:root {
  --bg-color0: #fff;
  --bg-color1: #f5f5f7;
  --bg-color2: #f7f7f7;
  --bg-color3: #edf2f7;
  --accent-red: rgb(255, 45, 85);
  --accent-blue: rgb(0, 122, 255);
  --accent-green: rgb(52, 199, 89);
  --accent-yellow: rgb(255, 204, 0);
  --systemGray1: rgb(142, 142, 147);
  --systemGray2: rgb(174, 174, 178);
  --systemGray3: rgb(199, 199, 204);
  --systemGray4: rgb(209, 209, 214);
  --systemGray5: rgb(229, 229, 234);
  --systemGray6: rgb(242, 242, 247);
}

html {
  font-size: 62.5%;
  height: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  color: #44403f;
  line-height: 1.5;
  font-size: 1.6rem;
  /* font-size: clamp(1.125rem, 2vw, 1.25rem); */
  font-family: SF Pro JP, SF Pro Text, SF Pro Icons, Hiragino Kaku Gothic Pro, ヒラギノ角ゴ Pro W3, メイリオ, Meiryo, ＭＳ Ｐゴシック, Helvetica Neue, Helvetica, Arial, sans-serif;
  background: var(--bg-color3);
  height: 100%;
  font-weight: 400;
  font-style: normal;
}

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

img,
picture,
svg,
video {
  display: block;
  max-width: 100%;
}

a {
  color: var(--accent-blue);
}

a.gmap::before {
  content: "";
  display: inline-block;
  vertical-align: middle;
  width: 20px;
  height: 20px;
  background: url(ic_MapPin.svg) no-repeat center center;
  background-size: contain;
  margin-right: 3px;
}

.hero {
  width: 100%;
  background: url(../img/top2025e.jpg) no-repeat right center;
  background-size: cover;
  height: 520px;
  position: relative;
}

.hero-inner {
  width: 100%;
  max-width: 1200px;
  padding: 30px;
  margin: 20px auto 0;
  border-radius: 4px;
  background: rgba(0, 0, 0, 0);
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
}

@media (max-width: 700px) {
  .hero-inner {
    width: 90%;
    background: rgba(0, 0, 0, 0.4);
  }
}


h1 {
  display: block;
  margin: 0px 0 0 0;
  font-size: clamp(2.5rem, 3.5vw, 3.5rem);
  color: #fff;
  line-height: 1.1;
}

h1 em {
  font-size: clamp(1.5rem, 2.2vw, 2.2rem);
  color: #fff;
  font-style: normal;
  font-weight: normal;
}

h1 span {
  display: block;
  font-size: clamp(1.3rem, 1.8vw, 1.8rem);
  font-weight: normal;
  color: rgba(255, 255, 255, 0.7);
  margin: 1rem 0 0 0;
}

h1 sup {
  font-size: 0.8em;
  vertical-align: super;
  line-height: 0;
}

.hero-inner a {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 5px;
  transition: all 0.3s ease;
}

.hero-inner a:hover {
  color: skyblue;
}

.hero-inner .date {
  font-size: clamp(1.3rem, 1.8vw, 1.8rem);
  display: block;
  margin: 30px 0 0 0;
  font-weight: bold;
  color: rgba(255, 255, 255, 1);
}

.hero-inner .date::before {
  content: "";
  display: inline-block;
  vertical-align: middle;
  width: 24px;
  height: 24px;
  background: url(ic_CalendarDot.svg) no-repeat center center;
  background-size: contain;
  margin-right: 8px;
  filter: brightness(0) invert(1);
}

.hero-inner .date span {
  font-weight: normal;
  color: rgba(255, 255, 255, 0.7);
}

.hero-inner .venue {
  font-size: clamp(1.3rem, 1.8vw, 1.8rem);
  display: block;
  margin: 10px 0 0 0;
  font-weight: bold;
  color: rgba(255, 255, 255, 1);
}

.hero-inner .venue::before {
  content: "";
  display: inline-block;
  vertical-align: middle;
  width: 24px;
  height: 24px;
  background: url(ic_MapPin.svg) no-repeat center center;
  background-size: contain;
  margin-right: 8px;
  filter: brightness(0) invert(1);
}

