/* ==========================================================================
   CSS Variables & Resets
   ========================================================================== */
:root {
    --primary-color: #2C5530; /* Forest Green */
    --primary-light: #4A704D;
    --secondary-color: #8A9A5B; /* Olive */
    --accent-color: #D4A373; /* Warm Wood/Beige */
    --bg-color: #FAF9F6; /* Off white / Natural */
    --bg-light: #F2F0E6; /* Slightly darker natural bg for contrast */
    --text-main: #333333;
    --text-light: #666666;
    --white: #FFFFFF;
    
    --font-en: 'Inter', sans-serif;
    --font-ja: 'Shippori Mincho', serif;
    
    --transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.08);
}

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-ja);
    color: var(--text-main);
    background-color: var(--bg-color);
    line-height: 1.8;
    font-size: 16px;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

/* ==========================================================================
   Typography & Utilities
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 500;
    line-height: 1.4;
    color: var(--primary-color);
}

.text-center { text-align: center; }
.text-white { color: var(--white); }
.mt-5 { margin-top: 3rem; }

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

.section {
    padding: 100px 0;
}

.bg-light {
    background-color: var(--bg-light);
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn-primary, .btn-submit {
    display: inline-block;
    background-color: var(--primary-color);
    color: var(--white);
    padding: 16px 40px;
    border-radius: 4px;
    font-size: 1rem;
    font-family: var(--font-ja);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn-primary::before, .btn-submit::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0%;
    height: 100%;
    background-color: var(--secondary-color);
    transition: var(--transition);
    z-index: -1;
}

.btn-primary:hover::before, .btn-submit:hover::before {
    width: 100%;
}

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

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition);
    background-color: transparent;
}

.header.scrolled {
    background-color: rgba(250, 249, 246, 0.95);
    backdrop-filter: blur(10px);
    padding: 15px 0;
    box-shadow: var(--shadow-sm);
}

.subpage .header {
    background-color: rgba(250, 249, 246, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
}

.header-inner {
    width: 90%;
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo a {
    font-family: var(--font-en);
    font-size: 1.8rem;
    font-weight: 400;
    color: var(--primary-color);
    letter-spacing: 1px;
}

.logo span {
    font-family: var(--font-ja);
    font-size: 1rem;
    margin-left: 8px;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-link {
    font-family: var(--font-en);
    font-size: 0.9rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    position: relative;
    color: var(--primary-color);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0%;
    height: 1px;
    background-color: var(--accent-color);
    transition: var(--transition);
}

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

.btn-contact {
    font-family: var(--font-ja);
    border: 1px solid var(--primary-color);
    padding: 10px 24px;
    border-radius: 30px;
    transition: var(--transition);
}

.btn-contact::after {
    display: none;
}

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

/* Hamburger (Mobile) */
.hamburger {
    display: none;
    cursor: pointer;
    width: 30px;
    height: 20px;
    position: relative;
    z-index: 1001;
}

.hamburger span {
    display: block;
    position: absolute;
    height: 2px;
    width: 100%;
    background: var(--primary-color);
    transition: var(--transition);
}

.hamburger span:nth-child(1) { top: 0; }
.hamburger span:nth-child(2) { top: 9px; }
.hamburger span:nth-child(3) { top: 18px; }

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    height: 100vh;
    min-height: 600px;
    position: relative;
    display: flex;
    align-items: center;
    padding-left: 10%;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    animation: scaleImg 20s linear infinite alternate;
}

@keyframes scaleImg {
    0% { transform: scale(1); }
    100% { transform: scale(1.1); }
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to right, rgba(250, 249, 246, 0.9) 0%, rgba(250, 249, 246, 0.4) 50%, transparent 100%);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 600px;
}

.hero-intro {
    opacity: 1;
    transform: none;
}

.hero-title {
    font-size: 3.5rem;
    line-height: 1.3;
    margin-bottom: 24px;
    font-weight: 400;
}

