/* ====================================================================
   深海サバイバル 特設ページ（/event/deepsea-survival/）
   手書き CSS。本体サイト（Figma Sites 出力）とは独立。
   フォントは fonts.css（../../fonts/ を参照）。
   ---------------------------------------------------------------
   色は本体サイトから流用：
     緑   #00773c（ボタン・見出し）
     青緑 #007f9e（アクセント）
     墨   #3a3840（本文）
     霞   #ddecf0（淡い背景）
   深海パートはキービジュアルに合わせた紺＋黄。
   ==================================================================== */

:root {
  --green: #00773c;
  --green-dark: #005c2e;
  --teal: #007f9e;
  --ink: #3a3840;
  --ink-soft: #5d5b63;
  --mist: #ddecf0;
  --mist-soft: #eef5f7;
  --paper: #ffffff;
  --paper-soft: #f8f8f8;
  --line: #d5dfe3;

  --deep-1: #03101d;
  --deep-2: #062744;
  --deep-3: #0b3a60;
  --deep-text: #e6f0f7;
  --deep-muted: #9fb8cc;
  --yellow: #ffd83d;

  --font-body: "Noto Sans JP", "Noto Sans JP:Regular", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  --font-head: "Zen Maru Gothic:Black", "Zen Maru Gothic", "Hiragino Maru Gothic ProN", sans-serif;
  --font-head-bold: "Zen Maru Gothic:Bold", "Zen Maru Gothic", "Hiragino Maru Gothic ProN", sans-serif;
  --font-en: "Nunito:Black", "Nunito", "Avenir Next", sans-serif;

  --container: 1104px;
  --narrow: 760px;
  --radius: 20px;
}

/* ---------- リセット ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.9;
  font-feature-settings: "palt";
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1,
h2,
h3,
p,
ul,
ol,
dl,
dd,
figure {
  margin: 0;
}

ul,
ol {
  padding: 0;
  list-style: none;
}

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

a {
  color: inherit;
}

strong {
  font-weight: 700;
}

.en {
  font-family: var(--font-en);
  letter-spacing: .02em;
}

.sp {
  display: none;
}

@media (max-width: 799px) {
  .sp {
    display: inline;
  }

  .pc {
    display: none;
  }
}

/* ---------- レイアウト共通 ---------- */
.container {
  width: min(100% - 48px, var(--container));
  margin-inline: auto;
}

.container--narrow {
  max-width: var(--narrow);
}

@media (max-width: 799px) {
  .container {
    width: calc(100% - 40px);
  }
}

section {
  padding-block: 64px;
}

@media (max-width: 799px) {
  section {
    padding-block: 48px;
  }
}

.section-head {
  text-align: center;
  margin-bottom: 40px;
}

.section-eyebrow {
  font-family: var(--font-en);
  color: var(--teal);
  font-size: 14px;
  letter-spacing: .18em;
  line-height: 1.4;
  margin-bottom: 10px;
}

.section-eyebrow:lang(ja) {
  font-family: var(--font-head-bold);
  letter-spacing: .08em;
}

.section-title {
  font-family: var(--font-head);
  font-size: 34px;
  line-height: 1.4;
  color: var(--green);
  letter-spacing: .04em;
}

.section-title--lg {
  font-size: 40px;
}

.section-title--center {
  text-align: center;
}

.section-lead {
  margin-top: 24px;
  font-size: 17px;
}

.section-lead strong {
  font-family: var(--font-head-bold);
  font-weight: 400;
  font-size: 19px;
  color: var(--teal);
}

@media (max-width: 799px) {
  .section-title {
    font-size: 26px;
  }

  .section-title--lg {
    font-size: 30px;
  }

  .section-lead {
    font-size: 15px;
    text-align: left;
  }

  .section-lead strong {
    font-size: 17px;
  }

  .section-head {
    margin-bottom: 28px;
  }
}

/* ---------- ボタン ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 32px;
  border: 2px solid var(--green);
  border-radius: 999px;
  background: #fff;
  color: var(--green);
  font-family: var(--font-head);
  font-size: 16px;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color .2s ease, color .2s ease, transform .2s ease, box-shadow .2s ease;
}

.btn:hover,
.btn:focus-visible {
  background: var(--green);
  color: #fff;
}

.btn--primary {
  background: var(--green);
  color: #fff;
  box-shadow: 0 8px 24px rgba(0, 119, 60, .28);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background: var(--green-dark);
  border-color: var(--green-dark);
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(0, 119, 60, .35);
}

.btn--lg {
  min-width: 320px;
  padding: 20px 44px;
  font-size: 20px;
}

.btn--sm {
  padding: 10px 22px;
  font-size: 14px;
}

.btn__note {
  font-family: var(--font-en);
  font-size: .7em;
  opacity: .85;
  padding: 2px 10px;
  border: 1px solid currentColor;
  border-radius: 999px;
}

@media (max-width: 799px) {
  .btn--lg {
    min-width: 0;
    width: 100%;
    padding: 18px 24px;
    font-size: 18px;
  }
}

