/* ===== Design Tokens (DESIGN.md) ===== */
:root {
  --color-bg: #ffffff;
  --color-surface: #f4f5f6;
  --color-ink: #1a1d21;
  --color-muted: #5b626b;
  --color-steel-900: #1d2024;
  --color-steel-700: #363b41;
  --color-steel-500: #6b7280;
  --color-accent: #b3402a;
  --color-accent-deep: #8c2f20;
  --color-brass: #a8842c;
  --color-line: #e0e2e5;

  --font-serif: "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --font-sans: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Meiryo", "Yu Gothic", sans-serif;
  --font-en: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 32px;
  --space-xl: 64px;

  --max-width: 1120px;
  --header-height: 72px;
  --transition: 0.25s ease;
}

/* ===== Reset & Base ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.8;
  letter-spacing: 0.04em;
  color: var(--color-ink);
  background: var(--color-bg);
  font-feature-settings: "palt" 1, "kern" 1;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

p, li, td, th, dd, dt {
  line-break: strict;
  word-break: normal;
  overflow-wrap: break-word;
}

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

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

ul {
  list-style: none;
}

.num {
  font-family: var(--font-en);
  letter-spacing: 0;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

@media (min-width: 768px) {
  .container {
    padding: 0 24px;
  }
}

/* ===== Skip Link ===== */
.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  z-index: 9999;
  padding: 8px 16px;
  background: var(--color-accent);
  color: #fff;
  border-radius: 4px;
  font-weight: 500;
}

.skip-link:focus {
  top: 16px;
  outline: 2px solid var(--color-brass);
  outline-offset: 2px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 12px 24px;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  border-radius: 4px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
}

.btn:focus-visible {
  outline: 2px solid var(--color-brass);
  outline-offset: 2px;
}

.btn--primary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}

.btn--primary:hover {
  background: var(--color-accent-deep);
  border-color: var(--color-accent-deep);
}

.btn--secondary {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.7);
}

.btn--secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #fff;
}

.btn--tel {
  background: var(--color-accent);
  color: #fff;
  padding: 8px 16px;
  font-size: 0.875rem;
  white-space: nowrap;
}

.btn--tel:hover {
  background: var(--color-accent-deep);
}

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
  transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
  overflow: visible;
}

body.menu-open .header {
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}

.header--scrolled {
  background: var(--color-steel-900);
  border-bottom-color: rgba(255, 255, 255, 0.08);
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.2);
}

.header--scrolled .header__name,
.header--scrolled .nav-link {
  color: #fff;
}

.header--scrolled .header__logo,
.header--scrolled .footer__logo {
  filter: brightness(0) invert(1);
}

.header--scrolled .nav-link:hover,
.header--scrolled .nav-link.is-active {
  color: var(--color-brass);
}

.header__inner,
.header__wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 16px;
  overflow: visible;
}

.header__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.header__logo {
  width: 40px;
  height: 40px;
  object-fit: contain;
}

.header__name {
  font-family: var(--font-serif);
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 10em;
}

@media (min-width: 480px) {
  .header__name {
    max-width: none;
  }
}

.header__nav {
  display: none;
}

.header__nav-list {
  display: flex;
  gap: 4px;
}

.nav-link {
  display: block;
  padding: 8px 12px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-ink);
  border-radius: 4px;
  transition: color var(--transition), background var(--transition);
}

.nav-link:hover,
.nav-link.is-active {
  color: var(--color-accent);
}

.header--scrolled .nav-link:hover,
.header--scrolled .nav-link.is-active {
  background: rgba(255, 255, 255, 0.08);
}

.header__tel {
  display: none;
}

.header__menu-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  padding: 0;
  background: none;
  border: none;
  cursor: pointer;
  position: relative;
  z-index: 1002;
}

.header__menu-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-ink);
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}

.header--scrolled .header__menu-bar {
  background: #fff;
}

.header__menu-btn[aria-expanded="true"] .header__menu-bar:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.header__menu-btn[aria-expanded="true"] .header__menu-bar:nth-child(2) {
  opacity: 0;
}

.header__menu-btn[aria-expanded="true"] .header__menu-bar:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

.header__menu-btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Mobile nav overlay */
.header__overlay {
  display: none;
  position: fixed;
  inset: 0;
  top: var(--header-height);
  background: rgba(0, 0, 0, 0.4);
  z-index: 1000;
}

.header__overlay.is-visible {
  display: block;
}

/* Mobile nav open */
.header__nav.is-open {
  display: block;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1001;
  background: var(--color-steel-900);
  padding: 24px 20px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.header__nav.is-open .header__nav-list {
  flex-direction: column;
  gap: 0;
}

