/* KIZASHI LMS 受講者側スタイル（自作） */
:root {
  --c-primary: #0f8a8a;
  --c-primary-dark: #0b6b6b;
  --c-primary-deep: #0b4f52;
  --c-primary-soft: #e6f4f4;
  --c-primary-softer: #f3fafa;
  --c-accent: #2ec4b6;
  --c-text: #1f2a2c;
  --c-text-sub: #5b6b6e;
  --c-text-mute: #8a9799;
  --c-line: #e3e9ea;
  --c-line-strong: #cfd9da;
  --c-bg: #ffffff;
  --c-bg-soft: #f6f8f8;
  --c-danger: #d14343;
  --c-danger-soft: #fdecec;
  --c-success: #1f9d63;
  --c-success-soft: #e7f6ee;
  --c-warn: #c98a0b;
  --c-warn-soft: #fff6e0;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 2px rgba(16, 42, 44, 0.06);
  --shadow: 0 2px 10px rgba(16, 42, 44, 0.07);
  --shadow-lg: 0 10px 30px rgba(16, 42, 44, 0.12);
  --font: system-ui, -apple-system, "Segoe UI", "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
  --header-h: 64px;
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-text);
  background: var(--c-bg);
  letter-spacing: 0.02em;
}
a { color: var(--c-primary); text-decoration: none; }
a:hover { color: var(--c-primary-dark); text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }
h1, h2, h3, h4 { line-height: 1.4; margin: 0 0 0.6em; font-weight: 700; }
h1 { font-size: 1.75rem; }
h2 { font-size: 1.35rem; }
h3 { font-size: 1.1rem; }
p { margin: 0 0 1em; }
hr { border: 0; border-top: 1px solid var(--c-line); margin: 24px 0; }
code { background: var(--c-bg-soft); padding: 1px 6px; border-radius: 4px; font-size: 0.9em; }
.muted { color: var(--c-text-sub); }
.small { font-size: 0.85rem; }
.xsmall { font-size: 0.78rem; }
.nowrap { white-space: nowrap; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-0 { margin-top: 0 !important; } .mt-8 { margin-top: 8px; } .mt-16 { margin-top: 16px; } .mt-24 { margin-top: 24px; } .mt-32 { margin-top: 32px; }
.mb-0 { margin-bottom: 0 !important; } .mb-8 { margin-bottom: 8px; } .mb-16 { margin-bottom: 16px; } .mb-24 { margin-bottom: 24px; }
.flex { display: flex; gap: 12px; align-items: center; }
.flex-wrap { flex-wrap: wrap; }
.between { justify-content: space-between; }
.grow { flex: 1; }
.hidden { display: none !important; }

/* ---------- レイアウト ---------- */
.container { width: 100%; max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: 760px; }
.page { padding: 32px 0 64px; min-height: calc(100vh - var(--header-h) - 220px); }
.page-title { font-size: 1.6rem; margin: 0 0 24px; display: flex; align-items: center; gap: 12px; }
.page-title .sub { font-size: 0.9rem; font-weight: 400; color: var(--c-text-sub); }
.section-title {
  font-size: 1.2rem; margin: 40px 0 16px; display: flex; align-items: center; gap: 12px;
}
.section-title > span:first-child { display: flex; align-items: center; margin-right: auto; }
.section-title > span:first-child::before { content: ""; width: 4px; height: 1.1em; background: var(--c-primary); border-radius: 2px; margin-right: 10px; display: inline-block; }
.section-title a { font-size: 0.88rem; font-weight: 500; }

/* ---------- ヘッダー ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50; height: var(--header-h);
  background: rgba(255, 255, 255, 0.96); backdrop-filter: saturate(1.4) blur(6px);
  border-bottom: 1px solid var(--c-line);
}
.site-header .container { height: 100%; display: flex; align-items: center; gap: 20px; }
.site-logo img { height: 30px; width: auto; }
.header-search { flex: 1; max-width: 420px; position: relative; }
.header-search input[type=search] {
  width: 100%; height: 40px; border: 1px solid var(--c-line); background: var(--c-bg-soft);
  border-radius: 999px; padding: 0 16px 0 40px; font: inherit; font-size: 0.9rem; color: var(--c-text);
}
.header-search input[type=search]:focus { outline: none; border-color: var(--c-primary); background: #fff; box-shadow: 0 0 0 3px var(--c-primary-soft); }
.header-search svg { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); color: var(--c-text-mute); }
.header-nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.header-nav > a, .header-nav .dd-toggle {
  display: inline-flex; align-items: center; gap: 6px; height: 40px; padding: 0 12px; border-radius: var(--radius);
  color: var(--c-text); font-size: 0.9rem; font-weight: 500; background: none; border: 0; cursor: pointer; font-family: inherit;
}
.header-nav > a:hover, .header-nav .dd-toggle:hover { background: var(--c-primary-softer); color: var(--c-primary-dark); text-decoration: none; }
.header-nav > a.active { color: var(--c-primary); }
.header-nav > a.btn { height: 38px; }
.header-nav > a.btn-primary { background: var(--c-primary); color: #fff; margin-left: 4px; }
.header-nav > a.btn-primary:hover { background: var(--c-primary-dark); color: #fff; }
.avatar { width: 32px; height: 32px; border-radius: 50%; object-fit: cover; background: var(--c-primary-soft); flex: none; }
.avatar-lg { width: 96px; height: 96px; }
.menu-toggle { display: none; }

