:root {
  --bg-page: #ffffff;
  --bg-soft: #f3f6fb;
  --surface-primary: #ffffff;
  --text-heading: #071a38;
  --text-body: #263a55;
  --text-muted: #61728a;
  --object-primary: #165cc8;
  --object-accent: #ffd84d;
  --border-default: #ccd6e3;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-12: 48px;
  --space-16: 64px;
  --space-24: 96px;
  --radius-sm: 8px;
  --radius-md: 16px;
  --shadow-md: 0 20px 60px rgba(7, 26, 56, .12);
  --font-display: "Yu Mincho", "Hiragino Mincho ProN", "Noto Serif JP", serif;
  --font-body: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Noto Sans JP", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg-page); color: var(--text-body); font-family: var(--font-body); line-height: 1.85; }
img { display: block; max-width: 100%; }
a { color: inherit; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 100; padding: 12px 16px; background: var(--text-heading); color: #fff; }
.meetalive-page .skip-link { color: #fff; }
.skip-link:focus { top: 16px; }
a:focus-visible { outline: 3px solid var(--object-accent); outline-offset: 4px; }

.hero { width: min(1320px, calc(100% - 64px)); margin: 0 auto; padding: 16px 0 24px; }
.hero-banner { position: relative; display: grid; place-items: center; width: 100%; max-width: 1124px; aspect-ratio: 1840 / 900; margin: 0 auto; overflow: hidden; background: var(--text-heading); color: #fff; }
.hero-banner > p { margin: 0; font-family: var(--font-display); font-size: 1.35rem; }
.hero-banner img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 1; }
.hero-banner img.is-ready { opacity: 1; }
.kicker, .section-label { margin: 0 0 20px; color: var(--object-primary); font-size: .74rem; font-weight: 800; letter-spacing: .16em; }
h1, h2, h3, p { overflow-wrap: anywhere; }
h1 { margin: 0; color: var(--text-heading); font-family: var(--font-display); font-size: clamp(3.4rem, 5.8vw, 6.5rem); font-weight: 600; line-height: 1.18; letter-spacing: -.055em; }
.marker { position: relative; z-index: 0; white-space: nowrap; }
.marker::after { position: absolute; z-index: -1; left: -.04em; right: -.04em; bottom: .08em; height: .22em; content: ""; background: var(--object-accent); transform: rotate(-1deg); }
.hero-lead { max-width: 590px; margin: 32px 0; font-size: 1.05rem; }
.meetalive-page .meetalive-action { min-width: 230px; color: var(--text-inv); }
.meetalive-page .meetalive-action--primary { margin-top: 0; border-color: var(--object-primary); background: var(--object-primary); color: #fff; }
.meetalive-page .meetalive-action--primary:hover { border-color: var(--brand-fill); background: var(--brand-fill); color: var(--brand-ink); }

.hero-bar { display: flex; align-items: stretch; justify-content: space-between; gap: 24px; margin-top: 16px; }
.hero-facts { flex: 1; display: grid; grid-template-columns: repeat(2, 1fr); margin: 0; border-top: 1px solid var(--border-default); border-bottom: 1px solid var(--border-default); }
.hero-facts div { display: grid; grid-template-columns: 72px 1fr; gap: 8px; padding: 20px 24px; border-right: 1px solid var(--border-default); }
.hero-facts div:last-child { border-right: 0; }
.hero-facts dt { color: var(--text-muted); font-size: .72rem; font-weight: 700; }
.hero-facts dd { margin: 0; color: var(--text-heading); font-family: var(--font-display); font-size: 1rem; font-weight: 700; line-height: 1.5; }
.hero-bar .meetalive-action { min-width: 220px; }

.section-pad { padding: 88px max(32px, calc((100vw - 1180px) / 2)); }
.section-heading { max-width: 460px; }
.section-heading h2, .registration h2 { margin: 0; color: var(--text-heading); font-family: var(--font-display); font-size: clamp(2rem, 3vw, 3rem); font-weight: 600; line-height: 1.25; letter-spacing: -.04em; }
.intro { display: grid; grid-template-columns: .85fr 1.15fr; gap: 64px; }
.mini-bios { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.mini-bios article { padding-top: 20px; border-top: 3px solid var(--text-heading); }
.mini-bios .name { margin: 0 0 16px; color: var(--text-heading); font-family: var(--font-display); font-size: 1.65rem; font-weight: 700; }
.mini-bios .fact { margin-top: 28px; color: var(--object-primary); font-weight: 800; line-height: 1.55; }
.mini-bios small { color: var(--text-muted); font-size: .68rem; font-weight: 500; }