.hero-inner .venue span {
  font-weight: normal;
  color: rgba(255, 255, 255, 0.7);
}

.hero-inner .address {
  font-size: 1.4rem;
  font-size: clamp(1.3rem, 1.4vw, 1.4rem);
  display: block;
  margin: 10px 0 0 0;
  font-weight: bold;
  color: rgba(255, 255, 255, 1);
}

.hero-inner .address span {
  font-weight: normal;
  color: rgba(255, 255, 255, 0.7);
}

.hero-inner .organizer {
  font-size: clamp(1.3rem, 1.4vw, 1.4rem);
  display: block;
  margin: 10px 0 0px 0;
  font-weight: bold;
  color: rgba(255, 255, 255, 1);
  line-height: 1.3;
  display: block;
}

.hero-inner .organizer span {
  font-weight: normal;
  color: rgba(255, 255, 255, 0.7);
}

.info {
  background: #fff;
  width: 100%;
  text-align: center;
  margin: 0 auto 0;
  padding: 20px;
  box-shadow: rgba(149, 157, 165, 0.2) 0px 8px 24px;
  border-bottom: solid 1px #eee;
}

.info p {
  position: relative;
  display: inline-block;
  font-size: 1.9rem;
  font-weight: bold;
  color: #fff;
  background: orange;
  padding: 10px 20px;
  box-shadow: rgba(99, 99, 99, 0.2) 0px 2px 8px 0px;
  border-radius: 4px;
}

.info p:before {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  margin-left: -10px;
  border: 10px solid transparent;
  border-top: 15px solid orange;
}

.info a:not(.registration-button) {
  display: block;
  color: var(--accent-blue);
  font-size: 2.0rem;
  padding: 0 0 10px 0;
  text-decoration: underline;
  text-underline-offset: 10px;
}

.info ul {
  display: inline-block;
  text-align: left;
  font-size: 1.2rem;
  color: #666;
  margin: 10px auto 10px;
  padding: 0 20px;
}



h2 {
  display: block;
  text-align: center;
  font-size: clamp(2.6rem, 3.2vw, 3.2rem);
  background: linear-gradient(135deg, #1a365d 0%, #2c5282 50%, #4a90e2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin: 1rem 0 1rem 0;
  padding: 0 0 1rem 0;
}


.objective {
  width: 100%;
  margin: 40px auto 0px;
}

.objective .inner {
  width: calc(100% - 50px);
  max-width: 1200px;
  margin: 0px auto 0px;
  display: grid;
  gap: 30px;
}

@media (max-width: 700px) {
  .objective {
    margin: 20px auto 0px;
  }
  .objective .inner {
    width: calc(100% - 40px);
  }
}


.objective .box {
  width: 100%;
  background: #fff;
  padding: 30px;
  border-radius: 4px;
  box-shadow: rgba(100, 100, 111, 0.2) 0px 7px 29px 0px;
}

.objective .box p {
  font-size: clamp(1.3rem, 1.6vw, 1.6rem);
}

.program {
  width: 100%;
  margin: 40px auto 0px;

}

.program .inner {
  width: calc(100% - 50px);
  max-width: 1200px;
  margin: 0px auto 0px;
  display: grid;
  /* grid-template-columns: 1fr 1fr; */
  gap: 30px;
  background: #fff;
  box-shadow: rgba(100, 100, 111, 0.2) 0px 7px 29px 0px;
}

@media (max-width: 700px) {
  .program {
    margin: 20px auto 0px;
  }
  .program .inner {
    width: calc(100% - 40px);
  }
}

.program .box {
  width: 100%;
  background: #fff;
  padding: 30px;
  border-radius: 4px;
  box-shadow: rgba(100, 100, 111, 0.2) 0px 7px 29px 0px;
}

.program-table {
  width: calc(100% - 50px);
  margin: 20px auto 40px;
  background: var(--systemGray4);
  border-bottom: solid 1px #ccc;
  box-shadow: rgba(0, 0, 0, 0.12) 0px 1px 3px, rgba(0, 0, 0, 0.24) 0px 1px 2px;
}

