/* ===== Design tokens ===== */
:root {
  /* Colors */
  --color-main: #701818;
  --color-accent: #C03838;
  --color-text: #1A1A1A;
  --color-muted: #666;
  --color-bg: #FFFFFF;
  --color-bg-soft: #FAFAFA;
  --color-border: #E0E0E0;

  /* Typography */
  --font-sans: -apple-system, "Helvetica Neue", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  --fw-regular: 400;
  --fw-bold: 700;
  --fw-black: 800;
  --line-height-body: 1.7;
  --line-height-title: 1.25;

  /* Spacing scale */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;

  /* Layout */
  --content-max: 1120px;
  --radius: 4px;
  --shadow-1: 0 1px 2px rgba(0,0,0,.04);
  --shadow-2: 0 8px 24px rgba(0,0,0,.08);
}

html { scroll-behavior: smooth; scroll-padding-top: 80px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

/* ===== Modern reset ===== */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: var(--fw-regular);
  line-height: var(--line-height-body);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
}
img, svg, video { max-width: 100%; height: auto; display: block; }
a { color: var(--color-main); text-decoration: none; }
a:hover { color: var(--color-accent); text-decoration: underline; }
button { font: inherit; cursor: pointer; }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }

/* ===== Container ===== */
.container {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-weight: var(--fw-bold);
  font-size: 14px;
  letter-spacing: 0.04em;
  transition: background-color .2s, color .2s, border-color .2s;
  text-decoration: none;
  cursor: pointer;
  background: transparent;
}
.btn-primary { background: var(--color-main); color: #fff; }
.btn-primary:hover { background: var(--color-accent); color: #fff; text-decoration: none; }
.btn-outline { color: var(--color-main); border-color: var(--color-main); }
.btn-outline:hover { background: var(--color-main); color: #fff; text-decoration: none; }
.btn-accent { background: var(--color-accent); color: #fff; }
.btn-accent:hover { background: var(--color-main); color: #fff; }

/* ===== Section heading ===== */
.section { padding: var(--space-8) 0; }
.section-tag {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.25em;
  color: var(--color-main);
  font-weight: var(--fw-bold);
  margin-bottom: var(--space-3);
  text-transform: uppercase;
}
.section-title {
  font-size: 28px;
  font-weight: var(--fw-bold);
  line-height: var(--line-height-title);
  margin: 0 0 var(--space-5);
  color: var(--color-text);
}
.section-lead { color: var(--color-muted); font-size: 15px; max-width: 64ch; }

/* ===== Header ===== */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.95);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 2px solid var(--color-main);
  box-shadow: var(--shadow-1);
}
.site-header__inner { display: flex; align-items: center; justify-content: space-between; min-height: 64px; }
.site-header__brand { display: flex; align-items: center; gap: var(--space-3); color: var(--color-text); }
.site-header__brand:hover { text-decoration: none; }
.site-header__logo { width: 40px; height: 36px; object-fit: contain; }
.site-header__brand-name { font-weight: var(--fw-bold); font-size: 14px; letter-spacing: .04em; }

.site-nav__list {
  list-style: none; margin: 0; padding: 0;
  display: flex; align-items: center; gap: var(--space-5);
}
.site-nav__list a { color: var(--color-text); font-size: 14px; font-weight: var(--fw-bold); }
.site-nav__list a:hover { color: var(--color-accent); text-decoration: none; }
.btn-sm { padding: 6px 12px; font-size: 12px; }

.site-nav__toggle { display: none; background: none; border: 0; padding: 8px; }
.site-nav__toggle span {
  display: block; width: 22px; height: 2px; background: var(--color-text);
  margin: 4px 0; transition: transform .2s, opacity .2s;
}

@media (max-width: 768px) {
  .site-nav__toggle { display: block; }
  .site-nav__list {
    position: absolute; top: 100%; right: 0; left: 0;
    background: #fff; border-bottom: 1px solid var(--color-border);
    flex-direction: column; align-items: stretch; gap: 0;
    padding: var(--space-3) 0;
    transform: translateY(-110%); transition: transform .25s ease;
  }
  .site-nav[data-open="true"] .site-nav__list { transform: translateY(0); }
  .site-nav__list li { padding: 0 var(--space-5); }
  .site-nav__list a { display: block; padding: var(--space-3) 0; }
}

