:root {
    --primary: #ECF0F1;
    --secondary: #1A1A1A;
    --accent: #5DADE2;
    --text: #ECF0F1;
    --text-light: #BDC3C7;
    --bg: #0F0F0F;
    --border: #333333;
    --theme-icon-dark--display: none;
    --theme-icon-light--display: block;
}

[data-theme="light"] {
    --primary: #2C3E50;
    --secondary: #ECF0F1;
    --accent: #3498DB;
    --text: #2C3E50;
    --text-light: #7F8C8D;
    --bg: #FFFFFF;
    --border: #E0E0E0;
    --theme-icon-dark--display: block;
    --theme-icon-light--display: none;
}

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

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

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 40px;
}

nav {
    padding: 30px 0;
    border-bottom: 1px solid var(--border);
}

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

.logo {
    font-size: 18px;
    font-weight: 600;
    color: var(--text);
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-links a {
    color: var(--text-light);
    text-decoration: none;
    font-size: 14px;
}

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

.theme-toggle {
    background: none;
    border: 1px solid var(--border);
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    color: var(--text-light);
    font-size: 14px;
}

.theme-toggle:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.theme-toggle .theme-icon-dark {
    display: var(--theme-icon-dark--display)
}

.theme-toggle .theme-icon-light {
    display: var(--theme-icon-light--display)
}

section {
    padding: 80px 0;
    border-bottom: 1px solid var(--border);
}

section:last-of-type {
    border-bottom: none;
}

h1 {
    font-size: 48px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text);
}

h2 {
    font-size: 14px;
    font-weight: 400;
    color: var(--text-light);
    margin-bottom: 40px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text);
}

p {
    font-size: 16px;
    color: var(--text-light);
    margin-bottom: 20px;
    max-width: 650px;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    margin-top: 40px;
}

.skill-list {
    list-style: none;
}

.skill-list li {
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
    font-size: 15px;
    color: var(--text-light);
}

.skill-list li:last-child {
    border-bottom: none;
}

.project {
    margin-bottom: 60px;
    padding-bottom: 60px;
    border-bottom: 1px solid var(--border);
}

.project:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.project-meta {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 20px;
}

.tech-stack {
    font-size: 14px;
    color: var(--text-light);
    margin-top: 15px;
}

.tech-label {
    font-weight: 600;
    color: var(--text);
    margin-right: 8px;
}

.project-links {
    display: flex;
    gap: 20px;
    margin-top: 15px;
    flex-wrap: wrap;
}

.project-link {
    color: var(--accent);
    text-decoration: none;
    font-size: 14px;
}

.project-link:hover {
    text-decoration: underline;
}

.contact-list {
    list-style: none;
    margin-top: 40px;
}

.contact-list li {
    padding: 15px 0;
    border-bottom: 1px solid var(--border);
}

.contact-list li:last-child {
    border-bottom: none;
}

.contact-list a {
    color: var(--text);
    text-decoration: none;
    font-size: 16px;
}

.contact-list a:hover {
    color: var(--accent);
}

.contact-label {
    font-size: 12px;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 5px;
    display: block;
}

footer {
    padding: 40px 0;
    text-align: center;
    border-top: 1px solid var(--border);
}

footer p {
    font-size: 14px;
    color: var(--text-light);
    margin: 0;
}

@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }

    h1 {
        font-size: 36px;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .nav-links {
        gap: 15px;
    }

    .nav-links a:not(.theme-toggle) {
        display: none;
    }
}