@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@300;400;500;600&display=swap');

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

:root {
    --bg-color: #fafafa;
    --text-color: #333;
    --accent-color: #007acc;
    --border-color: #e0e0e0;
    --card-bg: #ffffff;
    --code-bg: #f5f5f5;
}

/* Dark mode variables */
[data-theme="dark"] {
    --bg-color: #1a1a1a;
    --text-color: #e0e0e0;
    --accent-color: #4da6ff;
    --border-color: #404040;
    --card-bg: #2d2d2d;
    --code-bg: #3a3a3a;
}

body {
    font-family: 'Fira Code', 'Courier New', monospace;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    scroll-behavior: smooth;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background: var(--card-bg);
    border-bottom: 2px solid var(--border-color);
    padding: 1rem 0;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--accent-color);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 400;
    transition: color 0.3s ease;
}

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

/* Dark mode toggle */
.theme-toggle {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 0.5rem 0.8rem;
    border-radius: 4px;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.theme-toggle .icon {
    font-size: 1rem;
}

/* Main Content */
main {
    margin-top: 80px;
}

section {
    padding: 4rem 0;
    border-bottom: 1px solid var(--border-color);
}

section:last-child {
    border-bottom: none;
}

h1, h2, h3 {
    margin-bottom: 1rem;
    font-weight: 600;
}

h1 {
    font-size: 2.5rem;
    color: var(--accent-color);
}

h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
}

h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 6rem 0;
}

.hero p {
    font-size: 1.1rem;
    margin: 1rem 0;
    color: #666;
}

.hero .subtitle {
    font-size: 1.3rem;
    color: var(--accent-color);
    margin-bottom: 2rem;
}

/* Skills Grid */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.skill-category {
    background: var(--card-bg);
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.skill-category h4 {
    color: var(--accent-color);
    margin-bottom: 1rem;
    font-size: 1rem;
}

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

.skill-list li {
    padding: 0.3rem 0;
    font-size: 0.9rem;
}

.skill-list li:before {
    content: "→ ";
    color: var(--accent-color);
}

/* Education & Experience */
.timeline-item {
    background: var(--card-bg);
    padding: 2rem;
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

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

.timeline-item .institution {
    color: #666;
    font-size: 0.9rem;
}

/* Projects Grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.project-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 2rem;
    transition: transform 0.3s ease;
}

.project-card:hover {
    transform: translateY(-2px);
}

.project-card .tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 1rem 0;
}

.tech-tag {
    background: var(--code-bg);
    padding: 0.3rem 0.8rem;
    border-radius: 3px;
    font-size: 0.8rem;
    color: var(--accent-color);
}

.project-links {
    margin-top: 1rem;
}

.project-links a {
    color: var(--accent-color);
    text-decoration: none;
    margin-right: 1rem;
    font-size: 0.9rem;
}

.project-links a:hover {
    text-decoration: underline;
}

/* Blog Section */
.blog-posts {
    margin-top: 2rem;
}

.blog-post {
    background: var(--card-bg);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.blog-post .date {
    color: #666;
    font-size: 0.9rem;
}

.blog-post h4 {
    margin: 0.5rem 0;
    color: var(--accent-color);
}

.blog-post a {
    color: var(--accent-color);
    text-decoration: none;
    font-size: 0.9rem;
}

/* Contact Form */
.contact-form {
    background: var(--card-bg);
    padding: 2rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    margin-top: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: inherit;
    font-size: 0.9rem;
    background: var(--bg-color);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.submit-btn {
    background: var(--accent-color);
    color: white;
    padding: 0.8rem 2rem;
    border: none;
    border-radius: 4px;
    font-family: inherit;
    font-size: 0.9rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.submit-btn:hover {
    background: #005a9e;
}

/* Footer */
footer {
    background: var(--card-bg);
    border-top: 2px solid var(--border-color);
    padding: 2rem 0;
    text-align: center;
    margin-top: 4rem;
}

.social-links {
    margin-top: 1rem;
}

.social-links a {
    color: var(--accent-color);
    text-decoration: none;
    margin: 0 1rem;
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        gap: 1rem;
    }

    .nav-links a {
        font-size: 0.9rem;
    }

    .theme-toggle {
        padding: 0.4rem 0.6rem;
        font-size: 0.8rem;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

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

    .projects-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero {
        padding: 4rem 0;
    }

    section {
        padding: 3rem 0;
    }
}