/* A practical chapter between discovering a shortcut and choosing a plan. */
html.training-demo-layout-active, html.training-demo-layout-active body { overflow-anchor: none; }
.training-demo { position: relative; padding: clamp(68px, 8vw, 116px) 0 66px; background: var(--bg-surface-2); color: var(--text-primary); overflow: hidden; }
.training-demo::before { content: ''; position: absolute; top: 0; left: 50%; height: 44px; width: 1px; background: linear-gradient(var(--accent), transparent); }
.training-demo-inner { width: min(1180px, calc(100% - 48px)); margin-inline: auto; }
.training-demo-heading { text-align: center; }
.training-demo-kicker { color: var(--accent); font-size: 12px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.training-demo h2 { margin: 16px auto 0; font-size: clamp(34px, 4.6vw, 62px); line-height: 1.06; font-weight: 780; letter-spacing: -.05em; text-wrap: balance; }
.training-demo-heading > p { max-width: 580px; margin: 19px auto 15px; color: var(--text-secondary); font-size: clamp(16px, 1.5vw, 18px); line-height: 1.6; text-wrap: balance; }
.training-demo-preview { display: inline-block; color: var(--text-secondary); font-size: 12px; line-height: 1.6; }
.training-demo-workbench { margin-top: 40px; border-block: 1px solid var(--border-strong); }
.training-demo [hidden] { display: none !important; }
.training-demo-toolbar { display: flex; justify-content: space-between; align-items: center; gap: 18px; padding: 14px 0; border-bottom: 1px solid var(--border-color); }
.training-demo-progress { display: flex; align-items: center; gap: 12px; color: var(--text-secondary); font-size: 12px; font-weight: 700; }
.training-demo-dots { display: flex; gap: 5px; }
.training-demo-dots i { width: 7px; height: 7px; border-radius: 50%; background: var(--border-strong); }
.training-demo-dots i.is-current { background: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.training-demo-dots i.is-done { background: var(--ok); }
.training-demo-os { display: flex; gap: 3px; }
.training-demo button { font-family: inherit; cursor: pointer; }
.training-demo-os button { min-height: 44px; padding: 8px 12px; border: 1px solid transparent; border-radius: 9px; color: var(--text-secondary); background: transparent; font-size: 12px; font-weight: 650; }
.training-demo-os button[aria-pressed="true"] { background: var(--bg-surface); border-color: var(--border-strong); color: var(--text-primary); box-shadow: var(--shadow-sm); }
.training-demo button:focus-visible, .training-demo a:focus-visible, .training-demo-capture:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
.training-demo-layout { display: grid; grid-template-columns: 1fr 1.1fr; gap: clamp(30px, 5vw, 80px); align-items: center; padding: 44px 0; }
.training-demo-question, .training-demo-summary { min-width: 0; }
.training-demo-task { display: inline-block; margin-bottom: 12px; color: var(--accent); font-size: 11px; font-weight: 800; letter-spacing: .11em; text-transform: uppercase; }
.training-demo h3 { margin: 0; font-size: clamp(26px, 2.6vw, 35px); font-weight: 750; line-height: 1.17; letter-spacing: -.04em; text-wrap: balance; scroll-margin-top: 110px; }
.training-demo h3:focus { outline: none; }
.training-demo-question > p:not(.training-demo-feedback), .training-demo-summary > p { color: var(--text-secondary); font-size: 14px; line-height: 1.65; margin: 14px 0 20px; }
.training-demo-choices { display: grid; gap: 9px; }
.training-demo-choices button { display: flex; align-items: center; gap: 16px; width: 100%; min-height: 62px; padding: 10px 16px; border: 1px solid var(--border-strong); border-radius: 12px; background: var(--bg-surface); color: var(--text-primary); text-align: left; transition: border-color .18s, background .18s, transform .18s; }
.training-demo-choices button:hover:not([aria-disabled="true"]) { border-color: var(--accent); transform: translateX(3px); }
.training-demo-choice-number { color: var(--text-tertiary); font-size: 11px; font-weight: 650; font-variant-numeric: tabular-nums; }
.training-demo-keys { display: inline-flex; align-items: center; flex-wrap: wrap; gap: 7px; }
.training-demo-keys kbd { min-width: 30px; padding: 6px 8px; border: 1px solid var(--border-strong); border-bottom-width: 2px; border-radius: 6px; background: var(--bg-surface-2); font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: 13px; font-weight: 700; text-align: center; }
.training-demo-keys b { font-size: 12px; color: var(--text-secondary); }
