:root {
    --bg-color: #0d1117;
    --card-bg: #161b22;
    --text-main: #c9d1d9;
    --text-secondary: #8b949e;
    --accent: #238636;
    --accent-hover: #2ea043;
    --border: #30363d;
    --title-blue: #58a6ff;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    margin: 0;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
header {
    text-align: center;
    padding: 60px 0;
    border-bottom: 1px solid var(--border);
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    color: #fff;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.2rem;
}

.social-links {
    margin-top: 20px;
}

.social-links a {
    color: var(--text-main);
    font-size: 1.5rem;
    margin: 0 15px;
    transition: color 0.3s ease;
}

.social-links a:hover {
    color: var(--title-blue);
}

/* Skills */
.section-title {
    margin-top: 50px;
    font-size: 1.5rem;
    border-bottom: 2px solid var(--border);
    padding-bottom: 10px;
    display: inline-block;
    color: #fff;
}

.skills-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 20px;
}

.skill-tag {
    background: var(--card-bg);
    border: 1px solid var(--border);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.skill-tag:hover {
    background: var(--border);
    color: var(--text-main);
}

/* Projects Grid */
.projects-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    margin-top: 30px;
}

@media (min-width: 768px) {
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.project-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 24px;
    transition: transform 0.2s ease, border-color 0.2s ease;

    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-5px);
    border-color: var(--title-blue);
}

.project-title {
    font-size: 1.25rem;
    font-weight: bold;
    margin-bottom: 12px;
    color: var(--title-blue);
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 16px;
    font-size: 0.85rem;
    color: var(--text-main);
}

.tech-stack span {
    display: flex;
    align-items: center;
    gap: 6px;
}

.project-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
    flex-grow: 1;
}

.btn {
    display: inline-block;
    background-color: var(--accent);
    color: white;
    padding: 8px 18px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: bold;
    font-size: 0.9rem;
    align-self: flex-start;
    transition: background-color 0.2s ease;
}

.btn:hover {
    background-color: var(--accent-hover);
}

/* Footer */
footer {
    text-align: center;
    margin-top: 80px;
    padding: 40px 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
    border-top: 1px solid var(--border);
}