@charset "UTF-8";

/* ========================================
   CSS Variables
   ======================================== */
:root {
    /* Colors */
    --color-black: #111111;
    --color-white: #ffffff;
    --color-bg-light: #f5f5f5;
    --color-gray: #666666;
    --color-gray-light: #e0e0e0;
    --color-border: #dddddd;
    --color-accent: #1e3a8a; /* 信頼感のあるブルー */

    /* Typography */
    --font-en: "Outfit", sans-serif;
    --font-ja: "Noto Sans JP", sans-serif;

    /* Spacing */
    --section-padding: clamp(80px, 10vw, 160px);
    --container-width: 1360px;
    --container-padding: 40px;

    /* Transitions */
    --transition-fast: 0.3s ease;
    --transition-base: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
    font-size: 62.5%; /* 1rem = 10px */
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-ja);
    font-size: 1.6rem;
    line-height: 1.8;
    color: var(--color-black);
    background-color: var(--color-white);
    letter-spacing: 0.05em;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

ul, ol {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    vertical-align: bottom;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.section {
    padding: var(--section-padding) 0;
}

/* Typography Classes */
.section-title {
    font-family: var(--font-en);
    font-size: clamp(4rem, 8vw, 9rem);
    font-weight: 900;
    line-height: 1.1;
    text-transform: uppercase;
    margin-bottom: 2rem;
    letter-spacing: 0.02em;
}

.section-lead {
    font-size: clamp(1.4rem, 2vw, 1.8rem);
    font-weight: 500;
    color: var(--color-gray);
    margin-bottom: clamp(4rem, 6vw, 8rem);
}

/* ========================================
   Components
   ======================================== */
/* Buttons */
.btn-box {
    margin-top: clamp(4rem, 6vw, 8rem);
    text-align: right;
}
.btn-box--left {
    text-align: left;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-en);
    font-weight: 700;
    letter-spacing: 0.1em;
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn--outline {
    height: 50px;
    padding: 0 40px;
    border: 1px solid var(--color-white);
    color: var(--color-white);
    font-size: 1.4rem;
}
.btn--outline:hover {
    background-color: var(--color-white);
    color: var(--color-black);
}

/* Dark mode override for sticky header */
.header.is-scrolled .btn--outline {
    border-color: var(--color-black);
    color: var(--color-black);
}
.header.is-scrolled .btn--outline:hover {
    background-color: var(--color-black);
    color: var(--color-white);
}

.btn--viewmore {
    position: relative;
    padding-right: 60px;
    font-size: 1.6rem;
}
.btn--viewmore span:not(.btn--viewmore-arrow) {
    position: relative;
}
.btn--viewmore span:not(.btn--viewmore-arrow)::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: currentColor;
    transition: width var(--transition-base);
}
.btn--viewmore:hover span:not(.btn--viewmore-arrow)::after {
    width: 100%;
}

.btn--viewmore-arrow {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 40px;
    background-color: var(--color-black);
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--transition-base);
}
.btn--viewmore-arrow::before {
    content: '→';
    font-family: Arial, sans-serif;
    font-size: 18px;
}
.btn--viewmore:hover .btn--viewmore-arrow {
    transform: translate(10px, -50%);
}

.btn--white {
    height: 60px;
    padding: 0 60px;
    background-color: var(--color-white);
    color: var(--color-black);
    font-size: 1.8rem;
}
.btn--white:hover {
    background-color: var(--color-black);
    color: var(--color-white);
}

/* Scroll Animation Classes */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}
.fade-in.is-visible {
    opacity: 1;
    transform: translateY(0);
}

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

.header.is-scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    color: var(--color-black);
    padding: 15px 0;
    box-shadow: 0 1px 0 rgba(0,0,0,0.05);
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 40px;
    max-width: 1920px;
    margin: 0 auto;
}

.header__logo {
    font-family: var(--font-en);
    font-size: 2.2rem;
    font-weight: 900;
    letter-spacing: 0.1em;
}

