/* ハーレー部 H.C.C — open-air touring club
   Navy #0f172a / Slate #1e293b / White #ffffff / Mist #f8fafc / Gold #f59e0b */

:root {
  --navy: #0f172a;
  --slate: #1e293b;
  --white: #ffffff;
  --mist: #f8fafc;
  --line: #e2e8f0;
  --gold: #f59e0b;
  --gold-deep: #d97706;
  --ink: #0f172a;
  --muted: #475569;
  --header-h: 72px;
  --gutter: 22px;
  --max: 1080px;
  --font: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", sans-serif;
  --display: "Outfit", "Noto Sans JP", sans-serif;
  --radius: 18px;
}

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

html {
  background: var(--white);
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
  scroll-padding-bottom: 90px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--white);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.85;
  padding-bottom: 90px;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  border: 0;
}

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
}

h1,
h2,
h3,
p,
ul,
figure {
  margin: 0;
}

ul {
  padding: 0;
  list-style: none;
}

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

::selection {
  background: var(--gold);
  color: var(--navy);
}

.skip {
  position: fixed;
  left: 12px;
  top: -48px;
  z-index: 80;
  padding: 8px 12px;
  background: var(--gold);
  color: var(--navy);
  font-weight: 700;
}

.skip:focus {
  top: 12px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.wrap {
  width: min(var(--max), calc(100% - (var(--gutter) * 2)));
  margin-inline: auto;
}

.eyebrow {
  display: block;
  margin-bottom: 10px;
  font-family: var(--display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--gold-deep);
}

h1,
h2,
.card h3,
.contact h2 {
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.45;
}

h1 {
  font-size: clamp(1.42rem, 6vw, 2.45rem);
  color: var(--navy);
}

h2 {
  font-size: clamp(1.45rem, 4.6vw, 2.15rem);
  color: var(--navy);
}

.lead {
  max-width: 36em;
  margin-top: 12px;
  color: var(--muted);
}

.section {
  padding: 72px 0;
}

.prose p + p {
  margin-top: 1.05em;
}

.prose {
  margin-top: 18px;
  color: var(--slate);
}

/* Header */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 60;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  padding: 0 14px 0 16px;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.brand {
  font-family: var(--display);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  line-height: 1;
  color: var(--navy);
}

.nav-toggle {
  position: relative;
  width: 44px;
  height: 44px;
  cursor: pointer;
}

.nav-toggle span {
  position: absolute;
  left: 11px;
  width: 22px;
  height: 2px;
  background: var(--navy);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.2s ease, top 0.25s ease;
}

.nav-toggle span:nth-child(1) { top: 16px; }
.nav-toggle span:nth-child(2) { top: 22px; }
.nav-toggle span:nth-child(3) { top: 28px; }

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  top: 22px;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  top: 22px;
  transform: rotate(-45deg);
}

.nav {
  position: fixed;
  inset: 0;
  z-index: 55;
  display: flex;
  align-items: center;
  padding: 96px 28px 110px;
  background: var(--white);
  overflow: hidden;
  transform: translate3d(100%, 0, 0);
  visibility: hidden;
  pointer-events: none;
  transition: transform 0.35s ease, visibility 0.35s;
}

.nav.is-open {
  transform: none;
  visibility: visible;
  pointer-events: auto;
}

.nav__list {
  width: min(480px, 100%);
}

.nav a {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  column-gap: 8px;
  align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.nav__no {
  grid-row: 1 / span 2;
  font-family: var(--display);
  font-weight: 600;
  color: var(--gold-deep);
}

.nav__en {
  font-family: var(--display);
  font-size: clamp(1.7rem, 7vw, 2.6rem);
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1;
  color: var(--navy);
}

.nav__ja {
  color: var(--muted);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
}

body.is-nav-open {
  overflow: hidden;
}

body.is-nav-open .dock {
  visibility: hidden;
}

/* Hero */

.hero {
  position: relative;
  isolation: isolate;
  padding: calc(var(--header-h) + 16px) 0 12px;
  background: #0b1220;
  color: #ffffff;
}

.hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(0, 0, 0, 0.35) 0%, rgba(0, 0, 0, 0.5) 100%),
    url("https://images.unsplash.com/photo-1469854523086-cc02fe5d8800?auto=format&fit=crop&w=1600&q=80") center 42% / cover no-repeat;
}

