@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;700&display=swap');

:root {
  --bg: #FDF7F8;
  --paper: #FFFFFF;
  --ink: #2E2226;
  --ink-soft: #7A6670;
  --accent: #D6698F;
  --accent-deep: #A84770;
  --sage: #8C6B7A;
  --sage-tint: #F2E9EC;
  --accent-tint: #FBE6ED;
  --line: #F0DCE2;
  --max: 720px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 16px;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, .serif {
  font-family: 'Noto Sans JP', sans-serif;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink);
}

a { color: inherit; text-decoration: none; }

img { max-width: 100%; display: block; }

/* ---- top nav ---- */
.topnav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(250, 247, 243, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}
.topnav-inner {
  max-width: 1000px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 17px;
  font-weight: 700;
}
.brand span { color: var(--accent); }
.topnav-links {
  display: flex;
  gap: 22px;
  font-size: 13px;
  color: var(--ink-soft);
}
.topnav-links a:hover { color: var(--accent); }

/* ---- hero (index) ---- */
.hero {
  max-width: 1000px;
  margin: 0 auto;
  padding: 88px 24px 64px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}
.hero-eyebrow {
  color: var(--accent);
  font-size: 13px;
  margin-bottom: 18px;
  letter-spacing: 0.08em;
}
.hero h1 {
  font-size: 40px;
  line-height: 1.5;
  margin: 0 0 22px;
}
.hero p {
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.9;
  max-width: 46ch;
}
.hero-mark {
  width: 100%;
  aspect-ratio: 4/5;
  border-radius: 2px;
  background:
    radial-gradient(circle at 30% 25%, var(--accent-tint), transparent 60%),
    radial-gradient(circle at 75% 70%, var(--sage-tint), transparent 55%),
    var(--paper);
  border: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}
.hero-mark::after {
  content: "痩せようとしない、\A心を整える3ヶ月";
  white-space: pre;
  position: absolute;
  left: 32px;
  bottom: 32px;
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 22px;
  line-height: 1.7;
  color: var(--ink);
}

/* ---- section shell ---- */
.section {
  max-width: 1000px;
  margin: 0 auto;
  padding: 64px 24px;
}
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  padding-bottom: 18px;
  margin-bottom: 36px;
}
.section-head h2 { font-size: 24px; margin: 0; }
.section-head .note { color: var(--ink-soft); font-size: 13px; }

/* ---- lesson index list ---- */
.lesson-list { list-style: none; margin: 0; padding: 0; }
.lesson-list li {
  display: grid;
  grid-template-columns: 56px 1fr auto;
  align-items: center;
  gap: 24px;
  padding: 22px 4px;
  border-bottom: 1px solid var(--line);
}
.lesson-num {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 22px;
  color: var(--accent);
}
.lesson-title { font-size: 16px; }
.lesson-title .kicker {
  display: block;
  font-size: 12px;
  color: var(--ink-soft);
  margin-bottom: 4px;
}
.lesson-go {
  font-size: 13px;
  color: var(--ink-soft);
  border: 1px solid var(--line);
  padding: 7px 16px;
  border-radius: 2px;
  transition: border-color .15s, color .15s;
}
.lesson-list a:hover .lesson-go {
  border-color: var(--accent);
  color: var(--accent);
}

.chapter-roadmap {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.chapter-roadmap .cell {
  background: var(--paper);
  padding: 20px 18px;
  font-size: 13px;
}
.chapter-roadmap .cell .cnum { color: var(--accent); font-family: 'Noto Sans JP', sans-serif; font-size: 15px; margin-right: 4px;}
.chapter-roadmap .cell.active { background: var(--accent-tint); }
.chapter-roadmap .cell.disabled { color: var(--ink-soft); }
.chapter-roadmap .cell .status { display:block; font-size: 11px; color: var(--ink-soft); margin-top: 4px; }

