html {
  background-color: #000;
  color: #fff;
  font-family: 'Noto Sans JP', sans-serif;
}

body {
  max-width: 720px;
  margin: 0 auto;
}

/* 共通 */
section {
  padding: 40px 12px;
}

.section-title {
  font-size: 30px;
  text-align: center;
  line-height: 120%;
  margin-bottom: 6px;
}

.color-bar {
  width: 114px;
  height: 2px;
  background: linear-gradient(
    to right,
    #4caf50 0% 20%,
    #2196f3 20% 40%,
    #9c27b0 40% 60%,
    #f44336 60% 80%,
    #ffc107 80% 100%
  );
  margin: 0 auto;
}

/* イベント案内カード */
.event-card {
  background-color: #fff;
  width: 100%;
  margin: 20px auto;
}

.event-card-content {
  color: #000;
  padding: 4px 10px;
  max-width: 380px;
  margin: 0 auto;
}

.event-card .badge {
  display: block;
  background: #000;
  color: #fff;
  padding: 4px 10px;
  width: 100%;
  max-width: 120px;
  font-size: 12px;
}

.date-row {
  display: flex;
  flex-direction: row;
  align-items: baseline;
  gap: 4px;
  line-height: 1;
}

.date-row .md {
  font-weight: 500;
  font-size: 65px;
  letter-spacing: -0.03em;
}

@media (max-width: 400px) {
  .date-row .md {
    font-size: clamp(56px, 6vw, 65px);
  }
}

.date-row .dow {
  writing-mode: vertical-rl;
  font-weight: 500;
  font-size: 11px;
}

.event-card .rule {
  height: 1px;
  background: #707070;
  width: 100%;
  margin: 4px auto;
}

.event-card .time {
  font-size: 21px;
  text-align: left;
  margin-bottom: 4px;
  font-weight: 500;
}

.event-card .venue {
  font-size: 18px;
  text-align: left;
  margin-bottom: 6px;
}

.event-card .price {
  text-align: center;
  font-size: 23px;
  font-weight: 500;
}

.price .amount {
  letter-spacing: 0.04em;
}

/* 参加ボタン */
.button-form {
  width: 100%;
  padding: 16px;
  background-color: #da4a52;
  font-size: 30px;
  text-decoration: none;
  border-radius: 55px;
  display: block;
  font-weight: 500;
  box-shadow: 0px 3px 6px rgba(0, 0, 0, 0.16);
  text-align: center;
}

#floating-bar .button-form {
  max-width: 720px;
  margin: 0 auto;
}

/* ヘッダー */
header {
  padding: 9px 8px;
  background-color: #111;
  border: 1px solid #707070;
}

header a {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: #fff;
  gap: 6px;
}

header img {
  width: 24px;
  height: 24px;
}

header div {
  font-size: 14px;
  font-weight: bold;
}

/* フローティングバー*/
#floating-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  padding: 15px;
  background-color: rgba(0, 0, 0, 0.45);
  box-sizing: border-box;
  text-align: center;
  transform: translateY(100%);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.25s ease, opacity 0.25s ease;
  z-index: 1000;
}

#floating-bar.is-visible {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

/* トップページ */
#top {
  position: relative;
  background: #000;
  overflow: hidden;
  text-align: center;
  height: 100%;
  min-height: 770px;
  padding: 0;
}

.top-bg {
  position: relative;
}

.top-bg img {
  display: block;
  object-fit: cover;
  min-height: 415px;
  width: 130%;
  transform: translateX(-10%);
}

.top-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0) 60%,
    rgba(0, 0, 0, 1) 100%
  );
}

.top-content {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 5;
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  height: 100%;
  max-width: 600px;
  margin: 0 auto;
  padding: 8px 24px;
  padding-bottom: 0;
}

.top-content .color-bar {
  width: 100%;
  height: 4px;
  margin: 8px auto;
}

.top-content__logo {
  width: 162px;
}

.top-content__subtitle {
  font-size: 24px;
  margin: 6px auto;
}

.top-content__title {
  font-size: 48px;
  line-height: 120%;
  letter-spacing: 0.03em;
}

.top-content__text {
  letter-spacing: 0.03em;
  font-size: 28px;
  line-height: 150%;
}

.top-content__text-sub {
  font-size: 21px;
  line-height: 120%;
  letter-spacing: 0.03em;
}

/* Concept */
#concept {
  text-align: center;
  padding-top: 0;
}

.concept-content__title {
  font-size: 46px;
  letter-spacing: 0.08em;
  margin-top: 12px;
  margin-bottom: 12px;
}

.concept-content__subtitle {
  font-size: 24px;
  line-height: 120%;
}

.concept-content__text {
  font-size: 16px;
  line-height: 150%;
  letter-spacing: 0.08em;
}

.concept-content p.concept-content__text:nth-of-type(3) {
  margin-top: 14px;
  margin-bottom: 20px;
}