/* ---------- 画像プレースホルダー ----------
   画像差し込み前の仮置き。<img class="photo"> に置き換えると消える。 */
.ph {
  position: relative;
  display: grid;
  place-items: center;
  width: 100%;
  border-radius: var(--radius);
  border: 2px dashed rgba(0, 127, 158, .45);
  background:
    repeating-linear-gradient(45deg, rgba(0, 127, 158, .06) 0 12px, transparent 12px 24px),
    var(--mist-soft);
  color: var(--teal);
  font-family: var(--font-head-bold);
  font-size: 15px;
  line-height: 1.6;
  text-align: center;
  overflow: hidden;
}

.ph span {
  padding: 16px;
}

.ph small {
  display: block;
  margin-top: 4px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px;
  opacity: .75;
}

.ph--portrait {
  aspect-ratio: 4 / 5;
}

.ph--wide {
  aspect-ratio: 16 / 10;
}

.ph--square {
  aspect-ratio: 1 / 1;
}

.ph--dark {
  border-color: rgba(255, 216, 61, .45);
  background:
    repeating-linear-gradient(45deg, rgba(255, 255, 255, .04) 0 12px, transparent 12px 24px),
    rgba(255, 255, 255, .04);
  color: var(--yellow);
}

.photo {
  width: 100%;
  border-radius: var(--radius);
  object-fit: cover;
}

.ishigaki__photo .photo {
  aspect-ratio: 4 / 5;
}

.mission__media .photo,
.deep__media .photo {
  aspect-ratio: 16 / 10;
}

/* 縦写真（MISSION 03）は 16:10 に切ると顔が消えるので縦長枠で表示 */
.mission__media .photo--tall {
  aspect-ratio: 4 / 5;
  object-position: 50% 35%;
}

/* 登壇者写真は円形にぼかした加工済み素材なので、白地の円として表示する */
.speaker__photo .photo {
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background: #fff;
}

/* ---------- 問いリスト ---------- */
.qlist {
  margin: 20px 0;
  padding: 20px 24px;
  border-radius: 14px;
  background: rgba(0, 127, 158, .07);
}

.qlist li {
  position: relative;
  padding-left: 1.6em;
  font-family: var(--font-head-bold);
  color: var(--teal);
  line-height: 1.8;
}

.qlist li+li {
  margin-top: 6px;
}

.qlist li::before {
  content: "Q";
  position: absolute;
  left: 0;
  top: .1em;
  font-family: var(--font-en);
  font-size: .9em;
  color: var(--green);
}

.qlist--tight {
  padding: 14px 20px;
}

.qlist--dark {
  background: rgba(255, 255, 255, .06);
}

.qlist--dark li {
  color: var(--deep-text);
}

.qlist--dark li::before {
  color: var(--yellow);
}

/* ====================================================================
   ヘッダー
   ==================================================================== */
/* ロゴを中央に大きく。申込ボタンは右端に絶対配置。
   ページ冒頭の「看板」として見せたいので sticky にはせず、通常フローで置く。 */
.site-header {
  position: relative;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px 24px;
  background: #fff;
  border-bottom: 1px solid var(--line);
}

.site-header__logo img {
  height: 120px;
  width: auto;
}

.site-header__cta {
  position: absolute;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
}

@media (max-width: 799px) {
  .site-header {
    padding: 16px;
  }

  .site-header__logo img {
    height: 96px;
  }

  .site-header__cta {
    display: none;
  }
}

/* ---------- 当日券バッジ ----------
   ヒーロー・開催概要・申込CTAの申込ボタン直上に置く黄色の告知。 */
.ticket-note {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  width: fit-content;
  margin: 28px auto 14px;
  padding: 12px 36px;
  border-radius: 16px;
  background: var(--yellow);
  color: var(--deep-1);
  transform: rotate(-2deg);
  box-shadow: 0 8px 24px rgba(0, 0, 0, .18);
}

.ticket-note__main {
  font-family: var(--font-head);
  font-size: 26px;
  line-height: 1.3;
  letter-spacing: .04em;
}

.ticket-note__sub {
  font-family: var(--font-head-bold);
  font-size: 15px;
  line-height: 1.3;
}

@media (max-width: 799px) {
  .ticket-note {
    margin: 20px auto 12px;
    padding: 10px 26px;
  }

  .ticket-note__main {
    font-size: 21px;
  }

  .ticket-note__sub {
    font-size: 13px;
  }
}

/* ====================================================================
   ヒーロー
   ==================================================================== */
.hero {
  position: relative;
  padding-block: 48px 64px;
  color: var(--deep-text);
  background:
    radial-gradient(ellipse 70% 40% at 50% -5%, rgba(0, 160, 200, .35), transparent 70%),
    radial-gradient(ellipse 60% 50% at 85% 90%, rgba(0, 127, 158, .18), transparent 70%),
    linear-gradient(180deg, var(--deep-3) 0%, var(--deep-2) 45%, var(--deep-1) 100%);
  overflow: hidden;
}

/* 光の筋 */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(100deg, transparent 30%, rgba(255, 255, 255, .05) 40%, transparent 48%),
    linear-gradient(80deg, transparent 55%, rgba(255, 255, 255, .04) 62%, transparent 70%);
}

