/* ==========================================================================
   jp site — base styles (skeleton)
   Palette: white bg, near-black text, warm beige accents
   ========================================================================== */

:root {
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-muted: #8a7b68;
  --color-cream: #efe9de;
  --font-serif-jp: "Noto Serif JP", "Hiragino Mincho ProN", serif;
  --font-hand: "Caveat", cursive;
  --container-width: 1080px;
  --ease-out-quint: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-serif-jp);
  font-size: 16px;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
}

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

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

ul {
  list-style: none;
}

/* ---------- Header ---------- */

.header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-cream);
}

.header__inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.header__left {
  display: flex;
  align-items: center;
  gap: 20px;
}

.sns-list {
  height: 22px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.sns-list li {
  display: flex;
  align-items: center;
}

.sns-list a {
  display: inline-flex;
  align-items: center;
  line-height: 1;
}

.sns-list svg {
  display: block;
  width: 22px;
  height: 22px;
  transition: transform 0.25s var(--ease-out-quint);
}

.sns-list a:hover svg {
  transform: scale(1.1);
}

.logo {
  display: flex;
  align-items: center;
}

.logo__img {
  height: 44px;
  width: auto;
  object-fit: contain;
}

.nav-list {
  display: flex;
  gap: 32px;
}

.nav-list a {
  position: relative;
  font-size: 14px;
  letter-spacing: 0.08em;
}

/* Underline grows in from the left on hover */
.nav-list a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -4px;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.3s var(--ease-out-quint);
}

.nav-list a:hover::after,
.nav-list a:focus-visible::after {
  transform: scaleX(1);
}

/* Burger toggle (mobile only) */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: none;
  border: 0;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--color-text);
  border-radius: 1px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.nav-toggle.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Hero ---------- */

.hero {
  padding: 40px 24px 0;
}

.hero__image {
  max-width: 960px;
  margin: 0 auto;
  overflow: hidden;
}

.hero__image img {
  width: 100%;
  object-fit: cover;
}

.hero__tags {
  margin-top: 28px;
  text-align: center;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.04em;
}

/* ---------- Sections (shared) ---------- */

.section {
  padding: 96px 24px;
}

.section + .section {
  border-top: 1px solid var(--color-cream);
}

.section__inner {
  max-width: var(--container-width);
  margin: 0 auto;
}

.section__heading {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-align: center;
  margin-bottom: 48px;
}

.lead {
  font-size: 18px;
  margin-bottom: 16px;
}

.en-text {
  font-size: 14px;
  color: var(--color-muted);
}

/* ---------- Split layout (text left / media right) ---------- */

.split {
  display: grid;
  grid-template-columns: 55% 1fr;
  gap: 48px;
  align-items: center;
}

.about-list li {
  position: relative;
  padding-left: 1.2em;
}

.about-list li::before {
  content: "・";
  position: absolute;
  left: 0;
}

/* ---------- Photos ---------- */

.photo {
  overflow: hidden;
  border-radius: 8px;
}

.photo img {
  width: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease-out-quint);
}

.photo:hover img {
  transform: scale(1.03);
}

.photo--center {
  max-width: 640px;
  margin: 0 auto 48px;
}

/* ---------- YouTube embed (16:9) ---------- */

.video {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 8px;
  overflow: hidden;
  background: #000;
}

.video iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* YouTube channel card (ABOUT 詳細) */
.channel-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 40px 24px;
  border: 1px solid var(--color-cream);
  border-radius: 8px;
  background: var(--color-cream);
  text-align: center;
  transition: background-color 0.25s ease, color 0.25s ease,
    transform 0.25s var(--ease-out-quint);
}

.channel-card:hover {
  background: var(--color-text);
  color: var(--color-bg);
  transform: translateY(-2px);
}

.channel-card:hover {
  background: var(--color-text);
  color: var(--color-bg);
}

.channel-card__icon svg {
  width: 56px;
  height: 56px;
}

.channel-card__name {
  font-weight: 700;
  font-size: 17px;
}

.channel-card__action {
  font-size: 13px;
  letter-spacing: 0.1em;
  text-decoration: underline;
  text-underline-offset: 0.3em;
}

/* ---------- Timeline (profile) ---------- */

.timeline {
  margin: 24px 0;
  max-width: 72ch;
}

.timeline__row {
  display: grid;
  grid-template-columns: 8.5em 1fr;
  gap: 16px;
  padding: 8px 0;
}

