:root {
    --bg-color: #0a0a0a;
    --text-color: #e0e0e0;
    --secondary-text: #a0a0a0;
    --accent-color: #ffffff;
    --button-bg: #1a1a1a;
    --button-hover: #2a2a2a;
    --border-color: #333;
}

[data-theme="light"] {
    --bg-color: #ffffff;
    --text-color: #1a1a1a;
    --secondary-text: #666666;
    --accent-color: #000000;
    --button-bg: #f5f5f5;
    --button-hover: #e5e5e5;
    --border-color: #ddd;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.3s ease, color 0.3s ease;
    padding: 2rem;
}

main {
    width: 100%;
    max-width: 600px;
}

.container {
    text-align: center;
}

.profile-pic {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 1.5rem auto;
    display: block;
    border: 3px solid var(--accent-color);
    transition: border-color 0.3s ease;
}

h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--accent-color);
    letter-spacing: -0.02em;
}

.bio {
    font-size: 1.125rem;
    color: var(--secondary-text);
    margin-bottom: 3rem;
    line-height: 1.6;
}

.links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-width: 300px;
    margin: 0 auto;
}

.link-button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    background-color: var(--button-bg);
    color: var(--text-color);
    text-decoration: none;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.link-button:hover {
    background-color: var(--button-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.link-button svg {
    width: 20px;
    height: 20px;
}

.theme-toggle {
    position: fixed;
    top: 2rem;
    right: 2rem;
    background: var(--button-bg);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

.theme-toggle:hover {
    background-color: var(--button-hover);
    transform: scale(1.05);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
    color: var(--text-color);
}

.sun-icon {
    display: none;
}

.moon-icon {
    display: block;
}

[data-theme="light"] .sun-icon {
    display: block;
}

[data-theme="light"] .moon-icon {
    display: none;
}

@media (max-width: 640px) {
    h1 {
        font-size: 2.25rem;
    }
    
    .bio {
        font-size: 1rem;
    }
    
    .theme-toggle {
        top: 1rem;
        right: 1rem;
        width: 40px;
        height: 40px;
    }
}