@charset "utf-8";

:root {
  /* Brand colors */
  --color-primary: #0C0159;   /* dark navy: text, borders, backgrounds */
  --color-accent:  #FF4F9D;   /* brand pink: highlights, CTAs */
  --color-sky:     #62D7FF;   /* sky blue: section backgrounds */
  --color-white:   #FFFFFF;

  /* Shadows */
  --shadow-flat: 2px 2px 0 0 rgba(0, 0, 0, 0.4);

  /* Border radii */
  --radius-section: 40px 40px 0 0;  /* stacked-section top corners */
  --radius-card:    10px;            /* cards, buttons, FAQ items */

  /* Section stacking */
  --section-stack-offset: -40px;

  /* Background scrolling animations */
  --bg-scroll-distance: 1920px;
}

html,
body {
  background-color: var(--color-sky);
  margin: 0;
  padding: 0;
}

html {
  font-family: "Noto Sans JP", sans-serif;
  font-size: 14px;
  scroll-behavior: smooth;
  scroll-padding-top: 50px;
}

button {
  all: unset;
  display: inline-block;
}

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

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.br-desktop-only {
  display: none;
}

@media (min-width: 1080px) {
  .br-tablet-only {
    display: none;
  }

  .br-desktop-only {
    display: inline;
  }
}


.section-title {
  margin-bottom: 0;
  margin-top: 0;
}

.header {
  align-items: center;
  background-color: var(--color-white);
  display: flex;
  width: 100%;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 2;
}

.header__logo {
  flex-grow: 1;
  padding-bottom: 5px;
  padding-left: 18px;
  padding-right: 18px;
  padding-top: 5px;
}

.header .header__x-share-button {
  box-shadow: none;
  font-size: 12px;
  padding: 8px 15px;
}

.header .header__x-share-button:hover,
.header .header__x-share-button:focus-visible {
  box-shadow: var(--shadow-flat);
}

.header__hamburger,
.hamburger-closer {
  cursor: pointer;
}

.header__hamburger {
  padding: 8px 3px 3px 3px;
}

.nav-list-container {
  position: fixed;
  inset: 0;
  box-sizing: border-box;
  background-color: var(--color-white);
  z-index: 999;
}

.js-enabled .nav-list-container {
  max-height: 0;
  opacity: 0;
  overflow-x: hidden;
  overflow-y: hidden;
  pointer-events: none;
  transition: max-height 0.35s ease-out, opacity 0.2s ease-out;
}

.js-enabled .nav-list-container.is-open {
  max-height: 100vh;
  max-height: 100dvh;
  opacity: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  pointer-events: auto;
}

.nav-list-container__background {
  background-color: var(--color-white);
  background-image: url(../images/bg.webp);
  box-sizing: border-box;
  width: 100%;
  position: relative;
}

.nav-list-container__background > .background-clouds,
.nav-list-container__background > .background-title {
  z-index: 0;
  pointer-events: none;
}

.nav-list-container .hamburger-closer-container,
.nav-list-container .nav-list,
.nav-list-container .x-share-button {
  position: relative;
  z-index: 1;
}

.hamburger-closer-container {
  display: flex;
  justify-content: flex-end;
}

.hamburger-closer {
  padding: 14px 10px;
}

.nav-list-container .nav-list,
.nav-list-container .x-share-button {
  margin-left: auto;
  margin-right: auto;
}

.x-share-button {
  align-items: center;
  background-color: var(--color-accent);
  border-radius: 49px;
  box-shadow: var(--shadow-flat);
  color: var(--color-white);
  display: flex;
  gap: 3px;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
  padding-bottom: 18px;
  padding-top: 19px;
  text-align: center;
  text-decoration: none;
  max-width: 268px;
}

.x-share-button:hover,
.x-share-button:focus-visible {
  background-color: var(--color-white);
  color: var(--color-accent);
}

.header .background-clouds,
.header .background-title {
  display: block;
  position: absolute;
  width: 100%;
}

.background-clouds {
  background-image: url(../images/bg-cloud.svg);
  background-size: auto 100%;
  top: 50px;
  left: 0;
  height: 220px;
  animation: clouds-scroll-right calc(40s * 220 * 1730 / (283 * 1920)) linear infinite;
  will-change: background-position;
  /* tile width at height 220px: 220 × (1730 ÷ 283) ≈ 1345px */
  --bg-scroll-distance: calc(220px * 1730 / 283);
}