/* ドロップダウン */
.dropdown { position: relative; }
.dropdown-menu {
  position: absolute; right: 0; top: calc(100% + 6px); min-width: 220px; background: #fff; border: 1px solid var(--c-line);
  border-radius: var(--radius); box-shadow: var(--shadow-lg); padding: 6px; display: none; z-index: 60;
}
.dropdown.open .dropdown-menu { display: block; }
.dropdown-menu a, .dropdown-menu button {
  display: flex; align-items: center; gap: 10px; width: 100%; padding: 9px 12px; color: var(--c-text); border-radius: 6px;
  font-size: 0.9rem; background: none; border: 0; text-align: left; cursor: pointer; font-family: inherit;
}
.dropdown-menu a:hover, .dropdown-menu button:hover { background: var(--c-primary-softer); text-decoration: none; color: var(--c-primary-dark); }
.dropdown-menu .dd-head { padding: 10px 12px 8px; border-bottom: 1px solid var(--c-line); margin-bottom: 6px; }
.dropdown-menu .dd-head strong { display: block; font-size: 0.92rem; }
.dropdown-menu .dd-head span { font-size: 0.78rem; color: var(--c-text-sub); word-break: break-all; }
.dropdown-menu hr { margin: 6px 0; }

/* ---------- フッター ---------- */
.site-footer { background: var(--c-primary-deep); color: #d5eaea; padding: 48px 0 28px; margin-top: 40px; }
.site-footer a { color: #e9f6f6; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 32px; }
.footer-brand img { height: 28px; filter: brightness(0) invert(1); opacity: 0.95; }
.footer-brand p { font-size: 0.85rem; margin-top: 12px; color: #b7d6d6; }
.footer-col h4 { font-size: 0.85rem; letter-spacing: 0.1em; color: #fff; margin-bottom: 12px; }
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col li { margin: 6px 0; font-size: 0.88rem; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.12); margin-top: 32px; padding-top: 18px; font-size: 0.8rem; color: #a8cccc; text-align: center; }
.back-to-top {
  position: fixed; right: 20px; bottom: 20px; width: 44px; height: 44px; border-radius: 50%; background: var(--c-primary); color: #fff;
  display: flex; align-items: center; justify-content: center; box-shadow: var(--shadow-lg); opacity: 0; pointer-events: none; transition: opacity .2s; z-index: 40;
}
.back-to-top.show { opacity: 1; pointer-events: auto; }
.back-to-top:hover { background: var(--c-primary-dark); color: #fff; text-decoration: none; }

/* ---------- ボタン ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 42px; padding: 0 20px;
  border-radius: var(--radius); border: 1px solid transparent; font: inherit; font-size: 0.92rem; font-weight: 600;
  cursor: pointer; transition: background .15s, border-color .15s, color .15s, box-shadow .15s; white-space: nowrap; text-decoration: none;
  background: #fff; color: var(--c-text); border-color: var(--c-line-strong);
}
.btn:hover { text-decoration: none; background: var(--c-bg-soft); }
.btn:disabled, .btn.disabled { opacity: .55; cursor: not-allowed; }
.btn-primary { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }
.btn-primary:hover { background: var(--c-primary-dark); border-color: var(--c-primary-dark); color: #fff; }
.btn-outline { background: #fff; color: var(--c-primary); border-color: var(--c-primary); }
.btn-outline:hover { background: var(--c-primary-softer); color: var(--c-primary-dark); }
.btn-ghost { background: transparent; border-color: transparent; color: var(--c-primary); }
.btn-ghost:hover { background: var(--c-primary-softer); }
.btn-danger { background: var(--c-danger); color: #fff; border-color: var(--c-danger); }
.btn-danger:hover { background: #b33636; color: #fff; }
.btn-lg { height: 52px; padding: 0 28px; font-size: 1rem; }
.btn-sm { height: 32px; padding: 0 12px; font-size: 0.82rem; }
.btn-block { width: 100%; }

