/* 2026/05/25 17:13 */
:root {
  --bg: #f5f8fc;
  --surface: #ffffff;
  --surface-2: #eef4ff;
  --text: #17324d;
  --muted: #5f748a;
  --line: #dce6f2;
  --primary: #1565d8;
  --primary-2: #58a6ff;
  --accent: #7a8cff;
  --shadow: 0 12px 40px rgba(20, 57, 112, .10);
  --radius: 20px;
  --radius-sm: 14px;
  --container: min(1260px, calc(100% - 32px));
}
* {
  box-sizing: border-box
}
html {
  scroll-behavior: smooth
}
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(88, 166, 255, .18), transparent 28%), linear-gradient(180deg, #fbfdff 0%, var(--bg) 55%, #eef4fb 100%);
  line-height: 1.65;
}
img {
  max-width: 100%
}
a {
  color: var(--primary);
  text-decoration: none
}
a:hover {
  text-decoration: underline
}
.container {
  width: var(--container);
  margin: 0 auto
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: saturate(180%) blur(14px);
  background: rgba(255, 255, 255, .86);
  border-bottom: 1px solid rgba(220, 230, 242, .85);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--text)
}
.brand:hover {
  text-decoration: none
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  color: #fff;
  font-weight: 800;
  font-size: 12px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: var(--shadow);
}
.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2
}
.brand-text strong {
  font-size: 1rem
}
.brand-text small {
  color: var(--muted)
}
.site-nav ul {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: wrap
}
.site-nav a {
  display: block;
  padding: 10px 12px;
  border-radius: 999px;
  color: var(--text);
  font-size: .92rem;
}
.site-nav a.active, .site-nav a:hover {
  background: var(--surface-2);
  color: var(--primary);
  text-decoration: none;
}
.nav-toggle {
  display: none;
  border: 0;
  background: var(--surface-2);
  border-radius: 12px;
  padding: 10px 12px;
  font-size: 1.2rem;
  color: var(--text);
}
.hero-home {
  padding: 24px 0 0
}
.slideshow {
  position: relative;
  overflow: hidden;
  min-height: 620px;
  border-radius: 0 0 34px 34px;
  box-shadow: var(--shadow);
}
.slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity .8s ease;
  background-size: cover;
  background-position: center;
}
.slide::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(16, 37, 63, .10), rgba(16, 37, 63, .28));
}
.slide.is-active {
  opacity: 1
}
.hero-overlay {
  position: relative;
  z-index: 2;
  min-height: 620px;
  display: flex;
  align-items: center;
}
.hero-overlay-inner {
  width: var(--container);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(220px, 340px) 1fr;
  gap: 28px;
  align-items: end;
}

/* privacy policy */
.ppolicy { position: relative; display: inline-block; width: 100%; background: #C2DFF4; padding: 1em;margin-bottom: 1em;}
.ppolicy:before {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  margin-left: -15px;
  border: 25px solid transparent;
  border-top: 25px solid #C2DFF4;
}

.ppolicy p {
  margin: 0;
  padding: 0;
}

.ppolicy-r { position: relative; display: inline-block; width: 90%; background: #C2DFF4; padding: 1em;margin-bottom: 1em;}
.ppolicy-r:before {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  margin-left: -15px;
  border: 25px solid transparent;
  border-top: 25px solid #C2DFF4;
}

.ppolicy-r p {
  margin: 0;
  padding: 0;
}

/* submission link */
.submission_link {width: 100%; position: relative; text-align: center; font-size: 110%; font-weight: bold; display: block; margin: 1.5em 0 1.5em 1em;}

/* submission.html only: reduce space between first and second card sections */
.submission-page main > .section:first-child {
  padding-bottom: 24px;
}

.submission-page main > .section:first-child + .section {
  padding-top: 24px;
}


/* School Lecturer title */
.lec_title {font-size: 85%;}
/* deadline */
.deadline {
	font-weight: bold;
	font-size: 1.2em;
  text-decoration: underline;
  text-decoration-color: #B40E11;
  text-decoration-thickness: 2px;
  text-underline-offset: 8px;
}

/* deadline text */
.dl_date {font-weight: bold;}

/* history */
.history-grid {
  margin-top: 24px;
}

/* tutorial speaker photo */
/* Tutorial speaker card with photo */
.tutorial-speaker-card {
  display: flex;
  align-items: center;
  gap: 22px;
}

.tutorial-speaker-card .avatar-placeholder {
  flex: 0 0 96px;
  width: 96px;
  height: 96px;
  margin-bottom: 0;
}

