/* 講座サイト 共通デザイン
   色・文字はここでまとめて変えられます */
:root {
  --bg: #ffffff;
  --ivory: #faf8f4;
  --ink: #1e2b3c;        /* 見出し：深いネイビー */
  --text: #3b4452;       /* 本文：チャコール */
  --muted: #8a8f98;
  --line: #e8e3da;
  --accent: #a8836a;     /* くすみブラウンピンク */
  --accent-soft: #f4ede6;
  --ok: #5b8c7a;         /* 落ち着いたグリーン */
  --ok-soft: #eaf2ee;
  --serif: "Shippori Mincho", "Yu Mincho", "Hiragino Mincho ProN", serif;
  --sans: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", sans-serif;
  --max: 1120px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-weight: 400;
  font-size: 15px;
  line-height: 2;
  letter-spacing: 0.05em;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
h1, h2, h3 { font-family: var(--serif); color: var(--ink); font-weight: 600; line-height: 1.6; letter-spacing: 0.08em; margin: 0; }
button { font-family: inherit; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 32px; }

/* 英字の小見出し */
.label { font-family: var(--serif); font-size: 12px; letter-spacing: 0.28em; color: var(--accent); text-transform: uppercase; }

/* ヘッダー */
.site-header { background: rgba(255, 255, 255, 0.94); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 20; }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { text-decoration: none; display: flex; flex-direction: column; line-height: 1.4; }
.brand b { font-family: var(--serif); font-weight: 600; color: var(--ink); font-size: 16px; letter-spacing: 0.12em; }
.brand span { font-size: 10px; letter-spacing: 0.24em; color: var(--muted); }
.nav { display: flex; align-items: center; gap: 28px; font-size: 13px; }
.nav a { text-decoration: none; color: var(--text); }
.nav a:hover { color: var(--accent); }
.nav .total { display: flex; align-items: center; gap: 10px; color: var(--muted); font-size: 12px; }
.ring { width: 30px; height: 30px; }

/* ===== ホーム ===== */
.hero { background: var(--ivory); border-bottom: 1px solid var(--line); }
.hero .wrap { display: grid; grid-template-columns: 1.1fr 1fr; gap: 64px; align-items: center; padding-top: 88px; padding-bottom: 88px; }
.hero h1 { font-size: clamp(28px, 4vw, 42px); margin: 18px 0 14px; letter-spacing: 0.12em; }
.hero .sub { font-family: var(--serif); color: var(--ink); font-size: 16px; margin: 0 0 28px; letter-spacing: 0.14em; }
.hero p { margin: 0; }
.teacher { margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--line); font-size: 13px; color: var(--muted); }
.teacher b { font-family: var(--serif); color: var(--ink); font-size: 16px; font-weight: 600; margin-right: 10px; letter-spacing: 0.14em; }

/* 続きから */
.resume { background: #fff; border: 1px solid var(--line); text-decoration: none; display: block; transition: box-shadow .3s; }
.resume:hover { box-shadow: 0 18px 40px rgba(30, 43, 60, .08); }
.thumb { position: relative; aspect-ratio: 16 / 9; background: linear-gradient(135deg, #24344a 0%, #1e2b3c 55%, #3a3a46 100%); color: #fff; display: flex; align-items: flex-end; padding: 22px 24px; overflow: hidden; }
.thumb::after { content: ""; position: absolute; right: -40px; top: -40px; width: 220px; height: 220px; border-radius: 50%; border: 1px solid rgba(255, 255, 255, .12); }
.thumb .big { position: absolute; right: 26px; top: 6px; font-family: var(--serif); font-size: 96px; line-height: 1; color: rgba(255, 255, 255, .1); letter-spacing: 0; }
.thumb .t { position: relative; z-index: 1; }
.thumb .t small { display: block; font-size: 11px; letter-spacing: 0.26em; opacity: .7; }
.thumb .t span { font-family: var(--serif); font-size: 19px; letter-spacing: 0.1em; }
.play-badge { position: absolute; left: 50%; top: 44%; transform: translate(-50%, -50%); width: 60px; height: 60px; border-radius: 50%; border: 1px solid rgba(255, 255, 255, .6); display: grid; place-items: center; z-index: 1; }
.play-badge::after { content: ""; border-left: 14px solid #fff; border-top: 9px solid transparent; border-bottom: 9px solid transparent; margin-left: 4px; }
.resume .meta { padding: 18px 24px 20px; display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.resume .meta div { font-size: 13px; color: var(--muted); line-height: 1.7; }
.resume .meta b { display: block; color: var(--ink); font-weight: 500; font-size: 14px; }
.resume .go { font-size: 12px; letter-spacing: 0.16em; color: var(--accent); white-space: nowrap; }