.background-title {
  background-image: url(../images/bg-text.svg);
  background-size: auto 100%;
  left: 0;
  height: 70px;
  top: calc(100vh - 200px);
  animation: title-scroll-left calc(40s * 1104 / 1920) linear infinite;
  will-change: background-position;
  /* tile width at height 70px: bg-text.svg natural width 1104px */
  --bg-scroll-distance: 1104px;
}

.background-sky {
  display: none;
}

@media (min-width: 601px) {
  .background-sky {
    background-color: var(--color-white);
    background-image: url(../images/bg.webp);
    background-position: top center;
    background-repeat: repeat-x;
    display: block;
    position: fixed;
    inset: 0;
  }
}

.main-container {
  display: flex;
  padding-top: 50px;
  position: relative;
  max-width: 1920px;
  margin-left: auto;
  margin-right: auto;
}

@media (min-width: 768px) {
  .main-container {
    padding-top: 80px;
  }

  .left-side-column,
  .right-side-column {
    margin-top: -80px;
    padding-top: 80px;
  }

  .key-visual,
  .center-column {
    border-radius: var(--radius-section);
  }
}

.left-side-column,
.right-side-column,
.background-clouds,
.background-title {
  display: none;
}

.center-column {
  background-color: var(--color-white);
  container-type: inline-size;
  filter: drop-shadow(0 0 40px rgba(33, 86, 136, 0.50));
  margin-left: auto;
  margin-right: auto;
  max-width: 600px;
  width: 100%;
  z-index: 1;
}

@media (min-width: 1080px) {
  html {
    scroll-padding-top: 0;
  }

  .main-container {
    --desktop-cloud-top: 24px;
    --desktop-title-bottom: 24px;
    background-attachment: fixed;
    background-position: top center;
    min-height: 100vh;
  }

  .header {
    display: none;
  }

  .left-side-column,
  .right-side-column {
    box-sizing: border-box;
    align-self: flex-start;
    display: block;
    flex-shrink: 0;
    position: sticky;
    top: 0;
    z-index: 1;
  }

  /* Fluid widths: linear interpolation between 1080px and 1920px breakpoints.
     Left:   350px @ 1080px → 872px @ 1920px  (slope = 522/840 ≈ 62.1429vw)
     Right:  230px @ 1080px → 448px @ 1920px  (slope = 218/840 ≈ 25.9524vw)
     Center: takes remaining space via flex:1  (500px @ 1080px, 600px @ 1920px) */
  .left-side-column {
    padding-top: min(calc(50vh - 135px), 285px);
    width: clamp(350px, calc(62.1429vw - 321.143px), 872px);
  }

  .right-side-column {
    padding-top: min(calc(50vh - 250px), 201px);
    padding-right: 30px;
    padding-left: 30px;
    width: clamp(230px, calc(25.9524vw - 50.2857px), 448px);
  }

  .center-column {
    box-sizing: border-box;
    flex: 1;
    margin-left: 0;
    max-width: 600px;
    min-width: 0;
    padding-left: 0;
  }

  .background-clouds,
  .background-title {
    background-position: top left;
    background-repeat: repeat-x;
    display: block;
    position: fixed;
    width: 100%;
    z-index: 0;
  }

  .background-clouds {
    top: var(--desktop-cloud-top);
  }

  .background-title {
    bottom: var(--desktop-title-bottom);
    top: auto;
  }
}

@keyframes clouds-scroll-right {
  from {
    background-position: 0 0;
  }

  to {
    background-position: var(--bg-scroll-distance) 0;
  }
}

@keyframes title-scroll-left {
  from {
    background-position: 0 0;
  }

  to {
    background-position: calc(var(--bg-scroll-distance) * -1) 0;
  }
}

.left-logo {
  max-width: 82%;
  margin-left: auto;
  margin-right: auto;
}

.main-description {
  background-image: url(../images/caption-right.svg),
    url(../images/caption-left.svg);
  background-position: top 16px left calc(50% + 155px), bottom 10px left calc(50% - 155px);
  background-repeat: no-repeat;
  background-size: 25px 49px,
    28px 32px;
  color: var(--color-primary);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.9;
  text-align: center;
  padding-bottom: 20px;
  padding-left: 24px;
  padding-right: 24px;
  padding-top: 30px;
}

