:root {
    --bg-color: #ffffff;
    --text-color: #000000;
    --primary-color: #000000;
    --secondary-color: #666666;
    --accent-color: #d4c5b4;
    --card-bg: #ffffff;
    --nav-bg: rgba(255, 255, 255, 0.95);
    --tag-bg: #f5f5f5;
    --hover-color: #d4c5b4;
    --date-color: #666666;
}

[data-theme="dark"] {
    --bg-color: #000000;
    --text-color: #ffffff;
    --primary-color: #ffffff;
    --secondary-color: #888888;
    --accent-color: #1a1a1a;
    --card-bg: #000000;
    --nav-bg: rgba(0, 0, 0, 0.95);
    --tag-bg: #000000;
    --hover-color: #d4c5b4;
    --border-color: rgba(255, 255, 255, 0.1);
    --date-color: #888888;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background-color: #000000;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    transition: background-color 0.3s, color 0.3s;
}

header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background-color: var(--nav-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

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

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

.theme-toggle {
    background: none;
    border: none;
    color: var(--primary-color);
    cursor: pointer;
    font-size: 1.2rem;
    padding: 0.5rem;
}

main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem;
    padding-top: 5rem;
}

section {
    margin-bottom: 3rem;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s, transform 0.5s;
}

section.visible {
    opacity: 1;
    transform: translateY(0);
}

#hero {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: left;
}

.hero-content {
    max-width: 800px;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.wave {
    display: inline-block;
    animation: wave 2.5s infinite;
    transform-origin: 70% 70%;
}

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

.hero-content p {
    font-size: 1.2rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
    line-height: 1.8;
}

h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--primary-color);
}

.experience-container {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
    margin-top: 1.5rem;
}

.experience-item {
    position: relative;
}

.experience-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 1rem;
}

.experience-header h3 {
    color: var(--primary-color);
    font-size: 1.1rem;
    font-weight: 600;
}

.duration {
    color: var(--date-color);
    font-size: 0.9rem;
    font-weight: 500;
}

.experience-content {
    color: var(--secondary-color);
    font-size: 0.95rem;
    line-height: 1.6;
}

.experience-content p {
    margin-bottom: 0.75rem;
}

.experience-content p:last-child {
    margin-bottom: 0;
}

.experience-item h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.duration {
    color: var(--date-color);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    font-weight: 500;
}

.experience-item ul {
    list-style-position: inside;
    color: var(--secondary-color);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
    margin-top: 1.5rem;
}

.project-card {
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
    min-height: 220px;
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-5px);
    border-color: rgba(255, 255, 255, 0.2);
}

[data-theme="dark"] .project-card:hover {
    border-color: rgba(255, 255, 255, 0.2);
}

[data-theme="light"] .project-card:hover {
    border-color: rgba(0, 0, 0, 0.1);
}

.project-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.project-card p {
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
    line-height: 1.6;
    flex-grow: 1;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.project-tag {
    background-color: var(--tag-bg);
    color: var(--secondary-color);
    padding: 0.3rem 0.8rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border: 1px solid var(--border-color);
}

.project-link {
    display: inline-block;
    padding: 0.5rem 1rem;
    background-color: var(--accent-color);
    color: white;
    text-decoration: none;
    border-radius: 5px;
    transition: background-color 0.3s;
}

.project-link:hover {
    background-color: #0056b3;
}

.skills-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.skill-category h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.skill-items {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.skill-items span {
    background-color: var(--card-bg);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    color: var(--secondary-color);
}

footer {
    text-align: center;
    padding: 2rem;
    color: var(--secondary-color);
    background-color: var(--card-bg);
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    main {
        padding: 1rem;
    }
}