/* ===== 2025 Modern Design - DD Transport ===== */

/* CSS Variables */
:root {
    /* Colors */
    --primary-blue: #3B82F6;
    --primary-purple: #8B5CF6;
    --accent-orange: #F59E0B;
    --accent-red: #EF4444;
    --accent-green: #10B981;
    --accent-cyan: #06B6D4;
    --accent-pink: #EC4899;
    
    /* Neutrals */
    --dark: #0F172A;
    --dark-secondary: #1E293B;
    --dark-tertiary: #334155;
    --light: #F8FAFC;
    --white: #FFFFFF;
    --text-primary: #0F172A;
    --text-secondary: #64748B;
    --text-light: #94A3B8;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #3B82F6 0%, #8B5CF6 100%);
    --gradient-warm: linear-gradient(135deg, #F59E0B 0%, #EF4444 100%);
    --gradient-cool: linear-gradient(135deg, #10B981 0%, #06B6D4 100%);
    --gradient-pink: linear-gradient(135deg, #EC4899 0%, #8B5CF6 100%);
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.16);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-xl: 2rem;
    --radius-full: 9999px;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--light);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Performance optimizations */
.hero,
.navbar,
.service-card,
.scroll-top,
.hero-slide {
    will-change: transform;
    transform: translate3d(0, 0, 0);
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

/* Glassmorphism Effect */
.glass {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px); /* Reduced from 20px */
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.8);
    box-shadow: var(--shadow-lg);
}

/* Gradient Text */
.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Particles Background */
.particles-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: linear-gradient(180deg, #F8FAFC 0%, #E0E7FF 100%);
    contain: layout style paint;
}

/* =========================
   NAVIGATION
   ========================= */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--spacing-md) 0;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px); /* Reduced from 20px */
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-sm) 0;
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
}

.logo img {
    height: 50px;
    width: auto;
    transition: transform 0.3s ease;
}

.logo:hover img {
    transform: scale(1.05);
}

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

.nav-link {
    font-weight: 500;
    font-size: 15px;
    color: var(--text-primary);
    position: relative;
    padding: var(--spacing-xs) 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width 0.3s ease;
}

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

.nav-cta {
    display: flex;
    gap: var(--spacing-sm);
}

.btn-outline {
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--primary-blue);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 14px;
    color: var(--primary-blue);
    transition: all 0.3s ease;
}

.btn-outline:hover {
    background: var(--gradient-primary);
    color: var(--white);
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.mobile-toggle span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* =========================
   HERO SECTION
   ========================= */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding-top: 80px;
}

.hero-slider {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 1.5s ease-in-out;
    animation: kenburns 20s ease-in-out infinite;
}

.hero-slide.active {
    opacity: 1;
    z-index: 1;
}

@keyframes kenburns {
    0%, 100% {
        transform: scale3d(1, 1, 1);
    }
    50% {
        transform: scale3d(1.08, 1.08, 1);
    }
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.85) 0%, rgba(59, 130, 246, 0.7) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--white);
    max-width: 900px;
    padding: 0 var(--spacing-lg);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.5rem 1.25rem;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: var(--spacing-lg);
}

.badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-green);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale3d(1, 1, 1);
    }
    50% {
        opacity: 0.5;
        transform: scale3d(1.15, 1.15, 1);
    }
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.4rem);
    margin-bottom: var(--spacing-xl);
    opacity: 0.95;
    font-weight: 400;
}

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

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 1rem 2rem;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 16px;
    box-shadow: var(--shadow-lg);
    transition: all 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.btn-primary svg {
    transition: transform 0.3s ease;
}

.btn-primary:hover svg {
    transform: translateX(5px);
}

.btn-glass {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 1rem 2rem;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: var(--white);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s ease;
}

.btn-glass:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--white);
    font-size: 14px;
    opacity: 0.8;
}

.scroll-arrow {
    width: 24px;
    height: 36px;
    border: 2px solid var(--white);
    border-radius: 12px;
    position: relative;
}

.scroll-arrow::after {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--white);
    border-radius: 2px;
    animation: scrollDown 1.5s infinite;
}

@keyframes scrollDown {
    0% {
        opacity: 0;
        top: 8px;
    }
    50% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        top: 18px;
    }
}

/* =========================
   STATS SECTION
   ========================= */
.stats {
    padding: var(--spacing-3xl) 0;
    background: var(--white);
    margin-top: -80px;
    position: relative;
    z-index: 10;
}

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

.stat-card {
    text-align: center;
    padding: var(--spacing-lg);
}

.stat-number {
    font-size: 3.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* =========================
   SECTION HEADER
   ========================= */
.section-header {
    text-align: left;
    margin-bottom: var(--spacing-3xl);
    max-width: 800px;
}

.section-header.centered {
    text-align: center;
    margin-left: auto;
    margin-right: auto;
}

