html:has(.tsumu-product-body) {
  --tsumu-product-bg: #0b1120;
  --tsumu-product-sidebar: #080d18;
  --tsumu-product-surface: #162033;
  --tsumu-product-surface-raised: #1b273b;
  --tsumu-product-surface-soft: #202c40;
  --tsumu-product-text: #f8fafc;
  --tsumu-product-text-soft: #dbe4ef;
  --tsumu-product-muted: #a7b0be;
  --tsumu-product-border: #334155;
  --tsumu-product-gold: #ffc233;
  --tsumu-product-gold-hover: #ffd166;
  --tsumu-product-mint: #4ade80;
  --tsumu-product-coral: #f87171;
  --tsumu-product-shadow: 0 18px 48px rgba(0, 0, 0, 0.28);
  --tsumu-product-radius: 18px;
  min-width: 320px;
  background: var(--tsumu-product-bg);
}

.tsumu-product-body,
.tsumu-product-body *,
.tsumu-product-body *::before,
.tsumu-product-body *::after { box-sizing: border-box; }

.tsumu-product-body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 83% 8%, rgba(255, 194, 51, 0.06), transparent 28rem),
    linear-gradient(135deg, #07111f, var(--tsumu-product-bg) 62%, #08182b);
  color: var(--tsumu-product-text);
  font: 500 16px/1.5 "Nunito", "Noto Sans JP", ui-sans-serif, system-ui, sans-serif;
}

.tsumu-product-body :where(a, button, input, select, summary) { font: inherit; }
.tsumu-product-body a { color: inherit; text-decoration: none; }
.tsumu-product-body :where(a, button, input, select, summary):focus-visible {
  outline: 3px solid var(--tsumu-product-gold);
  outline-offset: 3px;
}
.tsumu-product-body svg { width: 24px; height: 24px; }
.tsumu-product-body button:disabled { cursor: not-allowed; opacity: 0.62; }

.tsumu-product-skip {
  position: fixed;
  z-index: 1000;
  top: 8px;
  left: 8px;
  padding: 10px 16px;
  border-radius: 10px;
  background: var(--tsumu-product-gold);
  color: #0f172a !important;
  transform: translateY(-150%);
}
.tsumu-product-skip:focus { transform: translateY(0); }

.tsumu-product-visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.tsumu-product-shell,
.tsumu-product-studio-shell { display: grid; min-height: 100vh; grid-template-columns: 244px minmax(0, 1fr); }

.tsumu-product-sidebar,
.tsumu-product-studio-sidebar {
  position: sticky;
  top: 0;
  display: flex;
  height: 100vh;
  flex-direction: column;
  padding: 28px 14px 18px;
  border-right: 1px solid rgba(255,255,255,.06);
  background: rgba(8, 13, 24, .94);
  backdrop-filter: blur(18px);
}

.tsumu-product-brand { display: inline-flex; min-height: 48px; align-items: center; }
.tsumu-product-brand .tsumu-original-logo.is-horizontal { width: 158px; height: 48px; }

.tsumu-product-sidebar-nav,
.tsumu-product-studio-sidebar nav { display: grid; gap: 8px; margin-top: 48px; }

.tsumu-product-nav-link,
.tsumu-product-studio-nav-link {
  display: flex;
  min-width: 0;
  min-height: 54px;
  align-items: center;
  gap: 16px;
  padding: 12px 16px;
  border-radius: 12px;
  color: var(--tsumu-product-text-soft);
}
.tsumu-product-nav-link:hover,
.tsumu-product-studio-nav-link:hover { background: rgba(255,255,255,.06); color: #fff; }
.tsumu-product-nav-link.is-active,
.tsumu-product-studio-nav-link.is-active {
  background: linear-gradient(110deg, #172235, #1c2a3e);
  color: var(--tsumu-product-gold);
  box-shadow: inset 3px 0 var(--tsumu-product-gold);
}

.tsumu-product-profile {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 10px;
  margin-top: auto;
  padding: 12px;
  border: 1px solid var(--tsumu-product-border);
  border-radius: 13px;
  background: rgba(255,255,255,.025);
}
.tsumu-product-profile > span:nth-child(2) { display: grid; min-width: 0; flex: 1; }
.tsumu-product-profile small { color: var(--tsumu-product-muted); }
.tsumu-product-profile-mark,
.tsumu-product-avatar {
  display: grid;
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  place-items: center;
  border: 2px solid var(--tsumu-product-gold);
  border-radius: 50%;
  background: #152036;
  color: var(--tsumu-product-gold);
  font-weight: 800;
}

.tsumu-product-stage,
.tsumu-product-studio-stage { min-width: 0; }
.tsumu-product-mobile-header,
.tsumu-product-bottom-nav,
.tsumu-product-studio-mobile-header { display: none; }
.tsumu-product-main,
.tsumu-product-studio-main { width: 100%; max-width: 1320px; margin: 0 auto; padding: 20px 24px 32px; }
.tsumu-product-studio-main { max-width: 1440px; padding-top: 30px; }

.tsumu-product-chip,
.tsumu-product-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--tsumu-product-border);
  border-radius: 999px;
  background: var(--tsumu-product-surface-soft);
  color: var(--tsumu-product-text-soft);
  font-size: .82rem;
  white-space: nowrap;
}
.tsumu-product-chip.is-preview { border-color: rgba(255,194,51,.35); background: rgba(255,194,51,.08); color: var(--tsumu-product-gold); }
.tsumu-product-status.is-success { border-color: rgba(74,222,128,.35); background: rgba(74,222,128,.08); color: #86efac; }
.tsumu-product-status.is-private { border-color: rgba(255,194,51,.4); background: rgba(255,194,51,.06); color: var(--tsumu-product-gold); }

.tsumu-product-button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: 12px;
  font-weight: 800;
  cursor: pointer;
}
.tsumu-product-button.is-primary { background: linear-gradient(135deg, #ffc233, #ffb800); color: #0f172a; box-shadow: 0 10px 24px rgba(255,194,51,.13); }
.tsumu-product-button.is-primary:hover { background: var(--tsumu-product-gold-hover); }
.tsumu-product-button.is-secondary { border-color: var(--tsumu-product-border); background: transparent; color: var(--tsumu-product-text); }
.tsumu-product-button.is-secondary:hover { border-color: var(--tsumu-product-gold); color: var(--tsumu-product-gold); }
.tsumu-product-button.is-compact { width: max-content; min-height: 42px; justify-self: start; margin-top: 12px; padding: 8px 18px; }
.tsumu-product-button-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.tsumu-product-text-link { display: inline-flex; min-height: 44px; align-items: center; gap: 8px; color: var(--tsumu-product-gold) !important; font-weight: 800; }

.tsumu-product-page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 28px;
  padding: 8px 8px 0;
}
.tsumu-product-page-header h1 { margin: 0; font-size: clamp(2rem, 4vw, 2.75rem); line-height: 1.1; letter-spacing: -.025em; }
.tsumu-product-page-header p { margin: 8px 0 0; color: var(--tsumu-product-muted); font-size: 1.05rem; }
.tsumu-product-page-actions { display: flex; align-items: center; gap: 12px; }