.header__logo a {
    text-shadow: 0 2px 8px rgba(0,0,0,0.6);
    transition: color var(--transition-base), text-shadow var(--transition-base);
}

.header.is-scrolled .header__logo a {
    text-shadow: none;
}

.header__nav {
    margin-left: auto;
    margin-right: 40px;
}

.header__list {
    display: flex;
    gap: 40px;
}

.header__list a {
    font-family: var(--font-en);
    font-size: 1.4rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    position: relative;
    padding: 10px 0;
    text-shadow: 0 2px 6px rgba(0,0,0,0.8);
    transition: color var(--transition-base), text-shadow var(--transition-base);
}

.header.is-scrolled .header__list a {
    text-shadow: none;
}
.header__list a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: currentColor;
    transition: width var(--transition-base);
}
.header__list a:hover::after {
    width: 100%;
}

.header__hamburger {
    display: none;
    width: 30px;
    height: 20px;
    position: relative;
    z-index: 101;
    background: transparent;
    border: none;
    cursor: pointer;
}

@media screen and (max-width: 1024px) {
    .header__nav, .header__contact {
        display: none;
    }
    .header__hamburger {
        display: block;
    }
    .header__inner {
        padding: 0 20px;
    }
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    position: relative;
    height: 100vh;
    width: 100%;
    overflow: hidden;
    color: var(--color-white);
}

.hero__videos {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    overflow: hidden;
    background-color: var(--color-black);
}

.hero__video-item {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 2.5s ease-in-out;
}

.hero__video-item.is-active {
    opacity: 1;
}

.hero__overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to right, rgba(0,0,0,0.6) 0%, rgba(0,0,0,0.2) 100%);
    z-index: 2;
}

.hero__content {
    position: relative;
    z-index: 2;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 0 40px;
    max-width: 1920px;
    margin: 0 auto;
}

.hero__title {
    font-size: clamp(3rem, 6vw, 6.4rem);
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: auto;
    margin-top: 25vh;
}
.hero__title-line {
    display: block;
}

.hero__grid-nav {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    border-top: 1px solid rgba(255,255,255,0.3);
    border-left: 1px solid rgba(255,255,255,0.3);
    margin-top: auto;
    margin-bottom: 40px;
    max-width: 900px;
}

.hero__grid-item {
    padding: clamp(20px, 3vw, 40px);
    border-right: 1px solid rgba(255,255,255,0.3);
    border-bottom: 1px solid rgba(255,255,255,0.3);
    transition: background-color var(--transition-base);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: clamp(120px, 10vw, 160px);
}
.hero__grid-item:hover {
    background-color: rgba(255,255,255,0.1);
}

.hero__grid-label {
    font-size: clamp(1.4rem, 1.5vw, 1.6rem);
    font-weight: 500;
}
.hero__grid-en {
    font-family: var(--font-en);
    font-size: clamp(1.8rem, 2vw, 2.4rem);
    font-weight: 700;
    letter-spacing: 0.05em;
    margin-top: auto;
}

@media screen and (max-width: 768px) {
    .hero__content {
        padding: 0 20px;
    }
    .hero__grid-nav {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   Philosophy Section
   ======================================== */
.philosophy {
    background-color: var(--color-bg-light);
}

.philosophy__inner {
    display: flex;
    flex-direction: column;
    max-width: 800px;
    margin: 0 auto;
}

.philosophy .section-title {
    text-align: center;
    color: var(--color-gray-light);
    margin-bottom: clamp(3rem, 5vw, 6rem);
}

.philosophy__lead {
    font-size: clamp(2.4rem, 4vw, 3.6rem);
    font-weight: 700;
    line-height: 1.5;
    margin-bottom: 4rem;
    letter-spacing: 0.02em;
}

.philosophy__text {
    font-size: 1.6rem;
    line-height: 2;
}
.philosophy__text p {
    margin-bottom: 2rem;
}

