:root {
    --color-bg: #020202;
    --color-text: #f0f0f0;
    --color-accent: #E60012;
    --color-gold: #D4AF37;
    --color-sub: #888888;
    --color-card-bg: #0a0a0a;
    --font-base: 'Noto Sans JP', sans-serif;
    --font-en: 'Outfit', sans-serif;
    --easing: cubic-bezier(0.25, 0.1, 0.25, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-base);
    line-height: 1.8;
    overflow-x: hidden;
    position: relative;
}

/* Texture Overlay */
.texture-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.07;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s var(--easing);
}

ul {
    list-style: none;
}

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

/* Typography Utility */
.text-gradient {
    background: linear-gradient(90deg, #fff 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 700;
}

/* Layout Utility */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 8rem 0;
    position: relative;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* Subtle Vignette for Sections */
.section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, transparent 0%, rgba(0, 0, 0, 0.5) 100%);
    pointer-events: none;
    z-index: -1;
}

.section__header {
    text-align: center;
    margin-bottom: 5rem;
}

.section__title {
    font-family: var(--font-en);
    font-size: 3rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    margin-bottom: 0.5rem;
    position: relative;
    display: inline-block;
}

.section__title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: var(--color-accent);
}

.section__subtitle {
    color: var(--color-sub);
    font-size: 0.9rem;
    letter-spacing: 0.1em;
    margin-top: 1rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 1rem 3rem;
    border: 1px solid var(--color-text);
    color: var(--color-text);
    font-family: var(--font-en);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    position: relative;
    overflow: hidden;
    z-index: 1;
    cursor: pointer;
    background: transparent;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 100%;
    background-color: var(--color-text);
    transition: width 0.3s var(--easing);
    z-index: -1;
}

.btn:hover {
    color: var(--color-bg);
}

.btn:hover::before {
    width: 100%;
}

.btn--submit {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.btn--submit::before {
    background-color: var(--color-accent);
}

.btn--submit:hover {
    color: #fff;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(5, 5, 5, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: background-color 0.4s var(--easing),
        box-shadow 0.4s var(--easing);
}

.header--scrolled {
    background-color: rgba(2, 2, 2, 0.97);
    box-shadow: 0 2px 30px rgba(0, 0, 0, 0.5);
}

.header__inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
    padding: 0 5%;
}

.logo img {
    height: 40px;
}

/* Navigation */
.nav__list {
    display: flex;
    align-items: center;
    gap: 3rem;
}

.nav__item {
    font-family: var(--font-en);
    font-weight: 500;
    font-size: 0.9rem;
    letter-spacing: 0.05em;
}

.nav__link {
    position: relative;
    padding: 0.3rem 0;
    transition: color 0.3s var(--easing);
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: width 0.3s var(--easing);
}

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

.nav__link.active {
    color: var(--color-accent);
}

.btn--nav {
    padding: 0.5rem 1.5rem;
    font-size: 0.8rem;
}

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

/* Hamburger */
.hamburger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001;
    position: relative;
    width: 32px;
    height: 24px;
}

.hamburger__line {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-text);
    position: absolute;
    left: 0;
    transition: all 0.3s var(--easing);
}

.hamburger__line:nth-child(1) {
    top: 0;
}

.hamburger__line:nth-child(2) {
    top: 50%;
    transform: translateY(-50%);
}

.hamburger__line:nth-child(3) {
    bottom: 0;
}

/* Hamburger Active State */
.hamburger.active .hamburger__line:nth-child(1) {
    top: 50%;
    transform: translateY(-50%) rotate(45deg);
}

.hamburger.active .hamburger__line:nth-child(2) {
    opacity: 0;
}

.hamburger.active .hamburger__line:nth-child(3) {
    bottom: 50%;
    transform: translateY(50%) rotate(-45deg);
}

/* Hero */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero__bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, #1a1a1a 0%, #050505 70%);
    z-index: -1;
}

