height: 1.8;
}

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

.article-content li {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
    line-height: 1.7;
}

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

/* Numbered Steps */
.article-content ol {
    counter-reset: step-counter;
    list-style: none;
    padding-left: 0;
}

.article-content ol li {
    position: relative;
    padding-left: 50px;
    margin-bottom: var(--spacing-md);
    counter-increment: step-counter;
}

.article-content ol li::before {
    content: counter(step-counter);
    position: absolute;
    left: 0;
    top: 0;
    width: 32px;
    height: 32px;
    background: var(--primary-gradient);
    color: var(--text-white);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.9rem;
}

/* Bullet Points */
.article-content ul {
    list-style: none;
    padding-left: 0;
}

.article-content ul li {
    position: relative;
    padding-left: 28px;
}

.article-content ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 8px;
    height: 8px;
    background: var(--secondary);
    border-radius: var(--radius-full);
}

/* ========================================
   Tables
   ======================================== */

.table-wrapper {
    overflow-x: auto;
    margin: var(--spacing-xl) 0;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
}

.article-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    font-size: 0.95rem;
}

.article-table thead {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--text-white);
}

.article-table th {
    padding: var(--spacing-md) var(--spacing-lg);
    text-align: left;
    font-weight: 600;
    white-space: nowrap;
}

/* Sticky first column */
.article-table th:first-child,
.article-table td:first-child {
    position: sticky;
    left: 0;
    min-width: 180px;
    z-index: 1;
}

.article-table th:first-child {
    background: var(--primary-dark);
    z-index: 2;
}

.article-table td:first-child {
    background: var(--bg-white);
    font-weight: 500;
    color: var(--text-primary);
    border-right: 1px solid var(--border-light);
}

.article-table tbody tr:hover td:first-child {
    background: var(--bg-alt);
}

.article-table td {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--border-light);
    color: var(--text-secondary);
}

.article-table tbody tr:hover {
    background: var(--bg-alt);
}

.article-table tbody tr:last-child td {
    border-bottom: none;
}

.table-amount {
    font-weight: 600;
    color: var(--secondary);
}

/* ========================================
   Info Cards
   ======================================== */

.info-card {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
    border: 1px solid rgba(37, 99, 235, 0.15);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
}

.info-card.warning {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.08) 0%, rgba(251, 191, 36, 0.05) 100%);
    border-color: rgba(245, 158, 11, 0.3);
}

.info-card-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
}

.info-card-title svg {
    width: 20px;
    height: 20px;
}

/* ========================================
   Author Section
   ======================================== */

.author-section {
    background: linear-gradient(135deg, var(--bg-white) 0%, var(--bg-alt) 100%);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-2xl);
    margin: var(--spacing-2xl) 0;
    position: relative;
    overflow: hidden;
}

.author-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
}

.author-section::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.06) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.author-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    position: relative;
    z-index: 1;
}

.author-avatar {
    width: 80px;
    height: 80px;
    background: var(--primary-gradient);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Outfit', sans-serif;
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-white);
    box-shadow: var(--shadow-lg);
    flex-shrink: 0;
}

.author-info {
    flex: 1;
}

.author-label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.author-name {
    font-family: 'Outfit', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.author-title {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
}

.author-bio {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
    position: relative;
    z-index: 1;
    font-size: 1rem;
}

.author-stats {
    display: flex;
    gap: var(--spacing-xl);
    padding: var(--spacing-lg) 0;
    border-top: 1px solid var(--border-light);
    border-bottom: 1px solid var(--border-light);
    margin-bottom: var(--spacing-lg);
    position: relative;
    z-index: 1;
}

.author-stat {
    text-align: center;
}

.author-stat-value {
    font-family: 'Outfit', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.author-stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
}

.author-social {
    display: flex;
    gap: var(--spacing-sm);
    position: relative;
    z-index: 1;
}

.author-social-link {
    width: 40px;
    height: 40px;
    background: var(--bg-white);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.author-social-link:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: var(--text-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.author-social-link svg {
    width: 18px;
    height: 18px;
}

/* ========================================
   Share Section
   ======================================== */

.share-section {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-light);
}

.share-label {
    font-weight: 500;
    color: var(--text-secondary);
}

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

.share-btn {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-light);
    background: var(--bg-white);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.share-btn svg {
    width: 18px;
    height: 18px;
}

/* ========================================
   Related Posts Section
   ======================================== */

.related-section {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-white);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-title {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    color: var(--text-muted);
    font-size: 1.1rem;
}

.posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
}

.post-card {
    background: var(--bg-white);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.post-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.post-card-image {
    width: 100%;
    height: 180px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    font-size: 3rem;
}

.post-card-content {
    padding: var(--spacing-lg);
}

.post-card-category {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--primary);
    background: rgba(37, 99, 235, 0.1);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-sm);
}

