:root {
    --bg-dark: #0f1115;
    --bg-card: rgba(30, 34, 42, 0.7);
    --accent-orange: #ff4d00;
    --accent-blue: #00a2ff;
    --text-main: #f8f9fa;
    --text-muted: #adb5bd;
    --glass-border: rgba(255, 255, 255, 0.1);
    --transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: 'Inter', 'Noto Sans JP', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

/* --- Scrollbar --- */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--bg-dark); }
::-webkit-scrollbar-thumb { background: #333; border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent-orange); }

/* --- Header --- */
header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(15, 17, 21, 0.8);
    backdrop-filter: blur(15px);
    border-bottom: 1px solid var(--glass-border);
    padding: 1rem 0;
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

nav { display: flex; justify-content: space-between; align-items: center; }

.logo {
    font-size: 1.5rem;
    font-weight: 900;
    letter-spacing: -1px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.logo span { color: var(--accent-orange); }

.nav-links { display: flex; gap: 30px; list-style: none; }
.nav-links a {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 700;
    font-size: 0.85rem;
    letter-spacing: 1px;
    transition: var(--transition);
}
.nav-links a:hover,
.nav-links a.active { color: var(--accent-orange); }

/* --- Hero (index only) --- */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)),
        url('image/facility/gunma-branch-exterior-full.jpg') no-repeat center center/cover;
    overflow: hidden;
}
.hero::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0;
    width: 100%; height: 200px;
    background: linear-gradient(to top, var(--bg-dark), transparent);
}
.hero-content { position: relative; z-index: 10; max-width: 850px; }
.hero h1 {
    font-size: clamp(2.5rem, 8vw, 5.5rem);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 2rem;
    letter-spacing: -2px;
}
.hero h1 span {
    display: block;
    background: linear-gradient(90deg, #ff4d00, #ffae00);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.hero p {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    max-width: 600px;
}

/* --- Page Hero (sub-pages) --- */
.page-hero {
    padding: 160px 0 80px;
    border-bottom: 1px solid var(--glass-border);
}
.page-hero h1 {
    font-size: clamp(2rem, 6vw, 4rem);
    font-weight: 900;
    letter-spacing: -2px;
    margin-bottom: 0.5rem;
}

/* --- Buttons --- */
.btn {
    display: inline-block;
    padding: 1.1rem 2.8rem;
    border-radius: 4px;
    font-weight: 700;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-size: 0.95rem;
    letter-spacing: 1px;
}
.btn-primary {
    background: var(--accent-orange);
    color: white;
    box-shadow: 0 10px 25px rgba(255, 77, 0, 0.35);
}
.btn-primary:hover {
    transform: translateY(-4px);
    box-shadow: 0 15px 35px rgba(255, 77, 0, 0.5);
    filter: brightness(1.1);
}

/* --- Sections --- */
section { padding: 120px 0; }

.section-header { margin-bottom: 80px; }
.section-header h2 {
    font-size: 3rem;
    font-weight: 900;
    letter-spacing: -1px;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 20px;
}
.section-header h2::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--glass-border);
}
.section-number {
    font-size: 1rem;
    color: var(--accent-orange);
    font-family: serif;
    font-style: italic;
    margin-bottom: 10px;
    display: block;
}

/* --- Service Cards --- */
.grid-services {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
}
.service-card {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    padding: 50px;
    transition: var(--transition);
    position: relative;
}
.service-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 4px; height: 0;
    background: var(--accent-orange);
    transition: var(--transition);
}
.service-card:hover { background: rgba(255,255,255,0.03); border-color: rgba(255,255,255,0.2); }
.service-card:hover::before { height: 100%; }
.service-card h3 { font-size: 1.6rem; margin-bottom: 1.8rem; font-weight: 800; }
.service-card ul { list-style: none; }
.service-card li {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 12px;
}
/* ・を縦にそろえる2カラムリスト（左項目は均等割付） */
.service-card .spec-list li {
    display: grid;
    grid-template-columns: 5.5em 1em 1fr;
    column-gap: 0.3em;
    align-items: baseline;
}
.service-card .spec-list li .l {
    text-align: justify;
    text-align-last: justify; /* 左項目を5.5em幅に均等割付して・の位置を固定 */
}
.service-card .spec-list li span:last-child {
    white-space: nowrap;
}
/* 右項目も均等割付でそろえる（最長語の幅に合わせて短い語を広げる） */
.service-card .spec-list-just li {
    grid-template-columns: 5.5em 1em 4em;
}
.service-card .spec-list-just li span:last-child {
    text-align: justify;
    text-align-last: justify;
}

