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

html {
    font-size: 62.5%;
}

@media screen and (max-width: 1366px) {
    html {
        font-size: 0.732vw;
    }
}

@media screen and (max-width: 1024px) {
    html {
        font-size: 0.976vw;
    }
}

@media screen and (max-width: 767px) {
    html {
        font-size: 2.544vw;
    }
}

body {
    font-family: 'Roboto', sans-serif;
    font-weight: 400;
    line-height: 1.6;
    color: #333333;
    background-color: #ffffff;
    overflow-x: hidden;
}

.container {
    max-width: 116rem;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 2rem 0;
}

.header-container {
    margin: 0 auto;
    padding: 0 4rem;
    display: flex;
    justify-content: flex-end;
    align-items: center;
}

.nav {
    position: relative;
}

.nav-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s ease;
}

.nav-toggle:active {
    transform: scale(0.95);
}

.menu-dots {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    width: 2.6rem;
    height: 2.6rem;
    transform: rotate(90deg);
}

.dot {
    font-size: 1.8rem;
    color: #535B5F;
    font-weight: bold;
    line-height: 1;
    position: absolute;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.dot-1 {
    left: 0;
}

.dot-2 {
    left: 50%;
    transform: translateX(-50%);
}

.dot-3 {
    right: 0;
}

.nav-toggle:hover .dot {
    color: #666666;
}

/* アクティブ時のアニメーション - 3点が中央に集まる */
.nav-toggle.active .dot-1 {
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
}

.nav-toggle.active .dot-3 {
    right: 50%;
    transform: translateX(50%);
    opacity: 0;
}

.nav-toggle.active .dot-2 {
    opacity: 1;
    transform: translateX(-50%) scale(1.2);
}

.nav-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background-color: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(0.4rem);
    border-radius: 0.8rem;
    padding: 0 2rem;
    flex-direction: column;
    gap: 2rem;
    min-width: 20rem;
    z-index: 1001;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-1rem);
    transition: all 0.3s ease;
}

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

.nav-link {
    display: block;
    text-align: right;
    text-decoration: none;
    color: #535b5f;
    font-size: 1.4rem;
    padding: 0.8rem 0;
    letter-spacing: 0.224rem;
    font-weight: 400;
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateX(1rem);
}

.nav-menu.active .nav-link {
    opacity: 1;
    transform: translateX(0);
}

.nav-menu.active .nav-link:nth-child(1) {
    transition-delay: 0.1s;
}

.nav-menu.active .nav-link:nth-child(2) {
    transition-delay: 0.2s;
}

.nav-menu.active .nav-link:nth-child(3) {
    transition-delay: 0.3s;
}

.nav-menu.active .nav-link:nth-child(4) {
    transition-delay: 0.4s;
}

.nav-menu.active .nav-link:nth-child(5) {
    transition-delay: 0.5s;
}

.nav-link:hover {
    color: #333333;
    transform: translateX(-0.5rem);
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background-color: #ffffff;
}

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

/* Hero Logo SVG Animation */
.hero-logo .logo-svg {
    width: 65.9rem;
    height: 18.2rem;
    max-width: 90vw;
    height: auto;
    overflow: visible;
}

.logo-path {
    fill: transparent;
    stroke: #333333;
    stroke-width: 0.5;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-dasharray: 0;
    stroke-dashoffset: 0;
}


/* Individual adjustments for specific paths */
/* i character dot (2nd path) - slower animation for short path */
.logo-path.-text-w {
    animation: drawStroke5 1s ease-in-out forwards, fillColor 0.4s ease-in-out 1s forwards;
}

.logo-path.-text-i01 {
    animation: drawStroke1 1s ease-in-out forwards, fillColor 0.4s ease-in-out 1s forwards;
}

.logo-path.-text-i02 {
    animation: drawStroke2 1s ease-in-out forwards, fillColor 0.4s ease-in-out 1s forwards;
}

.logo-path.-text-s {
    animation: drawStroke3 1s ease-in-out forwards, fillColor 0.4s ease-in-out 1s forwards;
}

.logo-path.-text-m {
    animation: drawStroke4 1s ease-in-out forwards, fillColor 0.4s ease-in-out 1s forwards;
}