.program-table h3 {
  text-align: center;
  margin: 0;
  padding: 30px;
}

.program-table h3::before {
  content: "";
  display: inline-block;
  vertical-align: middle;
  width: 30px;
  height: 30px;
  background: url(ic_CalendarCheck.svg) no-repeat center center;
  background-size: contain;
}



.program-table span {
  display: block;
  font-weight: normal;
}

.program-wrapper {
  display: block;
  background: #fafafa;
  padding: 10px;
  border-bottom: solid 1px #ccc;
}



.program-box {
  display: flex;
  align-items: flex-start;
  gap: 15px;
  color: #666;
  width: 100%;
}

.program-content {
  flex: 1;
  width: 100%;
}

@media (max-width: 700px) {
  .program-wrapper {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .program-box {
    display: block;
  }

  .program-box img {
    margin: 10px auto 0;
  }
}

.program-time {
  text-align: center;
}

.program-box img {
  width: 150px;
}

.program-content span {
  display: block;
  font-size: 1.5rem;
  padding: 0 0 0.5em 0;
}

.program-content p {
  font-size: 1.8rem;
  font-weight: bold;
  margin: 0.15em 0 0.25em 0;
  padding: 0;
  color: #333;
}

p.break::before {
  content: "";
  display: inline-block;
  vertical-align: middle;
  width: 24px;
  height: 24px;
  background: url(ic_Coffee.svg) no-repeat center -3px;
  background-size: contain;
  margin-right: 5px;
}

.program-content span {
  color: #555;
  font-weight: bold;
  margin: 0 0 0em 0;
  display: block;
  font-size: 1.5rem;
}

.map {
  width: 100%;
  max-width: 1200px;
  margin: 40px auto 40px;
  padding: 20px;
  border-radius: 4px;
  background: #fff;
  box-shadow: rgba(100, 100, 111, 0.2) 0px 7px 29px 0px;
  text-align: center;
}

.map a {
  display: block;
  color: var(--accent-blue);
  font-size: 2.0rem;
  padding: 0 0 10px 0;
  text-decoration: underline;
  text-underline-offset: 10px;
  text-align: center;
}

footer {
  color: #fff;
  width: 100%;
  height: 200px;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  /* background: var(--systemGray1); */
  background: linear-gradient(135deg, #1a365d 0%, #2c5282 50%, #1a365d 100%);
}

/* TOPに戻るボタン */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 60px;
  height: 60px;
  background: var(--accent-blue);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  font-size: 1.2rem;
  font-weight: bold;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.3s ease;
  z-index: 1000;
}

.back-to-top:hover {
  background: #005bb5;
  transform: translateY(0) scale(1.05);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.3);
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top span {
  color: #fff;
}

/* スマートフォン対応 */
@media (max-width: 768px) {
  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    font-size: 1.0rem;
  }
}
/* 参加登録ボタン */
.registration-button {
  display: inline-block;
  padding: 15px 40px;
  background: var(--accent-blue);
  color: #fff !important;
  text-decoration: none;
  font-size: 1.5rem;
  font-weight: bold;
  border-radius: 8px;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(0, 114, 188, 0.3);
  text-align: center;
  margin: 20px 0;
}

.registration-button:hover {
  background: #005bb5;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0, 114, 188, 0.4);
}

@media (max-width: 768px) {
  .registration-button {
    padding: 12px 30px;
    font-size: 1.2rem;
  }
}

.disclaimer {
  width: 100%;
  margin: 0 auto 0;
  padding: 0px;
  background: #fdfdfd;
  border-bottom: #eee;
}

.disclaimer-inner {
  display: block;
  width: 100%;
  max-width: 1200px;
  padding: 20px 40px;
  margin: 0px auto 0;
}

.objective span {
  font-weight: bold;
  display: block;
  font-size: 1.9rem;
  padding: 0;
  margin: 0 0 10px 0;
}

.objective a {
  text-decoration: underline;
  text-underline-offset: 5px;
}

.objective a::before {
  content: "";
  display: inline-block;
  vertical-align: middle;
  width: 20px;
  height: 20px;
  background: url(ic_ex.svg) no-repeat center center;
  background-size: contain;
  margin: 0 4px;
}