/* --- Equipment Gallery --- */
.work-gallery {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}
.work-gallery--product { grid-template-columns: repeat(4, 1fr); }
.work-item { position: relative; overflow: hidden; border-radius: 2px; }
.work-item img {
    width: 100%; height: auto;
    aspect-ratio: 1000 / 562;   /* 拠点写真の比率（16:9相当） */
    object-fit: cover;
    display: block;
    transition: transform 0.6s ease;
}
/* 製品ギャラリーは別比率：固定高さで表示 */
.work-gallery--product .work-item img {
    aspect-ratio: auto;
    height: 450px;
}
.work-details {
    position: absolute;
    bottom: 0; left: 0;
    width: 100%;
    padding: 40px;
    background: linear-gradient(to top, rgba(0,0,0,0.9), transparent);
    transform: translateY(20px);
    opacity: 0;
    transition: var(--transition);
}
.work-item:hover .work-details { transform: translateY(0); opacity: 1; }
.work-details h4 { font-size: 1.4rem; margin-bottom: 10px; }

/* --- Stats --- */
.stats-strip {
    padding: 80px 0;
    background: #fff;
    color: #000;
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 40px;
}
.stat-item { text-align: center; }
.stat-val { font-size: 4rem; font-weight: 900; line-height: 1; }
.stat-label { font-size: 0.8rem; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; }

/* --- Locations --- */
.location-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
    gap: 30px;
}
.location-card {
    padding: 40px;
    border: 1px solid var(--glass-border);
    position: relative;
    background: rgba(255,255,255,0.01);
}
.loc-tag { color: var(--accent-orange); font-size: 0.75rem; font-weight: 700; letter-spacing: 2px; margin-bottom: 15px; display: block; }
.factory-tag { color: var(--accent-orange); font-size: 0.75rem; font-weight: 700; letter-spacing: 2px; margin-bottom: 15px; display: block; line-height: 1.8; }
.location-card h4 { font-size: 1.8rem; margin-bottom: 2rem; font-weight: 900; }
.info-row { margin-bottom: 15px; font-size: 0.95rem; }
.info-label { color: var(--text-muted); display: block; font-size: 0.8rem; margin-bottom: 5px; }

/* --- Footer --- */
footer { padding: 100px 0 50px; background: #000; }
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 80px;
}
.footer-logo { font-size: 2.5rem; font-weight: 900; margin-bottom: 20px; }
.footer-logo span { color: var(--accent-orange); }
.footer-bottom {
    padding-top: 40px;
    border-top: 1px solid rgba(255,255,255,0.05);
    display: flex;
    justify-content: space-between;
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* --- Factory Exterior Photo --- */
.factory-exterior {
    width: 100%;
    height: 420px;
    object-fit: cover;
    margin-bottom: 20px;
    display: block;
}

/* --- Equipment Gallery (small) --- */
.work-item-sm {
    height: auto;
}


/* --- Factory Sections --- */
.factory-section {
    margin-bottom: 100px;
}
.factory-header {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--glass-border);
}
.factory-tag {
    color: var(--accent-orange);
    font-size: 1.8rem;
    font-weight: 900;
    letter-spacing: 2px;
}
.factory-header h3 {
    font-size: 1.2rem;
    font-weight: 900;
}
.equip-list {
    list-style: none;
    margin: 4px 0 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 4px 24px;
}
.equip-list li {
    display: flex;
    justify-content: flex-start;
    align-items: baseline;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-muted);
    padding: 2px 0;
    border-bottom: 1px dotted var(--glass-border);
}
.equip-list .equip-qty {
    color: var(--accent-orange);
    font-weight: 700;
    white-space: nowrap;
}
.factory-construction {
    padding: 60px 40px;
    border: 1px dashed var(--glass-border);
    color: var(--text-muted);
    font-size: 0.95rem;
    letter-spacing: 2px;
    text-align: center;
}

/* --- Animations --- */
[data-reveal] { opacity: 0; transform: translateY(30px); transition: 1s cubic-bezier(0.165, 0.84, 0.44, 1); }
[data-reveal].active { opacity: 1; transform: translateY(0); }