/* ---------- フォーム ---------- */
.form-group { margin-bottom: 18px; }
.form-label { display: block; font-weight: 600; font-size: 0.88rem; margin-bottom: 6px; }
.form-label .req { color: var(--c-danger); font-size: 0.75rem; margin-left: 6px; font-weight: 500; }
.form-help { font-size: 0.8rem; color: var(--c-text-sub); margin-top: 4px; }
.input, .select, .textarea, input[type=text], input[type=email], input[type=password], input[type=number], input[type=date], input[type=datetime-local], input[type=url], input[type=search], select, textarea {
  width: 100%; height: 44px; border: 1px solid var(--c-line-strong); border-radius: var(--radius); padding: 0 12px; font: inherit; font-size: 0.95rem;
  background: #fff; color: var(--c-text); transition: border-color .15s, box-shadow .15s;
}
textarea, .textarea { height: auto; min-height: 110px; padding: 10px 12px; line-height: 1.6; resize: vertical; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--c-primary); box-shadow: 0 0 0 3px var(--c-primary-soft); }
input[type=file] { font: inherit; font-size: 0.88rem; }
.check { display: inline-flex; align-items: center; gap: 8px; cursor: pointer; font-size: 0.92rem; margin-right: 16px; }
.check input { width: 18px; height: 18px; accent-color: var(--c-primary); margin: 0; }
.form-actions { display: flex; gap: 12px; align-items: center; margin-top: 24px; }

/* ---------- カード ---------- */
.card { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); }
.card-body { padding: 24px; }
.card-title { font-size: 1.05rem; margin: 0 0 12px; }

/* 認証画面 */
.auth-wrap { min-height: calc(100vh - var(--header-h)); display: flex; align-items: center; justify-content: center; padding: 48px 16px; background: linear-gradient(160deg, var(--c-primary-softer), #fff 60%); }
.auth-card { width: 100%; max-width: 440px; }
.auth-card .card-body { padding: 36px 32px; }
.auth-card h1 { font-size: 1.4rem; text-align: center; margin-bottom: 8px; }
.auth-card .lead { text-align: center; color: var(--c-text-sub); font-size: 0.88rem; margin-bottom: 24px; }
.auth-links { margin-top: 20px; text-align: center; font-size: 0.88rem; display: grid; gap: 6px; }
.demo-accounts { margin-top: 20px; background: var(--c-bg-soft); border-radius: var(--radius); padding: 12px 14px; font-size: 0.8rem; color: var(--c-text-sub); }

/* ---------- フラッシュ ---------- */
.flash-area { position: fixed; top: calc(var(--header-h) + 12px); left: 50%; transform: translateX(-50%); z-index: 70; width: min(560px, calc(100% - 32px)); display: grid; gap: 8px; }
.flash { padding: 12px 40px 12px 16px; border-radius: var(--radius); font-size: 0.9rem; box-shadow: var(--shadow); position: relative; border: 1px solid transparent; animation: flash-in .25s ease; }
.flash-success { background: var(--c-success-soft); color: #136b43; border-color: #bfe6d1; }
.flash-error { background: var(--c-danger-soft); color: #9d2b2b; border-color: #f3c7c7; }
.flash-info { background: var(--c-primary-soft); color: var(--c-primary-deep); border-color: #c4e3e3; }
.flash-close { position: absolute; right: 8px; top: 50%; transform: translateY(-50%); background: none; border: 0; font-size: 18px; cursor: pointer; color: inherit; opacity: .6; }
@keyframes flash-in { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: none; } }

/* ---------- バッジ ---------- */
.badge { display: inline-flex; align-items: center; height: 22px; padding: 0 8px; border-radius: 4px; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.04em; background: var(--c-primary-soft); color: var(--c-primary-dark); white-space: nowrap; }
.badge-gray { background: #eef1f1; color: var(--c-text-sub); }
.badge-success { background: var(--c-success-soft); color: var(--c-success); }
.badge-danger { background: var(--c-danger-soft); color: var(--c-danger); }
.badge-warn { background: var(--c-warn-soft); color: var(--c-warn); }
.badge-solid { background: var(--c-primary); color: #fff; }

