/* ── ANIMATIONS ── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}
.hero-eyebrow { animation: fadeUp 0.6s ease both; }
.hero-h1 { animation: fadeUp 0.6s 0.1s ease both; }
.hero-desc { animation: fadeUp 0.6s 0.2s ease both; }
.hero-actions { animation: fadeUp 0.6s 0.3s ease both; }

/* ── SECTIONS ── */
section { padding: 96px 48px; }

.section-rule {
  display: flex; align-items: center; gap: 16px; margin-bottom: 56px;
}
.section-num {
  font-family: var(--sans); font-size: 11px; font-weight: 600;
  letter-spacing: 0.12em; color: var(--accent);
  background: var(--accent-light); padding: 3px 10px; border-radius: 100px;
}
.section-rule hr { flex: 1; border: none; border-top: 1px solid var(--border); }
.section-tag {
  font-family: var(--sans); font-size: 11px; font-weight: 600;
  letter-spacing: 0.12em; color: var(--ink-faint); text-transform: uppercase;
}

h1, h2, h3 { font-family: var(--sans); font-weight: 700; }

/* ── HERO ── */
#hero {
  min-height: 80vh; display: flex; flex-direction: column;
  justify-content: center; padding: 80px 48px 64px;
  background: linear-gradient(135deg, var(--accent-pale) 0%, #ffffff 50%, var(--accent-lighter) 100%);
  position: relative; overflow: hidden;
}
#hero::before {
  content: ''; position: absolute; top: -200px; right: -200px;
  width: 700px; height: 700px; border-radius: 50%;
  background: radial-gradient(circle, rgba(var(--accent-rgb),0.07) 0%, transparent 65%);
  pointer-events: none;
}
#hero::after {
  content: ''; position: absolute; bottom: -100px; left: 10%;
  width: 400px; height: 400px; border-radius: 50%;
  background: radial-gradient(circle, rgba(var(--accent-rgb),0.04) 0%, transparent 70%);
  pointer-events: none;
}

.hero-eyebrow {
  font-family: var(--sans); font-size: 12px; font-weight: 600;
  letter-spacing: 0.15em; color: var(--accent);
  margin-bottom: 24px; display: flex; align-items: center; gap: 10px;
  text-transform: uppercase;
}
.hero-eyebrow::before {
  content: ''; display: inline-block; width: 24px; height: 2px;
  background: var(--accent); border-radius: 2px;
}

.hero-h1 {
  font-family: var(--sans); font-size: clamp(36px, 5.5vw, 68px);
  font-weight: 700; line-height: 1.15; letter-spacing: -0.02em;
  max-width: 680px; margin-bottom: 28px; color: var(--ink);
}
.hero-h1 em { font-style: normal; color: var(--accent); }

.hero-desc {
  font-size: 16px; color: var(--ink-light);
  max-width: 460px; line-height: 1.8; margin-bottom: 44px;
}

.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--accent); color: #fff; text-decoration: none;
  font-family: var(--sans); font-size: 14px; font-weight: 600;
  padding: 13px 28px; border-radius: var(--radius-sm);
  transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
  box-shadow: 0 2px 8px rgba(var(--accent-rgb),0.25);
}
.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(var(--accent-rgb),0.3);
}

.btn-secondary {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1.5px solid var(--border); color: var(--ink); text-decoration: none;
  font-family: var(--sans); font-size: 14px; font-weight: 600;
  padding: 13px 28px; border-radius: var(--radius-sm);
  transition: all 0.2s; background: var(--bg);
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-light); }
.btn-secondary.is-disabled { cursor: not-allowed; opacity: 0.55; pointer-events: none; }

/* 詳細ページへの遷移 CTA (ダーク solid)。App Store / Google Play より情報階層が上。 */
.btn-detail {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--ink); color: #fff; text-decoration: none;
  font-family: var(--sans); font-size: 13px; font-weight: 700;
  letter-spacing: 0.02em;
  padding: 11px 22px; border-radius: var(--radius-sm);
  transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}
.btn-detail:hover {
  background: #000;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.22);
}

.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

.hero-meta {
  position: absolute; bottom: 48px; right: 48px; text-align: right;
  font-size: 11px; color: var(--ink-faint); line-height: 1.9;
}