.tsumu-product-hero-card {
  display: grid;
  min-height: calc(100vh - 40px);
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, .85fr);
  gap: 12px 44px;
  padding: clamp(28px, 4vw, 52px);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 22px;
  background: linear-gradient(135deg, rgba(22,32,51,.96), rgba(13,31,51,.84));
  box-shadow: var(--tsumu-product-shadow);
}
.tsumu-product-hero-copy { align-self: center; padding-left: 18px; }
.tsumu-product-kicker-row { margin-bottom: 18px; }
.tsumu-product-overline { margin: 0 0 14px; color: var(--tsumu-product-gold); font-size: 1.06rem; font-weight: 800; }
.tsumu-product-hero-copy h1 { max-width: 620px; margin: 0; font-size: clamp(2.35rem, 4.2vw, 4rem); line-height: 1.08; letter-spacing: -.035em; }
.tsumu-product-lead { margin: 14px 0 0; color: var(--tsumu-product-muted); font-size: 1.1rem; }
.tsumu-product-next-step { display: flex; align-items: center; gap: 24px; margin-top: 34px; }
.tsumu-product-next-step > span:last-child { display: grid; gap: 4px; }
.tsumu-product-next-step strong { font-size: clamp(1.35rem, 2vw, 1.85rem); }
.tsumu-product-next-step small { display: flex; align-items: center; gap: 6px; color: var(--tsumu-product-muted); }
.tsumu-product-next-step small svg { width: 18px; height: 18px; }
.tsumu-product-kana-mark,
.tsumu-product-library-mark {
  display: grid;
  width: 68px;
  height: 68px;
  flex: 0 0 auto;
  place-items: center;
  border: 1px solid var(--tsumu-product-gold);
  border-radius: 50%;
  color: var(--tsumu-product-gold);
  font: 700 2rem/1 "Noto Sans JP", sans-serif;
}
.tsumu-product-hero-mascot { position: relative; display: grid; place-items: center; align-self: center; }
.tsumu-product-mascot { display: block; width: min(100%, 380px); height: auto; object-fit: contain; filter: drop-shadow(0 18px 20px rgba(0,0,0,.22)); }
.tsumu-product-speech { position: absolute; z-index: 2; top: 5%; right: 1%; padding: 14px 22px; border-radius: 999px; background: #f8fafc; color: #0f172a; font-weight: 800; }
.tsumu-product-speech::after { position: absolute; bottom: -11px; left: 18px; border: 12px solid transparent; border-top-color: #f8fafc; content: ""; transform: rotate(22deg); }
.tsumu-product-review-callout { display: grid; grid-column: 1 / -1; grid-template-columns: 32px minmax(0,1fr) auto; align-items: center; gap: 16px; padding: 20px 4px; border-top: 1px solid var(--tsumu-product-border); border-bottom: 1px solid var(--tsumu-product-border); }
.tsumu-product-review-callout > svg { color: var(--tsumu-product-gold); }
.tsumu-product-review-callout span:nth-child(2) { display: grid; }
.tsumu-product-review-callout small { color: var(--tsumu-product-muted); }
.tsumu-product-review-callout span:last-child { display: flex; align-items: center; gap: 8px; color: var(--tsumu-product-gold); font-weight: 800; }
.tsumu-product-mini-path { grid-column: 1 / -1; }
.tsumu-product-mini-path h2 { margin: 0 0 22px; font-size: 1.25rem; }
.tsumu-product-mini-path ol { display: grid; grid-template-columns: repeat(3, 1fr); margin: 0; padding: 0; list-style: none; }
.tsumu-product-mini-path li { position: relative; display: grid; justify-items: center; gap: 8px; text-align: center; }
.tsumu-product-mini-path li:not(:last-child)::after { position: absolute; z-index: 0; top: 22px; left: 60%; width: 80%; height: 2px; background: var(--tsumu-product-border); content: ""; }
.tsumu-product-mini-path li.is-done::after { background: var(--tsumu-product-mint); }
.tsumu-product-mini-path li > span { z-index: 1; display: grid; width: 46px; height: 46px; place-items: center; border: 3px solid var(--tsumu-product-border); border-radius: 50%; background: var(--tsumu-product-surface); }
.tsumu-product-mini-path li.is-done > span { border-color: #86efac; background: #3ca765; }
.tsumu-product-mini-path li.is-current > span { border-color: var(--tsumu-product-gold); }
.tsumu-product-mini-path li small { color: var(--tsumu-product-muted); }
.tsumu-product-progress-row { display: grid; grid-template-columns: auto minmax(180px,1fr) auto; align-items: center; gap: 18px; margin-top: 28px; padding: 16px 20px; border: 1px solid var(--tsumu-product-border); border-radius: 12px; color: var(--tsumu-product-muted); }
.tsumu-product-progress-row progress,
.tsumu-product-progress-summary progress,
.tsumu-product-session-header progress { width: 100%; height: 10px; border: 0; border-radius: 999px; overflow: hidden; accent-color: var(--tsumu-product-gold); }
progress::-webkit-progress-bar { background: #263247; }
progress::-webkit-progress-value { background: var(--tsumu-product-gold); border-radius: 999px; }
progress::-moz-progress-bar { background: var(--tsumu-product-gold); border-radius: 999px; }

.tsumu-product-path-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(280px, 360px); gap: 36px; }
.tsumu-product-progress-summary { display: grid; max-width: 620px; grid-template-columns: auto 1fr; align-items: center; gap: 14px; margin: 4px 0 28px; }
.tsumu-product-progress-summary progress { grid-column: 1 / -1; }
.tsumu-product-path-group { margin-bottom: 22px; }
.tsumu-product-path-group h2 { display: flex; align-items: center; gap: 16px; margin: 0; font-size: 1.25rem; }
.tsumu-product-path-group h2::after { height: 1px; flex: 1; background: var(--tsumu-product-border); content: ""; }
.tsumu-product-path-group ol { margin: 12px 0 0 38px; padding: 0; list-style: none; }
.tsumu-product-path-group li { position: relative; display: grid; min-height: 76px; grid-template-columns: 58px minmax(0,1fr); gap: 16px; }
.tsumu-product-path-group li:not(:last-child)::after { position: absolute; top: 42px; bottom: -1px; left: 23px; width: 2px; background: var(--tsumu-product-border); content: ""; }
.tsumu-product-path-node { z-index: 1; display: grid; width: 48px; height: 48px; place-items: center; border: 2px solid var(--tsumu-product-border); border-radius: 50%; background: var(--tsumu-product-bg); }
.tsumu-product-path-group li.is-done .tsumu-product-path-node { border-color: #86efac; background: #3ca765; }
.tsumu-product-path-group li.is-current .tsumu-product-path-node { border-color: var(--tsumu-product-gold); box-shadow: 0 0 18px rgba(255,194,51,.24); }
.tsumu-product-path-group li > div { display: grid; align-content: start; padding-top: 4px; }
.tsumu-product-path-group li strong { font-size: 1.12rem; }
.tsumu-product-path-group li small { color: var(--tsumu-product-muted); }
.tsumu-product-aside-card { position: sticky; top: 24px; align-self: start; padding: 28px; border: 1px solid var(--tsumu-product-border); border-radius: var(--tsumu-product-radius); background: linear-gradient(145deg, var(--tsumu-product-surface), #10223a); box-shadow: var(--tsumu-product-shadow); }
.tsumu-product-aside-card h2 { margin-top: 0; }
.tsumu-product-aside-card p { color: var(--tsumu-product-text-soft); }
.tsumu-product-aside-card .tsumu-product-mascot { margin: 22px auto -10px; }