/* 全体の進み具合 */
.overall { display: flex; align-items: center; gap: 20px; font-size: 13px; color: var(--muted); margin-top: 20px; }
.overall .bar { flex: 1; }
.bar { height: 3px; background: var(--line); position: relative; overflow: hidden; }
.bar span { position: absolute; left: 0; top: 0; bottom: 0; width: 0; background: var(--accent); transition: width .6s ease; }

section { padding: 96px 0; }
.sec-head { text-align: center; margin-bottom: 56px; }
.sec-head h2 { font-size: clamp(22px, 3vw, 28px); margin-top: 10px; }
.sec-head p { margin: 14px auto 0; max-width: 560px; color: var(--muted); font-size: 14px; }

/* カリキュラム */
.curriculum { border-top: 1px solid var(--line); }
.lesson-row { display: grid; grid-template-columns: 96px 1fr 200px auto; gap: 28px; align-items: center; padding: 30px 8px; border-bottom: 1px solid var(--line); text-decoration: none; transition: background .25s; }
.lesson-row:hover { background: var(--ivory); }
.lesson-row .num { font-family: var(--serif); font-size: 44px; color: var(--accent); line-height: 1; letter-spacing: 0; text-align: center; }
.lesson-row .en { font-size: 11px; letter-spacing: 0.24em; color: var(--muted); text-transform: uppercase; }
.lesson-row h3 { font-size: 21px; margin: 2px 0 4px; }
.lesson-row .ttl { font-size: 13px; color: var(--muted); }
.lesson-row .tag { font-size: 10px; letter-spacing: 0.1em; border: 1px solid var(--line); color: var(--muted); padding: 1px 8px; margin-left: 10px; vertical-align: 3px; font-family: var(--sans); font-weight: 400; }
.lesson-row .stat { font-size: 12px; color: var(--muted); }
.lesson-row .stat .row { display: flex; justify-content: space-between; margin-bottom: 8px; }
.lesson-row .stat .state { color: var(--ink); }
.lesson-row .stat, .lesson-row .stat .bar, .resume .meta .bar, .overall .bar { display: block; }
.lesson-row.is-done .stat .state { color: var(--ok); }
.lesson-row.is-done .bar span { background: var(--ok); }
.lesson-row .cta { font-size: 12px; letter-spacing: 0.12em; padding: 10px 18px; background: var(--ink); color: #fff; white-space: nowrap; min-width: 108px; text-align: center; }
.lesson-row.is-done .cta { background: #fff; color: var(--ink); box-shadow: inset 0 0 0 1px var(--ink); }
.crumb span { margin: 0 10px; color: #c9c3b8; }
.crumb #crumb-ch { margin: 0; color: var(--muted); }

/* 3つの姿勢 */
.soft { background: var(--ivory); }
.three { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.three .item { padding: 40px 36px; }
.three .item + .item { border-left: 1px solid var(--line); }
.three .n { font-family: var(--serif); color: var(--accent); font-size: 13px; letter-spacing: 0.2em; }
.three h3 { font-size: 19px; margin: 10px 0 12px; }
.three p { margin: 0; font-size: 14px; }

/* 進め方 */
.help { margin: 56px auto 0; max-width: 720px; text-align: center; padding: 32px 28px; background: var(--ivory); border: 1px solid var(--line); }
.help h3 { font-size: 18px; margin: 6px 0 8px; }
.help p { margin: 0; font-size: 14px; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; list-style: none; padding: 0; margin: 0; counter-reset: s; }
.steps li { counter-increment: s; border-top: 1px solid var(--ink); padding-top: 20px; font-size: 14px; }
.steps li::before { content: "STEP 0" counter(s); display: block; font-family: var(--serif); font-size: 11px; letter-spacing: 0.24em; color: var(--accent); margin-bottom: 6px; }
.steps b { display: block; font-family: var(--serif); color: var(--ink); font-size: 17px; font-weight: 600; margin-bottom: 6px; letter-spacing: 0.1em; }

