/* ===============================================
   MANN TRANS INC - MODERN CSS FRAMEWORK
   Enterprise Logistics Website
   Optimized for Performance & SEO
   =============================================== */

/* ===============================================
   1. CSS CUSTOM PROPERTIES
   =============================================== */
:root {
    /* Primary Brand Colors - Mann Trans Logo Blue */
    --primary-blue: #2255D0;
    --primary-dark: #1a4bb8;
    --primary-light: #4a6cf7;
    --accent-blue: #60a5fa;
    
    /* 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;
    --danger: #ef4444;
    --info: #3b82f6;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
    --gradient-overlay: linear-gradient(135deg, rgba(30, 58, 138, 0.95) 0%, rgba(59, 130, 246, 0.85) 100%);
    
    /* Shadows */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    --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);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Typography */
    --font-sans: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    --spacing-20: 5rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===============================================
   2. GLOBAL RESET & BASE STYLES
   =============================================== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    font-weight: var(--font-weight-normal);
    line-height: 1.6;
    color: var(--gray-700);
    background-color: var(--white);
    overflow-x: hidden;
}

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

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

ul, ol {
    list-style: none;
}

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

input,
textarea,
select {
    font-family: inherit;
    font-size: inherit;
}

/* ===============================================
   3. TYPOGRAPHY
   =============================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
    color: var(--gray-900);
    margin-bottom: var(--spacing-4);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-4);
    color: var(--gray-600);
}

.text-lead {
    font-size: 1.25rem;
    line-height: 1.7;
    color: var(--gray-600);
}

.text-small {
    font-size: 0.875rem;
}

.text-xs {
    font-size: 0.75rem;
}

/* ===============================================
   4. CONTAINER & LAYOUT
   =============================================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

.container-fluid {
    width: 100%;
    padding: 0 var(--spacing-4);
}

.container-wide {
    max-width: 1400px;
}

.container-narrow {
    max-width: 960px;
}

/* ===============================================
   5. HEADER & NAVIGATION
   =============================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--white);
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.3s ease;
    will-change: box-shadow;
}

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

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-4) 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--primary-blue);
}

.logo img {
    height: 50px;
    width: auto;
}

.nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-6);
}

.nav-link {
    font-weight: var(--font-weight-medium);
    color: var(--gray-700);
    padding: var(--spacing-2) 0;
    position: relative;
}

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

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

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-2);
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--gray-700);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

/* ===============================================
   6. BUTTONS
   =============================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-6);
    font-weight: var(--font-weight-semibold);
    font-size: 1rem;
    line-height: 1.5;
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    text-align: center;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

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

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

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

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

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

.btn-lg {
    padding: var(--spacing-4) var(--spacing-8);
    font-size: 1.125rem;
}

.btn-sm {
    padding: var(--spacing-2) var(--spacing-4);
    font-size: 0.875rem;
}

/* ===============================================
   7. HERO SECTION
   =============================================== */
.hero {
    position: relative;
    min-height: 600px;
    display: flex;
    align-items: center;
    padding: var(--spacing-20) 0;
    margin-top: 80px;
    background: var(--gradient-primary);
    color: var(--white);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><circle cx="30" cy="30" r="1.5" fill="rgba(255,255,255,0.1)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-block;
    padding: var(--spacing-2) var(--spacing-4);
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0.5px;
    text-transform: uppercase;
    margin-bottom: var(--spacing-4);
    backdrop-filter: blur(10px);
}

.hero h1 {
    color: var(--white);
    margin-bottom: var(--spacing-6);
}

.hero p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-8);
}

.hero-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-8);
}

.hero-feature {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.hero-feature i {
    font-size: 1.25rem;
    color: var(--white);
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-4);
}

/* ===============================================
   8. SECTIONS
   =============================================== */
.section {
    padding: var(--spacing-20) 0;
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-12);
}

.section-badge {
    display: inline-block;
    padding: var(--spacing-2) var(--spacing-4);
    background: var(--gray-100);
    color: var(--primary-blue);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0.5px;
    text-transform: uppercase;
    margin-bottom: var(--spacing-3);
}