@keyframes drawStroke1 {
    0% {
        stroke-dashoffset: 250;
    }

    100% {
        stroke-dashoffset: 0;
    }
}

@keyframes drawStroke2 {
    0% {
        stroke-dashoffset: 500;
    }

    100% {
        stroke-dashoffset: 0;
    }
}

@keyframes drawStroke3 {
    0% {
        stroke-dashoffset: 1000;
    }

    100% {
        stroke-dashoffset: 0;
    }
}

@keyframes drawStroke4 {
    0% {
        stroke-dashoffset: 1500;
    }

    100% {
        stroke-dashoffset: 0;
    }
}

@keyframes drawStroke5 {
    0% {
        stroke-dashoffset: 2000;
    }

    100% {
        stroke-dashoffset: 0;
    }
}

@keyframes fillColor {
    0% {
        fill: transparent;
        stroke: #333333;
        stroke-width: 0.5;
    }

    100% {
        fill: #333333;
        stroke: transparent;
        stroke-width: 0;
    }
}

/* Grid Lines Animation */
.grid-line {
    stroke: #333333;
    stroke-width: 0.25;
    stroke-linecap: square;
    opacity: 0;
    stroke-dasharray: 0;
    stroke-dashoffset: 0;
    animation: drawGridLine 1s ease-in-out forwards, fadeOutGridLine 0.5s ease-out 1s forwards;
}

/* All grid lines start simultaneously with logo */
.grid-line {
    animation-delay: 0s, 1.1s;
}

@keyframes drawGridLine {
    0% {
        stroke-dashoffset: 500;
        opacity: 0;
    }

    10% {
        opacity: 0.6;
    }

    100% {
        stroke-dashoffset: 0;
        opacity: 0.6;
    }
}

@keyframes fadeOutGridLine {
    0% {
        opacity: 0.6;
    }

    100% {
        opacity: 0;
    }
}

.scroll-indicator {
    position: absolute;
    left: 5rem;
    bottom: 5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.scroll-text {
    font-size: 1.2rem;
    letter-spacing: 0.168rem;
    color: #333333;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    font-weight: 400;
}

.scroll-line {
    position: relative;
    width: 0.1rem;
    height: 10rem;
    background-color: rgba(51, 51, 51, 0.3);
    overflow: hidden;
}

.scroll-line::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3rem;
    background-color: #333333;
    animation: scrollLineMove 2s ease-in-out infinite;
}

@keyframes scrollLineMove {
    0% {
        transform: translateY(-3rem);
        opacity: 0;
    }

    20% {
        opacity: 1;
    }

    80% {
        opacity: 1;
    }

    100% {
        transform: translateY(10rem);
        opacity: 0;
    }
}

.scroll-line-short {
    display: none;
}

/* About Section */
.about {
    padding: 18rem 0;
    text-align: center;
}

.section-title {
    font-size: 3.2rem;
    letter-spacing: 1.6rem;
    color: #333333;
    margin-bottom: 6rem;
    font-weight: 400;
}

.about-description {
    font-size: 1.4rem;
    letter-spacing: 0.28rem;
    color: #535b5f;
    max-width: 60.1rem;
    margin: 0 auto;
    line-height: 1.8;
}

/* Service Section */
.service {
    padding: 12rem 0;
    background-color: #ffffff;
}

.service-grid {
    position: relative;
    display: flex;
    flex-wrap: wrap;
    margin-top: 8rem;
}

.service-item {
    width: calc(100% / 3);
    text-align: center;
    padding: 6.4rem 4.8rem;
}

.service-item:nth-child(1) {
    border-bottom: solid 0.1rem #d9d9d9;
    border-right: solid 0.1rem #d9d9d9;
}

.service-item:nth-child(2) {
    border-bottom: solid 0.1rem #d9d9d9;
    border-right: solid 0.1rem #d9d9d9;
}

.service-item:nth-child(3) {
    border-bottom: solid 0.1rem #d9d9d9;
}

.service-item:nth-child(4) {
    border-right: solid 0.1rem #d9d9d9;
}

.service-item:nth-child(5) {
    border-right: solid 0.1rem #d9d9d9;
}

.service-item:nth-child(6) {}

.service-image {
    position: relative;
    width: 100%;
    height: auto;
    max-width: 19rem;
    max-height: 19rem;
    margin: 0 auto 3rem;
}

