/* ============================================
   LC7.site - Laboratory Course Pakistan
   Complete Responsive Stylesheet
   ============================================ */

/* CSS Variables */
:root {
    --primary-color: #1a5f7a;
    --secondary-color: #159895;
    --accent-color: #57c5b6;
    --dark-color: #002b5b;
    --light-color: #f8f9fa;
    --white: #ffffff;
    --text-color: #333333;
    --text-light: #666666;
    --border-color: #e0e0e0;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
    --shadow-hover: 0 5px 20px rgba(0,0,0,0.15);
    --transition: all 0.3s ease;
    --font-primary: 'Segoe UI', 'Roboto', 'Noto Nastaliq Urdu', sans-serif;
    --font-heading: 'Poppins', 'Segoe UI', sans-serif;
    --border-radius: 8px;
    --max-width: 1200px;
}

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

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

body {
    font-family: var(--font-primary);
    line-height: 1.8;
    color: var(--text-color);
    background-color: var(--light-color);
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 1rem;
    color: var(--dark-color);
}

h1 { font-size: clamp(1.8rem, 4vw, 2.5rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.5rem); }
h4 { font-size: clamp(1.1rem, 2.5vw, 1.25rem); }

p {
    margin-bottom: 1rem;
    font-size: 1rem;
    line-height: 1.9;
}

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

a:hover {
    color: var(--secondary-color);
}

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

/* Container */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 15px;
}

/* ============================================
   HEADER STYLES
   ============================================ */
.site-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--dark-color) 100%);
    color: var(--white);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow);
}

.header-top {
    background: var(--dark-color);
    padding: 8px 0;
    font-size: 0.875rem;
}

.header-top-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.header-contact a {
    color: var(--white);
    margin-right: 20px;
}

.header-contact a:hover {
    color: var(--accent-color);
}

.social-links a {
    color: var(--white);
    margin-left: 15px;
    font-size: 1.1rem;
}

.social-links a:hover {
    color: var(--accent-color);
    transform: scale(1.1);
}

.header-main {
    padding: 15px 0;
}

.header-main-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Logo */
.site-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.site-logo a {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--white);
}

.logo-img {
    width: 50px;
    height: 50px;
    object-fit: contain;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.logo-img:hover {
    transform: rotate(360deg);
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: 1px;
}

.logo-tagline {
    font-size: 0.75rem;
    opacity: 0.9;
    display: block;
}

/* Navigation */
.main-nav ul {
    display: flex;
    list-style: none;
    gap: 5px;
}

.main-nav a {
    color: var(--white);
    padding: 10px 18px;
    border-radius: var(--border-radius);
    font-weight: 500;
    display: block;
    transition: var(--transition);
}

.main-nav a:hover,
.main-nav a.active {
    background: rgba(255,255,255,0.2);
    color: var(--accent-color);
}

/* Dropdown Menu */
.nav-item {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--white);
    min-width: 220px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-hover);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
    z-index: 1000;
}

.nav-item:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu a {
    color: var(--text-color);
    padding: 12px 20px;
    border-bottom: 1px solid var(--border-color);
}

.dropdown-menu a:last-child {
    border-bottom: none;
}

.dropdown-menu a:hover {
    background: var(--light-color);
    color: var(--primary-color);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--white);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 10px;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 50%, var(--accent-color) 100%);
    color: var(--white);
    padding: 60px 0;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="40" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="2"/></svg>');
    background-size: 100px 100px;
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3rem);
    margin-bottom: 1rem;
    color: var(--white);
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.hero-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    margin-bottom: 2rem;
    opacity: 0.95;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background: var(--accent-color);
    color: var(--white);
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border-color: var(--white);
}

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

/* ============================================
   MAIN CONTENT AREA
   ============================================ */
.main-content {
    padding: 50px 0;
}

.content-wrapper {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 30px;
}

/* Article Styles */
.article-content {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--shadow);
}

.article-header {
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
}

.article-meta {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    font-size: 0.875rem;
    color: var(--text-light);
    margin-top: 10px;
}

.article-meta span {
    display: flex;
    align-items: center;
    gap: 5px;
}

.article-body {
    font-size: 1.05rem;
    line-height: 1.9;
}

.article-body h2 {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.article-body h3 {
    margin-top: 1.5rem;
    color: var(--primary-color);
}