.philosophy__president {
    margin-top: 6rem;
    font-weight: 500;
}
.philosophy__president span {
    display: block;
    font-size: 2.4rem;
    font-weight: 700;
    margin-top: 0.5rem;
}

/* ========================================
   Business Section
   ======================================== */
.business__list {
    border-top: 1px solid var(--color-border);
}

.business__item {
    border-bottom: 1px solid var(--color-border);
}

.business__link {
    display: flex;
    align-items: center;
    padding: clamp(30px, 5vw, 60px) 0;
    transition: background-color var(--transition-base), padding-left var(--transition-base);
}
.business__link:hover {
    padding-left: 20px;
}

.business__num {
    font-family: var(--font-en);
    font-size: clamp(3rem, 5vw, 4.8rem);
    font-weight: 900;
    color: var(--color-gray-light);
    width: clamp(80px, 10vw, 150px);
}

.business__info {
    flex-grow: 1;
}

.business__name {
    font-size: clamp(2.4rem, 4vw, 3.6rem);
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.business__en {
    font-family: var(--font-en);
    font-size: clamp(1.4rem, 2vw, 1.8rem);
    color: var(--color-gray);
    letter-spacing: 0.05em;
}

.business__arrow {
    width: 24px;
    height: 24px;
    position: relative;
    transition: transform var(--transition-base);
}
.business__arrow::before,
.business__arrow::after {
    content: '';
    position: absolute;
    background-color: var(--color-black);
}
.business__arrow::before {
    top: 50%;
    right: 0;
    width: 24px;
    height: 1px;
}
.business__arrow::after {
    top: 50%;
    right: 0;
    width: 8px;
    height: 1px;
    transform: rotate(45deg);
    transform-origin: right center;
}
.business__link:hover .business__arrow {
    transform: translateX(10px);
}

@media screen and (max-width: 768px) {
    .business__link {
        flex-direction: column;
        align-items: flex-start;
    }
    .business__num {
        margin-bottom: 10px;
    }
    .business__arrow {
        display: none;
    }
    .business__link:hover {
        padding-left: 0;
    }
}

/* ========================================
   Works Section
   ======================================== */
.works__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.works__card {
    display: block;
}

.works__img-wrapper {
    overflow: hidden;
    margin-bottom: 2rem;
    aspect-ratio: 4/5;
}

.works__img-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}
.works__card:hover .works__img-wrapper img {
    transform: scale(1.05);
}

.works__name {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.works__meta {
    font-size: 1.4rem;
    color: var(--color-gray);
}

@media screen and (max-width: 1024px) {
    .works__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media screen and (max-width: 768px) {
    .works__grid {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   Company Section
   ======================================== */
.company {
    background-color: var(--color-bg-light);
}

.company__inner {
    display: flex;
    justify-content: space-between;
    gap: clamp(40px, 8vw, 120px);
}

.company__header {
    width: 30%;
    position: sticky;
    top: 150px;
    height: max-content;
}

.company__data {
    width: 60%;
}

.company__name {
    font-size: 2.8rem;
    font-weight: 700;
    margin-bottom: 4rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid var(--color-black);
}

.company__dl {
    display: flex;
    flex-direction: column;
}

.company__dl-row {
    display: flex;
    padding: 3rem 0;
    border-bottom: 1px solid var(--color-border);
}

.company__dl-row dt {
    width: 30%;
    font-weight: 700;
}

.company__dl-row dd {
    width: 70%;
    line-height: 1.8;
}

@media screen and (max-width: 1024px) {
    .company__inner {
        flex-direction: column;
    }
    .company__header {
        position: static;
        width: 100%;
        margin-bottom: 40px;
    }
    .company__data {
        width: 100%;
    }
    .company__dl-row {
        flex-direction: column;
    }
    .company__dl-row dt {
        width: 100%;
        margin-bottom: 10px;
    }
    .company__dl-row dd {
        width: 100%;
    }
}

