/* ---------------------------------------------
   Tokens
--------------------------------------------- */
:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f7f7f8;
  --color-text: #1c1c1e;
  --color-text-muted: #6b6b70;
  --color-primary: #d11a2a;
  --color-primary-dark: #c93529;
  --color-accent-yellow: #f6c445;
  --color-accent-pink: #f8b4c4;
  --color-border: #e0e0e0;
  --color-card-bg: #ffffff;

  --font-label: "Jost", sans-serif;
  --font-head: "Jost", YakuHanJP, "Noto Sans JP", sans-serif;
  --font-body: YakuHanJP, "Noto Sans JP", sans-serif;
  --font-mono: "Source Code Pro", monospace;

  --container-width: 1180px;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;
}

/* ---------------------------------------------
   Reset / base
--------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, p, dl, dd, ul, figure {
  margin: 0;
}

ul {
  list-style: none;
  padding: 0;
}

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

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

.container {
  width: 100%;
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: 56px;
}

section {
  scroll-margin-top: 88px;
}

/* ---------------------------------------------
   Shared components
--------------------------------------------- */
.section-label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-label);
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.12rem;
  font-size: 1rem;
  line-height: 1.445;
  margin-bottom: 8px;
}

.section-label::before {
  content: "";
  display: inline-block;
  flex-shrink: 0;
  width: 22px;
  height: 2px;
  background: var(--color-primary);
}

.section-title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 3rem;
  line-height: 3.245rem;
  letter-spacing: -0.0275rem;
  color: #161616;
  margin-bottom: 16px;
}

.section-lead {
  font-size: 1rem;
  line-height: 1.965625rem;
  color: #4d4d4d;
  margin-bottom: 40px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-head);
  font-weight: 700;
  border: none;
  border-radius: var(--radius-pill);
  padding: 14px 28px;
  cursor: pointer;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.btn:hover {
  opacity: 0.85;
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
}

.btn--sm {
  padding: 8px 20px;
  font-size: 0.875rem;
}

.btn--block {
  width: 100%;
}

.badge {
  display: inline-block;
  align-self: flex-start;
  font-family: var(--font-label);
  font-weight: 700;
  font-size: 0.6875rem;
  line-height: 1rem;
  letter-spacing: 0.08em;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  margin-bottom: 16px;
}

.badge--primary {
  background: var(--color-primary);
  color: #fff;
}

.badge--soft {
  background: rgba(209, 26, 42, 0.12);
  color: var(--color-primary);
}

.badge--neutral {
  background: #f1f1f2;
  color: #8c8c8c;
}

/* ---------------------------------------------
   Header
--------------------------------------------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: #F9F9FBB8;
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-block: 14px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}

.brand__text {
  font-family: var(--font-label), var(--font-head);
  font-weight: 700;
  font-size: 1.0625rem;
  line-height: 1.275rem;
  letter-spacing: -0.0106rem;
  color: #161616;
}

.brand__num {
  color: var(--color-primary);
  font-size: 1.125rem;
  line-height: 1.35rem;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
  font-weight: 600;
  font-size: 0.84375rem;
}

.site-nav__list a {
  display: block;
  padding: 9px 12px 8px;
  border-radius: var(--radius-sm);
  color: #4d4d4d;
}

.site-nav__list li.list__inactive a {
  opacity: 0.5;
}

.site-nav__list a:hover {
  color: var(--color-primary);
}

.site-header__cta {
  flex-shrink: 0;
}

/* ---------------------------------------------
   Hero
--------------------------------------------- */
.hero {
  position: relative;
  overflow: hidden;
  height: calc(100vw * 849 / 1441.45);
  max-height: 100svh;
  background: var(--color-bg);
}

.hero__inner {
  position: absolute;
  z-index: 4;
  left: 41.08%;
  top: 23.85%;
}

.hero__title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 8.5281rem;
  line-height: 7.8458rem;
  letter-spacing: -0.2985rem;
  color: #161616;
}

.hero__num {
  color: #d11a2a;
  font-family: var(--font-label);
  font-weight: 700;
  font-size: 6.5125rem;
  line-height: 5.9894rem;
  letter-spacing: -0.3675rem;
  margin-top: 0.681rem;
}

.hero__date {
  margin-top: 24px;
  font-family: var(--font-label);
  font-weight: 600;
  font-size: 3.625rem;
  line-height: 1.2;
  letter-spacing: -0.03625rem;
  color: #161616;
}

