:root {
  --bg: #f7f3ee;
  --paper: #fffdf9;
  --ink: #111111;
  --muted: #69615b;
  --line: #1d1a1820;
  --red: #d71920;
  --deep-red: #8f1117;
  --black: #111111;
  --soft: #eee6dd;
  --shadow: 0 24px 60px rgba(17, 17, 17, 0.12);
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 92% 6%, rgba(215, 25, 32, 0.09), transparent 26rem),
    linear-gradient(180deg, #fffdf9 0%, var(--bg) 42%, #fffdf9 100%);
  color: var(--ink);
  font-family:
    "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", "YuGothic", Meiryo,
    system-ui, sans-serif;
  font-size: 18px;
  line-height: 1.8;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px clamp(20px, 4vw, 56px);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 253, 249, 0.86);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: 0;
}

.brand img {
  display: block;
}

.brand-logo {
  display: block;
  height: 56px;
  width: auto;
}

.hero-mascot {
  display: block;
  width: 100%;
  max-width: 360px;
  height: auto;
  margin: 0 auto;
  filter: drop-shadow(0 26px 44px rgba(17, 17, 17, 0.22));
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.4vw, 28px);
  color: var(--muted);
  font-size: 16px;
  font-weight: 700;
}

.site-nav a:hover {
  color: var(--red);
}

.section-shell {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: clamp(64px, 9vw, 120px) 0;
}

.hero {
  min-height: calc(100svh - 72px);
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.72fr);
  align-items: center;
  gap: clamp(36px, 6vw, 84px);
  padding-top: clamp(56px, 7vw, 92px);
}

.eyebrow,
.section-kicker {
  color: var(--red);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.eyebrow {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 18px;
}

.eyebrow span {
  border-radius: 6px;
  padding: 3px 10px;
  color: var(--muted);
  background: rgba(17, 17, 17, 0.05);
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 9em;
  margin-bottom: 16px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(58px, 10vw, 132px);
  font-weight: 900;
  line-height: 0.9;
  letter-spacing: 0;
}

.hero-logo-title {
  max-width: none;
  margin-bottom: 18px;
}

.hero-logo {
  display: block;
  width: 100%;
  max-width: 640px;
  height: auto;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(30px, 4.4vw, 56px);
  line-height: 1.18;
  letter-spacing: 0;
  text-wrap: balance;
  word-break: auto-phrase;
}

h3 {
  margin-bottom: 10px;
  font-size: 25px;
  line-height: 1.35;
}

.catch {
  margin-bottom: 18px;
  font-size: clamp(24px, 3.6vw, 42px);
  font-weight: 900;
  line-height: 1.3;
  text-wrap: balance;
  word-break: auto-phrase;
}

.lead {
  max-width: 700px;
  color: var(--muted);
  font-size: clamp(18px, 2.3vw, 22px);
}

.hero-actions,
.join-actions,
.event-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-actions {
  margin-top: 32px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--black);
  border-radius: 999px;
  padding: 13px 24px;
  font-size: 16px;
  font-weight: 900;
  transition:
    transform 180ms ease,
    background 180ms ease,
    color 180ms ease,
    border-color 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

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

.button.secondary {
  background: rgba(255, 255, 255, 0.72);
}

.button.secondary:hover {
  border-color: var(--red);
  color: var(--red);
}

.hero-visual {
  display: grid;
  place-items: center;
  min-height: 470px;
}

.card-stack {
  position: relative;
  width: min(360px, 78vw);
  aspect-ratio: 0.72;
}

.playing-card {
  position: absolute;
  inset: 0;
  border: 2px solid var(--black);
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.card-front {
  z-index: 2;
  display: grid;
  grid-template-rows: auto 1fr auto auto auto;
  padding: 28px;
  background:
    linear-gradient(135deg, transparent 0 48%, rgba(215, 25, 32, 0.14) 48% 52%, transparent 52%),
    var(--paper);
  transform: rotate(-4deg);
}

