:root {
  --font-jp: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  --font-en: "Montserrat", "Helvetica Neue", Arial, sans-serif;
  --color-ink: #172129;
  --color-muted: #657078;
  --color-line: #dfe6e1;
  --color-soft: #f4f7f4;
  --color-accent: #5cef26;
  --color-accent-dark: #2f8b15;
  --color-deep: #101b24;
  --color-white: #ffffff;
  --shadow-card: 0 22px 60px rgba(16, 27, 36, 0.08);
  --content-width: 1180px;
  --header-height: 88px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  color: var(--color-ink);
  background: var(--color-white);
  font-family: var(--font-jp);
  font-size: 16px;
  line-height: 1.85;
  overflow-wrap: anywhere;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
}

button,
input,
textarea,
select {
  font: inherit;
}

/* Shared layout */
.site-container {
  width: min(calc(100% - 48px), var(--content-width));
  margin-inline: auto;
}

.section-space {
  padding-block: clamp(88px, 9vw, 144px);
}

.section-heading {
  max-width: 760px;
  margin-bottom: clamp(52px, 6vw, 84px);
}

.section-heading--compact {
  margin-bottom: 48px;
}

.section-heading__label {
  margin: 0 0 14px;
  color: var(--color-accent-dark);
  font-family: var(--font-en);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.section-heading__title {
  margin: 0;
  font-size: clamp(2rem, 4.5vw, 3.7rem);
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: 0.025em;
}

/* Header and navigation */
.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  height: var(--header-height);
  border-bottom: 1px solid rgba(23, 33, 41, 0.08);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(16px);
}

.site-header__inner {
  display: flex;
  height: 100%;
  align-items: center;
  justify-content: space-between;
}

.site-header__brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
}

.site-header__logo {
  width: 168px;
  height: 64px;
  object-fit: contain;
}

.site-header__menu-button {
  display: none;
  width: 46px;
  height: 46px;
  padding: 11px;
  border: 0;
  border-radius: 50%;
  color: var(--color-ink);
  background: var(--color-soft);
  cursor: pointer;
}

.site-header__menu-line {
  display: block;
  width: 100%;
  height: 2px;
  margin-block: 5px;
  background: currentColor;
  transition: transform 180ms ease, opacity 180ms ease;
}

.site-nav {
  height: 100%;
}

.site-nav__list {
  display: flex;
  height: 100%;
  margin: 0;
  padding: 0;
  align-items: stretch;
  list-style: none;
}

.site-nav__item {
  display: flex;
}

.site-nav__link {
  position: relative;
  display: flex;
  min-width: 108px;
  padding: 17px 14px 13px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  transition: color 160ms ease;
}

.site-nav__link::after {
  position: absolute;
  right: 14px;
  bottom: -1px;
  left: 14px;
  height: 3px;
  background: var(--color-accent);
  content: "";
  opacity: 0;
  transform: scaleX(0.5);
  transition: opacity 160ms ease, transform 160ms ease;
}

.site-nav__link:hover,
.site-nav__link:focus-visible,
.site-nav__link--current {
  color: var(--color-accent-dark);
}

.site-nav__link:hover::after,
.site-nav__link:focus-visible::after,
.site-nav__link--current::after {
  opacity: 1;
  transform: scaleX(1);
}

.site-nav__label {
  font-family: var(--font-en);
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-nav__text {
  margin-top: 4px;
  color: var(--color-muted);
  font-size: 0.67rem;
  font-weight: 500;
  line-height: 1.3;
}

/* Footer */
.site-footer {
  padding-block: 58px 42px;
  border-top: 3px solid var(--color-accent);
  background: var(--color-white);
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr) auto;
  gap: 42px;
  align-items: center;
}

.site-footer__logo {
  width: 168px;
  height: 64px;
  object-fit: contain;
}

.site-footer__nav {
  display: flex;
  gap: 12px 28px;
  padding-top: 17px;
  flex-wrap: wrap;
}

.site-footer__link {
  color: #445059;
  font-size: 0.78rem;
  text-decoration: none;
}

.site-footer__link:hover,
.site-footer__link:focus-visible {
  color: var(--color-accent-dark);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.site-footer__credits {
  padding-top: 12px;
  text-align: right;
}

.site-footer__credit-link {
  display: inline-block;
  color: #4d5961;
  text-decoration: none;
  transition: color 160ms ease;
}

.site-footer__credit-link:hover,
.site-footer__credit-link:focus-visible {
  color: var(--color-accent-dark);
}

.site-footer__copyright,
.site-footer__photo-credit {
  display: block;
  font-family: var(--font-en);
  font-size: 0.7rem;
  line-height: 1.7;
}

@media (max-width: 1040px) {
  .site-nav__link {
    min-width: 90px;
    padding-inline: 9px;
  }

  .site-footer__inner {
    grid-template-columns: 180px 1fr;
  }

  .site-footer__credits {
    grid-column: 1 / -1;
    padding-top: 0;
    text-align: left;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 72px;
  }

  .site-container {
    width: min(calc(100% - 36px), var(--content-width));
  }

  .site-header__logo {
    width: 142px;
    height: auto;
  }

  .site-header__menu-button {
    display: block;
  }

  .site-header[data-nav-open="true"] .site-header__menu-line:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .site-header[data-nav-open="true"] .site-header__menu-line:nth-child(2) {
    opacity: 0;
  }

  .site-header[data-nav-open="true"] .site-header__menu-line:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .site-nav {
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    height: auto;
    max-height: 0;
    border-bottom: 1px solid var(--color-line);
    background: var(--color-white);
    opacity: 0;
    overflow: hidden;
    pointer-events: none;
    transition: max-height 240ms ease, opacity 180ms ease;
  }

  .site-header[data-nav-open="true"] .site-nav {
    max-height: calc(100vh - var(--header-height));
    opacity: 1;
    overflow-y: auto;
    pointer-events: auto;
  }

  .site-nav__list {
    display: block;
    height: auto;
    padding: 12px 18px 20px;
  }

  .site-nav__item {
    display: block;
    border-bottom: 1px solid var(--color-line);
  }

  .site-nav__link {
    min-width: 0;
    padding: 15px 6px;
    flex-direction: row;
    justify-content: flex-start;
  }

  .site-nav__link::after {
    top: 14px;
    right: auto;
    bottom: 14px;
    left: -18px;
    width: 3px;
    height: auto;
    transform: scaleY(0.5);
  }

  .site-nav__link:hover::after,
  .site-nav__link:focus-visible::after,
  .site-nav__link--current::after {
    transform: scaleY(1);
  }

  .site-nav__label {
    width: 112px;
  }

  .site-nav__text {
    margin-top: 0;
    font-size: 0.76rem;
  }

  .site-footer__inner {
    grid-template-columns: 1fr;
    gap: 26px;
  }

  .site-footer__nav {
    padding-top: 0;
  }

  .site-footer__credits {
    grid-column: auto;
  }
}

@media (max-width: 560px) {
  body {
    font-size: 15px;
  }

  .section-space {
    padding-block: 76px;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}