/* --- CSS Variables and Basic Reset --- */
:root {
    --primary-color: #0a66c2; /* Professional Blue (LinkedIn) */
    --dark-color: #1d2226;
    --light-color: #f4f4f4;
    --text-color: #333;
    --white-color: #ffffff;
    --font-family: 'Poppins', sans-serif;
    --grey-color: #6c757d;
}

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

body {
    font-family: var(--font-family);
    line-height: 1.6;
    background-color: var(--white-color);
    color: var(--text-color);
}

/* --- Utility Classes --- */
.container {
    max-width: 1100px;
    margin: auto;
    padding: 0 2rem;
    overflow: hidden;
}

.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 600;
    transition: background-color 0.3s ease;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--white-color);
    border: 1px solid var(--primary-color);
}

.btn-primary:hover {
    background-color: #004182;
}

.btn-secondary {
    background-color: var(--white-color);
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

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

/* --- Header / Hero Section --- */
.hero {
    background-color: var(--light-color);
    text-align: center;
    padding: 4rem 0;
}

.hero-title {
    font-size: 3rem;
    margin-bottom: 0.5rem;
    color: var(--dark-color);
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.hero-text {
    max-width: 600px;
    margin: 0 auto 2rem;
}

.hero-buttons .btn {
    margin: 0 0.5rem;
}

/* --- Sections General Styling --- */
section {
    padding: 4rem 0;
}

section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--dark-color);
}

/* --- Experience Section --- */
.experience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.card {
    background: var(--white-color);
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 2rem;
    box-shadow: 0 4px 8px rgba(0,0,0,0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.1);
}

.card h3 {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.card-subtitle {
    font-size: 0.9rem;
    color: #777;
    margin-bottom: 1rem;
}

.card ul {
    list-style-position: inside;
    padding-left: 0;
}

.card ul li {
    margin-bottom: 0.5rem;
}

/* --- Skills Section --- */
.skills {
    background-color: var(--light-color);
}

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

.skill-category h4 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--dark-color);
}

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

.skill-category ul li {
    background: var(--white-color);
    padding: 0.5rem;
    margin-bottom: 0.5rem;
    border-radius: 5px;
    border: 1px solid #eee;
}

/* --- Contact Section --- */
.contact {
    text-align: center;
}

.contact p {
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

/* --- Footer --- */
footer {
    background-color: var(--grey-color);
    color: var(--white-color);
    text-align: center;
    padding: 2rem 0;
}

.footer-links a {
    color: var(--white-color);
    text-decoration: none;
    margin: 0 1rem;
    transition: color 0.3s ease;
}

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

.footer-links {
    margin-bottom: 1rem;
}

/* --- Responsive Design --- */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    section h2 {
        font-size: 2rem;
    }

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