/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: #000;
    background: #fff;
    overflow-x: hidden;
}

html {
    scroll-behavior: smooth;
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid #e0e0e0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 1px;
    color: #000;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-link {
    color: #666;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.3s;
    letter-spacing: 0.5px;
}

.nav-link:hover,
.nav-link.active {
    color: #000;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: #000;
    transition: all 0.3s;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 100px 40px 60px;
}

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

.profile-image-container {
    margin-bottom: 40px;
}

.profile-image {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    filter: grayscale(100%);
    transition: filter 0.5s;
}

.profile-image:hover {
    filter: grayscale(0%);
}

.hero-title {
    font-size: 72px;
    font-weight: 700;
    margin-bottom: 10px;
    letter-spacing: -2px;
}

.hero-subtitle {
    font-size: 24px;
    font-weight: 300;
    color: #666;
    margin-bottom: 20px;
    letter-spacing: 4px;
}

.hero-description {
    font-size: 20px;
    color: #666;
    margin-bottom: 40px;
}

.hero-tags {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

.tag {
    padding: 10px 20px;
    background: #f5f5f5;
    border-radius: 20px;
    font-size: 14px;
    color: #000;
    font-weight: 500;
}

/* Section */
.section {
    padding: 100px 40px;
}

.section.bg-light {
    background: #fafafa;
}

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

.section-title {
    font-size: 48px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 60px;
    letter-spacing: -1px;
}

/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    align-items: start;
}

.about-image img {
    width: 100%;
    border-radius: 12px;
    filter: grayscale(100%);
}

.about-text h3 {
    font-size: 28px;
    margin-bottom: 20px;
    font-weight: 600;
}

.about-text p {
    font-size: 16px;
    line-height: 1.8;
    color: #666;
    margin-bottom: 20px;
}

.about-text ul {
    list-style: none;
    padding-left: 0;
}

.about-text li {
    font-size: 16px;
    color: #666;
    margin-bottom: 12px;
    padding-left: 20px;
    position: relative;
}

.about-text li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: #000;
    font-weight: bold;
}

/* Works Section */
.works-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
}

.work-card {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
    cursor: pointer;
    border: 1px solid #e0e0e0;
}

.work-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.work-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
    filter: grayscale(100%);
    transition: filter 0.5s;
}

.work-card:hover .work-image {
    filter: grayscale(0%);
}

.work-content {
    padding: 30px;
}

.work-client {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: #999;
    margin-bottom: 8px;
}

.work-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 12px;
    color: #000;
}

.work-role {
    font-size: 14px;
    color: #666;
    margin-bottom: 15px;
}

.work-tags {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.work-tag {
    font-size: 12px;
    padding: 6px 12px;
    background: #f5f5f5;
    border-radius: 12px;
    color: #666;
}

/* Experience Timeline */
.timeline {
    position: relative;
    padding-left: 40px;
}

.timeline:before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: #e0e0e0;
}

.timeline-item {
    position: relative;
    padding-bottom: 40px;
}

.timeline-item:before {
    content: '';
    position: absolute;
    left: -45px;
    top: 0;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #000;
}

.timeline-period {
    font-size: 14px;
    font-weight: 600;
    color: #000;
    margin-bottom: 8px;
    letter-spacing: 1px;
}

.timeline-company {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 6px;
}

.timeline-position {
    font-size: 16px;
    color: #666;
    margin-bottom: 12px;
}

.timeline-description {
    font-size: 14px;
    color: #666;
    line-height: 1.8;
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.skill-item h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 15px;
}

.skill-bar {
    height: 8px;
    background: #e0e0e0;
    border-radius: 10px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: #000;
    transition: width 1s ease;
}

/* Speaking Section */
.speaking-grid {
    display: grid;
    gap: 30px;
}

.speaking-item {
    padding: 30px;
    background: #fff;
    border-radius: 12px;
    border: 1px solid #e0e0e0;
    transition: transform 0.3s;
}

.speaking-item:hover {
    transform: translateX(10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.speaking-date {
    font-size: 14px;
    font-weight: 600;
    color: #000;
    margin-bottom: 8px;
}

.speaking-event {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
}

.speaking-role {
    font-size: 14px;
    color: #666;
    margin-bottom: 12px;
}

.speaking-topic {
    font-size: 14px;
    color: #666;
    line-height: 1.8;
}

/* Contact Section */
.contact-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.contact-description {
    font-size: 18px;
    color: #666;
    margin-bottom: 40px;
    line-height: 1.8;
}

.contact-form {
    text-align: left;
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 16px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 16px;
    font-family: inherit;
    transition: border-color 0.3s;
    background: #fafafa;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #000;
    background: #fff;
}

.btn-primary {
    width: 100%;
    padding: 16px;
    background: #000;
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary:hover {
    background: #333;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

/* Footer */
.footer {
    background: #000;
    color: #fff;
    padding: 60px 40px 40px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.footer-social {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 30px;
}

.social-link {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: #fff;
    color: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: transform 0.3s;
}

.social-link:hover {
    transform: translateY(-5px);
}

.social-link svg {
    width: 24px;
    height: 24px;
}

.footer-text {
    font-size: 14px;
    color: #999;
}

/* Animation */
[data-aos] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s, transform 0.6s;
}

[data-aos].aos-animate {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: #fff;
        width: 100%;
        padding: 20px;
        transition: left 0.3s;
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        gap: 20px;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 48px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .section-title {
        font-size: 36px;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .works-grid {
        grid-template-columns: 1fr;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .profile-image {
        width: 150px;
        height: 150px;
    }
}