/* Variables */
:root {
    --primary: #0056b3;
    --primary-light: #e7f1ff;
    --dark: #212529;
    --light: #f8f9fa;
    --secondary: #6c757d;
    --transition: all 0.3s ease;
}

/* Global Styles */
body {
    font-family: 'Inter', sans-serif;
    color: var(--dark);
    line-height: 1.6;
}

.text-primary { color: var(--primary) !important; }
.bg-primary { background-color: var(--primary) !important; }
.bg-primary-light { background-color: var(--primary-light) !important; }

.section-padding {
    padding: 100px 0;
}

/* Navbar Customization */
.navbar {
    transition: var(--transition);
}

.nav-link {
    font-size: 0.95rem;
    color: var(--dark) !important;
}

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

/* Hero Section */
.hero-section {
    min-height: 80vh;
    padding: 80px 0;
}

.profile-img {
    border: 10px solid white;
    box-shadow: 0 1rem 3rem rgba(0,0,0,0.1) !important;
}

/* Timeline Customization */
.border-end-custom {
    border-right: 2px solid var(--primary-light);
}

.timeline-item {
    position: relative;
}

/* Skill Boxes */
.skill-box {
    transition: var(--transition);
    background: white;
}

.skill-box:hover {
    transform: translateY(-5px);
    box-shadow: 0 0.5rem 1.5rem rgba(0,0,0,0.08);
    border-color: var(--primary) !important;
}

/* Contact Section Icons */
.icon-circle {
    width: 45px;
    height: 45px;
    background: var(--primary-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Forms */
.form-control {
    border: 1px solid #eee;
    padding: 0.75rem 1rem;
}

.form-control:focus {
    box-shadow: 0 0 0 0.25rem rgba(0, 86, 179, 0.1);
    border-color: var(--primary);
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.8s ease forwards;
}

.fade-in {
    animation: fadeIn 1s ease forwards;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Responsive Fixes */
@media (max-width: 768px) {
    .border-end-custom {
        border-right: none;
        text-align: left !important;
        margin-bottom: 1rem;
    }
    .display-3 {
        font-size: 2.5rem;
    }
}