/* AISI-Inspired Modern Design System */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
    /* AISI Color Palette - Professional & Clean */
    --primary-50: #f8fafc;
    --primary-100: #f1f5f9;
    --primary-200: #e2e8f0;
    --primary-300: #cbd5e1;
    --primary-400: #94a3b8;
    --primary-500: #64748b;
    --primary-600: #475569;
    --primary-700: #334155;
    --primary-800: #1e293b;
    --primary-900: #0f172a;
    
    /* Accent Colors */
    --accent-blue: #3b82f6;
    --accent-blue-light: #60a5fa;
    --accent-blue-dark: #1d4ed8;
    
    /* Neutral Colors */
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Semantic Colors */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    
    /* Modern Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Spacing Scale */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--gray-800);
    background: var(--white);
    font-size: 16px;
    font-weight: 400;
    letter-spacing: -0.01em;
    margin: 0;
    padding: 0;
}

/* AISI-Style Navigation */
.nav-aisi {
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 50;
}

.nav-aisi .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.nav-aisi .logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--gray-900);
    font-weight: 700;
    font-size: 20px;
}

.nav-aisi .logo-icon {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-aisi .logo-bar {
    width: 4px;
    height: 48px;
    background: var(--accent-blue);
    border-radius: 2px;
}

.nav-aisi .logo-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.nav-aisi .logo-line {
    font-size: 14px;
    font-weight: 600;
    color: var(--gray-900);
    line-height: 1.2;
    letter-spacing: -0.01em;
}

.nav-aisi .logo-line:first-child {
    font-size: 12px;
    color: var(--gray-600);
}

.nav-aisi .logo-line:last-child {
    font-size: 12px;
    color: var(--gray-600);
}

.nav-aisi .logo-image {
    height: 50px;
    width: auto;
    max-width: 300px;
    object-fit: contain;
    display: block;
}

.nav-aisi .nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-aisi .nav-link {
    padding: 8px 16px;
    color: var(--gray-600);
    text-decoration: none;
    font-weight: 500;
    border-radius: 6px;
    transition: all 0.2s ease;
}

.nav-aisi .nav-link:hover {
    color: var(--accent-blue);
    background: var(--gray-50);
}

.nav-aisi .cta-button {
    background: var(--accent-blue);
    color: white;
    padding: 10px 20px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s ease;
    margin-left: 16px;
}

.nav-aisi .cta-button:hover {
    background: var(--accent-blue-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* AISI-Style Buttons */
.btn-aisi-primary {
    background: var(--accent-blue);
    color: white;
    font-weight: 600;
    padding: 12px 24px;
    border-radius: 8px;
    transition: all 0.2s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border: none;
    font-size: 16px;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
}

.btn-aisi-primary:hover {
    background: var(--accent-blue-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-aisi-secondary {
    background: var(--white);
    color: var(--gray-700);
    font-weight: 600;
    padding: 12px 24px;
    border-radius: 8px;
    transition: all 0.2s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border: 1px solid var(--gray-300);
    font-size: 16px;
    cursor: pointer;
}

.btn-aisi-secondary:hover {
    background: var(--gray-50);
    border-color: var(--gray-400);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

/* AISI-Style Cards */
.card-aisi {
    background: var(--white);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
    overflow: hidden;
    transition: all 0.2s ease;
    min-height: 280px;
}

.card-aisi:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--gray-300);
}

/* Medium-Style Blog Cards */
.blog-list {
    display: flex;
    flex-direction: column;
    gap: 32px;
    max-width: 680px;
    margin: 0 auto;
}

.blog-card {
    background: var(--white);
    border-radius: 8px;
    transition: all 0.2s ease;
    cursor: pointer;
}

.blog-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.blog-card-content {
    padding: 24px 0;
    border-bottom: 1px solid var(--gray-200);
}

.blog-card:last-child .blog-card-content {
    border-bottom: none;
}

.blog-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.blog-date {
    font-size: 14px;
    color: var(--gray-500);
    font-weight: 400;
}

.blog-read-time {
    font-size: 14px;
    color: var(--gray-500);
    font-weight: 400;
}

.blog-title {
    font-size: 24px;
    font-weight: 700;
    line-height: 1.3;
    margin: 0 0 12px 0;
    color: var(--gray-900);
}