.header__nav.is-open .nav-link {
  color: #fff;
  font-size: 1rem;
  padding: 16px 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.header__nav.is-open .nav-link:hover,
.header__nav.is-open .nav-link.is-active {
  color: var(--color-brass);
  background: rgba(255, 255, 255, 0.05);
}

@media (min-width: 1024px) {
  .header__wrapper {
    gap: 24px;
  }

  .header__nav {
    display: block;
    position: static;
    flex: 1;
    padding: 0;
    background: none;
    overflow: visible;
  }

  .header__nav-list {
    justify-content: center;
    flex-wrap: wrap;
  }

  .header__tel {
    display: inline-flex;
    flex-shrink: 0;
  }

  .header__menu-btn,
  .header__overlay {
    display: none !important;
  }
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  padding: calc(var(--header-height) + 48px) 0 64px;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background-image: url("../assets/images/IMG_0955.webp");
  background-size: cover;
  background-position: center;
  filter: grayscale(0.15) contrast(1.05);
}

@supports not (background-image: url("../assets/images/IMG_0955.webp")) {
  .hero__bg {
    background-image: url("../assets/images/IMG_0955.jpg");
  }
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    rgba(20, 22, 25, 0.72) 0%,
    rgba(20, 22, 25, 0.55) 50%,
    rgba(20, 22, 25, 0.75) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 1;
  color: #fff;
  max-width: 720px;
}

.hero__badge {
  display: inline-block;
  padding: 6px 16px;
  margin-bottom: 20px;
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--color-brass);
  border: 1px solid var(--color-brass);
  border-radius: 2px;
}

.hero__title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -0.01em;
  margin-bottom: 16px;
}

.hero__lead {
  font-size: clamp(0.9375rem, 2.5vw, 1.0625rem);
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.88);
  margin-bottom: 32px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 40px;
}

.hero__trust {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.hero__trust li {
  padding: 6px 14px;
  font-size: 0.75rem;
  font-weight: 500;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 2px;
}

/* ===== Sections ===== */
.section {
  padding: var(--space-xl) 0;
}

.section--surface {
  background: var(--color-surface);
}

.section--dark {
  background: var(--color-steel-900);
  color: #fff;
}

.section--contact {
  background: var(--color-steel-700);
  color: #fff;
}

.section__header {
  margin-bottom: var(--space-lg);
  text-align: center;
}

.section__header--light .section__label,
.section__header--light .section__desc {
  color: rgba(255, 255, 255, 0.7);
}

.section__header--light .section__title {
  color: #fff;
}

.section__label {
  font-family: var(--font-en);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 8px;
}

.section__title {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
}

.section__desc {
  font-size: 0.9375rem;
  color: var(--color-muted);
  max-width: 640px;
  margin: 0 auto;
}

.section--dark .section__desc,
.section--contact .section__desc {
  color: rgba(255, 255, 255, 0.75);
}

/* ===== Reveal Animation ===== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ===== Cards ===== */
.cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 768px) {
  .cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

.card {
  background: var(--color-bg);
  border: 1px solid var(--color-line);
  border-radius: 8px;
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
}

.card:hover {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  transform: translateY(-2px);
}

.card__image {
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

.card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition);
  filter: grayscale(0.15) contrast(1.05);
}

.card:hover .card__image img {
  transform: scale(1.04);
}

.card__image--placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface);
}

.card__icon {
  font-size: 3rem;
  opacity: 0.5;
}

.card__body {
  padding: 20px;
}

.card__title {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.card__text {
  font-size: 0.875rem;
  color: var(--color-muted);
  line-height: 1.8;
}

/* ===== Products ===== */
.product-block {
  margin-bottom: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--color-line);
}

.product-block:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.product-block__header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.product-block__title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  padding-left: 12px;
  border-left: 4px solid var(--color-accent);
}

.product-block__photo {
  width: 120px;
  border-radius: 4px;
  overflow: hidden;
  flex-shrink: 0;
}

.product-block__photo img {
  width: 100%;
  height: 80px;
  object-fit: cover;
  filter: grayscale(0.15) contrast(1.05);
  transition: transform var(--transition);
}

.product-block__photo:hover img {
  transform: scale(1.04);
}

@media (min-width: 768px) {
  .product-block__photo {
    width: 160px;
  }

  .product-block__photo img {
    height: 100px;
  }
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  padding: 6px 14px;
  font-size: 0.8125rem;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: 4px;
  transition: background var(--transition), border-color var(--transition);
}

.tag:hover {
  background: #fff;
  border-color: var(--color-accent);
}

.product-block__note {
  margin-top: 16px;
  font-size: 0.875rem;
  color: var(--color-muted);
}

/* ===== Equipment ===== */
.equipment-grid {
  display: grid;
  gap: 32px;
}

@media (min-width: 768px) {
  .equipment-grid {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}

