:root {
    --primary: #3498db;
    --secondary: #2ecc71;
    --dark: #2c3e50;
    --light: #ecf0f1;
    --accent: #e74c3c;
    --text: #333333;
    --background: #ffffff;
    --pink: #ff9a9e;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Helvetica Neue', 'Arial', 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', 'Meiryo', sans-serif;
}

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

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

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ヘッダー */
header {
    background-color: var(--dark);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
}

.logo .name-highlight {
    color: var(--primary);
}

.logo span {
    color: var(--pink);
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: white;
    font-weight: 500;
}

.nav-links a:hover {
    color: var(--pink);
}

.burger {
    display: none;
    cursor: pointer;
}

.burger div {
    width: 25px;
    height: 3px;
    background-color: white;
    margin: 5px;
    transition: all 0.3s ease;
}

/* ヒーローセクション */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.1) 0%, rgba(46, 204, 113, 0.1) 100%);
}

.hero-content {
    max-width: 800px;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--dark);
}

.hero h1 span.name-highlight {
    color: var(--primary);
}

.hero h1 span {
    color: var(--pink);
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: var(--text);
}

.btn {
    display: inline-block;
    background-color: var(--primary);
    color: white;
    padding: 0.8rem 2rem;
    border-radius: 50px;
    font-weight: 500;
    box-shadow: 0 4px 6px rgba(52, 152, 219, 0.2);
    transition: all 0.3s ease;
    margin-bottom: 1rem;
}

.btn:hover {
    background-color: var(--secondary);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 6px 8px rgba(46, 204, 113, 0.2);
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
    margin-left: 1rem;
}

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

/* セクション共通 */
section {
    padding: 6rem 0;
}

.section-title {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title h2 {
    font-size: 2.5rem;
    color: var(--dark);
    margin-bottom: 1rem;
}

.section-title p {
    color: var(--text);
    max-width: 600px;
    margin: 0 auto;
}

/* プロジェクトセクション */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
}

.project-card {
    background-color: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.project-image {
    height: 200px;
    background-color: var(--light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--dark);
    font-size: 1.2rem;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.project-content {
    padding: 1.5rem;
}

.project-content h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--dark);
}

.project-content p {
    color: var(--text);
    margin-bottom: 1rem;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.tag {
    background-color: var(--light);
    padding: 0.3rem 0.8rem;
    border-radius: 50px;
    font-size: 0.8rem;
    color: var(--dark);
}

/* スキルセクション */
.skills {
    background-color: var(--light);
}

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

.skill-card {
    background-color: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    text-align: center;
    transition: transform 0.3s ease;
}

.skill-card:hover {
    transform: translateY(-5px);
}

.skill-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--primary);
}

.skill-card h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--dark);
}

.skill-card p {
    color: var(--text);
    font-size: 0.9rem;
}

/* ソーシャルセクション */
.social-content {
    text-align: center;
    padding: 2rem 0;
}

.social-content h3 {
    margin-bottom: 2rem;
    font-size: 1.8rem;
    color: var(--dark);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.contact-link {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    transition: all 0.3s ease;
}

.contact-link:hover {
    background-color: var(--secondary);
    transform: translateY(-5px);
}

.contact-link svg,
.contact-link img {
    width: 28px;
    height: 28px;
    fill: white;
}

/* フッター */
footer {
    background-color: var(--dark);
    color: white;
    padding: 3rem 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
}

.footer-logo .name-highlight {
    color: var(--primary);
}

.footer-logo span {
    color: var(--pink);
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: white;
}

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

.footer-bottom {
    margin-top: 2rem;
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* レスポンシブデザイン */
@media screen and (max-width: 768px) {
    .nav-links {
        position: absolute;
        right: 0;
        height: 92vh;
        top: 8vh;
        background-color: var(--dark);
        display: flex;
        flex-direction: column;
        align-items: center;
        width: 50%;
        transform: translateX(100%);
        transition: transform 0.5s ease-in;
        box-shadow: -5px 0 10px rgba(0, 0, 0, 0.3);
        padding: 2rem;
        gap: 2rem;
    }
    
    .nav-active {
        transform: translateX(0%);
    }
    
    .burger {
        display: block;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .btn-outline {
        margin-left: 0;
        margin-top: 1rem;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 2rem;
    }
}