.article-body ul, .article-body ol {
    margin: 1rem 0 1rem 2rem;
}

.article-body li {
    margin-bottom: 0.5rem;
}

/* Tables */
.table-responsive {
    overflow-x: auto;
    margin: 1.5rem 0;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.data-table th {
    background: var(--primary-color);
    color: var(--white);
    padding: 15px;
    text-align: left;
    font-weight: 600;
}

.data-table td {
    padding: 12px 15px;
    border-bottom: 1px solid var(--border-color);
}

.data-table tr:nth-child(even) {
    background: var(--light-color);
}

.data-table tr:hover {
    background: rgba(26, 95, 122, 0.05);
}

/* ============================================
   SIDEBAR
   ============================================ */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.sidebar-widget {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 25px;
    box-shadow: var(--shadow);
}

.widget-title {
    font-size: 1.1rem;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 3px solid var(--primary-color);
    color: var(--dark-color);
}

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

.widget-list li {
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
}

.widget-list li:last-child {
    border-bottom: none;
}

.widget-list a {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.widget-list a:hover {
    color: var(--primary-color);
    padding-left: 5px;
}

/* ============================================
   CARDS GRID
   ============================================ */
.cards-section {
    padding: 50px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 40px;
}

.section-title h2 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    color: var(--dark-color);
}

.section-title p {
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
}

.card {
    background: var(--white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

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

.card-content {
    padding: 20px;
}

.card-category {
    display: inline-block;
    background: var(--accent-color);
    color: var(--white);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.card-title {
    font-size: 1.1rem;
    margin-bottom: 10px;
    line-height: 1.4;
}

.card-title a {
    color: var(--dark-color);
}

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

.card-excerpt {
    color: var(--text-light);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 15px;
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
    font-size: 0.85rem;
    color: var(--text-light);
}

.read-more {
    color: var(--primary-color);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.read-more:hover {
    gap: 10px;
}

/* ============================================
   FEATURES SECTION
   ============================================ */
.features-section {
    background: var(--white);
    padding: 60px 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-box {
    text-align: center;
    padding: 30px 20px;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.feature-box:hover {
    background: var(--light-color);
    transform: translateY(-5px);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 2rem;
    color: var(--white);
}

.feature-title {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.feature-text {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* ============================================
   STATS SECTION
   ============================================ */
.stats-section {
    background: linear-gradient(135deg, var(--dark-color), var(--primary-color));
    padding: 50px 0;
    color: var(--white);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    text-align: center;
}

.stat-item {
    padding: 20px;
}

.stat-number {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    display: block;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 1rem;
    opacity: 0.9;
}

/* ============================================
   BREADCRUMB
   ============================================ */
.breadcrumb-nav {
    background: var(--white);
    padding: 15px 0;
    border-bottom: 1px solid var(--border-color);
}

.breadcrumb {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    font-size: 0.9rem;
}

.breadcrumb-item + .breadcrumb-item::before {
    content: '›';
    padding-right: 10px;
    color: var(--text-light);
}

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

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

/* ============================================
   FOOTER STYLES
   ============================================ */
.site-footer {
    background: var(--dark-color);
    color: var(--white);
}

.footer-main {
    padding: 60px 0 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.footer-widget h3 {
    color: var(--white);
    font-size: 1.2rem;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary-color);
}

.footer-about p {
    color: rgba(255,255,255,0.8);
    line-height: 1.8;
}

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

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: rgba(255,255,255,0.8);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--accent-color);
    padding-left: 5px;
}

.footer-contact p {
    color: rgba(255,255,255,0.8);
    margin-bottom: 15px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.footer-social {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.1rem;
    transition: var(--transition);
}

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

.footer-bottom {
    background: rgba(0,0,0,0.3);
    padding: 20px 0;
    text-align: center;
}

.footer-bottom p {
    color: rgba(255,255,255,0.7);
    font-size: 0.9rem;
    margin: 0;
}

/* ============================================
   FORMS
   ============================================ */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--dark-color);
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(26, 95, 122, 0.1);
}

textarea.form-control {
    min-height: 150px;
    resize: vertical;
}

.btn-submit {
    background: var(--primary-color);
    color: var(--white);
    padding: 15px 40px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