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

.service-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
}

.service-label {
    color: #ffffff;
    font-size: 1.8rem;
    letter-spacing: 0.18rem;
    font-weight: 400;
}

.service-title {
    font-size: 2rem;
    letter-spacing: 0.4rem;
    color: #333333;
    margin-bottom: 2rem;
    font-weight: 600;
}

.service-list {
    list-style: none;
    text-align: left;
    margin: 0 auto;
}

.service-list li {
    font-size: 1.4rem;
    letter-spacing: 0.14rem;
    color: #535b5f;
    margin-bottom: 0.8rem;
    position: relative;
    padding-left: 2rem;
}

.service-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 0.6rem;
    height: 0.6rem;
    background-color: #535b5f;
    border-radius: 50%;
}

/* Company Section */
.company {
    padding: 12rem 0 20rem;
    text-align: center;
}

.company-info {
    max-width: 72rem;
    margin: 0 auto;
    margin-top: 8rem;
}

.company-item {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 2rem;
    border-bottom: 0.1rem solid #e0e0e0;
}

.company-item:first-child {
    border-top: 0.1rem solid #e0e0e0;
}

.company-label {
    font-size: 1.4rem;
    letter-spacing: 0.28rem;
    color: #535b5f;
    min-width: 12rem;
    text-align: left;
}

.company-value {
    font-size: 1.4rem;
    letter-spacing: 0.28rem;
    color: #535b5f;
    text-align: left;
    flex: 1;
    margin-left: 4rem;
}

/* Contact Section */
.contact {}

.contact-inner {
    padding: 10rem 0;
    background-color: #333333;
    color: #ffffff;
    text-align: center;
}

.contact .section-title {
    color: #ffffff;
}

.contact-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10rem;
}

.contact-description {
    order: 2;
    font-size: 1.4rem;
    letter-spacing: 0.28rem;
    color: #ffffff;
    line-height: 2;
    text-align: left;
}

.contact-button {
    order: 1;
    display: flex;
    justify-content: center;
}

.contact-btn {
    position: relative;
    background: none;
    border: none;
    color: #ffffff;
    height: 9.6rem;
    font-size: 1.4rem;
    font-weight: 400;
    letter-spacing: 0.28rem;
    padding-right: 7.7rem;
    cursor: pointer;
    display: flex;
    align-items: center;
}

.contact-btn span {
    position: relative;
    z-index: 1;
}

.contact-btn::before {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    right: 0;
    width: 9.6rem;
    height: 9.6rem;
    background-color: #808080;
    border-radius: 50%;
    transition: all 0.3s ease;
    border: 0.1rem solid #333333;
}

.contact-btn .arrow-icon {
    position: absolute;
    right: 3.7rem;
    top: 50%;
    transform: translateY(-50%);
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s ease;
}

.contact-btn:hover::before {
    background-color: #333333;
    border-color: #ffffff;
}

.contact-btn:hover .arrow-icon {
    transform: translateY(-50%) translateX(0.5rem);
}

/* Footer */
.footer {
    margin-top: 10rem;
    padding: 6rem 0 4rem;
    background-color: #ffffff;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: 4rem;
    padding-left: 11.4rem;
}

.footer-logo img {
    width: auto;
    height: 6rem;
}

.footer-nav {
    width: 60rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 4rem 3rem;
}

.footer-link {
    display: block;
    width: calc(33.333% - 2rem);
    text-decoration: none;
    color: #535b5f;
    font-size: 1.4rem;
    letter-spacing: 0.224rem;
    transition: color 0.3s ease;
}

.footer-link:hover {
    color: #333333;
}

.footer-scroll {
    display: flex;
    justify-content: flex-end;
}

.scroll-top {
    background: none;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.scroll-top:hover {
    transform: translateY(-0.5rem);
}

.scroll-top img {
    width: 3.8rem;
    height: 3.6rem;
}

.footer-copyright {
    padding-top: 4rem;
    padding-inline: 11.4rem;
}

.footer-copyright p {
    font-size: 1.2rem;
    letter-spacing: 0.168rem;
    color: #535b5f;
}