.tsumu-product-library-tools { display: grid; max-width: 760px; gap: 18px; margin: 0 8px 20px; }
.tsumu-product-search { display: flex; min-height: 50px; align-items: center; gap: 12px; padding: 0 14px; border: 1px solid var(--tsumu-product-border); border-radius: 10px; background: rgba(22,32,51,.7); }
.tsumu-product-search input { width: 100%; min-width: 0; border: 0; outline: 0; background: transparent; color: var(--tsumu-product-text); }
.tsumu-product-search input::placeholder { color: var(--tsumu-product-muted); opacity: 1; }
.tsumu-product-tabs { display: flex; flex-wrap: wrap; gap: 8px; }
.tsumu-product-tabs button { min-height: 42px; padding: 8px 18px; border: 1px solid transparent; border-radius: 999px; background: transparent; color: var(--tsumu-product-text-soft); cursor: pointer; }
.tsumu-product-tabs button.is-active { border-color: var(--tsumu-product-gold); color: var(--tsumu-product-gold); }
.tsumu-product-library-layout { display: grid; grid-template-columns: minmax(360px, .9fr) minmax(400px, 1.1fr); gap: 22px; }
.tsumu-product-library-list,
.tsumu-product-library-detail { overflow: hidden; border: 1px solid var(--tsumu-product-border); border-radius: var(--tsumu-product-radius); background: rgba(22,32,51,.72); }
.tsumu-product-library-row { display: grid; min-height: 116px; grid-template-columns: 58px minmax(0,1fr) auto 24px; align-items: center; gap: 16px; padding: 18px; border-bottom: 1px solid var(--tsumu-product-border); }
.tsumu-product-library-row:last-child { border-bottom: 0; }
.tsumu-product-library-row.is-active { box-shadow: inset 3px 0 var(--tsumu-product-gold); background: rgba(255,194,51,.04); }
.tsumu-product-library-row > span:nth-child(2) { display: grid; }
.tsumu-product-library-row small { color: var(--tsumu-product-muted); }
.tsumu-product-library-mark { width: 52px; height: 52px; font-size: 1.35rem; }
.tsumu-product-library-detail { position: relative; padding: 28px; }
.tsumu-product-object-type { display: flex; align-items: center; gap: 12px; color: var(--tsumu-product-muted); }
.tsumu-product-library-detail h2 { margin: 24px 0; font: 700 clamp(2.1rem, 4vw, 3.5rem)/1.15 "Noto Sans JP", sans-serif; }
.tsumu-product-library-detail dl { max-width: 420px; margin: 0; }
.tsumu-product-library-detail dl > div { padding: 20px 0; border-top: 1px solid var(--tsumu-product-border); }
.tsumu-product-library-detail dt { margin-bottom: 8px; color: var(--tsumu-product-muted); }
.tsumu-product-library-detail dd { margin: 0; font-size: 1.2rem; }
.tsumu-product-library-detail dd p { color: var(--tsumu-product-text-soft); font-size: 1rem; }
.tsumu-product-library-detail .tsumu-product-mascot { position: absolute; right: 8px; bottom: 12px; width: 240px; opacity: .94; }
.tsumu-product-library-detail .tsumu-product-button-row { position: relative; z-index: 1; max-width: 300px; flex-direction: column; }

.tsumu-product-mode-focus { background: radial-gradient(circle at 50% 40%, #102843, var(--tsumu-product-bg) 68%); }
.tsumu-product-session-header { display: grid; min-height: 96px; grid-template-columns: 200px minmax(240px, 480px) 200px; align-items: center; justify-content: space-between; gap: 24px; padding: 16px 32px; border-bottom: 1px solid var(--tsumu-product-border); background: rgba(8,13,24,.72); }
.tsumu-product-session-header > div { display: grid; justify-items: center; gap: 8px; }
.tsumu-product-session-header > a:last-child { justify-self: end; color: var(--tsumu-product-muted); }
.tsumu-product-session-main { display: grid; width: min(100% - 40px, 940px); min-height: calc(100vh - 96px); grid-template-columns: minmax(0, 640px) 230px; align-content: center; gap: 42px; margin: 0 auto; padding: 28px 0 52px; }
.tsumu-product-exercise-card { padding: clamp(26px, 4vw, 46px); border: 1px solid var(--tsumu-product-border); border-radius: var(--tsumu-product-radius); background: linear-gradient(145deg, var(--tsumu-product-surface), #12263f); box-shadow: var(--tsumu-product-shadow); }
.tsumu-product-exercise-card h1 { margin: 0 0 28px; font-size: clamp(2rem, 4.3vw, 3.2rem); line-height: 1.15; }
.tsumu-product-exercise-card fieldset { display: grid; gap: 12px; margin: 0 0 28px; padding: 0; border: 0; }
.tsumu-product-exercise-card legend { margin-bottom: 14px; font-size: 1.15rem; font-weight: 800; }
.tsumu-product-answer { display: flex; min-height: 84px; align-items: center; gap: 20px; padding: 14px 22px; border: 1px solid var(--tsumu-product-border); border-radius: 12px; background: rgba(255,255,255,.02); cursor: pointer; }
.tsumu-product-answer:has(input:checked) { border-color: var(--tsumu-product-gold); background: rgba(255,194,51,.05); }
.tsumu-product-answer input { width: 24px; height: 24px; accent-color: var(--tsumu-product-gold); }
.tsumu-product-answer span { font: 600 2.7rem/1 "Noto Sans JP", sans-serif; }
.tsumu-product-exercise-card > .tsumu-product-button { min-width: 280px; }
.tsumu-product-exercise-card > .tsumu-product-text-link { display: flex; width: max-content; margin-top: 16px; }
.tsumu-product-session-mascot { position: relative; align-self: center; }
.tsumu-product-session-mascot .tsumu-product-speech { top: -40px; right: 0; }
.tsumu-product-session-note { grid-column: 1 / -1; display: flex; align-items: center; justify-content: center; gap: 8px; margin: 0; color: var(--tsumu-product-muted); font-size: .9rem; }
.tsumu-product-session-note svg { width: 18px; height: 18px; }

