@charset "utf-8";

/* ════════════════════════════════════════
   prospective.css — 募集ページ専用
   参照: rules/design_review_prospective.md
════════════════════════════════════════ */

/* ─── メイン: パンくずがヘッダー直下に来るよう上余白を確保 ─── */
.prospective-main {
  padding-top: calc(1.375rem + var(--header-h));
}

/* ─── パンくず（ヘッダー直下、背景はヒーローと一体・researchページに合わせる） ─── */
.prospective-main .breadcrumbs {
  position: relative;
  z-index: 1;
  background-color: transparent;
  padding: 0.625rem 0;
}

.breadcrumbs .container {
  margin-inline: auto;
  padding-inline: 1.25rem;
}

.prospective-main .breadcrumbs a,
.prospective-main .breadcrumbs span,
.prospective-main .breadcrumbs .breadcrumbs__sep {
  color: #222222;
  font-size: 0.75rem;
  font-family: var(--font-sans);
}

.prospective-main .breadcrumbs a {
  text-decoration: none;
}

.prospective-main .breadcrumbs a:hover {
  text-decoration: underline;
}

.breadcrumbs__sep {
  margin-inline: 0.25rem;
}

/* 募集ページのコンテンツ幅: 960px（researchページに合わせる） */
.prospective-hero__inner,
.prospective-hero__body,
.prospective-anchors .container,
.prospective-section .container {
  max-width: 60rem;
}

.prospective-main .breadcrumbs .container{
    max-width: 90vw;
}

/* ─── ヒーロー（背景はページトップから・researchページに合わせる） ─── */
.prospective-hero {
  position: relative;
  background-color: #2a2520;
  padding: 1rem 0 6rem 0;
  min-height: 28rem;
}

/* 背景画像：ページトップから開始（8.5rem 上に延長） */
.prospective-hero::before {
  content: "";
  position: absolute;
  top: -8.5rem;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url('../shared/prospective/bg_prospective.jpg');
  background-size: cover;
  background-position: center;
  z-index: 0;
}

.prospective-hero__inner {
  position: relative;
  z-index: 1;
  margin-inline: auto;
  padding-inline: 1.25rem;
  text-align: center;
}

/* ページタイトル（researchページに合わせる） */
.prospective-hero__title {
  font-family: var(--font-sans);
  font-size: 4.2rem;
  font-weight: 400;
  letter-spacing: 0.075rem;
  color: #222222;
  margin: 0 0 0.5rem;
  line-height: 1.2;
}

.prospective-hero__subtitle {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  color: #222222;
  margin: 0 0 4rem;
  letter-spacing: 0.4rem;
  font-weight: 600;
}

.prospective-hero__lead {
  font-family: var(--font-serif);
  font-size: var(--font-size-lg);
  letter-spacing: 0.0625rem;
  color: #222222;
  margin: 0;
  line-height: 2;
  max-width: 42rem;
  margin-inline: auto;
  font-weight: 600;
}

/* 本文（researchページに合わせる） */
.prospective-hero__body {
  position: relative;
  z-index: 1;
  text-align: left;
  margin-inline: auto;
  padding-top: 3rem;
  font-weight: 500;
}

.prospective-hero__body p {
  font-family: var(--font-serif);
  font-size: 1rem;
  letter-spacing: 0.075rem;
  color: #222222;
  line-height: 1.8;
  margin: 0 0 1.5rem;
}

.prospective-hero__body p:last-child {
  margin-bottom: 0;
}

/* ─── ページ内アンカー（デザイン画像完全再現） ─── */
.prospective-anchors {
  background-color: #FFFFFF;
  padding: 2rem 0 0 0;
}

.prospective-anchors .container {
  margin-inline: auto;
  padding-inline:1.25rem;
  border-bottom: 2px solid var(--color-navy);
  padding-bottom: 3.25rem;
}

.prospective-anchors__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem 1.5rem;
}

.prospective-anchors__grid .prospective-anchors_list a br{
  display: none;
}

.prospective-anchors__item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0;
  background-color: #FFFFFF;
  color: var(--color-navy);
  font-family: var(--font-serif);
  font-size: var(--font-size-md);
  font-weight: 600;
  text-decoration: none;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.prospective-anchors__item:hover {
  background-color: #284dfe;
  color: #FFFFFF;
  border-color: #284dfe;
}

.prospective-anchors__item:hover .prospective-anchors__icon {
  background-color: transparent;
}

.prospective-anchors__item p{
  display: none;
}

.prospective-anchors__text {
  flex: 1;
  min-width: 0;
}

.prospective-anchors__icon {
  flex-shrink: 0;
  width: 2rem;
  height: 2rem;
  background-color: var(--color-navy);
  background-image: url('../shared/prospective/fig_arrow_under.png');
  background-size: 1rem;
  background-position: center;
  background-repeat: no-repeat;
  transition: background-color 0.2s ease;
}

/*アンカーリンクリスト*/
.anchor_link{
    margin-inline: auto;
    max-width: 60rem;
    margin-top: 3rem;
    margin-bottom: 2rem;
    padding-inline: 1.25rem;
    padding-bottom: 2.25rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem 1.5rem;
}

.anchor_link li{}

.anchor_link li a{
    display: block;
    padding: 0 0 0 3rem;
    background-color: #FFFFFF;
    color: var(--color-navy);
    font-family: var(--font-serif);
    font-size: var(--font-size-md);
    font-weight: 600;
    height: 2rem;
    line-height: 2rem;
    text-decoration: none;
    transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
    position: relative;
}