.card-back {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  place-items: center;
  color: #fff;
  background:
    linear-gradient(45deg, rgba(255, 255, 255, 0.08) 25%, transparent 25% 50%, rgba(255, 255, 255, 0.08) 50% 75%, transparent 75%),
    var(--black);
  background-size: 28px 28px;
  font-size: 62px;
  transform: rotate(8deg) translate(28px, 22px);
}

.suit {
  color: var(--red);
  font-size: 40px;
  line-height: 1;
}

.suit.bottom {
  justify-self: end;
  align-self: end;
  transform: rotate(180deg);
}

.card-title {
  align-self: end;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(54px, 9vw, 82px);
  font-weight: 900;
  line-height: 1;
}

.card-line {
  display: block;
  width: 100%;
  height: 2px;
  margin: 22px 0 18px;
  background: var(--black);
}

.card-word {
  font-size: 18px;
  font-weight: 900;
}

.card-word.muted {
  color: var(--muted);
}

.section-grid {
  display: grid;
  grid-template-columns: minmax(220px, 0.78fr) minmax(0, 1.22fr);
  gap: clamp(28px, 6vw, 78px);
}

.body-copy {
  color: var(--muted);
  font-size: clamp(17px, 2.1vw, 20px);
}

.body-copy p:last-child,
.section-heading p:last-child,
.join-panel p:last-child {
  margin-bottom: 0;
}

.section-heading {
  margin-bottom: 40px;
}

.section-heading h2 {
  margin-bottom: 16px;
}

.section-heading p {
  max-width: 680px;
  color: var(--muted);
  font-size: 19px;
}

.card-grid {
  display: grid;
  gap: 16px;
}

.concept-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.info-card,
.event-card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 253, 249, 0.84);
}

.info-card {
  min-height: 230px;
  padding: 26px;
}

.info-card::after {
  content: attr(data-suit);
  position: absolute;
  right: 20px;
  bottom: -20px;
  color: rgba(215, 25, 32, 0.11);
  font-size: 120px;
  line-height: 1;
}

.info-card .label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  margin-bottom: 28px;
  border-radius: 50%;
  background: var(--black);
  color: #fff;
  font-size: 24px;
}

.info-card p {
  color: var(--muted);
}

.event-list {
  display: grid;
  gap: 18px;
}

.event-card {
  display: block;
  padding: 0;
  overflow: hidden;
}

.event-cover {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-bottom: 1px solid var(--line);
}

.event-body {
  padding: clamp(22px, 4vw, 36px);
}

.pill-number {
  color: var(--muted);
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 900;
}

.event-card-next .pill-number {
  border-color: rgba(215, 25, 32, 0.28);
  background: rgba(215, 25, 32, 0.1);
  color: var(--deep-red);
}

.event-number {
  display: grid;
  place-items: center;
  align-self: start;
  aspect-ratio: 1;
  border: 2px solid var(--black);
  border-radius: 8px;
  background: var(--paper);
  color: var(--red);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 48px;
  font-weight: 900;
  line-height: 1;
}

.event-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
}

.pill {
  border: 1px solid rgba(17, 17, 17, 0.16);
  border-radius: 999px;
  padding: 4px 11px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.event-card p {
  color: var(--muted);
}

.pill-next {
  border-color: rgba(215, 25, 32, 0.28);
  color: var(--deep-red);
  background: rgba(215, 25, 32, 0.1);
}

.event-card-next {
  border-color: var(--red);
  box-shadow: 0 0 0 1px var(--red) inset;
}

.event-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0 4px;
}

.event-recap {
  margin: 18px 0 4px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--red);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.5);
}

.event-recap.is-empty {
  border-left-color: rgba(215, 25, 32, 0.3);
  background: transparent;
}

.recap-label {
  display: inline-block;
  margin-bottom: 6px;
  color: var(--deep-red);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.event-recap p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 15px;
}

.event-recap p.muted {
  color: rgba(105, 97, 91, 0.7);
}

.recap-link {
  display: inline-block;
  margin-top: 8px;
  color: var(--red);
  font-weight: 800;
  font-size: 14px;
}