/* ========================================
   Recruit Banner
   ======================================== */
.recruit-banner {
    position: relative;
    padding: 150px 0;
    color: var(--color-white);
    text-align: center;
    overflow: hidden;
}

.recruit-banner__bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}
.recruit-banner__bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
}
.header__logo-svg {
    height: 32px;
    width: 32px;
    display: block;
}

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

.recruit-banner__content {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.recruit-banner__title {
    font-family: var(--font-en);
    font-size: clamp(4rem, 8vw, 8rem);
    font-weight: 900;
    margin-bottom: 2rem;
    letter-spacing: 0.05em;
}

.recruit-banner__text {
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    font-weight: 700;
    margin-bottom: 4rem;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background-color: var(--color-black);
    color: var(--color-white);
    padding: clamp(60px, 8vw, 120px) 0 40px;
}

.footer__inner {
    display: flex;
    justify-content: space-between;
    border-bottom: 1px solid rgba(255,255,255,0.2);
    padding-bottom: 60px;
    margin-bottom: 40px;
}

.footer__logo-area {
    width: 40%;
}

.footer__big-logo {
    font-family: var(--font-en);
    font-size: clamp(6rem, 10vw, 14rem);
    font-weight: 900;
    line-height: 0.9;
    letter-spacing: -0.02em;
    margin-bottom: 4rem;
}

.footer__address {
    color: rgba(255,255,255,0.7);
    line-height: 1.8;
}

.footer__nav-area {
    width: 50%;
    display: flex;
    justify-content: space-between;
}

.footer__nav-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px 60px;
}

.footer__nav-list a {
    font-family: var(--font-en);
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: 0.1em;
}
.footer__nav-list a:hover {
    color: rgba(255,255,255,0.7);
}

.footer__legal-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}
.footer__legal-list a {
    font-size: 1.4rem;
    color: rgba(255,255,255,0.6);
}
.footer__legal-list a:hover {
    text-decoration: underline;
}

.footer__copy {
    text-align: right;
    font-family: var(--font-en);
    font-size: 1.2rem;
    color: rgba(255,255,255,0.5);
    letter-spacing: 0.1em;
}

@media screen and (max-width: 1024px) {
    .footer__inner {
        flex-direction: column;
        gap: 60px;
    }
    .footer__logo-area, .footer__nav-area {
        width: 100%;
    }
}
@media screen and (max-width: 768px) {
    .footer__nav-area {
        flex-direction: column;
        gap: 40px;
    }
    .footer__nav-list {
        grid-template-columns: 1fr;
    }
    .footer__copy {
        text-align: left;
    }
}

/* ========================================
   Sub Pages General Styles
   ======================================== */
.page-header {
    padding: clamp(150px, 20vw, 250px) 0 clamp(80px, 10vw, 120px);
    background-color: var(--color-bg-light);
    text-align: center;
    margin-bottom: clamp(60px, 8vw, 120px);
}

.page-header__title {
    font-family: var(--font-en);
    font-size: clamp(5rem, 8vw, 10rem);
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: 0.05em;
    margin-bottom: 2rem;
}

.page-header__subtitle {
    font-size: clamp(1.6rem, 2vw, 2rem);
    color: var(--color-gray);
    font-weight: 500;
    letter-spacing: 0.1em;
}

.page-content {
    margin-bottom: clamp(100px, 12vw, 160px);
}

/* ========================================
   Company Page
   ======================================== */
.company-info {
    max-width: 900px;
    margin: 0 auto;
}

.company-table {
    width: 100%;
    border-top: 2px solid var(--color-black);
}

.company-table tr {
    border-bottom: 1px solid var(--color-border);
}

.company-table th {
    width: 30%;
    padding: 3rem 0;
    text-align: left;
    font-weight: 700;
    vertical-align: top;
}

.company-table td {
    width: 70%;
    padding: 3rem 0;
    line-height: 1.8;
}

@media screen and (max-width: 768px) {
    .company-table, .company-table tbody, .company-table tr, .company-table th, .company-table td {
        display: block;
        width: 100%;
    }
    .company-table th {
        padding-bottom: 1rem;
        border-bottom: none;
    }
    .company-table td {
        padding-top: 0;
    }
}

