/* 下層ページ（各回の講義ページ・講義一覧）用。style.css の後に読み込む */

.page-hero {
  position: relative; overflow: hidden; color: var(--white);
  padding: calc(var(--header-height) + 64px) 0 64px;
  background: radial-gradient(circle at 85% 20%, rgba(58, 96, 150, 0.7), transparent 34%),
    linear-gradient(135deg, #0f1d33 0%, #16294a 55%, #0b1628 100%);
}
.page-hero::after {
  content: ""; position: absolute; width: 36vw; max-width: 520px; aspect-ratio: 1;
  right: -8%; top: -30%; border: 1px solid rgba(255, 200, 87, 0.22); border-radius: 50%;
}
.page-hero .container { position: relative; z-index: 2; }
.breadcrumb { margin: 0 0 26px; padding: 0; list-style: none; display: flex; flex-wrap: wrap; gap: 10px; font-size: 11px; color: rgba(255,255,255,.6); letter-spacing: .06em; }
.breadcrumb li + li::before { content: "/"; margin-right: 10px; opacity: .4; }
.breadcrumb a { border-bottom: 1px solid rgba(255,255,255,.28); }
.breadcrumb a:hover, .breadcrumb a:focus-visible { color: var(--accent); border-bottom-color: var(--accent); }
.page-hero .eyebrow { margin-bottom: 18px; }
.page-hero h1 {
  margin: 0; max-width: 980px; font-family: var(--serif); font-size: clamp(32px, 4.2vw, 54px);
  font-weight: 500; line-height: 1.25; letter-spacing: -.04em; text-wrap: balance;
}
.page-hero h1 small { display: block; margin-bottom: 10px; font-family: var(--sans); font-size: clamp(13px, 1.4vw, 16px); font-weight: 700; letter-spacing: .08em; color: rgba(255,255,255,.7); }
.page-lead { max-width: 720px; margin: 24px 0 0; color: rgba(255,255,255,.76); font-size: clamp(14px, 1.4vw, 16px); line-height: 2; }
.page-meta { margin: 30px 0 0; padding: 0; list-style: none; display: flex; flex-wrap: wrap; gap: 8px; }
.page-meta li {
  padding: 5px 13px; border: 1px solid rgba(255,255,255,.26); border-radius: 100px;
  color: rgba(255,255,255,.82); font-size: 11px; font-weight: 700; letter-spacing: .04em;
}
.page-meta li.is-accent { color: var(--ink); background: var(--accent); border-color: var(--accent); }

/* Lecture layout */
.lecture-layout {
  padding: clamp(56px, 7vw, 96px) 0 clamp(72px, 9vw, 120px);
  display: grid; grid-template-columns: 230px minmax(0, 1fr); gap: clamp(40px, 6vw, 96px); align-items: start;
}
.lecture-aside { position: sticky; top: 110px; display: grid; gap: 28px; }
.aside-label { margin: 0 0 10px; color: var(--ink-soft); font-size: 10px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.aside-toc { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--ink); font-size: 13px; }
.aside-toc li { border-bottom: 1px solid var(--line); }
.aside-toc a { display: grid; grid-template-columns: 28px 1fr; gap: 8px; padding: 10px 2px; font-weight: 600; transition: color 160ms ease; }
.aside-toc a span { color: var(--coral); font-family: var(--serif); font-size: 12px; }
.aside-toc a:hover, .aside-toc a:focus-visible { color: var(--coral); }
.aside-nav { display: grid; gap: 8px; font-size: 12px; }
.aside-nav a {
  display: grid; gap: 2px; padding: 12px 14px; background: var(--white); border-left: 3px solid var(--line);
  transition: border-color 160ms ease, transform 160ms ease;
}
.aside-nav a:hover, .aside-nav a:focus-visible { border-left-color: var(--accent); transform: translateX(3px); }
.aside-nav a small { color: var(--ink-soft); font-size: 9px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.aside-nav a b { font-size: 12px; line-height: 1.5; }
.aside-nav a.is-disabled { color: var(--ink-soft); opacity: .55; pointer-events: none; }