/* program  */
#program {
  text-align: center;
}

:root {
  --green: #6cbc3f;
  --blue: #269ad7;
  --purple: #d294ff;
  --red: #da4a52;
  --yellow: #fcc323;

  --band-w: 110px;
  --slope: 45px;

  --title-size: clamp(24px, 6vw, 32px);
  --desc-size: clamp(17px, 2.4vw, 17px);
  --time-size: 20px;
  --num-size: 30px;
}

#green {
  --text-color: var(--green);
  --band-color: var(--green);
}

#blue {
  --text-color: var(--blue);
  --band-color: var(--blue);
}

#purple {
  --text-color: var(--purple);
  --band-color: var(--purple);
}

#red {
  --text-color: var(--red);
  --band-color: var(--red);
}

#yellow {
  --text-color: var(--yellow);
  --band-color: var(--yellow);
}

.program-content {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 30px;
}

.schedule-card {
  position: relative;
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: 90px;
  height: fit-content;
  background: #fff;
  padding: 10px;
}

.schedule-card .num {
  position: absolute;
  left: 8px;
  top: 20px;
  transform: translateY(-50%);
  color: var(--text-color);
  font-weight: 500;
  font-size: var(--num-size);
  line-height: 1;
  z-index: 2;
}

.schedule-card .band {
  position: absolute;
  inset: 0;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  z-index: 1;
  --band-center-x: calc(var(--slope) + var(--band-w) / 2);
}

.schedule-card .band::before {
  content: '';
  position: absolute;
  inset: 0;
  clip-path: polygon(
    0 100%,
    var(--slope) 0,
    calc(var(--slope) + var(--band-w)) 0,
    var(--band-w) 100%
  );
}

.schedule-card .band::before {
  background: var(--band-color);
}

.schedule-card .band::after {
  content: attr(data-time);
  white-space: pre;
  position: absolute;
  top: 50%;
  left: 75px;
  transform: translate(-50%, -50%);
  color: #fff;
  font-weight: 500;
  font-size: var(--time-size);
  line-height: 1.25;
  white-space: pre-line;
  text-align: left;
}

.schedule-card .right {
  flex: 1 1 0;
  padding-left: calc(var(--slope) + var(--band-w) - 10px);
  z-index: 1;
  text-align: left;
}

.schedule-card .title {
  font-weight: 500;
  font-size: var(--title-size);
  color: var(--text-color);
  margin-bottom: 4px;
}

.schedule-card .desc {
  font-size: var(--desc-size);
  color: #000;
}

.ceo-session-container {
  background-color: #fff;
  color: #000;
}

.ceo-session {
  padding: 8px 17px;
}

.ceo-session__title {
  font-size: 30px;
  font-weight: 500;
  margin-bottom: 6px;
}

.ceo-session__subtitle {
  font-size: 20px;
  margin-bottom: 12px;
  line-height: 120%;
}

.ceo-session__speakers {
  margin-bottom: 15px;
}

.ceo-session__speakers-caption {
  text-align: center;
  font-size: 17px;
  margin-bottom: 6px;
}

.ceo-session__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.ceo-session__list-item {
  width: 100%;
  max-width: 340px;
  margin: 0 auto;
  background-color: #eeeeee;
  padding: 10px;
  width: 100%;
  border-radius: 15px;
  text-align: left;
  display: flex;
  gap: 10px;
  align-items: center;
}

.ceo-session__list-item > img {
  width: 144px;
  border-radius: 15px;
  object-fit: contain;
  flex: 1;
  display: block;
}

.ceo-session__list-item > img.adjustment {
  aspect-ratio: 3 / 2;
  object-fit: cover;
  object-position: top;
}

.ceo-session__list-item > div {
  flex: 1;
}

.ceo-session__list-item-name {
  font-size: 15px;
}

.ceo-session__list-item-company {
  font-size: 12px;
  margin-top: 4px;
}

.ceo-session__list-item-description {
  font-size: 10px;
  margin-top: 8px;
}

/* company */
.company-info {
  width: 100%;
  max-width: 375px;
  margin: 20px auto;
  display: block;
  object-fit: contain;
}

/* partners */
#partners {
  text-align: center;
}

.partners-list {
  margin: 20px auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 20px;
}

.partners-list-item {
  width: 100%;
  height: 150px;
  max-width: 340px;
  margin: 0 auto;
  text-align: center;
  padding: 36px;
  background-color: #eeeeee;
  color: #000;
  font-size: 28px;
  border-radius: 15px;
}

.partners-list-item > img {
  width: 100%;
  height: 100%;
  border-radius: 15px;
  object-fit: contain;
}

/* footer */
footer {
  background-color: #fff;
  padding: 8px 18px;
  text-align: center;
  border-top: 1px solid #707070;
}

.footer-logo {
  width: 100%;
  margin: 0 auto;
  max-width: 300px;
}