.blog-title a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s ease;
}

.blog-title a:hover {
    color: var(--accent-blue);
}

.blog-excerpt {
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-600);
    margin: 0 0 16px 0;
}

.blog-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.blog-author {
    display: flex;
    align-items: center;
    gap: 8px;
}

.author-avatar {
    width: 24px;
    height: 24px;
    background: var(--accent-blue);
    border-radius: 50%;
    object-fit: cover;
}

.author-name {
    font-size: 14px;
    color: var(--gray-600);
    font-weight: 500;
}

.blog-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.bookmark-btn {
    background: none;
    border: none;
    padding: 8px;
    border-radius: 4px;
    color: var(--gray-400);
    cursor: pointer;
    transition: all 0.2s ease;
}

.bookmark-btn:hover {
    background: var(--gray-100);
    color: var(--gray-600);
}

/* Medium-Style Article Layout */
.article-container {
    max-width: 680px;
    margin: 0 auto;
    padding: 0 24px;
}

.article-header {
    padding: 40px 0 32px;
    border-bottom: 1px solid var(--gray-200);
}

.article-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.author-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.author-avatar-large {
    width: 48px;
    height: 48px;
    background: var(--accent-blue);
    border-radius: 50%;
    object-fit: cover;
}

.author-details {
    display: flex;
    flex-direction: column;
}

.author-name-large {
    font-size: 16px;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 4px;
}

.article-date {
    font-size: 14px;
    color: var(--gray-500);
}

.article-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.action-btn {
    background: none;
    border: none;
    padding: 8px;
    border-radius: 4px;
    color: var(--gray-400);
    cursor: pointer;
    transition: all 0.2s ease;
}

.action-btn:hover {
    background: var(--gray-100);
    color: var(--gray-600);
}

.article-title {
    font-size: 42px;
    font-weight: 700;
    line-height: 1.2;
    color: var(--gray-900);
    margin: 0 0 16px 0;
    letter-spacing: -0.02em;
}

.article-subtitle {
    font-size: 22px;
    line-height: 1.4;
    color: var(--gray-600);
    margin: 0 0 24px 0;
    font-weight: 400;
}

.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    background: var(--gray-100);
    color: var(--gray-700);
    padding: 4px 12px;
    border-radius: 16px;
    font-size: 14px;
    font-weight: 500;
}

.article-content {
    padding: 32px 0;
    font-size: 18px;
    line-height: 1.7;
    color: var(--gray-800);
}

.content-heading {
    font-size: 28px;
    font-weight: 700;
    line-height: 1.3;
    color: var(--gray-900);
    margin: 48px 0 24px 0;
    letter-spacing: -0.01em;
}

.content-paragraph {
    margin-bottom: 24px;
}

.content-paragraph p {
    margin-bottom: 16px;
}

.content-image {
    margin: 32px 0;
    text-align: center;
}

.content-image img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

.content-two-columns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    margin: 32px 0;
}

.content-quote {
    border-left: 4px solid var(--accent-blue);
    padding-left: 24px;
    margin: 32px 0;
    font-style: italic;
    font-size: 20px;
    line-height: 1.6;
    color: var(--gray-700);
}

.content-quote cite {
    display: block;
    margin-top: 12px;
    font-size: 16px;
    color: var(--gray-500);
    font-style: normal;
}

.content-embed {
    margin: 32px 0;
    text-align: center;
}

.content-document {
    margin: 32px 0;
}

.document-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--accent-blue);
    color: white;
    padding: 12px 20px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s ease;
}

.document-link:hover {
    background: var(--accent-blue-dark);
    transform: translateY(-1px);
}

.article-footer {
    padding: 32px 0;
    border-top: 1px solid var(--gray-200);
}

/* Next Articles Section */
.next-articles {
    max-width: 680px;
    margin: 0 auto;
}

.next-articles-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 32px;
    text-align: center;
}

.next-articles-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.next-article-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 8px;
    padding: 24px;
    transition: all 0.2s ease;
    cursor: pointer;
}

.next-article-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent-blue);
}

.next-article-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.next-article-date {
    font-size: 14px;
    color: var(--gray-500);
    font-weight: 400;
}