.hero-title-motion .char {
    display: inline-block;
    opacity: 0;
    filter: blur(10px);
    transform: translateY(0.55em);
    will-change: opacity, filter, transform;
    animation: heroCharIn 0.85s cubic-bezier(0.18, 0.9, 0.28, 1) forwards;
    animation-delay: calc(0.28s + (var(--i) * 0.18s));
}

@keyframes heroCharIn {
    to {
        opacity: 1;
        filter: blur(0);
        transform: translateY(0);
    }
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-main);
    letter-spacing: 0.5px;
}

.hero-intro .hero-subtitle {
    opacity: 0;
    transform: translateY(18px);
    animation: heroSubtitleIn 0.9s ease forwards;
    animation-delay: 3.9s;
}

@keyframes heroSubtitleIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================================================
   Section Headers
   ========================================================================== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-label {
    font-family: var(--font-en);
    font-size: 0.9rem;
    color: var(--accent-color);
    letter-spacing: 2px;
    text-transform: uppercase;
    display: block;
    margin-bottom: 10px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 400;
}

.section-note {
    max-width: 760px;
    margin: 18px auto 0;
    color: var(--text-light);
    font-size: 0.95rem;
}

/* ==========================================================================
   About Section
   ========================================================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-image {
    position: relative;
}

.about-image img {
    border-radius: 8px;
    box-shadow: var(--shadow-md);
    position: relative;
    z-index: 2;
}

.image-accent {
    position: absolute;
    bottom: -20px;
    left: -20px;
    width: 60%;
    height: 60%;
    background-color: var(--secondary-color);
    opacity: 0.2;
    border-radius: 8px;
    z-index: 1;
}

.about-text .section-title {
    margin-bottom: 30px;
    font-size: 2.2rem;
}

.about-text p {
    margin-bottom: 20px;
    color: var(--text-light);
}

.profile-cards {
    margin-top: 40px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.profile-card {
    background-color: var(--white);
    padding: 24px;
    border-radius: 8px;
    border-left: 3px solid var(--accent-color);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.profile-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.profile-card h3 {
    font-size: 0.9rem;
    color: var(--secondary-color);
    margin-bottom: 5px;
}

.profile-card .name {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.profile-card .desc {
    font-size: 0.85rem;
    margin-bottom: 0;
}

/* ==========================================================================
   Services Section
   ========================================================================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-card {
    background-color: var(--white);
    padding: 50px 30px;
    border-radius: 8px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background-color: var(--secondary-color);
    transform: scaleX(0);
    transition: var(--transition);
    transform-origin: left;
}

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

.service-card:hover::before {
    transform: scaleX(1);
}

.service-icon {
    font-family: var(--font-en);
    font-size: 3rem;
    font-weight: 300;
    color: rgba(44, 85, 48, 0.1);
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 1.4rem;
    margin-bottom: 20px;
}

.service-card p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* ==========================================================================
   Projects Section
   ========================================================================== */
.projects-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.project-card {
    cursor: pointer;
}

.project-img-wrapper {
    overflow: hidden;
    border-radius: 8px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-sm);
}

.project-img-button {
    display: block;
    width: 100%;
    padding: 0;
    border: 0;
    background: transparent;
    cursor: zoom-in;
    font: inherit;
}

.project-img-button:focus-visible {
    outline: 3px solid var(--accent-color);
    outline-offset: 4px;
}

.project-img-wrapper img {
    transition: transform 0.6s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.project-card:hover .project-img-wrapper img {
    transform: scale(1.05);
}

.project-info h3 {
    font-size: 1.5rem;
    margin-bottom: 5px;
    transition: var(--transition);
}

.project-card:hover .project-info h3 {
    color: var(--secondary-color);
}

.project-info p {
    font-family: var(--font-en);
    color: var(--text-light);
    font-size: 0.9rem;
    letter-spacing: 1px;
}

.image-lightbox {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 80px 24px 32px;
    background-color: rgba(18, 30, 20, 0.9);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}

