/* Utingna brand site — tokens */
:root {
  --color-ink: #0f1419;
  --color-ink-soft: #3d4a5c;
  --color-muted: #f4f1ec;
  --color-white: #ffffff;
  --color-accent: #1a4d6e;
  --color-accent-light: #2a6f9e;
  --color-warm: #c4a574;
  --color-line: rgba(15, 20, 25, 0.08);
  /* システムフォントのみ（Google Fonts は日本語で多数の woff2 分割リクエストになり失敗しやすいため未使用） */
  --font-serif: "Hiragino Mincho ProN", "Yu Mincho", "YuMincho", "MS PMincho", "MS Mincho", serif;
  --font-sans: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Yu Gothic UI", "Meiryo", "MS PGothic", sans-serif;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --radius: 12px;
  --shadow: 0 12px 40px rgba(15, 20, 25, 0.08);
  --header-h: 72px;
}

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

html {
  scroll-behavior: smooth;
}

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-ink);
  background: var(--color-white);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  z-index: 1000;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-accent);
  color: var(--color-white);
  text-decoration: none;
  border-radius: var(--radius);
}

.skip-link:focus {
  left: var(--space-sm);
  top: var(--space-sm);
}

.container {
  width: min(1100px, 100% - 2 * var(--space-md));
  margin-inline: auto;
}

.container--narrow {
  width: min(720px, 100% - 2 * var(--space-md));
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-line);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-sm) var(--space-md);
  min-height: var(--header-h);
}

.site-header__end {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: auto;
}

.lang-switch {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  border: 1px solid var(--color-line);
  border-radius: 999px;
  padding: 2px;
  background: var(--color-white);
}

.lang-switch__btn {
  margin: 0;
  padding: 0.35rem 0.65rem;
  border: 0;
  border-radius: 999px;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--color-ink-soft);
  background: transparent;
  cursor: pointer;
  line-height: 1.2;
}

.lang-switch__btn:hover,
.lang-switch__btn:focus-visible {
  color: var(--color-accent);
}

.lang-switch__btn.is-active {
  background: var(--color-accent);
  color: var(--color-white);
}

.lang-switch__btn:focus-visible {
  outline: 2px solid var(--color-accent-light);
  outline-offset: 2px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: inherit;
}

.logo__mark {
  display: block;
  width: 40px;
  height: 40px;
  flex-shrink: 0;
}

.logo__mark--sm {
  width: 28px;
  height: 28px;
}

.logo__text {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
}

.logo__suffix {
  font-size: 0.72rem;
  font-weight: 500;
  margin-left: 0.25rem;
  opacity: 0.85;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  padding: 10px;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-ink);
  border-radius: 1px;
}

.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem 1.25rem;
}

.site-nav a {
  color: var(--color-ink-soft);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--color-accent);
}

.nav-cta {
  padding: 0.45rem 1rem;
  border-radius: 999px;
  background: var(--color-accent);
  color: var(--color-white) !important;
}

.nav-cta:hover,
.nav-cta:focus-visible {
  background: var(--color-accent-light);
  color: var(--color-white) !important;
}

@media (max-width: 960px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-line);
    padding: var(--space-md);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.25s ease, opacity 0.25s ease, visibility 0.25s;
  }

  .site-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .site-nav ul {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-sm);
  }
}

/* Hero */
.hero {
  position: relative;
  padding: clamp(3rem, 10vw, 5.5rem) 0 clamp(4rem, 12vw, 6rem);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 70% 0%, rgba(26, 77, 110, 0.12), transparent),
    radial-gradient(ellipse 60% 50% at 0% 100%, rgba(196, 165, 116, 0.15), transparent),
    linear-gradient(180deg, #faf8f5 0%, #ffffff 100%);
  z-index: 0;
}

.hero__content {
  position: relative;
  z-index: 1;
}

.hero__eyebrow {
  margin: 0 0 var(--space-sm);
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  font-weight: 700;
}

.hero__title {
  margin: 0 0 var(--space-md);
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 4vw, 2.65rem);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: 0.02em;
}

.hero__accent {
  color: var(--color-accent);
}

.hero__lead {
  margin: 0 0 var(--space-lg);
  max-width: 36em;
  color: var(--color-ink-soft);
  font-size: 1.05rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.35rem;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 999px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s, transform 0.15s;
}

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

.btn--primary {
  background: var(--color-accent);
  color: var(--color-white);
}

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

.btn--secondary {
  background: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.btn--secondary:hover {
  background: rgba(26, 77, 110, 0.06);
}

.btn--ghost {
  background: transparent;
  color: var(--color-ink-soft);
  border-color: var(--color-line);
}