.training-demo-choice-mark { margin-left: auto; font-size: 17px; font-weight: 700; }
.training-demo-choices button[data-state="correct"] { border-color: var(--ok); background: var(--ok-soft); }
.training-demo-choices button[data-state="correct"] .training-demo-choice-mark { color: var(--ok); }
.training-demo-choices button[data-state="retry"] { border-color: var(--accent); background: var(--accent-soft); }
.training-demo-choices button[aria-disabled="true"] { cursor: default; }
.training-demo-feedback { min-height: 48px; margin: 14px 0 0; color: var(--text-secondary); font-size: 13px; line-height: 1.6; }
.training-demo-feedback[data-state="correct"] { color: var(--text-primary); }
.training-demo-text-button { min-height: 44px; padding: 8px 0; border: 0; background: transparent; color: var(--text-secondary); font-size: 12px; font-weight: 700; text-decoration: underline; text-underline-offset: 4px; }
.training-demo-text-button:hover { color: var(--accent); }
.training-demo-capture { display: grid; gap: 7px; margin-top: 8px; padding: 14px; border: 1px dashed var(--border-strong); border-radius: 12px; background: var(--bg-surface); color: var(--text-secondary); font-size: 12px; line-height: 1.5; }
.training-demo-capture strong { color: var(--text-primary); font-weight: 700; }
.training-demo-capture:focus { border-style: solid; border-color: var(--accent); background: var(--accent-soft); }
.training-demo-virtual-panel { position: fixed; bottom: max(8px, env(safe-area-inset-bottom, 0px)); z-index: 110; min-width: 0; color: var(--text-primary); pointer-events: none; }
.training-demo-virtual-panel[hidden], .training-demo-virtual-panel [hidden] { display: none !important; }
.training-demo-virtual-panel.is-dormant { visibility: hidden; }
.training-demo-virtual-panel .training-demo-text-button { pointer-events: auto; }
.training-demo-virtual-status { margin: 12px; padding: 12px 16px; border: 1px solid var(--border-strong); border-radius: 12px; background: var(--bg-surface); box-shadow: var(--shadow-sm); color: var(--text-secondary); font-size: 12px; line-height: 1.6; }
.training-demo-virtual-frame { position: relative; width: 100%; min-width: 0; }
.training-demo-virtual-panel[data-keyboard-state="opening"] .training-demo-virtual-frame,
.training-demo-virtual-panel[data-keyboard-state="closing"] .training-demo-virtual-frame { will-change: transform, opacity; }
.training-demo-virtual-frame iframe { display: block; width: 100%; height: 400px; border: 0; }
.training-demo-virtual-panel:not(.is-dormant):not([inert]) iframe { pointer-events: auto; }
.training-demo-virtual-frame.is-preparing { height: 0; overflow: hidden; visibility: hidden; }
.training-demo-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 8px 18px; margin-top: 5px; }
.training-demo-optional-note { flex-basis: 100%; margin: 0; color: var(--text-secondary); font-size: 12px; line-height: 1.6; }
.training-demo-next { min-height: 44px; padding: 11px 16px; border: 1px solid var(--border-strong); border-radius: 10px; color: var(--text-primary); background: var(--bg-surface); font-size: 12px; font-weight: 750; }
.training-demo-next:hover { border-color: var(--accent); color: var(--accent); }
.training-demo-stage { position: relative; display: grid; align-content: center; min-width: 0; min-height: 380px; padding: 32px 20px 60px; background: radial-gradient(ellipse at 45% 55%, var(--accent-soft), transparent 69%); }
.training-demo-stage:focus { outline: none; }
.training-demo-stage-caption { position: absolute; top: 0; left: 20px; color: var(--text-tertiary); font-size: 10px; letter-spacing: .08em; text-transform: uppercase; }
.training-demo-paper { position: relative; width: 100%; border: 1px solid var(--border-strong); border-radius: 12px; background: var(--bg-surface); box-shadow: 0 24px 44px -24px rgba(15,23,42,.24); transform: rotate(-2deg); }
.training-demo-paper-bar { display: flex; align-items: center; gap: 12px; padding: 16px 18px; border-bottom: 1px solid var(--border-color); font-size: 12px; font-weight: 700; }
.training-demo-paper-icon { display: grid; place-items: center; width: 25px; height: 28px; border: 1px solid var(--border-color); border-radius: 5px; color: var(--accent); font-size: 20px; }
.training-demo-paper-menu { margin-left: auto; font-size: 20px; color: var(--text-tertiary); }
.training-demo-paper-body { padding: 26px 24px 20px; }
.training-demo-paper-date { color: var(--text-tertiary); font-size: 10px; text-transform: uppercase; letter-spacing: .1em; }