.section-title {
    margin-bottom: var(--spacing-4);
}

.section-description {
    font-size: 1.125rem;
    color: var(--gray-600);
}

/* Background Utilities */
.bg-light {
    background: var(--gray-50);
}

.bg-white {
    background: var(--white);
}

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

/* ===============================================
   9. CARDS
   =============================================== */
.card {
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: all var(--transition-base);
}

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

.card-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.card-body {
    padding: var(--spacing-6);
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-3);
    color: var(--gray-900);
}

.card-text {
    color: var(--gray-600);
    margin-bottom: var(--spacing-4);
}

/* ===============================================
   10. FORMS
   =============================================== */
.form-group {
    margin-bottom: var(--spacing-5);
}

.form-label {
    display: block;
    font-weight: var(--font-weight-medium);
    color: var(--gray-700);
    margin-bottom: var(--spacing-2);
}

.form-control {
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    font-size: 1rem;
    line-height: 1.5;
    color: var(--gray-700);
    background: var(--white);
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
}

.form-control::placeholder {
    color: var(--gray-400);
}

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

select.form-control {
    appearance: none;
    background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M19 9l-7 7-7-7"/></svg>');
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 1.25rem;
    padding-right: var(--spacing-10);
}

.form-error {
    color: var(--danger);
    font-size: 0.875rem;
    margin-top: var(--spacing-2);
}

.form-success {
    color: var(--success);
    font-size: 0.875rem;
    margin-top: var(--spacing-2);
}

/* ===============================================
   11. GRID SYSTEM
   =============================================== */
.grid {
    display: grid;
    gap: var(--spacing-6);
}

.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

/* ===============================================
   12. UTILITIES
   =============================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--primary-blue); }
.text-white { color: var(--white); }
.text-gray { color: var(--gray-600); }

.font-bold { font-weight: var(--font-weight-bold); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-medium { font-weight: var(--font-weight-medium); }

.mb-2 { margin-bottom: var(--spacing-2); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-6 { margin-bottom: var(--spacing-6); }
.mb-8 { margin-bottom: var(--spacing-8); }

.mt-2 { margin-top: var(--spacing-2); }
.mt-4 { margin-top: var(--spacing-4); }
.mt-6 { margin-top: var(--spacing-6); }
.mt-8 { margin-top: var(--spacing-8); }

/* ===============================================
   13. FOOTER
   =============================================== */
.footer {
    background: var(--gray-900);
    color: var(--gray-300);
    padding: var(--spacing-8) 0 var(--spacing-4);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-6);
    margin-bottom: var(--spacing-6);
}

.footer-section h5 {
    color: var(--white);
    margin-bottom: var(--spacing-3);
    font-size: 1rem;
}

.footer-link {
    display: block;
    color: var(--gray-400);
    padding: var(--spacing-1) 0;
    transition: color var(--transition-base);
    font-size: 0.9rem;
}

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

.footer-bottom {
    border-top: 1px solid var(--gray-800);
    padding-top: var(--spacing-4);
    text-align: center;
    color: var(--gray-500);
    font-size: 0.875rem;
}

.social-links {
    display: flex;
    gap: var(--spacing-3);
    margin-top: var(--spacing-3);
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--gray-800);
    border-radius: var(--radius-full);
    color: var(--gray-400);
    transition: all var(--transition-base);
}

.social-link:hover {
    background: var(--primary-blue);
    color: var(--white);
}

/* ===============================================
   14. RESPONSIVE DESIGN
   =============================================== */
@media (max-width: 1024px) {
    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 300px;
        height: 100vh;
        background: var(--white);
        flex-direction: column;
        align-items: flex-start;
        padding: var(--spacing-8);
        box-shadow: var(--shadow-2xl);
        transition: right var(--transition-slow);
    }
    
    .nav.active {
        right: 0;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .grid-cols-3,
    .grid-cols-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hero {
        min-height: 500px;
        padding: var(--spacing-12) 0;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .section {
        padding: var(--spacing-12) 0;
    }
    