/* ===== 講座ページ ===== */
.lesson-top { background: var(--ivory); border-bottom: 1px solid var(--line); }
.lesson-top .wrap { padding-top: 40px; padding-bottom: 36px; }
.crumb { font-size: 12px; color: var(--muted); margin-bottom: 18px; }
.crumb a { text-decoration: none; }
.crumb a:hover { color: var(--accent); }
.lesson-top h1 { font-size: clamp(24px, 3.4vw, 34px); margin: 8px 0 10px; }
.lesson-top .catch { margin: 0; max-width: 720px; }

.player-layout { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 40px; padding-top: 40px; padding-bottom: 40px; align-items: start; }

.video { position: relative; aspect-ratio: 16 / 9; background: #1e2b3c; color: rgba(255, 255, 255, .75); display: grid; place-items: center; text-align: center; font-size: 13px; letter-spacing: 0.12em; overflow: hidden; }
.video iframe, .video video { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; background: #000; }
.video .ph { padding: 0 20px; line-height: 2; }
.video .ph .play-badge { position: static; transform: none; margin: 0 auto 16px; }

.now { display: flex; justify-content: space-between; align-items: flex-start; gap: 20px; padding: 22px 0 26px; border-bottom: 1px solid var(--line); }
.now .label { display: block; }
.now h2 { font-size: 20px; margin-top: 4px; }
.now .actions { display: flex; gap: 10px; flex: none; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; font-size: 13px; letter-spacing: 0.12em; padding: 13px 26px; border: 1px solid var(--ink); background: var(--ink); color: #fff; cursor: pointer; text-decoration: none; transition: opacity .2s, background .2s; white-space: nowrap; }
.btn:hover { opacity: .88; }
.btn.ghost { background: #fff; color: var(--ink); }
.btn.ok { background: var(--ok); border-color: var(--ok); }
.btn[disabled] { opacity: .35; cursor: default; }

/* 動画一覧（右側） */
.chapters { border: 1px solid var(--line); background: #fff; position: sticky; top: 92px; }
.chapters-head { padding: 20px 22px 18px; border-bottom: 1px solid var(--line); }
.chapters-head .row { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 10px; }
.chapters-head b { font-family: var(--serif); font-weight: 600; color: var(--ink); font-size: 15px; letter-spacing: 0.1em; }
.chapters-head span { font-size: 12px; color: var(--muted); }
.chapter-list { list-style: none; margin: 0; padding: 0; max-height: 560px; overflow-y: auto; }
.chapter-list button { width: 100%; display: grid; grid-template-columns: 22px 1fr auto; gap: 12px; align-items: center; text-align: left; background: none; border: 0; border-bottom: 1px solid var(--line); padding: 15px 22px; cursor: pointer; font-size: 13px; line-height: 1.7; color: var(--text); letter-spacing: 0.04em; }
.chapter-list li:last-child button { border-bottom: 0; }
.chapter-list button:hover { background: var(--ivory); }
.chapter-list .mark { width: 22px; height: 22px; border-radius: 50%; border: 1px solid #d6d0c6; display: grid; place-items: center; }
.chapter-list .is-done .mark { background: var(--ok); border-color: var(--ok); }
.chapter-list .is-done .mark::after { content: ""; width: 7px; height: 4px; border-left: 1.5px solid #fff; border-bottom: 1.5px solid #fff; transform: rotate(-45deg) translate(1px, -1px); }
.chapter-list .cn { display: block; font-family: var(--serif); font-size: 11px; color: var(--accent); letter-spacing: 0.14em; line-height: 1.4; }
.chapter-list .cta { font-size: 11px; letter-spacing: 0.1em; padding: 6px 12px; background: var(--ink); color: #fff; white-space: nowrap; }
.chapter-list .is-done .cta { background: #fff; color: var(--muted); box-shadow: inset 0 0 0 1px var(--line); }
.chapter-list .is-current button { background: var(--accent-soft); color: var(--ink); font-weight: 500; }
.chapter-list .is-current .mark { border-color: var(--accent); }
.chapter-list .is-current .cta { background: var(--accent); color: #fff; box-shadow: none; }

