body {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --card-bg-color: #1e1e1e;
    --border-color-soft: #333;
    --border-color-hard: #444;
    --shadow-color: rgba(0, 0, 0, 0.2);
    --heading-text-color: #ffffff;
    --accent-color: #00bcd4;
    --table-header-bg: #333;
    --footer-text-color: #aaa;
    --project-item-bg: #2a2a2a;

    transition: background-color 0.3s ease, color 0.3s ease;

    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
    
    background-color: var(--bg-color);
    color: var(--text-color);
}

body.light-mode {
    --bg-color: #f4f4f4;
    --text-color: #333333;
    --card-bg-color: #ffffff;
    --border-color-soft: #dddddd;
    --border-color-hard: #cccccc;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --heading-text-color: #000000;
    --accent-color: #007bff;
    --table-header-bg: #f2f2f2;
    --footer-text-color: #555555;
    --project-item-bg: #f9f9f9;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.navbar {
    background-color: var(--card-bg-color);
    border-bottom: 1px solid var(--border-color-soft);
    padding: 1rem 0;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar .logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent-color);
    transition: color 0.3s ease;
}

.nav-links {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
}

.nav-links li {
    margin-left: 1.5rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--accent-color);
}

main {
    padding-top: 2rem;
    padding-bottom: 2rem;
}

.card {
    background-color: var(--card-bg-color);
    border: 1px solid var(--border-color-soft);
    border-radius: 8px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 12px var(--shadow-color);
    transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

h1, h2 {
    color: var(--heading-text-color);
    border-bottom: 2px solid var(--accent-color);
    padding-bottom: 0.5rem;
    transition: color 0.3s ease, border-color 0.3s ease;
}

.tech-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1.5rem;
}

.tech-table th, .tech-table td {
    border: 1px solid var(--border-color-hard);
    padding: 0.75rem 1rem;
    text-align: left;
    vertical-align: middle;
    transition: border-color 0.3s ease;
}

.tech-table th {
    background-color: var(--table-header-bg);
    color: var(--accent-color);
    transition: background-color 0.3s ease, color 0.3s ease;
}

.tech-table td img {
    display: block;
    margin: 0 auto;
}

footer {
    text-align: center;
    padding: 1.5rem;
    background-color: var(--card-bg-color);
    border-top: 1px solid var(--border-color-soft);
    margin-top: 2rem;
    font-size: 0.9rem;
    color: var(--footer-text-color);
    transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
main.container {
    opacity: 0; 
    animation: fadeIn 0.8s ease-out forwards;
}

.about-me-container {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    gap: 2rem;
}
.about-text { flex: 2; min-width: 300px; }
.about-photo { flex: 1; min-width: 200px; text-align: center; }
.profile-pic {
    width: 100%;
    max-width: 250px;
    height: auto;
    border-radius: 8px;
    border: 3px solid var(--border-color-hard);
    transition: border-color 0.3s ease;
}

#map {
    width: 100%;
    height: 450px;
    border-radius: 8px;
    border: 1px solid var(--border-color-hard);
    margin-top: 1rem;
    transition: border-color 0.3s ease;
}
.ol-layer canvas {
    transition: filter 0.3s ease;
}
body:not(.light-mode) .ol-layer canvas {
    filter: brightness(0.9) contrast(0.95);
}

.project-item {
    background-color: var(--project-item-bg);
    border: 1px solid var(--border-color-hard);
    border-radius: 5px;
    padding: 1rem 1.5rem;
    margin-bottom: 1rem;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}
.project-item h3 {
    color: var(--accent-color);
    margin-top: 0;
    transition: color 0.3s ease;
}

.theme-switch-wrapper {
    display: flex;
    align-items: center;
    margin-left: 1rem;
}
.theme-switch {
    position: relative;
    display: inline-block;
    width: 50px; 
    height: 24px;
}
.theme-switch input { 
    opacity: 0;
    width: 0;
    height: 0;
}
.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #555;
    transition: .4s;
    border-radius: 24px;
}
.slider:before {
    position: absolute;
    content: "";
    height: 16px; 
    width: 16px; 
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}
input:checked + .slider {
    background-color: var(--accent-color);
}
input:checked + .slider:before {
    transform: translateX(26px);
}
body.light-mode .slider {
    background-color: #ccc;
}