.purpose { background: var(--text-heading); color: #dbe6f4; }
.purpose .section-label { color: #82b5ff; }
.purpose h2 { color: #fff; }
.purpose-layout { display: grid; grid-template-columns: .85fr 1.15fr; gap: 64px; }
.purpose-copy { font-size: 1rem; }
.purpose-copy .lead { margin-top: 0; color: #fff; font-family: var(--font-display); font-size: clamp(1.5rem, 2.2vw, 2.1rem); font-weight: 700; line-height: 1.6; }
.record-flow { display: flex; align-items: center; justify-content: space-between; margin-top: 80px; padding-top: 32px; border-top: 1px solid rgba(255, 255, 255, .28); color: #fff; font-family: var(--font-display); font-size: 1.05rem; font-weight: 700; }
.record-flow i { flex: 1; height: 1px; margin: 0 20px; background: rgba(255, 255, 255, .32); }

.themes { display: grid; grid-template-columns: .72fr 1.28fr; gap: 64px; background: var(--bg-soft); }
.themes-heading > p:last-child { margin-top: 24px; color: var(--text-muted); font-size: .82rem; }
.theme-list article { position: relative; display: grid; grid-template-columns: 100px 1fr; gap: 24px; padding: 32px 0; border-top: 1px solid var(--border-default); }
.theme-list article:last-child { border-bottom: 1px solid var(--border-default); }
.theme-list .theme-word { margin: 0; color: var(--object-primary); font-family: var(--font-display); font-size: 1.35rem; font-weight: 700; }
.theme-list h3 { margin: 0 0 12px; color: var(--text-heading); font-size: 1.25rem; line-height: 1.55; }
.theme-list article > p:last-child { grid-column: 2; margin: 0; color: var(--text-muted); }

.references { display: grid; grid-template-columns: .72fr 1.28fr; gap: 64px; }
.references .section-heading > p:last-child { margin-top: 24px; color: var(--text-muted); }
.reference-list { border-top: 2px solid var(--text-heading); }
.reference-list a { display: grid; grid-template-columns: 104px 1fr; gap: 8px 24px; padding: 28px 0; border-bottom: 1px solid var(--border-default); text-decoration: none; transition: color .2s ease; }
.reference-list a:hover { color: var(--object-primary); }
.reference-topic { grid-row: 1 / span 2; color: var(--object-primary); font-family: var(--font-display); font-weight: 700; }
.reference-list strong { color: var(--text-heading); font-size: 1.05rem; line-height: 1.6; }
.reference-note { color: var(--text-muted); font-size: .76rem; font-weight: 700; }
.reference-note i { margin-left: 8px; font-style: normal; }

.speakers > .section-heading { margin-bottom: 64px; }
.speaker { display: grid; grid-template-columns: minmax(260px, 360px) 1fr; gap: 80px; align-items: center; padding: 64px 0; border-top: 1px solid var(--border-default); }
.speaker-sato { grid-template-columns: 1fr minmax(260px, 360px); }
.speaker-sato .speaker-photo { grid-column: 2; }
.speaker-sato .speaker-copy { grid-column: 1; grid-row: 1; }
.speaker-photo { position: relative; width: min(360px, 100%); aspect-ratio: 1; overflow: hidden; border-radius: 50%; background: var(--bg-soft); }
.speaker-photo img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.speaker-keito .speaker-photo { border-radius: 50%; }
.speaker-keito .speaker-photo img { object-fit: contain; }
.speaker-sato .speaker-photo { justify-self: end; border-radius: 50%; }
.speaker-sato .speaker-photo img { object-position: 50% 22%; }
.speaker-role { margin: 0 0 8px; color: var(--object-primary); font-size: .8rem; font-weight: 800; }
.speaker-copy h3 { margin: 0 0 24px; color: var(--text-heading); font-family: var(--font-display); font-size: clamp(2.4rem, 4vw, 4rem); line-height: 1.1; }
.speaker-copy > p:not(.speaker-role):not(.source-links) { max-width: 640px; }
.source-links { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 28px; }
.source-links a, .text-link { color: var(--object-primary); font-size: .82rem; font-weight: 800; text-decoration: underline; text-underline-offset: 5px; }

.books { display: grid; grid-template-columns: .65fr 1.35fr; gap: 64px 96px; background: var(--bg-soft); }
.books > .section-heading { grid-row: 1 / span 2; }
.book { display: grid; grid-template-columns: 210px 1fr; gap: 40px; padding-bottom: 56px; border-bottom: 1px solid var(--border-default); }
.book-cover { align-self: start; box-shadow: var(--shadow-md); transition: transform .2s ease; }
.book-cover:hover { transform: rotate(-1deg) translateY(-3px); }
.book-cover img { width: 100%; height: auto; }
.book-position { margin: 0 0 12px; color: var(--object-primary); font-size: .74rem; font-weight: 800; }
.book h3 { margin: 0 0 16px; color: var(--text-heading); font-family: var(--font-display); font-size: clamp(1.8rem, 3vw, 2.8rem); line-height: 1.35; }
.book-meta { color: var(--text-muted); font-size: .8rem; font-weight: 700; }
.text-link { display: inline-flex; gap: 12px; margin-top: 16px; }

.event { display: grid; grid-template-columns: .72fr 1.28fr; gap: 64px; }
.event-list { margin: 0; border-top: 2px solid var(--text-heading); }
.event-list div { display: grid; grid-template-columns: 120px 1fr; padding: 24px 0; border-bottom: 1px solid var(--border-default); }
.event-list dt { color: var(--text-muted); font-size: .8rem; font-weight: 700; }
.event-list dd { margin: 0; color: var(--text-heading); font-family: var(--font-display); font-size: 1.2rem; font-weight: 700; }
.event-note { grid-column: 2; margin: -56px 0 0; color: var(--text-muted); font-size: .82rem; }

.registration { background: var(--ink); color: var(--text-inv); }
.registration-inner { max-width: 720px; margin: 0 auto; text-align: center; }
.registration .section-label { color: var(--brand-soft); }
.registration h2 { color: #fff; }
.registration-panel { display: grid; grid-template-columns: minmax(160px, .65fr) minmax(0, 1.35fr); align-items: stretch; margin: 36px 0 32px; border: 1px solid var(--line-inv); text-align: left; }
.registration-panel p { margin: 0; padding: 22px; }
.registration-panel p + p { border-left: 1px solid var(--line-inv); color: var(--text-inv-2); font-size: .88rem; line-height: 1.8; }
.registration-status { display: grid; place-items: center; background: var(--brand-fill); color: var(--brand-ink); font-size: 1rem; font-weight: 800; letter-spacing: .08em; }
.registration .meetalive-action { margin-top: 0; color: var(--text-inv); }

@media (max-width: 900px) {
  .hero { width: calc(100% - 40px); padding-top: 16px; }
  .hero-bar { flex-direction: column; }
  .hero-facts { grid-template-columns: 1fr; }
  .hero-facts div { border-right: 0; border-bottom: 1px solid var(--border-default); }
  .section-pad { padding: 88px 24px; }
  .intro, .purpose-layout, .themes, .references, .event, .books { grid-template-columns: 1fr; gap: 48px; }
  .mini-bios { gap: 24px; }
  .record-flow { flex-wrap: wrap; gap: 16px; justify-content: flex-start; }
  .record-flow i { flex: 0 0 28px; margin: 0; }
  .speaker, .speaker-sato { grid-template-columns: 1fr; gap: 40px; }
  .speaker-sato .speaker-photo, .speaker-sato .speaker-copy { grid-column: 1; }
  .speaker-sato .speaker-photo { grid-row: 1; }
  .speaker-keito .speaker-photo, .speaker-sato .speaker-photo { width: min(320px, 90%); justify-self: start; }
  .books > .section-heading { grid-row: auto; }
  .event-note { grid-column: auto; margin: -24px 0 0; }
}

@media (max-width: 560px) {
  .hero-lead { font-size: .95rem; }
  .hero { width: calc(100% - 24px); }
  .mini-bios { grid-template-columns: 1fr; }
  .theme-list article { grid-template-columns: 72px 1fr; gap: 16px; }
  .theme-list article > p:last-child { grid-column: 1 / -1; }
  .reference-list a { grid-template-columns: 1fr; }
  .reference-topic { grid-row: auto; }
  .book { grid-template-columns: 112px 1fr; gap: 24px; }
  .book h3 { font-size: 1.55rem; }
  .book-copy > p:not(.book-position):not(.book-meta) { grid-column: 1 / -1; }
  .event-list div { grid-template-columns: 88px 1fr; gap: 8px; }
  .registration-panel { grid-template-columns: 1fr; text-align: center; }
  .registration-panel p + p { border-top: 1px solid var(--line-inv); border-left: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}