.lecture-body { display: grid; gap: clamp(48px, 6vw, 80px); }
.block { display: grid; gap: 18px; }
.block-label { margin: 0; color: var(--ink-soft); font-size: 10px; font-weight: 800; letter-spacing: .18em; text-transform: uppercase; }
.block h2 { margin: 0; font-family: var(--serif); font-size: clamp(26px, 3vw, 36px); font-weight: 500; line-height: 1.3; letter-spacing: -.03em; }
.block p { margin: 0; font-size: 14px; color: var(--ink-soft); }
.block p.lead { color: var(--ink); font-size: 15px; }
.block ul.plain { margin: 0; padding-left: 1.2em; font-size: 14px; color: var(--ink-soft); display: grid; gap: 6px; }
.block ul.plain li::marker { color: var(--coral); }

.goal-list { margin: 0; padding: 0; list-style: none; display: grid; gap: 12px; }
.goal-list li {
  padding: 18px 22px; display: grid; grid-template-columns: 34px 1fr; gap: 14px; align-items: start;
  background: var(--white); border-left: 3px solid var(--accent); box-shadow: 0 8px 28px rgba(15,29,51,.05); font-size: 14px;
}
.goal-list li span { color: var(--coral); font-family: var(--serif); font-size: 16px; padding-top: 2px; }

.keyword-list { margin: 0; padding: 0; list-style: none; display: flex; flex-wrap: wrap; gap: 8px; }
.keyword-list li {
  padding: 6px 14px; color: var(--ink); background: var(--white); border: 1px solid var(--line);
  border-radius: 100px; font-size: 12px; font-weight: 700; letter-spacing: .03em;
}

.flow-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--ink); counter-reset: flow; }
.flow-list > li {
  counter-increment: flow; padding: 24px 0; display: grid; grid-template-columns: 60px minmax(0, 1fr); gap: 16px 20px;
  border-bottom: 1px solid var(--line);
}
.flow-list > li::before {
  content: "0" counter(flow); color: var(--coral); font-family: var(--serif); font-size: 20px; line-height: 1.2; padding-top: 4px;
}
.flow-list h3 { margin: 0 0 8px; font-size: 17px; letter-spacing: .02em; line-height: 1.5; }
.flow-list p { margin: 0; color: var(--ink-soft); font-size: 13px; }
.flow-list ul { margin: 10px 0 0; padding-left: 1.2em; color: var(--ink-soft); font-size: 13px; display: grid; gap: 4px; }
.flow-list ul li::marker { color: var(--accent); }
.flow-time { display: inline-block; margin-left: 10px; color: var(--ink-soft); font-size: 11px; font-weight: 600; letter-spacing: .04em; vertical-align: 2px; }

.think-box { padding: 28px 30px; color: var(--white); background: var(--ink); border-top: 3px solid var(--accent); display: grid; gap: 14px; }
.think-box .block-label { color: var(--accent); }
.think-box h3 { margin: 0; font-family: var(--serif); font-size: clamp(20px, 2.2vw, 26px); font-weight: 500; line-height: 1.5; }
.think-box p { color: rgba(255,255,255,.74); font-size: 13px; }
.think-box ol { margin: 4px 0 0; padding-left: 1.3em; color: rgba(255,255,255,.86); font-size: 13px; display: grid; gap: 6px; }
.think-box ol li::marker { color: var(--accent); font-weight: 700; }
.think-box .think-note { padding-top: 12px; border-top: 1px solid rgba(255,255,255,.16); color: rgba(255,255,255,.56); font-size: 11px; }

.reading-list { margin: 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.reading-list li { padding: 14px 18px; background: var(--white); border-left: 3px solid var(--line); font-size: 13px; }
.reading-list li b { display: block; font-size: 13px; }
.reading-list li span { color: var(--ink-soft); font-size: 12px; }
.reading-list a { border-bottom: 1px solid var(--ink); }
.reading-list a:hover, .reading-list a:focus-visible { color: var(--coral); border-bottom-color: var(--coral); }

.review-box { padding: 22px 24px; background: var(--white); border-left: 3px solid var(--coral); box-shadow: 0 8px 28px rgba(15,29,51,.05); }
.review-box .block-label { margin-bottom: 10px; }
.review-box ul { margin: 0; padding-left: 1.2em; font-size: 13px; color: var(--ink-soft); display: grid; gap: 6px; }

.pager { margin-top: clamp(40px, 5vw, 64px); padding-top: 28px; border-top: 1px solid var(--ink); display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.pager a { display: grid; gap: 4px; padding: 18px 20px; background: var(--white); border-top: 3px solid var(--line); transition: transform 160ms ease, box-shadow 160ms ease; }
.pager a:hover, .pager a:focus-visible { transform: translateY(-3px); box-shadow: var(--shadow); border-top-color: var(--accent); }
.pager a.pager-next { text-align: right; }
.pager a small { color: var(--ink-soft); font-size: 9px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.pager a b { font-size: 14px; line-height: 1.5; }
.pager a.is-disabled { opacity: .5; pointer-events: none; }