.section-badge {
    display: inline-block;
    padding: 0.5rem 1.25rem;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: var(--radius-full);
    font-size: 14px;
    font-weight: 600;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-md);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* =========================
   SERVICES SECTION
   ========================= */
.services {
    padding: var(--spacing-3xl) 0;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.service-card {
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s ease;
    transform: translate3d(0, 0, 0);
}

.service-card:hover {
    transform: translate3d(0, -8px, 0);
    box-shadow: var(--shadow-xl);
}

.service-icon-wrapper {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(59, 130, 246, 0.05);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
}

.service-icon {
    width: 48px;
    height: 48px;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.service-card p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 600;
    color: var(--primary-blue);
    font-size: 15px;
}

.service-link:hover {
    gap: var(--spacing-sm);
}

/* =========================
   ABOUT SECTION
   ========================= */
.about {
    padding: var(--spacing-3xl) 0;
    background: var(--white);
}

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

.image-wrapper {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.image-wrapper img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.5s ease;
    transform: translate3d(0, 0, 0);
}

.image-wrapper:hover img {
    transform: scale3d(1.05, 1.05, 1);
}

.image-badge {
    position: absolute;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    text-align: center;
}

.badge-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-blue);
}

.badge-text {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
}

.about-text {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.about-features {
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.feature-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--light);
    border-radius: var(--radius-md);
    transition: background 0.3s ease, transform 0.3s ease;
    transform: translate3d(0, 0, 0);
}

.feature-item:hover {
    background: rgba(59, 130, 246, 0.05);
    transform: translate3d(8px, 0, 0);
}

.feature-icon {
    width: 48px;
    height: 48px;
    min-width: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    color: var(--white);
}

.feature-item h4 {
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

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

.about-actions {
    margin-top: var(--spacing-xl);
}

/* =========================
   CONTACT SECTION
   ========================= */
.contact {
    padding: var(--spacing-3xl) 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    margin-top: var(--spacing-3xl);
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-lg);
}

.info-card {
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    transform: translate3d(0, 0, 0);
}

.info-card:hover {
    transform: translate3d(0, -5px, 0);
    box-shadow: var(--shadow-xl);
}

.info-icon {
    margin: 0 auto var(--spacing-md);
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.info-card h3 {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.info-card p {
    color: var(--text-secondary);
    font-size: 15px;
}

.info-card a {
    color: var(--primary-blue);
    font-weight: 500;
}

.info-card a:hover {
    text-decoration: underline;
}

.cta-card {
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    text-align: center;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.cta-icon {
    margin-bottom: var(--spacing-lg);
}

.cta-card h3 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.cta-card p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

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

.social-link {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--light);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.social-link:hover {
    background: var(--gradient-primary);
    color: var(--white);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

/* =========================
   FOOTER
   ========================= */
.footer {
    background: var(--dark);
    color: var(--white);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

.footer-logo {
    height: 50px;
    width: auto;
    margin-bottom: var(--spacing-md);
    filter: brightness(0) invert(1);
}

.footer-brand p {
    color: var(--text-light);
    line-height: 1.7;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.footer-col h4 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
    font-weight: 600;
}

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

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

.footer-col a {
    color: var(--text-light);
    font-size: 15px;
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-xl);
}

.footer-bottom p {
    color: var(--text-light);
    font-size: 14px;
    margin: 0.25rem 0;
}

/* =========================
   SCROLL TO TOP
   ========================= */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: var(--white);
    border: none;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
    box-shadow: var(--shadow-lg);
    z-index: 999;
    transform: translate3d(0, 0, 0);
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    transform: translate3d(0, -5px, 0);
    box-shadow: var(--shadow-xl);
}

/* =========================
   ANIMATIONS (Optimized)
   ========================= */
[data-aos] {
    opacity: 0;
    transition: opacity 0.5s ease, transform 0.5s ease;
}

[data-aos].aos-animate {
    opacity: 1;
}

[data-aos="fade-up"] {
    transform: translate3d(0, 30px, 0);
}

[data-aos="fade-up"].aos-animate {
    transform: translate3d(0, 0, 0);
}

[data-aos="fade-down"] {
    transform: translate3d(0, -30px, 0);
}

[data-aos="fade-down"].aos-animate {
    transform: translate3d(0, 0, 0);
}

[data-aos="fade-left"] {
    transform: translate3d(-30px, 0, 0);
}

[data-aos="fade-left"].aos-animate {
    transform: translate3d(0, 0, 0);
}

[data-aos="fade-right"] {
    transform: translate3d(30px, 0, 0);
}

[data-aos="fade-right"].aos-animate {
    transform: translate3d(0, 0, 0);
}

/* =========================
   RESPONSIVE DESIGN
   ========================= */
@media (max-width: 1024px) {
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu,
    .nav-cta {
        display: none;
    }
    
    .mobile-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-info {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-xl: 2rem;
        --spacing-2xl: 3rem;
        --spacing-3xl: 4rem;
    }
    
    .hero {
        min-height: 80vh;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
}

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

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }