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

:root {
    --bg-primary: #f5f5f5;
    --bg-secondary: #f5f5f5;
    --text-primary: #1a1a1a;
    --text-secondary: #666;
    --accent-color: #7c3aed;
    --accent-hover: #6d28d9;
    --card-bg: #f9f7f5;
    --card-border: #e8e4e0;
    --card-hover-bg: #f5f1ed;
    --card-hover-border: #ddd9d5;
}

[data-theme="dark"] {
    --bg-primary: #1a1a1a;
    --bg-secondary: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --accent-color: #7c3aed;
    --accent-hover: #8b5cf6;
    --card-bg: #2d2d2d;
    --card-border: #3a3a3a;
    --card-hover-bg: #333333;
    --card-hover-border: #444444;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.7;
    color: var(--text-primary);
    background: var(--bg-primary);
    min-height: 100vh;
    transition: background-color 0.6s ease-in-out, color 0.6s ease-in-out;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0;
}

header {
    padding: 6rem 2rem 3rem;
    text-align: center;
    background: var(--bg-secondary);
    position: relative;
    transition: background-color 0.6s ease-in-out;
}

.wave {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    display: inline-block;
    animation: wave 2.5s ease-in-out 1;
    transform-origin: 70% 70%;
}

@keyframes wave {
    0%, 100% { transform: rotate(0deg); }
    10%, 30% { transform: rotate(14deg); }
    20% { transform: rotate(-8deg); }
    40% { transform: rotate(-4deg); }
    50% { transform: rotate(10deg); }
    60% { transform: rotate(0deg); }
}

h1 {
    font-family: Georgia, 'Times New Roman', serif;
    font-size: 4rem;
    font-weight: 400;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    line-height: 1.1;
    transition: color 0.6s ease-in-out;
}

.title {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-weight: 400;
    letter-spacing: 0;
    transition: color 0.6s ease-in-out;
}

.tagline {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 3rem;
    line-height: 1.7;
    transition: color 0.6s ease-in-out;
}

.links {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 2rem;
}

.link-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    background: var(--accent-color);
    color: #ffffff;
    text-decoration: none;
    border-radius: 50px;
    border: none;
    transition: all 0.3s ease;
    font-weight: 500;
    font-size: 1rem;
}

.link-button:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
}

.theme-toggle {
    position: fixed;
    top: 2rem;
    right: 2rem;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 50%;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease, background-color 0.6s ease-in-out, border-color 0.6s ease-in-out;
    z-index: 1000;
}

.theme-toggle:hover {
    background: var(--card-hover-bg);
    border-color: var(--card-hover-border);
    transform: scale(1.1);
}

.theme-toggle svg {
    width: 24px;
    height: 24px;
    fill: var(--text-primary);
    transition: fill 0.6s ease-in-out;
}

main {
    padding: 3rem 2rem;
    background: var(--bg-primary);
    transition: background-color 0.6s ease-in-out;
}

.what-i-do-section {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 4rem;
    max-width: 1200px;
    margin: 0 auto;
    align-items: start;
}

.what-i-do-content h2 {
    font-size: 0.875rem;
    margin-bottom: 2rem;
    color: var(--accent-color);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    position: relative;
    padding-bottom: 0.75rem;
    transition: color 0.6s ease-in-out;
}

.what-i-do-content h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 2px;
    background: var(--accent-color);
    transition: background-color 0.6s ease-in-out;
}

.what-i-do-content p {
    color: var(--text-primary);
    font-size: 1rem;
    line-height: 1.7;
    margin: 0;
    transition: color 0.6s ease-in-out;
}

.skills-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.skill-card {
    padding: 0.65rem 1.25rem;
    background: var(--card-bg);
    border-radius: 50px;
    font-size: 0.9rem;
    color: var(--text-primary);
    border: 1px solid var(--card-border);
    transition: all 0.2s ease, background-color 0.6s ease-in-out, color 0.6s ease-in-out, border-color 0.6s ease-in-out;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.skill-card:hover {
    background: var(--card-hover-bg);
    border-color: var(--card-hover-border);
    transform: translateY(-2px);
}

@media (max-width: 768px) {
    h1 {
        font-size: 2.75rem;
    }

    .title {
        font-size: 1.25rem;
    }

    header {
        padding: 4rem 1.5rem 3rem;
    }

    main {
        padding: 2rem 1.5rem;
    }

    .what-i-do-section {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .wave {
        font-size: 2.5rem;
    }

    .skills-list {
        grid-template-columns: 1fr;
    }
}