@charset "UTF-8";

:root {
  --bg-color: #141414;
  --bg-gradient: linear-gradient(135deg,#0e002e 0%,#1e092b 23%,#320c65 49%,#a01b7c 80%,#c21780 100%);
  --main-color: #d136d1;
  --text-color: #fff;
}

body{
  font-family: "Montserrat", "Noto Sans JP", sans-serif;
  font-feature-settings: 'palt';
  background-color: #141414;
}

.container {
  max-width: 1170px;
  margin: 0 auto;
  padding: 0 30px;
}

.visible-pc {
  display: block;
}

.visible-sp {
  display: none;
}

/* header */

.header{
  background: var(--bg-gradient);
}

.header__inner {
  position: relative;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 10;
  max-width: 100%;
  margin: 0 auto;
  padding: 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header__nav-list {
  display: flex;
  gap: 30px;
}

.header__nav-link {
  font-size: 16px;
  font-weight: bold;
  line-height: 16px;
  color: var(--text-color);
  text-decoration: none;
}

.header__nav-link:hover {
  text-decoration: underline;
}

.hero__inner {
  max-width: 1244px;
  margin: 0 auto 63px;
  padding: 0 20px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
}

.hero__content {
  flex: 1;
  color: var(--text-color);
  position: relative;
  padding-bottom: 30px;
}

.hero__subtitle {
  font-size: 24px;
  font-weight: bold;
  color: var(--main-color);
  margin-bottom: 20px;
}

.hero__title {
  font-size: clamp(24px, 8vw, 100px);
  font-weight: bold;
  margin-bottom: 20px;
}

.hero__date {
  font-size: 36px;
  font-weight: bold;
  line-height: 41.4px;
  margin-bottom: 32px;
}

.hero__tagline {
  position: absolute;
  max-width: 326px;
  top: 59%;
  left: 50%;
  transform: rotate(-13deg);
}

.hero__tagline img{
  width: 100%;
}

.hero__button {
  display: inline-block;
  width: 300px;
  height: 76px;
  text-align: center;
  font-size: 18px;
  font-weight: bold;
  line-height: 76px;
  border-radius: 50px;
  background: linear-gradient(to right, #C41A7F, #664BBF);
  box-shadow: 0 4px 0 #DD118E;
  transition: transform 0.1s, box-shadow 0.1s;
}

.hero__button:hover {
  transform: translateY(4px);
  box-shadow: none;
}

.hero__visual {
  flex: 1;
  text-align: center;
  position: relative;
  min-width: 320px;
}

.hero__image {
  max-width: 100%;
  height: auto;
}

.hero__caption {
  position: absolute;
  bottom: 20px;
  right: 20px;
  text-align: right;
  color: var(--text-color);
}

.hero__name {
  font-weight: bold;
  font-size: 21px;
}

.hero__job {
  font-size: 14px;
  text-align: left;
}


/* about */

.about {
  color: var(--text-color);
  padding: 110px 30px 110px;
}

.about__heading {
  text-align: center;
  margin-bottom: 60px;
}

.about__title {
  font-size: 60px;
  font-weight: bold;
  color: var(--main-color);
  margin-bottom: 10px;
  text-transform: uppercase;
}

.about__subtitle {
  font-size: 20px;
  color: var(--text-color);
  margin-bottom: 60px;
}

.about__body {
  display: flex;
  gap: 69px;
  flex-wrap: wrap;
}

.about__image {
  max-width: 500px;
  border-radius: 8px;
  margin: 0 auto;
}

.about__image img {
  width: 100%;
  max-width: 445px;
}

.about__content {
  flex: 1;
  padding-top: 89px;
  min-width: 345px;
}

.about__theme-label {
  font-size: 24px;
  font-weight: bold;
  line-height: 27.6px;
  margin-bottom: 20px;
}

.about__theme-title {
  font-size: 48px;
  font-weight: bold;
  color: var(--main-color);
  margin-bottom: 40px;
}

.about__description {
  font-size: 18px;
  font-weight: 500;
  line-height: 32.4px;
  margin-bottom: 25px;
  letter-spacing: calc(18px * 0.05);
}