.hero__inner {
  position: relative;
  width: min(100% - 48px, var(--container));
  margin-inline: auto;
  text-align: center;
}

.hero__tag {
  margin-bottom: 20px;
}

.hero__tag-badge {
  display: inline-block;
  padding: 8px 22px;
  border-radius: 999px;
  background: var(--yellow);
  color: var(--deep-1);
  font-family: var(--font-head);
  font-size: 15px;
  line-height: 1.4;
  letter-spacing: .06em;
}

.hero__title {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  font-family: var(--font-head);
  line-height: 1.3;
  letter-spacing: .03em;
  text-shadow: 0 2px 24px rgba(0, 0, 0, .35);
}

.hero__title-sub {
  font-size: 26px;
  color: #fff;
}

.hero__title-main {
  font-size: 60px;
  color: #fff;
}

.hero__title-desc {
  margin-top: 6px;
  font-family: var(--font-head-bold);
  font-size: 20px;
  line-height: 1.5;
  letter-spacing: .04em;
  color: #fff;
}

.hero__x {
  font-family: var(--font-en);
  color: var(--yellow);
  margin-inline: .1em;
}

.hero__date {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 18px;
  margin-top: 22px;
  color: var(--yellow);
  font-family: var(--font-head);
  line-height: 1;
}

.hero__date-num {
  font-family: var(--font-en);
  font-size: 52px;
}

.hero__date-num small {
  font-size: .6em;
  margin-inline: 2px;
}

.hero__date-sep {
  font-family: var(--font-head);
  font-size: .5em;
  margin-inline: 4px;
  vertical-align: .2em;
}

.hero__date-place {
  font-size: 26px;
  color: #fff;
}

.hero__kv {
  margin: 32px auto 0;
  max-width: 960px;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(0, 0, 0, .45);
}

.hero__days {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  max-width: 760px;
  margin: 24px auto 0;
}

.hero__day {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto;
  column-gap: 14px;
  row-gap: 2px;
  align-items: center;
  padding: 16px 20px;
  border-radius: 14px;
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .16);
  text-align: left;
  text-decoration: none;
  transition: background-color .2s ease;
}

.hero__day:hover {
  background: rgba(255, 255, 255, .14);
}

.hero__day-label {
  grid-row: 1 / 3;
  padding: 4px 10px;
  border-radius: 6px;
  background: var(--yellow);
  color: var(--deep-1);
  font-family: var(--font-en);
  font-size: 15px;
  line-height: 1.3;
}

.hero__day-kind {
  font-family: var(--font-head);
  font-size: 18px;
  line-height: 1.4;
  color: #fff;
}

.hero__day-when {
  font-family: var(--font-head-bold);
  font-size: 14px;
  line-height: 1.5;
  color: var(--deep-text);
}

.hero__day-where {
  grid-column: 2;
  font-size: 12px;
  line-height: 1.5;
  color: var(--deep-muted);
}

.hero__cta {
  margin-top: 28px;
}

.ticket-note+.hero__cta {
  margin-top: 6px;
}

.ticket-note+.outline__cta,
.ticket-note+.apply__cta {
  margin-top: 4px;
}

.hero__cta .btn--primary {
  border-color: var(--yellow);
  background: var(--yellow);
  color: var(--deep-1);
  box-shadow: 0 10px 30px rgba(255, 216, 61, .25);
}

.hero__cta .btn--primary:hover,
.hero__cta .btn--primary:focus-visible {
  background: #ffe46b;
  border-color: #ffe46b;
}

@media (max-width: 799px) {
  .hero {
    padding-block: 32px 44px;
  }

  .hero__inner {
    width: calc(100% - 32px);
  }

  .hero__tag-badge {
    font-size: 13px;
    padding: 6px 16px;
  }

  .hero__title-sub {
    font-size: 18px;
  }

  .hero__title-main {
    font-size: 38px;
  }

  .hero__title-desc {
    font-size: 15px;
    margin-top: 4px;
  }

  .hero__date {
    gap: 12px;
    margin-top: 14px;
  }

  .hero__date-num {
    font-size: 38px;
  }

  .hero__date-place {
    font-size: 20px;
  }

  .hero__kv {
    margin-top: 28px;
    border-radius: 12px;
  }

  .hero__days {
    grid-template-columns: 1fr;
    gap: 10px;
    margin-top: 24px;
  }

  .hero__cta {
    margin-top: 28px;
  }
}

/* ====================================================================
   イントロ
   ==================================================================== */
.intro {
  text-align: center;
  background: var(--paper);
}

.intro__lead {
  font-family: var(--font-head);
  font-size: 24px;
  line-height: 1.7;
  color: var(--green);
  margin-bottom: 24px;
}

.intro__text {
  font-size: 17px;
}

.intro__text+.intro__text {
  margin-top: 16px;
}

.intro__catch {
  display: flex;
  justify-content: center;
  gap: 32px;
  margin-top: 32px;
  font-family: var(--font-head-bold);
  font-size: 20px;
  color: var(--ink-soft);
}

