:root {
        --primary: #2563eb;
        --secondary: #1e293b;
        --bg: #f8fafc;
        --text: #334155;
        --card-bg: #ffffff;
    }

    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
        font-family: 'Segoe UI', system-ui, sans-serif;
    }

    body {
        background-color: var(--bg);
        color: var(--text);
        line-height: 1.6;
    }

    /* Header / Hero Section */
    header {
        background-color: var(--secondary);
        color: white;
        padding: 4rem 2rem;
        text-align: center;
    }

    .profile-container {
        max-width: 800px;
        margin: 0 auto;
    }

    h1 {
        font-size: 2.5rem;
        margin-bottom: 0.5rem;
    }

    .role {
        font-size: 1.25rem;
        color: #94a3b8;
        margin-bottom: 1.5rem;
    }

    .social-links a {
        color: white;
        font-size: 1.5rem;
        margin: 0 10px;
        transition: color 0.3s;
    }

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

    /* Main Content */
    main {
        max-width: 900px;
        margin: -30px auto 0;
        padding: 0 1rem 3rem;
    }

    section {
        background: var(--card-bg);
        border-radius: 8px;
        padding: 2rem;
        margin-bottom: 2rem;
        box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    }

    h2 {
        color: var(--secondary);
        border-bottom: 2px solid var(--primary);
        padding-bottom: 0.5rem;
        margin-bottom: 1.5rem;
        display: inline-block;
    }

    /* Skills Grid */
    .skills-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
        gap: 1rem;
    }

    .skill-tag {
        background: #eff6ff;
        color: var(--primary);
        padding: 0.5rem;
        text-align: center;
        border-radius: 6px;
        font-weight: 600;
        border: 1px solid #bfdbfe;
    }

    /* Projects Timeline */
    .project-card {
        border-left: 4px solid var(--primary);
        padding-left: 1.5rem;
        margin-bottom: 2rem;
    }

    .project-card:last-child {
        margin-bottom: 0;
    }

    .project-title {
        font-size: 1.25rem;
        font-weight: bold;
        color: var(--secondary);
        text-decoration: none;
    }

    .project-tech {
        font-size: 0.9rem;
        color: var(--primary);
        margin-bottom: 0.5rem;
        font-style: italic;
    }

    /* Theme Toggle */
    .theme-toggle {
        position: fixed;
        top: 20px;
        right: 20px;
        background: rgba(255, 255, 255, 0.2);
        border: none;
        color: white;
        padding: 10px;
        border-radius: 50%;
        cursor: pointer;
        backdrop-filter: blur(5px);
    }

    @media (max-width: 600px) {
        h1 {
            font-size: 2rem;
        }

        header {
            padding: 3rem 1rem;
        }
    }

    /* Dark Mode Support */
    body.dark-mode {
        --bg: #0f172a;
        --text: #cbd5e1;
        --card-bg: #202030;
    }

    body.dark-mode h2 {
        color: #f8fafc;
    }

    body.dark-mode .project-title {
        color: #f8fafc;
    }

    body.dark-mode .skill-tag {
        background: #334155;
        border-color: #475569;
        color: #60a5fa;
    }