.about__info {
  margin-bottom: 30px;
}

.about__info-item {
  display: flex;
  gap: 28px;
  margin-bottom: 10px;
  font-size: 16px;
  line-height: 18.4px;
}

.about__info-term {
  width: 60px;
  font-weight: bold;
}

.about__info-desc {
  flex: 1;
  font-weight: 500;
}

.about__button {
  display: inline-block;
  width: 230px;
  height: 76px;
  text-align: center;
  font-size: 18px;
  font-weight: bold;
  line-height: 76px;
  border-radius: 50px;
  background: linear-gradient(to right, #C41A7F, #664BBF);
  box-shadow: 0 4px 0 #DD118E;
  transition: transform 0.1s, box-shadow 0.1s;
}

.about__button:hover {
  transform: translateY(4px);
  box-shadow: none;
}

/* speaker */

.speaker {
  background: var(--bg-gradient);
  color: var(--text-color);
  padding: 100px 0 100px;
}

.speaker__heading {
  text-align: center;
  margin-bottom: 60px;
}

.speaker__title {
  font-size: 60px;
  font-weight: bold;
  color: var(--main-color);
  margin-bottom: 10px;
  text-transform: uppercase;
}

.speaker__subtitle {
  font-size: 20px;
  color: var(--text-color);
  margin-bottom: 60px;
}

.speaker__item {
  display: flex;
  gap: 60px;
  margin-bottom: 80px;
  flex-wrap: wrap;
}

.speaker__text {
  flex: 1;
  min-width: 300px;
}

.speaker__item:nth-child(even) {
  flex-direction: row-reverse;
}

.speaker__name-en {
  font-size: clamp(24px, 8vw, 42px);
  font-weight: bold;
  color: var(--main-color);
  margin-bottom: 10px;
}

.speaker__name-ja {
  font-size: 18px;
  margin-bottom: 40px;
}

.speaker__bio {
  font-size: 16px;
  line-height: 28.8px;
  letter-spacing: calc(16px * 0.05);
}

.speaker__image {
  flex: 1;
  min-width: 280px;
  max-width: 445px;
}

.speaker__image img {
  width: 100%;
}

/* session */

.session {
  background-color: #111;
  color: var(--text-color);
  padding: 100px 20px;
}

.session__heading {
  text-align: center;
  margin-bottom: 60px;
}

.session__title {
  font-size: 60px;
  font-weight: bold;
  color: var(--main-color);
  margin-bottom: 10px;
  text-transform: uppercase;
}

.session__subtitle {
  font-size: 20px;
  color: var(--text-color);
  margin-bottom: 60px;
}

.session__list {
  display: flex;
  flex-direction: column;
}

.session__item {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  border-bottom: 1px solid var(--main-color);
  padding: 40px 28px;
}

.session__time {
  width: 180px;
  font-weight: bold;
  font-size: 22px;
}

.session__content {
  flex: 1;
}

.session__topic {
  font-size: 22px;
  color: var(--main-color);
  font-weight: bold;
  margin-bottom: 15px;
}

.session__desc {
  font-size: 15px;
  line-height: 22.5px;
  font-weight: 500;
  color: var(--text-color);
  margin-bottom: 6px;
}

/* form */


.form {
  background-image: url("../img/background.jpg"); /* ← パターン画像パスに置き換えてね */
  background-repeat: repeat;
  background-size: auto;
  padding: 90px 0 110px;
  color: var(--text-color);
}

.form__heading {
  text-align: center;
  margin-bottom: 60px;
}

.form__title {
  font-size: 60px;
  font-weight: bold;
  color: var(--main-color);
  margin-bottom: 10px;
  text-transform: uppercase;
}

.form__subtitle {
  font-size: 20px;
  color: var(--text-color);
  margin-bottom: 60px;
}

.form__box {
  background-color: #1a1a1a;
  border: 5px solid var(--main-color);
  border-radius: 20px;
  padding: 90px clamp(24px, 8vw, 158px) 80px;
  margin: 0 auto;
}