.hero h1,
.hero__club {
  color: #ffffff;
}

.hero .eyebrow,
.hero__club span {
  color: var(--gold);
}

.hero__mark {
  width: 136px;
  height: 136px;
  margin: 0 auto 10px;
  border-radius: 50%;
  overflow: hidden;
  background: #ffffff;
}

.hero__mark img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: cover;
  object-position: center;
  filter: grayscale(100%);
  transform: scale(1.08);
}

.hero__copy {
  text-align: center;
}

.hero__club {
  margin-top: 14px;
  font-family: var(--display);
  font-size: clamp(0.72rem, 3.1vw, 0.95rem);
  font-weight: 500;
  letter-spacing: 0.08em;
  color: #ffffff;
}

.hero__club span {
  color: var(--gold);
}

.hero__actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 16px;
}

.hero__photo {
  margin-top: 20px;
}

.hero__photo img,
.message img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.hero__photo img {
  border-radius: 22px;
  object-position: center 42%;
  box-shadow: 0 14px 32px rgba(15, 23, 42, 0.08);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 20px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  line-height: 1.3;
  text-align: center;
}

.hero__actions .btn,
.contact .btn {
  width: 100%;
}

.btn--primary {
  background: var(--gold);
  color: var(--navy);
}

.btn--ghost {
  background: var(--white);
  color: var(--navy);
  border-color: #cbd5e1;
}

/* About */

.about {
  background: var(--mist);
}

.section.about {
  padding-top: 32px;
}

.about__story {
  display: grid;
  gap: 22px;
}

.message {
  min-width: 0;
  margin: 4px 0;
}

.message img {
  border-radius: 18px;
  object-position: center 48%;
}

.message figcaption {
  margin-top: 14px;
  padding-left: 14px;
  border-left: 3px solid var(--gold);
}

.message__who {
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--navy);
}

.message figcaption p:last-child {
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.95rem;
}

/* Activity */

.activity {
  background: var(--white);
}

.faq__grid {
  display: grid;
  gap: 28px;
}

.card-list {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.card {
  min-width: 0;
  padding: 18px 20px 22px;
  background: var(--mist);
  border: 0;
  border-top: 3px solid var(--gold);
  border-radius: 0 0 16px 16px;
}

.card:nth-child(2) {
  background: var(--white);
  border-top-color: var(--navy);
  box-shadow: inset 0 0 0 1px var(--line);
}

.card__no {
  font-family: var(--display);
  font-size: clamp(2rem, 8vw, 2.5rem);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: 0.04em;
  color: var(--gold);
}

.card:nth-child(2) .card__no {
  color: var(--navy);
}

.card h3 {
  margin-top: 8px;
  font-size: 1.15rem;
}

.card h3 span {
  display: block;
  margin-bottom: 4px;
  font-family: var(--display);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--navy);
}

.card p:last-child {
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.95rem;
}

/* Media */

.media {
  background: var(--mist);
  padding: 48px 0;
}

.media h2 {
  font-size: clamp(1.2rem, 4.4vw, 1.75rem);
}

.media__nl {
  display: inline;
}

.sns {
  display: grid;
  gap: 10px;
  margin-top: 20px;
}

.sns__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  min-width: 0;
  min-height: 72px;
  padding: 12px 14px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 16px;
  color: var(--navy);
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.sns__icon {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  flex: none;
}

.sns__icon svg {
  display: block;
}

.sns__body {
  min-width: 0;
}

.sns__name {
  display: block;
  font-size: 0.92rem;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: 0.01em;
}

.sns__cta {
  display: block;
  margin-top: 1px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 500;
  line-height: 1.4;
}

.sns__go {
  display: grid;
  place-items: center;
  color: #94a3b8;
  transition: transform 0.18s ease, color 0.18s ease;
}

.sns__link:active {
  transform: scale(0.985);
  background: #f1f5f9;
}

/* FAQ / contact */

.faq {
  background: var(--mist);
}

.faq__list {
  margin-top: 8px;
}

.faq details {
  border-bottom: 1px solid #cbd5e1;
}

.faq summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 58px;
  padding: 16px 0;
  cursor: pointer;
  font-weight: 700;
  line-height: 1.55;
  list-style: none;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq__icon {
  flex: none;
  width: 1.4rem;
  font-family: var(--display);
  font-size: 1.4rem;
  line-height: 1;
  text-align: center;
  color: var(--gold-deep);
}