.anchor_link li a::before{
    content:"";
    flex-shrink: 0;
    width: 2rem;
    height: 2rem;
    background-color: var(--color-navy);
    background-image: url(../shared/prospective/fig_arrow_under.png);
    background-size: 1rem;
    background-position: center;
    background-repeat: no-repeat;
    transition: background-color 0.2s ease;
    position: absolute;
    top: calc(50% - 1rem);
    left: 0;
}

.anchor_link li a:hover{
    background-color: #284dfe;
    color: #FFFFFF;
    border-color: #284dfe;
}

.anchor_link li a:hover::before{
    background-color: transparent;
}

/* ─── コンテンツセクション共通 ─── */
.prospective-section {
  background-color: #FFFFFF;
  margin-bottom: 2rem;
}

.prospective-section .container {
  margin-inline: auto;
  padding-inline: 1.25rem;
  padding: 2rem 1.5rem;
  border-top: 2px solid var(--color-navy);
}

.prospective-section__title {
  font-family: var(--font-sans);
  color: var(--color-navy);
  font-size: var(--font-size-xl);
  font-weight: 500;
  margin: 0 0 1.5rem;
}

.prospective-section__title[id^="anc_"]{
    padding-top: calc(2.375rem + var(--header-h));
    margin-top: calc(-2.375rem - var(--header-h));
}

.prospective-section__rule {
  border: none;
  margin: 0 0 1.5rem;
}

.prospective-section__lead {
  font-family: var(--font-sans);
  font-size: 1rem;
  color: #333333;
  line-height: 1.8;
  margin: 0 0 1.25rem;
}

.prospective-section p {
  font-family: var(--font-serif);
  font-size: 1rem;
  color: #333333;
  line-height: 1.8;
  margin: 0 0 1.25rem;
}

.prospective-section p:last-child {
  margin-bottom: 0;
}

.prospective-section__list {
  font-family: var(--font-serif);
  font-size: 1rem;
  color: #333333;
  line-height: 1.8;
  margin: 0 0 1.25rem;
}

.prospective-section__list li {
  padding-left: 1rem;
  margin-bottom: 0.1em;
  position: relative;
}

.prospective-section__list li::before{
  content: "";
  width: 0.25rem;
  height: 0.25rem;
  background: #222;
  border-radius: 50%;
  position: absolute;
  top: calc(50% - 0.125rem);
  left: 0.2rem;
}

.prospective-section__ol {
  font-family: var(--font-sans);
  font-size: 1rem;
  color: #333333;
  line-height: 1.8;
  margin: 0 0 1.25rem;
  padding-left: 1.5rem;
}

.prospective-section__ol li {
  margin-bottom: 1rem;
}

.prospective-section__subtitle {
  font-family: var(--font-sans);
  font-size: 1.125rem;
  font-weight: 700;
  color: #333333;
  margin: 1.5rem 0 0.75rem;
}

.prospective-section__subtitle:first-of-type {
  margin-top: 0;
}

/* 主な研究室活動：2カラム（左右の見出しを同行で揃える） */
.prospective-section__twocol {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem 3rem;
  align-items: start;
}

.prospective-section__item {
  min-width: 0;
}

.prospective-section__act {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 700;
  color: #333333;
  margin: 0 0 0.5rem;
}

.prospective-section__item p {
  margin: 0 0 0.75rem;
}

.prospective-section__item p:last-child {
  margin-bottom: 0;
}

/* ─── 中間ビジュアル ─── */
.prospective-visual {
  width: 100%;
  overflow: hidden;
  margin-bottom: 3rem;
}

.prospective-visual__img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  max-height: 28rem;
}

/* 研究のはじめ方セクション：下線なし */
#section-hajime.prospective-section .container {
  border-bottom: none;
}

/* 最後にセクション：下線なし */
#final-section.prospective-section .container {
  border-bottom: none;
}

/* ─── レスポンシブ ─── */
@media (max-width: 47.9375rem) {
  .prospective-hero__title {
    font-size: 2.25rem;
  }
  .prospective-hero__subtitle {
    font-size: 1.125rem;
  }
  .prospective-hero__lead {
    font-size: 1rem;
  }
  .prospective-anchors__grid {
    grid-template-columns: 1fr;
  }
  .prospective-section__twocol {
    grid-template-columns: 1fr;
  }
}

/* ##########SP########## */
@media screen and (min-width:1px) and (max-width:479px) {
  .prospective-main .breadcrumbs{
    padding: 0;
  }

  .prospective-main .breadcrumbs .container{
    padding-inline: 0;
  }

  .prospective-hero__title{
    font-size: 2.7rem;
    margin: 0 0 0.3rem;
  }

  .prospective-hero__subtitle{
    margin: 0 0 2rem;
  }

  .prospective-hero__lead{
    font-size: 1.1rem;
    line-height: 1.8;
  }

  .prospective-hero__body p{
    font-size: 0.9rem;
  }

  .prospective-hero__body{
    max-width: 90vw;
  }

  .anchor_link{
      display: grid;
      grid-template-columns: 1fr;
      gap: 0.5rem;
  }

  .prospective-section .container{
    margin: 0 5vw 2rem 5vw;
    padding: 1.5rem 0.5rem;
  }

}