/* ========================================
   RESET
======================================== */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family:
        Inter,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        "Noto Sans JP",
        sans-serif;

    background: #080a0d;
    color: #f4f5f7;

    line-height: 1.7;

    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
}

.container {
    width: min(1180px, 90%);
    margin: 0 auto;
}


/* ========================================
   HEADER
======================================== */

.header {
    height: 76px;

    display: flex;
    align-items: center;

    border-bottom: 1px solid #20242b;

    background: rgba(8, 10, 13, 0.92);

    position: sticky;
    top: 0;

    z-index: 100;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    text-decoration: none;

    font-size: 18px;
    font-weight: 800;

    letter-spacing: 4px;
}

.nav {
    display: flex;
    gap: 34px;
}

.nav a {
    text-decoration: none;

    font-size: 13px;

    color: #949ca8;

    transition: 0.2s;
}

.nav a:hover {
    color: #ffffff;
}


/* ========================================
   GENERAL
======================================== */

.eyebrow {
    color: #6e7eff;

    font-size: 12px;
    font-weight: 600;

    letter-spacing: 4px;

    margin-bottom: 20px;
}

.section {
    padding: 130px 0;
}

.section-heading {
    display: flex;

    justify-content: space-between;
    align-items: end;

    margin-bottom: 60px;
}

.section-heading h2 {
    font-size: clamp(38px, 5vw, 62px);

    letter-spacing: -2px;

    line-height: 1;
}

.section-description {
    max-width: 420px;

    color: #8e96a3;

    font-size: 14px;
}


/* ========================================
   HERO
======================================== */

.hero {
    min-height: calc(100vh - 76px);

    display: flex;
    align-items: center;

    border-bottom: 1px solid #20242b;
}

.hero-inner {
    display: grid;

    grid-template-columns: 1.1fr 0.9fr;

    align-items: center;

    gap: 80px;

    padding: 100px 0;
}

.hero-content h1 {
    font-size: clamp(68px, 8vw, 112px);

    line-height: 0.9;

    letter-spacing: -6px;

    margin-bottom: 25px;
}

.hero-jp {
    font-size: 23px;

    font-weight: 600;

    margin-bottom: 22px;
}

.hero-description {
    max-width: 560px;

    color: #959daa;

    font-size: 16px;

    margin-bottom: 38px;
}

.hero-actions {
    display: flex;

    gap: 12px;
}

.button-primary,
.button-secondary {
    display: inline-block;

    padding: 13px 22px;

    border-radius: 5px;

    text-decoration: none;

    font-size: 13px;
    font-weight: 700;

    transition: 0.2s;
}

.button-primary {
    background: #ffffff;
    color: #080a0d;
}

.button-primary:hover {
    transform: translateY(-2px);
}

.button-secondary {
    border: 1px solid #343a44;

    color: #b7bec9;
}

.button-secondary:hover {
    border-color: #69717e;
    color: #ffffff;
}


/* ========================================
   HERO VISUAL
======================================== */

.hero-visual {
    display: flex;
    justify-content: flex-end;
}

.visual-box {
    width: min(430px, 100%);
    aspect-ratio: 1 / 1;

    border: 1px solid #282d35;

    background:
        linear-gradient(
            135deg,
            #101319,
            #090b0e
        );

    padding: 25px;

    display: flex;
    flex-direction: column;

    justify-content: space-between;
}

.visual-top {
    display: flex;
    justify-content: space-between;

    color: #646d79;

    font-size: 11px;

    letter-spacing: 2px;
}

.visual-center {
    position: relative;

    height: 270px;

    display: flex;
    align-items: center;
    justify-content: center;
}

.core {
    width: 70px;
    height: 70px;

    border-radius: 50%;

    background: #6e7eff;

    display: flex;
    align-items: center;
    justify-content: center;

    font-size: 30px;
    font-weight: 800;

    z-index: 3;
}

.orbit {
    position: absolute;

    border: 1px solid #333a46;

    border-radius: 50%;
}

.orbit-1 {
    width: 130px;
    height: 130px;
}

.orbit-2 {
    width: 200px;
    height: 200px;
}

.orbit-3 {
    width: 270px;
    height: 270px;
}

.visual-bottom {
    color: #646d79;

    font-size: 10px;

    letter-spacing: 3px;
}


/* ========================================
   PRODUCTS
======================================== */

.products-section {
    background: #0b0e12;
}

.product-grid {
    display: grid;

    grid-template-columns:
        repeat(3, 1fr);

    gap: 18px;
}

.product-card {
    min-height: 440px;

    background: #11151a;

    border: 1px solid #252a32;

    padding: 28px;

    display: flex;
    flex-direction: column;

    transition: 0.25s;
}

.product-card:hover {
    transform: translateY(-5px);

    border-color: #454d59;
}

.product-card.featured {
    background:
        linear-gradient(
            145deg,
            #151923,
            #101318
        );
}

