:root {
    --primary-color: #0077b6; /* A clean blue */
    --secondary-color: #48cae4; /* Lighter blue/cyan */
    --text-color: #333;
    --bg-color: #f8f9fa;
    --card-bg: #ffffff;
}

body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
}

.container {
    max-width: 1000px;
    margin: auto;
    padding: 0 20px;
}

header {
    background: var(--primary-color);
    color: white;
    padding: 30px 0;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

header h1 {
    margin-bottom: 5px;
    font-size: 2.5em;
}

.tagline {
    font-style: italic;
    font-weight: 400;
    opacity: 0.9;
    margin-top: 0;
}

nav {
    margin-top: 20px;
}

nav a {
    color: white;
    text-decoration: none;
    margin: 0 15px;
    font-weight: 700;
    padding-bottom: 3px;
    transition: border-bottom 0.3s;
}

nav a:hover {
    border-bottom: 2px solid var(--secondary-color);
}

main {
    padding: 30px 0;
}

.card {
    background: var(--card-bg);
    padding: 30px;
    margin-bottom: 30px;
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.05);
}

h2 {
    color: var(--primary-color);
    border-bottom: 3px solid var(--secondary-color);
    padding-bottom: 10px;
    margin-top: 0;
    display: flex;
    align-items: center;
}

.icon {
    margin-right: 10px;
    font-size: 1.2em;
}

.meta-data ul {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 10px;
    margin-top: 15px;
}

.meta-data li {
    background: var(--bg-color);
    padding: 8px 15px;
    border-radius: 5px;
}

.meta-data h3 {
    color: var(--text-color);
    margin-bottom: 5px;
    border-bottom: 1px dashed #ccc;
    padding-bottom: 5px;
    font-size: 1.1em;
}

.project-item {
    border-left: 4px solid var(--secondary-color);
    padding-left: 15px;
    margin-bottom: 25px;
}

.project-item h3 {
    margin-top: 0;
    color: var(--text-color);
}

.source-link {
    font-size: 0.9em;
    color: #666;
    font-style: italic;
}

.button {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 10px 20px;
    text-decoration: none;
    border-radius: 5px;
    margin-right: 10px;
    margin-top: 10px;
    transition: background-color 0.3s;
}

.button:hover {
    background-color: #005f99;
}

footer {
    background: #222;
    color: #ccc;
    text-align: center;
    padding: 20px 0;
    font-size: 0.9em;
}