/* =========================================================
   RESET
   ========================================================= */

html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed,
figure, figcaption, footer, header, hgroup,
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
  margin: 0;
  padding: 0;
  border: 0;
  font-size: 100%;
  font: inherit;
  vertical-align: baseline;
  box-sizing: border-box;
}

article, aside, details, figcaption, figure,
footer, header, hgroup, menu, nav, section {
  display: block;
}

ol,
ul {
  list-style: none;
}

blockquote,
q {
  quotes: none;
}

blockquote::before,
blockquote::after,
q::before,
q::after {
  content: "";
}

table {
  border-collapse: collapse;
  border-spacing: 0;
}


/* =========================================================
   BASE
   ========================================================= */

html {
  scroll-behavior: smooth;
}

html,
body {
  width: 100%;
  min-height: 100%;
}

body {
  margin: 0;
  padding: 0;
  background: #ffffff;
  color: #191919;
  line-height: 1;
  letter-spacing: 0.05em;
  font-family:
    HelveticaNeue,
    "Helvetica Neue",
    Helvetica,
    Arial,
    Roboto,
    "Droid Sans",
    "Hiragino Kaku Gothic ProN",
    "メイリオ",
    Meiryo,
    "ＭＳ Ｐゴシック",
    sans-serif;
  -webkit-text-size-adjust: 100%;
}

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

a:visited {
  color: inherit;
}

a:hover {
  color: inherit;
}

img {
  max-width: 100%;
  height: auto;
  vertical-align: bottom;
}

::selection {
  background: #333333;
  color: #ffffff;
}


/* =========================================================
   HERO
   ========================================================= */

.hero {
  position: relative;
  width: 100%;
  min-height: 100vh;
  opacity: 1;
  background-image: url("/pre20260513/img/2027_announcement_bg.jpg");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-inner {
  width: min(86vw, 1180px);
  padding: 120px 24px 80px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: clamp(20px, 3.5vw, 48px);
}

.hero-logo {
  display: block;
  width: min(86vw, 980px);
  height: auto;
}

.hero-date {
  display: block;
  width: min(82vw, 940px);
  height: auto;
}


/* =========================================================
   NAVIGATION
   ABOUT / SPONSOR を画面2分割の中央に配置
   ========================================================= */

nav {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1000;
  width: 100%;
  height: 72px;
  background: rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  font-family: "Roboto", sans-serif;
  font-size: 22px;
  font-weight: 700;
  line-height: 72px;
  letter-spacing: 0.18em;
}

nav ul {
  display: grid;
  grid-template-columns: 1fr 1fr;
  width: 100%;
  height: 72px;
  margin: 0;
  padding: 0;
  list-style: none;
}

nav li {
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

nav a,
nav a:visited {
  color: rgba(255, 255, 255, 0.92);
  text-decoration: none;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.24);
}

nav a:hover {
  color: #ffffff;
  opacity: 1;
}


/* =========================================================
   SCROLL DOWN ARROW
   ========================================================= */

.sd a {
  position: absolute;
  bottom: 36px;
  left: 50%;
  z-index: 2;
  display: inline-block;
  width: 32px;
  height: 72px;
  transform: translateX(-50%);
  text-decoration: none;
}

.sd a span {
  position: absolute;
  left: 50%;
  width: 24px;
  height: 24px;
  margin-left: -12px;
  border-left: 1px solid rgba(43, 43, 43, 0.85);
  border-bottom: 1px solid rgba(43, 43, 43, 0.85);
  transform: rotate(-45deg);
  animation: sdbArrow 2s infinite;
  opacity: 0;
}

.sd a span:nth-of-type(1) {
  top: 0;
  animation-delay: 0s;
}

.sd a span:nth-of-type(2) {
  top: 16px;
  animation-delay: 0.15s;
}

.sd a span:nth-of-type(3) {
  top: 32px;
  animation-delay: 0.3s;
}

@keyframes sdbArrow {
  0% {
    opacity: 0;
  }

  50% {
    opacity: 1;
  }

  100% {
    opacity: 0;
  }
}


/* =========================================================
   COMMON SECTION
   ========================================================= */

article {
  width: 100%;
  margin: 0;
  padding: 96px 0;
  scroll-margin-top: 90px;
}

.wrap {
  width: min(86vw, 960px);
  margin: 0 auto;
  opacity: 1;
  transition: none;
}

#news,
#about,
#sponsor {
  background: #f5f1e8;
}

h1 {
  margin: 0 0 48px;
  color: #eb6650;
  font-family: "Roboto", sans-serif;
  font-size: 32px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.14em;
  text-align: center;
}

p {
  line-height: 1.8;
}


/* =========================================================
   NEWS
   ========================================================= */

.news {
  color: #222222;
  font-size: 15px;
  line-height: 1.8;
}

.news dl {
  display: grid;
  grid-template-columns: 120px 1fr;
  column-gap: 24px;
  width: min(86vw, 720px);
  margin: 0 auto;
}

.news dl + dl {
  margin-top: 5px;
}

.news dt {
  color: #888888;
  font-weight: 400;
  text-align: right;
}

.news dd {
  font-weight: 700;
  text-align: left;
}

.news dd a {
  color: #eb6650;
  font-weight: 700;
  text-decoration: none;
}

.news dd a:hover {
  color: #d85440;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* =========================================================
   ABOUT
   ========================================================= */

