/* ============================================================================
   Newton's Group Blogs - Static Website Stylesheet
   Design Philosophy: Professional Medical Innovation
   ============================================================================ */

:root {
    /* Colors */
    --primary: #1e40af;
    --primary-light: #3b82f6;
    --accent: #06b6d4;
    --accent-light: #22d3ee;
    --secondary: #10b981;
    --secondary-light: #34d399;
    --background: #ffffff;
    --foreground: #1f2937;
    --muted: #f3f4f6;
    --muted-foreground: #6b7280;
    --border: #e5e7eb;
    --destructive: #dc2626;
    
    /* 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;
    
    /* Typography */
    --font-display: 'Poppins', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.23, 1, 0.32, 1);
}

/* ============================================================================
   Global Styles
   ============================================================================ */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--foreground);
    background-color: var(--background);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

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

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
}

h1 { font-size: 2.25rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
    color: var(--muted-foreground);
    margin-bottom: var(--spacing-md);
}

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

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

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

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border: 2px solid transparent;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-body);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: white;
}

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

.btn-secondary {
    background: white;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-secondary:hover {
    background: var(--primary);
    color: white;
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

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

.btn-outline-light {
    background: transparent;
    color: white;
    border: 2px solid white;
}

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

/* ============================================================================
   Header & Navigation
   ============================================================================ */

.sticky-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) 0;
}

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

.logo-icon {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 0.5rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.25rem;
}

.logo-text h1 {
    font-size: 1.25rem;
    margin: 0;
}

.logo-text p {
    font-size: 0.75rem;
    color: var(--muted-foreground);
    margin: 0;
}

.nav-menu {
    display: none;
    gap: var(--spacing-md);
}

.nav-btn {
    background: none;
    border: none;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--muted-foreground);
    cursor: pointer;
    transition: var(--transition);
    padding: var(--spacing-sm) 0;
}

.nav-btn:hover,
.nav-btn.active {
    color: var(--primary);
}

.logo-link {
    display: flex;
    align-items: center;
    text-decoration: none;
    transition: var(--transition);
}

.logo-link:hover {
    opacity: 0.8;
}

.nav-links {
    display: none;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 0.35rem;
    transition: var(--transition);
    white-space: nowrap;
}

.nav-link:hover {
    background: rgba(30, 64, 175, 0.1);
    color: var(--primary-light);
}

@media (min-width: 1024px) {
    .nav-links {
        display: flex;
    }
}

@media (max-width: 1024px) {
    .nav-links {
        display: none !important;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
}

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

.hero {
    position: relative;
    padding: var(--spacing-3xl) 0;
    overflow: hidden;
    min-height: 600px;
    display: flex;
    align-items: center;
}

.hero-background {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    z-index: 0;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to right, var(--background), rgba(255, 255, 255, 0.5), transparent);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 600px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: rgba(30, 64, 175, 0.1);
    color: var(--primary);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: 9999px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
}

.pulse {
    width: 0.5rem;
    height: 0.5rem;
    background: var(--primary);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero-title {
    font-size: 3rem;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    color: var(--foreground);
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--muted-foreground);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

@media (max-width: 768px) {
    .hero {
        min-height: 400px;
        padding: var(--spacing-2xl) 0;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
}

/* ============================================================================
   Brand Sections
   ============================================================================ */

.brand-section {
    padding: var(--spacing-3xl) 0;
}

.brand-section.reverse {
    background: rgba(243, 244, 246, 0.5);
}

.brand-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.brand-grid.reverse {
    direction: rtl;
}

.brand-grid.reverse > * {
    direction: ltr;
}

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

.brand-icon {
    width: 3rem;
    height: 3rem;
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.brand-icon.ai {
    background: rgba(6, 182, 212, 0.1);
}

.brand-icon.hospitals {
    background: rgba(16, 185, 129, 0.1);
}

.brand-icon.hms {
    background: rgba(30, 64, 175, 0.1);
}

.brand-icon.neetpg {
    background: rgba(168, 85, 247, 0.1);
}

.brand-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--muted-foreground);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.brand-content h3 {
    margin-bottom: var(--spacing-lg);
}