.tsumu-product-state-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 24px; }
.tsumu-product-state-card,
.tsumu-product-component-samples,
.tsumu-product-panel { padding: 28px; border: 1px solid var(--tsumu-product-border); border-radius: var(--tsumu-product-radius); background: rgba(22,32,51,.78); }
.tsumu-product-state-card { display: grid; align-content: start; gap: 16px; }
.tsumu-product-state-icon { display: grid; width: 56px; height: 56px; place-items: center; border-radius: 50%; background: rgba(255,194,51,.1); color: var(--tsumu-product-gold); }
.tsumu-product-state-icon svg { width: 26px; height: 26px; }
.tsumu-product-state-copy h2 { margin: 0; font-size: 1.15rem; }
.tsumu-product-state-card p { color: var(--tsumu-product-muted); }
.tsumu-product-state-copy p { margin: 5px 0 0; }
.tsumu-product-state-card.is-error { border-left: 4px solid var(--tsumu-product-coral); }
.tsumu-product-state-card.is-error .tsumu-product-state-icon { background: rgba(255,124,101,.12); color: var(--tsumu-product-coral); }
.tsumu-product-state-card.is-locked { border-left: 4px solid var(--tsumu-product-muted); }
.tsumu-product-state-card.is-success { border-left: 4px solid var(--tsumu-product-mint); }
.tsumu-product-state-card.is-success .tsumu-product-state-icon { background: rgba(134,239,172,.1); color: var(--tsumu-product-mint); }
.tsumu-product-state-card.is-compact { grid-template-columns: 42px minmax(0,1fr) auto; align-items: center; gap: 12px; padding: 14px 16px; border-radius: 10px; }
.tsumu-product-state-card.is-compact .tsumu-product-state-icon { width: 42px; height: 42px; }
.tsumu-product-state-card.is-compact .tsumu-product-state-icon svg { width: 21px; height: 21px; }
.tsumu-product-state-card.is-compact .tsumu-product-button { min-height: 40px; }
.tsumu-product-component-samples { display: grid; align-content: start; gap: 16px; }
.tsumu-product-component-samples h2 { margin: 0; }
.tsumu-product-skeleton { display: grid; gap: 10px; }
.tsumu-product-skeleton span { height: 14px; border-radius: 999px; background: #263247; }
.tsumu-product-skeleton span:nth-child(2) { width: 72%; }
.tsumu-product-skeleton span:nth-child(3) { width: 48%; }

.tsumu-product-studio-shell { grid-template-columns: 230px minmax(0,1fr); }
.tsumu-product-studio-sidebar { padding-inline: 12px; }
.tsumu-product-studio-sidebar .tsumu-product-brand { padding-left: 12px; }
.tsumu-product-studio-sidebar nav { gap: 4px; margin-top: 42px; }
.tsumu-product-studio-nav-link { min-height: 48px; padding: 10px 14px; gap: 12px; }
.tsumu-product-studio-nav-link svg { width: 21px; height: 21px; }
.tsumu-product-studio-grid { display: grid; grid-template-columns: minmax(0,1fr) 245px; gap: 26px; }
.tsumu-product-filter-bar { display: grid; grid-template-columns: minmax(220px,1.5fr) minmax(150px,.7fr) minmax(150px,.8fr); gap: 18px; margin-bottom: 22px; padding: 18px; border: 1px solid var(--tsumu-product-border); border-radius: 12px; background: rgba(22,32,51,.55); }
.tsumu-product-filter-bar select { min-height: 50px; padding: 0 14px; border: 1px solid var(--tsumu-product-border); border-radius: 10px; background: #111c2f; color: var(--tsumu-product-text); }
.tsumu-product-table-wrap { overflow-x: auto; border: 1px solid var(--tsumu-product-border); border-radius: 12px; }
.tsumu-product-table-wrap table { width: 100%; min-width: 800px; border-collapse: collapse; }
.tsumu-product-table-wrap th,
.tsumu-product-table-wrap td { padding: 20px 18px; border-bottom: 1px solid var(--tsumu-product-border); text-align: left; vertical-align: middle; }
.tsumu-product-table-wrap thead th { color: var(--tsumu-product-text-soft); font-size: .88rem; }
.tsumu-product-table-wrap tbody tr:last-child > * { border-bottom: 0; }
.tsumu-product-table-wrap tbody tr:first-child { background: rgba(255,194,51,.035); box-shadow: inset 3px 0 var(--tsumu-product-gold); }
.tsumu-product-table-wrap a { display: inline-flex; align-items: center; gap: 6px; color: var(--tsumu-product-gold); font-weight: 700; }
.tsumu-product-table-wrap a svg { width: 18px; height: 18px; }
.tsumu-product-task-card { align-self: stretch; padding: 22px; border: 1px solid var(--tsumu-product-border); border-radius: 12px; background: rgba(22,32,51,.62); }
.tsumu-product-task-card h2 { margin: 0 0 18px; font-size: 1.08rem; }
.tsumu-product-task-card a { display: grid; grid-template-columns: 24px 1fr 18px; align-items: center; gap: 10px; padding: 18px 0; border-top: 1px solid var(--tsumu-product-border); }
.tsumu-product-task-card a > svg:last-child { width: 18px; }
.tsumu-product-metric-grid,
.tsumu-product-card-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 18px; margin-bottom: 24px; }
.tsumu-product-metric-grid a,
.tsumu-product-metric-grid > div,
.tsumu-product-card-grid a { display: grid; min-width: 0; min-height: 150px; align-content: start; gap: 8px; padding: 24px; overflow-wrap: anywhere; border: 1px solid var(--tsumu-product-border); border-radius: 14px; background: rgba(22,32,51,.72); }
.tsumu-product-metric-grid a:hover,
.tsumu-product-card-grid a:hover { border-color: var(--tsumu-product-gold); }
.tsumu-product-metric-grid strong { font-size: 1.8rem; }
.tsumu-product-metric-grid small,
.tsumu-product-card-grid small { color: var(--tsumu-product-muted); }
.tsumu-product-card-grid svg { margin-bottom: 8px; color: var(--tsumu-product-gold); }
.tsumu-product-panel { margin-bottom: 24px; }
.tsumu-product-panel-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; }
.tsumu-product-panel-heading h2 { margin: 10px 0 0; }
.tsumu-product-definition-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 0 24px; margin: 24px 0 0; }
.tsumu-product-definition-grid div { padding: 16px 0; border-top: 1px solid var(--tsumu-product-border); }
.tsumu-product-definition-grid dt { color: var(--tsumu-product-muted); }
.tsumu-product-definition-grid dd { margin: 4px 0 0; }