.post-card-title {
    font-size: 1.15rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    transition: color var(--transition-fast);
}

.post-card:hover .post-card-title {
    color: var(--primary);
}

.post-card-excerpt {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.post-card-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--primary);
}

.post-card-link svg {
    width: 16px;
    height: 16px;
    transition: transform var(--transition-fast);
}

.post-card:hover .post-card-link svg {
    transform: translateX(4px);
}

/* ========================================
   Newsletter Section
   ======================================== */

.newsletter-section {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    position: relative;
    overflow: hidden;
}

.newsletter-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.newsletter-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.newsletter-title {
    color: var(--text-white);
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

.newsletter-text {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-xl);
    font-size: 1.1rem;
}

.newsletter-form {
    display: flex;
    gap: var(--spacing-sm);
    max-width: 450px;
    margin: 0 auto;
}

.newsletter-input {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-lg);
    border: 2px solid transparent;
    border-radius: var(--radius-full);
    font-size: 1rem;
    outline: none;
    transition: all var(--transition-fast);
}

.newsletter-input:focus {
    border-color: var(--secondary);
}

.newsletter-btn {
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--text-white);
    color: var(--primary);
    border: none;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.newsletter-btn:hover {
    background: var(--secondary);
    color: var(--text-white);
    transform: translateY(-2px);
}

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

.footer {
    background: var(--text-primary);
    color: var(--text-white);
    padding: var(--spacing-3xl) 0 0;
}

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

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

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.footer-logo-icon {
    width: 45px;
    height: 45px;
    background: var(--primary-gradient);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    font-weight: 800;
    font-family: 'Outfit', sans-serif;
}

.footer-logo-text {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    font-size: 1.3rem;
}

.footer-description {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.95rem;
    line-height: 1.7;
}

.footer-column h4 {
    color: var(--text-white);
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
}

.footer-links {
    list-style: none;
}

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

.footer-links a {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.95rem;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary-light);
}

.footer-social {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.social-link {
    width: 38px;
    height: 38px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: var(--primary);
    transform: translateY(-3px);
}

.social-link svg {
    width: 18px;
    height: 18px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--spacing-lg) 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-copyright {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
}

.footer-legal {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-legal a {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
}

.footer-legal a:hover {
    color: var(--primary-light);
}

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

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-gradient);
    color: var(--text-white);
    border: none;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-lg);
    z-index: 999;
}

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

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.back-to-top svg {
    width: 24px;
    height: 24px;
}

/* ========================================
   Legal Pages Styles
   ======================================== */

.legal-page {
    padding: 120px 0 var(--spacing-3xl);
}

.legal-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.legal-card {
    background: var(--bg-white);
    border-radius: var(--radius-2xl);
    border: 1px solid var(--border-light);
    padding: var(--spacing-2xl) var(--spacing-3xl);
    box-shadow: var(--shadow-sm);
}

.legal-title {
    margin-bottom: var(--spacing-md);
}

.legal-updated {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border-light);
}

.legal-content h2 {
    font-size: 1.3rem;
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.legal-content h2:first-of-type {
    margin-top: 0;
}

.legal-content p {
    margin-bottom: var(--spacing-md);
}

.legal-content ul {
    margin: var(--spacing-md) 0;
    padding-left: var(--spacing-xl);
}

.legal-content li {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

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

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
}

.contact-info-card {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    color: var(--text-white);
}

.contact-info-title {
    color: var(--text-white);
    margin-bottom: var(--spacing-lg);
}

.contact-info-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.contact-info-icon {
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-info-icon svg {
    width: 22px;
    height: 22px;
}

.contact-info-label {
    font-size: 0.85rem;
    opacity: 0.8;
    margin-bottom: var(--spacing-xs);
}

.contact-info-value {
    font-weight: 600;
    font-size: 1.1rem;
}

.contact-form-card {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-light);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-sm);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: inherit;
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

.form-submit {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--primary-gradient);
    color: var(--text-white);
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.form-submit:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* ========================================
   Quick Actions Bar
   ======================================== */

.quick-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    margin: var(--spacing-xl) 0;
    padding: var(--spacing-lg);
    background: var(--bg-alt);
    border-radius: var(--radius-lg);
}

.quick-action-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--bg-white);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.quick-action-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.quick-action-btn svg {
    width: 18px;
    height: 18px;
}

/* ========================================
   Responsive Design
   ======================================== */

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

    .toc-sidebar {
        display: none;
    }

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

@media (max-width: 768px) {
    .navbar-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-white);
        flex-direction: column;
        padding: var(--spacing-lg);
        border-top: 1px solid var(--border-light);
        box-shadow: var(--shadow-lg);
    }