.faq__icon::before {
  content: "+";
}

.faq details[open] .faq__icon::before {
  content: "−";
}

.faq details p {
  padding: 0 0 18px;
  color: var(--muted);
  font-weight: 400;
}

.contact {
  margin-bottom: 8px;
  padding: 28px 22px 26px;
  background: var(--navy);
  border-radius: 22px;
  color: var(--white);
  scroll-margin-bottom: 120px;
}

.contact h2 {
  color: var(--white);
  font-size: clamp(1.28rem, 4.8vw, 1.7rem);
  line-height: 1.4;
  text-wrap: balance;
}

.contact p {
  margin-top: 12px;
  color: #cbd5e1;
}

.contact .btn {
  margin-top: 20px;
  background: var(--white);
  color: var(--navy);
}

.contact__note {
  margin-top: 12px;
  font-size: 0.88rem;
  color: #94a3b8;
}

.keep {
  white-space: nowrap;
}

/* Footer */

.site-footer {
  padding: 56px 0 28px;
  text-align: center;
  background: var(--navy);
  color: #e2e8f0;
}

.site-footer__logo {
  display: block;
  width: min(280px, 76%);
  height: auto;
  margin-inline: auto;
  mix-blend-mode: screen;
}

.site-footer__name,
.footer-nav {
  font-family: var(--display);
  letter-spacing: 0.12em;
}

.site-footer__name {
  margin-top: 8px;
  font-size: 0.78rem;
  color: #cbd5e1;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 16px;
  margin-top: 22px;
  font-size: 0.78rem;
}

.copy {
  margin-top: 22px;
  color: #94a3b8;
  font-family: var(--display);
  font-size: 0.75rem;
  letter-spacing: 0.03em;
}

/* Dock */

.dock {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 40;
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  height: 72px;
  background: var(--white);
  border-top: 1px solid var(--line);
  box-shadow: 0 -8px 24px rgba(15, 23, 42, 0.06);
}

.dock a {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.dock__ig {
  font-family: var(--display);
  color: var(--navy);
}

.dock__go {
  margin: 10px 12px 10px 0;
  border-radius: 999px;
  background: var(--gold);
  color: var(--navy);
}

@media (max-width: 767px) {
  .media__nl {
    display: block;
  }
}

@media (hover: hover) {
  .btn--primary:hover,
  .dock__go:hover {
    background: #fbbf24;
  }

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

  .sns__link:hover {
    transform: translateY(-2px);
    border-color: #cbd5e1;
    box-shadow: 0 10px 24px rgba(15, 23, 42, 0.08);
  }

  .sns__link:hover .sns__go {
    transform: translateX(3px);
    color: var(--navy);
  }

  .contact .btn:hover {
    background: #f8fafc;
  }

  .nav__en:hover {
    color: var(--gold-deep);
  }
}

@media (min-width: 768px) {
  :root {
    --gutter: 32px;
  }

  .section {
    padding: 96px 0;
  }

  .hero__actions,
  .contact .btn {
    width: auto;
  }

  .hero__actions {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
  }

  .hero__actions .btn,
  .contact .btn {
    width: auto;
  }

  .section.about {
    padding-top: 64px;
  }

  .media {
    padding: 72px 0;
  }

  .sns {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 14px;
  }
}

@media (min-width: 1024px) {
  .hero__grid {
    display: grid;
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    gap: 48px;
    align-items: center;
  }

  .hero__copy {
    text-align: left;
  }

  .hero__mark {
    width: 168px;
    height: 168px;
    margin: 0 0 16px;
  }

  .hero__actions {
    justify-content: flex-start;
  }

  .hero__photo {
    margin-top: 0;
  }

  .about__story {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    grid-template-areas:
      "lead photo"
      "more photo";
    gap: 20px 48px;
    align-items: center;
  }

  .about__lead {
    grid-area: lead;
  }

  .message {
    grid-area: photo;
    margin: 0;
  }

  .about__more {
    grid-area: more;
  }

  .card-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .faq__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
    gap: 36px;
    align-items: start;
  }
}

@media (min-width: 1280px) {
  :root {
    --gutter: 40px;
  }

  .hero__mark {
    width: 180px;
    height: 180px;
  }
}

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

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}