.training-demo-line { width: fit-content; max-width: 100%; margin: 19px 0 0; font-size: clamp(12px, 1.3vw, 15px); line-height: 1.8; }
.training-demo-paper[data-effect="missing"] .training-demo-deleted { opacity: .18; text-decoration: line-through; text-decoration-color: var(--accent); }
.training-demo-paper[data-effect="restored"] .training-demo-deleted { background: var(--ok-soft); box-shadow: -5px 0 var(--ok-soft), 5px 0 var(--ok-soft); }
.training-demo-paper[data-effect="selected"] .training-demo-line { background: rgba(59,130,246,.2); box-shadow: -3px 0 rgba(59,130,246,.2), 3px 0 rgba(59,130,246,.2); }
.training-demo-line mark { color: inherit; background: transparent; }
.training-demo-paper[data-effect="found"] mark { background: #fde68a; color: #422006; border-radius: 3px; box-shadow: 0 0 0 2px #fde68a; }
.training-demo-cursor { display: block; margin-top: 18px; width: 1.5px; height: 17px; background: var(--accent); }
.training-demo-paper-foot { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 13px 18px; border-top: 1px solid var(--border-color); color: var(--text-secondary); font-size: 10px; }
.training-demo-paper-save { color: var(--ok); }
.training-demo-find { display: flex; justify-content: space-between; gap: 12px; margin: 12px 16px 0; padding: 8px 12px; border: 1px solid var(--border-strong); border-radius: 6px; color: var(--text-secondary); font-size: 11px; }
.training-demo-effect { position: absolute; right: 0; bottom: 19px; display: inline-flex; align-items: center; gap: 9px; max-width: 100%; padding: 12px 14px; border: 1px solid var(--border-strong); border-radius: 12px; background: var(--bg-surface); box-shadow: var(--shadow-md); color: var(--text-primary); font-size: 12px; font-weight: 750; }
.training-demo-effect-icon { display: grid; place-items: center; flex: none; width: 23px; height: 23px; border-radius: 50%; background: var(--ok-soft); color: var(--ok); }
.training-demo-effect .training-demo-keys { margin-left: 8px; gap: 4px; }
.training-demo-effect kbd { min-width: 24px; padding: 4px 6px; font-size: 11px; }
.training-demo-summary ul { padding: 0; margin: 22px 0; list-style: none; }
.training-demo-summary li { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--border-color); font-size: 13px; }
.training-demo-recap-gesture { display: grid; justify-items: start; gap: 6px; }
.training-demo-recap-gesture kbd { min-width: 24px; padding: 3px 6px; font-size: 11px; }
.training-demo-summary li small { color: var(--text-secondary); font-size: 11px; white-space: nowrap; }
.training-demo-summary .training-demo-summary-note { font-size: 13px; }
.training-demo-cta { display: flex; justify-content: center; align-items: center; flex-wrap: wrap; gap: 15px 26px; margin-top: 30px; }
.training-demo-cta > .btn { flex: none; }
.training-demo-pro-option { max-width: 310px; text-align: center; }
.training-demo-pro-help { display: block; color: var(--text-secondary); font-size: 11px; line-height: 1.6; }
.training-demo-pro-link { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; color: var(--text-primary); font-size: 13px; font-weight: 700; text-decoration: none; }
.training-demo-pro-link:hover { color: var(--accent); }
.training-demo-summary .training-demo-cta { align-items: stretch; flex-direction: column; gap: 4px; margin-top: 20px; }
.training-demo-summary .training-demo-cta .btn { width: 100%; text-align: center; }
.training-demo-summary .training-demo-pro-option { max-width: none; }
.training-demo-summary > .training-demo-text-button { display: block; margin: 12px auto 0; font-size: 11px; }
.training-demo-fallback { max-width: 620px; margin: 30px auto; padding: 25px; border-block: 1px solid var(--border-strong); color: var(--text-secondary); font-size: 14px; line-height: 1.7; }
.training-demo.is-mobile .training-demo-inner { width: min(560px, calc(100% - 36px)); }
.training-demo.is-mobile .training-demo-layout { grid-template-columns: 1fr; gap: 12px; padding: 24px 0; }
.training-demo.is-mobile .training-demo-question { display: contents; }
.training-demo.is-mobile .training-demo-question > .training-demo-task { grid-row: 1; margin-bottom: 0; }
.training-demo.is-mobile .training-demo-question > h3 { grid-row: 2; }
.training-demo.is-mobile .training-demo-question > #trainingDemoInstruction { grid-row: 3; margin: 0; }
.training-demo.is-mobile .training-demo-question > .training-demo-choices { grid-row: 5; }