.image-lightbox.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.lightbox-img {
    width: auto;
    max-width: min(1100px, 92vw);
    max-height: 82vh;
    border-radius: 8px;
    box-shadow: 0 22px 60px rgba(0, 0, 0, 0.35);
    object-fit: contain;
}

.lightbox-close {
    position: fixed;
    top: 22px;
    right: 22px;
    width: 44px;
    height: 44px;
    display: grid;
    place-items: center;
    border: 1px solid rgba(255, 255, 255, 0.45);
    border-radius: 50%;
    background-color: rgba(250, 249, 246, 0.95);
    color: var(--primary-color);
    cursor: pointer;
    font-size: 2rem;
    line-height: 1;
    transition: var(--transition);
}

.lightbox-close:hover,
.lightbox-close:focus-visible {
    background-color: var(--white);
    transform: translateY(-2px);
}

body.lightbox-open {
    overflow: hidden;
}

.btn-note {
    display: inline-block;
    border: 1px solid rgba(44, 85, 48, 0.25);
    color: var(--primary-color);
    background-color: var(--white);
    padding: 14px 28px;
    border-radius: 4px;
    font-size: 0.95rem;
}

/* ==========================================================================
   Office Section
   ========================================================================== */
.office-card,
.privacy-content {
    background-color: var(--white);
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    padding: 42px;
}

.office-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    border-top: 1px solid rgba(44, 85, 48, 0.16);
}

.office-list div {
    display: grid;
    grid-template-columns: minmax(150px, 0.55fr) 1fr;
    gap: 20px;
    padding: 20px 0;
    border-bottom: 1px solid rgba(44, 85, 48, 0.16);
}

.office-list div:nth-child(odd) {
    padding-right: 28px;
}

.office-list div:nth-child(even) {
    padding-left: 28px;
}

.office-list dt {
    color: var(--primary-color);
    font-weight: 500;
}

.office-list dd {
    color: var(--text-light);
}

.legal-caution {
    margin-top: 28px;
    padding: 18px 20px;
    border-left: 3px solid var(--accent-color);
    background-color: var(--bg-color);
    color: var(--text-light);
    font-size: 0.92rem;
}

/* ==========================================================================
   Contact Section
   ========================================================================== */
.contact {
    background-color: var(--primary-color);
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.contact-inner {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
    position: relative;
    z-index: 1;
}

.contact-info .section-label {
    color: var(--accent-color);
}

.contact-details {
    margin-top: 40px;
    font-size: 1.1rem;
}

.contact-details .tel {
    font-family: var(--font-en);
    font-size: 1.5rem;
    margin: 15px 0;
    color: var(--accent-color);
}

.contact-form-wrapper {
    background-color: var(--white);
    padding: 40px;
    border-radius: 8px;
    color: var(--text-main);
}

.form-lead {
    margin-bottom: 24px;
    color: var(--text-light);
    font-size: 0.95rem;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
    background-color: #fcfcfc;
}

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

.form-group input:disabled,
.form-group textarea:disabled {
    color: #777;
    background-color: #f1f1f1;
    cursor: not-allowed;
}

.checkbox-consent {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    margin-bottom: 24px;
    color: var(--text-light);
    font-size: 0.9rem;
}

.checkbox-consent input {
    margin-top: 7px;
}

.checkbox-consent a {
    color: var(--primary-color);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.btn-submit {
    width: 100%;
    font-size: 1.1rem;
}

.btn-submit:disabled {
    background-color: #b8b8b8;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-submit:disabled::before {
    display: none;
}

/* ==========================================================================
   Access Section
   ========================================================================== */
.access-inner {
    display: grid;
    grid-template-columns: minmax(280px, 0.45fr) 1fr;
    gap: 40px;
    align-items: stretch;
}

.access-info {
    background-color: var(--white);
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    padding: 36px;
}

