:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --line: #d5dbe4;
  --text: #111827;
  --muted: #4b5563;
  --accent: #1f3f8f;
  --header-height: 76px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  color: var(--text);
  background: var(--bg);
  font-family:
    "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  line-height: 1.75;
  letter-spacing: 0.02em;
  overflow-x: hidden;
}

body.is-loading {
  overflow: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  touch-action: manipulation;
}

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

button {
  border: none;
  background: transparent;
  color: inherit;
  font: inherit;
  cursor: pointer;
  touch-action: manipulation;
}

ul,
ol {
  list-style: none;
}

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

main {
  overflow: clip;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: 14px;
  z-index: 210;
  background: var(--text);
  color: #fff;
  padding: 10px 14px;
  transform: translateY(-140%);
  transition: transform 0.2s ease;
}

.skip-link:focus-visible {
  transform: translateY(0);
}

.site-header {
  position: fixed;
  inset: 12px 0 auto;
  height: calc(var(--header-height) - 12px);
  width: min(1320px, calc(100% - 24px));
  margin-inline: auto;
  z-index: 110;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-radius: 99px;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.4);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.03);
  padding: 0 16px;
  transition:
    background 0.3s ease,
    box-shadow 0.3s ease;
}

.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.site-brand {
  margin-left: 16px;
  display: flex;
  align-items: center;
}

.site-brand img {
  height: 28px;
  width: auto;
  object-fit: contain;
}

.menu-toggle {
  width: 46px;
  height: 46px;
  border: 1px solid var(--line);
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 6px;
  margin-right: 8px;
  background: #fff;
}

.menu-toggle span {
  width: 18px;
  height: 2px;
  background: var(--text);
  transition:
    transform 0.24s ease,
    opacity 0.24s ease;
}

.menu-toggle.is-open span:first-child {
  transform: translateY(8px) rotate(45deg);
}

.menu-toggle.is-open span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.is-open span:last-child {
  transform: translateY(-8px) rotate(-45deg);
}

.global-nav {
  margin-right: 12px;
}

.global-nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
}

.global-nav a {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 14px;
  border-radius: 99px;
  background: transparent;
  font-family: "Inter", sans-serif;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition:
    color 0.2s ease,
    background-color 0.2s ease;
}

.global-nav a:hover,
.global-nav a:focus-visible,
.global-nav a[aria-current="page"] {
  color: var(--accent);
  background: rgba(31, 63, 143, 0.06);
}

.nav-scrim {
  display: none;
}

.button {
  min-height: 44px;
  padding: 10px 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 99px;
  font-family: "Inter", sans-serif;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  transition:
    transform 0.2s ease,
    border-color 0.2s ease,
    color 0.2s ease,
    background-color 0.2s ease;
}

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

.button--ghost {
  background: #fff;
  color: var(--text);
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
  border-color: var(--accent);
}

.section-block {
  width: min(1200px, calc(100% - 48px));
  margin-inline: auto;
  padding-block: 120px;
}

section[id] {
  scroll-margin-top: calc(var(--header-height) + 24px);
}

.section-head {
  margin-bottom: 44px;
}

.section-head__kicker {
  font-family: "Inter", sans-serif;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--accent);
  font-weight: 600;
}

.section-head__title {
  margin-top: 10px;
  font-family: "Inter", sans-serif;
  font-size: clamp(1.7rem, 4vw, 3.35rem);
  line-height: 1.2;
  letter-spacing: 0.03em;
  font-weight: 600;
}

.site-footer {
  width: min(1200px, calc(100% - 48px));
  margin-inline: auto;
  padding: 26px 0 68px;
}

.site-footer__inner {
  border: 1px solid var(--line);
  background: var(--surface);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
  padding: 28px;
}

.site-footer h2 {
  font-family: "Inter", sans-serif;
  font-size: 1rem;
  margin-bottom: 8px;
}

.site-footer p {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 12px;
}

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

.site-footer__copy {
  margin-top: 18px;
  text-align: center;
  color: var(--muted);
  font-size: 0.75rem;
}

.back-to-top {
  display: block;
  min-height: 44px;
  margin: 14px auto 0;
  border: 1px solid var(--line);
  padding: 10px 16px;
  font-family: "Inter", sans-serif;
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition:
    opacity 0.24s ease,
    transform 0.24s ease;
}

.back-to-top.is-visible {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

@media (max-width: 1040px) {
  .menu-toggle {
    display: flex;
  }

  .global-nav {
    position: fixed;
    top: 0;
    right: -1px;
    width: min(84vw, 360px);
    height: 100vh;
    transform: translateX(calc(100% + 2px));
    transition: transform 0.28s var(--ease-out);
    background: #fff;
    border-left: 1px solid var(--line);
    margin-right: 0;
    padding: 88px 20px 20px;
    z-index: 120;
    visibility: hidden;
  }

  .global-nav.is-open {
    transform: translateX(0);
    visibility: visible;
  }

  .global-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 7px;
  }

  .global-nav a {
    justify-content: flex-start;
    border-color: var(--line);
    font-size: 0.84rem;
    padding-inline: 14px;
  }

  .nav-scrim {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(17, 24, 39, 0.45);
    z-index: 115;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
  }

  .nav-scrim.is-open {
    opacity: 1;
    pointer-events: auto;
  }

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

@media (max-width: 760px) {
  .section-block {
    width: min(1200px, calc(100% - 28px));
    padding-block: 86px;
  }

  .site-header {
    width: calc(100% - 12px);
  }

  .site-footer {
    width: min(1200px, calc(100% - 28px));
    padding-bottom: 54px;
  }

  .site-footer__inner {
    padding: 22px;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}