/* ---- lesson page ---- */
.lesson-shell { max-width: var(--max); margin: 0 auto; padding: 56px 24px 96px; }
.lesson-kicker {
  color: var(--accent);
  font-size: 13px;
  margin-bottom: 14px;
}
.lesson-shell h1 {
  font-size: 30px;
  line-height: 1.6;
  margin: 0 0 34px;
}

.video-frame {
  border: 1px solid var(--line);
  background: var(--paper);
  aspect-ratio: 16/9;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  margin-bottom: 12px;
  overflow: hidden;
}
.video-frame.has-video {
  padding: 0;
  border: none;
  background: #000;
}
.video-frame.has-video iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}
.video-frame .play {
  width: 56px; height: 56px;
  border-radius: 50%;
  border: 1.5px solid var(--accent);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 14px;
}
.video-frame .play::after {
  content: "";
  width: 0; height: 0;
  border-top: 8px solid transparent;
  border-bottom: 8px solid transparent;
  border-left: 13px solid var(--accent);
  margin-left: 3px;
}
.video-frame .placeholder-text {
  text-align: center;
  color: var(--ink-soft);
  font-size: 13px;
}
.video-caption {
  font-size: 12px;
  color: var(--ink-soft);
  margin: 0 0 48px;
}

.article p { margin: 0 0 26px; font-size: 15.5px; }
.article h2 {
  font-size: 20px;
  margin: 48px 0 22px;
  padding-top: 4px;
}
.article .lede {
  font-size: 16.5px;
  font-weight: 500;
  line-height: 1.95;
  color: var(--ink);
}

.worksheet-card {
  margin: 56px 0 8px;
  border: 1px solid var(--line);
  background: var(--sage-tint);
  padding: 26px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.worksheet-card .wtitle { font-size: 15px; margin-bottom: 4px; }
.worksheet-card .wnote { font-size: 12.5px; color: var(--ink-soft); }
.worksheet-card .wbtn {
  flex-shrink: 0;
  background: var(--sage);
  color: #fff;
  font-size: 13px;
  padding: 11px 22px;
  border-radius: 2px;
  white-space: nowrap;
}

.lesson-nav {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--ink-soft);
}
.lesson-nav a:hover { color: var(--accent); }
.lesson-nav .dir { display: block; font-size: 11px; margin-bottom: 4px; }
.lesson-nav .next { text-align: right; }

footer {
  border-top: 1px solid var(--line);
  padding: 40px 24px;
  text-align: center;
  color: var(--ink-soft);
  font-size: 12px;
}

/* ---- login gate ---- */
.gate-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.gate-box {
  max-width: 380px;
  width: 100%;
  text-align: center;
  padding: 48px 36px;
  background: var(--paper);
  border: 1px solid var(--line);
}
.gate-box .brand { justify-content: center; margin-bottom: 22px; font-size: 15px; }
.gate-box h1 { font-size: 22px; margin: 0 0 12px; }
.gate-box p { color: var(--ink-soft); font-size: 13.5px; margin: 0 0 28px; line-height: 1.8; }
.gate-box .wbtn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-size: 14px;
  padding: 13px 32px;
  border-radius: 2px;
  cursor: pointer;
  border: none;
}
.gate-box .wbtn:hover { background: var(--accent-deep); }
#logoutLink { cursor: pointer; }

@media (max-width: 760px) {
  .hero { grid-template-columns: 1fr; padding-top: 56px; }
  .hero h1 { font-size: 30px; }
  .chapter-roadmap { grid-template-columns: 1fr; }
  .lesson-list li { grid-template-columns: 40px 1fr; }
  .lesson-list .lesson-go { display: none; }
  .worksheet-card { flex-direction: column; align-items: flex-start; }
}

/* =====================================================================
   会員ポータル（ダッシュボード型UI）  ※ 2026 リニューアル
   ===================================================================== */

:root {
  --sidebar-w: 264px;
  --grad: linear-gradient(120deg, var(--accent) 0%, var(--accent-deep) 100%);
  --ok: #4E9A6B;
}

/* ---- app shell ---- */
.app {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
  min-height: 100vh;
}