/* Cross line effect */
.hero__bg::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background-image:
        linear-gradient(45deg, transparent 49%, var(--color-text) 49%, var(--color-text) 51%, transparent 51%),
        linear-gradient(-45deg, transparent 49%, var(--color-accent) 49%, var(--color-accent) 51%, transparent 51%);
    background-size: 2px 2px;
    opacity: 0.05;
    animation: rotate 60s linear infinite;
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

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

.hero__sub {
    font-size: 1rem;
    color: var(--color-sub);
    letter-spacing: 0.2em;
    margin-bottom: 1.5rem;
    font-weight: 500;
    text-transform: none;
}

.hero__title {
    font-family: var(--font-en);
    font-size: 6vw;
    line-height: 0.9;
    font-weight: 700;
    margin-bottom: 2rem;
    letter-spacing: -0.02em;
}

/* Glitch Effect */
.glitch {
    position: relative;
    display: inline-block;
}

.hero__desc {
    font-size: 1.1rem;
    color: var(--color-sub);
    letter-spacing: 0.1em;
    line-height: 2;
    font-weight: 500;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.8rem;
    animation: fadeInUp 1s ease 1.5s both;
}

.mouse {
    width: 26px;
    height: 42px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 20px;
    position: relative;
}

.mouse__wheel {
    width: 3px;
    height: 8px;
    background-color: var(--color-accent);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scrollWheel 1.5s ease-in-out infinite;
}

@keyframes scrollWheel {
    0% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }

    100% {
        opacity: 0;
        transform: translateX(-50%) translateY(16px);
    }
}

.scroll-indicator__text {
    font-family: var(--font-en);
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    color: rgba(255, 255, 255, 0.3);
    text-transform: uppercase;
}

/* Concept */
.concept__body {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.concept__lead {
    font-family: var(--font-en);
    font-size: 2.5rem;
    margin-bottom: 3rem;
    line-height: 1.2;
}

.concept__text {
    font-size: 1.1rem;
    line-height: 2.2;
}

/* Services */
.services__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.service-card {
    background-color: var(--color-card-bg);
    padding: 3rem;
    border: 1px solid #1f1f1f;
    transition: transform 0.4s var(--easing),
        border-color 0.4s var(--easing),
        box-shadow 0.4s var(--easing),
        background-color 0.4s var(--easing);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 50% 0%, rgba(230, 0, 18, 0.06) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.4s var(--easing);
    pointer-events: none;
}

.service-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-accent);
    box-shadow: 0 20px 40px rgba(230, 0, 18, 0.08),
        0 0 60px rgba(230, 0, 18, 0.03);
    background-color: #0e0e0e;
}

.service-card:hover::before {
    opacity: 1;
}

.service-card__icon {
    font-family: var(--font-en);
    font-size: 3rem;
    font-weight: 700;
    color: #222;
    position: absolute;
    top: 1rem;
    right: 2rem;
    transition: all 0.4s var(--easing);
}

.service-card:hover .service-card__icon {
    color: var(--color-accent);
    opacity: 0.3;
    transform: scale(1.1);
}

.service-card h3 {
    font-family: var(--font-en);
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    transition: color 0.3s var(--easing);
}

.service-card:hover h3 {
    color: #fff;
}

.service-card .ja {
    color: var(--color-accent);
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    display: block;
}

.service-card .desc {
    color: var(--color-sub);
    font-size: 0.95rem;
    line-height: 1.8;
    transition: color 0.3s var(--easing);
}

.service-card:hover .desc {
    color: #aaa;
}

.services__tagline {
    text-align: center;
    margin-top: 4rem;
    font-size: 1.2rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    color: var(--color-text);
}

/* Contact */
.contact__form {
    max-width: 700px;
    margin: 0 auto;
}

.form__group {
    margin-bottom: 2rem;
}

.form__group label {
    display: block;
    margin-bottom: 0.8rem;
    font-size: 0.9rem;
    letter-spacing: 0.05em;
}