.product-header {
    display: flex;

    justify-content: space-between;
    align-items: center;

    margin-bottom: 65px;
}

.product-number {
    color: #646d79;

    font-size: 12px;
}

.status {
    font-size: 10px;

    color: #8e96a3;

    border: 1px solid #343a44;

    padding: 4px 8px;

    border-radius: 20px;
}

.product-category {
    color: #6e7eff;

    font-size: 10px;

    letter-spacing: 2px;

    margin-bottom: 8px;
}

.product-card h3 {
    font-size: 31px;

    letter-spacing: -1px;

    margin-bottom: 17px;
}

.product-description {
    color: #8e96a3;

    font-size: 14px;
}

.product-footer {
    margin-top: auto;

    display: flex;

    justify-content: space-between;
    align-items: end;

    gap: 20px;
}

.tags {
    display: flex;

    flex-wrap: wrap;

    gap: 6px;
}

.tags span {
    color: #868e9a;

    background: #1a1f26;

    padding: 4px 8px;

    font-size: 10px;
}

.product-link {
    font-size: 12px;

    white-space: nowrap;
}

.product-link.disabled {
    color: #555e69;
}

.empty-card {
    background: transparent;
}


/* ========================================
   ABOUT
======================================== */

.about-section {
    border-top: 1px solid #20242b;
}

.about-grid {
    display: grid;

    grid-template-columns: 1fr 1fr;

    gap: 100px;
}

.about-title h2 {
    font-size: clamp(54px, 7vw, 88px);

    line-height: 0.9;

    letter-spacing: -5px;
}

.about-content {
    padding-top: 45px;
}

.about-lead {
    font-size: 24px;

    line-height: 1.6;

    margin-bottom: 35px;
}

.about-content > p:not(.about-lead) {
    color: #8e96a3;
}

.principles {
    margin-top: 55px;

    border-top: 1px solid #272c34;
}

.principle {
    padding: 16px 0;

    border-bottom: 1px solid #272c34;

    display: flex;

    gap: 35px;

    align-items: center;
}

.principle span {
    color: #59616d;

    font-size: 11px;
}

.principle p {
    font-size: 14px;
}


/* ========================================
   CONTACT
======================================== */

.contact-section {
    padding: 120px 0;

    background: #11151a;

    border-top: 1px solid #252a32;
}

.contact-inner {
    display: flex;

    align-items: end;

    justify-content: space-between;

    gap: 50px;
}

.contact-inner h2 {
    font-size: clamp(48px, 6vw, 80px);

    line-height: 0.95;

    letter-spacing: -4px;
}

.contact-description {
    max-width: 380px;

    color: #8e96a3;

    font-size: 14px;
}


/* ========================================
   FOOTER
======================================== */

.footer {
    border-top: 1px solid #20242b;

    padding: 30px 0;
}

.footer-inner {
    display: flex;

    align-items: center;

    justify-content: space-between;

    color: #626b77;

    font-size: 11px;
}

.footer-logo {
    color: #ffffff;

    font-weight: 800;

    letter-spacing: 3px;
}

.footer a {
    text-decoration: none;

    color: #8e96a3;
}


/* ========================================
   RESPONSIVE
======================================== */

@media (max-width: 900px) {

    .hero-inner {
        grid-template-columns: 1fr;

        gap: 60px;
    }

    .hero-visual {
        justify-content: flex-start;
    }

    .visual-box {
        max-width: 400px;
    }

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

    .product-card {
        min-height: 350px;
    }

    .about-grid {
        grid-template-columns: 1fr;

        gap: 40px;
    }

    .about-content {
        padding-top: 0;
    }

}


@media (max-width: 650px) {

    .header {
        height: 68px;
    }

    .nav {
        gap: 16px;
    }

    .nav a {
        font-size: 11px;
    }

    .hero {
        min-height: auto;
    }

    .hero-inner {
        padding: 80px 0;
    }

    .hero-content h1 {
        letter-spacing: -4px;
    }

    .hero-jp {
        font-size: 19px;
    }

    .hero-actions {
        flex-direction: column;

        align-items: flex-start;
    }

    .section {
        padding: 90px 0;
    }

    .section-heading {
        flex-direction: column;

        align-items: flex-start;

        gap: 25px;
    }

    .about-title h2 {
        letter-spacing: -3px;
    }

    .contact-inner {
        flex-direction: column;

        align-items: flex-start;
    }

    .footer-inner {
        flex-direction: column;

        align-items: flex-start;

        gap: 8px;
    }

}