/* Lecture index */
.lecture-index { padding: clamp(56px, 7vw, 96px) 0 clamp(72px, 9vw, 120px); }
.lecture-cards { margin: 0; padding: 0; list-style: none; display: grid; gap: 18px; }
.lecture-card {
  display: grid; grid-template-columns: 120px minmax(0, 1fr) auto; gap: 24px; align-items: center;
  padding: 28px 32px; color: var(--ink); background: var(--white); border-top: 3px solid var(--ink);
  box-shadow: 0 8px 28px rgba(15,29,51,.05); transition: transform 200ms ease, box-shadow 200ms ease;
}
.lecture-card:hover, .lecture-card:focus-visible { transform: translateY(-4px); box-shadow: var(--shadow); border-top-color: var(--accent); }
.lecture-card .lecture-no { display: grid; gap: 2px; }
.lecture-card .lecture-no b { font-family: var(--serif); font-size: 30px; font-weight: 500; line-height: 1; letter-spacing: -.03em; }
.lecture-card .lecture-no small { color: var(--ink-soft); font-size: 9px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.lecture-card .lecture-date { margin-top: 6px; color: var(--coral); font-family: var(--serif); font-size: 14px; letter-spacing: .02em; }
.lecture-card h3 { margin: 0 0 6px; font-size: 18px; letter-spacing: .02em; line-height: 1.5; }
.lecture-card p { margin: 0; color: var(--ink-soft); font-size: 13px; }
.lecture-card .resource-cta { margin-top: 0; }

@media (max-width: 980px) {
  .lecture-layout { grid-template-columns: 1fr; gap: 48px; }
  .lecture-aside { position: static; grid-template-columns: 1fr 1fr; align-items: start; }
}
@media (max-width: 680px) {
  .page-hero { padding-top: calc(var(--header-height) + 40px); padding-bottom: 48px; }
  .lecture-aside { grid-template-columns: 1fr; }
  .flow-list > li { grid-template-columns: 1fr; gap: 6px; }
  .flow-list > li::before { font-size: 16px; }
  .think-box { padding: 22px 20px; }
  .pager { grid-template-columns: 1fr; }
  .pager a.pager-next { text-align: left; }
  .lecture-card { grid-template-columns: 1fr; gap: 14px; padding: 24px 22px; }
}

/* Attendance quiz（attendance/ 配下） */
.attendance-steps { margin: 0 0 clamp(40px, 5vw, 64px); padding: 0; list-style: none; display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.attendance-steps li {
  padding: 22px 24px; display: grid; grid-template-columns: 34px 1fr; gap: 14px; align-items: start;
  background: var(--white); border-top: 3px solid var(--accent); box-shadow: 0 8px 28px rgba(15,29,51,.05);
}
.attendance-steps li span { color: var(--coral); font-family: var(--serif); font-size: 18px; padding-top: 2px; }
.attendance-steps h3 { margin: 0 0 6px; font-size: 15px; letter-spacing: .02em; }
.attendance-steps p { margin: 0; color: var(--ink-soft); font-size: 12.5px; }
.attendance-note { margin: 28px 0 0; color: var(--ink-soft); font-size: 12px; line-height: 1.9; }

