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

:root {
    --color-primary: #000000;
    --color-secondary: #666666;
    --color-light: #f5f5f5;
    --color-white: #ffffff;
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    color: var(--color-primary);
    line-height: 1.6;
    font-size: 16px;
    background-color: var(--color-white);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: transparent;
    border-bottom: 1px solid transparent;
    z-index: 1000;
    padding: 16px 0;
    transition: background-color 0.3s ease, border-bottom 0.3s ease;
}

.nav.scrolled {
    background-color: var(--color-white);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-weight: 600;
    font-size: 18px;
    letter-spacing: -0.5px;
    color: var(--color-white);
    transition: color 0.3s ease;
    text-decoration: none;
    cursor: pointer;
}

.nav.scrolled .nav-logo {
    color: var(--color-primary);
}

.nav-menu {
    display: flex;
    gap: 32px;
}

.nav-link {
    text-decoration: none;
    color: var(--color-white);
    font-size: 14px;
    font-weight: 400;
    transition: var(--transition);
    position: relative;
}

.nav.scrolled .nav-link {
    color: var(--color-primary);
}

.nav-link:hover {
    opacity: 0.7;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-white);
    transition: width 0.3s ease;
}

.nav.scrolled .nav-link::after {
    background-color: var(--color-primary);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-link.active {
    font-weight: 500;
}

.nav-link.active::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--color-white);
    transition: var(--transition);
}

.nav.scrolled .nav-toggle span {
    background-color: var(--color-primary);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 120px 24px 80px;
    padding-top: 120px;
    background-image: url('img/dojo.png');
    background-size: cover;
    background-position: center top;
    background-repeat: no-repeat;
    background-color: var(--color-white);
    position: relative;
    margin-top: 0;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.4);
    z-index: 0;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 200px;
    background: linear-gradient(to bottom, transparent, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0.6), rgba(255, 255, 255, 0.9), var(--color-white));
    z-index: 0;
    pointer-events: none;
}

.hero-content {
    max-width: 800px;
    position: relative;
    z-index: 1;
    min-height: 200px;
    width: 100%;
}

.hero-language {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 1s ease-in-out, visibility 1s ease-in-out;
    text-align: center;
}

.hero-language.active {
    opacity: 1;
    visibility: visible;
    position: absolute;
    pointer-events: auto;
}

.hero-title-en {
    font-size: clamp(30px, 6.5vw, 42px);
    font-weight: 400;
    font-style: italic;
    line-height: 1.1;
    letter-spacing: 0px;
    margin-bottom: 24px;
    color: var(--color-white);
    font-family: 'Merriweather', serif;
    display: block;
    white-space: normal;
    word-wrap: normal;
    /*text-transform: uppercase;*/
}
.hero-title-jp {
    font-size: clamp(30px, 7vw, 52px);
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: 0px;
    margin-bottom: 24px;
    color: var(--color-white);
    font-family: 'Yuji Boku', serif;
    display: block;
    white-space: normal;
    word-wrap: normal;
}
.hero-title-cn {
    font-size: clamp(35px, 8vw, 60px);
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: 0px;
    margin-bottom: 24px;
    color: var(--color-white);
    font-family: 'Zhi Mang Xing', serif;
    display: block;
    white-space: normal;
    word-wrap: normal;
}
.hero-subtitle {
    font-size: clamp(20px, 3vw, 32px);
    font-weight: 400;
    color: rgba(255, 255, 255, 0.9);
    letter-spacing: -0.5px;
}

/* Sections */
.section {
    padding: 75px 0;
}

.section-title {
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 300;
    letter-spacing: -1px;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--color-secondary);
    margin-bottom: 64px;
}

/* About Section
.about {
    background-color: var(--color-light);
}
 */

.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-text {
    font-size: 18px;
    line-height: 1.8;
    margin-bottom: 24px;
    color: var(--color-primary);
}

.about-text strong {
    font-weight: 600;
}

/* Portfolio Section */
.portfolio {
    background-color: var(--color-light);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
    margin-bottom: 80px;
}

.portfolio-item {
    padding: 32px;
    border: 1px solid rgba(0, 0, 0, 0.1);
    transition: var(--transition);
    cursor: pointer;
    display: block;
    text-decoration: none;
    color: inherit;
}

.portfolio-item:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
}

.portfolio-name {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--color-primary);
}

.portfolio-logo {
    width: 32px;
    height: 32px;
    object-fit: contain;
    flex-shrink: 0;
}

.portfolio-tagline {
    font-size: 14px;
    color: var(--color-secondary);
    line-height: 1.6;
}

.prior-investments {
    margin-top: 48px;
    padding-top: 48px;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
}

.prior-title {
    font-size: 26px;
    font-weight: 400;
    margin-bottom: 24px;
    letter-spacing: -0.5px;
    color: var(--color-secondary);
}

.prior-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.prior-item {
    padding: 16px;
    border-left: 1px solid rgba(0, 0, 0, 0.15);
}

.prior-name {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.prior-logo {
    width: 24px;
    height: 24px;
    object-fit: contain;
    flex-shrink: 0;
}

.prior-name a {
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition);
}

.prior-name a:hover {
    opacity: 0.7;
    text-decoration: underline;
}

.prior-meta {
    display: flex;
    flex-direction: column;
    gap: 2px;
    margin-bottom: 8px;
    font-size: 12px;
    color: var(--color-secondary);
}

.prior-desc {
    font-size: 13px;
    color: var(--color-secondary);
    line-height: 1.5;
}

/* Testimonials */
.testimonials {
    background-color: var(--color-light);
}

.testimonial {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.testimonial-quote {
    font-size: 24px;
    line-height: 1.6;
    font-weight: 300;
    font-style: normal;
    margin-bottom: 32px;
    color: var(--color-primary);
}