/* ---------- コースカード ---------- */
.course-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 24px; }
.course-card { display: flex; flex-direction: column; background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); overflow: hidden; color: var(--c-text); transition: transform .15s, box-shadow .15s, border-color .15s; }
.course-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: transparent; text-decoration: none; color: var(--c-text); }
.course-thumb { position: relative; aspect-ratio: 16 / 9; background: var(--c-primary-soft); overflow: hidden; }
.course-thumb img { width: 100%; height: 100%; object-fit: cover; }
.course-thumb .badge { position: absolute; right: 10px; bottom: 10px; box-shadow: 0 1px 4px rgba(0,0,0,.15); }
.course-thumb .labels { position: absolute; right: 10px; top: 10px; display: flex; gap: 4px; }
.course-card-body { padding: 14px 16px 16px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.course-card-title { font-size: 0.98rem; font-weight: 700; line-height: 1.5; margin: 0; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.course-card-meta { font-size: 0.78rem; color: var(--c-text-sub); display: flex; gap: 12px; flex-wrap: wrap; }
.course-card-meta span { display: inline-flex; align-items: center; gap: 4px; }
.course-card-foot { margin-top: auto; padding-top: 6px; }
.stars { color: #e9a93a; letter-spacing: 1px; font-size: 0.85rem; }
.stars .off { color: #d9dfe0; }

/* 進捗バー */
.progress { height: 6px; background: #e8eeee; border-radius: 999px; overflow: hidden; }
.progress > span { display: block; height: 100%; background: linear-gradient(90deg, var(--c-primary), var(--c-accent)); border-radius: 999px; transition: width .4s; }
.progress-row { display: flex; align-items: center; gap: 10px; font-size: 0.78rem; color: var(--c-text-sub); }
.progress-row .progress { flex: 1; }
.progress-lg { height: 10px; }

/* 空状態 */
.empty { text-align: center; padding: 56px 24px; border: 1px dashed var(--c-line-strong); border-radius: var(--radius-lg); background: var(--c-bg-soft); color: var(--c-text-sub); }
.empty svg { color: var(--c-primary); opacity: .5; margin-bottom: 12px; }
.empty p { margin-bottom: 16px; }

/* ---------- トップ ---------- */
.top-banner { display: block; border-radius: var(--radius-lg); overflow: hidden; margin-top: 24px; box-shadow: var(--shadow); }
.top-banner img { width: 100%; }
.top-banner-small { display: block; border-radius: var(--radius); overflow: hidden; margin-top: 24px; max-width: 720px; }
.hero {
  margin-top: 24px; border-radius: var(--radius-lg); padding: 48px; color: #fff; position: relative; overflow: hidden;
  background: linear-gradient(120deg, var(--c-primary-deep), var(--c-primary));
}
.free-html { margin-top: 24px; }
.about-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; }
.about-grid > div { background: var(--c-primary-softer); border: 1px solid var(--c-primary-soft); border-radius: var(--radius); padding: 20px; }
.about-grid h3 { color: var(--c-primary-dark); font-size: 1rem; margin-bottom: 6px; }
.about-grid p { margin: 0; font-size: 0.88rem; color: var(--c-text-sub); }

/* お知らせ */
.news-list { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--c-line); }
.news-list li { border-bottom: 1px solid var(--c-line); }
.news-list a { display: flex; gap: 16px; align-items: center; padding: 14px 4px; color: var(--c-text); }
.news-list a:hover { background: var(--c-primary-softer); text-decoration: none; }
.news-list time { font-size: 0.82rem; color: var(--c-text-sub); flex: none; width: 92px; font-variant-numeric: tabular-nums; }
.news-list .badge { flex: none; }
.news-list .t { flex: 1; font-weight: 500; }
.article { max-width: 760px; }
.article-body { font-size: 1rem; line-height: 1.95; }
.article-body img { border-radius: var(--radius); margin: 16px 0; }
.article-meta { font-size: 0.85rem; color: var(--c-text-sub); display: flex; gap: 12px; align-items: center; margin-bottom: 24px; }

/* フィルタバー */
.filter-bar { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; align-items: center; }
.chip { display: inline-flex; align-items: center; height: 34px; padding: 0 14px; border-radius: 999px; border: 1px solid var(--c-line-strong); background: #fff; color: var(--c-text); font-size: 0.85rem; }
.chip:hover { border-color: var(--c-primary); color: var(--c-primary); text-decoration: none; }
.chip.active { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }
.search-inline { display: flex; gap: 8px; max-width: 520px; }
.search-inline input { flex: 1; }