/* ── OVERVIEW CARDS ── */
.card-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }

.card {
  background: var(--bg-card); padding: 32px 28px;
  border-radius: var(--radius); border: 1px solid var(--border);
  box-shadow: var(--shadow); transition: box-shadow 0.2s, transform 0.2s;
}
.card:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }

.card-icon {
  font-family: var(--sans); font-size: 11px; font-weight: 600;
  letter-spacing: 0.1em; color: var(--accent);
  background: var(--accent-light); display: inline-block;
  padding: 4px 10px; border-radius: 100px; margin-bottom: 18px;
}

.card h3 { font-size: 16px; font-weight: 700; margin-bottom: 10px; }
.card p { font-size: 14px; color: var(--ink-light); line-height: 1.75; }

/* ── ABOUT ── */
#about { border-bottom: 1px solid var(--border); }

.about-lead {
  font-family: var(--sans); font-size: clamp(20px, 2.8vw, 28px);
  font-weight: 600; line-height: 1.5; max-width: 620px;
  margin-bottom: 56px; color: var(--ink); letter-spacing: -0.01em;
}

.mvv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; margin-bottom: 72px; }

.mvv-label {
  font-family: var(--sans); font-size: 11px; font-weight: 700;
  letter-spacing: 0.1em; color: var(--accent); text-transform: uppercase;
  margin-bottom: 14px; display: flex; align-items: center; gap: 10px;
}
.mvv-label::after { content: ''; flex: 1; height: 1px; background: var(--border); }
.mvv-item p { font-size: 14px; color: var(--ink-light); line-height: 1.85; }

.company-table {
  width: 100%; border-collapse: collapse; font-size: 14px; max-width: 680px;
  border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--border);
}
.company-table th, .company-table td {
  padding: 14px 20px; text-align: left; border-bottom: 1px solid var(--border);
}
.company-table tr:last-child th, .company-table tr:last-child td { border-bottom: none; }
.company-table th {
  font-family: var(--sans); font-size: 12px; font-weight: 600;
  color: var(--ink-faint); width: 160px; vertical-align: top;
  background: var(--bg-soft);
}

/* ── WHAT WE DO ── */
#what { border-bottom: 1px solid var(--border); background: var(--bg-soft); }

/* 多層カード構造 */
.pillar-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.pillar-card {
  background: var(--bg-card); border-radius: var(--radius);
  border: 1px solid var(--border); box-shadow: var(--shadow);
  overflow: hidden; transition: box-shadow 0.2s, transform 0.2s;
}
.pillar-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }

.pillar-header {
  background: var(--accent); padding: 28px 28px 24px;
  position: relative;
}
.pillar-header--shade2 { background: var(--accent-hover); }
.pillar-header--shade3 { background: var(--accent-text); }
.pillar-badge {
  font-family: var(--sans); font-size: 10px; font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: rgba(255,255,255,0.7); margin-bottom: 10px;
}
.pillar-concept {
  color: #d4a000;
  font-weight: 700;
  letter-spacing: 0.1em;
}
.pillar-title {
  font-family: var(--sans); font-size: 20px; font-weight: 700;
  color: #ffffff; line-height: 1.3; margin-bottom: 8px;
}
.pillar-sub {
  font-size: 12px; color: rgba(255,255,255,0.75); line-height: 1.65;
}

.pillar-body { padding: 20px 20px 24px; }

.inner-card {
  background: var(--bg-soft); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 16px 18px;
  margin-bottom: 10px;
}
.inner-card:last-child { margin-bottom: 0; }
.inner-card-label {
  font-family: var(--sans); font-size: 10px; font-weight: 700;
  letter-spacing: 0.1em; color: var(--accent);
  background: var(--accent-light); display: inline-block;
  padding: 2px 8px; border-radius: 100px; margin-bottom: 8px;
}
.inner-card h4 {
  font-family: var(--sans); font-size: 13px; font-weight: 700;
  color: var(--ink); margin-bottom: 5px;
}
.inner-card p { font-size: 12px; color: var(--ink-light); line-height: 1.7; }