@media (min-width: 1080px) {
  .main-description {
    background-position: top 16px left calc(50% + 195px), bottom 10px left calc(50% - 155px);
  }
}

.main-description > p {
  margin: 0;
}

.sundayfes-text {
  color: var(--color-accent);
}

.section {
  padding-bottom: 40px;
  padding-top: 26px;
}

.section-about {
  background-image: url(../images/between-gradation.svg);
  background-position: bottom center;
  background-repeat: repeat-x;
  background-size: auto 80px;
  padding-bottom: 80px;
}

.event-info {
  margin-top: 15px;
}

.event-info__date {
  font-size: 20px;
  font-weight: 700;
  line-height: 1.2;
}

.event-info__free {
  color: var(--color-accent);
}

.event-info__note {
  display: block;
  font-size: 14px;
  font-weight: 500;
  line-height: 1.7;
  margin-bottom: 0;
  margin-top: 10px;
}

@media (min-width: 1080px) {
  .event-info__note {
    font-size: 18px;
  }
}

.exhibition-info {
  font-size: 14px;
  font-weight: 500;
  line-height: 1.8;
}

.exhibition-info > dd {
  margin-left: 0;
}

.exhibition-info__title {
  display: inline-block;
  font-weight: 700;
  padding-left: 5px;
  padding-right: 5px;
}

@media (min-width: 1080px) {
  .sundayfes-info.event-info > dt {
    font-size: 20px;
  }

  .sundayfes-info .event-info__date {
    font-size: 22px;
  }

  .exhibition-info {
    font-size: 18px;
  }
}


.img-sparkle {
  display: inline-block;
  vertical-align: middle;
}

.exhibition-info > dt:not(:first-child) {
  margin-top: 6px;
}

.section-event {
  background-color: var(--color-sky);
  padding-top: 33px;
  padding-bottom: 80px;
  border-radius: var(--radius-section);
  margin-top: var(--section-stack-offset);
}

.event-description {
  box-sizing: border-box;
  color: var(--color-primary);
  font-size: 16px;
  font-weight: 500;
  line-height: 1.7;
  text-align: center;
  margin-bottom: 15px;
  margin-left: auto;
  margin-right: auto;
  margin-top: 15px;
  padding-left: 15px;
  padding-right: 15px;
}

@container (width <= 530px) {
  .event-description .br-tablet-only {
    display: inline;
  }

  .event-description .br-desktop-only {
    display: none;
  }
}

.ticket-link-container {
  margin-top: 30px;
  position: relative;
}

.button {
  background-color: var(--color-white);
  border: 2px solid var(--color-primary);
  box-shadow: 0 2px 0 0 var(--color-primary);
  border-radius: var(--radius-card);
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  font-size: 16px;
  font-weight: 700;
  margin-left: auto;
  margin-right: auto;
  max-width: 400px;
  padding: 18px;
  text-align: center;
  text-decoration: none;
  width: 91.46666667%;
}

.button:hover:not(.disabled-button),
.button:focus-visible:not(.disabled-button) {
  background-color: var(--color-primary);
  text-decoration: none;
}

.button__text {
  color: var(--color-primary);
}

.button__icon {
  display: inline-grid;
  flex: none;
  height: 14px;
  place-items: center;
  width: 14px;
}

.button__icon > img {
  grid-area: 1 / 1;
  transition: opacity 0.2s ease-out;
}

.button__icon-hover {
  opacity: 0;
}

.button:hover:not(.disabled-button) .button__text,
.button:focus-visible:not(.disabled-button) .button__text {
  color: var(--color-white);
}

.button:hover:not(.disabled-button) .button__icon-default,
.button:focus-visible:not(.disabled-button) .button__icon-default {
  opacity: 0;
}

.button:hover:not(.disabled-button) .button__icon-hover,
.button:focus-visible:not(.disabled-button) .button__icon-hover {
  opacity: 1;
}

.disabled-button {
  cursor: not-allowed;
  opacity: 0.5;
}

.comming-soon {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
}

@media (min-width: 1080px) {
  .button {
    font-size: 20px;
  }
}

.x-info {
  align-items: center;
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-bottom: 15px;
  margin-left: auto;
  margin-right: auto;
  margin-top: 15px;
  width: 91.46666667%;
}

