:root {
    --bg: #f8f9fa;
    --text: #1a1a1a;
    --accent: #0366d6;
    --card-bg: #ffffff;
    --sidebar-bg: #ffffff;
    --sidebar-width: 300px;
}

* {
    box-sizing: border-box;
}

body {
    font-family: system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    margin: 0;
    line-height: 1.6;
    font-size: 1.1rem;
}

.container {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    padding: 2rem 1.5rem;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.05);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.profile-photo {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--accent);
    margin-bottom: 1.5rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.sidebar h1 {
    margin: 0 0 0.5rem 0;
    font-size: 1.75rem;
    color: var(--text);
}

.sidebar .tagline {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 2rem;
    line-height: 1.4;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    width: 100%;
}

.contact-links a {
    color: var(--text);
    text-decoration: none;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    background: var(--bg);
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.contact-links a:hover {
    background: var(--accent);
    color: white;
    transform: translateX(4px);
}

.contact-links span {
    font-size: 1.1rem;
}

.social-icons {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    background: var(--sidebar-bg);
    margin-bottom: 1.5rem;
}

.social-icons .icon-link {
    padding: 0;
    background: transparent;
    border-radius: 50%;
    transition: all 0.2s;
}

.social-icons .icon-link:hover {
    background: transparent;
    transform: translateY(-2px);
}

.social-icons .icon-link:hover .icon {
    color: var(--accent);
}

.contact-links .icon,
.social-icons .icon {
    width: 1.5rem;
    height: 1.5rem;
    flex-shrink: 0;
}

.content {
    margin-left: var(--sidebar-width);
    flex: 1;
    padding: 2rem;
}

section {
    max-width: 900px;
    margin: 0 auto 3rem auto;
}

section h2 {
    margin-bottom: 1rem;
    border-bottom: 3px solid var(--accent);
    display: inline-block;
    padding-bottom: 0.25rem;
    font-size: 1.75rem;
}

section#about p {
    font-size: 1.15rem;
    line-height: 1.7;
}

section#about p a {
    color: var(--text);
    text-decoration: underline;
}

section#about p a:hover {
    color: var(--accent);
}

ul {
    padding-left: 1.5rem;
}

.card {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.card h3 {
    margin-top: 0;
    color: var(--accent);
}

.card a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
}

.card a:hover {
    text-decoration: underline;
}

footer {
    text-align: center;
    padding: 1rem;
    background: var(--card-bg);
    font-size: 0.85rem;
    color: #666;
    border-top: 1px solid #e0e0e0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        position: relative;
        height: auto;
        padding: 2rem 1rem;
    }

    .profile-photo {
        width: 150px;
        height: 150px;
    }

    .content {
        margin-left: 0;
        padding: 1rem;
    }

    section h2 {
        font-size: 1.5rem;
    }
}