/* ── MEMBERS ── */
#members { border-bottom: 1px solid var(--border); }

.member-section-title {
  font-family: var(--sans); font-size: 11px; font-weight: 700;
  letter-spacing: 0.1em; color: var(--ink-faint);
  text-transform: uppercase; margin-bottom: 28px; margin-top: 56px;
  padding-bottom: 10px; border-bottom: 1px solid var(--border);
}

.member-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 24px; margin-bottom: 16px;
}

.member-card { display: flex; flex-direction: column; gap: 6px; }
.member-card__link {
  display: block; text-decoration: none; color: inherit;
}
.member-card__image {
  width: 72px; height: 72px; border-radius: 50%;
  object-fit: cover; object-position: center top;
  border: 1px solid var(--border);
  margin-bottom: 8px;
  display: block;
}
.member-card--sans .member-card__image {
  border: 2px solid var(--border);
}
.member-card .member-name { transition: color 0.2s; }
.member-card__detail-link {
  font-family: var(--mono); font-size: 10px;
  letter-spacing: 0.15em;
  color: var(--accent);
  margin-top: 8px;
}
.member-card--sans .member-card__detail-link {
  font-family: var(--sans); font-size: 11px;
  font-weight: 600;
  letter-spacing: normal;
  margin-top: 6px;
}

.member-avatar {
  width: 72px; height: 72px; border-radius: 50%;
  background: var(--accent-light); border: 2px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--sans); font-size: 20px; font-weight: 700;
  color: var(--accent); margin-bottom: 8px;
}

.member-name { font-family: var(--sans); font-size: 15px; font-weight: 600; }
.member-affil { font-size: 12px; color: var(--ink-faint); line-height: 1.5; }

.supervisor-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; max-width: 560px; }

.supervisor-card {
  padding: 24px; border-radius: var(--radius); border: 1px solid var(--border);
  background: var(--bg-soft);
}
.supervisor-role {
  font-family: var(--sans); font-size: 10px; font-weight: 700;
  letter-spacing: 0.12em; color: var(--accent); text-transform: uppercase; margin-bottom: 10px;
}

/* ── EVENTS ── */
#events { border-bottom: 1px solid var(--border); background: var(--bg-soft); }

.event-list { display: flex; flex-direction: column; gap: 12px; }
.event-item__link { display: block; text-decoration: none; color: inherit; }

.event-item {
  background: var(--bg); padding: 24px 28px;
  border-radius: var(--radius); border: 1px solid var(--border);
  display: grid; grid-template-columns: 110px 1fr auto;
  gap: 20px; align-items: start;
  transition: box-shadow 0.2s;
  cursor: pointer;
}
.event-item:hover { box-shadow: var(--shadow); }

.event-date { font-size: 12px; font-weight: 500; color: var(--ink-faint); padding-top: 3px; }

.event-title { font-family: var(--sans); font-size: 16px; font-weight: 600; margin-bottom: 5px; }
.event-meta { font-size: 12px; color: var(--ink-faint); }
.event-meta + .event-meta { margin-top: 6px; }

.event-badge {
  font-family: var(--sans); font-size: 11px; font-weight: 600;
  letter-spacing: 0.05em; padding: 4px 12px; border-radius: 100px; white-space: nowrap;
}
.badge-active { color: var(--success); background: #f0fdf4; border: 1px solid #bbf7d0; }
.badge-ended { color: var(--ink-faint); background: var(--bg-soft); border: 1px solid var(--border); }

/* TOP セクション末尾の「すべて見る →」リンク (EVENTS / PROJECTS 共通) */
.section-view-all { margin-top: 24px; text-align: right; }
.section-view-all a {
  font-family: var(--sans); font-size: 12px; font-weight: 600;
  letter-spacing: 0.05em; color: var(--ink-light);
  text-decoration: none; border-bottom: 1px solid var(--border);
  padding-bottom: 2px; transition: color 0.2s, border-color 0.2s;
}
.section-view-all a:hover { color: var(--accent); border-color: var(--accent); }

/* ── PROJECTS ── */
#projects { border-bottom: 1px solid var(--border); }

.project-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }

.project-card {
  background: var(--bg); padding: 28px;
  border-radius: var(--radius); border: 1px solid var(--border);
  box-shadow: var(--shadow); transition: box-shadow 0.2s, transform 0.2s;
}
.project-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }

.project-category {
  font-family: var(--sans); font-size: 10px; font-weight: 700;
  letter-spacing: 0.12em; color: var(--accent); text-transform: uppercase; margin-bottom: 10px;
}

.project-title { font-family: var(--sans); font-size: 16px; font-weight: 700; margin-bottom: 10px; line-height: 1.4; }
.project-desc { font-size: 13px; color: var(--ink-light); line-height: 1.75; margin-bottom: 18px; }

.project-specs {
  display: flex; flex-wrap: wrap; gap: 12px;
  font-size: 12px; color: var(--ink-faint);
  border-top: 1px solid var(--border); padding-top: 14px;
}

.project-status {
  font-family: var(--sans); font-size: 11px; font-weight: 600;
  letter-spacing: 0.05em; padding: 3px 10px; border-radius: 100px; margin-bottom: 14px; display: inline-block;
}
.status-active { background: #f0fdf4; color: var(--success); border: 1px solid #bbf7d0; }
.status-ended { background: var(--bg-soft); color: var(--ink-faint); border: 1px solid var(--border); }

/* ── APP ── */
#app { border-bottom: 1px solid var(--border); background: var(--bg-soft); }

.app-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }

.app-feature-list { margin-top: 28px; }
.app-feature { padding: 18px 0; border-bottom: 1px solid var(--border); }
.app-feature:last-child { border-bottom: none; }
.app-feature-label {
  font-family: var(--sans); font-size: 13px; font-weight: 700;
  color: var(--accent); margin-bottom: 6px;
}
.app-feature p { font-size: 13px; color: var(--ink-light); line-height: 1.75; }

.app-store-links { display: flex; gap: 12px; margin-top: 28px; }

.course-list-card { background: var(--bg-card); border: 1px solid var(--border); padding: 32px; }
.course-list-card-label {
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.2em;
  color: var(--ink-faint); margin-bottom: 16px;
}
.course-list { list-style: none; margin: 0; padding: 0; }
.course-list li {
  font-size: 13px; padding: 12px 0;
  border-bottom: 1px solid var(--border);
}
.course-list li:last-child { border-bottom: none; }

/* ── ARTICLES ── */
#articles { border-bottom: 1px solid var(--border); background: var(--bg-soft); }

.article-filters { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 36px; }

/* TOP の panel 切替 (article-filter.js が data-panel-slug で表示制御) */
.article-panel[hidden] { display: none; }

.filter-btn {
  font-family: var(--sans); font-size: 13px; font-weight: 500;
  padding: 7px 16px; border-radius: 100px;
  border: 1.5px solid var(--border); background: var(--bg);
  cursor: pointer; color: var(--ink-light); transition: all 0.15s;
  text-decoration: none; display: inline-block;
}
.filter-btn.active, .filter-btn:hover {
  background: var(--accent); border-color: var(--accent); color: white;
}

.article-empty { font-size: 14px; color: var(--ink-faint); padding: 36px 0; border-top: 1px solid var(--border); }

/* ── ARTICLE CARD (section-articles.php / archive-article.php) ── */
.article-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
  margin-bottom: 24px;
}

.article-card {
  display: flex; flex-direction: column;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
  text-decoration: none; color: inherit;
  transition: box-shadow 0.2s, transform 0.2s;
}
.article-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.article-card[hidden] { display: none; }  /* JS フィルタ用 */

.article-card-image { aspect-ratio: 16 / 9; overflow: hidden; background: var(--bg-soft); }
.article-card-image img { width: 100%; height: 100%; object-fit: cover; display: block; }
.article-card-image-placeholder {
  width: 100%; height: 100%;
  background: linear-gradient(135deg, var(--bg-soft) 0%, var(--border) 100%);
}

.article-card-body { padding: 20px 22px 22px; display: flex; flex-direction: column; flex: 1; }

.article-card-category {
  font-family: var(--sans); font-size: 10px; font-weight: 700;
  letter-spacing: 0.12em; color: var(--accent);
  text-transform: uppercase; margin-bottom: 10px;
}

.article-card-title {
  font-family: var(--sans); font-size: 16px; font-weight: 700;
  line-height: 1.5; margin: 0 0 12px; color: var(--ink);
}