.brand-content p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-xl);
}

.brand-image {
    border-radius: 0.75rem;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.brand-image img {
    width: 100%;
    height: auto;
    display: block;
}

@media (max-width: 768px) {
    .brand-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .brand-grid.reverse {
        direction: ltr;
    }
}

/* ============================================================================
   Blog Section
   ============================================================================ */

.blog-section {
    padding: var(--spacing-3xl) 0;
    background: rgba(243, 244, 246, 0.5);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-header h2 {
    margin-bottom: var(--spacing-md);
}

.section-header p {
    font-size: 1.1rem;
}

.mobile-filter {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-2xl);
    overflow-x: auto;
    padding-bottom: var(--spacing-md);
}

.filter-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 2px solid var(--border);
    background: white;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

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

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

@media (min-width: 768px) {
    .mobile-filter {
        display: none;
    }
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-2xl);
}

.blog-card {
    background: white;
    border-radius: 0.75rem;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.blog-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
}

.blog-card-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
    background: var(--muted);
}

.blog-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.blog-card:hover .blog-card-image img {
    transform: scale(1.05);
}

.blog-card-content {
    padding: var(--spacing-lg);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.blog-card-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    width: fit-content;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.blog-card-badge.ai {
    background: rgba(6, 182, 212, 0.1);
    color: var(--accent);
}

.blog-card-badge.hospitals {
    background: rgba(16, 185, 129, 0.1);
    color: var(--secondary);
}

.blog-card-badge.hms {
    background: rgba(30, 64, 175, 0.1);
    color: var(--primary);
}

.blog-card-badge.neetpg {
    background: rgba(168, 85, 247, 0.1);
    color: #a855f7;
}

.blog-card h3 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.blog-card p {
    font-size: 0.95rem;
    margin-bottom: var(--spacing-md);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.blog-card-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--muted-foreground);
    margin-bottom: var(--spacing-md);
    margin-top: auto;
}

.blog-card-btn {
    width: 100%;
    padding: var(--spacing-md);
    background: white;
    border: 2px solid var(--border);
    border-radius: 0.5rem;
    color: var(--primary);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.blog-card-btn:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.hidden {
    display: none !important;
}

/* ============================================================================
   CTA Section
   ============================================================================ */

.cta-section {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: white;
    text-align: center;
}

.cta-section h2 {
    color: white;
    margin-bottom: var(--spacing-lg);
}

.cta-section p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

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

.footer {
    background: rgba(31, 41, 55, 0.05);
    border-top: 1px solid var(--border);
    padding: var(--spacing-3xl) 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-col h4 {
    margin-bottom: var(--spacing-md);
}

.footer-col p {
    font-size: 0.95rem;
}

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

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

.footer-col a {
    color: var(--muted-foreground);
    font-size: 0.95rem;
}

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

.footer-quick-links {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
    flex-wrap: wrap;
}

.footer-quick-link {
    font-size: 0.85rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(30, 64, 175, 0.05);
    border-radius: 0.35rem;
    transition: var(--transition);
}

.footer-quick-link:hover {
    background: rgba(30, 64, 175, 0.15);
    color: var(--primary-light);
}

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

.footer-bottom p {
    margin: 0;
    color: var(--muted-foreground);
}

.social-links {
    display: flex;
    gap: var(--spacing-lg);
}

.social-links a {
    color: var(--muted-foreground);
    font-size: 0.95rem;
}

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

@media (max-width: 768px) {
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .social-links {
        justify-content: center;
    }
}

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

/* ============================================================================
   Blog Post Page Styles
   ============================================================================ */

.blog-post {
    padding: var(--spacing-3xl) 0;
    min-height: 100vh;
}

.blog-post-header {
    margin-bottom: var(--spacing-3xl);
    border-bottom: 2px solid var(--border);
    padding-bottom: var(--spacing-2xl);
}

.blog-post-header h1 {
    margin-bottom: var(--spacing-lg);
    line-height: 1.3;
}

.blog-post-meta {
    display: flex;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
    color: var(--muted-foreground);
    font-size: 0.95rem;
}