.training-demo.is-mobile .training-demo-question > .training-demo-keyboard { grid-row: 6; }
.training-demo.is-mobile .training-demo-question > .training-demo-feedback { grid-row: 7; margin: 0; }
.training-demo.is-mobile .training-demo-question > .training-demo-actions { grid-row: 8; }
.training-demo.is-mobile .training-demo-stage { grid-row: 4; min-height: 285px; padding: 28px 16px 48px; }
.training-demo.is-mobile .training-demo-workbench[data-phase="summary"] .training-demo-stage { grid-row: 1; }
.training-demo.is-mobile .training-demo-paper-body { padding: 20px 20px 15px; }
.training-demo.is-mobile .training-demo-line { font-size: 13px; margin-top: 14px; }
.training-demo.is-mobile .training-demo-effect { bottom: 12px; }
.training-demo.is-mobile .training-demo-heading > p { max-width: 470px; }
.training-demo.is-mobile .training-demo-question, .training-demo.is-mobile .training-demo-summary { padding-top: 6px; }
.training-demo.is-mobile .training-demo-feedback { min-height: 42px; }
.training-demo.is-mobile .training-demo-workbench { margin-top: 28px; }
@media (max-width: 430px) {
    .training-demo-toolbar { align-items: flex-start; flex-direction: column; gap: 10px; padding-block: 16px 10px; }
    .training-demo-os { margin-left: -8px; }
    .training-demo-os button { padding-inline: 9px; }
    .training-demo-paper-bar { padding: 12px; font-size: 11px; }
    .training-demo-stage { padding-inline: 7px; }
    .training-demo-stage-caption { left: 7px; }
    .training-demo-paper-body { padding-inline: 14px; }
    .training-demo-line { font-size: clamp(12px, 3.35vw, 13px); }
    .training-demo-effect { padding: 9px; gap: 7px; font-size: 11px; }
    .training-demo-effect .training-demo-keys { margin-left: 0; }
    .training-demo-cta { flex-direction: column; gap: 8px; }
    .training-demo-cta .btn { width: 100%; text-align: center; font-size: 13px; }
}
/* Keep the document and all three answers together even in a short landscape
   viewport once the keyboard has slid away. The normal exercise stays spacious. */
@media (min-height: 601px) and (max-height: 800px) {
    .training-demo.is-reviewing .training-demo-stage { min-height: 0; padding: 18px 7px 34px; }
    .training-demo.is-reviewing .training-demo-paper-bar { padding: 10px 12px; }
    .training-demo.is-reviewing .training-demo-paper-body { padding: 16px 14px 12px; }
    .training-demo.is-reviewing .training-demo-line { margin-top: 11px; font-size: 12px; line-height: 1.65; }
    .training-demo.is-reviewing .training-demo-cursor { margin-top: 12px; height: 14px; }
    .training-demo.is-reviewing .training-demo-paper-foot { padding: 9px 12px; }
    .training-demo.is-reviewing .training-demo-find { margin: 8px 12px 0; padding: 6px 10px; line-height: 1.5; }
    .training-demo.is-reviewing .training-demo-effect { bottom: 6px; padding: 8px; }
}
.training-demo.is-review-compact .training-demo-layout { gap: 8px; }
.training-demo.is-review-compact .training-demo-stage { min-height: 0; padding: 0; }
.training-demo.is-review-compact .training-demo-stage-caption,
.training-demo.is-review-compact .training-demo-paper-date,
.training-demo.is-review-compact .training-demo-paper-icon,
.training-demo.is-review-compact .training-demo-paper-menu,
.training-demo.is-review-compact .training-demo-cursor,
.training-demo.is-review-compact .training-demo-effect { display: none; }
.training-demo.is-review-compact .training-demo-paper { transform: none; }
.training-demo.is-review-compact .training-demo-paper-bar { padding: 4px 8px; font-size: 10px; line-height: 1.2; }
.training-demo.is-review-compact .training-demo-paper-body { padding: 6px 12px; }
.training-demo.is-review-compact .training-demo-line { margin-top: 3px; font-size: 11px; line-height: 1.2; }
.training-demo.is-review-compact .training-demo-paper-foot { padding: 4px 8px; font-size: 9px; line-height: 1.2; }
.training-demo.is-review-compact .training-demo-find { margin: 3px 8px 0; padding: 3px 6px; font-size: 9px; line-height: 1.2; }
.training-demo.is-review-compact .training-demo-choices { gap: 6px; }
.training-demo.is-review-compact .training-demo-choices button { min-height: 40px; padding: 5px 12px; }
.training-demo.is-review-compact .training-demo-choices kbd { min-width: 24px; padding: 3px 6px; font-size: 11px; }
@media (prefers-reduced-motion: reduce) {
    .training-demo-choices button { transition: none; }
    .training-demo-choices button:hover { transform: none; }
    .training-demo-paper { transform: none; }
}