/* 配色の仮案：このブロックだけで差し替え可能。 */
:root {
  --color-text: #1f2328;
  --color-muted: #606873;
  --color-background: #f4f5f6;
  --color-surface: #ffffff;
  --color-border: #dce0e4;
  --color-header: #1f2328;
  --color-header-text: #f9fafb;
  --color-header-muted: #c5cbd2;
  --color-accent: #f59e0b;
  --color-accent-hover: #fbbf24;
  --color-accent-text: #a34b00;
  --color-accent-soft: #fff5df;
  --color-track: #e3e6e9;
  --color-draft: #717983;
  --color-focus: #b85a00;
  --color-error: #a52d24;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--color-text); background: var(--color-background); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif; font-size: 16px; line-height: 1.8; overflow-wrap: anywhere; }
img, iframe, video { max-width: 100%; }
svg { max-width: 100%; }
a { color: inherit; text-underline-offset: .22em; }
a:hover { color: var(--color-accent-text); }
button, input, textarea { font: inherit; color: inherit; }
button { cursor: pointer; padding: 10px 16px; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: 8px; }
button:hover { border-color: var(--color-accent-text); }
button:disabled { cursor: wait; opacity: .6; }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible { outline: 3px solid var(--color-focus); outline-offset: 4px; }
h1, h2, h3 { margin: 0 0 16px; line-height: 1.55; }
h1 { font-size: clamp(26px, 3vw, 38px); letter-spacing: -.025em; }
h2 { font-size: 24px; }
h3 { font-size: 18px; }
p { margin: 0 0 16px; }
[hidden] { display: none !important; }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); border: 0; }
.skip { position: fixed; top: -100px; left: 12px; z-index: 100; background: var(--color-surface); padding: 12px; }
.skip:focus { top: 8px; }
.site-header { background: var(--color-header); color: var(--color-header-text); border-top: 4px solid var(--color-accent); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; max-width: 1248px; margin: auto; padding: 20px 32px; }
.brand { display: block; font-size: 25px; font-weight: 800; letter-spacing: .02em; line-height: 1.3; text-decoration: none; }
.brand span { display: block; margin-top: 5px; color: var(--color-header-muted); font-size: 10px; font-weight: 500; letter-spacing: .15em; }
.brand:hover { color: var(--color-accent); }
.site-nav { display: flex; align-items: center; gap: 26px; }
.site-nav a { font-size: 14px; font-weight: 700; padding: 8px 0; text-decoration: none; border-bottom: 2px solid transparent; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--color-accent); border-color: var(--color-accent); }
.logout, .menu { background: transparent; color: var(--color-header-text); border-color: var(--color-header-muted); font-size: 12px; }
.menu { display: none; }
.site-header :focus-visible { outline-color: var(--color-accent); }
main { max-width: 1248px; padding: 40px 32px 80px; margin: auto; min-height: 75vh; }
main:focus { outline: none; }
.panel { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: 12px; padding: 24px; }
.section-heading { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; margin-bottom: 20px; }
.section-heading h2 { margin: 0; }
.section-heading > span { font-size: 13px; }
.muted { color: var(--color-muted); font-size: 14px; }
.eyebrow { display: block; color: var(--color-muted); font-size: 12px; letter-spacing: .05em; font-weight: 700; margin-bottom: 10px; }
.welcome { margin-bottom: 32px; }
.welcome h2 { font-size: 18px; }
.quiet-button { padding: 5px 14px; font-size: 13px; }
.video-placeholder { aspect-ratio: 16 / 9; width: 100%; display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center; padding: 16px; border-radius: 10px; background: var(--color-header); color: var(--color-header-text); }
.video-placeholder p { margin: 8px 0 0; font-size: 15px; }
.video-placeholder p span { font-size: 13px; color: var(--color-header-muted); }
