:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --accent-color: #ffc107;
    --dark-color: #212529;
    --light-color: #f8f9fa;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    position: relative;
}

section {
    padding: 5rem 0;
}

.hero-section {
    height: 100vh;
    display: flex;
    align-items: center;
    background-color: var(--dark-color);
    color: var(--light-color);
}

.tech-icon {
    font-size: 3rem;
    margin: 1rem;
    color: var(--primary-color);
    transition: all 0.3s ease;
}

.tech-icon:hover {
    color: var(--accent-color);
    transform: scale(1.2);
}

.project-card {
    transition: transform 0.3s ease;
    height: 100%;
}

.project-card:hover {
    transform: translateY(-10px);
}

.navbar.scrolled {
    background-color: rgba(33, 37, 41, 0.98) !important;
    transition: background-color 0.5s ease;
}

.social-icon {
    font-size: 2.5rem;
    margin: 0 1.5rem;
    color: var(--primary-color);
    transition: all 0.3s ease;
}

.social-icon:hover {
    color: var(--accent-color);
    transform: scale(1.2);
}

.section-title {
    position: relative;
    margin-bottom: 3rem;
}

.section-title::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: -10px;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background-color: var(--primary-color);
}

#back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    display: none;
    z-index: 99;
}