/* ============================================================
   Front Page Styles
   ============================================================ */

/* Hero (動画 FV) */
.hero {
    position: relative;
    width: 100%;
    height: 100svh;
    min-height: 600px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: -110px;
}

.hero__video-wrap {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero__video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to bottom,
        rgba(0,0,0,0.4) 0%,
        rgba(0,0,0,0.2) 50%,
        rgba(0,0,0,0.6) 100%
    );
    z-index: 1;
}

.hero__content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--color-white);
    padding-inline: var(--container-pad);
}

.hero__catch {
    font-family: var(--font-en);
    font-size: clamp(4rem, 7vw, 8rem);
    font-weight: 700;
    letter-spacing: 0.08em;
    line-height: 1.15;
    text-transform: uppercase;
    margin-bottom: 20px;
    opacity: 0;
    transform: translateY(30px);
    animation: heroFadeUp 1.2s ease 0.5s forwards;
}

.hero__sub {
    font-size: clamp(1.4rem, 2vw, 1.8rem);
    letter-spacing: 0.25em;
    color: rgba(255,255,255,0.85);
    margin-bottom: 40px;
    opacity: 0;
    transform: translateY(20px);
    animation: heroFadeUp 1.2s ease 0.8s forwards;
}

.hero__cta {
    opacity: 0;
    animation: heroFadeUp 1.2s ease 1.1s forwards;
}

.hero__scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: rgba(255,255,255,0.7);
    font-family: var(--font-en);
    font-size: 1.1rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    opacity: 0;
    animation: heroFadeUp 1.2s ease 1.5s forwards;
}

.hero__scroll-line {
    width: 1px;
    height: 50px;
    background: linear-gradient(to bottom, rgba(255,255,255,0.7), transparent);
    animation: scrollLine 1.8s ease-in-out infinite;
}

@keyframes heroFadeUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scrollLine {
    0%, 100% { transform: scaleY(1); transform-origin: top; }
    50% { transform: scaleY(0.5); transform-origin: bottom; }
}

/* ============================================================
   News / お知らせ
   ============================================================ */
.top-news {
    background: var(--color-bg-2);
}

.top-news__list {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.top-news__item {
    display: grid;
    grid-template-columns: 120px 80px 1fr;
    align-items: center;
    gap: 20px;
    padding: 20px 0;
    border-bottom: 1px solid var(--color-border);
}

.top-news__date {
    font-family: var(--font-en);
    font-size: 1.3rem;
    color: var(--color-text-2);
    letter-spacing: 0.1em;
}

.top-news__category {
    display: inline-block;
    background: var(--color-accent);
    color: var(--color-black);
    font-size: 1.1rem;
    padding: 2px 10px;
    letter-spacing: 0.05em;
    text-align: center;
}

.top-news__title a {
    font-size: 1.5rem;
    color: var(--color-text);
    transition: color var(--transition);
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.top-news__title a:hover {
    color: var(--color-accent);
}

/* ============================================================
   Works Section (トップ施工実績)
   ============================================================ */
.top-works {
    background: var(--color-bg);
}

.top-works__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2px;
}

.top-works__more {
    text-align: center;
    margin-top: 50px;
}

/* ============================================================
   About Section
   ============================================================ */
.top-about {
    background: var(--color-bg-2);
}

.top-about__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(40px, 6vw, 100px);
    align-items: center;
}

.top-about__text h2 {
    font-family: var(--font-en);
    font-size: clamp(2.8rem, 4vw, 4.4rem);
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: 24px;
    color: var(--color-black);
}

.top-about__text p {
    font-size: 1.5rem;
    color: var(--color-text-2);
    margin-bottom: 32px;
    line-height: 1.9;
}

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

/* ============================================================
   Navigation Links Section（4ボタン）
   ============================================================ */
.top-nav-links {
    background: var(--color-bg-3);
}

.top-nav-links__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2px;
}

.top-nav-link {
    position: relative;
    overflow: hidden;
    aspect-ratio: 3 / 2;
    display: flex;
    align-items: flex-end;
}

.top-nav-link__img {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.top-nav-link__img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.7s ease;
}

.top-nav-link:hover .top-nav-link__img img {
    transform: scale(1.06);
}

.top-nav-link__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.75) 0%, transparent 60%);
    z-index: 1;
    transition: background var(--transition);
}

.top-nav-link:hover .top-nav-link__overlay {
    background: linear-gradient(to top, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0.3) 60%);
}

.top-nav-link__body {
    position: relative;
    z-index: 2;
    padding: 24px;
    width: 100%;
}

.top-nav-link__en {
    display: block;
    font-family: var(--font-en);
    font-size: 1.1rem;
    letter-spacing: 0.2em;
    color: var(--color-accent);
    text-transform: uppercase;
    margin-bottom: 6px;
}

.top-nav-link__ja {
    display: block;
    font-size: 1.7rem;
    font-weight: 700;
    color: var(--color-white);
}
.works-card__tags{
    margin-top: 2rem;
}
.works-card__tag {
    display: inline-block;
    font-size: 1.2rem;
    padding: 4px 14px;
    border: 1px solid var(--color-accent);
    color: var(--color-accent);
    letter-spacing: 0.05em;
    transition: all var(--transition);
    text-decoration: none;
}

.works-card__tag:hover {
    background: var(--color-accent);
    color: var(--color-black);
}


/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 960px) {
    .top-works__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .top-nav-links__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .top-about__inner {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .top-works__grid {
        grid-template-columns: 1fr;
    }
    .top-nav-links__grid {
        grid-template-columns: 1fr 1fr;
    }
    .top-news__item {
        grid-template-columns: 1fr;
        gap: 8px;
    }
}