.x-info__logo {
  width: 40%;
}

@media (min-width: 1080px) {
  .x-info__logo {
    width: 160px;
  }
}

.x-info__text {
  color: var(--color-primary);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.7;
  text-align: center;
}

@media (min-width: 1080px) {
  .x-info__text {
    font-size: 20px;
  }
}

.section-goods {
  background-color: #D1F3FF;
  border-radius: var(--radius-section);
  margin-top: var(--section-stack-offset);
  padding-bottom: 80px;
}

.goods-image-container {
  position: relative;
}

.goods-info-container {
  background: var(--color-primary);
  color: var(--color-white);
  font-size: 24px;
  font-weight: 900;
  line-height: 1;
  padding: 0 5px;
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 328px;
  max-width: 100%;
  text-align: center;
}

.goods-info {
  display: flex;
  justify-content: center;
  margin: 0 auto;
}

.goods-info > span {
  color: var(--color-white);
  font-size: 24px;
  font-weight: 500;
  padding-top: 15px;
}

.goods-info > strong {
  color: #FF9DC8;
  font-size: 38px;
}

.goods-description {
  color: var(--color-primary);
  font-size: 16px;
  font-weight: 500;
  line-height: 1.7;
  text-align: center;
  margin-bottom: 15px;
  margin-left: auto;
  margin-right: auto;
  margin-top: 10px;
}

.section-exhibition {
  background-color: var(--color-sky);
  border-radius: var(--radius-section);
  margin-top: var(--section-stack-offset);
  padding-bottom: 55px;
}

.exhibition-description {
  color: var(--color-primary);
  font-size: 16px;
  font-weight: 500;
  line-height: 1.7;
  text-align: center;
  margin-bottom: 15px;
  margin-left: auto;
  margin-right: auto;
  margin-top: 15px;
  max-width: 320px;
}

.section-faq {
  background-color: var(--color-white);
  border-radius: var(--radius-section);
  margin-top: var(--section-stack-offset);
  padding-bottom: 0;
}

.faq-list {
  line-height: 1.9;
  list-style: none;
  margin-left: auto;
  margin-right: auto;
  margin-top: 28px;
  padding-left: 0;
  width: 82.5%;
}

@media (min-width: 1080px) {
  .faq-list {
    font-size: 18px;
  }
}

.faq-list__item {
  margin-bottom: 15px;
  padding: 15px 20px;
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-card);
}

.faq-list__question-container {
  align-items: center;
  cursor: pointer;
  display: flex;
  gap: 10px;
  text-align: left;
  width: 100%;
}

.faq-list__question-container:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.faq-list__question {
  flex-grow: 1;
  font-weight: 700;
}

.faq-list__question > p {
  margin: 0;
}

.faq-list__answer-toggle {
  align-items: center;
  border-radius: 9999px;
  display: inline-flex;
  justify-content: center;
  min-height: 2.5rem;
  min-width: 2.5rem;
  transition: transform 0.15s ease;
}

.faq-list__answer-toggle.is-flipping {
  animation: faq-toggle-flip 0.15s ease forwards;
}

.faq-list__answer-toggle.is-flipping-reverse {
  animation: faq-toggle-flip-reverse 0.15s ease forwards;
}

@keyframes faq-toggle-flip {
  from { transform: rotate(0deg); }
  to   { transform: rotate(90deg); }
}

@keyframes faq-toggle-flip-reverse {
  from { transform: rotate(0deg); }
  to   { transform: rotate(-90deg); }
}

.faq-list__answer {
  margin-top: 15px;
}

.js-enabled .faq-list__answer {
  overflow: hidden;
  max-height: 0;
  margin-top: 0;
  opacity: 0;
  transition: max-height 0.4s ease, opacity 0.3s ease, margin-top 0.4s ease;
}

.js-enabled .faq-list__answer.is-open {
  max-height: 600px;
  margin-top: 15px;
  opacity: 1;
}

.faq-list__answer > p {
  margin-bottom: 0;
  margin-top: 0;
}

.sundayfes-info {
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-card);
  margin-bottom: 0;
  margin-left: auto;
  margin-right: auto;
  margin-top: 15px;
  overflow: hidden;
  text-align: center;
  width: 82.5%;
}