.tsumu-product-duration-options { display: flex; flex-wrap: wrap; gap: 12px; }
.tsumu-product-live-path { display: grid; gap: 14px; margin: 0; padding: 0; list-style: none; }
.tsumu-product-live-path li { display: grid; grid-template-columns: 52px minmax(0,1fr); gap: 18px; padding: 22px; border: 1px solid var(--tsumu-product-border); border-radius: 14px; background: rgba(22,32,51,.72); }
.tsumu-product-live-path li > span { display: grid; width: 48px; height: 48px; place-items: center; border: 1px solid var(--tsumu-product-border); border-radius: 50%; font-weight: 800; }
.tsumu-product-live-path li.is-completed > span { border-color: var(--tsumu-product-mint); color: var(--tsumu-product-mint); }
.tsumu-product-live-path h2 { margin: 4px 0; font-size: 1.2rem; }
.tsumu-product-live-path p { margin: 0; color: var(--tsumu-product-muted); }
.tsumu-product-live-list { display: grid; }
.tsumu-product-live-list article { display: grid; min-height: 76px; grid-template-columns: auto minmax(0,1fr) auto; align-items: center; gap: 16px; padding: 14px 0; border-top: 1px solid var(--tsumu-product-border); }
.tsumu-product-live-list article > div { display: grid; }
.tsumu-product-live-list small,
.tsumu-product-live-list time { color: var(--tsumu-product-muted); }
.tsumu-product-form { display: grid; gap: 22px; max-width: 820px; }
.tsumu-product-form > label { display: grid; gap: 7px; }
.tsumu-product-form :where(input,select,textarea) { min-height: 48px; padding: 10px 12px; border: 1px solid var(--tsumu-product-border); border-radius: 10px; background: #111c2f; color: var(--tsumu-product-text); }
.tsumu-product-form textarea { min-height: 112px; resize: vertical; }
.tsumu-product-form fieldset { display: flex; flex-wrap: wrap; gap: 12px 22px; padding: 18px; border: 1px solid var(--tsumu-product-border); border-radius: 12px; }
.tsumu-product-form fieldset label { display: flex; align-items: center; gap: 7px; }
.tsumu-product-form fieldset input { min-height: 0; }
.tsumu-product-library-detail.is-standalone { min-height: 420px; }
.tsumu-product-prompt { padding: 18px; border-radius: 12px; background: rgba(255,255,255,.04); font: 700 1.8rem/1.4 "Noto Sans JP",sans-serif; }
.tsumu-product-exercise-card form[data-product-exercise] { display: grid; gap: 18px; }
.tsumu-product-text-answer { display: grid; gap: 8px; }
.tsumu-product-text-answer input,
.tsumu-product-matching select { min-height: 52px; padding: 10px 14px; border: 1px solid var(--tsumu-product-border); border-radius: 10px; background: #0e1a2d; color: var(--tsumu-product-text); }
.tsumu-product-matching { display: grid; gap: 12px; }
.tsumu-product-matching label { display: grid; grid-template-columns: minmax(100px,.7fr) minmax(180px,1fr); align-items: center; gap: 16px; }
.tsumu-product-blocks { display: flex; flex-wrap: wrap; gap: 10px; }
.tsumu-product-blocks > span { display: grid; grid-template-columns: auto 36px 36px; align-items: center; overflow: hidden; border: 1px solid var(--tsumu-product-border); border-radius: 10px; background: #0e1a2d; }
.tsumu-product-blocks b { padding: 10px 12px; font: 700 1.2rem/1 "Noto Sans JP",sans-serif; }
.tsumu-product-blocks button { min-width: 36px; min-height: 44px; border: 0; border-left: 1px solid var(--tsumu-product-border); background: transparent; color: var(--tsumu-product-text); cursor: pointer; }
.tsumu-product-why { margin-bottom: 18px; padding: 14px; border: 1px solid var(--tsumu-product-border); border-radius: 10px; }
.tsumu-product-help { margin-top: 14px; }

@media (max-width: 1100px) {
  .tsumu-product-hero-card { grid-template-columns: minmax(0,1fr) 310px; gap: 12px 22px; padding: 32px; }
  .tsumu-product-hero-copy { padding-left: 0; }
  .tsumu-product-library-layout { grid-template-columns: minmax(330px,.9fr) minmax(360px,1.1fr); }
  .tsumu-product-library-detail .tsumu-product-mascot { width: 190px; opacity: .7; }
  .tsumu-product-studio-grid { grid-template-columns: 1fr; }
  .tsumu-product-task-card { display: grid; grid-template-columns: repeat(3,1fr); gap: 12px; }
  .tsumu-product-task-card h2 { grid-column: 1 / -1; }
}

.tsumu-course-editor { display: grid; gap: 22px; margin-top: 22px; }
.tsumu-course-form-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 16px; }
.tsumu-course-form-grid label,
.tsumu-course-phase-editor label { display: grid; align-content: start; gap: 7px; color: var(--tsumu-product-muted); font-size: .86rem; font-weight: 800; }
.tsumu-course-form-grid .is-wide { grid-column: 1 / -1; }
.tsumu-course-editor input,
.tsumu-course-editor textarea,
.tsumu-course-editor select { width: 100%; min-width: 0; padding: 11px 12px; border: 1px solid var(--tsumu-product-border); border-radius: 9px; background: var(--tsumu-product-surface-2); color: var(--tsumu-product-text); font: inherit; }
.tsumu-course-editor textarea { min-height: 92px; resize: vertical; }
.tsumu-course-editor select[multiple] { min-height: 180px; }
.tsumu-course-phase-editor { display: grid; grid-template-columns: minmax(140px,.6fr) minmax(180px,1fr) minmax(220px,1.5fr); gap: 14px; padding: 18px; border: 1px solid var(--tsumu-product-border); border-radius: 12px; }
.tsumu-course-phase-editor label:last-child { grid-column: 1 / -1; }
.tsumu-course-phase { margin-top: 20px; padding: 18px; border: 1px solid var(--tsumu-product-border); border-radius: 12px; background: var(--tsumu-product-surface-2); }
.tsumu-course-phase ol { display: grid; gap: 8px; margin: 14px 0 0; padding-left: 22px; }
.tsumu-course-phase li small { color: var(--tsumu-product-muted); }
.tsumu-product-panel > summary { min-height: 44px; cursor: pointer; font-weight: 900; }