.only-sp {
    display: none;
}

/* Responsive Design */
@media (max-width: 767px) {

    .hide-sp {
        display: none;
    }

    .only-sp {
        display: inline-block;
    }

    .header-container {
        padding: 0 2rem;
    }

    .hero-logo .logo-svg {
        width: 72vw;
        max-width: 40rem;
    }

    .scroll-indicator {
        left: 2rem;
        bottom: 3rem;
    }

    .scroll-line {
        height: 8rem;
    }

    .scroll-text {
        font-size: 1rem;
        letter-spacing: 0.12rem;
    }

    .section-title {
        display: block;
        font-size: 2.4rem;
        letter-spacing: 0.8rem;
        text-align: center;
    }

    .service-grid {
        margin-top: 4rem;
    }

    .service-image {
        width: 15rem;
        height: 15rem;
    }

    .company-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .service-item:nth-child(1) {
        border-top: solid 0.1rem #d9d9d9 !important;
    }

    .company-value {
        margin-left: 0;
    }

    .footer {
        padding-top: 4rem;
        margin-top: 0;
    }

    .footer-content {
        flex-direction: column;
        gap: 6rem;
        text-align: center;
        padding-left: 0;
    }

    .footer-nav {
        width: 100%;
        padding-inline: 2.4rem;
        flex-wrap: wrap;
        gap: 3rem 2rem;
    }

    .footer-link {
        width: calc(50% - 1rem);
        text-align: left;
    }

    .footer-logo img {
        height: 4rem;
    }

    .footer-copyright {
        padding-inline: 2.4rem;
        text-align: center;
    }

    .container {
        padding: 0 2.4rem;
    }

    .service,
    .company,
    .contact {
        padding: 5rem 0;
    }

    .section-title {
        font-size: 2.4rem;
        letter-spacing: 0.4rem;
        margin-bottom: 2.4rem;
    }

    .about {
        padding-bottom: 8rem;
    }

    .about-description,
    .contact-description {
        font-size: 1.4rem;
        letter-spacing: 0.15rem;
    }

    .service-item {
        width: 100%;
        padding: 4.8rem;
        border: none !important;
        border-bottom: solid 0.1rem #d9d9d9 !important;
    }

    .service-list {
        font-size: 1.2rem;
    }

    .company-info {
        margin-top: 4rem;
    }

    .company-label,
    .company-value {
        font-size: 1.2rem;
        letter-spacing: 0.15rem;
    }

    .contact-inner {
        margin-inline: -2.4rem;
        padding: 6.4rem 1.6rem;
    }

    .contact-content {
        flex-direction: column;
        gap: 3.2rem;
    }

    .contact-btn {
        order: 2;
        font-size: 1.4rem;
        height: 7.2rem;
        letter-spacing: 0.15rem;
        padding: 1.5rem 3rem;
        padding-right: 5.6rem;
        gap: 1.5rem;
    }

    .contact-btn::before {
        width: 7.2rem;
        height: 7.2rem;
    }

    .contact-btn .arrow-icon {
        right: 2.4rem;
    }

    .contact-description {
        order: 1;
        text-align: center;
    }

    .contact-btn .arrow-icon svg {
        width: 1.4rem;
        height: 1.4rem;
    }

    .scroll-indicator {
        left: 1.5rem;
        bottom: 2rem;
    }

    .scroll-line {
        height: 6rem;
    }

    .scroll-text {
        font-size: 0.9rem;
        letter-spacing: 0.1rem;
    }
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Animation classes */
.fade-in {
    opacity: 0;
    transform: translateY(3rem);
    transition: all 0.6s ease;
}

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

.slide-in-left {
    opacity: 0;
    transform: translateX(-5rem);
    transition: all 0.6s ease;
}

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

.slide-in-right {
    opacity: 0;
    transform: translateX(5rem);
    transition: all 0.6s ease;
}

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

.slide-up {
    opacity: 0;
    transform: translateY(5rem);
    transition: all 0.8s ease;
}

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

/* Screen Reader Only - SEO対策 */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus styles for accessibility */
*:focus {
    outline: 2px solid #007bff;
    outline-offset: 2px;
}

/* Skip to main content link for accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: #000;
    color: #fff;
    padding: 8px;
    text-decoration: none;
    z-index: 9999;
}

.skip-link:focus {
    top: 6px;
}

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