/* ---- sidebar ---- */
.sidebar {
  background: var(--paper);
  border-right: 1px solid var(--line);
  padding: 22px 18px 28px;
  display: flex;
  flex-direction: column;
  gap: 22px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}
.sidebar .brand { font-size: 14px; display: block; line-height: 1.55; word-break: keep-all; letter-spacing: 0; }

.side-nav { display: flex; flex-direction: column; gap: 4px; }
.side-nav .side-group {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  margin: 14px 8px 6px;
}
.side-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: 8px;
  font-size: 13.5px;
  color: var(--ink);
  transition: background .15s, color .15s;
}
.side-nav a .ic { width: 18px; text-align: center; font-size: 12px; flex-shrink: 0; }
.side-nav a:hover { background: var(--sage-tint); }
.side-nav a.active { background: var(--accent-tint); color: var(--accent-deep); font-weight: 700; }
.side-nav a.is-done .ic { color: var(--ok); opacity: 1; }

.sidebar-foot { margin-top: auto; display: flex; flex-direction: column; gap: 10px; }
.sidebar-foot a {
  font-size: 12.5px;
  color: var(--ink-soft);
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  text-align: center;
  cursor: pointer;
}
.sidebar-foot a:hover { border-color: var(--accent); color: var(--accent); }

/* ---- mobile top bar + drawer ---- */
.mobilebar { display: none; }
.scrim { display: none; }

@media (max-width: 900px) {
  .app { grid-template-columns: 1fr; }
  .mobilebar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    position: sticky; top: 0; z-index: 40;
  }
  .mobilebar .brand { font-size: 14px; }
  .hamb {
    border: 1px solid var(--line);
    background: var(--paper);
    border-radius: 8px;
    width: 38px; height: 34px;
    font-size: 15px;
    cursor: pointer;
  }
  .sidebar {
    position: fixed;
    left: 0; top: 0; bottom: 0;
    width: 280px;
    transform: translateX(-100%);
    transition: transform .22s ease;
    z-index: 50;
    height: 100%;
  }
  .sidebar.open { transform: translateX(0); }
  .scrim.show {
    display: block;
    position: fixed; inset: 0;
    background: rgba(46,34,38,.35);
    z-index: 45;
  }
}

/* ---- main column ---- */
.main {
  padding: 40px 40px 80px;
  max-width: 920px;
  width: 100%;
  min-width: 0;
}
@media (max-width: 900px) { .main { padding: 24px 18px 64px; } }

.page-title {
  font-size: 15px;
  color: var(--ink-soft);
  letter-spacing: .04em;
  margin-bottom: 22px;
}
.breadcrumb {
  font-size: 12.5px;
  color: var(--ink-soft);
  margin-bottom: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { opacity: .5; }

/* ---- course header card ---- */
.course-head {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--paper);
  padding: 30px 30px 26px;
  margin-bottom: 22px;
}
.course-head h1 { font-size: 26px; margin: 0 0 10px; }
.course-head p { color: var(--ink-soft); font-size: 14px; margin: 0 0 22px; }

.progress-row { display: flex; align-items: center; gap: 16px; }
.progress-track {
  flex: 1;
  height: 10px;
  border-radius: 999px;
  background: var(--sage-tint);
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  width: 0%;
  border-radius: 999px;
  background: var(--grad);
  transition: width .5s ease;
}
.progress-label {
  font-size: 13px;
  color: var(--ink-soft);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

/* ---- resume CTA ---- */
.resume-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin: 24px 0 4px;
  padding: 20px 24px;
  border-radius: 12px;
  background: var(--grad);
  color: #fff;
  transition: transform .15s, box-shadow .15s;
}
.resume-card:hover { transform: translateY(-1px); box-shadow: 0 10px 26px -14px var(--accent-deep); }
.resume-card .rc-eyebrow { font-size: 11.5px; opacity: .85; letter-spacing: .06em; }
.resume-card .rc-title { font-family: 'Noto Sans JP', sans-serif; font-size: 17px; margin-top: 3px; }
.resume-card .rc-arrow { font-size: 20px; flex-shrink: 0; }