/* --- Hamburger --- */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1100;
}
.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-main);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease;
    transform-origin: center;
}
.hamburger.open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* --- Mobile Menu --- */
.mobile-menu {
    position: fixed;
    inset: 0;
    background: var(--bg-dark);
    z-index: 999;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transform: translateX(100%);
    transition: transform 0.55s cubic-bezier(0.4, 0, 0.2, 1);
    border-left: 1px solid var(--glass-border);
    padding-top: 70px; /* 固定ヘッダーと重ならないよう下げる */
}
.mobile-menu.open { transform: translateX(0); }
.mobile-menu ul { list-style: none; text-align: center; margin-bottom: 40px; }
.mobile-menu ul li {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.4s ease, transform 0.4s ease;
}
.mobile-menu.open ul li:nth-child(1) { opacity: 1; transform: none; transition-delay: 0.15s; }
.mobile-menu.open ul li:nth-child(2) { opacity: 1; transform: none; transition-delay: 0.22s; }
.mobile-menu.open ul li:nth-child(3) { opacity: 1; transform: none; transition-delay: 0.29s; }
.mobile-menu.open ul li:nth-child(4) { opacity: 1; transform: none; transition-delay: 0.36s; }
.mobile-menu.open ul li:nth-child(5) { opacity: 1; transform: none; transition-delay: 0.43s; }
.mobile-menu.open ul li:nth-child(6) { opacity: 1; transform: none; transition-delay: 0.50s; }
.mobile-menu ul li a {
    color: rgba(255,255,255,0.85);
    text-decoration: none;
    font-size: 1.8rem;
    font-weight: 900;
    letter-spacing: 0.05em;
    display: block;
    padding: 16px 50px;
    transition: color 0.3s;
}
.mobile-menu ul li a:hover { color: var(--accent-orange); }
.mobile-contact {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.4s ease, transform 0.4s ease;
}
.mobile-menu.open .mobile-contact {
    opacity: 1;
    transform: none;
    transition-delay: 0.55s;
}

/* --- Responsive --- */
@media (max-width: 900px) {
    .footer-grid { grid-template-columns: 1fr; gap: 40px; }
    .hero h1 { font-size: 3.5rem; }
    .grid-services { grid-template-columns: 1fr; }
    .work-gallery { grid-template-columns: 1fr; }
    .work-gallery--product { grid-template-columns: repeat(2, 1fr); }
    .location-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .container { padding: 0 20px; }
    .nav-links, header nav > a.btn { display: none; }
    .hamburger { display: flex; }
    .page-hero { padding: 120px 0 60px; }
    section { padding: 80px 0; }
    .section-header { margin-bottom: 50px; }
    .section-header h2 { font-size: 2rem; }
    .work-item { height: auto; }
    .work-gallery--product .work-item img { height: 240px; }
    .work-details {
        position: relative;
        transform: none;
        opacity: 1;
        background: rgba(0,0,0,0.7);
        padding: 16px;
    }
    .stats-strip { flex-direction: column; align-items: center; }
    .hero h1 { font-size: 2.2rem; letter-spacing: -1px; }
    .hero h1 span { white-space: normal; }
    .map-grid { grid-template-columns: 1fr !important; }
    .about-intro-grid { grid-template-columns: 1fr !important; gap: 40px !important; }
    .history-list > div { grid-template-columns: 1fr !important; gap: 6px !important; padding: 16px 0 !important; }
    .vision-message-grid { grid-template-columns: 1fr !important; gap: 40px !important; }
    .vision-target-grid { grid-template-columns: 1fr !important; }
    .vision-target-grid > div { padding: 40px 20px !important; }
    .vision-target-grid > div > div[style*="5rem"] { font-size: 3.5rem !important; }
    .vision-challenges-grid { grid-template-columns: 1fr !important; }
    .vision-strategy-grid { grid-template-columns: 1fr !important; }
    .recruit-message-grid { grid-template-columns: 1fr !important; gap: 40px !important; }
    .chart-bars { gap: 4px !important; }
    .chart-labels { gap: 4px !important; overflow: hidden; }
    .chart-labels > div { font-size: 0.6rem !important; writing-mode: vertical-rl; transform: rotate(180deg); text-align: left !important; padding-top: 4px; }
    .company-table, .company-table tbody { display: block; }
    .company-table tr { display: block; border-bottom: 1px solid var(--glass-border); }
    .company-table tr:last-child { border-bottom: none; }
    .company-table th,
    .company-table td { display: block; width: 100%; padding: 10px 20px; white-space: normal; }
    .company-table th { padding-bottom: 4px; border-bottom: none; }
    .company-table td { padding-top: 4px; }
    .maker-grid { grid-template-columns: repeat(2, 1fr) !important; }
    .affiliation-grid { grid-template-columns: 1fr !important; }
    .vision-message { font-size: 1.8rem !important; }
}