/* メニュー（三本線） */
.menu-btn { width: 40px; height: 40px; border: 1px solid var(--line); background: #fff; cursor: pointer; display: flex; flex-direction: column; justify-content: center; align-items: center; gap: 5px; padding: 0; }
.menu-btn i { display: block; width: 16px; height: 1px; background: var(--ink); }
.drawer-bg { position: fixed; inset: 0; background: rgba(30, 43, 60, .35); z-index: 40; }
.drawer { position: fixed; top: 0; right: 0; bottom: 0; width: min(380px, 88vw); background: #fff; z-index: 50; padding: 22px 28px 32px; overflow-y: auto; box-shadow: -12px 0 40px rgba(30, 43, 60, .12); }
.drawer[hidden], .drawer-bg[hidden] { display: none; }
.drawer-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.drawer-close { width: 40px; height: 40px; border: 0; background: none; cursor: pointer; position: relative; }
.drawer-close::before, .drawer-close::after { content: ""; position: absolute; left: 11px; top: 19px; width: 18px; height: 1px; background: var(--ink); transform: rotate(45deg); }
.drawer-close::after { transform: rotate(-45deg); }
.drawer-home { display: block; padding: 14px 0; border-bottom: 1px solid var(--line); text-decoration: none; font-family: var(--serif); color: var(--ink); font-size: 16px; letter-spacing: 0.12em; }
.drawer-list { list-style: none; margin: 0; padding: 0; }
.drawer-list a { display: grid; grid-template-columns: 36px 1fr auto; align-items: center; gap: 8px; padding: 15px 0; border-bottom: 1px solid var(--line); text-decoration: none; font-size: 14px; }
.drawer-list a:hover, .drawer-list a.is-here { color: var(--accent); }
.drawer-list .dn { font-family: var(--serif); color: var(--accent); }
.drawer-list .dc { font-size: 12px; color: var(--muted); }
.drawer-list a.is-done .dc { color: var(--ok); }
.drawer-note { font-size: 12px; color: var(--muted); margin-top: 24px; }

/* 修了 */
.complete { display: none; margin-top: 28px; padding: 32px; text-align: center; background: var(--ivory); border: 1px solid var(--line); }
.complete.show { display: block; }
.complete h3 { font-size: 20px; margin: 8px 0 8px; }
.complete p { margin: 0 0 20px; font-size: 14px; }

/* タブ（今日のゴール・習慣） */
.tabs { display: flex; gap: 36px; border-bottom: 1px solid var(--line); margin-top: 36px; }
.tabs button { background: none; border: 0; padding: 0 0 14px; font-size: 14px; letter-spacing: 0.12em; color: var(--muted); cursor: pointer; border-bottom: 2px solid transparent; margin-bottom: -1px; }
.tabs button[aria-selected="true"] { color: var(--ink); border-color: var(--ink); }
.panel { padding: 30px 0 8px; }
.panel[hidden] { display: none; }

.goal-list { list-style: none; padding: 0; margin: 0; counter-reset: g; }
.goal-list li { counter-increment: g; display: grid; grid-template-columns: 44px 1fr; padding: 14px 0; border-bottom: 1px solid var(--line); }
.goal-list li::before { content: "0" counter(g); font-family: var(--serif); color: var(--accent); font-size: 15px; }

/* 習慣チェック */
.habit-intro { margin: 0 0 18px; font-size: 14px; }
.habit { display: flex; align-items: flex-start; gap: 14px; padding: 14px 16px; border: 1px solid var(--line); margin-bottom: -1px; cursor: pointer; font-size: 14px; line-height: 1.8; transition: background .2s; }
.habit:hover { background: var(--ivory); }
.habit input { width: 18px; height: 18px; accent-color: var(--ok); margin: 3px 0 0; flex: none; }
.habit.is-chosen { background: var(--ok-soft); position: relative; }
.add-habit { display: flex; gap: 8px; margin: 18px 0 0; }
.add-habit input { flex: 1; min-width: 0; font: inherit; font-size: 16px; padding: 11px 14px; border: 1px solid var(--line); background: #fff; }
.add-habit .btn { padding: 11px 20px; }

.tracker { margin-top: 36px; overflow-x: auto; }
.tracker h3 { font-size: 16px; margin-bottom: 4px; }
.tracker .empty { color: var(--muted); font-size: 13px; margin: 0 0 12px; }
.tracker table { border-collapse: collapse; width: 100%; min-width: 460px; font-size: 13px; }
.tracker th { font-weight: 400; color: var(--muted); font-size: 11px; line-height: 1.5; padding: 6px 2px; }
.tracker td { border-top: 1px solid var(--line); padding: 10px 2px; text-align: center; }
.tracker th:first-child, .tracker td:first-child { text-align: left; width: 42%; padding-right: 10px; }
.tracker td button { width: 28px; height: 28px; border-radius: 50%; border: 1px solid var(--line); background: #fff; cursor: pointer; position: relative; }
.tracker td button.on { background: var(--ok); border-color: var(--ok); }
.tracker td button.on::after { content: ""; position: absolute; left: 9px; top: 9px; width: 8px; height: 4px; border-left: 1.5px solid #fff; border-bottom: 1.5px solid #fff; transform: rotate(-45deg); }