/* ---------- コース詳細 ---------- */
.course-hero { background: linear-gradient(120deg, var(--c-primary-deep), #0d7373); color: #fff; padding: 40px 0; }
.course-hero .container { display: grid; grid-template-columns: 1fr 360px; gap: 40px; align-items: start; }
.course-hero h1 { font-size: 1.9rem; margin-bottom: 12px; }
.course-hero .summary { color: #d7eeee; font-size: 1rem; }
.course-hero .meta { display: flex; flex-wrap: wrap; gap: 16px; font-size: 0.86rem; color: #cfe8e8; margin-top: 16px; }
.course-hero .meta span { display: inline-flex; align-items: center; gap: 6px; }
.course-hero .breadcrumb a { color: #bfe3e3; }
.breadcrumb { font-size: 0.82rem; margin-bottom: 14px; display: flex; gap: 6px; flex-wrap: wrap; }
.breadcrumb span.sep { opacity: .6; }
.enroll-box { background: #fff; color: var(--c-text); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); }
.enroll-box .course-thumb { border-radius: 0; }
.enroll-box .inner { padding: 20px; }
.enroll-box .price { font-size: 1.5rem; font-weight: 800; margin-bottom: 12px; }
.enroll-box ul { list-style: none; padding: 0; margin: 16px 0 0; font-size: 0.85rem; color: var(--c-text-sub); }
.enroll-box li { display: flex; gap: 8px; padding: 4px 0; }
.course-main { display: grid; grid-template-columns: minmax(0, 1fr) 360px; gap: 40px; padding: 32px 0 64px; }
.course-main > .main-col { min-width: 0; }
.box { border: 1px solid var(--c-line); border-radius: var(--radius-lg); padding: 24px; margin-bottom: 24px; }
.box h2 { font-size: 1.15rem; margin-bottom: 14px; }
.box-learn ul { padding-left: 1.2em; margin: 0; }
.box-learn li { margin: 4px 0; }
.richtext h2 { font-size: 1.2rem; margin-top: 1.4em; }
.richtext h3 { font-size: 1.05rem; margin-top: 1.2em; }
.richtext blockquote { margin: 1em 0; padding: 12px 16px; border-left: 4px solid var(--c-primary); background: var(--c-primary-softer); border-radius: 0 var(--radius) var(--radius) 0; color: var(--c-text-sub); }
.richtext ul, .richtext ol { padding-left: 1.4em; }
.richtext table { border-collapse: collapse; width: 100%; }
.richtext th, .richtext td { border: 1px solid var(--c-line); padding: 8px 10px; }

.curriculum { border: 1px solid var(--c-line); border-radius: var(--radius-lg); overflow: hidden; }
.curriculum details { border-bottom: 1px solid var(--c-line); }
.curriculum details:last-child { border-bottom: 0; }
.curriculum summary { list-style: none; cursor: pointer; padding: 14px 18px; background: var(--c-bg-soft); font-weight: 700; display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.curriculum summary::-webkit-details-marker { display: none; }
.curriculum summary::after { content: ""; width: 8px; height: 8px; border-right: 2px solid var(--c-text-sub); border-bottom: 2px solid var(--c-text-sub); transform: rotate(45deg); transition: transform .2s; margin-left: 8px; }
.curriculum details[open] summary::after { transform: rotate(-135deg); }
.curriculum summary .cnt { margin-left: auto; font-size: 0.8rem; font-weight: 400; color: var(--c-text-sub); }
.curriculum ul { list-style: none; margin: 0; padding: 0; }
.curriculum li a, .curriculum li > div { display: flex; align-items: center; gap: 12px; padding: 11px 18px; border-top: 1px solid var(--c-line); color: var(--c-text); font-size: 0.92rem; }
.curriculum li a:hover { background: var(--c-primary-softer); text-decoration: none; }
.curriculum .ltype { color: var(--c-primary); flex: none; display: inline-flex; }
.curriculum .lmin { margin-left: auto; font-size: 0.8rem; color: var(--c-text-sub); white-space: nowrap; }
.curriculum .done { color: var(--c-success); }

.instructor { display: flex; gap: 16px; align-items: flex-start; }
.instructor .avatar { width: 64px; height: 64px; }
.instructor h3 { margin: 0 0 2px; font-size: 1rem; }