.hero__decor {
  position: absolute;
  inset: 0;
  z-index: 2;
  width: 100%;
  height: 100%;
}

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

.hero__ruby {
  position: absolute;
  z-index: 1;
  left: 54.8%;
  top: 3.2%;
  width: 32.9%;
  height: auto;
}

.hero__tanabata {
  position: absolute;
  z-index: 3;
  left: 7%;
  top: 6.6%;
  width: 35.7%;
  height: auto;
}

.hero__scroll {
  position: absolute;
  z-index: 4;
  left: 50%;
  bottom: 16px;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.625rem;
  line-height: 0.905rem;
  letter-spacing: 0.1375rem;
  color: #8c8c8c;
}

.hero__scroll-line {
  width: 1px;
  height: 32px;
  background: linear-gradient(to bottom, #8c8c8c 0%, transparent 100%);
}

/* ---------------------------------------------
   Theme
--------------------------------------------- */
.theme {
  padding-block: 80px;
  text-align: center;
}

.theme .section-label {
  justify-content: center;
  margin-inline: auto;
}

.theme .section-label::before {
  content: none;
}

.theme__title {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 3rem;
  line-height: 1.4;
  letter-spacing: -0.0275rem;
  color: #161616;
  margin-bottom: 16px;
}

.theme__text {
  max-width: 640px;
  margin-inline: auto;
  font-size: 1.125rem;
  line-height: 1.9656rem;
  color: #4d4d4d;
}

/* ---------------------------------------------
   News
--------------------------------------------- */
.news {
  padding-block: 80px;
  background: var(--color-bg-alt);
}

.news-list {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 54px;
}

.news-list li {
  display: flex;
  gap: 8px;
  font-size: 1rem;
  line-height: 1.4;
  color: #000;
}

.news-list li a {
  font-weight: 600;
  text-decoration: underline;
}

.news-list time {
  font-family: var(--font-label);
  font-weight: 400;
  flex-shrink: 0;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px 28px 28px;
  display: flex;
  flex-direction: column;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.1);
}

.card--primary {
  border-color: var(--color-primary);
}

.card--inactive {
  opacity: 0.6;
}

.card__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.75rem;
  line-height: 1.4;
  color: #161616;
  margin-bottom: 4px;
}

.card__title-en {
  display: inline-block;
  margin-top: 4px;
  font-size: 0.8125rem;
  line-height: 1.177rem;
  letter-spacing: 0.02em;
  font-weight: 700;
  color: var(--color-primary);
}

.card__text {
  color: #4d4d4d;
  font-size: 0.875rem;
  line-height: 1.8;
  flex-grow: 1;
}

.card__meta {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  align-self: flex-start;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-primary);
  background: rgba(209, 26, 42, 0.05);
  border: 1px solid #dba1a6;
  border-radius: 10px;
  padding: 9px 14px;
  margin-block: 20px;
}

.card__meta span {
  font-family: var(--font-label);
  font-weight: 400;
  color: #4d4d4d;
}

.card__footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 20px;
}

.card__status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-weight: 800;
  font-size: 0.8125rem;
  color: #8c8c8c;
}

.card__status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-primary);
}

.card__cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 20px;
}

.card__cta--active span:first-child {
  font-weight: 800;
  font-size: 0.8125rem;
  color: var(--color-primary);
}

.card__cta-circle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--color-primary);
}

.card__cta-circle--outline {
  background: none;
  border: 1px solid var(--color-border);
}

/* ---------------------------------------------
   Speakers
--------------------------------------------- */
.speakers {
  padding-block: 80px;
}

#speakers .section-lead {
  line-height: 1.6;
}

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

.speaker-card {
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  gap: 16px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 30px 26px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.1);
}

.speaker-card__heart {
  position: absolute;
  top: -17px;
  right: -15px;
  width: 78px;
  height: 78px;
  opacity: 0.12;
}

.speaker-card__label {
  font-family: var(--font-label);
  font-weight: 700;
  color: var(--color-primary);
  font-size: 1rem;
  line-height: 1.445rem;
  letter-spacing: 0.12em;
  margin-bottom: 8px;
}

.speaker-card__photo {
  flex-shrink: 0;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: rgba(209, 26, 42, 0.12);
  object-fit: cover;
}

