:root {
    /* Colors - Light Mode (Default) */
    --primary-blue: #5B9BD5;
    --secondary-blue: #2E75B6;
    --dark-blue: #1F4E79;
    --black: #000000;
    --dark-gray: #1a1a1a;
    --light-gray: #f4f6f8;
    --white: #ffffff;
    --text-color: #333333;
    --text-light: #666666;
    --bg-color: #ffffff;
    --card-bg: #ffffff;
    --section-bg: #f4f6f8;
    --nav-bg: rgba(255, 255, 255, 0.95);
    --border-color: rgba(0, 0, 0, 0.05);

    /* Spacing */
    --section-padding: 100px 0;

    /* Transitions */
    --transition: all 0.3s ease;
}

/* Dark Mode Variables */
body.dark-mode {
    --primary-blue: #5B9BD5;
    --secondary-blue: #4A90E2;
    --dark-blue: #8ab4f8;
    /* Lighter for dark mode */
    --black: #ffffff;
    /* Invert for headings */
    --dark-gray: #e0e0e0;
    --light-gray: #1e1e1e;
    --white: #121212;
    /* Dark bg */
    --text-color: #e0e0e0;
    --text-light: #a0a0a0;
    --bg-color: #121212;
    --card-bg: #1e1e1e;
    --section-bg: #0a0a0a;
    --nav-bg: rgba(18, 18, 18, 0.95);
    --border-color: rgba(255, 255, 255, 0.1);
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
    width: 100%;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    overflow-x: hidden;
    width: 100%;
    transition: background-color 0.3s ease, color 0.3s ease;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

/* Utilities */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    color: var(--white);
    border: none;
    box-shadow: 0 4px 15px rgba(46, 117, 182, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(46, 117, 182, 0.4);
}

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

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

.btn-block {
    display: block;
    width: 100%;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--black);
    margin-bottom: 15px;
}

.section-header .line {
    width: 60px;
    height: 4px;
    background: var(--primary-blue);
    margin: 0 auto 20px;
    border-radius: 2px;
}

.section-header p {
    color: var(--text-light);
    font-size: 1.1rem;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: var(--nav-bg);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 20px var(--border-color);
    padding: 15px 0;
    transition: var(--transition);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo img {
    height: 30px;
    width: auto;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-link {
    font-weight: 500;
    color: var(--text-color);
    /* Updated for dark mode */
    position: relative;
    font-size: 0.95rem;
}

.nav-link:not(.btn-primary)::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background-color: var(--primary-blue);
    transition: var(--transition);
}

.nav-link:not(.btn-primary):hover::after,
.nav-link.active:not(.btn-primary)::after {
    width: 100%;
}

/* Dark Mode Toggle Button */
.theme-toggle {
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 5px;
    transition: var(--transition);
}

.theme-toggle:hover {
    color: var(--primary-blue);
}

.hamburger {
    display: none;
    cursor: pointer;
}

.bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    transition: var(--transition);
    background-color: var(--text-color);
    /* Updated for dark mode */
}

/* Hero Section */
.hero {
    padding: 160px 0 100px;
    background: radial-gradient(circle at top right, rgba(91, 155, 213, 0.1), transparent 40%),
        radial-gradient(circle at bottom left, rgba(46, 117, 182, 0.05), transparent 40%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.hero-content h1 {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--black);
    font-weight: 800;
}

.hero-content .highlight {
    color: var(--primary-blue);
    position: relative;
    display: inline-block;
}

.hero-content p {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 30px;
    max-width: 500px;
}

.hero-btns {
    display: flex;
    gap: 15px;
}

/* Hero Visual Animation */
.hero-visual {
    position: relative;
    height: 400px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.tech-circle {
    width: 350px;
    height: 350px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(91, 155, 213, 0.1), rgba(46, 117, 182, 0.2));
    position: absolute;
    animation: pulse 4s infinite ease-in-out;
}

.tech-circle-2 {
    width: 250px;
    height: 250px;
    border-radius: 50%;
    border: 2px solid rgba(91, 155, 213, 0.3);
    position: absolute;
    animation: spin 20s linear infinite;
}

.floating-icon {
    position: absolute;
    background: var(--card-bg);
    /* Updated for dark mode */
    border-radius: 15px;
    padding: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    font-size: 2rem;
    color: var(--primary-blue);
    animation: float 6s ease-in-out infinite;
}

.icon-1 {
    top: 20%;
    left: 20%;
    animation-delay: 0s;
}

.icon-2 {
    bottom: 20%;
    right: 20%;
    animation-delay: 2s;
}

.icon-3 {
    top: 50%;
    right: 10%;
    animation-delay: 4s;
    font-size: 1.5rem;
}

/* Services Section */
.services {
    padding: var(--section-padding);
    background-color: var(--bg-color);
    /* Updated for dark mode */
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--card-bg);
    /* Updated for dark mode */
    padding: 40px 30px;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    /* Updated for dark mode */
    text-align: center;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(46, 117, 182, 0.15);
    border-color: var(--primary-blue);
}

