/* Variables */
:root {
    --color-primary: #1d4ed8;
    --color-primary-dark: #1e40af;
    --color-secondary: #f3f4f6;
    --color-text: #374151;
    --color-text-light: #6b7280;
    --color-background: #ffffff;
    --color-border: #e5e7eb;
    --color-white: #ffffff;
    --color-black: #000000;
    
    --font-sans: 'Montserrat', sans-serif;
    --font-serif: 'Noto Serif JP', serif;
    
    --container-width: 1280px;
    --header-height: 80px;
    
    --transition-base: 0.3s ease;
    --transition-slow: 0.6s ease;
}

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

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    line-height: 1.6;
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-base);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Layout */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

section {
    padding: 100px 0;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    line-height: 1.3;
}

.section__subtitle {
    font-family: var(--font-sans);
    font-size: 14px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: 16px;
    display: block;
}

.section__title {
    font-size: 32px;
    font-weight: 600;
    margin-bottom: 24px;
}

.section__desc {
    color: var(--color-text-light);
    margin-bottom: 24px;
    max-width: 800px;
}

.text-center {
    text-align: center;
}

.text-accent {
    color: var(--color-primary);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 14px 32px;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    transition: all var(--transition-base);
    cursor: pointer;
    border: 1px solid transparent;
}

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

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

.btn--outline {
    background-color: transparent;
    border-color: var(--color-white);
    color: var(--color-white);
}

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

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

.btn--white:hover {
    background-color: rgba(255, 255, 255, 0.9);
}

.btn--full {
    width: 100%;
    text-align: center;
}

.link-arrow {
    display: inline-flex;
    align-items: center;
    font-weight: 600;
    color: var(--color-primary);
    font-size: 14px;
    letter-spacing: 0.05em;
}

.link-arrow::after {
    content: '→';
    margin-left: 8px;
    transition: transform var(--transition-base);
}

.link-arrow:hover::after {
    transform: translateX(4px);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: transform var(--transition-base);
}

.header__container {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    flex-direction: column;
    line-height: 1;
}

.logo__text {
    font-family: var(--font-serif);
    font-size: 24px;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.logo__sub {
    font-size: 10px;
    letter-spacing: 0.1em;
    color: var(--color-text-light);
    margin-top: 4px;
}

.nav__list {
    display: flex;
    gap: 32px;
}

.nav__link {
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.05em;
    position: relative;
    padding: 8px 0;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width var(--transition-base);
}

.nav__link:hover::after,
.nav__link.active::after {
    width: 100%;
}

/* Mobile Menu */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    width: 30px;
    height: 20px;
    position: relative;
    z-index: 1001;
}

.mobile-menu-btn span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-text);
    position: absolute;
    transition: all var(--transition-base);
}

.mobile-menu-btn span:nth-child(1) { top: 0; }
.mobile-menu-btn span:nth-child(2) { top: 9px; }
.mobile-menu-btn span:nth-child(3) { bottom: 0; }

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg);
    top: 9px;
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg);
    bottom: 9px;
}

.mobile-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background-color: var(--color-white);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: right var(--transition-slow);
}

.mobile-nav.active {
    right: 0;
}

.mobile-nav__list {
    text-align: center;
}

.mobile-nav__item {
    margin: 24px 0;
}

.mobile-nav__link {
    font-size: 24px;
    font-family: var(--font-serif);
    font-weight: 600;
}

/* Hero Section */
.hero {
    height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    color: var(--color-white);
    padding: 0;
    overflow: hidden;
}

.hero__bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    z-index: -2;
    animation: zoom 20s infinite alternate;
}

@keyframes zoom {
    from { transform: scale(1); }
    to { transform: scale(1.1); }
}

.hero__overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    z-index: -1;
}

.hero__content {
    position: relative;
    z-index: 1;
    padding-top: var(--header-height);
}

.hero__subtitle {
    font-size: 14px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: 24px;
    opacity: 0.9;
}

.hero__title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 32px;
    line-height: 1.4;
}

.hero__desc {
    font-size: 18px;
    line-height: 1.8;
    margin-bottom: 48px;
    opacity: 0.9;
    max-width: 600px;
}

.hero__actions {
    display: flex;
    gap: 16px;
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    opacity: 0.8;
}

.scroll-indicator__text {
    font-size: 10px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    writing-mode: vertical-rl;
}

.scroll-indicator__line {
    width: 1px;
    height: 60px;
    background-color: var(--color-white);
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0% { transform: scaleY(0); transform-origin: top; }
    50% { transform: scaleY(1); transform-origin: top; }
    51% { transform: scaleY(1); transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; }
}