.intro__big {
  margin: 8px 0 20px;
  font-family: var(--font-head);
  font-size: 36px;
  line-height: 1.5;
  color: var(--teal);
  letter-spacing: .04em;
}

@media (max-width: 799px) {
  .intro__lead {
    font-size: 17px;
  }

  .intro__text {
    font-size: 15px;
    text-align: left;
  }

  .intro__catch {
    flex-direction: column;
    gap: 2px;
    margin-top: 36px;
    font-size: 17px;
  }

  .intro__big {
    font-size: 24px;
    letter-spacing: .02em;
  }
}

/* ====================================================================
   石垣幸二
   ==================================================================== */
.ishigaki {
  background: var(--mist);
}

.ishigaki__grid {
  display: grid;
  grid-template-columns: 2fr 3fr;
  gap: 44px;
  align-items: start;
}

.ishigaki__photo {
  position: sticky;
  top: 88px;
}

.ishigaki__body .section-eyebrow {
  text-align: left;
}

.ishigaki__body .section-title {
  font-size: 44px;
  margin-bottom: 12px;
}

.ishigaki__body p+p {
  margin-top: 14px;
}

.badge {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 999px;
  font-family: var(--font-head);
  font-size: 15px;
  line-height: 1.4;
  margin-bottom: 22px;
}

.badge--tv {
  background: var(--yellow);
  color: var(--deep-1);
}

@media (max-width: 799px) {
  .ishigaki__grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .ishigaki__photo {
    position: static;
    max-width: 320px;
    margin-inline: auto;
  }

  .ishigaki__body {
    text-align: left;
  }

  .ishigaki__body .section-title {
    font-size: 34px;
  }

  .ishigaki__body p {
    font-size: 15px;
  }
}

/* ====================================================================
   3つのMISSION
   ==================================================================== */
.missions {
  background: var(--paper);
}

.missions .section-title--lg .en {
  font-size: 1.25em;
  color: var(--teal);
  vertical-align: -.04em;
}

.mission-list {
  display: grid;
  gap: 44px;
  counter-reset: mission;
}

.mission {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.mission--rev .mission__media {
  order: 2;
}

.mission__num {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding-bottom: 6px;
  border-bottom: 3px solid var(--yellow);
  color: var(--teal);
  font-size: 15px;
  line-height: 1.2;
  letter-spacing: .1em;
  margin-bottom: 14px;
}

.mission__num-digit {
  font-size: 30px;
  color: var(--green);
}

.mission__title {
  font-family: var(--font-head);
  font-size: 28px;
  line-height: 1.45;
  color: var(--green);
  margin-bottom: 16px;
}

.mission__body p+p {
  margin-top: 12px;
}

.mission__env {
  font-family: var(--font-head-bold);
  color: var(--ink-soft);
}

.mission__close {
  margin-top: 20px !important;
  font-family: var(--font-head);
  font-size: 20px;
  color: var(--teal);
}

@media (max-width: 999px) {
  .mission {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .mission--rev .mission__media {
    order: 0;
  }

  .mission-list {
    gap: 40px;
  }

  .mission__title {
    font-size: 23px;
  }

  .mission__body p {
    font-size: 15px;
  }

  .mission__close {
    font-size: 18px;
  }
}

/* ====================================================================
   深海について（ダークセクション）
   ==================================================================== */
.deep {
  position: relative;
  color: var(--deep-text);
  background:
    radial-gradient(ellipse 80% 50% at 50% 100%, rgba(0, 127, 158, .25), transparent 70%),
    linear-gradient(180deg, var(--deep-1) 0%, var(--deep-2) 60%, var(--deep-1) 100%);
  overflow: hidden;
}

/* 浮遊するプランクトンのような光点 */
.deep::before,
.deep::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(circle, rgba(255, 255, 255, .35) 1px, transparent 1.5px),
    radial-gradient(circle, rgba(120, 200, 230, .3) 1px, transparent 1.5px);
  background-size: 220px 260px, 340px 300px;
  background-position: 20px 40px, 160px 120px;
  opacity: .5;
}

.deep::after {
  background-size: 180px 200px, 400px 380px;
  background-position: 90px 10px, 240px 200px;
  opacity: .3;
}

.deep .container {
  position: relative;
}

.deep__title {
  font-family: var(--font-head);
  font-size: 40px;
  line-height: 1.4;
  color: #fff;
  text-align: center;
  margin-bottom: 28px;
}

.deep__media {
  margin-bottom: 32px;
}

.deep p {
  font-size: 17px;
}

.deep p+p {
  margin-top: 14px;
}

.deep__word {
  font-family: var(--font-head);
  font-size: 40px;
  line-height: 1.4;
  color: var(--yellow);
  margin-bottom: 8px !important;
}

.deep__word--end {
  margin-top: 28px !important;
  text-align: center;
}

.deep__conditions {
  display: flex;
  gap: 12px;
  margin: 20px 0;
}

.deep__conditions li {
  flex: 1;
  padding: 14px 10px;
  border-radius: 12px;
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .12);
  text-align: center;
  font-family: var(--font-head-bold);
  font-size: 17px;
  line-height: 1.4;
}

.deep__creatures {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 20px 0;
}