.speaker-card__body {
  min-width: 0;
}

.speaker-card__name {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 2rem;
  line-height: 1.4;
  color: #161616;
}

.speaker-card__handle {
  display: block;
  color: #4d4d4d;
  font-size: 1rem;
  line-height: 1.4;
  margin-block: 4px 8px;
}

.speaker-card__handle:hover {
  color: var(--color-primary);
}

.speaker-card__note {
  font-size: 1.125rem;
  line-height: 1.4;
  color: #4d4d4d;
}

/* ---------------------------------------------
   Overview / Access
--------------------------------------------- */
.overview {
  padding-block: 80px;
  background: var(--color-bg-alt);
}

#overview .section-label {
  font-size: 0.75rem;
}

#overview .section-title {
  line-height: 1.4;
}

.overview__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: stretch;
}

.overview-list {
  border-top: 2px solid #161616;
}

.overview-list__item {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 18px;
  padding: 22px 4px;
  border-bottom: 1px solid var(--color-border);
  align-items: baseline;
}

.overview-list__item dt {
  display: flex;
  align-items: center;
  gap: 9px;
  font-weight: 800;
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  color: #4d4d4d;
}

.overview-list__item dd {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.25rem;
  line-height: 1.5;
  color: #161616;
}

.overview-list__sub {
  display: block;
  font-weight: 600;
  font-size: 0.8125rem;
  line-height: 1.5;
  color: #8c8c8c;
  margin-top: 4px;
}

.overview-list__icon {
  width: 17px;
  height: 17px;
  flex-shrink: 0;
}

.overview__map {
  border: 1px solid var(--color-border);
  border-radius: 22px;
  overflow: hidden;
  min-height: 320px;
  background: #fff;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.1);
}

.overview__map iframe {
  width: 100%;
  height: 100%;
  min-height: 320px;
  border: 0;
}

/* ---------------------------------------------
   Sponsors
--------------------------------------------- */
.sponsors {
  padding-block: 80px;
}

#sponsors .section-label {
  font-size: 0.75rem;
}

#sponsors .section-lead {
  font-size: 0.875rem;
  line-height: 1.8;
}

.sponsors-deadline {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  width: 350px;
  background: #fcf1f2;
  border: 1px solid #da959b;
  border-radius: 14px;
  padding: 16px 20px;
  margin-bottom: 48px;
}

.sponsors-deadline__header {
  display: flex;
  align-items: center;
  gap: 9px;
}

.sponsors-deadline__label {
  font-weight: 800;
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  color: #4d4d4d;
}

.sponsors-deadline__date {
  font-family: var(--font-label);
  font-weight: 900;
  color: var(--color-primary);
  font-size: 1.25rem;
}

.sponsors-deadline__date-day {
  font-size: 0.875rem;
}

.sponsor-tier {
  margin-bottom: 40px;
}

.sponsor-tier__heading {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 24px;
}

.sponsor-tier__label {
  flex-shrink: 0;
  font-family: var(--font-label);
  font-weight: 800;
  letter-spacing: 0.14em;
  font-size: 0.875rem;
  border-radius: var(--radius-pill);
  padding: 9.5px 18.5px;
}

.sponsor-tier__label--gold {
  color: #c8a23a;
  background: rgba(200, 162, 58, 0.1);
  border: 1px solid #c8a23a;
}

.sponsor-tier__label--silver {
  color: #8c93a0;
  background: rgba(140, 147, 160, 0.1);
  border: 1px solid #8c93a0;
}

.sponsor-tier__divider {
  flex-grow: 1;
  height: 1px;
  background: var(--color-border);
}

.sponsor-tier__logos {
  display: grid;
  gap: 20px;
}

.sponsor-tier__logos--gold {
  grid-template-columns: repeat(2, 1fr);
}

.sponsor-tier__logos--silver {
  grid-template-columns: repeat(3, 1fr);
}

.sponsor-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 128.5px;
  border: 1px solid #c9c9cf;
  border-radius: 14px;
  color: #8c8c8c;
  font-family: var(--font-label);
  font-weight: 600;
  font-size: 0.9375rem;
  background: rgba(20, 20, 24, 0.02);
}