/* ========================================
   Service Page
   ======================================== */
.service-block {
    margin-bottom: clamp(80px, 10vw, 160px);
    display: flex;
    align-items: center;
    gap: clamp(40px, 8vw, 100px);
}

.service-block:nth-child(even) {
    flex-direction: row-reverse;
}

.service-block__img {
    width: 50%;
}

.service-block__img img {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
}

.service-block__content {
    width: 50%;
}

.service-block__num {
    font-family: var(--font-en);
    font-size: clamp(4rem, 6vw, 8rem);
    font-weight: 900;
    color: var(--color-gray-light);
    line-height: 1;
    margin-bottom: 2rem;
    display: block;
}

.service-block__title {
    font-size: clamp(2.4rem, 3vw, 3.6rem);
    font-weight: 700;
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid var(--color-black);
}

.service-block__text {
    line-height: 2;
}

@media screen and (max-width: 1024px) {
    .service-block, .service-block:nth-child(even) {
        flex-direction: column;
    }
    .service-block__img, .service-block__content {
        width: 100%;
    }
}

/* ========================================
   Recruit Page
   ======================================== */
.recruit-message {
    text-align: center;
    max-width: 800px;
    margin: 0 auto clamp(80px, 10vw, 160px);
}

.recruit-message__title {
    font-size: clamp(2.4rem, 4vw, 3.6rem);
    font-weight: 700;
    line-height: 1.6;
    margin-bottom: 4rem;
}

.recruit-message__text {
    font-size: 1.6rem;
    line-height: 2;
}

.recruit-requirements {
    max-width: 900px;
    margin: 0 auto;
}

.recruit-requirements__title {
    font-size: 2.4rem;
    font-weight: 700;
    margin-bottom: 3rem;
    text-align: center;
    position: relative;
    display: block;
    width: max-content;
    margin-left: auto;
    margin-right: auto;
}
.recruit-requirements__title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--color-black);
}

/* ========================================
   Contact Page
   ======================================== */
.contact-form {
    max-width: 800px;
    margin: 0 auto;
    background-color: var(--color-bg-light);
    padding: clamp(40px, 6vw, 80px);
}

.form-group {
    margin-bottom: 40px;
}

.form-label {
    display: block;
    font-weight: 700;
    margin-bottom: 15px;
}

.form-label .required {
    background-color: var(--color-accent);
    color: var(--color-white);
    font-size: 1.2rem;
    padding: 2px 8px;
    margin-left: 10px;
    border-radius: 2px;
}

.form-control {
    width: 100%;
    padding: 15px;
    border: 1px solid var(--color-border);
    background-color: var(--color-white);
    font-family: inherit;
    font-size: 1.6rem;
    transition: border-color var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-black);
}

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

.form-submit {
    text-align: center;
    margin-top: 60px;
}

.btn--submit {
    width: 240px;
    height: 60px;
    background-color: var(--color-black);
    color: var(--color-white);
    font-size: 1.6rem;
    border: none;
    font-weight: 700;
    letter-spacing: 0.1em;
    cursor: pointer;
    transition: background-color var(--transition-fast);
}
.btn--submit:hover {
    background-color: var(--color-gray);
}

@media screen and (max-width: 768px) {
    .contact-form {
        padding: 30px 20px;
    }
}


/* ========================================
   Data Table
   ======================================== */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 40px;
    font-size: 1.5rem;
}
.data-table th, .data-table td {
    border-bottom: 1px solid var(--color-border);
    padding: 20px 10px;
    text-align: left;
    vertical-align: top;
    line-height: 1.6;
}
.data-table th {
    font-weight: 700;
    color: var(--color-gray);
    border-bottom: 2px solid var(--color-black);
}
.works-table__year {
    font-weight: 700;
    letter-spacing: 0.05em;
}