/* General Body Styles */
body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: #f8f9fa;
    color: #212529;
    margin: 0;
    padding: 0;
}

/* Header Styles */
header {
    background-color: #ffffff;
    padding: 15px 40px;
    border-bottom: 1px solid #dee2e6;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

header h1 {
    margin: 0;
    font-size: 1.5em;
    color: #343a40;
}

header a {
    text-decoration: none;
    color: #007bff;
    font-weight: 600;
    transition: color 0.3s;
}

header a:hover {
    color: #0056b3;
}

/* Main Layout */
.container {
    display: flex;
    max-width: 1200px;
    margin: 40px auto;
    gap: 30px;
    padding: 0 20px;
}

/* --- Left Column (Sticky Summary) --- */
.summary-container {
    width: 350px;
    flex-shrink: 0;
}

.summary-box {
    position: sticky;
    top: 120px; /* Adjust based on header height */
    background-color: #fff;
    border: 1px solid #e9ecef;
    border-radius: 8px;
    padding: 25px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.summary-box h1 {
    font-size: 2em;
    margin-top: 0;
    margin-bottom: 10px;
}

.summary-box .role {
    font-size: 1.1em;
    color: #6c757d;
    margin-bottom: 20px;
    font-weight: 500;
}

.summary-section {
    margin-bottom: 20px;
}

.summary-section h3 {
    font-size: 1.2em;
    color: #343a40;
    margin-bottom: 10px;
    border-bottom: 2px solid #007bff;
    padding-bottom: 5px;
}

.summary-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.summary-section ul li {
    margin-bottom: 8px;
}

.tech-stack-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tech-stack-grid span {
    background-color: #e9ecef;
    color: #495057;
    padding: 5px 10px;
    border-radius: 4px;
    font-size: 0.9em;
}

.project-links a {
    display: block;
    background-color: #007bff;
    color: #fff;
    text-align: center;
    padding: 12px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: bold;
    margin-bottom: 10px;
    transition: background-color 0.3s;
}

.project-links a:hover {
    background-color: #0056b3;
}

.project-links a.github {
    background-color: #343a40;
}

.project-links a.github:hover {
    background-color: #23272b;
}


/* --- Right Column (Main Content) --- */
.content-container {
    flex-grow: 1;
    background-color: #fff;
    border: 1px solid #e9ecef;
    border-radius: 8px;
    padding: 40px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.content-section {
    margin-bottom: 40px;
}

.content-section h2 {
    font-size: 1.8em;
    color: #343a40;
    margin-bottom: 15px;
}

.content-section p, .content-section ul {
    font-size: 1.1em;
    line-height: 1.8;
    color: #495057;
}

.content-section ul {
    padding-left: 20px;
}

.how-steps .step {
    margin-bottom: 25px;
}

.how-steps h4 {
    font-size: 1.3em;
    color: #007bff;
    margin-bottom: 5px;
}

.result-section {
    border-top: 1px solid #dee2e6;
    padding-top: 20px;
}

.result-section .highlight {
    background-color: #fff3cd;
    padding: 20px;
    border-radius: 5px;
    border-left: 5px solid #ffc107;
    margin-bottom: 20px;
}

/* Footer Styles */
footer {
    text-align: center;
    padding: 30px;
    background-color: #f8f9fa;
    border-top: 1px solid #dee2e6;
    color: #6c757d;
    font-size: 0.9em;
    margin-top: 40px;
}

/* Responsive */
@media (max-width: 992px) {
    .container {
        flex-direction: column;
    }
    .summary-container {
        width: 100%;
    }
    .summary-box {
        position: static;
    }
}