.next-article-read-time {
    font-size: 14px;
    color: var(--gray-500);
    font-weight: 400;
}

.next-article-title {
    font-size: 18px;
    font-weight: 600;
    line-height: 1.4;
    margin: 0 0 12px 0;
    color: var(--gray-900);
}

.next-article-title a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s ease;
}

.next-article-title a:hover {
    color: var(--accent-blue);
}

.next-article-excerpt {
    font-size: 14px;
    line-height: 1.5;
    color: var(--gray-600);
    margin: 0 0 16px 0;
}

.next-article-author {
    display: flex;
    align-items: center;
    gap: 8px;
}

.next-article-avatar {
    width: 20px;
    height: 20px;
    background: var(--accent-blue);
    border-radius: 50%;
    object-fit: cover;
}

.next-article-author-name {
    font-size: 14px;
    color: var(--gray-600);
    font-weight: 500;
}

.next-articles-empty {
    grid-column: 1 / -1;
    text-align: center;
    padding: 40px;
    color: var(--gray-500);
}

/* Responsive Next Articles */
@media (max-width: 768px) {
    .next-articles-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .next-article-card {
        padding: 20px;
    }
    
    .next-articles-title {
        font-size: 20px;
        margin-bottom: 24px;
    }
}

/* Social Cards - Square layout with icon on top, name below */
.social-card {
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 8px !important;
    padding: 20px !important;
    background: var(--white) !important;
    border: 2px solid var(--gray-200) !important;
    border-radius: 12px !important;
    color: var(--gray-700) !important;
    text-decoration: none !important;
    font-weight: 600 !important;
    transition: all 0.2s ease !important;
    width: 120px !important;
    height: 120px !important;
    text-align: center !important;
    flex-shrink: 0 !important;
}

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

.social-card .social-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
}

.social-card .social-icon svg {
    width: 24px;
    height: 24px;
}

.social-card .social-name {
    font-size: 14px;
    font-weight: 600;
    line-height: 1.2;
    text-align: center;
}

/* Ensure parent container displays cards horizontally */
.flex.flex-wrap.justify-start.gap-4 {
    display: flex !important;
    flex-wrap: wrap !important;
    justify-content: flex-start !important;
    gap: 1rem !important;
    align-items: flex-start !important;
}

.article-actions-large {
    display: flex;
    gap: 16px;
}

.action-btn-large {
    display: flex;
    align-items: center;
    gap: 8px;
    background: none;
    border: 1px solid var(--gray-300);
    padding: 12px 20px;
    border-radius: 8px;
    color: var(--gray-600);
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 500;
}

.action-btn-large:hover {
    background: var(--gray-50);
    border-color: var(--gray-400);
}

/* Responsive Design for Articles */
@media (max-width: 768px) {
    .article-container {
        padding: 0 16px;
    }
    
    .article-title {
        font-size: 32px;
    }
    
    .article-subtitle {
        font-size: 20px;
    }
    
    .content-heading {
        font-size: 24px;
    }
    
    .content-two-columns {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .article-actions-large {
        flex-direction: column;
    }
}

/* AISI-Style Typography */
.heading-aisi-hero {
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.02em;
    color: var(--gray-900);
    margin: 0;
}

.heading-aisi-xl {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.025em;
    color: var(--gray-900);
    margin: 0;
}

.heading-aisi-lg {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 600;
    line-height: 1.3;
    letter-spacing: -0.025em;
    color: var(--gray-900);
    margin: 0;
}

.heading-aisi-md {
    font-size: clamp(1.5rem, 4vw, 2rem);
    font-weight: 600;
    line-height: 1.4;
    letter-spacing: -0.025em;
    color: var(--gray-900);
    margin: 0;
}

.heading-aisi-sm {
    font-size: clamp(1.25rem, 3vw, 1.5rem);
    font-weight: 600;
    line-height: 1.4;
    color: var(--gray-900);
    margin: 0;
}

/* AISI-Style Sections */
.section-aisi {
    padding: 120px 0;
}

.section-aisi-hero {
    padding: 160px 0 120px;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
}

