/* 日本职场风格Portfolio - CSS */
:root {
    /* 日本传统色彩 */
    --color-primary: #2c3e50; /* 紺色 - 深蓝 */
    --color-secondary: #c0392b; /* 赤色 - 红色 */
    --color-accent: #3498db; /* 水色 - 浅蓝 */
    --color-light: #f8f9fa;
    --color-dark: #212529;
    --color-gray: #6c757d;
    --color-gray-light: #e9ecef;
    
    /* 日本美学色彩 */
    --color-sakura: #ffb7c5; /* 桜色 */
    --color-washi: #f5f5dc; /* 和紙色 */
    --color-bamboo: #6b8e23; /* 竹色 */
    --color-ink: #1a1a1a; /* 墨色 */
    
    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;
    
    /* 字体 */
    --font-heading: 'Noto Sans JP', sans-serif;
    --font-body: 'Zen Maru Gothic', sans-serif;
    
    /* 边框半径 */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 16px;
    
    /* 阴影 */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.1);
    
    /* 过渡 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* 重置与基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--color-dark);
    background-color: var(--color-light);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* 桜の花びらエフェクト */
#sakura-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
}

.sakura {
    position: absolute;
    background-color: var(--color-sakura);
    border-radius: 50% 50% 50% 0;
    opacity: 0.7;
    animation: fall linear infinite;
}

@keyframes fall {
    0% {
        transform: translateY(-100px) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 0.7;
    }
    90% {
        opacity: 0.7;
    }
    100% {
        transform: translateY(100vh) rotate(360deg);
        opacity: 0;
    }
}

/* ヘッダー */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition-normal);
}

.header.scrolled {
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-md);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
}

.nav-brand {
    display: flex;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    text-decoration: none;
}

.logo-kanji {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
    background: linear-gradient(45deg, var(--color-primary), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--color-dark);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--color-dark);
    font-family: var(--font-heading);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    transition: var(--transition-fast);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: var(--transition-normal);
    transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 80%;
}

.language-switch {
    display: flex;
    gap: var(--spacing-xs);
    margin-left: var(--spacing-md);
}

.lang-btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--color-gray-light);
    background: none;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-family: var(--font-heading);
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.lang-btn:hover {
    border-color: var(--color-primary);
}

.lang-btn.active {
    background-color: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background-color: var(--color-dark);
    border-radius: 2px;
    transition: var(--transition-normal);
}

/* ヒーローセクション */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-top: 80px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(248, 249, 250, 0.9) 100%);
    z-index: -1;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.hero-text {
    animation: fadeInUp 1s ease;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.greeting {
    display: block;
    font-size: 2rem;
    font-weight: 400;
    color: var(--color-gray);
}

.name {
    display: block;
    background: linear-gradient(45deg, var(--color-primary), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.title {
    display: block;
    font-size: 2rem;
    font-weight: 400;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--color-gray);
    margin-bottom: var(--spacing-md);
}

.experience {
    color: var(--color-secondary);
    font-weight: 500;
}

.role {
    color: var(--color-primary);
    font-weight: 600;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--color-gray);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
}

.btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-md);
    font-family: var(--font-heading);
    font-weight: 500;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: var(--transition-normal);
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background-color: var(--color-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.btn-outline:hover {
    background-color: var(--color-primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.hero-visual {
    animation: fadeInRight 1s ease;
}

.code-animation {
    background-color: var(--color-dark);
    color: var(--color-light);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    font-family: 'Courier New', monospace;
    font-size: 1.1rem;
    line-height: 1.8;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.code-animation::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(to bottom, var(--color-accent), var(--color-secondary));
}

.code-line {
    opacity: 0;
    animation: typeLine 0.5s ease forwards;
}

.code-line:nth-child(1) { animation-delay: 0.5s; }
.code-line:nth-child(2) { animation-delay: 1s; }
.code-line:nth-child(3) { animation-delay: 1.5s; }
.code-line:nth-child(4) { animation-delay: 2s; }
.code-line:nth-child(5) { animation-delay: 2.5s; }
.code-line:nth-child(6) { animation-delay: 3s; }

.code-keyword {
    color: #569cd6;
}

.code-var {
    color: #4ec9b0;
}

.code-prop {
    color: #9cdcfe;
}

.code-string {
    color: #ce9178;
}

.code-number {
    color: #b5cea8;
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    animation: bounce 2s infinite;
}

.mouse {
    width: 30px;
    height: 50px;
    border: 2px solid var(--color-gray);
    border-radius: 15px;
    margin: 0 auto var(--spacing-xs);
    position: relative;
}

.wheel {
    width: 4px;
    height: 8px;
    background-color: var(--color-primary);
    border-radius: 2px;
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 2s infinite;
}

.scroll-indicator p {
    font-size: 0.9rem;
    color: var(--color-gray);
    font-family: var(--font-heading);
}

/* セクション共通 */
.section {
    padding: var(--spacing-xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.section-title-en {
    display: block;
    font-size: 1rem;
    font-weight: 400;
    color: var(--color-gray);
    letter-spacing: 2px;
    text-transform: uppercase;
}