@media (max-width: 820px) {
  .tsumu-product-shell,
  .tsumu-product-studio-shell { display: block; }
  .tsumu-product-sidebar,
  .tsumu-product-studio-sidebar { display: none; }
  .tsumu-product-main,
  .tsumu-product-studio-main { padding: 18px 18px calc(94px + env(safe-area-inset-bottom)); }
  .tsumu-product-mobile-header,
  .tsumu-product-studio-mobile-header { position: sticky; z-index: 20; top: 0; display: flex; min-height: 68px; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 16px; border-bottom: 1px solid var(--tsumu-product-border); background: rgba(8,13,24,.93); backdrop-filter: blur(16px); }
  .tsumu-product-mobile-header .tsumu-product-brand .tsumu-original-logo { width: 108px; height: 42px; }
  .tsumu-product-mobile-header > strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .tsumu-product-bottom-nav { position: fixed; z-index: 30; right: 0; bottom: 0; left: 0; display: grid; grid-template-columns: repeat(5,minmax(0,1fr)); padding: 8px 4px calc(8px + env(safe-area-inset-bottom)); border-top: 1px solid var(--tsumu-product-border); background: rgba(8,13,24,.96); backdrop-filter: blur(18px); }
  .tsumu-product-bottom-nav .tsumu-product-nav-link { min-height: 54px; flex-direction: column; justify-content: center; gap: 2px; padding: 4px 1px; border-radius: 9px; font-size: clamp(.62rem, 2.5vw, .76rem); }
  .tsumu-product-bottom-nav .tsumu-product-nav-link.is-active { box-shadow: inset 0 2px var(--tsumu-product-gold); }
  .tsumu-product-bottom-nav svg { width: 22px; height: 22px; }
  .tsumu-product-hero-card { min-height: auto; grid-template-columns: 1fr; padding: 26px 22px; border-radius: 18px; }
  .tsumu-product-hero-copy { display: contents; }
  .tsumu-product-kicker-row { order: -5; margin: 0; }
  .tsumu-product-overline { order: -4; margin: 0; }
  .tsumu-product-hero-copy h1 { order: -3; font-size: clamp(2rem, 9vw, 3.2rem); }
  .tsumu-product-lead { order: -2; }
  .tsumu-product-hero-mascot { order: -1; }
  .tsumu-product-hero-mascot .tsumu-product-mascot { width: min(78vw, 300px); }
  .tsumu-product-next-step { margin-top: 8px; }
  .tsumu-product-review-callout { grid-template-columns: 28px minmax(0,1fr); }
  .tsumu-product-review-callout span:last-child { grid-column: 2; }
  .tsumu-product-mini-path ol { grid-template-columns: 1fr; gap: 18px; }
  .tsumu-product-mini-path li { grid-template-columns: 48px 1fr; justify-items: start; text-align: left; }
  .tsumu-product-mini-path li:not(:last-child)::after { top: 46px; bottom: -18px; left: 22px; width: 2px; height: auto; }
  .tsumu-product-progress-row { grid-template-columns: 1fr auto; }
  .tsumu-product-progress-row progress { grid-column: 1 / -1; grid-row: 2; }
  .tsumu-product-path-layout { grid-template-columns: 1fr; }
  .tsumu-product-aside-card { position: static; }
  .tsumu-product-aside-card .tsumu-product-mascot { width: min(80%, 300px); }
  .tsumu-product-library-layout { grid-template-columns: 1fr; }
  .tsumu-product-library-detail { display: none; }
  .tsumu-product-library-row { grid-template-columns: 52px minmax(0,1fr) 22px; }
  .tsumu-product-library-row > small { display: none; }
  .tsumu-product-page-header { padding-inline: 0; }
  .tsumu-product-page-actions .tsumu-product-button { display: none; }
  .tsumu-product-state-grid,
  .tsumu-product-metric-grid,
  .tsumu-product-card-grid { grid-template-columns: 1fr; }
  .tsumu-product-state-card.is-compact { grid-template-columns: 42px minmax(0,1fr); }
  .tsumu-product-state-card.is-compact .tsumu-product-button { grid-column: 1 / -1; width: 100%; }
  .tsumu-product-session-header { min-height: 78px; grid-template-columns: 72px minmax(132px,1fr) 44px; gap: 8px; padding: 10px 14px; }
  .tsumu-product-session-header .tsumu-product-brand .tsumu-original-logo { width: 72px; height: 44px; }
  .tsumu-product-session-header .tsumu-product-brand img { object-position: left; }
  .tsumu-product-session-header > a:last-child { width: 44px; overflow: hidden; color: transparent; }
  .tsumu-product-session-header > a:last-child::after { display: grid; width: 44px; height: 44px; place-items: center; color: var(--tsumu-product-text); content: "×"; font-size: 2rem; }
  .tsumu-product-session-main { width: min(100% - 28px, 620px); min-height: calc(100vh - 78px); grid-template-columns: 1fr; align-content: start; gap: 24px; padding: 24px 0 36px; }
  .tsumu-product-session-mascot { display: flex; min-height: 116px; align-items: center; justify-content: center; gap: 18px; order: -1; }
  .tsumu-product-session-mascot .tsumu-product-mascot { width: 96px; }
  .tsumu-product-session-mascot .tsumu-product-speech { position: relative; top: auto; right: auto; order: 2; }
  .tsumu-product-session-note { grid-column: 1; text-align: center; }
  .tsumu-product-exercise-card > .tsumu-product-button { width: 100%; min-width: 0; }
  .tsumu-product-studio-mobile-header { align-items: flex-start; }
  .tsumu-product-studio-mobile-header .tsumu-product-brand .tsumu-original-logo { width: 112px; height: 44px; }
  .tsumu-product-studio-mobile-header details { position: relative; margin-left: auto; }
  .tsumu-product-studio-mobile-header summary { display: flex; min-height: 44px; align-items: center; gap: 6px; padding: 8px 10px; border: 1px solid var(--tsumu-product-border); border-radius: 10px; list-style: none; cursor: pointer; }
  .tsumu-product-studio-mobile-header summary::-webkit-details-marker { display: none; }
  .tsumu-product-studio-mobile-header details nav { position: absolute; top: calc(100% + 8px); right: 0; display: grid; width: min(86vw, 330px); max-height: calc(100vh - 90px); gap: 4px; padding: 10px; overflow: auto; border: 1px solid var(--tsumu-product-border); border-radius: 12px; background: #0d1728; box-shadow: var(--tsumu-product-shadow); }
  .tsumu-product-studio-grid { display: block; }
  .tsumu-product-filter-bar { grid-template-columns: 1fr; }
  .tsumu-product-mode-studio .tsumu-product-page-header { align-items: stretch; flex-direction: column; }
  .tsumu-product-mode-studio .tsumu-product-page-actions { justify-content: space-between; }
  .tsumu-product-mode-studio .tsumu-product-page-actions .tsumu-product-button { display: inline-flex; flex: 1; }
  .tsumu-product-mode-studio .tsumu-product-page-actions button:disabled { opacity: .86; }
  .tsumu-product-table-wrap { overflow: visible; border: 0; }
  .tsumu-product-table-wrap table,
  .tsumu-product-table-wrap tbody { display: block; min-width: 0; }
  .tsumu-product-table-wrap thead { display: none; }
  .tsumu-product-table-wrap tbody { overflow: hidden; border: 1px solid var(--tsumu-product-border); border-radius: 12px; }
  .tsumu-product-table-wrap tbody tr { display: grid; min-height: 138px; grid-template-columns: minmax(0,1fr) minmax(110px,.75fr); align-content: center; gap: 8px 14px; padding: 18px; border-bottom: 1px solid var(--tsumu-product-border); }
  .tsumu-product-table-wrap tbody tr:last-child { border-bottom: 0; }
  .tsumu-product-table-wrap th,
  .tsumu-product-table-wrap td { display: block; padding: 0; border: 0; }
  .tsumu-product-table-wrap tbody th { grid-column: 1; grid-row: 1; }
  .tsumu-product-table-wrap tbody td:nth-child(2),
  .tsumu-product-table-wrap tbody td:nth-child(5) { display: none; }
  .tsumu-product-table-wrap tbody td:nth-child(3) { grid-column: 1; grid-row: 2; color: var(--tsumu-product-muted); }
  .tsumu-product-table-wrap tbody td:nth-child(4) { grid-column: 1; grid-row: 3; }
  .tsumu-product-table-wrap tbody td:nth-child(6) { grid-column: 2; grid-row: 1 / 4; align-self: center; justify-self: end; text-align: right; }
  .tsumu-product-table-wrap tbody tr:first-child { box-shadow: inset 3px 0 var(--tsumu-product-gold); }
  .tsumu-product-task-card { display: block; margin-top: 22px; }
  .tsumu-product-definition-grid { grid-template-columns: 1fr; }
  .tsumu-course-form-grid,
  .tsumu-course-phase-editor { grid-template-columns: 1fr; }
  .tsumu-course-form-grid .is-wide,
  .tsumu-course-phase-editor label:last-child { grid-column: auto; }
}

