/* Base Styles */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --light-bg: #f9f9f9;
    --dark-text: #2c3e50;
    --transition: all 0.3s ease;
}

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

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

/* Header & Navigation */
header {
    background: var(--primary-color);
    padding: 1rem;
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    gap: 2rem;
    align-items: center;
}

nav a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    transition: var(--transition);
}

nav a:hover {
    background: var(--secondary-color);
}

.profile-img {
    border-radius: 50%;
    border: 3px solid white;
    transition: transform 0.3s ease;
}

.profile-img:hover {
    transform: scale(1.05);
}

/* Main Content Sections */
main {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.section-container {
    background: white;
    padding: 2rem;
    margin: 2rem 0;
    border-radius: 10px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.1);
}

.section-title {
    color: var(--primary-color);
    border-bottom: 3px solid var(--secondary-color);
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
}

/* Skills & Certificates */
.skills-list {
    columns: 2;
    gap: 2rem;
}

.skill-category {
    break-inside: avoid;
    margin-bottom: 2rem;
}

.certificate-item {
    margin-bottom: 2rem;
    padding: 1rem;
    background: var(--light-bg);
    border-left: 4px solid var(--secondary-color);
}

.certificate-image {
    width: 100%;
    max-width: 800px;
    height: auto;
    margin: 1rem 0;
    border-radius: 5px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

/* Responsive Design */
@media (max-width: 768px) {
    .skills-list {
        columns: 1;
    }
    
    nav {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .profile-img {
        width: 80px;
        height: 80px;
    }
}

/* Typography */
h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; color: var(--secondary-color); }

blockquote {
    font-style: italic;
    color: var(--accent-color);
    border-left: 3px solid var(--accent-color);
    padding-left: 1rem;
    margin: 1.5rem 0;
}

/* Footer */
footer {
    background: var(--primary-color);
    color: white;
    text-align: center;
    padding: 1.5rem;
    margin-top: 3rem;
}

footer a {
    color: var(--secondary-color);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}