.deep__creatures li {
  padding: 8px 18px;
  border-radius: 999px;
  background: rgba(255, 216, 61, .12);
  border: 1px solid rgba(255, 216, 61, .4);
  color: var(--yellow);
  font-family: var(--font-head-bold);
  font-size: 15px;
  line-height: 1.4;
}

.deep__creatures-more {
  background: none !important;
  border-color: transparent !important;
  color: var(--deep-muted) !important;
}

.deep__quote {
  font-family: var(--font-head);
  font-size: 26px;
  color: #fff;
  margin-top: 24px !important;
  margin-bottom: 0 !important;
}

.deep__but {
  margin-top: 24px !important;
  font-family: var(--font-head-bold);
  font-size: 20px;
  color: var(--deep-muted);
}

.deep__strong {
  font-family: var(--font-head);
  font-size: 24px;
  line-height: 1.6;
  color: var(--yellow);
  margin-top: 8px !important;
  margin-bottom: 28px !important;
}

@media (max-width: 799px) {
  .deep__title {
    font-size: 28px;
    margin-bottom: 28px;
  }

  .deep__media {
    margin-bottom: 36px;
  }

  .deep p {
    font-size: 15px;
  }

  .deep__word {
    font-size: 32px;
  }

  .deep__conditions {
    flex-direction: column;
    gap: 8px;
  }

  .deep__conditions li {
    padding: 10px;
    font-size: 15px;
  }

  .deep__quote {
    font-size: 22px;
  }

  .deep__but {
    font-size: 18px;
  }

  .deep__strong {
    font-size: 20px;
  }
}

/* ====================================================================
   深海調査隊 ＋ 動画
   ==================================================================== */
.squad {
  background: var(--mist-soft);
  text-align: center;
}

.squad .section-title--center {
  margin-bottom: 24px;
}

.squad__text {
  font-size: 17px;
}

.squad__text+.squad__text {
  margin-top: 12px;
}

.squad__text--close {
  margin-top: 28px !important;
}

.squad__big {
  margin: 8px 0;
  font-family: var(--font-head);
  font-size: 40px;
  line-height: 1.4;
  color: var(--teal);
  letter-spacing: .04em;
}

.squad__big--q {
  color: var(--green);
}

.squad__photo {
  max-width: 680px;
  margin: 28px auto 8px;
}

.squad__photo .photo {
  aspect-ratio: 16 / 9;
  box-shadow: 0 16px 40px rgba(0, 40, 60, .18);
}

.squad__actions {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin: 24px 0;
}

.squad__actions li {
  padding: 22px 6px;
  border-radius: 14px;
  background: #fff;
  border: 2px solid rgba(0, 127, 158, .2);
  font-family: var(--font-head);
  font-size: 17px;
  letter-spacing: 0;
  line-height: 1.4;
  color: var(--teal);
}

.video {
  position: relative;
  margin-top: 40px;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--deep-1);
  box-shadow: 0 20px 50px rgba(0, 40, 60, .25);
}

.video iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

@media (max-width: 799px) {
  .squad__text {
    font-size: 15px;
  }

  .squad__big {
    font-size: 30px;
  }

  .squad__photo {
    margin: 20px auto 4px;
  }

  .squad__photo .photo {
    border-radius: 12px;
  }

  .squad__actions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    margin: 28px 0;
  }

  .squad__actions li {
    padding: 16px 8px;
    font-size: 16px;
  }

  .video {
    margin-top: 40px;
    border-radius: 12px;
  }
}

/* ====================================================================
   スペシャリスト（石垣・鈴木）
   ==================================================================== */
.experts {
  background: var(--paper);
}

.expert {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 40px;
  align-items: start;
}

.expert+.expert {
  margin-top: 48px;
  padding-top: 48px;
  border-top: 1px solid var(--line);
}

/* 2人目は写真を右側に。列幅も入れ替える（order だけだと 1fr 側に写真が入ってしまう） */
.expert--rev {
  grid-template-columns: 1fr 220px;
}

.expert--rev .expert__photo {
  order: 2;
}

.expert__photo {
  position: sticky;
  top: 24px;
}

.expert__photo .photo {
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background: #fff;
}

.expert__eyebrow {
  font-family: var(--font-head-bold);
  font-size: 16px;
  line-height: 1.6;
  color: var(--teal);
  margin-bottom: 6px;
}

.expert__name {
  font-family: var(--font-head);
  font-size: 36px;
  line-height: 1.3;
  color: var(--green);
  margin-bottom: 18px;
}

.expert__body p+p {
  margin-top: 14px;
}

.expert__em {
  font-family: var(--font-head-bold);
  color: var(--ink);
}

.expert__quote {
  padding: 12px 18px;
  border-left: 4px solid var(--yellow);
  background: var(--paper-soft);
  font-family: var(--font-head-bold);
  line-height: 1.9;
}

.expert__strong {
  font-family: var(--font-head);
  font-size: 21px;
  line-height: 1.6;
  color: var(--teal);
}

@media (max-width: 799px) {
  .expert {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .expert--rev {
    grid-template-columns: 1fr;
  }