.sponsor-logo--gold {
  min-height: 180.5px;
  font-size: 1.0625rem;
}

.sponsors-cta-group {
  display: flex;
  gap: 16px;
  justify-content: center;
}

.sponsors-cta {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 350px;
  height: 53px;
  padding-inline: 1em;
  background: var(--color-primary);
  border-radius: 10px;
  box-shadow: 0 4px 4px rgba(0, 0, 0, 0.25);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.9375rem;
  line-height: 1.448;
  color: #fff;
  cursor: pointer;
  transition: opacity 0.2s ease;
}

.sponsors-cta img {
  position: absolute;
  right: 1em;
}

.sponsors-cta::before {
  content: '';
  width: 0;
  flex-shrink: 0;
}

.sponsors-cta:hover {
  opacity: 0.85;
}

/* ---------------------------------------------
   Footer
--------------------------------------------- */
.site-footer {
  background: #f9f9fb;
  padding-block: 72px 36px;
  text-align: center;
}

.site-footer__inner {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
  gap: 8px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-border);
}

.site-footer__label {
  font-weight: 700;
  font-size: 0.75rem;
  letter-spacing: 0.075rem;
  color: #8c8c8c;
}

.site-footer__name {
  font-family: var(--font-body);
  font-weight: 900;
  font-size: 1.625rem;
  line-height: 1.45;
  color: #161616;
  margin-bottom: 16px;
}

.site-footer__link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border: 1px solid #c9c9cf;
  border-radius: 10px;
  padding: 10px 15px 9px;
  font-weight: 700;
  font-size: 0.8125rem;
  color: #161616;
}

.site-footer__copyright {
  margin-top: 24px;
  font-size: 0.75rem;
  color: #8c8c8c;
}

/* ---------------------------------------------
   Mobile-only elements (hidden on PC by default)
--------------------------------------------- */
.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 11px;
  margin: -11px -11px -11px 0;
}

.nav-toggle__bar {
  display: block;
  width: 22px;
  height: 2px;
  background: #161616;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  z-index: 99;
  background: #F9F9FB;
  border-bottom: 1px solid var(--color-border);
}


/* ---------------------------------------------
   Policy page
--------------------------------------------- */
.policy-main {
  padding-top: 80px;
  padding-bottom: 96px;
}

.policy-header {
  padding-block: 56px 40px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 48px;
}

.policy-title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 2rem;
  line-height: 1.3;
  color: #161616;
  margin-top: 8px;
}

.policy-content {
  max-width: 760px;
}

.policy-body {
  line-height: 1.9;
}

.policy-body > * + * {
  margin-top: 1.25em;
}

.policy-body h2 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.125rem;
  color: #161616;
  margin-top: 2.5em;
  padding-bottom: 0.5em;
  border-bottom: 1px solid var(--color-border);
}

.policy-body ul {
  padding-left: 1.5em;
  list-style-type: disc;
}

.policy-body li + li {
  margin-top: 0.5em;
}

.policy-body a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.policy-body time {
  font-family: var(--font-label);
  font-variant-numeric: tabular-nums;
}

/* ---------------------------------------------
   Responsive: Tablet / Narrow desktop (≤1200px)
--------------------------------------------- */
@media (max-width: 1200px) {
  .hero__title {
    font-size: 6.4rem;
    line-height: 5.9rem;
    letter-spacing: -0.224rem;
  }
  .hero__num {
    font-size: 4.9rem;
    line-height: 4.5rem;
    letter-spacing: -0.276rem;
    margin-top: 0.5rem;
  }
  .hero__date {
    font-size: 2.7rem;
    margin-top: 18px;
  }
}

/* ---------------------------------------------
   Responsive: Narrow tablet (≤950px)
--------------------------------------------- */
@media (max-width: 950px) {
  .hero__title {
    font-size: 4.8rem;
    line-height: 4.4rem;
    letter-spacing: -0.168rem;
  }
  .hero__num {
    font-size: 3.7rem;
    line-height: 3.4rem;
    letter-spacing: -0.207rem;
    margin-top: 0.4rem;
  }
  .hero__date {
    font-size: 2rem;
    margin-top: 12px;
  }
}

/* ---------------------------------------------
   Responsive: Header switch (≤1024px)
--------------------------------------------- */
@media (max-width: 1024px) {
  /* Cards */
  .cards {
    grid-template-columns: repeat(2, 1fr);
  }
  .speaker-cards {
    grid-template-columns: 1fr;
  }
  .overview__inner {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  /* Sponsors */
  .sponsors-deadline {
    width: 100%;
  }
  .sponsors-cta-group {
    flex-direction: column;
  }
  .sponsors-cta {
    width: 100%;
  }