.testimonial-author {
    font-size: 16px;
    color: var(--color-secondary);
    font-style: normal;
}

/* Team Section */
.team {
    background-color: var(--color-white);
}

.team-member {
    max-width: 800px;
    margin: 0 auto;
}

.team-content {
    display: flex;
    gap: 48px;
    align-items: flex-start;
}

.team-photo {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    object-position: 20% 10%;
    flex-shrink: 0;
}

.team-info {
    flex: 1;
}

.team-name {
    font-size: 48px;
    font-weight: 300;
    letter-spacing: -1px;
    margin-bottom: 8px;
}

.team-title {
    font-size: 20px;
    color: var(--color-secondary);
    margin-bottom: 24px;
}

.team-bio {
    font-size: 18px;
    line-height: 1.8;
    margin-bottom: 32px;
    color: var(--color-primary);
}

.team-social {
    display: flex;
    gap: 16px;
}

.social-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background-color: var(--color-primary);
    color: var(--color-white);
    text-decoration: none;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 500;
    transition: var(--transition);
    border: 1px solid var(--color-primary);
}

.social-button:hover {
    background-color: transparent;
    color: var(--color-primary);
}

.linkedin-button {
    background-color: #0A66C2;
    border-color: #0A66C2;
}

.linkedin-button:hover {
    background-color: transparent;
    color: #0A66C2;
    border-color: #0A66C2;
}

.social-button svg {
    flex-shrink: 0;
}

/* manifesto Section */
.manifesto {
    background-color: var(--color-light);
}

.manifesto-grid {
    display: grid;
    gap: 64px;
    max-width: 900px;
    margin: 0 auto;
}

.manifesto-item {
    display: grid;
    grid-template-columns: 60px 1fr;
    gap: 32px;
    align-items: start;
}

.manifesto-number {
    font-size: 48px;
    font-weight: 300;
    letter-spacing: -1px;
    color: var(--color-secondary);
    font-family: 'Noto Sans', sans-serif;
}

.manifesto-content {
    flex: 1;
}

.manifesto-title {
    font-size: 28px;
    font-weight: 400;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
    line-height: 1.3;
}

.manifesto-story {
    font-size: 16px;
    color: var(--color-secondary);
    margin-bottom: 16px;
    line-height: 1.6;
}

.manifesto-read-more {
    background: none;
    border: none;
    color: var(--color-primary);
    font-size: 14px;
    cursor: pointer;
    text-decoration: underline;
    padding: 0;
    font-family: inherit;
    transition: var(--transition);
}

.manifesto-read-more:hover {
    opacity: 0.7;
}

.manifesto-detail {
    display: none;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    font-size: 16px;
    line-height: 1.8;
    color: var(--color-primary);
}

.manifesto-detail.active {
    display: block;
}

/* Essays Section */
.essays-list {
    display: flex;
    flex-direction: column;
    gap: 32px;
    max-width: 700px;
    margin: 0 auto;
}

.essay-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    text-decoration: none;
    color: var(--color-primary);
    transition: var(--transition);
}

.essay-item:hover {
    padding-left: 16px;
}

.essay-title {
    font-size: 20px;
    font-weight: 400;
}

.essay-date {
    font-size: 14px;
    color: var(--color-secondary);
}

/* Projects Section */
.projects {
    background-color: var(--color-light);
}

.projects-list {
    max-width: 700px;
    margin: 0 auto;
}

.project-item {
    padding: 32px;
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.project-name {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 8px;
}

.project-desc {
    font-size: 16px;
    color: var(--color-secondary);
    margin-bottom: 12px;
}

.project-status {
    font-size: 14px;
    color: var(--color-secondary);
    font-style: italic;
}

/* Contact Section */
.contact {
    text-align: center;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 48px;
    margin-top: 48px;
}

.contact-link {
    text-decoration: none;
    color: var(--color-primary);
    font-size: 18px;
    font-weight: 400;
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.contact-link:hover {
    border-bottom-color: var(--color-primary);
}

/* Footer */
.footer {
    padding: 64px 0;
    text-align: center;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    background-color: var(--color-white);
}

.footer-text-container {
    position: relative;
    min-height: 30px;
    margin-bottom: 16px;
}

.footer-text-item {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    font-size: 18px;
    color: var(--color-secondary);
    opacity: 0;
    visibility: hidden;
    transition: opacity 1s ease-in-out, visibility 1s ease-in-out;
    margin: 0;
}

.footer-text-item.active {
    opacity: 1;
    visibility: visible;
    position: relative;
}

.footer-copyright {
    font-size: 14px;
    color: var(--color-secondary);
    opacity: 0.7;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background-color: var(--color-white);
        flex-direction: column;
        padding: 24px;
        gap: 24px;
        border-bottom: 1px solid rgba(0, 0, 0, 0.1);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }

    .nav-menu .nav-link,
    .nav-menu.active .nav-link {
        color: var(--color-primary) !important;
    }

    .nav-menu .nav-link::after {
        background-color: var(--color-primary) !important;
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }

    .section {
        padding: 80px 0;
    }

    .hero {
        padding: 100px 24px 60px;
    }

    .manifesto-item {
        grid-template-columns: 40px 1fr;
        gap: 24px;
    }

    .manifesto-number {
        font-size: 36px;
    }

    .contact-links {
        flex-direction: column;
        gap: 24px;
    }

    .essay-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    .prior-grid {
        grid-template-columns: 1fr;
    }

    .team-content {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .team-photo {
        margin: 0 auto;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .nav-container {
        padding: 0 16px;
    }

    .portfolio-grid {
        grid-template-columns: 1fr;
    }
}