    .navbar-menu.active {
        display: flex;
    }

    .navbar-search {
        width: 100%;
    }

    .navbar-search input {
        width: 100%;
    }

    .mobile-menu-btn {
        display: block;
    }

    .hero {
        padding: 120px 0 60px;
    }

    .hero-stats {
        gap: var(--spacing-lg);
    }

    .hero-stat-value {
        font-size: 2rem;
    }

    .article {
        padding: var(--spacing-lg);
    }

    .article-content ol li {
        padding-left: 40px;
    }

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

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .footer-legal {
        flex-wrap: wrap;
        justify-content: center;
    }

    .share-section {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 600px) {
    .navbar-container {
        flex-wrap: wrap;
        height: auto;
        padding: var(--spacing-sm) var(--spacing-md);
        gap: var(--spacing-sm);
    }

    .navbar-brand {
        flex: 1 1 auto;
        min-width: 0;
    }

    .navbar-logo {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    .navbar-title {
        font-size: 1.1rem;
    }

    .navbar-search {
        order: 3;
        flex: 1 1 100%;
        width: 100%;
        margin-top: var(--spacing-xs);
    }

    .navbar-search input {
        min-width: 0;
    }

    .mobile-menu-btn {
        order: 2;
    }

    .main-content {
        padding-left: var(--spacing-md);
        padding-right: var(--spacing-md);
    }

    .article-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }

    .hero-stats {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-md);
    }

    .quick-actions {
        padding: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    html {
        font-size: 15px;
    }

    .container {
        padding: 0 var(--spacing-md);
    }

    .hero-title {
        font-size: 1.8rem;
    }

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

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

    .quick-action-btn {
        width: 100%;
        justify-content: center;
    }

    .breadcrumb {
        flex-wrap: wrap;
        font-size: 0.8rem;
    }

    .article-table th,
    .article-table td {
        padding: var(--spacing-sm);
        font-size: 0.85rem;
    }

    .article-table th:first-child,
    .article-table td:first-child {
        min-width: 120px;
    }

    .article {
        padding: var(--spacing-md);
        border-radius: var(--radius-lg);
    }

    /* Article content mobile fixes */
    .article-content {
        overflow-x: hidden;
        word-wrap: break-word;
        overflow-wrap: break-word;
    }

    .article-content h1 {
        font-size: 1.5rem;
        word-wrap: break-word;
    }

    .article-content h2 {
        font-size: 1.25rem;
        word-wrap: break-word;
    }

    .article-content p {
        font-size: 0.95rem;
    }

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

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

    .table-wrapper {
        max-width: 100%;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .info-card {
        padding: var(--spacing-md);
    }

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

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

    .footer-brand {
        max-width: 100%;
    }

    .footer-logo {
        justify-content: center;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
    }
}

/* ========================================
   Author Section
   ======================================== */

.author-section {
    margin-top: var(--spacing-2xl);
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
}

.author-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.author-avatar {
    width: 64px;
    height: 64px;
    background: var(--primary-gradient);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    font-weight: 700;
    font-size: 1.4rem;
    font-family: 'Outfit', sans-serif;
    flex-shrink: 0;
}

.author-info {
    flex: 1;
}

.author-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.author-name {
    font-size: 1.3rem;
    margin-bottom: 0;
    color: var(--text-primary);
}

.author-title {
    font-size: 0.9rem;
    color: var(--primary);
    margin: 0;
    font-weight: 500;
}

.author-bio {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
}

.author-stats {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.author-stat {
    text-align: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-white);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-light);
    min-width: 90px;
}

.author-stat-value {
    font-family: 'Outfit', sans-serif;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary);
}

.author-stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
}

/* Author Section Mobile Responsive */
@media (max-width: 768px) {
    .author-section {
        padding: var(--spacing-lg);
    }

    .author-header {
        flex-direction: column;
        text-align: center;
    }

    .author-avatar {
        width: 56px;
        height: 56px;
        font-size: 1.2rem;
    }

    .author-info {
        text-align: center;
    }

    .author-name {
        font-size: 1.1rem;
    }

    .author-stats {
        justify-content: center;
    }

    .author-stat {
        min-width: 80px;
        padding: var(--spacing-xs) var(--spacing-sm);
    }

    .author-stat-value {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .author-section {
        padding: var(--spacing-md);
    }

    .author-bio {
        font-size: 0.9rem;
    }

    .author-stats {
        gap: var(--spacing-sm);
    }

    .author-stat {
        flex: 1;
        min-width: 70px;
    }
}

/* ========================================
   Animation Utilities
   ======================================== */

.fade-in {
    animation: fadeIn 0.6s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.slide-up {
    animation: slideUp 0.6s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
   Accessibility
   ======================================== */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

*:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* ========================================
   Print Styles
   ======================================== */

@media print {

    .navbar,
    .toc-sidebar,
    .newsletter-section,
    .back-to-top,
    .share-section {
        display: none !important;
    }

    .main-content {
        grid-template-columns: 1fr;
    }

    .article {
        border: none;
        box-shadow: none;
    }
}