.attendance-layout { width: min(calc(100% - 48px), 860px); margin-inline: auto; padding: clamp(56px, 7vw, 96px) 0 clamp(72px, 9vw, 120px); }
.quiz { padding: 30px 34px 34px; background: var(--white); border-top: 3px solid var(--ink); box-shadow: 0 8px 28px rgba(15,29,51,.05); }
.quiz .block-label { margin-bottom: 10px; }
.quiz h2 { margin: 0 0 14px; font-family: var(--serif); font-size: clamp(22px, 2.6vw, 30px); font-weight: 500; line-height: 1.3; letter-spacing: -.02em; }
.quiz-lead { margin: 0 0 22px; color: var(--ink-soft); font-size: 13.5px; line-height: 1.9; }
.quiz fieldset { min-width: 0; margin: 0 0 6px; padding: 0; border: 0; }
.quiz label { display: block; margin-bottom: 6px; font-size: 13px; font-weight: 700; }
.quiz input[type="text"] {
  width: 100%; margin-bottom: 16px; padding: 12px 14px; font: inherit; font-size: 15px; color: var(--ink);
  background: var(--paper); border: 1px solid var(--line); border-radius: 2px;
}
.quiz input[type="text"]:focus-visible { outline: none; border-color: var(--ink); }
.question { margin: 8px 0 22px; padding: 18px 20px; background: var(--paper); border: 1px solid var(--line); }
.question > p { margin: 0 0 10px; font-size: 14.5px; font-weight: 700; line-height: 1.8; }
.question .qno { margin-right: 6px; color: var(--coral); font-weight: 800; letter-spacing: .04em; }
.question .choice { display: flex; align-items: flex-start; gap: 10px; padding: 6px 0; margin: 0; cursor: pointer; font-size: 14px; font-weight: 400; line-height: 1.7; }
.question input[type="radio"] { flex: none; margin: 6px 0 0; accent-color: var(--ink); }
.question.wrong { border-color: var(--coral); background: rgba(255, 122, 89, .1); }
.question .explain { display: none; margin-top: 12px; padding: 12px 14px; font-size: 13.5px; line-height: 1.8; background: rgba(255, 200, 87, .22); border-left: 3px solid var(--accent); }
.question.wrong .explain { display: block; }
.question .explain strong { margin-right: 4px; }
.quiz button {
  display: inline-flex; align-items: center; justify-content: center; gap: 24px; width: 100%; min-height: 56px; margin-top: 8px;
  padding: 12px 24px; color: var(--ink); background: var(--accent); border: 0; border-radius: 2px;
  font: inherit; font-size: 14px; font-weight: 700; cursor: pointer; transition: transform 180ms ease, background-color 180ms ease, color 180ms ease;
}
.quiz button:hover, .quiz button:focus-visible { background: var(--ink); color: var(--white); transform: translateY(-2px); }
.quiz button:disabled { color: var(--ink-soft); background: var(--paper-deep); cursor: not-allowed; transform: none; }
.error { display: none; margin-bottom: 18px; padding: 12px 16px; color: #9a3a22; background: rgba(255, 122, 89, .14); border-left: 3px solid var(--coral); font-size: 13.5px; font-weight: 700; }
.attendance-back { margin: 24px 0 0; font-size: 13px; font-weight: 700; }
.attendance-back a { border-bottom: 1px solid var(--line); }
.attendance-back a:hover, .attendance-back a:focus-visible { color: var(--coral); border-bottom-color: var(--coral); }

.result-card { position: relative; padding: 0 36px 32px; background: var(--white); box-shadow: var(--shadow); text-align: center; }
.result-card::before { content: ""; position: absolute; inset: 0 0 auto; height: 4px; background: linear-gradient(90deg, var(--accent) 0 70%, var(--coral) 70%); }
.result-card .block-label { padding-top: 30px; margin-bottom: 8px; }
.result-card h2 { margin: 0 0 22px; font-family: var(--serif); font-size: clamp(22px, 2.6vw, 30px); font-weight: 500; letter-spacing: -.02em; }
.result-table { margin: 0 auto 18px; border-collapse: collapse; text-align: left; font-size: 14px; }
.result-table th, .result-table td { padding: 10px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
.result-table th { color: var(--ink-soft); font-size: 11px; font-weight: 700; letter-spacing: .04em; white-space: nowrap; }
.result-table .code { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; font-size: 22px; font-weight: 700; letter-spacing: .08em; }
.time-note { margin: 0 0 20px; color: var(--ink-soft); font-size: 11.5px; }
.notice { margin: 0; padding: 14px 18px; font-size: 14px; font-weight: 700; line-height: 1.8; background: rgba(255, 200, 87, .2); border: 1px solid var(--line); }

@media (max-width: 980px) {
  .attendance-steps { grid-template-columns: 1fr; }
}
@media (max-width: 680px) {
  .attendance-layout { width: min(calc(100% - 32px), 860px); }
  .quiz { padding: 24px 20px 26px; }
  .result-card { padding-inline: 20px; }
  .result-table th, .result-table td { display: block; padding: 6px 0; border-bottom: 0; }
  .result-table th { padding-top: 10px; }
  .result-table tr { display: block; padding-bottom: 6px; border-bottom: 1px solid var(--line); }
}