.review { border-top: 1px solid var(--c-line); padding: 16px 0; }
.review:first-of-type { border-top: 0; }
.review-head { display: flex; gap: 10px; align-items: center; margin-bottom: 4px; font-size: 0.88rem; }
.review-summary { display: flex; align-items: center; gap: 16px; margin-bottom: 12px; }
.review-summary .big { font-size: 2.4rem; font-weight: 800; line-height: 1; }
.star-input { display: inline-flex; flex-direction: row-reverse; gap: 2px; }
.star-input input { display: none; }
.star-input label { font-size: 28px; color: #d9dfe0; cursor: pointer; line-height: 1; }
.star-input input:checked ~ label, .star-input label:hover, .star-input label:hover ~ label { color: #e9a93a; }

/* ---------- レクチャー視聴 ---------- */
.lecture-layout { display: grid; grid-template-columns: 320px 1fr; min-height: calc(100vh - var(--header-h)); }
.lecture-side { border-right: 1px solid var(--c-line); background: #fbfcfc; position: sticky; top: var(--header-h); height: calc(100vh - var(--header-h)); overflow-y: auto; }
.lecture-side-head { padding: 18px 18px 14px; border-bottom: 1px solid var(--c-line); background: #fff; position: sticky; top: 0; z-index: 1; }
.lecture-side-head a.back { font-size: 0.8rem; color: var(--c-text-sub); display: inline-flex; gap: 4px; align-items: center; }
.lecture-side-head h2 { font-size: 0.98rem; margin: 6px 0 10px; }
.lecture-side .sec-title { padding: 12px 18px 6px; font-size: 0.78rem; font-weight: 700; color: var(--c-text-sub); letter-spacing: 0.05em; }
.lecture-side ul { list-style: none; padding: 0; margin: 0 0 8px; }
.lecture-side li a { display: flex; gap: 10px; align-items: flex-start; padding: 9px 18px; color: var(--c-text); font-size: 0.88rem; line-height: 1.5; border-left: 3px solid transparent; }
.lecture-side li a:hover { background: var(--c-primary-softer); text-decoration: none; }
.lecture-side li a.current { background: var(--c-primary-soft); border-left-color: var(--c-primary); font-weight: 700; }
.lecture-side .chk { flex: none; width: 20px; height: 20px; border-radius: 50%; border: 2px solid var(--c-line-strong); display: inline-flex; align-items: center; justify-content: center; margin-top: 1px; background: #fff; }
.lecture-side .chk.on { background: var(--c-success); border-color: var(--c-success); color: #fff; }
.lecture-side .meta { display: block; font-size: 0.74rem; color: var(--c-text-mute); font-weight: 400; }
.lecture-main { padding: 28px 40px 64px; max-width: 980px; width: 100%; }
.lecture-main .ltype-badge { margin-bottom: 8px; }
.lecture-main h1 { font-size: 1.5rem; margin-bottom: 20px; }
.media-frame { position: relative; aspect-ratio: 16 / 9; background: #000; border-radius: var(--radius); overflow: hidden; margin-bottom: 24px; }
.media-frame iframe, .media-frame video { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.pdf-frame { width: 100%; height: 75vh; border: 1px solid var(--c-line); border-radius: var(--radius); margin-bottom: 16px; background: var(--c-bg-soft); }
.audio-box { background: var(--c-primary-softer); border: 1px solid var(--c-primary-soft); border-radius: var(--radius); padding: 24px; margin-bottom: 24px; display: flex; gap: 20px; align-items: center; }
.audio-box audio { flex: 1; }
.download-box { display: flex; gap: 16px; align-items: center; border: 1px solid var(--c-line); border-radius: var(--radius); padding: 18px 20px; margin-bottom: 24px; }
.download-box .ico { width: 48px; height: 48px; border-radius: var(--radius); background: var(--c-primary-soft); color: var(--c-primary); display: flex; align-items: center; justify-content: center; flex: none; }
.lecture-nav { display: flex; justify-content: space-between; gap: 12px; margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--c-line); flex-wrap: wrap; }
.lecture-nav .complete-form { margin-left: auto; }
.completed-mark { display: inline-flex; align-items: center; gap: 6px; color: var(--c-success); font-weight: 700; font-size: 0.9rem; }