    .grid-cols-2,
    .grid-cols-3,
    .grid-cols-4 {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

/* ===============================================
   15. ANIMATIONS
   =============================================== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(50px); }
    to { opacity: 1; transform: translateX(0); }
}

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

.slide-in-right {
    animation: slideInRight 0.6s ease-out;
}

/* ===============================================
   16. 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-width: 0;
}

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

/* ===============================================
   17. PRINT STYLES
   =============================================== */
@media print {
    .header,
    .footer,
    .btn,
    .mobile-menu-toggle {
        display: none;
    }
}

/* ===============================================
   BLOG STYLES
   =============================================== */

/* Blog Section */
.blog-section {
    padding: 4rem 0;
    background: var(--gray-50);
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
    align-items: start;
}

/* Blog Post */
.blog-post {
    background: var(--white);
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    border: 1px solid var(--gray-200);
}

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

.blog-post.featured {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    min-height: 400px;
}

.blog-image {
    position: relative;
    overflow: hidden;
    height: 250px;
}

.blog-post.featured .blog-image {
    height: 100%;
}

.blog-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

.blog-content {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 200px;
}

.blog-post.featured .blog-content {
    padding: 3rem;
    justify-content: center;
}

.blog-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    font-size: 0.875rem;
    color: var(--gray-600);
}

.blog-date {
    color: var(--gray-500);
}

.blog-category {
    background: var(--primary-blue);
    color: var(--white);
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.blog-post h2,
.blog-post h3 {
    margin-bottom: 1rem;
    line-height: 1.3;
    margin-top: 0;
    padding-top: 0;
}

.blog-post h2 a,
.blog-post h3 a {
    color: var(--gray-900);
    text-decoration: none;
    transition: color 0.3s ease;
}

.blog-post h2 a:hover,
.blog-post h3 a:hover {
    color: var(--primary-blue);
}

.blog-post p {
    color: var(--gray-600);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.read-more {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.read-more:hover {
    color: var(--primary-dark);
    transform: translateX(4px);
}

.read-more::after {
    content: '→';
    transition: transform 0.3s ease;
}

.read-more:hover::after {
    transform: translateX(4px);
}

/* Newsletter Signup */
.newsletter-signup {
    background: var(--white);
    border-radius: 1rem;
    padding: 3rem 2rem;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
}

.newsletter-content h3 {
    margin-bottom: 1rem;
    color: var(--gray-900);
}

.newsletter-content p {
    color: var(--gray-600);
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.newsletter-form {
    max-width: 500px;
    margin: 0 auto;
}

.newsletter-form .form-group {
    display: flex;
    gap: 1rem;
    align-items: stretch;
}

.newsletter-form input {
    flex: 1;
    padding: 0.875rem 1rem;
    border: 2px solid var(--gray-200);
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

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

.newsletter-form .btn {
    padding: 0.875rem 2rem;
    white-space: nowrap;
}

/* Responsive Blog Styles */
@media (max-width: 1024px) {
    .blog-post.featured {
        grid-column: 1 / -1;
        grid-template-columns: 1fr;
    }
    
    .blog-post.featured .blog-image {
        height: 300px;
    }
}

@media (max-width: 768px) {
    .blog-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .blog-post.featured {
        grid-column: 1 / -1;
        grid-template-columns: 1fr;
        min-height: auto;
    }
    
    .blog-post.featured .blog-image {
        height: 250px;
    }
    
    .blog-content {
        padding: 1.5rem;
        min-height: auto;
    }
    
    .blog-post.featured .blog-content {
        padding: 2rem;
    }
    
    .newsletter-signup {
        padding: 2rem 1.5rem;
    }
    
    .newsletter-form .form-group {
        flex-direction: column;
        gap: 1rem;
    }
    
    .newsletter-form .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .blog-section {
        padding: 2rem 0;
    }
    
    .blog-content {
        padding: 1rem;
    }
    
    .blog-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
}