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

.tag {
  border-radius: 6px;
  padding: 3px 10px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  background: rgba(17, 17, 17, 0.05);
}

.member-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.member-card {
  min-height: 0;
}

.member-card .label {
  background: var(--red);
}

.member-top {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 18px;
}

.member-avatar {
  position: relative;
  flex: none;
  display: inline-block;
  width: 108px;
  height: 108px;
}

.member-avatar img {
  width: 108px;
  height: 108px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--paper);
  box-shadow: 0 0 0 1px var(--line), 0 10px 24px rgba(17, 17, 17, 0.12);
  background: #fff;
}

.member-suit {
  position: absolute;
  right: 0;
  bottom: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--red);
  color: #fff;
  font-size: 17px;
  border: 3px solid var(--paper);
}

.member-head {
  min-width: 0;
}

.member-head h3 {
  margin: 0 0 4px;
}

.member-realname {
  margin-left: 8px;
  color: var(--muted);
  font-size: 15px;
  font-weight: 700;
}

.member-title {
  display: block;
  color: var(--red);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.member-note {
  margin-bottom: 14px;
  color: var(--ink);
  font-size: 17px;
}

.member-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 16px;
  padding: 0;
  list-style: none;
}

.member-tags li {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 12px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

/* 過去イベント：スクエアサムネを横に並べる */
.past-events {
  margin-top: 28px;
}

.past-heading {
  margin: 0 0 16px;
  font-size: 18px;
  font-weight: 900;
}

.past-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.past-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 253, 249, 0.84);
}

.past-thumb-link {
  display: block;
}

.past-thumb {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  background: #fff;
  border-bottom: 1px solid var(--line);
  transition: transform 240ms ease;
}

.past-thumb-link:hover .past-thumb {
  transform: scale(1.02);
}

.past-info {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 16px 18px 18px;
}

.past-title {
  margin: 0;
  font-size: 19px;
  line-height: 1.4;
}

.mokumoku-price {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  font-weight: 700;
}

.mokumoku-card .event-actions {
  margin-top: 4px;
}

.past-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin-top: 2px;
}

.past-report-row {
  padding-top: 10px;
  border-top: 1px solid var(--line);
}

.past-link,
.past-report {
  color: var(--red);
  font-size: 15px;
  font-weight: 800;
}

.past-report.is-empty {
  color: rgba(105, 97, 91, 0.7);
  font-weight: 700;
}

.past-link:hover,
a.past-report:hover {
  text-decoration: underline;
}

.member-links {
  display: flex;
  gap: 8px;
  margin-top: 14px;
}

.member-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 34px;
  height: 34px;
  padding: 0 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink);
  font-size: 14px;
  font-weight: 800;
  background: rgba(255, 255, 255, 0.72);
  transition:
    border-color 160ms ease,
    color 160ms ease,
    transform 160ms ease;
}

.member-link:hover {
  border-color: var(--red);
  color: var(--red);
  transform: translateY(-2px);
}

.join-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: center;
  border: 2px solid var(--black);
  border-radius: 8px;
  padding: clamp(26px, 5vw, 54px);
  background:
    linear-gradient(135deg, transparent 0 62%, rgba(215, 25, 32, 0.10) 62%),
    var(--paper);
  box-shadow: var(--shadow);
}

.join-panel p {
  max-width: 680px;
  color: var(--muted);
}

.join-actions {
  justify-content: flex-end;
  max-width: 310px;
}

.join-actions .button {
  width: 100%;
}

/* AI活用レベル */
.stage-figure {
  margin: 0 0 28px;
}

.stage-image {
  display: block;
  width: 100%;
  max-width: 860px;
  height: auto;
  margin: 0 auto;
  border: 1px solid var(--line);
  border-radius: 12px;
}

.stage-figure figcaption {
  margin-top: 10px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  text-align: center;
}

.stage-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.stage-card {
  position: relative;
  overflow: hidden;
  padding: 26px 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 253, 249, 0.84);
}