/* ---- roadmap stepper ---- */
.roadmap-wrap {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--paper);
  padding: 24px 8px 22px;
  margin-bottom: 22px;
  overflow-x: auto;
}
.roadmap-wrap h2 { font-size: 15px; margin: 0 0 18px 20px; }
.roadmap {
  display: flex;
  align-items: flex-start;
  min-width: max-content;
  padding: 0 20px;
}
.rm-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 118px;
  text-align: center;
  position: relative;
}
.rm-step + .rm-step::before {
  content: "";
  position: absolute;
  top: 19px;
  left: -59px;
  width: 118px;
  height: 2px;
  background: var(--line);
}
.rm-step.done + .rm-step::before,
.rm-step.done::before { background: var(--accent); }
.rm-dot {
  width: 40px; height: 40px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px;
  font-family: 'Noto Sans JP', sans-serif;
  background: var(--paper);
  border: 2px solid var(--line);
  color: var(--ink-soft);
  position: relative;
  z-index: 1;
}
.rm-step.todo .rm-dot { }
.rm-step.partial .rm-dot { border-color: #E0A23C; color: #C4832A; }
.rm-step.current .rm-dot { border-color: var(--accent); color: var(--accent-deep); box-shadow: 0 0 0 4px var(--accent-tint); }
.rm-step.done .rm-dot { background: var(--accent); border-color: var(--accent); color: #fff; }
.rm-label { font-size: 11.5px; margin-top: 8px; line-height: 1.5; color: var(--ink); }
.rm-count { font-size: 10.5px; color: var(--ink-soft); margin-top: 2px; font-variant-numeric: tabular-nums; }
.rm-step a { display: flex; flex-direction: column; align-items: center; }
.rm-step a:hover .rm-label { color: var(--accent); }

/* ---- chapter accordion ---- */
.chapter {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--paper);
  margin-bottom: 12px;
  overflow: hidden;
}
.chapter-head {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 22px;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  color: inherit;
}
.chapter-head:hover { background: var(--sage-tint); }
.chapter-badge {
  width: 34px; height: 34px;
  border-radius: 9px;
  background: var(--accent-tint);
  color: var(--accent-deep);
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 14px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.chapter-head.all-done .chapter-badge { background: var(--accent); color: #fff; }
.chapter-meta { flex: 1; min-width: 0; }
.chapter-meta .ch-title { font-family: 'Noto Sans JP', sans-serif; font-weight: 700; font-size: 15.5px; }
.chapter-meta .ch-sub { font-size: 12px; color: var(--ink-soft); margin-top: 2px; }
.chapter-count {
  font-size: 11.5px;
  color: var(--ink-soft);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}
.chapter-chevron { font-size: 12px; color: var(--ink-soft); transition: transform .2s; }
.chapter.open .chapter-chevron { transform: rotate(180deg); }

.chapter-body { display: none; border-top: 1px solid var(--line); }
.chapter.open .chapter-body { display: block; }

.lesson-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 15px 22px;
  border-bottom: 1px solid var(--line);
  transition: background .12s;
}
.lesson-row:last-child { border-bottom: none; }
.lesson-row:hover { background: var(--accent-tint); }
.lesson-row .lr-icon {
  width: 26px; height: 26px;
  border-radius: 50%;
  border: 1.5px solid var(--line);
  display: flex; align-items: center; justify-content: center;
  font-size: 11px;
  color: var(--accent);
  flex-shrink: 0;
}
.lesson-row.done .lr-icon { background: var(--ok); border-color: var(--ok); color: #fff; }
.lesson-row .lr-body { flex: 1; min-width: 0; }
.lesson-row .lr-kicker { font-size: 10.5px; color: var(--ink-soft); }
.lesson-row .lr-title { font-size: 13.5px; margin-top: 1px; }
.lesson-row.done .lr-title { color: var(--ink-soft); }
.lesson-row .lr-type {
  font-size: 10.5px;
  color: var(--sage);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 3px 10px;
  white-space: nowrap;
}
.lesson-row .lr-go { font-size: 15px; color: var(--ink-soft); }
.lesson-row:hover .lr-go { color: var(--accent); }