@media (max-width: 520px) {
  .tsumu-product-main,
  .tsumu-product-studio-main { padding-inline: 12px; }
  .tsumu-product-mobile-header { padding-inline: 12px; }
  .tsumu-product-mobile-header > strong { display: none; }
  .tsumu-product-hero-card { padding: 22px 18px; }
  .tsumu-product-next-step { align-items: flex-start; gap: 14px; }
  .tsumu-product-kana-mark { width: 56px; height: 56px; }
  .tsumu-product-button-row { flex-direction: column; }
  .tsumu-product-button-row .tsumu-product-button { width: 100%; }
  .tsumu-product-path-group ol { margin-left: 4px; }
  .tsumu-product-page-header { flex-direction: column; }
  .tsumu-product-page-header h1 { font-size: 2rem; }
  .tsumu-product-library-row { min-height: 100px; gap: 12px; padding: 14px 12px; }
  .tsumu-product-tabs { flex-wrap: nowrap; overflow-x: auto; padding-bottom: 4px; }
  .tsumu-product-tabs button { flex: 0 0 auto; }
  .tsumu-product-exercise-card { padding: 22px 18px; }
  .tsumu-product-exercise-card h1 { font-size: 1.82rem; }
  .tsumu-product-answer { min-height: 72px; }
  .tsumu-product-answer span { font-size: 2.25rem; }
  .tsumu-product-matching label { grid-template-columns: minmax(0,1fr); gap: 7px; }
  .tsumu-product-matching select { width: 100%; min-width: 0; max-width: 100%; }
  .tsumu-product-panel-heading { display: grid; }
}

.tsumu-course-catalog { display: grid; gap: 22px; }
.tsumu-course-card { display: grid; grid-template-columns: 190px minmax(0,1fr); overflow: hidden; border: 1px solid var(--tsumu-product-border); border-radius: 18px; background: var(--tsumu-product-surface); box-shadow: var(--tsumu-product-shadow); }
.tsumu-course-cover { display: grid; min-height: 260px; place-items: center; background: radial-gradient(circle at 50% 35%, rgba(216,174,89,.25), transparent 58%), #101c30; }
.tsumu-course-cover .tsumu-mascot, .tsumu-course-hero-mascot .tsumu-mascot { width: min(150px,80%); }
.tsumu-course-card-body { padding: 26px; }
.tsumu-course-card-progress { height: 7px; margin: 20px 0; overflow: hidden; border-radius: 999px; background: rgba(255,255,255,.08); }
.tsumu-course-card-progress span { display: block; height: 100%; border-radius: inherit; background: var(--tsumu-product-gold); }
.tsumu-course-hero, .tsumu-lesson-hero-new { display: grid; grid-template-columns: minmax(0,1fr) 210px; gap: 32px; padding: 32px; border: 1px solid var(--tsumu-product-border); border-radius: 20px; background: linear-gradient(135deg,#14223a,#10192b); }
.tsumu-course-hero h1, .tsumu-lesson-hero-new h1 { margin: 5px 0 12px; font-size: clamp(2rem,4vw,3.4rem); }
.tsumu-course-hero-meta { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0; }
.tsumu-course-hero-meta span { padding: 7px 11px; border-radius: 999px; background: rgba(255,255,255,.07); color: var(--tsumu-product-muted); }
.tsumu-course-phases { display: grid; gap: 22px; margin-top: 24px; }
.tsumu-course-phase-band { overflow: hidden; border: 1px solid var(--tsumu-product-border); border-radius: 18px; background: var(--tsumu-product-surface); }
.tsumu-course-phase-band > header { display: flex; gap: 16px; padding: 22px 24px; background: rgba(216,174,89,.08); }
.tsumu-course-phase-band > header > span { display: grid; width: 38px; height: 38px; place-items: center; border-radius: 50%; background: var(--tsumu-product-gold); color: #10151f; font-weight: 800; }
.tsumu-course-phase-band h2, .tsumu-course-phase-band p { margin: 0; }
.tsumu-lesson-list { margin: 0; padding: 0; list-style: none; }
.tsumu-lesson-list li { display: grid; grid-template-columns: 42px minmax(0,1fr) auto auto; align-items: center; gap: 16px; padding: 20px 24px; border-top: 1px solid var(--tsumu-product-border); }
.tsumu-lesson-list h3, .tsumu-lesson-list p { margin: 0 0 5px; }
.tsumu-lesson-state { display: grid; width: 38px; height: 38px; place-items: center; border-radius: 50%; background: rgba(255,255,255,.07); }
.tsumu-product-breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; color: var(--tsumu-product-muted); }
.tsumu-lesson-hero-new dl { display: flex; flex-wrap: wrap; gap: 12px; }
.tsumu-lesson-hero-new dl div { min-width: 130px; }
.tsumu-lesson-hero-new dt { color: var(--tsumu-product-muted); font-size: .78rem; text-transform: uppercase; }
.tsumu-lesson-hero-new dd { margin: 3px 0 0; font-weight: 700; }
.tsumu-lesson-start, .tsumu-product-course-context { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-top: 18px; padding: 18px 22px; border: 1px solid var(--tsumu-product-border); border-radius: 14px; background: var(--tsumu-product-surface); }
.tsumu-product-course-context { margin-bottom: 22px; }
.tsumu-product-course-context h2, .tsumu-product-course-context p { margin: 3px 0; }
.tsumu-product-course-context progress { width: min(220px,25vw); }
.tsumu-lesson-player-grid { display: grid; grid-template-columns: minmax(0,1fr) 280px; gap: 24px; margin-top: 24px; }
.tsumu-lesson-content { display: grid; gap: 16px; }
.tsumu-lesson-block, .tsumu-lesson-vocabulary, .tsumu-lesson-practice, .tsumu-lesson-side { padding: 24px; border: 1px solid var(--tsumu-product-border); border-radius: 16px; background: var(--tsumu-product-surface); }
.tsumu-lesson-block .is-japanese { font-size: clamp(1.45rem,3vw,2.15rem); line-height: 1.7; }
.tsumu-lesson-vocabulary > div { display: grid; grid-template-columns: repeat(auto-fit,minmax(160px,1fr)); gap: 12px; }
.tsumu-lesson-vocabulary article { display: grid; gap: 4px; padding: 16px; border-radius: 12px; background: rgba(255,255,255,.045); }
.tsumu-lesson-vocabulary strong { font-size: 1.65rem; }
.tsumu-lesson-vocabulary em { color: var(--tsumu-product-gold); font-size: .8rem; }
.tsumu-lesson-practice ol { display: grid; gap: 10px; padding: 0; list-style: none; counter-reset: practice; }
.tsumu-lesson-practice li { display: flex; gap: 14px; padding: 14px; border-radius: 12px; background: rgba(255,255,255,.045); counter-increment: practice; }
.tsumu-lesson-practice li > span { color: var(--tsumu-product-gold); }
.tsumu-lesson-side { position: sticky; top: 24px; height: fit-content; }
.tsumu-lesson-side .tsumu-product-button { width: 100%; margin-top: 9px; }
.tsumu-studio-check-grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(240px,1fr)); gap: 9px; max-height: 330px; margin-bottom: 24px; padding: 10px; overflow: auto; border: 1px solid var(--tsumu-product-border); border-radius: 12px; }
.tsumu-studio-check-grid label { display: flex; min-height: 62px; align-items: flex-start; gap: 10px; padding: 11px; border-radius: 9px; background: rgba(255,255,255,.035); }
.tsumu-studio-check-grid small { display: block; color: var(--tsumu-product-muted); }
.tsumu-lesson-media { display: block; width: min(100%,720px); max-height: 520px; margin-top: 16px; border-radius: 14px; object-fit: contain; background: #08101d; }
.tsumu-lesson-block audio { width: min(100%,680px); margin-top: 16px; }
.tsumu-lesson-lock-reason { display: block; margin-top: 7px; color: #e9bc72; }
.tsumu-course-checkpoint { background: linear-gradient(90deg,rgba(216,174,89,.08),transparent); }
.tsumu-lesson-completion { align-self: center; }
.tsumu-lesson-completion-objects { display: flex; flex-wrap: wrap; gap: 9px; margin: 12px 0 22px; }
.tsumu-lesson-completion-objects span { padding: 9px 12px; border: 1px solid var(--tsumu-product-border); border-radius: 999px; background: rgba(255,255,255,.04); }
.tsumu-lesson-completion-objects strong { margin-right: 6px; font-family: "Noto Sans JP",sans-serif; font-size: 1.2rem; }
.tsumu-lesson-preview-flow { display: grid; gap: 14px; margin-top: 20px; }
.tsumu-lesson-block-editor { margin: 12px 0; padding: 16px; border: 1px solid var(--tsumu-product-border); border-radius: 12px; }
.tsumu-product-inline-review { display: flex; flex-wrap: wrap; gap: 9px; align-items: center; }
.tsumu-product-inline-review input { min-width: min(280px,100%); flex: 1; }