#about .wrap {
  width: min(86vw, 940px);
  margin: 0 auto;
}

#about h1 {
  margin: 0 0 48px;
  color: #eb6650;
  font-family: "Roboto", sans-serif;
  font-size: 32px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.14em;
  text-align: center;
}

#about p {
  color: #222222;
  font-size: 16px;
  line-height: 1.35;
  letter-spacing: 0.02em;
  text-align: left;
  margin-bottom: 24px;
}

/* =========================================================
   SPONSOR
   ========================================================= */

#sponsor {
  text-align: center;
}

#sponsor h2 {
  margin: 0 0 24px;
  color: #999999;
  font-family: "Roboto", sans-serif;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.12em;
  text-align: center;
}

.sponsor img {
  max-width: 90%;
  height: auto;
  vertical-align: bottom;
}

.sponsor ul {
  width: min(86vw, 820px);
  margin: 0 auto 60px;
  font-size: 0;
  display: flex;
  justify-content: space-between;
  align-content: space-around;
  flex-wrap: wrap;
}

.sponsor ul.platinum li {
  margin-bottom: 50px;
}

.sponsor ul.gold li {
  width: calc(50% - 20px);
  margin-bottom: 50px;
}

.sponsor ul.silver li {
  width: calc(40% - 20px);
  margin-bottom: 30px;
}

.sponsor ul.copper li,
.sponsor ul.bronze li {
  width: calc(30% - 20px);
  margin-bottom: 30px;
}


/* =========================================================
   BUTTON
   ========================================================= */

.btn a {
  width: 340px;
  height: 70px;
  margin: 60px auto 0;
  background: #555555;
  color: #ffffff;
  font-size: 24px;
  line-height: 70px;
  text-align: center;
  display: block;
  border-radius: 8px;
  box-shadow: 0 1px 1px 0 rgba(0, 0, 0, 0.06);
  transition: all 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.btn a:visited {
  color: #ffffff;
}

.btn a:hover {
  color: #ffffff;
  background: #333333;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  transform: translateY(-1px);
}


/* =========================================================
   FOOTER
   ========================================================= */

footer {
  width: 100%;
  padding: 40px 0;
  font-size: 12px;
  line-height: 1.8;
  text-align: center;
  color: #ffffff;
  background: #757575 url("/img/footer_bg.jpg") no-repeat center top;
  background-size: cover;
}

footer .wrap {
  opacity: 1;
}

footer a,
footer a:visited,
footer a:hover {
  color: #ffffff;
}

footer .btn a {
  margin: 0 auto 40px;
}

footer .logo {
  width: 100px;
  margin: 50px 0;
}

footer .copyright {
  font-size: 10px;
  color: #b4b4b4;
}


/* =========================================================
   RESPONSIVE
   ========================================================= */

@media screen and (max-width: 768px) {
  .hero {
    min-height: 100svh;
  }

  .hero-inner {
    width: 100%;
    padding: 96px 20px 64px;
    gap: 24px;
  }

  .hero-logo {
    width: 92vw;
  }

  .hero-date {
    width: 90vw;
  }

  nav {
    height: 56px;
    font-size: 15px;
    line-height: 56px;
    letter-spacing: 0.14em;
  }

  nav ul {
    height: 56px;
  }

  article {
    padding: 64px 0;
    scroll-margin-top: 70px;
  }

  .wrap {
    width: 86vw;
  }

  h1 {
    margin-bottom: 32px;
    font-size: 24px;
  }

  #about p {
    font-size: 14px;
    line-height: 1.8;
    text-align: left;
  }

  .news {
    font-size: 12px;
  }

.news dl {
  display: grid;
  grid-template-columns: 84px 1fr;
  column-gap: 12px;
  width: 100%;
}

  .btn a {
    width: 250px;
    height: 44px;
    margin-top: 30px;
    font-size: 16px;
    line-height: 44px;
  }

  .sponsor h2 {
    font-size: 12px;
  }

  .sponsor ul {
    width: 100%;
    margin-bottom: 30px;
  }

  .sponsor ul.gold li {
    width: calc(45% - 10px);
  }

  .sponsor ul.silver li,
  .sponsor ul.copper li,
  .sponsor ul.bronze li {
    width: calc(33.3% - 10px);
  }

  footer {
    font-size: 12px;
  }

  footer .logo {
    width: 80px;
  }
}
/* =========================================================
   SPONSOR - ABOUT と同じ本文レイアウト
   ========================================================= */

#sponsor .wrap {
  width: min(86vw, 940px);
  margin: 0 auto;
}

#sponsor h1 {
  margin: 0 0 48px;
  color: #eb6650;
  font-family: "Roboto", sans-serif;
  font-size: 32px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.14em;
  text-align: center;
}

#sponsor p {
  color: #222222;
  font-size: 16px;
  line-height: 1.35;
  letter-spacing: 0.02em;
  text-align: left;
  margin-bottom: 20px;
}
#sponsor p a,
#sponsor p a:visited {
  color: #8f3a32;
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
}

#sponsor p a:hover {
  color: #b84a3e;
}