/* ---- lesson page: completion bar ---- */
.complete-bar {
  margin: 40px 0 0;
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--sage-tint);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.complete-bar .cb-text { font-size: 13px; color: var(--ink-soft); }
.complete-btn {
  border: none;
  background: var(--accent);
  color: #fff;
  font-family: inherit;
  font-size: 13.5px;
  padding: 11px 24px;
  border-radius: 8px;
  cursor: pointer;
  white-space: nowrap;
  transition: background .15s;
}
.complete-btn:hover { background: var(--accent-deep); }
.complete-bar.is-done { background: #EAF3EE; border-color: #CDE5D6; }
.complete-bar.is-done .complete-btn { background: var(--paper); color: var(--ok); border: 1px solid #CDE5D6; }

/* lesson page main uses .lesson-shell already defined; tighten for app shell */
.app .lesson-shell { padding: 8px 0 40px; max-width: var(--max); }

/* ===================== スマホ最適化 ===================== */
@media (max-width: 900px) {
  .main { padding: 20px 16px 72px; }
  .lesson-shell h1 { font-size: 23px; line-height: 1.55; margin-bottom: 24px; }
  .article p { font-size: 15px; margin-bottom: 22px; }
  .article h2 { font-size: 17.5px; margin: 34px 0 16px; }
  .worksheet-card { margin: 40px 0 8px; padding: 20px; flex-direction: column; align-items: flex-start; }
  .worksheet-card .wbtn { width: 100%; text-align: center; padding: 13px; }
  .video-caption { margin-bottom: 36px; }
}

@media (max-width: 600px) {
  .course-head { padding: 22px 18px 20px; border-radius: 12px; }
  .course-head h1 { font-size: 18px; line-height: 1.55; letter-spacing: 0; }
  .course-head p { font-size: 13px; margin-bottom: 18px; }
  .progress-row { gap: 12px; }
  .progress-label { font-size: 12px; }

  .resume-card { padding: 16px 18px; gap: 12px; border-radius: 10px; }
  .resume-card .rc-title { font-size: 14.5px; line-height: 1.5; }
  .resume-card .rc-arrow { font-size: 17px; }

  .roadmap-wrap { padding: 20px 0 18px; }
  .roadmap-wrap h2 { margin-left: 18px; }
  .roadmap { padding: 0 14px; }
  .rm-step { width: 92px; }
  .rm-step + .rm-step::before { left: -46px; width: 92px; }

  .chapter { border-radius: 10px; }
  .chapter-head { padding: 14px 15px; gap: 12px; }
  .chapter-badge { width: 30px; height: 30px; font-size: 13px; }
  .chapter-meta .ch-title { font-size: 14.5px; }
  .chapter-meta .ch-sub { display: none; }
  .chapter-count { font-size: 11px; }

  .lesson-row { padding: 13px 15px; gap: 12px; }
  .lesson-row .lr-title { font-size: 13px; }
  .lesson-row .lr-type { display: none; }

  .complete-bar { flex-direction: column; align-items: stretch; text-align: center; margin-top: 32px; padding: 20px; }
  .complete-btn { width: 100%; padding: 13px; }

  .lesson-nav { flex-direction: column; gap: 18px; }
  .lesson-nav .next { text-align: left; }

  .breadcrumb { margin-bottom: 18px; }
}

@media (max-width: 380px) {
  .rm-step { width: 84px; }
  .rm-step + .rm-step::before { left: -42px; width: 84px; }
}

/* =====================================================================
   ワークブック（workbook.html）
   ===================================================================== */
.worksheet-card { transition: border-color .15s, background .15s; }
.worksheet-card:hover { border-color: var(--accent); background: var(--accent-tint); }
.worksheet-card:hover .wbtn { background: var(--accent-deep); }