.video-play { display: flex; flex-direction: column; align-items: center; gap: 12px; background: transparent; color: inherit; border-color: var(--color-header-muted); }
.video-player.is-loaded { padding: 0; overflow: hidden; }
.video-player iframe { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; border: 0; border-radius: inherit; }
.play-symbol { display: grid; place-items: center; width: 48px; height: 48px; border: 1px solid var(--color-header-muted); border-radius: 50%; font-size: 24px; line-height: 1; }
.welcome .video-placeholder { max-width: 480px; margin: auto; }
.dashboard { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1.15fr); gap: 28px; align-items: center; margin: 40px 0 56px; }
.mottos { display: flex; flex-direction: column; gap: 28px; }
.mottos p { margin: 0; font-size: clamp(22px, 2.2vw, 29px); font-weight: 800; line-height: 1.8; padding-left: 20px; border-left: 4px solid var(--color-accent); }
.mottos p:last-child { font-size: clamp(19px, 1.8vw, 23px); font-weight: 700; }
.progress-panel { display: grid; place-items: center; }
.progress-ring { position: relative; width: 260px; max-width: 100%; aspect-ratio: 1; }
.progress-ring svg { width: 100%; height: 100%; display: block; }
.progress-ring circle { fill: none; stroke-width: 7; }
.ring-track { stroke: var(--color-track); }
.ring-value { stroke: var(--color-accent); transform: rotate(-90deg); transform-origin: center; }
.progress-label { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; }
.progress-label > span { font-size: 12px; color: var(--color-muted); }
.progress-label strong { font-size: 52px; line-height: 1.6; letter-spacing: -.04em; font-variant-numeric: tabular-nums; }
.progress-label strong span { font-size: 25px; letter-spacing: 0; }
.dashboard-notes { display: grid; gap: 16px; }
.dashboard-notes .panel { padding: 20px; }
.dashboard-notes h2 { font-size: 15px; margin-bottom: 14px; }
.dashboard-notes p:last-child { margin-bottom: 0; }
.recent-list { list-style: none; padding: 0; margin: 0; }
.recent-list li { display: grid; grid-template-columns: 16px minmax(0, 1fr); gap: 8px; font-size: 12px; line-height: 1.6; }
.recent-list li + li { margin-top: 12px; }
.recent-list a { text-decoration: none; display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 2; overflow: hidden; }
.recent-number { color: var(--color-muted); font-size: 10px; margin-right: 8px; }
.seen-mark { color: var(--color-accent-text); font-weight: 800; }
.next-panel { border-top: 3px solid var(--color-accent); }
.next-step { display: block; text-decoration: none; font-size: 14px; line-height: 1.65; }
.next-step .eyebrow { color: var(--color-accent-text); font-size: 10px; margin-bottom: 5px; }
.next-arrow { display: block; text-align: right; color: var(--color-accent-text); font-size: 20px; }
.chapter { margin: 0 0 32px; }
.chapter h3 { font-size: 15px; padding: 8px 0 8px 12px; margin-bottom: 10px; border-left: 3px solid var(--color-text); }
.step-list { list-style: none; padding: 0; margin: 0; border: 1px solid var(--color-border); border-radius: 10px; overflow: hidden; background: var(--color-surface); }
.step-list li + li { border-top: 1px solid var(--color-border); }
.step-row { display: grid; grid-template-columns: 76px minmax(0, 1fr) 48px; align-items: center; gap: 16px; padding: 19px 22px; text-decoration: none; }
a.step-row:hover { background: var(--color-accent-soft); color: var(--color-text); }
.step-number { font-size: 20px; font-weight: 800; font-variant-numeric: tabular-nums; }
.step-number span { font-size: 11px; font-weight: 400; color: var(--color-muted); }
.step-title { font-size: 15px; font-weight: 600; line-height: 1.75; }
.step-state { text-align: right; font-size: 12px; }
.step-state .seen-mark { font-size: 20px; }
.is-draft { color: var(--color-draft); background: var(--color-background); }
.is-draft .step-title { font-weight: 400; }