/* ===== Hero ===== */
.hero {
  background: linear-gradient(180deg, var(--color-bg-soft) 0%, var(--color-bg) 100%);
  padding: var(--space-8) 0;
}
.hero__inner { max-width: 880px; }
.hero__eyebrow {
  font-size: 12px; letter-spacing: 0.3em; color: var(--color-main);
  font-weight: var(--fw-bold); margin: 0 0 var(--space-4); text-transform: uppercase;
}
.hero__title {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: var(--fw-black);
  line-height: var(--line-height-title);
  margin: 0 0 var(--space-5);
  letter-spacing: -.01em;
}
@media (min-width: 900px) {
  .hero__title { white-space: nowrap; }
}
.hero__title-accent { color: var(--color-accent); }
.hero__tagline-ja {
  font-size: clamp(16px, 2vw, 19px);
  font-weight: var(--fw-bold);
  margin: 0 0 var(--space-2);
  color: var(--color-text);
}
.hero__tagline-en {
  font-size: 14px; color: var(--color-muted); margin: 0 0 var(--space-6);
}
.hero__ctas { display: flex; gap: var(--space-3); flex-wrap: wrap; }

/* ===== About ===== */
.about__grid {
  display: grid; gap: var(--space-6);
  grid-template-columns: 1.4fr 1fr;
}
@media (max-width: 768px) { .about__grid { grid-template-columns: 1fr; } }

.about__facts { margin: 0; }
.about__fact { display: grid; grid-template-columns: 8em 1fr; gap: var(--space-4); padding: var(--space-3) 0; border-bottom: 1px solid var(--color-border); }
.about__fact dt { font-weight: var(--fw-bold); color: var(--color-muted); font-size: 13px; }
.about__fact dd { margin: 0; font-size: 15px; }
.about__fact [data-placeholder] { color: var(--color-muted); font-style: italic; }

.about__jeep {
  background: var(--color-bg-soft); border-left: 4px solid var(--color-main);
  padding: var(--space-5); border-radius: 0 var(--radius) var(--radius) 0;
}
.about__jeep-eyebrow { font-size: 11px; letter-spacing: .3em; color: var(--color-main); margin: 0 0 var(--space-2); font-weight: var(--fw-bold); }
.about__jeep-title { font-size: 18px; font-weight: var(--fw-bold); margin: 0 0 var(--space-3); }
.about__jeep p { margin: 0; font-size: 14px; color: var(--color-text); }

/* ===== Materials ===== */
.materials { background: var(--color-bg-soft); }
.pdf-list { list-style: none; padding: 0; margin: var(--space-6) 0 0; display: grid; gap: var(--space-3); max-width: 720px; }
.pdf-list__item {
  display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius);
  transition: border-color .2s, box-shadow .2s;
  text-decoration: none; color: var(--color-text);
}
.pdf-list__item:hover:not(.pdf-list__item--placeholder) { border-color: var(--color-main); box-shadow: var(--shadow-2); }
.pdf-list__icon { font-size: 24px; }
.pdf-list__label { font-weight: var(--fw-bold); font-size: 15px; }
.pdf-list__meta { font-size: 12px; color: var(--color-muted); }
.pdf-list__item--placeholder { background: repeating-linear-gradient(45deg, #fff, #fff 8px, #FAFAFA 8px, #FAFAFA 16px); color: var(--color-muted); cursor: not-allowed; }
.materials__note { font-size: 12px; color: var(--color-muted); margin-top: var(--space-4); }

/* ===== Business grid ===== */
.business-grid {
  list-style: none; padding: 0; margin: var(--space-6) 0 0;
  display: grid; gap: var(--space-5);
  grid-template-columns: repeat(3, minmax(0, 1fr));
  grid-auto-rows: 1fr;
}
@media (max-width: 1024px) { .business-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .business-grid { grid-template-columns: 1fr; } }

