:root {
  color-scheme: light;
  --pink-900: #8d1451;
  --pink-700: #c61e6c;
  --pink-500: #ff4f9a;
  --pink-300: #ffc2da;
  --pink-100: #ffe8f1;
  --ink-900: #1a0f16;
  --ink-700: #3b2634;
  --ink-500: #5b4152;
  --ink-100: #f5f0f4;
  --cream: #fff7fb;
  --shadow: 0 30px 60px rgba(141, 20, 81, 0.15);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 12px;
  --max-width: 1100px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Lato, "Noto Sans JP", "ヒラギノ角ゴ ProN",
    "Hiragino Kaku Gothic ProN", メイリオ, Meiryo, "ＭＳ Ｐゴシック",
    "MS PGothic", sans-serif;
  color: var(--ink-900);
  letter-spacing: 0.02em;
  line-height: 1.8;
  background: radial-gradient(circle at 10% 10%, #ffffff 0%, transparent 45%),
    radial-gradient(circle at 90% 0%, #ffffff 0%, transparent 40%),
    linear-gradient(180deg, #ffffff 0%, #fff1f7 40%, #fff7fb 100%);
}

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

a:hover {
  color: var(--pink-700);
}

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

.container {
  width: min(100% - 32px, var(--max-width));
  margin: 0 auto;
}

.section {
  padding: 72px 0;
}

.section.light {
  background: #fff;
}

.section.light.flush-top {
  padding-top: 0;
}

.section-title {
  font-family: Lato, "Noto Sans JP", "ヒラギノ角ゴ ProN",
    "Hiragino Kaku Gothic ProN", メイリオ, Meiryo, "ＭＳ Ｐゴシック",
    "MS PGothic", sans-serif;
  font-size: clamp(1.4rem, 2.1vw, 2.1rem);
  margin: 0 0 24px;
}

.section-title.center {
  text-align: center;
}

.center {
  text-align: center;
}

.narrow {
  max-width: 720px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 24px;
  border-radius: 999px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform 0.2s ease;
}

.button.primary {
  background: var(--pink-500);
  color: white;
}


.button.wide {
  width: min(100%, 520px);
}

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

.button.primary:hover {
  background: #ff7bb1;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 79, 154, 0.1);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
  gap: 24px;
}

.logo img {
  height: 50px;
}

.main-nav {
  display: flex;
  flex-wrap: wrap;
  margin: 0;
  gap: 16px;
  font-weight: 600;
  color: var(--ink-700);
}

.main-nav a {
  transition: color 0.2s ease;
}

.main-nav a:hover {
  color: var(--pink-700);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: none;
  border-radius: 10px;
  background: transparent;
  padding: 0;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 6px;
}

.hamburger-line {
  width: 20px;
  height: 3px;
  background: #7d7d7d;
  border-radius: 2px;
}

.hero-slider {
  position: relative;
  height: clamp(280px, 52vw, 460px);
  overflow: hidden;
}

.hero-slide {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  color: #000;
  padding: 48px 0;
  background-size: cover;
  background-position: center;
}

.hero-slide-a {
  background-image: url("/img/topimage02_2026.jpg");
}

.hero-text h1 {
  font-family: Lato, "Noto Sans JP", "ヒラギノ角ゴ ProN",
    "Hiragino Kaku Gothic ProN", メイリオ, Meiryo, "ＭＳ Ｐゴシック",
    "MS PGothic", sans-serif;
  font-size: clamp(1.53rem, 2.88vw, 2.61rem);
  margin: 0 0 12px;
  text-shadow: 0 0 20px rgba(255, 255, 255, 1), 0 0 42px rgba(255, 255, 255, 1), 0 0 60px rgba(255, 255, 255, 0.92);
}

.hero-text p {
  margin: 10px 0 0;
  font-weight: 700;
  font-size: 1.2em;
  line-height: 1.5;
  text-shadow: 0 0 20px rgba(255, 255, 255, 1), 0 0 42px rgba(255, 255, 255, 1), 0 0 60px rgba(255, 255, 255, 0.92);
}

.two-col {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 32px;
  align-items: center;
}

.two-col.align-start {
  align-items: start;
}

#overview .two-col.align-start {
  align-items: start;
}

#overview .two-col.align-start > div > p {
  margin-top: 0;
}

.three-col {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}

.photo-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: 18px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 79, 154, 0.15);
}

.photo-card figcaption {
  text-align: center;
  font-size: 0.85rem;
  color: var(--ink-500);
  margin-top: 8px;
}

.overview-media {
  display: flex;
  gap: 16px;
  align-items: start;
}

.overview-photo {
  margin: 0;
  flex: 1 1 0;
}

.overview-photo img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.overview-caption {
  margin-top: 8px;
  text-align: right;
  font-size: 0.85rem;
  color: var(--ink-500);
}

