/* Base Styles */
:root {
    --primary-color: #1a365d;
    --accent-color: #3182ce;
    --text-color: #ffffff;
    --bg-dark: #000000;
    --bg-gray: #1a202c;
}

body {
    font-family: 'Inter', sans-serif;
    scroll-behavior: smooth;
    overflow-x: hidden;
}

/* Navigation Styles */
.nav {
    transition: background-color 0.3s ease;
    backdrop-filter: blur(10px);
}

.nav-link {
    position: relative;
    transition: color 0.3s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 0;
    background-color: var(--accent-color);
    transition: width 0.3s ease;
}

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

/* Hero Section Styles */
.hero-title {
    background: linear-gradient(to right, #ffffff, #3182ce);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation: gradient 8s ease infinite;
}

@keyframes gradient {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* Service Cards */
.service-card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

/* Skill Bars */
.skill-bar {
    height: 4px;
    background: var(--accent-color);
    transform-origin: left;
    animation: skillFill 1.5s ease-out forwards;
}

@keyframes skillFill {
    from { transform: scaleX(0); }
    to { transform: scaleX(1); }
}

/* Brand Logos */
.brand-logo {
    filter: grayscale(100%);
    transition: filter 0.3s ease, transform 0.3s ease;
    opacity: 0.7;
}

.brand-logo:hover {
    filter: grayscale(0%);
    transform: scale(1.05);
    opacity: 1;
}

/* Testimonial Cards */
.testimonial-card {
    transition: transform 0.3s ease;
}

.testimonial-card:hover {
    transform: translateY(-5px);
}

/* CTA Button */
.cta-button {
    background: linear-gradient(45deg, var(--primary-color), var(--accent-color));
    padding: 1rem 2rem;
    border-radius: 8px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: none;
    cursor: pointer;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(49, 130, 206, 0.3);
}

/* Animation Classes */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.slide-in-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.slide-in-right {
    opacity: 0;
    transform: translateX(50px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Scroll Progress Bar */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(to right, var(--accent-color), #60a5fa);
    z-index: 1000;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .service-card:hover {
        transform: translateY(-5px);
    }
}

/* Loading Animation */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-dark);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}