  .expert--rev .expert__photo {
    order: 0;
  }

  .expert__photo {
    position: static;
    max-width: 200px;
    margin-inline: auto;
  }

  .expert__eyebrow {
    font-size: 15px;
  }

  .expert+.expert {
    margin-top: 32px;
    padding-top: 32px;
  }

  .expert__name {
    font-size: 30px;
  }

  .expert__body {
    font-size: 15px;
  }

  .expert__strong {
    font-size: 19px;
  }
}

/* ====================================================================
   舞台は本物の深海へ（ダークセクション）
   ==================================================================== */
.rov {
  position: relative;
  text-align: center;
  color: var(--deep-text);
  background:
    radial-gradient(ellipse 70% 45% at 50% 0%, rgba(0, 160, 200, .3), transparent 70%),
    linear-gradient(180deg, var(--deep-2) 0%, var(--deep-1) 55%, var(--deep-2) 100%);
  overflow: hidden;
}

.rov::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(circle, rgba(255, 255, 255, .35) 1px, transparent 1.5px),
    radial-gradient(circle, rgba(120, 200, 230, .3) 1px, transparent 1.5px);
  background-size: 220px 260px, 340px 300px;
  background-position: 40px 20px, 180px 140px;
  opacity: .45;
}

.rov .container {
  position: relative;
}

.rov__title {
  font-family: var(--font-head);
  font-size: 40px;
  line-height: 1.4;
  color: #fff;
  margin-bottom: 20px;
}

.rov__text {
  font-size: 17px;
}

.rov__text+.rov__text {
  margin-top: 12px;
}

.rov__text strong {
  font-family: var(--font-head-bold);
  font-weight: 400;
  color: var(--yellow);
}

.rov__big {
  margin: 20px 0 0;
  font-family: var(--font-head);
  font-size: 34px;
  line-height: 1.5;
  color: var(--yellow);
  letter-spacing: .03em;
}

.rov__team {
  margin: 36px 0;
  padding: 28px 24px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .12);
}

.rov__ito {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  margin: 24px 0 28px;
}

.rov__ito .photo {
  width: 160px;
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(255, 216, 61, .6), 0 16px 40px rgba(0, 0, 0, .4);
}

.rov__ito-name {
  font-family: var(--font-head);
  font-size: 28px;
  line-height: 1.3;
  color: #fff;
}

.rov__ito-logo {
  display: block;
  width: 170px;
  height: auto;
  margin: 0 auto 10px;
}

.rov__dive {
  margin: 36px 0;
}

.rov__dive .rov__text+.rov__text {
  margin-top: 18px;
}

.rov__but {
  margin-top: 24px;
  font-family: var(--font-head-bold);
  font-size: 20px;
  color: var(--deep-muted);
}

.rov__nots {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin: 28px 0;
}

.rov__nots li {
  padding: 12px 24px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, .25);
  font-family: var(--font-head-bold);
  font-size: 17px;
  line-height: 1.4;
  color: var(--deep-text);
}

.rov__strong {
  font-family: var(--font-head);
  font-size: 30px;
  line-height: 1.5;
  color: #fff;
  margin-bottom: 16px;
}

@media (max-width: 799px) {
  .rov__title {
    font-size: 28px;
  }

  .rov__text {
    font-size: 15px;
  }

  .rov__big {
    font-size: 21px;
    letter-spacing: 0;
  }

  .rov__team {
    margin: 28px 0;
    padding: 24px 16px;
  }

  .rov__ito .photo {
    width: 132px;
  }

  .rov__ito-name {
    font-size: 24px;
  }

  .rov__ito-logo {
    width: 140px;
  }

  .rov__dive {
    margin: 28px 0;
  }

  .rov__nots {
    flex-direction: column;
    align-items: center;
    gap: 8px;
    margin: 32px 0;
  }

  .rov__nots li {
    width: 100%;
    max-width: 280px;
    font-size: 16px;
  }

  .rov__strong {
    font-size: 24px;
  }
}

/* ====================================================================
   深海探査は、ここまで来ている
   ==================================================================== */
.frontier {
  text-align: center;
  background: var(--mist-soft);
}

.frontier .section-title--center {
  margin-bottom: 24px;
}

.frontier__text {
  font-size: 17px;
}

.frontier__text+.frontier__text {
  margin-top: 12px;
}

.frontier__but {
  margin: 20px 0 8px;
  font-family: var(--font-head);
  font-size: 24px;
  color: var(--ink);
}

.frontier__steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 24px 0 8px;
}

.frontier__steps li {
  padding: 20px 8px;
  border-radius: 14px;
  background: #fff;
  border: 2px solid rgba(0, 127, 158, .2);
  font-family: var(--font-head);
  font-size: 18px;
  line-height: 1.4;
  color: var(--teal);
}

.frontier__big {
  margin: 8px 0 24px;
  font-family: var(--font-head);
  font-size: 36px;
  line-height: 1.4;
  color: var(--teal);
  letter-spacing: .03em;
}

.frontier__big--green {
  margin: 16px 0 0;
  color: var(--green);
}

.frontier__qs {
  display: grid;
  gap: 8px;
  max-width: 480px;
  margin: 16px auto 20px;
}