.article-card-excerpt {
  font-size: 13px; color: var(--ink-light); line-height: 1.75;
  margin: 0 0 16px; flex: 1;
}

.article-card-date {
  font-family: var(--sans); font-size: 11px; color: var(--ink-faint);
  letter-spacing: 0.03em;
}

/* ── CONTACT ── */
#contact {}

.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; max-width: 840px; }

.contact-card {
  background: var(--bg); padding: 36px 32px;
  border-radius: var(--radius); border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.contact-role {
  font-family: var(--sans); font-size: 11px; font-weight: 700;
  letter-spacing: 0.1em; color: var(--accent); text-transform: uppercase; margin-bottom: 14px;
}
.contact-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 14px; }
.contact-card p { font-size: 14px; color: var(--ink-light); line-height: 1.8; margin-bottom: 18px; }

.contact-features { list-style: none; margin-bottom: 24px; }
.contact-features li {
  font-size: 13px; color: var(--ink-light);
  padding: 7px 0; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 8px;
}
.contact-features li::before { content: '✓'; color: var(--accent); font-weight: 700; font-size: 12px; }

/* ── STUDENT CONTACT FORM ── */
#student-contact { max-width: 840px; }
#student-contact .form-block { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 40px; box-shadow: var(--shadow); }
#student-contact .form-row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 14px; }
#student-contact .form-group { display: flex; flex-direction: column; gap: 6px; }
#student-contact .flabel { font-size: 11px; font-weight: 500; color: var(--ink-light); letter-spacing: 0.03em; }
#student-contact .flabel span { color: #d32f2f; margin-left: 3px; }
#student-contact .finput,
#student-contact .fselect,
#student-contact .ftextarea { background: #f8f9fa; border: 1px solid var(--border); border-radius: var(--radius-sm, 8px); padding: 11px 14px; font-family: var(--body); font-size: 14px; color: var(--ink); outline: none; transition: border-color 0.2s, background 0.2s; width: 100%; }
#student-contact .finput::placeholder,
#student-contact .ftextarea::placeholder { color: rgba(0,0,0,0.25); }
#student-contact .finput:focus,
#student-contact .fselect:focus,
#student-contact .ftextarea:focus { border-color: var(--accent); background: #fff; }
#student-contact .fselect { color: var(--ink-light); cursor: pointer; }
#student-contact .ftextarea { resize: vertical; min-height: 110px; }
#student-contact .fsubmit { width: 100%; margin-top: 20px; display: flex; align-items: center; justify-content: center; gap: 8px; background: var(--accent); color: #fff; font-family: var(--body); font-size: 14px; font-weight: 700; padding: 14px 32px; border-radius: var(--radius-sm, 8px); border: 2px solid var(--accent); cursor: pointer; transition: opacity 0.2s, transform 0.15s, box-shadow 0.2s; box-shadow: 0 4px 16px rgba(0,0,0,0.08); }
#student-contact .fsubmit:hover { opacity: 0.9; transform: translateY(-1px); }
#student-contact .form-note { font-size: 11px; color: var(--ink-light); text-align: center; margin-top: 12px; }

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  section { padding: 64px 24px; }
  #hero { padding: 60px 24px 48px; min-height: 60vh; }
  .hero-meta { display: none; }
  .card-grid-3, .mvv-grid, .pillar-grid, .features-grid { grid-template-columns: repeat(2, 1fr); }
  .project-grid, .contact-grid, .app-layout, .supervisor-grid { grid-template-columns: 1fr; }
  .article-grid { grid-template-columns: repeat(2, 1fr); }
  .event-item { grid-template-columns: 1fr; gap: 8px; }
  #student-contact .form-block { padding: 24px 18px; }
  #student-contact .form-row2 { grid-template-columns: 1fr; }
}

@media (max-width: 500px) {
  section { padding: 48px 16px; }
  #hero { padding: 48px 16px 36px; }
  .card-grid-3, .mvv-grid, .pillar-grid, .features-grid { grid-template-columns: 1fr; }
  .article-grid { grid-template-columns: 1fr; }
  .member-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 16px; }
  .company-table th,
  .company-table td {
    display: block;
    width: 100%;
    padding: 8px 16px;
  }
  .company-table th {
    padding-bottom: 4px;
    border-bottom: none;
  }
}