.business-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius);
  padding: var(--space-5);
  display: flex; flex-direction: column; gap: var(--space-4);
  transition: box-shadow .2s, border-left-color .2s, transform .2s;
}
.business-card:hover { box-shadow: var(--shadow-2); border-left-color: var(--color-main); transform: translateY(-2px); }

.business-card__head { display: flex; align-items: baseline; gap: var(--space-3); }
.business-card__no { font-family: Georgia, serif; font-size: 22px; color: var(--color-main); font-weight: var(--fw-bold); }
.business-card__title { font-size: 17px; font-weight: var(--fw-bold); margin: 0; line-height: 1.4; }

.business-card__img { width: 100%; aspect-ratio: 1 / 1; object-fit: cover; border-radius: var(--radius); background: var(--color-bg-soft); display: block; }

.business-card__list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 4px; }
.business-card__list li {
  font-size: 13px; color: var(--color-text);
  padding-left: 14px; position: relative;
}
.business-card__list li::before {
  content: ""; position: absolute; left: 0; top: 9px;
  width: 6px; height: 6px; background: var(--color-accent); border-radius: 50%;
}

.business-card__links { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-top: auto; }
.business-card__links .btn-sm { font-size: 11px; }

/* ===== News ===== */
.news__list { list-style: none; padding: 0; margin: 0; display: grid; gap: var(--space-3); grid-template-columns: repeat(4, minmax(0, 220px)); justify-content: start; }
@media (max-width: 900px) { .news__list { grid-template-columns: repeat(2, minmax(0, 220px)); } }
@media (max-width: 480px) { .news__list { grid-template-columns: 1fr; } }
.news__item { background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius); padding: 0; overflow: hidden; transition: box-shadow .2s, border-color .2s; display: block; color: var(--color-text); }
.news__item:hover { border-color: var(--color-main); box-shadow: var(--shadow-2); text-decoration: none; }
.news__date { font-size: 12px; color: var(--color-muted); margin: 0 0 var(--space-2); }
.news__title { font-size: 15px; font-weight: var(--fw-bold); margin: 0 0 var(--space-2); line-height: 1.4; }
.news__excerpt { font-size: 13px; color: var(--color-muted); margin: 0; line-height: 1.6; }
.news__skeleton { background: var(--color-bg-soft); border: 1px solid var(--color-border); border-radius: var(--radius); height: 120px; animation: skeleton-pulse 1.4s ease-in-out infinite; }
@keyframes skeleton-pulse { 0%,100% { opacity: 1; } 50% { opacity: .55; } }
.news__error { background: var(--color-bg-soft); padding: var(--space-4); border-radius: var(--radius); border: 1px dashed var(--color-border); color: var(--color-muted); }
.news__cta { margin-top: var(--space-5); }

/* ===== Contact ===== */
.contact { background: var(--color-bg-soft); }
.contact__cta { margin-top: var(--space-5); }

/* ===== Footer ===== */
.site-footer { background: var(--color-main); color: #fff; padding: var(--space-6) 0; margin-top: var(--space-8); }
.site-footer__copyright { text-align: center; font-size: 12px; color: rgba(255,255,255,.85); margin: 0; }

/* ===== Skip link ===== */
.skip-link { position: absolute; left: -9999px; top: 0; background: var(--color-main); color: #fff; padding: 10px 14px; z-index: 100; }
.skip-link:focus { left: 0; }
.site-footer__logo { width: 56px; height: 50px; object-fit: contain; margin-bottom: var(--space-3); filter: brightness(0) invert(1) opacity(0.95); background: rgba(255,255,255,.9); padding: 4px; border-radius: var(--radius); }

/* ===== News thumbnail ===== */
.news__image { width: 100%; aspect-ratio: 1 / 1; object-fit: cover; background: var(--color-bg-soft); display: block; }
.news__image--placeholder { background: linear-gradient(135deg, var(--color-bg-soft) 0%, #f0e8e6 100%); position: relative; }
.news__image--placeholder::after { content: "📰"; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); font-size: 32px; opacity: .5; }
.news__body { padding: var(--space-4); }