/* 設問 */
.qbox { border: 1px solid var(--c-line); border-radius: var(--radius); padding: 20px; margin-bottom: 16px; background: #fff; }
.qbox .qnum { font-size: 0.78rem; font-weight: 700; color: var(--c-primary); letter-spacing: 0.06em; margin-bottom: 4px; }
.qbox .qtext { font-weight: 700; margin-bottom: 12px; }
.qbox .choice { display: flex; gap: 10px; align-items: center; padding: 10px 12px; border: 1px solid var(--c-line); border-radius: var(--radius); margin-bottom: 8px; cursor: pointer; transition: background .1s, border-color .1s; }
.qbox .choice:hover { border-color: var(--c-primary); background: var(--c-primary-softer); }
.qbox .choice input { accent-color: var(--c-primary); width: 18px; height: 18px; margin: 0; }
.qbox .choice.correct { border-color: var(--c-success); background: var(--c-success-soft); }
.qbox .choice.wrong { border-color: var(--c-danger); background: var(--c-danger-soft); }
.qbox .feedback { margin-top: 10px; padding: 10px 14px; border-radius: var(--radius); font-size: 0.88rem; display: none; }
.qbox .feedback.show { display: block; }
.qbox .feedback.ok { background: var(--c-success-soft); color: #136b43; }
.qbox .feedback.ng { background: var(--c-danger-soft); color: #9d2b2b; }
.qbox .qscore { float: right; font-size: 0.78rem; color: var(--c-text-sub); font-weight: 400; }
.exam-info { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin-bottom: 20px; }
.exam-info > div { background: var(--c-bg-soft); border-radius: var(--radius); padding: 14px 16px; }
.exam-info .k { font-size: 0.76rem; color: var(--c-text-sub); }
.exam-info .v { font-size: 1.15rem; font-weight: 700; }
.timer { position: sticky; top: calc(var(--header-h) + 8px); z-index: 5; display: inline-flex; align-items: center; gap: 8px; background: var(--c-primary-deep); color: #fff; padding: 8px 16px; border-radius: 999px; font-weight: 700; font-variant-numeric: tabular-nums; margin-bottom: 16px; box-shadow: var(--shadow); }
.timer.warn { background: var(--c-danger); }
.result-card { text-align: center; padding: 32px; border-radius: var(--radius-lg); margin-bottom: 24px; }
.result-card.pass { background: var(--c-success-soft); border: 1px solid #bfe6d1; }
.result-card.fail { background: var(--c-danger-soft); border: 1px solid #f3c7c7; }
.result-card .score { font-size: 3rem; font-weight: 800; line-height: 1.1; }
.result-card .verdict { font-size: 1.2rem; font-weight: 700; margin: 6px 0 4px; }

/* コメント */
.comments { margin-top: 48px; }
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--c-line); margin-bottom: 20px; }
.tabs a, .tabs button { padding: 10px 16px; font-size: 0.92rem; font-weight: 600; color: var(--c-text-sub); border: 0; background: none; border-bottom: 2px solid transparent; margin-bottom: -1px; cursor: pointer; font-family: inherit; }
.tabs a.active, .tabs button.active { color: var(--c-primary); border-bottom-color: var(--c-primary); }
.tabs a:hover { text-decoration: none; color: var(--c-primary); }
.comment { display: flex; gap: 12px; padding: 16px 0; border-bottom: 1px solid var(--c-line); }
.comment .body { flex: 1; min-width: 0; }
.comment .head { font-size: 0.85rem; display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.comment .head strong { font-size: 0.9rem; }
.comment .text { white-space: pre-wrap; margin: 4px 0 0; font-size: 0.93rem; }
.comment .replies { margin-top: 10px; padding-left: 16px; border-left: 3px solid var(--c-primary-soft); }
.comment .replies .comment { border-bottom: 0; padding: 8px 0; }

/* ---------- マイページ系 ---------- */
.mycourse-list { display: grid; gap: 16px; }
.mycourse-item { display: grid; grid-template-columns: 220px 1fr 150px; gap: 20px; align-items: center; border: 1px solid var(--c-line); border-radius: var(--radius); padding: 14px; background: #fff; transition: box-shadow .15s; }
.mycourse-item:hover { box-shadow: var(--shadow); }
.mycourse-item .course-thumb { border-radius: 6px; }
.mycourse-item > div:last-child { text-align: right; }
.mycourse-item h3 { font-size: 1.02rem; margin-bottom: 6px; }
.mycourse-item .meta { font-size: 0.8rem; color: var(--c-text-sub); display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 10px; }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 32px; }
.stat { border: 1px solid var(--c-line); border-radius: var(--radius); padding: 18px 20px; background: linear-gradient(180deg, #fff, var(--c-primary-softer)); }
.stat .k { font-size: 0.8rem; color: var(--c-text-sub); }
.stat .v { font-size: 2rem; font-weight: 800; color: var(--c-primary-dark); line-height: 1.2; }
.stat .v small { font-size: 0.9rem; font-weight: 500; margin-left: 2px; color: var(--c-text-sub); }
.profile-head { display: flex; gap: 24px; align-items: center; margin-bottom: 32px; }
.profile-head h1 { margin: 0 0 4px; font-size: 1.5rem; }