  /* Header */
  .site-header__inner {
    padding-block: 22px;
  }
  .site-header:has(.nav-toggle[aria-expanded="true"]) {
    background: #F9F9FB;
    backdrop-filter: none;
  }
  .brand__text {
    font-weight: 900;
  }
  .site-nav {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
    opacity: 0;
  }
  .nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  /* Mobile menu */
  .mobile-menu:not([aria-hidden="true"]) {
    display: block;
  }
  .mobile-menu__list {
    list-style: none;
    display: block;
    width: 100%;
    margin: 0;
    padding: 0;
    padding-top: 12px;
    padding-bottom: 24px;
  }
  .mobile-menu__item {
    position: relative;
    display: block;
    margin: 0;
    padding: 0;
  }
  .mobile-menu__item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 20px;
    right: 20px;
    height: 1px;
    background: var(--color-border);
  }
  .mobile-menu__item a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 17px 20px 16px;
    font-family: var(--font-body);
    font-weight: 700;
    font-size: 1.0625rem;
    color: #161616;
    text-decoration: none;
  }
  .mobile-menu__item a img {
    opacity: 0.4;
    flex-shrink: 0;
  }
}

/* ---------------------------------------------
   Responsive: Mobile (≤768px)
--------------------------------------------- */
@media (max-width: 768px) {
  /* Layout */
  .container {
    padding-inline: 20px;
  }

  /* Section label */
  .section-label {
    font-size: 0.75rem;
  }
  .speakers .section-label {
    font-size: 1rem;
  }

  /* Section title */
  .section-title {
    font-size: 1.75rem;
  }

  /* Hero */
  .hero {
    height: calc(100vw * 842 / 390);
    max-height: 100svh;
  }
  .hero__ruby {
    left: 50%;
    top: 12%;
    width: 65%;
  }
  .hero__tanabata {
    left: 0;
    top: 10%;
    width: 75%;
  }
  .hero__inner {
    left: 50%;
    top: 50%;
    width: 100%;
    transform: translate(-50%, -50%);
    text-align: center;
  }
  .hero__title {
    font-size: 4.2125rem;
    line-height: 4.636rem;
    letter-spacing: -0.1475rem;
  }
  .hero__num {
    font-size: 2.25rem;
    line-height: 2.0625rem;
    letter-spacing: -0.127rem;
    margin-top: 1.065rem;
  }
  .hero__date {
    margin-top: 1em;
    font-size: 1.875rem;
    line-height: 2.25rem;
    letter-spacing: -0.01875rem;
  }
  .hero__date-suffix {
    font-size: 1.5rem;
  }

  /* Theme */
  .theme {
    padding-block: 40px 80px;
  }
  .theme__title {
    font-size: 1.75rem;
  }
  .theme__text {
    text-align: left;
  }

  /* News */
  .news {
    padding-block: 40px 80px;
  }
  .news-list {
    margin-bottom: 20px;
    padding: 16px;
  }

  .news-list li {
    font-size: 0.8125rem;
  }
  .cards {
    grid-template-columns: 1fr;
  }
  .card__meta {
    width: 100%;
  }

  /* Speakers */
  .speakers {
    padding-block: 40px 80px;
  }
  .speaker-cards {
    grid-template-columns: 1fr;
  }
  .speaker-card__label {
    font-size: 0.8125rem;
    letter-spacing: 0.06em;
  }
  .speaker-card__photo {
    width: 80px;
    height: 80px;
  }
  .speaker-card__name {
    font-size: 1.5rem;
  }

  /* Overview */
  .overview {
    padding-block: 40px;
  }
  .overview__inner {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .overview-list__item {
    grid-template-columns: 1fr;
    gap: 6px;
  }
  .overview__map {
    min-height: 253px;
  }
  .overview__map iframe {
    min-height: 253px;
  }

  /* Sponsors */
  .sponsors {
    padding-block: 72px;
  }

  /* Footer */
  .site-footer {
    padding-block: 48px 36px;
  }
  .site-footer__name {
    font-size: 1.125rem;
  }

  /* Policy page */
  .policy-main {
    padding-top: 64px;
  }
  .policy-header {
    padding-block: 32px 24px;
  }
  .policy-title {
    font-size: 1.5rem;
  }
}