.wb-hero h1 { font-size: 24px; margin: 0 0 10px; }
.wb-toolbar { display: flex; align-items: center; gap: 14px; margin: 18px 0 20px; flex-wrap: wrap; }
.wb-print {
  border: none;
  background: var(--grad);
  color: #fff;
  font-family: inherit;
  font-size: 13px;
  padding: 10px 20px;
  border-radius: 999px;
  cursor: pointer;
}
.wb-autosave-note { font-size: 12px; color: var(--ink-soft); }
.wb-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  border-top: 1px solid var(--line);
  padding-top: 18px;
}
.wb-toc a {
  font-size: 12px;
  padding: 6px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink-soft);
  transition: border-color .15s, color .15s;
}
.wb-toc a:hover { border-color: var(--accent); color: var(--accent); }

.wb-chapter { margin: 40px 0 8px; }
.wb-chapter-title {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 19px;
  padding-bottom: 12px;
  margin: 0 0 20px;
  border-bottom: 2px solid var(--accent-tint);
}
.wb-chapter-num {
  color: #fff;
  background: var(--grad);
  font-size: 12px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 999px;
}
.wb-chapter-sub { font-size: 12px; color: var(--ink-soft); font-weight: 400; }

.wb-card {
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  border-radius: 12px;
  background: var(--paper);
  padding: 0 0 22px;
  margin-bottom: 18px;
  overflow: hidden;
}
.wb-head {
  background:
    radial-gradient(circle at 12% 0%, var(--accent-tint), transparent 55%),
    var(--sage-tint);
  padding: 18px 24px 16px;
  border-bottom: 1px solid var(--line);
}
.wb-badge {
  display: inline-block;
  font-size: 11px;
  color: var(--accent-deep);
  background: #fff;
  border: 1px solid var(--accent-tint);
  padding: 3px 11px;
  border-radius: 999px;
  margin-bottom: 8px;
}
.wb-title { font-size: 16px; margin: 0; line-height: 1.6; }
.wb-intro {
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.85;
  margin: 16px 24px 6px;
}
.wb-field { display: block; margin: 16px 24px 0; }
.wb-flabel {
  display: block;
  font-size: 13.5px;
  font-weight: 500;
  margin-bottom: 7px;
  line-height: 1.7;
}
.wb-field textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  padding: 11px 13px;
  font-family: inherit;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink);
  resize: vertical;
  transition: border-color .15s, background .15s;
}
.wb-field textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: #fff;
}
.wb-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: 20px 24px 0;
  flex-wrap: wrap;
}
.wb-lesson-link { font-size: 12.5px; color: var(--accent-deep); }
.wb-lesson-link:hover { color: var(--accent); text-decoration: underline; }
.wb-saved { font-size: 12px; color: var(--ok); }

@media (max-width: 600px) {
  .wb-hero h1 { font-size: 20px; }
  .wb-chapter-title { font-size: 16px; }
  .wb-head { padding: 16px 16px 14px; }
  .wb-intro { margin-left: 16px; margin-right: 16px; }
  .wb-field { margin-left: 16px; margin-right: 16px; }
  .wb-foot { margin-left: 16px; margin-right: 16px; }
}

/* ---- 印刷（ワークブックを手書き用に） ---- */
@media print {
  .sidebar, .mobilebar, .scrim, footer,
  .wb-toolbar, .wb-toc, .side-nav { display: none !important; }
  .app { display: block; }
  .main { max-width: 100%; padding: 0; }
  .wb-hero { border: none; padding: 0 0 12px; }
  .wb-card {
    break-inside: avoid;
    page-break-inside: avoid;
    border: 1px solid #ccc;
    border-left: 3px solid #999;
    box-shadow: none;
  }
  .wb-head { background: #f3f3f3 !important; -webkit-print-color-adjust: exact; }
  .wb-field textarea {
    border: 1px solid #bbb;
    background: #fff !important;
    min-height: 64px;
  }
  #siteContent { display: block !important; }
  #gateScreen { display: none !important; }
}