.btn--ghost:hover {
  border-color: var(--color-ink-soft);
}

.btn--block {
  width: 100%;
}

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

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

.section--dark {
  background: linear-gradient(160deg, #0f2533 0%, #1a4d6e 45%, #153a52 100%);
  color: #e8eef2;
}

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

.section__head--light .section__title {
  color: var(--color-white);
}

.section__head--light .section__subtitle {
  color: rgba(232, 238, 242, 0.85);
}

.section__title {
  margin: 0 0 var(--space-xs);
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
}

.section__subtitle {
  margin: 0;
  color: var(--color-ink-soft);
  font-size: 0.95rem;
}

.section__subtitle.en {
  font-family: ui-sans-serif, system-ui, sans-serif;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.8rem;
}

html[lang="en"] .hero__eyebrow {
  text-transform: none;
  letter-spacing: 0.06em;
}

html[lang="en"] .section__subtitle.en {
  text-transform: none;
  font-family: var(--font-serif);
  letter-spacing: 0.06em;
}

/* Pillars */
.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

@media (max-width: 800px) {
  .pillars {
    grid-template-columns: 1fr;
  }
}

.pillar-card {
  position: relative;
  padding: var(--space-lg) var(--space-md);
  background: var(--color-white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--color-line);
}

.pillar-card__num {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 700;
  color: rgba(26, 77, 110, 0.1);
  line-height: 1;
}

.pillar-card__title {
  margin: 0 0 var(--space-sm);
  font-family: var(--font-serif);
  font-size: 1.2rem;
}

.pillar-card__text {
  margin: 0 0 var(--space-sm);
  color: var(--color-ink-soft);
  font-size: 0.95rem;
}

.pillar-card__text:last-child {
  margin-bottom: 0;
}

.pillar-card__link {
  display: inline-flex;
  align-items: center;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-accent);
  text-decoration: none;
}

.pillar-card__link:hover {
  text-decoration: underline;
}

/* Prose */
.prose p {
  margin: 0 0 var(--space-md);
}

.prose p:last-child {
  margin-bottom: 0;
}

/* Philosophy */
.philosophy-grid {
  display: grid;
  gap: var(--space-md);
  grid-template-columns: repeat(2, 1fr);
}

.philosophy-block--wide {
  grid-column: 1 / -1;
}

@media (max-width: 700px) {
  .philosophy-grid {
    grid-template-columns: 1fr;
  }

  .philosophy-block--wide {
    grid-column: auto;
  }
}

.philosophy-block {
  padding: var(--space-md);
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.philosophy-block__label {
  margin: 0 0 var(--space-xs);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0.85;
  font-weight: 700;
}

.philosophy-block__body {
  margin: 0;
  font-size: 1.02rem;
  line-height: 1.7;
}

.value-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-sm);
}

@media (min-width: 600px) {
  .value-list {
    grid-template-columns: 1fr 1fr;
  }
}

.value-list li {
  display: flex;
  gap: var(--space-sm);
  align-items: flex-start;
  font-size: 0.98rem;
}

.value-list__key {
  flex-shrink: 0;
  width: 1.75rem;
  height: 1.75rem;
  display: grid;
  place-items: center;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.15);
  font-weight: 700;
  font-size: 0.85rem;
}

/* Services */
.service-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.service-card {
  display: grid;
  gap: var(--space-md);
  padding: var(--space-lg);
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: calc(var(--radius) + 4px);
  box-shadow: var(--shadow);
}

@media (min-width: 768px) {
  .service-card {
    grid-template-columns: 1fr auto;
    align-items: end;
  }
}

.service-card__title {
  margin: 0 0 0.35rem;
  font-family: var(--font-serif);
  font-size: 1.35rem;
}

.service-card__tagline {
  margin: 0 0 var(--space-sm);
  font-weight: 700;
  color: var(--color-accent);
  font-size: 1rem;
}

.service-card__desc {
  margin: 0;
  color: var(--color-ink-soft);
}

.service-card__actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  min-width: min(100%, 260px);
}

.service-details {
  margin-bottom: var(--space-lg);
  padding: var(--space-md);
  background: var(--color-muted);
  border-radius: var(--radius);
  border-left: 4px solid var(--color-warm);
}

.service-details__title {
  margin: 0 0 var(--space-sm);
  font-family: var(--font-serif);
  font-size: 1.1rem;
}

.service-details p {
  margin: 0 0 var(--space-sm);
  color: var(--color-ink-soft);
  font-size: 0.95rem;
}

.text-link {
  color: var(--color-accent);
  font-weight: 600;
  text-decoration: none;
}

.text-link:hover {
  text-decoration: underline;
}

/* Profile */
.profile-table {
  margin: 0;
  max-width: 800px;
  margin-inline: auto;
}

.profile-row {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-line);
}

@media (max-width: 520px) {
  .profile-row {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }
}