.container-aisi {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* AISI-Style Hero */
.hero-aisi {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-aisi .subtitle {
    font-size: 20px;
    color: var(--gray-600);
    margin: 24px 0 48px;
    line-height: 1.6;
}

.hero-aisi .cta-group {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* AISI-Style Grid */
.grid-aisi {
    display: grid;
    gap: 40px;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.grid-aisi-2 {
    display: grid;
    gap: 48px;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
}

/* AISI-Style Feature Cards */
.feature-card {
    background: var(--white);
    border-radius: 12px;
    padding: 32px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
    transition: all 0.2s ease;
}

.feature-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--gray-300);
}

.feature-card .icon {
    width: 48px;
    height: 48px;
    background: var(--accent-blue);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}

.feature-card .icon svg {
    width: 24px;
    height: 24px;
    color: white;
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--gray-900);
    margin: 0 0 16px;
}

.feature-card p {
    color: var(--gray-600);
    line-height: 1.6;
    margin: 0;
}

/* AISI-Style Stats */
.stats-aisi {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 32px;
    margin: 80px 0;
}

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

.stat-number {
    font-size: 48px;
    font-weight: 800;
    color: var(--accent-blue);
    margin: 0;
}

.stat-label {
    font-size: 16px;
    color: var(--gray-600);
    margin: 8px 0 0;
}

/* AISI-Style Footer */
.footer-aisi {
    background: var(--gray-900);
    color: var(--white);
    padding: 80px 0 40px;
}

.footer-aisi .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.footer-aisi .grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 48px;
    margin-bottom: 48px;
}

.footer-aisi .brand {
    max-width: 400px;
}

.footer-aisi .brand h3 {
    font-size: 24px;
    font-weight: 700;
    margin: 0 0 16px;
}

.footer-aisi .brand p {
    color: var(--gray-300);
    line-height: 1.6;
    margin: 0 0 24px;
}

.footer-aisi .links h4 {
    font-size: 16px;
    font-weight: 600;
    margin: 0 0 16px;
}

.footer-aisi .links ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-aisi .links li {
    margin-bottom: 8px;
}

.footer-aisi .links a {
    color: var(--gray-300);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-aisi .links a:hover {
    color: var(--white);
}

.footer-aisi .bottom {
    border-top: 1px solid var(--gray-700);
    padding-top: 32px;
    text-align: center;
    color: var(--gray-400);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-aisi .nav-links {
        display: none;
    }
    
    .nav-aisi .mobile-menu {
        display: block;
    }
}

/* Hide mobile menu on desktop */
@media (min-width: 769px) {
    .nav-aisi .mobile-menu {
        display: none !important;
    }
    
    .nav-aisi .mobile-menu-button {
        display: none !important;
    }
}

/* Show mobile menu button on mobile */
@media (max-width: 768px) {
    .nav-aisi .mobile-menu-button {
        display: block;
    }
}
    
    .section-aisi {
        padding: 80px 0;
    }
    
    .section-aisi-hero {
        padding: 120px 0 80px;
    }
    
    .container-aisi {
        padding: 0 16px;
    }
    
    .hero-aisi .cta-group {
        flex-direction: column;
        align-items: center;
    }
    
    .btn-aisi-primary, .btn-aisi-secondary {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
    
    .grid-aisi {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .grid-aisi-2 {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .stats-aisi {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
        margin: 60px 0;
    }
    
    .feature-card {
        padding: 32px;
    }


@media (max-width: 480px) {
    .section-aisi {
        padding: 60px 0;
    }
    
    .section-aisi-hero {
        padding: 100px 0 60px;
    }
    
    .container-aisi {
        padding: 0 12px;
    }
    
    .stats-aisi {
        grid-template-columns: 1fr;
        gap: 20px;
        margin: 40px 0;
    }
    
    .feature-card {
        padding: 24px;
    }
}

/* Animations */
.animate-fade-in {
    animation: fadeIn 0.6s ease-out;
}

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

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

@keyframes slideUp {
    from { 
        opacity: 0; 
        transform: translateY(30px); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0); 
    }
}

/* Utility Classes */
.text-gradient {
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-blue-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.bg-gradient-aisi {
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
}

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

.shadow-aisi-lg {
    box-shadow: var(--shadow-lg);
}