.form__group input,
.form__group textarea,
.form__group select {
    width: 100%;
    background-color: var(--color-card-bg);
    border: 1px solid #333;
    padding: 1rem;
    color: var(--color-text);
    font-family: var(--font-base);
    font-size: 1rem;
    transition: border-color 0.3s var(--easing),
        box-shadow 0.3s var(--easing);
    border-radius: 0;
    -webkit-appearance: none;
}

.form__group input:focus,
.form__group textarea:focus,
.form__group select:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 20px rgba(230, 0, 18, 0.1);
}

.form__btn {
    text-align: center;
    margin-top: 3rem;
}

.form__status {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 0.95rem;
    padding: 0;
    transition: all 0.3s var(--easing);
}

.form__status--success {
    color: #4CAF50;
    padding: 1rem;
    border: 1px solid rgba(76, 175, 80, 0.3);
    background: rgba(76, 175, 80, 0.05);
}

.form__status--error {
    color: var(--color-accent);
    padding: 1rem;
    border: 1px solid rgba(230, 0, 18, 0.3);
    background: rgba(230, 0, 18, 0.05);
}

/* Footer */
.footer {
    padding: 3rem 0;
    text-align: center;
    border-top: 1px solid #1a1a1a;
    color: var(--color-sub);
    font-size: 0.8rem;
    font-family: var(--font-en);
}

/* Company */
.company__list {
    max-width: 800px;
    margin: 0 auto;
    border-top: 1px solid #1f1f1f;
}

.company__row {
    display: flex;
    padding: 1.5rem 0;
    border-bottom: 1px solid #1f1f1f;
}

.company__row dt {
    width: 200px;
    font-weight: 700;
    flex-shrink: 0;
}

.company__row dd {
    flex: 1;
    color: var(--color-sub);
}

/* Scroll Animations */
[data-animate] {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s var(--easing),
        transform 0.8s var(--easing);
}

[data-animate].animated {
    opacity: 1;
    transform: translateY(0);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

/* Company Info Image */
.company__image-wrapper {
    max-width: 800px;
    margin: 0 auto;
    border-top: 1px solid #1f1f1f;
    padding: 2rem 0;
}

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

/* Responsive */
@media (max-width: 768px) {
    .hamburger {
        display: block;
    }

    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background-color: rgba(5, 5, 5, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        padding: 6rem 2rem 2rem;
        transition: right 0.4s var(--easing);
        z-index: 999;
        border-left: 1px solid rgba(255, 255, 255, 0.05);
    }

    .nav.open {
        right: 0;
    }

    .nav__list {
        flex-direction: column;
        gap: 0;
        align-items: stretch;
    }

    .nav__item {
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }

    .nav__link {
        display: block;
        padding: 1.2rem 0;
        font-size: 1.1rem;
    }

    .nav__link.btn--nav {
        text-align: center;
        margin-top: 1rem;
        border: 1px solid var(--color-accent);
        padding: 1rem;
    }

    /* Overlay when nav is open */
    .nav-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0, 0, 0, 0.6);
        z-index: 998;
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.4s var(--easing);
    }

    .nav-overlay.visible {
        opacity: 1;
        pointer-events: auto;
    }

    .company__row {
        flex-direction: column;
        gap: 0.5rem;
    }

    .company__row dt {
        width: 100%;
    }

    .header__inner {
        padding: 0 1rem;
    }

    .hero__title {
        font-size: 15vw;
    }

    .hero__sub {
        font-size: 0.85rem;
        letter-spacing: 0.1em;
    }

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

    .section__title {
        font-size: 2rem;
    }

    .concept__lead {
        font-size: 1.8rem;
    }

    .section {
        padding: 5rem 0;
    }

    .service-card {
        padding: 2rem;
    }
}

@media (max-width: 480px) {
    .hero__title {
        font-size: 18vw;
    }

    .hero__desc {
        font-size: 0.9rem;
    }

    .concept__text {
        font-size: 1rem;
    }
}