.access-info h3 {
    margin-bottom: 20px;
    font-size: 1.35rem;
}

.access-info p {
    color: var(--text-light);
    margin-bottom: 18px;
}

.access-info p:last-child {
    margin-bottom: 0;
}

.access-map {
    min-height: 420px;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    background-color: var(--white);
}

.access-map iframe {
    width: 100%;
    height: 100%;
    min-height: 420px;
    border: 0;
    display: block;
}

/* ==========================================================================
   Privacy Section
   ========================================================================== */
.privacy-content {
    max-width: 900px;
    margin: 0 auto;
}

.subpage-section {
    padding-top: 150px;
}

.privacy-content h3 {
    margin-top: 28px;
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.privacy-content h3:first-child {
    margin-top: 0;
}

.privacy-content p {
    color: var(--text-light);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    background-color: #1A331D;
    color: var(--white);
    padding: 60px 0 30px;
}

.footer-logo {
    font-family: var(--font-en);
    font-size: 1.5rem;
    margin-bottom: 20px;
}

.footer-logo span {
    font-family: var(--font-ja);
    font-size: 0.9rem;
    margin-left: 8px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-bottom: 18px;
    color: rgba(255, 255, 255, 0.75);
    font-size: 0.9rem;
}

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

.copyright {
    font-family: var(--font-en);
    font-size: 0.8rem;
    color: #888;
}

/* ==========================================================================
   Animations & Reveal
   ========================================================================== */
.fade-in-up {
    animation: fadeInUp 1s ease forwards;
}

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

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 { transition-delay: 0.2s; }
.delay-2 { transition-delay: 0.4s; }

/* ==========================================================================
   Responsive Design
   ========================================================================== */
@media (max-width: 992px) {
    .about-grid, .contact-inner {
        grid-template-columns: 1fr;
        gap: 50px;
    }
    .office-list {
        grid-template-columns: 1fr;
    }
    .office-list div:nth-child(odd),
    .office-list div:nth-child(even) {
        padding-left: 0;
        padding-right: 0;
    }
    .hero-title {
        font-size: 2.8rem;
    }
}

@media (max-width: 768px) {
    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        height: 100vh;
        background-color: var(--bg-color);
        display: flex;
        align-items: center;
        justify-content: center;
        transition: var(--transition);
        box-shadow: -5px 0 15px rgba(0,0,0,0.1);
    }
    
    .nav.active {
        right: 0;
    }
    
    .nav-list {
        flex-direction: column;
        gap: 30px;
    }
    
    .hamburger {
        display: block;
    }
    
    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg);
        top: 9px;
    }
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg);
        top: 9px;
    }
    
    .hero {
        padding-left: 5%;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }

    .hero-title-motion .char {
        animation-duration: 0.75s;
        animation-delay: calc(0.22s + (var(--i) * 0.14s));
    }

    .hero-intro .hero-subtitle {
        animation-delay: 3.1s;
    }
    
    .services-grid, .projects-grid, .profile-cards {
        grid-template-columns: 1fr;
    }

    .office-card,
    .privacy-content,
    .contact-form-wrapper {
        padding: 28px;
    }

    .access-inner {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .access-info {
        padding: 28px;
    }

    .access-map,
    .access-map iframe {
        min-height: 340px;
    }

    .office-list div {
        grid-template-columns: 1fr;
        gap: 6px;
    }

    .footer-links {
        flex-direction: column;
        gap: 10px;
    }

    .image-lightbox {
        padding: 72px 14px 24px;
    }

    .lightbox-img {
        max-width: 94vw;
        max-height: 78vh;
    }

    .lightbox-close {
        top: 14px;
        right: 14px;
        width: 42px;
        height: 42px;
    }
    
    .hero-overlay {
        background: linear-gradient(to right, rgba(250, 249, 246, 0.95) 0%, rgba(250, 249, 246, 0.7) 100%);
    }
}

@media (prefers-reduced-motion: reduce) {
    .hero-title-motion .char {
        opacity: 1;
        filter: none;
        transform: none;
        animation: none;
    }

    .image-lightbox {
        transition: none;
    }
}