.sundayfes-info > dt {
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
  padding: 6px;
}

.sundayfes-info > dd {
  font-size: 18px;
  line-height: 1.2;
  margin-left: 0;
  padding-bottom: 16px;
  padding-top: 16px;
}

@media (min-width: 1080px) {
  .sundayfes-info > dt {
    font-size: 20px;
  }

  .sundayfes-info > dd {
    font-size: 22px;
  }
}

.footer {
  padding-bottom: 30px;
  padding-top: 20px;
  text-align: center;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  list-style-type: none;
  gap: 10px 4px;
  margin-bottom: 15px;
  padding-left: 0;
}

.footer-links > li {
  padding-left: 10px;
  padding-right: 10px;
}

.footer-links > li > a {
  display: flex;
  justify-content: center;
  color: var(--color-primary);
  text-decoration: none;
}

.copyright {
  font-size: 10px;
  line-height: 1.25;
  padding-left: 10px;
  padding-right: 10px;
}

@media (min-width: 1080px) {
  .footer-links {
    margin-bottom: 18px;
  }

  .copyright {
    font-size: 12px;
  }
}

.nav-list {
  display: flex;
  flex-direction: column;
  margin-bottom: 35px;
  padding-left: 0;
  list-style: none;
  max-width: 268px;
  margin-left: auto;
  margin-right: auto;
}

.nav-list > li:not(:last-child) {
  margin-bottom: 13.05970149%;
}

.nav-list > li > a:not(.x-share-button) {
  background-image: url(../images/menu-button.svg);
  background-position: center center;
  background-repeat: no-repeat;
  background-size: contain;
  filter: drop-shadow(2px 2px 0 rgba(0, 0, 0, 0.4));
  color: var(--color-white);
  display: block;
  font-size: 20px;
  font-weight: 700;
  padding-bottom: 15px;
  padding-top: 15px;
  text-align: center;
  text-decoration: none;
}

.nav-list > li > .x-share-button {
  margin-left: auto;
  margin-right: auto;
  max-width: 230px;
}

.nav-list > li > a:not(.x-share-button):hover,
.nav-list > li > a:not(.x-share-button):focus-visible {
  background-image: url(../images/menu-button-hover.svg);
  color: var(--color-primary);
}

@media (min-width: 1080px) {
  .description {
    font-size: 20px;
  }
}

.fade-in,
.scale-in {
  opacity: 1;
}

.js-enabled .fade-in {
  opacity: 0;
  transition: opacity 0.6s ease-in;
}

.js-enabled .fade-in.visible {
  opacity: 1;
}

.js-enabled .scale-in {
  opacity: 0;
  transform: scale(0.6);
  transform-origin: center;
  transition: transform 0.35s ease-out, opacity 0.35s ease-out;
}

.js-enabled .scale-in.visible {
  opacity: 1;
  transform: scale(1);
}

@media (prefers-reduced-motion: reduce) {
  .js-enabled .fade-in,
  .js-enabled .scale-in,
  .js-enabled .fadein-left {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .js-enabled .bg-left-anime {
    animation: none;
    clip-path: inset(0);
  }

  .background-clouds,
  .background-title {
    animation: none;
  }

  .faq-list__answer-toggle {
    transition: none;
    animation: none;
  }

  .js-enabled .faq-list__answer {
    transition: none;
  }
}

.js-enabled .bg-left-anime {
  clip-path: inset(0 100% 0 0);
}

.js-enabled .bg-left-anime.on {
  animation: bg-left-anime 0.5s ease-in-out forwards;
}

@keyframes bg-left-anime {
  0% {
    clip-path: inset(0 100% 0 0);
  }

  100% {
    clip-path: inset(0);
  }
}

/* 左フェードイン */
.fadein-left {
  display: block;
  line-height: initial;
}

.js-enabled .fadein-left {
  opacity: 0;
}

.js-enabled .fadein-left.on {
  animation: fadein-left-anime 0.5s 0.5s ease-in-out forwards;
}

@keyframes fadein-left-anime {
  0% {
    transform: translateX(-10px);
    opacity: 0;
  }

  100% {
    transform: translateX(0);
    opacity: 1;
  }
}