.icon-box {
    width: 70px;
    height: 70px;
    background: rgba(91, 155, 213, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    font-size: 1.8rem;
    color: var(--primary-blue);
    transition: var(--transition);
}

.service-card:hover .icon-box {
    background: var(--primary-blue);
    color: var(--white);
}

.service-card h3 {
    margin-bottom: 15px;
    font-size: 1.4rem;
    color: var(--black);
}

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

/* About Section */
.about {
    padding: var(--section-padding);
    background-color: var(--section-bg);
    /* Updated for dark mode */
}

.about-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.image-wrapper {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.1);
}

.image-wrapper img {
    width: 100%;
    height: auto;
    transition: var(--transition);
}

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

.experience-badge {
    position: absolute;
    bottom: 30px;
    right: 30px;
    background: var(--card-bg);
    /* Updated for dark mode */
    padding: 20px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    gap: 15px;
}

.experience-badge .years {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-blue);
    line-height: 1;
}

.experience-badge .text {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-color);
    /* Updated for dark mode */
    line-height: 1.2;
}

.about-content h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--black);
}

.line-left {
    width: 60px;
    height: 4px;
    background: var(--primary-blue);
    margin-bottom: 30px;
    border-radius: 2px;
}

.about-content .lead {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--dark-blue);
    margin-bottom: 20px;
}

.features-list {
    margin-top: 30px;
}

.features-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
    font-weight: 500;
    color: var(--text-color);
}

.features-list li i {
    color: var(--primary-blue);
}

/* Contact Section */
.contact {
    padding: var(--section-padding);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 50px;
    background: var(--card-bg);
    /* Updated for dark mode */
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.05);
}

.contact-info {
    background: linear-gradient(135deg, var(--dark-blue), var(--secondary-blue));
    padding: 50px;
    color: var(--white);
}

/* Dark Mode Overrides for Contact Info */
body.dark-mode .contact-info {
    color: #ffffff;
    /* Force white text in dark mode */
}

body.dark-mode .contact-info h4,
body.dark-mode .contact-info p {
    color: #ffffff;
    opacity: 0.9;
}

.info-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 40px;
}

.info-item i {
    font-size: 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    padding: 12px;
    border-radius: 10px;
}

.info-item h4 {
    font-size: 1.1rem;
    margin-bottom: 5px;
    opacity: 0.9;
}

.info-item p {
    opacity: 0.8;
    font-size: 0.95rem;
}

.contact-form {
    padding: 50px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px;
    border: 1px solid var(--border-color);
    /* Updated for dark mode */
    border-radius: 10px;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
    background: var(--section-bg);
    /* Updated for dark mode */
    color: var(--text-color);
    /* Updated for dark mode */
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    background: var(--card-bg);
    /* Updated for dark mode */
    box-shadow: 0 0 0 4px rgba(91, 155, 213, 0.1);
}

/* Footer */
footer {
    background: var(--black);
    color: var(--white);
    padding: 60px 0 30px;
}

/* Dark Mode Override for Footer */
body.dark-mode footer {
    background: #050505;
    /* Very dark background */
    color: #ffffff;
}

.footer-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.footer-logo h2 {
    font-size: 2rem;
    margin-bottom: 10px;
}

.footer-logo p {
    opacity: 0.6;
    margin-bottom: 30px;
}

.social-links {
    display: flex;
    gap: 20px;
    margin-bottom: 40px;
}

.social-links a {
    width: 45px;
    height: 45px;
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition);
}

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

.copyright {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    width: 100%;
    padding-top: 30px;
    font-size: 0.9rem;
    opacity: 0.5;
}

/* Animations */
@keyframes pulse {
    0% {
        transform: scale(1);
        opacity: 0.5;
    }

    50% {
        transform: scale(1.05);
        opacity: 0.8;
    }

    100% {
        transform: scale(1);
        opacity: 0.5;
    }
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

@keyframes float {
    0% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-20px);
    }

    100% {
        transform: translateY(0);
    }
}

/* Scroll Animations Classes */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-in-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.fade-in-right {
    opacity: 0;
    transform: translateX(50px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

.delay-100 {
    transition-delay: 0.1s;
}

.delay-200 {
    transition-delay: 0.2s;
}

.delay-300 {
    transition-delay: 0.3s;
}

/* Responsive */
@media (max-width: 992px) {

    .hero-container,
    .about-container,
    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero {
        padding-top: 120px;
        text-align: center;
    }

    .hero-content p {
        margin: 0 auto 30px;
    }

    .hero-btns {
        justify-content: center;
    }

    .hero-visual {
        height: 300px;
    }

    .about-image {
        order: -1;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 70px;
        right: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--nav-bg);
        /* Updated for dark mode */
        flex-direction: column;
        justify-content: center;
        transition: var(--transition);
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
    }

    .nav-links.active {
        right: 0;
    }

    .hamburger {
        display: block;
    }

    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .section-header h2 {
        font-size: 2rem;
    }

    .hero-content h1 {
        font-size: 2.5rem;
    }
}

/* Ensure button text is white in dark mode */
body.dark-mode .btn-primary {
    color: #ffffff;
}