/* 前後の講座 */
.lesson-nav { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line); margin-top: 56px; }
.lesson-nav a { padding: 28px 8px; text-decoration: none; font-family: var(--serif); color: var(--ink); font-size: 17px; letter-spacing: 0.1em; }
.lesson-nav a:hover { color: var(--accent); }
.lesson-nav small { display: block; font-family: var(--sans); font-size: 11px; color: var(--muted); letter-spacing: 0.2em; }
.lesson-nav .next { text-align: right; border-left: 1px solid var(--line); }

/* パスワード画面 */
.unlock { max-width: 460px; margin: 96px auto; padding: 48px 40px; border: 1px solid var(--line); text-align: center; background: #fff; }
.unlock h1 { font-size: 22px; margin: 10px 0 12px; }
.unlock p { font-size: 14px; }
.unlock input[type="password"] { width: 100%; font: inherit; font-size: 16px; padding: 13px 16px; border: 1px solid var(--line); margin: 12px 0 20px; text-align: center; letter-spacing: 0.2em; }
.unlock .btn { width: 100%; }
.unlock .hint { font-size: 13px; color: var(--muted); margin-top: -4px; }
.unlock .target { font-size: 12px; color: var(--muted); margin: 18px 0 0; }
.unlock .target[hidden] { display: none; }
.unlock .error { color: #a1503a; display: none; }
.unlock .error.show { display: block; }
.unlock .note { color: var(--muted); font-size: 12px; margin-top: 24px; }

footer { border-top: 1px solid var(--line); padding: 40px 0; text-align: center; font-size: 11px; color: var(--muted); letter-spacing: 0.1em; line-height: 2.2; }

/* ===== タブレット・スマホ ===== */
@media (max-width: 960px) {
  .hero .wrap { grid-template-columns: 1fr; gap: 40px; padding-top: 56px; padding-bottom: 56px; }
  .player-layout { grid-template-columns: 1fr; gap: 0; padding-top: 0; }
  .player-layout > .main { order: 1; }
  .player-layout > aside { order: 2; margin-top: 28px; }
  .chapters { position: static; }
  .chapter-list { max-height: none; }
  .video-wrap { margin: 0 -32px; }
}
@media (max-width: 680px) {
  body { font-size: 15px; }
  .wrap { padding: 0 20px; }
  .video-wrap { margin: 0 -20px; }
  .nav .link { display: none; }
  .hero .wrap { padding-top: 40px; padding-bottom: 44px; gap: 28px; }
  .hero h1 { font-size: 25px; letter-spacing: 0.06em; margin: 12px 0 8px; }
  .hero .sub { font-size: 14px; margin-bottom: 0; letter-spacing: 0.08em; }
  .hero .desc { display: none; }
  .teacher { margin-top: 20px; padding-top: 16px; }
  .lesson-top h1 { font-size: 22px; letter-spacing: 0.06em; }
  section { padding: 64px 0; }
  .sec-head { margin-bottom: 36px; }
  .lesson-row { grid-template-columns: 44px 1fr; gap: 6px 14px; padding: 24px 4px; }
  .lesson-row .num { font-size: 28px; text-align: left; align-self: start; }
  .lesson-row h3 { font-size: 18px; }
  .lesson-row .stat { grid-column: 2; }
  .lesson-row .cta { grid-column: 2; justify-self: stretch; margin-top: 8px; padding: 11px; }
  .chapter-list button { padding: 14px 16px; }
  .nav { gap: 14px; }
  .nav .total { gap: 6px; }
  .three { grid-template-columns: 1fr; }
  .three .item { padding: 28px 4px; }
  .three .item + .item { border-left: 0; border-top: 1px solid var(--line); }
  .steps { grid-template-columns: 1fr; gap: 24px; }
  .help { margin-top: 40px; padding: 26px 18px; text-align: left; }
  br.pc { display: none; }
  .now { flex-direction: column; gap: 14px; }
  .now .actions { width: 100%; }
  .now .actions .btn { flex: 1; padding: 13px 10px; }
  .tabs { gap: 28px; }
  .lesson-nav a { font-size: 15px; padding: 22px 4px; }
  .unlock { margin: 48px auto; padding: 36px 24px; }
}