.profile-row dt {
  margin: 0;
  font-weight: 700;
  color: var(--color-accent);
  font-size: 0.9rem;
}

.profile-row dd {
  margin: 0;
}

/* Messages */
.message-card {
  margin-bottom: var(--space-lg);
  padding: var(--space-lg);
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.message-card--accent {
  border-color: rgba(26, 77, 110, 0.2);
  background: linear-gradient(180deg, #f8fbfd 0%, #ffffff 100%);
}

.message-card__header {
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-line);
}

.message-card__header h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-serif);
  font-size: 1.2rem;
}

.message-card__sub {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-ink-soft);
}

.message-card__body {
  font-size: 0.98rem;
}

/* News */
.news-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.news-list li {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm) var(--space-md);
  align-items: baseline;
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-line);
}

.news-list__date {
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  color: var(--color-accent);
  font-size: 0.9rem;
}

.news-list__title {
  flex: 1;
  min-width: 200px;
}

/* Contact */
.section--contact {
  padding-bottom: calc(var(--space-xl) + 2rem);
}

.contact-lead {
  margin: 0 0 var(--space-sm);
  color: var(--color-ink-soft);
}

.contact-fallback {
  margin: 0 0 var(--space-lg);
  color: var(--color-ink-soft);
  font-size: 0.78rem;
  line-height: 1.65;
  opacity: 0.72;
  font-weight: 400;
}

.contact-fallback a {
  color: var(--color-accent);
  font-weight: 500;
  opacity: 1;
  word-break: break-all;
}

.contact-fallback a:hover,
.contact-fallback a:focus-visible {
  color: var(--color-accent-light);
}

.contact-form .field {
  margin-bottom: var(--space-md);
}

.contact-form label {
  display: block;
  margin-bottom: 0.35rem;
  font-weight: 600;
  font-size: 0.9rem;
}

.req {
  color: #b33;
  font-size: 0.8rem;
  font-weight: 700;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.65rem 0.85rem;
  font: inherit;
  border: 1px solid var(--color-line);
  border-radius: 8px;
  background: var(--color-white);
}

.contact-form textarea {
  resize: none;
}

.contact-form input:focus-visible,
.contact-form textarea:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
  border-color: var(--color-accent);
}

.form-status {
  min-height: 1.5rem;
  margin: 0 0 var(--space-sm);
  font-size: 0.9rem;
  color: var(--color-accent);
}

.form-status.is-error {
  color: #a22;
}

/* Footer */
.site-footer {
  padding: var(--space-lg) 0;
  background: var(--color-ink);
  color: rgba(255, 255, 255, 0.85);
}

.site-footer__inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.site-footer__top {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: var(--space-md) var(--space-lg);
  width: 100%;
}

.site-footer__brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-serif);
  font-weight: 600;
  flex-shrink: 0;
}

.site-footer__nav {
  min-width: 0;
}

.site-footer__nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1rem;
  width: 100%;
}

.site-footer__nav li {
  flex: 0 0 auto;
}

.site-footer__nav a {
  color: rgba(255, 255, 255, 0.82);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
  white-space: nowrap;
}

.site-footer__nav a:hover,
.site-footer__nav a:focus-visible {
  color: var(--color-warm);
}

.site-footer__copy {
  margin: 0;
  padding-top: var(--space-md);
  width: 100%;
  text-align: center;
  align-self: stretch;
  font-size: 0.88rem;
  opacity: 0.88;
}

.site-footer__copy-main {
  display: block;
}

.site-footer__copy-sub {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.72rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  opacity: 0.62;
}

@media (max-width: 900px) {
  .site-footer__top {
    grid-template-columns: 1fr;
  }

  .site-footer__nav ul {
    flex-wrap: wrap;
    justify-content: flex-start;
  }
}

/* Back to top */
.scroll-top {
  position: fixed;
  right: max(1rem, env(safe-area-inset-right, 0px));
  bottom: max(1.25rem, env(safe-area-inset-bottom, 0px));
  z-index: 90;
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: #0c3554;
  color: #ffffff;
  text-decoration: none;
  box-shadow: 0 4px 18px rgba(12, 53, 84, 0.45);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  pointer-events: none;
  transition:
    opacity 0.25s ease,
    visibility 0.25s ease,
    transform 0.25s ease,
    background 0.2s ease,
    box-shadow 0.2s ease;
}

.scroll-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

.scroll-top:hover,
.scroll-top:focus-visible {
  background: #082a44;
  box-shadow: 0 6px 22px rgba(8, 42, 68, 0.55);
}

.scroll-top:focus-visible {
  outline: 2px solid #ffffff;
  outline-offset: 3px;
}

.scroll-top__icon {
  display: block;
}

@media (prefers-reduced-motion: reduce) {
  .scroll-top {
    transition: none;
  }
}