.section-title-ja {
    display: block;
}

.section-line {
    width: 60px;
    height: 3px;
    background: linear-gradient(to right, var(--color-primary), var(--color-accent));
    margin: 0 auto;
    border-radius: 2px;
}

/* 経歴セクション */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background-color: var(--color-gray-light);
}

.timeline-item {
    display: flex;
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.timeline-item:nth-child(odd) {
    flex-direction: row-reverse;
}

.timeline-date {
    flex: 1;
    padding: var(--spacing-sm);
    text-align: right;
    font-family: var(--font-heading);
    font-weight: 600;
    color: var(--color-primary);
}

.timeline-item:nth-child(odd) .timeline-date {
    text-align: left;
}

.timeline-content {
    flex: 2;
    padding: var(--spacing-md);
    background-color: white;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
    position: relative;
    margin: 0 var(--spacing-md);
}

.timeline-content::before {
    content: '';
    position: absolute;
    top: 20px;
    width: 20px;
    height: 20px;
    background-color: var(--color-primary);
    border-radius: 50%;
}

.timeline-item:nth-child(even) .timeline-content::before {
    left: -30px;
}

.timeline-item:nth-child(odd) .timeline-content::before {
    right: -30px;
}

.timeline-title {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.timeline-company {
    color: var(--color-secondary);
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.timeline-description {
    color: var(--color-gray);
    line-height: 1.7;
}

/* スキルセクション */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.skill-category {
    background-color: white;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
}

.skill-category-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--color-gray-light);
}

.skill-items {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.skill-item {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.5s ease forwards;
}

.skill-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-xs);
}

.skill-name {
    font-family: var(--font-heading);
    font-weight: 500;
    color: var(--color-dark);
}

.skill-percent {
    font-family: var(--font-heading);
    font-weight: 600;
    color: var(--color-primary);
}

.skill-bar {
    height: 8px;
    background-color: var(--color-gray-light);
    border-radius: 4px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: linear-gradient(to right, var(--color-primary), var(--color-accent));
    width: 0;
    border-radius: 4px;
    transition: width 1.5s ease;
}

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

.project-card {
    background-color: white;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.project-image {
    height: 200px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-tech {
    position: absolute;
    bottom: var(--spacing-sm);
    left: var(--spacing-sm);
    display: flex;
    gap: var(--spacing-xs);
}

.tech-tag {
    background-color: rgba(255, 255, 255, 0.9);
    color: var(--color-primary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-size: 0.8rem;
    font-weight: 500;
}

.project-content {
    padding: var(--spacing-lg);
}

.project-title {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.project-description {
    color: var(--color-gray);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.project-links {
    display: flex;
    gap: var(--spacing-md);
}

.project-link {
    color: var(--color-primary);
    text-decoration: none;
    font-family: var(--font-heading);
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: var(--transition-fast);
}

.project-link:hover {
    color: var(--color-accent);
}

/* 連絡先セクション */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.contact-icon {
    width: 50px;
    height: 50px;
    background-color: var(--color-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.contact-details {
    flex: 1;
}

.contact-title {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.contact-text {
    color: var(--color-gray);
    line-height: 1.7;
}

.contact-form {
    background-color: white;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--color-gray-light);
    border-radius: var(--border-radius-md);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(44, 62, 80, 0.1);
}

/* フッター */
.footer {
    background-color: var(--color-primary);
    color: white;
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.footer-logo .logo-kanji {
    -webkit-text-fill-color: white;
    background: none;
    color: white;
}

.footer-logo .logo-text {
    color: white;
}

.footer-motto {
    font-style: italic;
    color: rgba(255, 255, 255, 0.8);
    margin-top: var(--spacing-xs);
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-link {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition-fast);
}

.footer-link:hover {
    color: white;
}

.footer-social {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: var(--transition-fast);
}

.social-link:hover {
    background-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.copyright {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-xs);
}

.footer-note {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
}

/* アニメーション */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes typeLine {
    from {
        opacity: 0;
        transform: translateX(-10px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

@keyframes scroll {
    0% {
        transform: translateX(-50%) translateY(0);
        opacity: 1;
    }
    100% {
        transform: translateX(-50%) translateY(20px);
        opacity: 0;
    }
}

/* レスポンシブデザイン */
@media (max-width: 992px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--spacing-lg);
        text-align: center;
    }
    
    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        flex-direction: column;
        background-color: white;
        padding: var(--spacing-lg);
        box-shadow: var(--shadow-md);
        transition: var(--transition-normal);
        gap: var(--spacing-md);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hamburger.active .bar:nth-child(1) {
        transform: rotate(45deg) translate(6px, 6px);
    }
    
    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active .bar:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }
    
    .timeline::before {
        left: 30px;
    }
    
    .timeline-item {
        flex-direction: row !important;
    }
    
    .timeline-date {
        flex: 0 0 100px;
        text-align: left !important;
    }
    
    .timeline-content {
        margin-left: 60px;
    }
    
    .timeline-content::before {
        left: -40px !important;
        right: auto !important;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 576px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
}