.timeline__row dt {
  font-weight: 700;
}

/* ---------- Content blocks ---------- */

.content-block {
  margin-top: 56px;
}

.content-block:first-of-type {
  margin-top: 0;
}

.sub-heading {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 24px;
}

.check-heading {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 16px;
}

/* ---------- Links & buttons ---------- */

.text-link {
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.btn {
  display: inline-block;
  margin-top: 16px;
  padding: 12px 32px;
  border: 1px solid var(--color-text);
  border-radius: 999px;
  font-size: 15px;
  letter-spacing: 0.06em;
  transition: background-color 0.25s ease, color 0.25s ease,
    transform 0.25s var(--ease-out-quint);
}

.btn:hover {
  background: var(--color-text);
  color: var(--color-bg);
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

.more-link {
  margin-top: 48px;
  text-align: center;
}

.more-link a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  letter-spacing: 0.1em;
  color: var(--color-muted);
  transition: color 0.2s ease;
}

.more-link a:hover {
  color: var(--color-text);
}

.more-link i {
  font-style: normal;
  transition: transform 0.25s var(--ease-out-quint);
}

.more-link a:hover i {
  transform: translateX(4px);
}

/* ---------- Detail (sub) pages ---------- */

.page {
  padding: 72px 24px 96px;
}

.page__inner {
  max-width: var(--container-width);
  margin: 0 auto;
}

.page__inner > p {
  max-width: 72ch;
}

.page__eyebrow {
  font-size: 14px;
  letter-spacing: 0.2em;
  color: var(--color-muted);
  text-align: center;
  margin-bottom: 8px;
}

.page__title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-align: center;
  margin-bottom: 48px;
}

.page .check-heading {
  font-size: 22px;
}

.back-link {
  margin-top: 72px;
  padding-top: 40px;
  border-top: 1px dashed var(--color-cream);
}

.back-link a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  letter-spacing: 0.1em;
  color: var(--color-muted);
  transition: color 0.2s ease;
}

.back-link a:hover {
  color: var(--color-text);
}

.back-link i {
  font-style: normal;
  transition: transform 0.25s var(--ease-out-quint);
}

.back-link a:hover i {
  transform: translateX(-4px);
}

/* ---------- Footer ---------- */

.footer {
  border-top: 1px solid var(--color-cream);
  padding: 48px 24px 32px;
}

.footer__inner {
  max-width: var(--container-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.logo--footer .logo__img {
  height: 36px;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
}

.footer-nav a {
  font-size: 13px;
  letter-spacing: 0.08em;
}

.sns-list--footer {
  height: auto;
  gap: 16px;
}

.footer__copy {
  margin-top: 32px;
  text-align: center;
  color: var(--color-muted);
}

/* ---------- Responsive ---------- */

@media (max-width: 860px) {
  .split {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .timeline__row {
    grid-template-columns: 1fr;
    gap: 0;
  }

  /* Header: single row (SNS + logo left, burger right), nav in dropdown */
  .header__inner {
    flex-wrap: nowrap;
    justify-content: space-between;
    padding: 10px 16px;
  }

  .header__left {
    gap: 16px;
  }

  .nav-toggle {
    display: flex;
  }

  .header__nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-cream);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.25s var(--ease-out-quint),
      transform 0.25s var(--ease-out-quint), visibility 0.25s;
  }

  .header__nav.is-open {
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: 0 12px 24px rgba(26, 26, 26, 0.08);
  }

  .nav-list {
    flex-direction: column;
    gap: 0;
    padding: 8px 0;
  }

  .nav-list a {
    display: block;
    padding: 12px 24px;
    font-size: 14px;
    text-align: center;
  }

  /* Footer: stack and center everything */
  .footer__inner {
    flex-direction: column;
    gap: 24px;
  }
}

@media (max-width: 560px) {
  .section {
    padding: 64px 20px;
  }

  .logo__img {
    height: 36px;
  }

  .sns-list {
    gap: 10px;
  }

  .sns-list svg {
    width: 20px;
    height: 20px;
  }

  .footer {
    padding: 40px 16px 24px;
  }

  .footer-nav {
    flex-direction: column;
    gap: 10px;
  }
}

/* ---------- Reduced motion ---------- */

@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;
  }
}