.is-draft .step-number { font-weight: 500; }
.page-heading { margin-bottom: 32px; }
.page-heading p:last-child { margin-bottom: 0; }
.search { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px; max-width: 720px; margin: 0 0 36px; }
.search input { width: 100%; border: 1px solid var(--color-border); background: var(--color-surface); border-radius: 8px; padding: 13px 16px; }
.search button { padding: 12px 24px; }
.button { display: inline-block; border: 1px solid var(--color-border); border-radius: 8px; padding: 10px 22px; text-decoration: none; background: var(--color-surface); }
.primary { background: var(--color-accent); color: var(--color-text); border-color: var(--color-accent); font-weight: 700; }
.primary:hover { color: var(--color-text); background: var(--color-accent-hover); border-color: var(--color-accent-hover); }
.empty { background: var(--color-surface); border: 1px dashed var(--color-border); border-radius: 12px; padding: 32px; }
.breadcrumb { display: flex; flex-wrap: wrap; gap: 12px; font-size: 13px; color: var(--color-muted); margin-bottom: 28px; }
.detail { max-width: 880px; margin: auto; }
.detail h1 { margin-bottom: 28px; }
.summary { margin: 32px 0; }
.summary h2 { font-size: 21px; }
.summary p { white-space: pre-line; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; margin: 24px 0 36px; }
.actions p { margin: 0; font-size: 12px; }
.actions button[aria-pressed="true"] { background: var(--color-header); border-color: var(--color-header); color: var(--color-header-text); }
.step-navigation { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; border-top: 1px solid var(--color-border); padding-top: 24px; margin: 32px 0; font-size: 14px; }
.step-navigation a { font-weight: 600; }
.step-navigation-empty { color: var(--color-muted); font-size: 12px; }
.unavailable-link { color: var(--color-draft); }
.unavailable-link small { display: inline-block; font-size: 11px; background: var(--color-track); padding: 0 6px; border-radius: 4px; }
.back-link { display: inline-block; margin-top: 16px; font-size: 14px; }
.answer-list { display: grid; gap: 20px; max-width: 880px; }
.answer-card h2 { font-size: 21px; }
.answer-card h2 a { text-decoration: none; }
.answer-open { display: inline-block; margin-top: 18px; font-size: 13px; color: var(--color-accent-text); font-weight: 700; }
.related-steps { border-top: 1px solid var(--color-border); padding-top: 18px; margin-top: 24px; }
.related-steps h3 { font-size: 13px; margin-bottom: 8px; }
.related-steps ul { padding-left: 20px; margin: 0; font-size: 13px; }
.related-steps li + li { margin-top: 8px; }
.guide-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 2.6fr); gap: 36px; align-items: start; }
.guide-toc h2 { font-size: 15px; }
.guide-toc ol { margin: 0; padding-left: 20px; font-size: 13px; }
.guide-toc li + li { margin-top: 12px; }
.guide-body { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: 12px; padding: 32px; }
.guide-section { scroll-margin-top: 24px; }
.guide-section + .guide-section { padding-top: 28px; margin-top: 28px; border-top: 1px solid var(--color-border); }
.guide-section h2 { font-size: 22px; }
.guide-section p:last-child { margin-bottom: 0; }
.onboarding-answers { margin: 0; padding-left: 24px; }
.onboarding-answers li + li { margin-top: 24px; }
.onboarding-answers h3 { font-size: 16px; }
.onboarding-answer { white-space: pre-wrap; overflow-wrap: anywhere; }
#welcome-message { margin-top: 12px; }
footer { max-width: 1184px; margin: auto; padding: 24px 32px; border-top: 1px solid var(--color-border); display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; color: var(--color-muted); font-size: 12px; }
#toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%); width: max-content; max-width: calc(100% - 32px); background: var(--color-header); color: var(--color-header-text); border-radius: 8px; padding: 12px 20px; font-size: 13px; opacity: 0; pointer-events: none; z-index: 40; }