.tutorial-speaker-card .speaker-info {
  min-width: 0;
}

.tutorial-speaker-card .speaker-role {
  margin: 0 0 6px;
}

.tutorial-speaker-card .speaker-name {
  margin: 0 0 6px;
}

.tutorial-speaker-card .speaker-affiliation {
  margin: 0 0 8px;
}

.tutorial-speaker-card .speaker-title {
  margin: 0;
}
/* --- ここまで --- */

@media (max-width: 680px) {
  .tutorial-speaker-card {
    align-items: flex-start;
    gap: 16px;
  }

  .tutorial-speaker-card .avatar-placeholder {
    flex-basis: 72px;
    width: 72px;
    height: 72px;
  }
}

/* speakers page */
.speaker-section {
  margin-top: 28px;
}

.speaker-section:first-child {
  margin-top: 0;
}

.speaker-section-title {
  margin: 0 0 14px;
  font-size: 1.25rem;
  letter-spacing: -.02em;
}

.keynote-card {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 20px;
  align-items: start;
  background: linear-gradient(180deg, #ffffff 0%, #f4f8ff 100%);
}

.keynote-card .avatar-placeholder {
  margin-bottom: 0;
}

.speaker-label {
  display: inline-block;
  margin: 0 0 8px;
  padding: 5px 10px;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--primary);
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.speaker-list {
  list-style: none;
  margin: 0;
  padding: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.speaker-list-item {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) 2fr;
  gap: 20px;
  padding: 20px 24px;
  border-bottom: 1px solid var(--line);
}

.speaker-list-item:last-child {
  border-bottom: 0;
}

.speaker-list-item h4 {
  margin: 0 0 4px;
  font-size: 1.05rem;
}

.speaker-list-item p {
  margin: 0;
}

/* speaker blur */
.speakers-wrapper {
  position: relative;
  border-radius: var(--radius);
}
/* 実際にぼかすのは内側だけ */
.speakers-wrapper.is-blurred .speakers-content {
  filter: blur(6px);
  pointer-events: none;
  user-select: none;
}
/* オーバーレイは外側に載せる */
.speakers-wrapper.is-blurred::after {
  content: "To be announced";
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.55);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  color: var(--text);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  z-index: 2;
}
/* 公開後はこのクラスを外すだけ */
.speakers-wrapper .speakers-content {
  position: relative;
  z-index: 1;
}
.history-card {
  display: block;
  color: var(--text);
  text-decoration: none;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.history-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 44px rgba(20, 57, 112, .14);
  border-color: rgba(21, 101, 216, .28);
  text-decoration: none;
}
.history-card h3 {
  margin: 10px 0 8px;
}
.history-card p {
  margin: 0 0 16px;
  color: var(--muted);
}
.history-year {
  display: inline-block;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--primary);
  font-size: .8rem;
  font-weight: 800;
  letter-spacing: .08em;
}
.history-link {
  font-weight: 700;
  color: var(--primary);
}

/* brlscool tilte nowrap */

/*
.brl-school-hero-copy {
  min-width: 0;
}

#brl-school-title {
  white-space: nowrap;
  font-size: clamp(1.8rem, 3vw, 4.8rem);
  line-height: 1;
  letter-spacing: -0.04em;
}

@media (max-width: 600px) {
  #brl-school-title {
    font-size: clamp(1.6rem, 9vw, 2.4rem);
    letter-spacing: -0.05em;
  }
}

/* ここまで */
*/

/* brlschool logo */

/* BRL School page spacing */
.brl-school-page .brl-school-hero + .section {
  padding-top: 32px;
}

/* BRL School hero */
.brl-school-hero {
  padding: 36px 0 0;
}

.brl-school-hero-card {
  display: grid;
  grid-template-columns: minmax(280px, 1fr) minmax(260px, .75fr);
  gap: 24px;
  align-items: center;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background:
    radial-gradient(circle at top left, rgba(180, 14, 17, .10), transparent 32%),
    linear-gradient(135deg, #ffffff 0%, #f4f8ff 100%);
  box-shadow: var(--shadow);
}

.brl-school-logo-wrap {
  display: grid;
  place-items: center;
  padding: 8px;
}

.brl-school-logo {
  display: block;
  width: min(100%, 480px);
  height: auto;
  border-radius: 24px;
  box-shadow: 0 14px 34px rgba(20, 57, 112, .14);
}

.brl-school-hero-copy {
  padding: 8px;
}

.brl-school-hero-copy h1 {
  margin: 0;
  font-size: clamp(2rem, 3.4vw, 3.5rem);
  line-height: 1;
  letter-spacing: -.04em;
}

.brl-school-hero-copy p:not(.eyebrow) {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.3vw, 1.12rem);
  max-width: 42rem;
}

@media (max-width: 900px) {
  .brl-school-hero {
    padding-top: 26px;
  }

  .brl-school-hero-card {
    grid-template-columns: 1fr;
    padding: 18px;
  }

  .brl-school-logo {
    width: min(100%, 520px);
    border-radius: 18px;
  }
}

@media (max-width: 680px) {
  .brl-school-hero-card {
    padding: 14px;
    border-radius: 22px;
  }

  .brl-school-logo {
    width: min(100%, 420px);
  }

  .brl-school-hero-copy {
    padding: 6px;
  }
}


/* ---- ここまで　*/


/* logo area */


.logo {
  height: 44px;   /* ヘッダーに合わせる */
  width: auto;
  display: block;
}
.logo-slot {
  min-height: 108px;
  border-radius: 22px;
  border: 1px dashed rgba(255, 255, 255, .9);
  background: rgba(255, 255, 255, .18);
  backdrop-filter: blur(8px);
  display: grid;
  place-items: center;
  color: #fff;
  text-align: center;
  padding: 20px;
  font-weight: 700;
  letter-spacing: .04em;
}
.logo-slot small {
  font-weight: 500;
  opacity: .9
}
.hero-copy {
  background: rgba(255, 255, 255, .72);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, .8);
  padding: 28px 30px;
  border-radius: 24px;
  box-shadow: 0 16px 40px rgba(10, 40, 90, .14);
}
.eyebrow {
  margin: 0 0 10px;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--primary);
  font-size: .82rem;
  font-weight: 700;
}
.hero-copy h1 {
  margin: 0;
  font-size: clamp(2.5rem, 6vw, 5rem);
  line-height: .95;
  letter-spacing: -.03em;
}
.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.35rem);
  max-width: 52rem;
  margin: 14px 0 0;
  color: #244868;
}
.slide-dots {
  position: absolute;
  right: 24px;
  bottom: 24px;
  z-index: 3;
  display: flex;
  gap: 10px;
}
.dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  border: 0;
  padding: 0;
  background: rgba(255, 255, 255, .45);
}
.dot.is-active {
  background: #fff
}
.meta-band {
  margin-top: -38px;
  position: relative;
  z-index: 4
}
.meta-grid {
  width: var(--container);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.meta-card {
  background: rgba(255, 255, 255, .88);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(220, 230, 242, .9);
  box-shadow: var(--shadow);
  border-radius: 20px;
  padding: 20px;
  min-height: 112px;
}
.meta-label {
  display: block;
  font-size: .78rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 8px;
}
.section {
  padding: 72px 0
}
.section-heading {
  margin-bottom: 24px
}
.section h2 {
  font-size: clamp(1.8rem, 3vw, 2.7rem);
  letter-spacing: -.03em;
  margin: 0 0 10px;
}
.section-intro {
  margin: 0;
  color: var(--muted);
  max-width: 70ch
}
.grid {
  display: grid;
  gap: 18px
}
.grid.two {
  grid-template-columns: repeat(2, 1fr)
}
.grid.three {
  grid-template-columns: repeat(3, 1fr)
}
.card, .speaker-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: var(--shadow);
}
.grid.two + .grid.two {
  margin-top: 20px;
}
.grid + .grid {
  margin-top: 20px;
}
.card-emphasis {
  background: linear-gradient(180deg, #ffffff 0%, #f4f8ff 100%);
}
.card-highlight {
  background: linear-gradient(135deg, rgba(21, 101, 216, .08), rgba(122, 140, 255, .08));
}
.bullet-grid {
  columns: 2;
  padding-left: 20px;
}
.button {
  display: inline-block;
  padding: 12px 18px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-weight: 700;
  box-shadow: var(--shadow);
}
.button:hover {
  text-decoration: none;
  filter: brightness(1.03)
}
.button.disabled {
  opacity: .6;
  pointer-events: none;
}
.text-link {
  font-weight: 700
}
.timeline {
  display: grid;
  gap: 14px;
}
.timeline.compact {
  grid-template-columns: repeat(3, 1fr);
}
.timeline-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 16px;
  align-items: start;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 18px 20px;
  box-shadow: var(--shadow);
}
.timeline-date {
  font-size: .84rem;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--primary);
}
.program-table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border-radius: 14px;
}
.program-table th, .program-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}
.program-table thead th {
  background: var(--surface-2);
}
/* speaker typography */
.speaker-card {
  position: relative;
  overflow: hidden;
}

.speaker-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 5px;
  background: linear-gradient(180deg, var(--primary), var(--accent));
  opacity: .85;
}

.speaker-role {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 0 0 12px;
  padding: 5px 11px;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--primary);
  font-size: .74rem;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.speaker-role.keynote {
  background: linear-gradient(135deg, rgba(21, 101, 216, .12), rgba(122, 140, 255, .16));
  color: var(--primary);
}

.speaker-role.tutorial {
  background: rgba(88, 166, 255, .14);
  color: #245f9f;
}

.speaker-role.invited {
  background: var(--surface-2);
  color: var(--primary);
}

.speaker-name {
  margin: 0 0 6px;
  color: var(--text);
  font-size: clamp(1.22rem, 1.8vw, 1.55rem);
  line-height: 1.18;
  letter-spacing: -.025em;
  font-weight: 800;
}

.speaker-affiliation {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: .95rem;
  line-height: 1.45;
  font-weight: 600;
}

.speaker-affiliation::before {
  content: "Affiliation";
  display: block;
  margin-bottom: 2px;
  color: var(--primary);
  font-size: .68rem;
  font-weight: 800;
  letter-spacing: .1em;
  text-transform: uppercase;
  opacity: .75;
}

.speaker-title {
  margin: 16px 0 0;
  padding: 14px 16px;
  border-left: 3px solid var(--primary-2);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background:
    linear-gradient(90deg, rgba(88, 166, 255, .12), rgba(255, 255, 255, .55));
  color: #25435f;
  font-size: .98rem;
  line-height: 1.55;
  font-weight: 650;
}

.speaker-title::before {
  content: "Talk";
  display: block;
  margin-bottom: 4px;
  color: var(--primary);
  font-size: .7rem;
  font-weight: 800;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.speaker-title:empty,
.speaker-title.is-tba {
  color: var(--muted);
  font-style: italic;
  font-weight: 500;
}

/* invited speaker list typography */
.speaker-list-item {
  position: relative;
}

.speaker-list-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  bottom: 18px;
  width: 4px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--primary), var(--accent));
  opacity: .75;
}

.speaker-list-item .speaker-name {
  margin-bottom: 4px;
  font-size: clamp(1.08rem, 1.5vw, 1.32rem);
}

.speaker-list-item .speaker-affiliation {
  margin-bottom: 0;
}

.speaker-list-item .speaker-affiliation::before {
  display: none;
}

.speaker-list-item .speaker-title {
  margin: 0;
  align-self: center;
}


/* keynote/tutorial */

/* speaker sections */
.speaker-section {
  margin-top: 36px;
}

.speaker-section:first-child {
  margin-top: 0;
}

.speaker-section-title {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 16px;
  color: var(--text);
  font-size: 1.35rem;
  line-height: 1.25;
  letter-spacing: -.02em;
}

.speaker-section-title::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--line), transparent);
}

/* common speaker card */
.speaker-card {
  position: relative;
  overflow: hidden;
}

.speaker-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 5px;
  background: linear-gradient(180deg, var(--primary), var(--accent));
  opacity: .8;
}

/* role label */
.speaker-role {
  display: inline-flex;
  align-items: center;
  margin: 0 0 12px;
  padding: 5px 11px;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--primary);
  font-size: .74rem;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: .08em;
  text-transform: uppercase;
}

/* keynote */
.speaker-role.keynote {
  background: linear-gradient(135deg, rgba(21, 101, 216, .14), rgba(122, 140, 255, .20));
  color: var(--primary);
}

.keynote-card {
  background:
    linear-gradient(135deg, rgba(21, 101, 216, .08), rgba(122, 140, 255, .08)),
    var(--surface);
}

.keynote-card::before {
  width: 7px;
  opacity: 1;
}

/* tutorial */
.speaker-role.tutorial {
  background: rgba(88, 166, 255, .16);
  color: #245f9f;
}

.tutorial-card {
  background:
    linear-gradient(180deg, #ffffff 0%, #f7fbff 100%);
}

.tutorial-card::before {
  background: linear-gradient(180deg, var(--primary-2), var(--primary));
}

/* name / affiliation / title */
.speaker-name {
  margin: 0 0 6px;
  color: var(--text);
  font-size: clamp(1.22rem, 1.8vw, 1.55rem);
  line-height: 1.18;
  letter-spacing: -.025em;
  font-weight: 800;
}

.speaker-affiliation {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: .95rem;
  line-height: 1.45;
  font-weight: 600;
}

.speaker-title {
  margin: 16px 0 0;
  padding: 14px 16px;
  border-left: 3px solid var(--primary-2);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: linear-gradient(90deg, rgba(88, 166, 255, .12), rgba(255, 255, 255, .55));
  color: #25435f;
  font-size: .98rem;
  line-height: 1.55;
  font-weight: 650;
}

.speaker-title::before {
  content: "Talk";
  display: block;
  margin-bottom: 4px;
  color: var(--primary);
  font-size: .7rem;
  font-weight: 800;
  letter-spacing: .1em;
  text-transform: uppercase;
}

/* TBA style */
.speaker-tba .speaker-name,
.speaker-title.is-tba {
  color: var(--muted);
  font-style: italic;
}

.speaker-title.is-tba {
  font-weight: 500;
}

/* keynote / tutorial: wide featured cards */
.featured-speaker-card {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 22px;
  align-items: start;
}

.featured-speaker-card .avatar-placeholder {
  margin-bottom: 0;
}

.featured-speaker-card .speaker-info {
  min-width: 0;
}

.featured-speaker-card .speaker-affiliation {
  max-width: 72ch;
  margin: 0 0 14px;
  color: var(--muted);
  font-size: .98rem;
  line-height: 1.45;
  font-weight: 600;
  overflow-wrap: normal;
  word-break: normal;
}

.featured-speaker-card .speaker-title {
  max-width: 86ch;
}

/* keynote/tutorial ここまで */



.avatar-placeholder {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  background: linear-gradient(135deg, #d9e8ff, #eef4ff);
  border: 1px solid var(--line);
  margin-bottom: 16px;
  overflow:hidden; /* 写真を丸く */
}
.avatar-placeholder img{
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
}

.muted {
  color: var(--muted)
}
.committee-list {
  padding-left: 18px
}
.map-placeholder {
  min-height: 260px;
  display: grid;
  place-items: center;
  background:
    linear-gradient(180deg, rgba(21, 101, 216, .06), rgba(21, 101, 216, .02)), repeating-linear-gradient(45deg, rgba(88, 166, 255, .08), rgba(88, 166, 255, .08) 12px, rgba(255, 255, 255, 0) 12px, rgba(255, 255, 255, 0) 24px);
}
.site-footer {
  padding: 48px 0 64px;
  border-top: 1px solid var(--line);
  background: rgba(255, 255, 255, .72);
  backdrop-filter: blur(10px);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 24px;
}
@media (max-width: 1100px) {
  .hero-overlay-inner {
    grid-template-columns: 1fr
  }
  .logo-slot {
    max-width: 340px
  }
  .meta-grid {
    grid-template-columns: repeat(2, 1fr)
  }
  .timeline.compact {
    grid-template-columns: 1fr 1fr
  }
}
@media (max-width: 900px) {

  .keynote-card,
  .speaker-list-item {
    grid-template-columns: 1fr;
  }

  .keynote-card .avatar-placeholder {
    margin-bottom: 4px;
  }	
	/* ハンバーガーボタン */
  .nav-toggle {
    display: block;
    margin-left: auto;
    flex-shrink: 0;
  }
  /* ヘッダー内レイアウト調整 */
  .header-inner {
    gap: 12px;
  }
  .brand {
    min-width: 0;
    flex: 1;
  }
  .brand-text {
    min-width: 0;
  }
  .brand-text small {
    font-size: .8rem;
    line-height: 1.3;
    overflow-wrap: anywhere;
  }
  /* モバイルナビ */
  .site-nav {
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    display: none;
    background: rgba(255, 255, 255, .97);
    border-bottom: 1px solid var(--line);
    padding: 12px 16px; /* ←ここが重要（containerを使わない） */
  }
  .site-nav.open {
    display: block;
  }
  .site-nav ul {
    display: grid;
    gap: 6px;
    list-style: none;
    margin: 0;
    padding: 0;
    width: 100%;
  }
  .site-nav li {
    min-width: 0;
  }
  .site-nav a {
    display: block;
    width: 100%;
    padding: 12px 14px;
    border-radius: 12px;
  }
  /* レイアウト崩れ防止 */
  .grid.two, .grid.three, .footer-grid, .timeline.compact {
    grid-template-columns: 1fr;
  }
  .timeline-item {
    grid-template-columns: 1fr;
  }
  .slideshow, .hero-overlay {
    min-height: 540px;
  }
}
@media (max-width: 680px) {
  .hero-home {
    padding-top: 10px
  }
  .slideshow {
    border-radius: 0 0 24px 24px
  }
  .hero-copy {
    padding: 22px 20px
  }
  .meta-band {
    margin-top: -22px
  }
  .meta-grid {
    grid-template-columns: 1fr
  }
  .section {
    padding: 58px 0
  }
  .bullet-grid {
    columns: 1
  }
}