.settings-layout { display: grid; grid-template-columns: 220px 1fr; gap: 32px; }
.settings-nav { position: sticky; top: calc(var(--header-h) + 24px); align-self: start; display: grid; gap: 2px; }
.settings-nav a { padding: 9px 14px; border-radius: var(--radius); color: var(--c-text); font-size: 0.9rem; }
.settings-nav a:hover { background: var(--c-primary-softer); text-decoration: none; }
.settings-section { margin-bottom: 28px; }
.settings-section h2 { font-size: 1.1rem; margin-bottom: 16px; padding-bottom: 10px; border-bottom: 1px solid var(--c-line); }

.table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.table th, .table td { padding: 12px 14px; border-bottom: 1px solid var(--c-line); text-align: left; vertical-align: middle; }
.table th { font-size: 0.8rem; color: var(--c-text-sub); font-weight: 600; background: var(--c-bg-soft); }
.table-wrap { border: 1px solid var(--c-line); border-radius: var(--radius); overflow-x: auto; }
.table-wrap .table tr:last-child td { border-bottom: 0; }

.cert-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px; }
.cert-card { border: 1px solid var(--c-line); border-radius: var(--radius); overflow: hidden; background: #fff; }
.cert-card .cert-visual { aspect-ratio: 1.414 / 1; background: linear-gradient(135deg, var(--c-primary-softer), #fff); display: flex; flex-direction: column; align-items: center; justify-content: center; border-bottom: 1px solid var(--c-line); position: relative; }
.cert-card .cert-visual::before { content: ""; position: absolute; inset: 10px; border: 2px solid var(--c-primary); border-radius: 4px; opacity: .5; }
.cert-card .cert-visual .t { font-size: 1.3rem; font-weight: 800; color: var(--c-primary-dark); letter-spacing: 0.3em; }
.cert-card .cert-visual .n { font-size: 0.9rem; margin-top: 6px; }
.cert-card .inner { padding: 14px 16px; }
.cert-card h3 { font-size: 0.95rem; margin-bottom: 4px; }

/* 配布ページ・ブロック・エラー */
.center-card { max-width: 640px; margin: 48px auto; }
.status-page { text-align: center; padding: 80px 16px; }
.status-page .code { font-size: 4rem; font-weight: 800; color: var(--c-primary); line-height: 1; letter-spacing: 0.05em; }
.status-page h1 { margin-top: 16px; }

.pagination { display: flex; gap: 4px; justify-content: center; margin-top: 28px; flex-wrap: wrap; }
.pagination a, .pagination span { min-width: 36px; height: 36px; padding: 0 10px; display: inline-flex; align-items: center; justify-content: center; border: 1px solid var(--c-line); border-radius: 6px; font-size: 0.86rem; color: var(--c-text); background: #fff; }
.pagination a:hover { border-color: var(--c-primary); color: var(--c-primary); text-decoration: none; }
.pagination .current { background: var(--c-primary); border-color: var(--c-primary); color: #fff; font-weight: 700; }
.pagination .disabled { color: var(--c-text-mute); background: var(--c-bg-soft); }
.pagination .gap { border: 0; background: none; }

/* ---------- レスポンシブ ---------- */
@media (max-width: 960px) {
  .course-hero .container, .course-main { grid-template-columns: 1fr; }
  .lecture-layout { grid-template-columns: 1fr; }
  .lecture-side { position: static; height: auto; max-height: 50vh; border-right: 0; border-bottom: 1px solid var(--c-line); }
  .lecture-main { padding: 20px; }
  .settings-layout { grid-template-columns: 1fr; }
  .settings-nav { position: static; display: flex; flex-wrap: wrap; }
}
@media (max-width: 720px) {
  .container { padding: 0 16px; }
  .header-search { display: none; }
  .header-nav .hide-sm { display: none; }
  .mycourse-item { grid-template-columns: 1fr; }
  .hero { padding: 28px; }
  .page-title { font-size: 1.35rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .news-list a { flex-wrap: wrap; gap: 6px 12px; }
  .news-list .t { flex-basis: 100%; }
}