:root {
    --primary-color: #2C5282;
    --secondary-color: #4299E1;
    --text-color: #1A202C;
    --accent-color: #4299E1;
    --card-bg: #F8FAFC;
    --hover-color: #EDF2F7;
}

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

body {
    font-family: 'Segoe UI', 'Malgun Gothic', sans-serif;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    padding: 2rem;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    background: var(--card-bg);
    padding: 3rem;
    border-radius: 1rem;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(44, 82, 130, 0.1);
}

header {
    text-align: center;
    margin-bottom: 3rem;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

h2 {
    color: var(--accent-color);
    margin: 2.5rem 0 1.5rem;
    font-size: 1.8rem;
    border-bottom: 2px solid var(--accent-color);
    padding-bottom: 0.5rem;
}

h3 {
    color: var(--accent-color);
    margin: 1.5rem 0 1rem;
    font-size: 1.4rem;
}

section {
    margin-bottom: 3rem;
}

ul {
    list-style: none;
    padding-left: 1rem;
}

li {
    margin: 0.8rem 0;
}

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

.intro {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 2.5rem;
}

strong {
    color: var(--accent-color);
    font-weight: bold;
}

.project-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 0.5rem;
    margin-bottom: 1.5rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid rgba(44, 82, 130, 0.1);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.05);
}

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

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

.activities ul {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

blockquote {
    font-style: italic;
    padding: 1.5rem;
    border-left: 4px solid var(--accent-color);
    margin: 2rem 0;
    background: var(--card-bg);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.05);
    border-radius: 0 0.5rem 0.5rem 0;
}

footer {
    text-align: center;
    margin-top: 3rem;
}

/* 연락처 폼 스타일 */
.contact-form {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 0.5rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.05);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-color);
    font-weight: bold;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #CBD5E0;
    border-radius: 0.375rem;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(66, 153, 225, 0.1);
}

.submit-btn {
    background-color: var(--accent-color);
    color: white;
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: 0.375rem;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
    width: 100%;
}

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

.form-status {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 0.375rem;
    text-align: center;
}

.form-status.success {
    background-color: #C6F6D5;
    color: #2F855A;
}

.form-status.error {
    background-color: #FED7D7;
    color: #C53030;
}

.social-links {
    margin-top: 2rem;
}

@media (max-width: 768px) {
    body {
        padding: 1rem;
    }
    
    .container {
        padding: 1.5rem;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .activities ul {
        grid-template-columns: 1fr;
    }

    .contact-form {
        padding: 1.5rem;
    }
}