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

/* ============================================
   AD CONTAINERS
   ============================================ */
.ad-container {
    margin: 25px 0;
    text-align: center;
    background: var(--light-color);
    border-radius: var(--border-radius);
    padding: 10px;
    min-height: 100px;
}

.ad-container::before {
    content: 'Advertisement';
    font-size: 0.7rem;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.py-1 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
.py-2 { padding-top: 1rem; padding-bottom: 1rem; }
.py-3 { padding-top: 1.5rem; padding-bottom: 1.5rem; }
.py-4 { padding-top: 2rem; padding-bottom: 2rem; }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

.highlight-box {
    background: linear-gradient(135deg, rgba(26, 95, 122, 0.05), rgba(21, 152, 149, 0.05));
    border-left: 4px solid var(--primary-color);
    padding: 20px;
    margin: 20px 0;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.alert {
    padding: 15px 20px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
}

.alert-info {
    background: #e3f2fd;
    color: #1565c0;
    border: 1px solid #90caf9;
}

.alert-success {
    background: #e8f5e9;
    color: #2e7d32;
    border: 1px solid #a5d6a7;
}

.alert-warning {
    background: #fff3e0;
    color: #ef6c00;
    border: 1px solid #ffcc80;
}

/* ============================================
   MOBILE RESPONSIVE STYLES
   ============================================ */

/* Tablets and Small Desktops */
@media (max-width: 991px) {
    .content-wrapper {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        order: 2;
    }
    
    .header-main-content {
        flex-wrap: wrap;
        gap: 15px;
    }
    
    .main-nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
}

/* Mobile Devices */
@media (max-width: 768px) {
    html {
        font-size: 15px;
    }
    
    .header-top {
        display: none;
    }
    
    .header-main {
        padding: 10px 0;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .main-nav {
        position: fixed;
        top: 0;
        left: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background: var(--dark-color);
        padding: 80px 20px 20px;
        transition: var(--transition);
        overflow-y: auto;
        z-index: 999;
    }
    
    .main-nav.active {
        left: 0;
    }
    
    .main-nav ul {
        flex-direction: column;
        gap: 0;
    }
    
    .main-nav a {
        padding: 15px 20px;
        border-bottom: 1px solid rgba(255,255,255,0.1);
        border-radius: 0;
    }
    
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        background: rgba(255,255,255,0.05);
        box-shadow: none;
        padding-left: 20px;
        display: none;
    }
    
    .nav-item:hover .dropdown-menu,
    .nav-item.active .dropdown-menu {
        display: block;
    }
    
    .dropdown-menu a {
        color: rgba(255,255,255,0.8);
        border-bottom-color: rgba(255,255,255,0.1);
    }
    
    .menu-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0,0,0,0.5);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
        z-index: 998;
    }
    
    .menu-overlay.active {
        opacity: 1;
        visibility: visible;
    }
    
    .hero-section {
        padding: 40px 0;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
    
    .article-content {
        padding: 20px 15px;
    }
    
    .cards-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-social {
        justify-content: center;
    }
    
    .data-table {
        font-size: 0.875rem;
    }
    
    .data-table th,
    .data-table td {
        padding: 10px 8px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Small Mobile Devices */
@media (max-width: 480px) {
    .container {
        padding: 0 10px;
    }
    
    .logo-text {
        font-size: 1.2rem;
    }
    
    .logo-tagline {
        display: none;
    }
    
    .hero-title {
        font-size: 1.5rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .article-meta {
        flex-direction: column;
        gap: 10px;
    }
}

/* Print Styles */
@media print {
    .site-header,
    .site-footer,
    .sidebar,
    .ad-container,
    .mobile-menu-toggle {
        display: none !important;
    }
    
    .content-wrapper {
        grid-template-columns: 1fr;
    }
    
    .article-content {
        box-shadow: none;
        padding: 0;
    }
    
    a {
        color: inherit;
        text-decoration: underline;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #000080;
        --secondary-color: #006400;
        --text-color: #000000;
        --border-color: #000000;
    }
}

/* Dark Mode Support (Optional) */
@media (prefers-color-scheme: dark) {
    /* Uncomment to enable dark mode
    :root {
        --light-color: #1a1a1a;
        --white: #2d2d2d;
        --text-color: #e0e0e0;
        --text-light: #a0a0a0;
        --border-color: #404040;
    }
    */
}