:root {
    /* Light theme (default) */
    --bg-color: #f8f9fa;
    --text-color: #212529;
    --nav-bg: rgba(255, 255, 255, 0.9);
    --nav-text: #212529;
    --card-bg: #ffffff;
    --link-color: #64a19d;
    --border-color: #dee2e6;
}

/* Dark theme */
[data-theme="dark"] {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --nav-bg: rgba(33, 37, 41, 0.9);
    --nav-text: #e0e0e0;
    --card-bg: #1e1e1e;
    --link-color: #8eccc8;
    --border-color: #4d4d4d;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Lato', sans-serif;
}

#mainNav {
    background-color: var(--nav-bg);
}

#mainNav .navbar-brand,
#mainNav .nav-link {
    color: var(--nav-text);
    font-family: 'Lato', sans-serif;
}

#mainNav .nav-link.active {
    color: #64a19d;
}

.blog-card {
    background-color: var(--card-bg);
}

.read-more {
    color: var(--link-color);
}

.read-more:hover {
    color: var(--link-color);
    opacity: 0.8;
}

a {
    color: var(--link-color);
    text-decoration: none;
}

a:hover {
    color: var(--link-color);
    opacity: 0.8;
}

/* Navbar link hover effect */
.navbar-nav .nav-link {
    color: #212529;
    transition: color 0.3s ease;
    font-family: 'Lato', sans-serif;
}

.navbar-nav .nav-link:hover {
    color: #64a19d;
    text-decoration: underline;
}

/* Hero Section */
.masthead {
    height: 100vh;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.3), rgba(0, 0, 0, 0.7)), url('assets/images/hero-bg.jpg') no-repeat center center;
    background-size: cover;
    color: white;
}

/* Section Titles */
h2 {
    font-family: 'Lato', sans-serif;
    font-weight: 600;
}

/* Cards */
.card {
    border: none;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

.card-title {
    font-family: 'Lato', sans-serif;
    font-weight: 600;
}

.card-text {
    font-family: 'Lato', sans-serif;
    font-weight: 400;
}

/* Footer */
.footer {
    background: #181818 !important;
    color: #b0b0b0 !important;
}

.footer a {
    color: #b0b0b0 !important;
}

.footer a:hover {
    color: #64a19d !important;
}

/* Card Hover Styles */
.project-card-hover, .blog-card-hover {
    transition: box-shadow 0.3s cubic-bezier(0.4,0,0.2,1), border-color 0.3s cubic-bezier(0.4,0,0.2,1), transform 0.3s cubic-bezier(0.4,0,0.2,1);
}
.project-card-hover:hover, .blog-card-hover:hover {
    box-shadow: 0 0 0 2px #64a19d, 0 8px 24px rgba(100,161,157,0.15);
    border-color: #64a19d !important;
    transform: translateY(-4px) scale(1.03);
}
.project-card-hover:active, .blog-card-hover:active {
    box-shadow: 0 0 0 4px #64a19d, 0 8px 24px rgba(100,161,157,0.25);
    border-color: #64a19d !important;
    transform: scale(0.98);
}