.form__group {
  margin-bottom: 30px;
}

.form__label {
  display: block;
  font-size: 16px;
  font-weight: bold;
  line-height: 18.6px;
  margin-bottom: 10px;
}

.form__required {
  color: var(--main-color);
  font-size: 11.2px;
  font-weight: bold;
  margin-left: 9px;
}

.form__radio-group label {
  margin-right: 35px;
  font-size: 14px;
}

.form__input,
.form__input-tel,
.form__textarea,
.form__select {
  width: 100%;
  padding: 8px;
  font-size: 16px;
  background-color: #fff;
  border: none;
  border-radius: 6px;
  color: #141414;
}

.form__input,
.form__select {
  max-width: 300px;
}


.form__input-tel{
  max-width: 200px;
}


.form__textarea{
  max-width: 600px;
  height: 200px;
  resize: vertical;
}

.form__button{
  text-align: center;
  margin-top: 50px;
}

.form__submit {
  display: inline-block;
  width: clamp(240px, 50vw, 300px);
  height: 76px;
  text-align: center;
  font-size: 18px;
  font-weight: bold;
  line-height: 76px;
  border-radius: 50px;
  background: linear-gradient(to right, #C41A7F, #664BBF);
  box-shadow: 0 4px 0 #DD118E;
  transition: transform 0.1s, box-shadow 0.1s;
  cursor: pointer;
}


.form__submit:hover {
  transform: translateY(2px);
  box-shadow: 0 2px 0 #99005a;
}

/* footer */

.footer {
  color: var(--text-color);
  padding: 70px;
  text-align: center;
}

.footer__copyright {
  font-size: 16px;
  font-weight: bold;
}

.footer__pagetop {
  position: fixed;
  right: 20px;
  bottom: 20px;
  background: linear-gradient(to right, #C41A7F, #664BBF);
  width: 80px;
  height: 80px;
  border-radius: 50%;
}

.footer__arrow {
  display: block;
  width: 20px;
  height: 20px;
  border-top: 5px solid #fff;
  border-right: 5px solid #fff;
  transform: rotate(-45deg) translate(-20%, -50%);
  position: absolute;
  top: 50%;
  left: 50%;
}

@media screen and (max-width: 767px){

  .visible-pc {
    display: none;
  }

  .visible-sp {
    display: block;
  }


.hero__tagline {
  top: 50%;
  left: 40%;
}

.hero__inner{
  margin-bottom: 0px;
}

.hero__button {
  display: block;
  margin: 0 auto;
}

.about {
  padding: 30px;
}

.about__subtitle {
  margin-bottom: 20px;
}

.about__body{
  gap: 30px;
}

.about__content {
  padding-top: 0;
}

.about__button {
  display: block;
  margin: 0 auto;
}

.speaker {
  padding: 30px 0;
}

.speaker__item {
  flex-direction: column;
  gap: 30px;
  margin-bottom: 30px;
}

.speaker__item:nth-child(even) {
  flex-direction: column;
}

.speaker__image {
  order: -1; /* 画像を先に */
  margin: 0 auto;
}

.session {
  padding: 30px 0;
}

.session__time {
  width: 80px;
}

.session__topic {
  font-size: 18px;
}

.session__desc {
  font-size: 14px;
  line-height: 18px;
}

.form {
  background-image: url("../img/background.jpg"); /* ← パターン画像パスに置き換えてね */
  background-repeat: repeat;
  background-size: auto;
  padding: 30px 0;
  color: var(--text-color);
}

.footer__pagetop {
  position: fixed;
  right: 20px;
  bottom: 20px;
  background: linear-gradient(to right, #C41A7F, #664BBF);
  width: 60px;
  height: 60px;
  border-radius: 50%;
}

.footer__arrow {
  display: block;
  width: 10px;
  height: 10px;
  border-top: 2.5px solid #fff;
  border-right: 2.5px solid #fff;
  transform: rotate(-45deg) translate(-20%, -50%);
  position: absolute;
  top: 50%;
  left: 50%;
}

}