.frontier__qs li {
  padding: 12px 18px;
  border-radius: 12px;
  background: rgba(0, 127, 158, .07);
  font-family: var(--font-head-bold);
  font-size: 17px;
  line-height: 1.5;
  color: var(--teal);
}

.frontier__close {
  margin-top: 40px;
  padding: 32px 28px;
  border-radius: var(--radius);
  background: #fff;
  border: 2px solid var(--mist);
}

.frontier__close-title {
  font-family: var(--font-head);
  font-size: 34px;
  line-height: 1.4;
  color: var(--green);
  margin-bottom: 20px;
}

.frontier__names {
  font-family: var(--font-head);
  font-size: 22px;
  line-height: 1.5;
  color: var(--ink);
}

.frontier__names .en,
.frontier__axes .en {
  color: var(--yellow);
  -webkit-text-stroke: 1px var(--green);
  margin-inline: .2em;
}

.frontier__axes {
  margin: 6px 0 24px;
  font-family: var(--font-head-bold);
  font-size: 20px;
  line-height: 1.5;
  color: var(--teal);
}

.frontier .video {
  margin-top: 40px;
}

@media (max-width: 799px) {
  .frontier__text {
    font-size: 15px;
  }

  .frontier__but {
    font-size: 20px;
  }

  .frontier__steps {
    gap: 8px;
  }

  .frontier__steps li {
    padding: 14px 4px;
    font-size: 16px;
  }

  .frontier__big {
    font-size: 25px;
    letter-spacing: 0;
  }

  .frontier__qs li {
    font-size: 15px;
  }

  .frontier__close {
    margin-top: 32px;
    padding: 24px 16px;
  }

  .frontier__close-title {
    font-size: 20px;
  }

  .frontier__names {
    font-size: 18px;
  }

  .frontier__axes {
    font-size: 16px;
  }

  .frontier .video {
    margin-top: 28px;
  }
}

/* ====================================================================
   開催概要
   ==================================================================== */
.outline {
  background: var(--paper);
}

.outline__date {
  margin-top: 16px;
  font-family: var(--font-head);
  font-size: 28px;
  line-height: 1.4;
  color: var(--ink);
}

.outline__date .en {
  font-size: 1.4em;
  color: var(--teal);
  vertical-align: -.05em;
}

.outline__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
}

.day {
  border: 2px solid var(--mist);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
}

.day__head {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 28px;
  background: var(--mist);
}

.day__label {
  padding: 6px 14px;
  border-radius: 8px;
  background: var(--green);
  color: #fff;
  font-size: 17px;
  line-height: 1.3;
}

.day__kind {
  font-family: var(--font-head);
  font-size: 24px;
  line-height: 1.3;
  color: var(--green);
}

.day__photo {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.day__dl {
  display: grid;
  grid-template-columns: 5.5em 1fr;
  padding: 12px 28px 24px;
}

.day__dl dt,
.day__dl dd {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  line-height: 1.8;
}

.day__dl dt {
  font-family: var(--font-head-bold);
  color: var(--teal);
}

.day__dl dt:last-of-type,
.day__dl dd:last-of-type {
  border-bottom: 0;
}

.day__note {
  font-size: 14px;
  color: var(--ink-soft);
}

.day__map {
  display: inline-block;
  margin-top: 4px;
  font-size: 13px;
  color: var(--teal);
}

.price li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  padding: 6px 0;
}

.price li+li {
  border-top: 1px dashed var(--line);
}

.price__num {
  flex-shrink: 0;
  font-family: var(--font-head);
  font-size: 20px;
  color: var(--ink);
}

.price__num small {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 400;
  color: var(--ink-soft);
}

.outline__note {
  margin-top: 28px;
  text-align: center;
  color: var(--ink-soft);
}

.outline__cta {
  margin-top: 24px;
  text-align: center;
}

@media (max-width: 899px) {
  .outline__grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

@media (max-width: 799px) {
  .outline__date {
    font-size: 22px;
  }

  .day__head {
    padding: 14px 20px;
  }

  .day__kind {
    font-size: 20px;
  }

  .day__dl {
    grid-template-columns: 1fr;
    padding: 8px 20px 18px;
    font-size: 15px;
  }

  .day__dl dt {
    padding-bottom: 0;
    border-bottom: 0;
    font-size: 14px;
  }

  .day__dl dd {
    padding-top: 4px;
  }

  .price li {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
  }

  .price__num {
    font-size: 18px;
  }

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

/* ====================================================================
   登壇者紹介
   ==================================================================== */
.speakers {
  background: var(--mist);
}

.speaker-list {
  display: grid;
  gap: 24px;
}

.speaker {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 40px;
  align-items: start;
  padding: 28px;
  border-radius: var(--radius);
  background: #fff;
}

.speaker__role {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 999px;
  background: rgba(0, 127, 158, .1);
  color: var(--teal);
  font-family: var(--font-head-bold);
  font-size: 14px;
  line-height: 1.5;
  margin-bottom: 8px;
}