/* Philosophy Section */
.philosophy__container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.philosophy__image {
    position: relative;
}

.philosophy__image img {
    width: 100%;
    height: auto;
    border-radius: 4px;
}

.philosophy__quote {
    position: absolute;
    bottom: -40px;
    right: -40px;
    background-color: var(--color-white);
    padding: 40px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.05);
}

.philosophy__quote p {
    font-family: var(--font-serif);
    font-size: 18px;
    line-height: 2;
    font-weight: 500;
}

/* Services Section */
.bg-gray {
    background-color: var(--color-secondary);
}

.services__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-top: 64px;
}

.service-card {
    background-color: var(--color-white);
    padding: 40px;
    border-radius: 4px;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.05);
}

.service-card__icon {
    color: var(--color-primary);
    margin-bottom: 24px;
}

.service-card__title {
    font-size: 20px;
    margin-bottom: 16px;
}

.service-card__desc {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.8;
}

/* Works Section */
.works__header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 64px;
}

.works__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.work-card {
    display: block;
    group: hover;
}

.work-card--offset {
    margin-top: 80px;
}

.work-card__image {
    overflow: hidden;
    margin-bottom: 24px;
    aspect-ratio: 4/3;
}

.work-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s ease;
}

.work-card:hover .work-card__image img {
    transform: scale(1.05);
}

.work-card__title {
    font-size: 20px;
    margin-bottom: 8px;
    transition: color var(--transition-base);
}

.work-card:hover .work-card__title {
    color: var(--color-primary);
}

.work-card__info {
    font-size: 14px;
    color: var(--color-text-light);
}

/* CTA Section */
.cta {
    position: relative;
    color: var(--color-white);
    text-align: center;
    padding: 120px 0;
}

.cta__bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    z-index: -2;
}

.cta__overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    z-index: -1;
}

.cta__content {
    position: relative;
    z-index: 1;
}

.cta__title {
    font-size: 36px;
    margin-bottom: 24px;
}

.cta__desc {
    font-size: 16px;
    margin-bottom: 40px;
    opacity: 0.9;
}

/* Footer */
.footer {
    background-color: #111827;
    color: var(--color-white);
    padding: 80px 0 32px;
}

.footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 64px;
    margin-bottom: 64px;
}

.footer__logo {
    font-family: var(--font-serif);
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 24px;
}

.footer__desc {
    font-size: 14px;
    color: #9ca3af;
    line-height: 1.8;
    margin-bottom: 24px;
    max-width: 400px;
}

.footer__address {
    font-size: 14px;
    color: #9ca3af;
    line-height: 1.8;
}

.footer__heading {
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.1em;
    margin-bottom: 24px;
    color: var(--color-white);
}

.footer__links ul li {
    margin-bottom: 16px;
}

.footer__links a {
    font-size: 14px;
    color: #9ca3af;
}

.footer__links a:hover {
    color: var(--color-white);
}

.footer__office ul li {
    margin-bottom: 24px;
    font-size: 14px;
    color: #9ca3af;
}

.footer__office strong {
    display: block;
    color: var(--color-white);
    margin-bottom: 8px;
}

.footer__bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: #6b7280;
}

.footer__bottom-links a {
    color: #6b7280;
}

.footer__bottom-links a:hover {
    color: var(--color-white);
}

/* Page Header */
.page-header {
    background-color: var(--color-secondary);
    padding: 160px 0 80px;
    text-align: center;
}

.page-header__title {
    font-size: 40px;
    margin-bottom: 24px;
}

.page-header__desc {
    color: var(--color-text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* Works Page */
.works-list {
    padding-top: 80px;
}

.works-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-bottom: 64px;
}

.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    padding: 32px 0;
    border-top: 1px solid var(--color-border);
}

.pagination__btn,
.pagination__number {
    padding: 8px 12px;
    border: 1px solid var(--color-border);
    background-color: var(--color-white);
    color: var(--color-text);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all var(--transition-base);
    border-radius: 4px;
}

.pagination__btn:hover,
.pagination__number:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

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

.pagination__numbers {
    display: flex;
    gap: 8px;
}

/* Company Page */
.info-grid__header {
    margin-bottom: 32px;
    border-left: 4px solid var(--color-primary);
    padding-left: 16px;
}

.info-grid__title {
    font-size: 24px;
    font-weight: 600;
}

.info-table {
    width: 100%;
    border-collapse: collapse;
    border: 1px solid var(--color-border);
}

.info-table th,
.info-table td {
    padding: 24px;
    border-bottom: 1px solid var(--color-border);
    text-align: left;
}

.info-table th {
    background-color: var(--color-secondary);
    width: 30%;
    font-weight: 600;
    vertical-align: top;
}