/* Integrated account and operations surfaces: same tokens, spacing and shell. */
.tsumu-product-account-page, .tsumu-account-pro-page, .tsumu-admin-content { display: grid; gap: 20px; }
.tsumu-account-tabs, .tsumu-auth-switch, .tsumu-account-pro-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.tsumu-account-tabs a, .tsumu-auth-switch a { padding: 10px 14px; border: 1px solid var(--tsumu-product-border); border-radius: 10px; }
.tsumu-account-tabs a.is-active { border-color: var(--tsumu-product-gold); color: var(--tsumu-product-gold); }
.tsumu-account-summary, .tsumu-provider-settings, .tsumu-session-list, .tsumu-product-account-page details,
.tsumu-account-pro-hero, .tsumu-card, .tsumu-admin-entity-hero, .tsumu-admin-user-boundary,
.tsumu-admin-user-metrics article { padding: 22px; border: 1px solid var(--tsumu-product-border); border-radius: 16px; background: var(--tsumu-product-surface); }
.tsumu-account-summary { display: flex; justify-content: space-between; gap: 12px; }
.tsumu-provider-settings article, .tsumu-session-list article, .tsumu-account-pro-sources article { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 14px 0; border-top: 1px solid var(--tsumu-product-border); }
.tsumu-product-account-page form, .tsumu-admin-form, .tsumu-settings-form { display: grid; gap: 12px; }
.tsumu-product-account-page label, .tsumu-admin-form label { display: grid; gap: 6px; }
.tsumu-product-account-page input, .tsumu-product-account-page select, .tsumu-product-account-page textarea,
.tsumu-admin-content input, .tsumu-admin-content select, .tsumu-admin-content textarea { width: 100%; padding: 11px 12px; border: 1px solid var(--tsumu-product-border); border-radius: 9px; background: rgba(5,11,20,.65); color: var(--tsumu-product-text); }
.tsumu-product-account-page button, .tsumu-admin-content .tsumu-button { width: fit-content; min-height: 42px; padding: 10px 15px; border: 1px solid var(--tsumu-product-border); border-radius: 9px; background: rgba(255,255,255,.06); color: var(--tsumu-product-text); font-weight: 700; cursor: pointer; }
.tsumu-account-pro-hero { display: flex; align-items: flex-start; justify-content: space-between; }
.tsumu-account-pro-grid, .tsumu-admin-user-detail-grid { display: grid; grid-template-columns: minmax(0,1.25fr) minmax(260px,.75fr); gap: 20px; }
.tsumu-account-pro-summary, .tsumu-admin-user-main, .tsumu-admin-user-side { display: grid; gap: 18px; }
.tsumu-account-pro-state, .tsumu-status-badge, .tsumu-card-label { display: inline-flex; width: fit-content; padding: 5px 9px; border-radius: 999px; background: rgba(216,174,89,.13); color: var(--tsumu-product-gold); font-size: .8rem; }
.tsumu-admin-workspace { min-width: 0; }
.tsumu-admin-entity-hero h1 { margin: 5px 0; }
.tsumu-admin-breadcrumb { display: flex; gap: 7px; color: var(--tsumu-product-muted); }
.tsumu-admin-user-metrics { display: grid; grid-template-columns: repeat(auto-fit,minmax(170px,1fr)); gap: 12px; }
.tsumu-admin-user-metrics article { display: grid; gap: 4px; }
.tsumu-admin-user-metrics strong { font-size: 1.75rem; }
.tsumu-admin-filters { display: flex; gap: 10px; }
.tsumu-admin-filters label { flex: 1; }
.tsumu-admin-user-list > a { display: grid; grid-template-columns: 42px minmax(180px,1.3fr) minmax(160px,1fr) minmax(150px,1fr) 24px; align-items: center; gap: 14px; padding: 16px 0; border-top: 1px solid var(--tsumu-product-border); }
.tsumu-admin-user-list span, .tsumu-readonly-grid label { display: grid; gap: 3px; }
.tsumu-readonly-grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(180px,1fr)); gap: 10px; }
.tsumu-readonly-grid label { padding: 12px; border-radius: 10px; background: rgba(255,255,255,.035); }
.tsumu-notice { padding: 14px; border: 1px solid var(--tsumu-product-border); border-radius: 10px; background: rgba(255,255,255,.04); }
.tsumu-notice.is-error { border-color: #9f5555; }
.tsumu-notice.is-success { border-color: #4e8f72; }

@media (max-width: 820px) {
  .tsumu-account-pro-grid, .tsumu-admin-user-detail-grid { grid-template-columns: 1fr; }
  .tsumu-admin-user-list > a { grid-template-columns: 42px 1fr 24px; }
  .tsumu-admin-user-list > a > span:nth-of-type(n+3) { display: none; }
  .tsumu-provider-settings article, .tsumu-session-list article, .tsumu-account-pro-hero { align-items: stretch; flex-direction: column; }
}

@media (max-width: 820px) {
  .tsumu-course-card, .tsumu-course-hero, .tsumu-lesson-hero-new, .tsumu-lesson-player-grid { grid-template-columns: 1fr; }
  .tsumu-course-cover { min-height: 170px; }
  .tsumu-lesson-list li { grid-template-columns: 40px minmax(0,1fr); }
  .tsumu-lesson-list .tsumu-product-status, .tsumu-lesson-list .tsumu-product-button { grid-column: 2; justify-self: start; }
  .tsumu-lesson-side { position: static; }
  .tsumu-lesson-start, .tsumu-product-course-context { align-items: stretch; flex-direction: column; }
  .tsumu-product-course-context progress { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  .tsumu-product-body *,
  .tsumu-product-body *::before,
  .tsumu-product-body *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}

@media (forced-colors: active) {
  .tsumu-product-nav-link.is-active,
  .tsumu-product-studio-nav-link.is-active,
  .tsumu-product-answer:has(input:checked) { border: 2px solid currentColor; }
}