.speaker__name {
  font-family: var(--font-head);
  font-size: 30px;
  line-height: 1.3;
  color: var(--green);
  margin-bottom: 8px;
}

/* X（旧Twitter）リンク */
.speaker__x {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 16px;
  padding: 5px 12px 5px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--paper-soft);
  color: var(--ink);
  font-family: var(--font-en);
  font-size: 13px;
  line-height: 1.4;
  letter-spacing: .02em;
  text-decoration: none;
  transition: background-color .2s ease, color .2s ease, border-color .2s ease;
}

.speaker__x:hover,
.speaker__x:focus-visible {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
}

.speaker__x-icon {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.speaker__body p+p {
  margin-top: 12px;
}

.speaker__quote {
  padding: 12px 18px;
  border-left: 4px solid var(--yellow);
  background: var(--paper-soft);
  font-family: var(--font-head-bold);
  color: var(--ink);
  line-height: 1.9;
}

@media (max-width: 799px) {
  .speaker {
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 24px 20px;
  }

  .speaker__photo {
    max-width: 200px;
  }

  .speaker__name {
    font-size: 26px;
  }

  .speaker__body p {
    font-size: 15px;
  }
}

/* ====================================================================
   申込みCTA
   ==================================================================== */
.apply {
  text-align: center;
  color: var(--deep-text);
  background:
    radial-gradient(ellipse 70% 60% at 50% 0%, rgba(0, 160, 200, .3), transparent 70%),
    linear-gradient(180deg, var(--deep-2) 0%, var(--deep-1) 100%);
}

.apply__eyebrow {
  font-family: var(--font-head-bold);
  font-size: 18px;
  color: var(--yellow);
  margin-bottom: 8px;
}

.apply__title {
  font-family: var(--font-head);
  font-size: 40px;
  line-height: 1.4;
  color: #fff;
  margin-bottom: 24px;
}

.apply__days {
  display: inline-grid;
  gap: 6px;
  margin-bottom: 32px;
  padding: 18px 28px;
  border-radius: 14px;
  background: rgba(255, 255, 255, .07);
  border: 1px solid rgba(255, 255, 255, .14);
  font-family: var(--font-head-bold);
  font-size: 16px;
  line-height: 1.6;
  text-align: left;
}

.apply__days .en {
  display: inline-block;
  min-width: 4.2em;
  color: var(--yellow);
}

.apply__cta .btn--primary {
  border-color: var(--yellow);
  background: var(--yellow);
  color: var(--deep-1);
  box-shadow: 0 10px 30px rgba(255, 216, 61, .25);
}

.apply__cta .btn--primary:hover,
.apply__cta .btn--primary:focus-visible {
  background: #ffe46b;
  border-color: #ffe46b;
}

.apply__url {
  margin-top: 16px;
  font-size: 13px;
  color: var(--deep-muted);
  word-break: break-all;
}

@media (max-width: 799px) {
  .apply__title {
    font-size: 28px;
  }

  .apply__days {
    width: 100%;
    font-size: 14px;
    padding: 14px 18px;
  }
}

/* ====================================================================
   フッター（トップページ index.html のフッターと同じ見た目）
   濃いグレー #3a3840 ／ 文字 #f8f8f8 ／ 中央揃え ／ 横長ロゴ
   ロゴ画像 images/logo-footer.png はトップページのフッターを
   2倍解像度で描画して切り出したもの（背景色込み）。
   ==================================================================== */
.site-footer {
  padding: 52px 24px 56px;
  background: #3a3840;
  color: #f8f8f8;
  text-align: center;
  font-family: var(--font-body);
  line-height: 1.2;
}

.site-footer__logo {
  display: inline-block;
  margin-bottom: 16px;
}

.site-footer__logo img {
  width: 156px;
  height: auto;
}

.site-footer__block+.site-footer__block {
  margin-top: 16px;
}

.site-footer__label {
  font-size: 10px;
  line-height: 1.2;
}

.site-footer__org {
  font-family: "Noto Sans JP:Bold", var(--font-body);
  font-weight: 700;
  font-size: 12px;
  line-height: 1.2;
}

.site-footer__text {
  font-size: 12px;
  line-height: 1.2;
}

.site-footer__text a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.site-footer__mail {
  font-family: "Noto Sans JP:Bold", var(--font-body);
  font-weight: 700;
}

.site-footer__law {
  margin-top: 26px;
}

.site-footer__copy {
  margin-top: 22px;
  font-size: 10px;
  line-height: 1.2;
}

@media (max-width: 799px) {
  .site-footer {
    padding: 48px 20px 110px;
  }
}

/* ====================================================================
   モバイル用 追従CTA（799px以下のみ）
   ==================================================================== */
.sticky-cta {
  display: none;
}

@media (max-width: 799px) {
  .sticky-cta {
    display: block;
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 60;
    padding: 10px 16px calc(10px + env(safe-area-inset-bottom));
    background: rgba(255, 255, 255, .94);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-top: 1px solid var(--line);
  }

  .sticky-cta .btn {
    width: 100%;
    padding: 14px 20px;
    font-size: 16px;
  }
}

/* ---------- アクセシビリティ ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .btn {
    transition: none;
  }
}