.business-list {
    padding-left: 20px;
}

.business-list li {
    margin-bottom: 8px;
}

.staff-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.staff-group strong {
    display: block;
    color: var(--color-primary);
    margin-bottom: 12px;
}

.staff-group ul li {
    margin-bottom: 8px;
}

.mt-24 {
    margin-top: 96px;
}

/* Contact Page */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
}

.contact-info__item {
    display: flex;
    gap: 16px;
    margin-bottom: 32px;
}

.contact-info__icon {
    color: var(--color-primary);
    background-color: rgba(29, 78, 216, 0.05);
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    flex-shrink: 0;
}

.contact-info__text h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    font-family: var(--font-sans);
}

.contact-info__text p {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.8;
}

.privacy-box {
    background-color: var(--color-secondary);
    padding: 32px;
    margin-top: 48px;
    border: 1px solid var(--color-border);
}

.privacy-box h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    font-family: var(--font-serif);
}

.privacy-box p {
    font-size: 13px;
    color: var(--color-text-light);
    margin-bottom: 16px;
}

.privacy-box a {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-primary);
    text-decoration: underline;
}

.contact-form__title {
    font-size: 24px;
    margin-bottom: 32px;
}

.form-group {
    margin-bottom: 24px;
}

.form-group-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
}

.required {
    color: #ef4444;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--color-border);
    background-color: rgba(243, 244, 246, 0.5);
    font-family: inherit;
    font-size: 16px;
    transition: border-color var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    background-color: var(--color-white);
}

.form-group textarea {
    min-height: 200px;
    resize: vertical;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.modal.active {
    display: block;
    opacity: 1;
}

.modal__overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
}

.modal__content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90%;
    max-width: 1000px;
    background-color: var(--color-white);
    display: flex;
    max-height: 90vh;
    overflow: hidden;
}

.modal__close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: none;
    border: none;
    font-size: 32px;
    cursor: pointer;
    z-index: 10;
    color: var(--color-text);
    line-height: 1;
}

.modal__image {
    width: 60%;
    background-color: #f3f4f6;
}

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

.modal__body {
    display: flex;
    width: 100%;
}

.modal__info {
    width: 40%;
    padding: 48px;
    overflow-y: auto;
}

.modal__category {
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--color-primary);
    text-transform: uppercase;
    display: block;
    margin-bottom: 16px;
}

.modal__title {
    font-size: 24px;
    margin-bottom: 32px;
    line-height: 1.4;
}

.modal__details {
    margin-bottom: 32px;
}

.modal__detail-item {
    margin-bottom: 16px;
}

.modal__label {
    display: block;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.1em;
    margin-bottom: 4px;
}

.modal__value {
    font-size: 14px;
    color: var(--color-text-light);
}

.modal__desc {
    font-size: 14px;
    line-height: 1.8;
    color: var(--color-text-light);
    border-top: 1px solid var(--color-border);
    padding-top: 32px;
}

/* Animations */
.fade-in-up {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-in-left {
    opacity: 0;
    transform: translateX(-20px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.fade-in-right {
    opacity: 0;
    transform: translateX(20px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

.delay-100 { transition-delay: 0.1s; }
.delay-200 { transition-delay: 0.2s; }
.delay-300 { transition-delay: 0.3s; }

/* Responsive */
@media (max-width: 1024px) {
    .philosophy__container {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .philosophy__quote {
        right: 0;
        bottom: -20px;
        padding: 24px;
    }
    
    .services__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .works-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .pagination__numbers {
        flex-wrap: wrap;
    }
    
    .footer__grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .modal__content {
        flex-direction: column;
        overflow-y: auto;
    }
    
    .modal__body {
        flex-direction: column;
    }
    
    .modal__image {
        width: 100%;
        height: 300px;
    }
    
    .modal__info {
        width: 100%;
        padding: 32px;
    }
}

@media (max-width: 768px) {
    .nav {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero__title {
        font-size: 32px;
    }
    
    .services__grid {
        grid-template-columns: 1fr;
    }
    
    .works__grid {
        grid-template-columns: 1fr;
    }
    
    .work-card--offset {
        margin-top: 0;
    }
    
    .desktop-only {
        display: none;
    }
    
    .mobile-only {
        display: block;
    }
    
    .info-table th,
    .info-table td {
        display: block;
        width: 100%;
    }
    
    .info-table th {
        border-bottom: none;
        padding-bottom: 8px;
    }
    
    .staff-list {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .form-group-row {
        grid-template-columns: 1fr;
        gap: 0;
    }
    
    .works-grid {
        grid-template-columns: 1fr;
    }
}