.blog-post-meta span {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.blog-post-meta .category {
    background: rgba(30, 64, 175, 0.1);
    color: var(--primary);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 0.35rem;
    font-weight: 600;
}

.blog-post-content {
    max-width: 800px;
    margin: 0 auto var(--spacing-3xl);
    line-height: 1.8;
}

.blog-post-content h2 {
    margin-top: var(--spacing-2xl);
    margin-bottom: var(--spacing-lg);
    color: var(--foreground);
}

.blog-post-content p {
    margin-bottom: var(--spacing-lg);
    font-size: 1.05rem;
    color: var(--muted-foreground);
}

.blog-post-tags {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-2xl);
    padding: var(--spacing-lg);
    background: rgba(243, 244, 246, 0.5);
    border-radius: 0.5rem;
}

.tag {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-md);
    background: white;
    border: 1px solid var(--border);
    border-radius: 0.35rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary);
    transition: var(--transition);
}

.tag:hover {
    background: var(--primary);
    color: white;
}

.blog-post-nav {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    flex-wrap: wrap;
    margin-top: var(--spacing-3xl);
    padding-top: var(--spacing-2xl);
    border-top: 2px solid var(--border);
}

@media (max-width: 640px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
    
    .btn {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: 0.9rem;
    }
    
    .blog-grid {
        grid-template-columns: 1fr;
    }
    
    .blog-post-meta {
        gap: var(--spacing-md);
        font-size: 0.85rem;
    }
    
    .blog-post-nav {
        flex-direction: column;
    }
    
    .blog-post-nav .btn {
        width: 100%;
    }
}


/* ============================================================================
   Blog Feed Section
   ============================================================================ */

.blog-feed-section {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, rgba(30, 64, 175, 0.02) 0%, rgba(6, 182, 212, 0.02) 100%);
    border-top: 1px solid var(--border);
}

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

.feed-header h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
    color: var(--foreground);
}

.feed-header p {
    font-size: 1.1rem;
    color: var(--muted-foreground);
}

.feed-search-container {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
    align-items: center;
    flex-wrap: wrap;
}

.search-wrapper {
    flex: 1;
    min-width: 250px;
    position: relative;
    display: flex;
    align-items: center;
}

.feed-search-input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    padding-right: 2.5rem;
    border: 2px solid var(--border);
    border-radius: 0.5rem;
    font-family: var(--font-body);
    font-size: 1rem;
    transition: var(--transition);
}

.feed-search-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
}

.feed-search-input::placeholder {
    color: var(--muted-foreground);
}

.search-icon {
    position: absolute;
    right: var(--spacing-lg);
    pointer-events: none;
    font-size: 1.2rem;
}

.feed-results {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
    min-height: 300px;
}

.feed-loading {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--spacing-3xl);
    color: var(--muted-foreground);
    font-size: 1.1rem;
}

.feed-item {
    background: white;
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: var(--spacing-lg);
    transition: var(--transition);
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

.feed-item:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.feed-item-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(30, 64, 175, 0.1);
    color: var(--primary);
    border-radius: 0.35rem;
    font-size: 0.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    width: fit-content;
}

.feed-item-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--foreground);
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
    flex: 1;
}

.feed-item-excerpt {
    font-size: 0.9rem;
    color: var(--muted-foreground);
    margin-bottom: var(--spacing-md);
    line-height: 1.5;
}

.feed-item-meta {
    display: flex;
    gap: var(--spacing-md);
    font-size: 0.8rem;
    color: var(--muted-foreground);
    flex-wrap: wrap;
}

.feed-item-meta span {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.feed-no-results {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--spacing-3xl);
    color: var(--muted-foreground);
}

.feed-no-results h3 {
    color: var(--foreground);
    margin-bottom: var(--spacing-md);
}

.feed-footer {
    text-align: center;
    padding-top: var(--spacing-2xl);
    border-top: 1px solid var(--border);
}

@media (max-width: 768px) {
    .feed-header h2 {
        font-size: 1.5rem;
    }

    .feed-search-container {
        flex-direction: column;
    }

    .search-wrapper {
        min-width: 100%;
    }

    .feed-results {
        grid-template-columns: 1fr;
    }
}