.news-list {
  display: grid;
  gap: 20px;
  margin-bottom: 32px;
}

.news-item {
  position: relative;
  padding: 20px;
  border-radius: var(--radius-md);
  background: var(--cream);
  border: 1px solid var(--pink-500);
  transition: transform 0.2s ease;
}

.news-badge-new {
  position: absolute;
  top: 10px;
  right: 10px;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--pink-500);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  line-height: 1.2;
  z-index: 1;
}

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

.news-item h3 {
  margin: 0 0 8px;
  font-size: 1.2rem;
}

.news-item time {
  font-size: 0.85rem;
  color: var(--ink-500);
}

.news-accordion {
  border: none;
}

.news-accordion summary {
  list-style: none;
  cursor: pointer;
}

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

.news-summary {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
}


.news-body {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 79, 154, 0.18);
}

.speaker-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.speaker-card {
  display: grid;
  grid-template-columns: 1fr 120px;
  gap: 16px;
  padding: 20px;
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 79, 154, 0.15);
  box-shadow: 0 18px 38px rgba(141, 20, 81, 0.1);
  align-items: center;
}

.speaker-card img {
  border-radius: 50%;
  width: 110px;
  height: 110px;
  object-fit: cover;
}

.speaker-name {
  font-weight: 700;
  color: var(--pink-700);
}

.speaker-bio {
  font-size: 0.9rem;
  color: var(--ink-600);
}

.map-wrap iframe {
  width: 100%;
  min-height: 320px;
  border-radius: var(--radius-md);
}

.map-wrap {
  align-self: start;
}

.access-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 16px;
  align-self: start;
}

.access-list li {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 16px;
  border: 1px solid transparent;
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.access-mark {
  width: 12px;
  height: 12px;
  margin-top: 9px;
  border-radius: 4px;
  background: var(--pink-500);
}

.site-footer {
  background: transparent;
  color: var(--ink-900);
  font-size: 0.92rem;
  padding: 56px 0 24px;
}

.site-footer h3 {
  margin-top: 0;
}

.site-footer p {
  line-height: 1.5;
}

.archive-list {
  display: grid;
  gap: 16px;
  margin-top: 24px;
}

.archive-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 79, 154, 0.18);
  background: #fff;
  font-weight: 600;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.archive-card:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 79, 154, 0.45);
}

.title-band {
  background: var(--pink-500);
  padding: 26px 16px;
  border-radius: 0;
  border: none;
  margin-bottom: 40px;
  width: 100%;
  color: #fff;
  text-align: center;
  position: relative;
  left: 50%;
  right: 50%;
  margin-left: -50vw;
  margin-right: -50vw;
  width: 100vw;
  display: flex;
  align-items: center;
  justify-content: center;
}

.title-band .section-title {
  margin: 0;
  line-height: 1;
}

.archive-description {
  margin: 40px 0;
}

.info-list {
  margin: 24px 0 0;
}

.info-list dt {
  font-weight: 700;
  margin-top: 26px;
}

.info-list dd {
  margin: 8px 0 0;
  color: var(--ink-700);
  line-height: 1.7;
  margin-bottom: 14px;
}

ol li {
  margin-bottom: 12px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
  align-items: start;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 8px;
}

.site-footer a {
  color: var(--ink-900);
}

.site-footer a:hover {
  color: var(--pink-700);
}

.copyright {
  margin-top: 24px;
  font-size: 0.85rem;
  color: var(--ink-500);
}

@media (max-width: 900px) {
  .header-inner {
    position: relative;
    flex-direction: row;
    align-items: center;
    gap: 12px;
  }

  .nav-toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .main-nav {
    position: absolute;
    top: 100%;
    left: 50%;
    right: auto;
    width: 100vw;
    margin-left: -50vw;
    display: none;
    flex-direction: column;
    gap: 0;
    padding: 0;
    background: #fff;
    border-top: 1px solid rgba(255, 79, 154, 0.2);
    border-bottom: 1px solid rgba(255, 79, 154, 0.2);
    border-left: none;
    border-right: none;
    border-radius: 0;
    box-shadow: 0 18px 38px rgba(141, 20, 81, 0.14);
  }

  .main-nav.is-open {
    display: flex;
  }

  .main-nav a {
    display: block;
    padding: 12px 16px;
  }

  .main-nav a:hover {
    background: var(--pink-100);
  }

  .speaker-card {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .speaker-card img {
    margin: 0 auto;
  }

  .hero-text p {
    font-size: 1.02em;
  }

  .news-item:has(.news-badge-new) .news-summary > div {
    padding-top: 20px;
  }
}