.stage-step {
  display: block;
  margin-bottom: 14px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 40px;
  font-weight: 900;
  line-height: 1;
  color: var(--red);
}

.stage-card p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 15px;
}

/* 実績の数字バンド */
.stats-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 22px;
}

.stat {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.5);
  text-align: center;
}

.stat-value {
  display: block;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(34px, 5vw, 52px);
  font-weight: 900;
  line-height: 1;
  color: var(--ink);
}

.stat-unit {
  margin-left: 4px;
  font-family:
    "Hiragino Sans", system-ui, sans-serif;
  font-size: 18px;
  font-weight: 900;
  color: var(--muted);
}

.stat-label {
  display: block;
  margin-top: 10px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

/* こんな方におすすめ */
.audience-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 28px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.audience-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  font-size: 18px;
}

.audience-mark {
  color: var(--red);
  font-size: 16px;
  line-height: 1.6;
}

/* FAQ */
.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 253, 249, 0.84);
}

.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 20px 24px;
  font-size: 19px;
  font-weight: 800;
}

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

.faq-item summary::after {
  content: "＋";
  float: right;
  color: var(--red);
  font-weight: 900;
}

.faq-item[open] summary::after {
  content: "－";
}

.faq-item p {
  margin: 0;
  padding: 0 22px 20px;
  color: var(--muted);
}

/* X埋め込み */
.x-embed {
  display: grid;
  gap: 18px;
  max-width: 560px;
}

.x-card {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 253, 249, 0.84);
}

.x-card-mark {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--black);
  color: #fff;
  font-size: 20px;
  font-weight: 800;
}

.x-card-handle {
  display: block;
  margin-bottom: 6px;
  font-size: 17px;
  font-weight: 900;
}

.x-card p {
  margin-bottom: 14px;
  color: var(--muted);
  font-size: 15px;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 26px clamp(20px, 4vw, 56px);
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-tagline {
  margin: 0;
}

.footer-links {
  display: flex;
  gap: 16px;
}

.footer-links a:hover {
  color: var(--red);
}

.footer-copy {
  color: var(--muted);
  font-weight: 700;
}

@media (max-width: 900px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }

  .site-nav {
    width: 100%;
    justify-content: space-between;
  }

  .hero,
  .section-grid,
  .section-heading,
  .join-panel {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-visual {
    min-height: 400px;
  }

  .concept-grid,
  .member-grid,
  .stage-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .join-actions {
    max-width: none;
    justify-content: flex-start;
  }

  .join-actions .button {
    width: auto;
  }
}

@media (max-width: 640px) {
  .section-shell {
    width: min(100% - 28px, 1120px);
    padding: 58px 0;
  }

  .brand span {
    font-size: 15px;
  }

  .site-nav {
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 2px;
    font-size: 13px;
  }

  h1 {
    font-size: clamp(54px, 18vw, 76px);
  }

  .hero-actions .button,
  .join-actions .button {
    width: 100%;
  }

  .hero-visual {
    min-height: 330px;
  }

  .card-stack {
    width: min(270px, 74vw);
  }

  .card-front {
    padding: 22px;
  }

  .card-back {
    font-size: 46px;
    transform: rotate(8deg) translate(18px, 18px);
  }

  .concept-grid,
  .member-grid,
  .stage-grid,
  .stats-row,
  .audience-grid,
  .event-card {
    grid-template-columns: 1fr;
  }

  .past-grid {
    grid-template-columns: 1fr;
  }

  .event-number {
    width: 96px;
    font-size: 34px;
  }

  .info-card {
    min-height: 190px;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }
}

.back-to-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  display: none;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--red);
  color: #fff;
  font-size: 20px;
  font-weight: 900;
  box-shadow: 0 10px 24px rgba(17, 17, 17, 0.22);
  z-index: 30;
  opacity: 0;
  transform: translateY(8px);
  transition:
    opacity 200ms ease,
    transform 200ms ease;
}

.back-to-top.is-visible {
  display: inline-flex;
  opacity: 1;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-2px);
}