/* =========================
   Base
========================= */

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: #0f0f10;
    color: #f2f2f2;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.8;
}

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

a {
    color: inherit;
    text-decoration: none;
}

p {
    margin: 0 0 1.4rem;
}

h1,
h2,
h3 {
    margin: 0 0 1rem;
    line-height: 1.3;
}

h1 {
    font-size: clamp(2.4rem, 5vw, 4.8rem);
    letter-spacing: 0.08em;
}

h2 {
    font-size: clamp(1.8rem, 3vw, 2.6rem);
}

h3 {
    font-size: 1.2rem;
}

/* =========================
   Header
========================= */

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(15, 15, 16, 0.9);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(12px);
}

.site-header__inner {
    width: min(1120px, calc(100% - 40px));
    margin: 0 auto;
    padding: 18px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
}

.site-logo {
    font-weight: 700;
    letter-spacing: 0.08em;
}

.site-nav {
    display: flex;
    gap: 20px;
    font-size: 0.9rem;
    color: #cfcfcf;
}

    .site-nav a {
        transition: color 0.2s ease;
    }

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

/* =========================
   Hero
========================= */

.hero {
    width: min(1120px, calc(100% - 40px));
    margin: 0 auto;
    padding: 96px 0;
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 56px;
    align-items: center;
}

.hero__lead {
    max-width: 680px;
    color: #d8d8d8;
    font-size: 1.05rem;
}

.eyebrow {
    margin-bottom: 14px;
    color: #b89b5e;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.hero__visual {
    min-height: 360px;
}

/* 仮画像エリア */
.image-placeholder {
    width: 100%;
    aspect-ratio: 16 / 9;
    border: 1px solid rgba(184, 155, 94, 0.45);
    border-radius: 18px;
    background: linear-gradient(135deg, rgba(184, 155, 94, 0.18), transparent 50%), linear-gradient(180deg, #1c1c1f, #101012);
    display: grid;
    place-items: center;
    text-align: center;
    color: #cfcfcf;
}

    .image-placeholder span {
        display: block;
        font-size: 1.2rem;
        font-weight: 700;
        letter-spacing: 0.08em;
    }

    .image-placeholder small {
        display: block;
        margin-top: 6px;
        color: #888;
    }

/* =========================
   Buttons / Links
========================= */

.button-group {
    margin-top: 32px;
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 10px 20px;
    border-radius: 999px;
    font-weight: 700;
    transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

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

.button--primary {
    background: #b89b5e;
    color: #101010;
}

.button--secondary {
    border: 1px solid rgba(255, 255, 255, 0.24);
    color: #f2f2f2;
}

    .button--secondary:hover {
        border-color: rgba(255, 255, 255, 0.5);
    }

.text-link {
    color: #d8bd7a;
    font-weight: 700;
    border-bottom: 1px solid rgba(216, 189, 122, 0.45);
}

    .text-link:hover {
        color: #f2d98f;
    }

/* =========================
   Sections
========================= */

.section {
    padding: 88px 0;
}

.section--dark {
    background: #141416;
}

.section--contact {
    background: linear-gradient(135deg, rgba(184, 155, 94, 0.14), transparent 45%), #111112;
}

.section__inner {
    width: min(1120px, calc(100% - 40px));
    margin: 0 auto;
}

.section__inner--narrow {
    width: min(860px, calc(100% - 40px));
}

.section h2 {
    padding-bottom: 18px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.section__action {
    margin-top: 28px;
}

/* =========================
   Feature Cards
========================= */

.feature-grid {
    margin-top: 36px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

.feature-card {
    padding: 24px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.035);
}

    .feature-card h3 {
        color: #f1d28a;
    }

    .feature-card p {
        color: #d1d1d1;
        font-size: 0.95rem;
    }

/* =========================
   Page Hero
========================= */

.page-hero {
    padding: 96px 0 72px;
    background: linear-gradient(135deg, rgba(184, 155, 94, 0.16), transparent 45%), #141416;
}

.page-hero__inner {
    width: min(960px, calc(100% - 40px));
    margin: 0 auto;
}

.page-hero p {
    color: #d8d8d8;
    max-width: 720px;
}

/* =========================
   Info List
========================= */

.info-list {
    margin: 32px 0 0;
    display: grid;
    gap: 0;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
}

    .info-list div {
        display: grid;
        grid-template-columns: 220px 1fr;
        gap: 24px;
        padding: 18px 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    }

    .info-list dt {
        color: #b89b5e;
        font-weight: 700;
    }

    .info-list dd {
        margin: 0;
        color: #f2f2f2;
    }

/* =========================
   Footer
========================= */

.site-footer {
    padding: 32px 0;
    color: #999;
    background: #09090a;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.site-footer__inner {
    width: min(1120px, calc(100% - 40px));
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    gap: 24px;
    font-size: 0.85rem;
}

.site-footer a {
    color: #bbb;
}

    .site-footer a:hover {
        color: #fff;
    }

/* =========================
   Responsive
========================= */

@media (max-width: 840px) {
    .site-header__inner {
        flex-direction: column;
        align-items: flex-start;
    }

    .site-nav {
        flex-wrap: wrap;
        gap: 14px;
    }

    .hero {
        grid-template-columns: 1fr;
        padding: 72px 0;
    }

    .hero__visual {
        min-height: auto;
    }

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

    .info-list div {
        grid-template-columns: 1fr;
        gap: 4px;
    }

    .site-footer__inner {
        flex-direction: column;
    }
}

@media (max-width: 520px) {
    .site-header__inner,
    .hero,
    .section__inner,
    .section__inner--narrow,
    .page-hero__inner,
    .site-footer__inner {
        width: min(100% - 28px, 1120px);
    }

    .section {
        padding: 64px 0;
    }

    .page-hero {
        padding: 72px 0 56px;
    }

    .button {
        width: 100%;
    }
}