.equipment-photos {
  display: grid;
  gap: 16px;
}

.equipment-photo {
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--color-line);
}

.equipment-photo img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  filter: grayscale(0.15) contrast(1.05);
  transition: transform var(--transition);
}

.equipment-photo:hover img {
  transform: scale(1.04);
}

.equipment-lists {
  display: grid;
  gap: 24px;
}

.equipment-list__title {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-accent);
}

.equipment-list__items li {
  position: relative;
  padding: 10px 0 10px 20px;
  font-size: 0.9375rem;
  border-bottom: 1px solid var(--color-line);
}

.equipment-list__items li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
}

/* ===== History ===== */
.history {
  display: grid;
  gap: 32px;
}

@media (min-width: 768px) {
  .history {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }
}

.history__figure {
  position: relative;
  padding: 12px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 4px;
  box-shadow: inset 0 0 0 1px rgba(168, 132, 44, 0.2);
}

.history__figure img {
  width: 100%;
  border-radius: 2px;
  filter: sepia(0.1);
}

.history__caption {
  margin-top: 12px;
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.6);
  text-align: center;
}

.history__timeline {
  display: grid;
  gap: 24px;
}

.history__year {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-brass);
  margin-bottom: 8px;
}

.history__desc {
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.8;
}

/* ===== Company Table ===== */
.company-table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--color-line);
  border-radius: 8px;
  overflow: hidden;
}

.company-table th,
.company-table td {
  padding: 16px 20px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--color-line);
  font-size: 0.9375rem;
}

.company-table tr:last-child th,
.company-table tr:last-child td {
  border-bottom: none;
}

.company-table th {
  width: 28%;
  min-width: 120px;
  background: var(--color-surface);
  font-weight: 500;
  white-space: nowrap;
}

@media (max-width: 767px) {
  .company-table,
  .company-table tbody,
  .company-table tr,
  .company-table th,
  .company-table td {
    display: block;
    width: 100%;
  }

  .company-table th {
    padding-bottom: 4px;
    border-bottom: none;
    background: transparent;
    color: var(--color-muted);
    font-size: 0.8125rem;
  }

  .company-table td {
    padding-top: 0;
    padding-bottom: 16px;
  }
}

/* ===== Access ===== */
.access-grid {
  display: grid;
  gap: 32px;
}

@media (min-width: 768px) {
  .access-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.access-photo {
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 20px;
  border: 1px solid var(--color-line);
}

.access-photo img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.access-address {
  font-style: normal;
  font-size: 0.9375rem;
  line-height: 1.8;
  margin-bottom: 24px;
}

.hours__title {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.hours__item {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  padding: 10px 0;
  border-bottom: 1px solid var(--color-line);
  font-size: 0.9375rem;
}

.hours__item dt {
  font-weight: 500;
}

.access-map iframe {
  width: 100%;
  height: 100%;
  min-height: 320px;
  border-radius: 8px;
  border: 1px solid var(--color-line);
}

/* ===== Contact ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 32px;
}

@media (min-width: 768px) {
  .contact-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.contact-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 120px;
  padding: 24px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 8px;
  text-align: center;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}

.contact-card:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}

.contact-card--primary {
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.contact-card--primary:hover {
  background: var(--color-accent-deep);
  border-color: var(--color-accent-deep);
}

.contact-card--static {
  cursor: default;
}

.contact-card--static:hover {
  transform: none;
}

.contact-card__label {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 8px;
}

.contact-card__value {
  font-family: var(--font-en);
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  font-weight: 600;
  letter-spacing: 0;
}

.contact-card:focus-visible {
  outline: 2px solid var(--color-brass);
  outline-offset: 2px;
}

.contact-hours {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.contact-hours__title {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.contact-hours p {
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.85);
}

/* ===== Footer ===== */
.footer {
  background: var(--color-steel-900);
  color: rgba(255, 255, 255, 0.85);
  padding: 48px 0 32px;
}

.footer__inner {
  display: grid;
  gap: 32px;
}

.footer__brand {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.footer__logo {
  filter: brightness(0) invert(1);
  flex-shrink: 0;
}

.footer__name {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.footer__address,
.footer__tel {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.8;
}

.footer__nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
}

.footer__nav a {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.65);
  transition: color var(--transition);
}

.footer__nav a:hover {
  color: var(--color-brass);
}

.footer__nav a:focus-visible {
  outline: 2px solid var(--color-brass);
  outline-offset: 2px;
  border-radius: 2px;
}

.footer__copy {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.45);
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

@media (min-width: 768px) {
  .footer__inner {
    grid-template-columns: 1fr auto;
    grid-template-rows: auto auto;
  }

  .footer__copy {
    grid-column: 1 / -1;
  }
}