#toast.visible { opacity: 1; }
.auth-wrap { max-width: 520px; margin: 48px auto 80px; padding: 32px; min-height: 0; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: 12px; }
.auth-wrap h1 { font-size: 28px; }
.auth-wrap h2 { font-size: 21px; }
.auth-wrap label { display: block; margin: 20px 0 6px; font-weight: 700; font-size: 14px; }
.auth-wrap input { display: block; width: 100%; padding: 13px; border: 1px solid var(--color-border); border-radius: 8px; background: var(--color-surface); }
.onboarding-form textarea { display: block; width: 100%; max-width: 100%; box-sizing: border-box; padding: 13px; border: 1px solid var(--color-border); border-radius: 8px; background: var(--color-surface); resize: vertical; overflow-wrap: anywhere; }
.auth-wrap button { width: 100%; margin-top: 16px; }
.auth-wrap p { font-size: 14px; }
.auth-wrap .hint { font-size: 12px; color: var(--color-muted); }
.auth-wrap form + p { margin-top: 24px; }
.auth-wrap #message, .auth-message { color: var(--color-error); margin: 16px 0; }
.auth-wrap .button { margin: 12px 0; }
.billing-wrap { max-width: 720px; }
.billing-wrap ol { padding-left: 24px; font-size: 14px; }
.billing-wrap li + li { margin-top: 12px; }
.billing-wrap #recovery-steps { margin-top: 28px; }
.billing-wrap #billing-state { font-size: 16px; font-weight: 700; padding: 16px; background: var(--color-accent-soft); border-radius: 8px; }
.billing-test { border-top: 1px solid var(--color-border); margin-top: 32px; padding-top: 24px; }
.test-banner { background: var(--color-accent-soft); padding: 10px 20px; font-size: 12px; text-align: center; }
@media (max-width: 900px) {
  .header-inner { flex-wrap: wrap; gap: 14px; padding: 18px 24px; }
  .menu { display: block; margin-left: auto; }
  .site-nav { display: none; flex-basis: 100%; align-items: stretch; gap: 0; }
  .menu-open .site-nav { display: flex; flex-direction: column; }
  .site-nav a { padding: 12px 0; }
  .site-nav .logout { margin-top: 12px; align-self: flex-start; }
  .dashboard { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .mottos { gap: 16px; }
  .mottos p { font-size: 25px; }
  .dashboard-notes { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .guide-layout { grid-template-columns: minmax(0, 1fr); gap: 24px; }
}
@media (max-width: 600px) {
  .header-inner { padding: 16px; }
  .brand { font-size: 22px; }
  .brand span { font-size: 9px; }
  main { padding: 24px 16px 56px; }
  h2 { font-size: 21px; }
  .panel { padding: 18px; }
  .welcome { margin-bottom: 28px; }
  .welcome .section-heading { margin-bottom: 16px; }
  .dashboard { margin: 28px 0 40px; }
  .mottos p { font-size: 24px; }
  .mottos p:last-child { font-size: 21px; }
  .progress-ring { width: 240px; }
  .dashboard-notes { grid-template-columns: minmax(0, 1fr); }
  .step-row { grid-template-columns: 48px minmax(0, 1fr) 38px; gap: 10px; padding: 16px 12px; }
  .step-number { font-size: 17px; }
  .step-number span { display: block; font-size: 10px; }
  .step-title { font-size: 14px; }
  .step-state { font-size: 10px; }
  .chapter { margin-bottom: 24px; }
  .search { gap: 6px; }
  .search input { padding: 12px; font-size: 14px; }
  .search button { padding: 12px 16px; font-size: 14px; }
  .video-placeholder p { font-size: 13px; }
  .video-placeholder p span { font-size: 11px; }
  .play-symbol { width: 36px; height: 36px; font-size: 20px; }
  .step-navigation { grid-template-columns: minmax(0, 1fr); gap: 20px; }
  .answer-card h2 { font-size: 19px; }
  .guide-body { padding: 22px 18px; }
  .guide-section h2 { font-size: 20px; }
  .auth-wrap { margin: 24px 16px 56px; padding: 24px 20px; }
  .auth-wrap h1 { font-size: 25px; }
  footer { padding: 20px 16px; font-size: 11px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }