/* A practice instrument, not a stack of website cards. Shared only by the two
   trainers. Long setup/forms/reports scroll in their own surfaces; training
   controls remain inside the visual viewport, including the soft keyboard. */
.trainer-workspace {
    --border: #354354;
    --muted: #9aa9ba;
    height: var(--cw-viewport-height, 100dvh);
    min-height: 0;
    overflow: hidden;
}
.trainer-workspace .app:has(.training-grid) {
    display: flex;
    flex-direction: column;
    width: 100%;
    height: 100%;
    min-height: 0;
    padding: 12px 18px;
    gap: 8px;
}
.trainer-workspace .app-header {
    flex: none;
    gap: 4px 12px;
    margin: 0;
    padding: 0;
    border: 0;
}
.trainer-workspace .app-header h1 { font-size: 1rem; line-height: 1.3; min-height: 36px; display: flex; align-items: center; gap: .35em; }
.trainer-workspace .app-header .trainer-mode { width: auto; min-width: 0; max-width: 58%; margin-left: auto; }
.trainer-workspace .app .app-nav {
    /* Size around labels; enlarged accessibility text may wrap, never overlap. */
    display: flex;
    flex-wrap: wrap;
    flex: 0 0 100%;
    gap: 0;
    overflow: visible;
    border-bottom: 1px solid var(--border);
}
.trainer-workspace .app .app-nav > .nav-btn {
    flex: 1 0 auto;
    min-width: 44px;
    min-height: 44px;
    padding: 8px 4px;
    border: 0;
    border-radius: 0;
    font-size: .85rem;
    background: transparent;
}
.trainer-workspace .app-nav > .nav-btn.active { color: var(--text); box-shadow: inset 0 -3px var(--accent); }
.trainer-workspace :is(button, select, input:not([type=checkbox]), summary) { min-height: 44px; }
.trainer-workspace :is(button, select, input, summary, a):focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.trainer-workspace .view.active { flex: 1 1 0; min-height: 0; overflow: auto; scrollbar-gutter: stable; }
.trainer-workspace #view-training.active { display: flex; flex-direction: column; overflow: visible; scrollbar-gutter: auto; gap: 8px; }
.trainer-workspace .training-grid { display: flex; flex: 1 1 0; min-height: 0; flex-direction: column; gap: 8px; }
.trainer-workspace .side-panel {
    position: relative;
    flex: none;
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
    min-height: 44px;
    padding: 0;
    background: transparent;
    border: 0;
}
.trainer-workspace .side-panel .lesson-chars { margin: 0 auto 0 0; font-size: .9rem; letter-spacing: 0; font-weight: 600; }
.trainer-workspace .phone-training-details > summary { padding: 10px 8px; white-space: nowrap; border: 1px solid var(--border); border-radius: 6px; }
.trainer-workspace .phone-training-details[open] > summary { background: var(--panel-2); border-color: var(--accent); }
.trainer-workspace .training-setup-fields {
    position: absolute;
    z-index: 10;
    top: calc(100% + 6px);
    right: 0;
    width: min(100%, 460px);
    max-height: calc(var(--cw-viewport-height, 100dvh) - 224px);
    overflow: auto;
    overscroll-behavior: contain;
    padding: 12px 16px;
    border: 1px solid var(--accent);
    border-radius: 8px;
    background: var(--panel);
    box-shadow: 0 12px 32px #0006;
}
.trainer-workspace .practice-keyer { font-size: .8rem; padding-inline: 10px; }
.trainer-workspace .practice-keyer::before { content: ''; display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: var(--muted); margin-right: 6px; }
.trainer-workspace .practice-keyer.connected::before { background: var(--green); }
.trainer-workspace .train-main {
    position: relative;
    display: flex;
    flex: 1 1 0;
    min-height: 0;
    min-width: 0;
    flex-direction: column;
    gap: 8px;
    padding: clamp(10px, 2vw, 24px);
    border-radius: 12px;
}
.trainer-workspace .practice-stage {
    display: flex;
    flex: 1 1 0;
    min-height: 0;
    flex-direction: column;
    justify-content: safe center;
    align-items: center;
    overflow: auto;
    text-align: center;
    padding: 4px;
}
.trainer-workspace .practice-stage > * { flex-shrink: 0; max-width: 100%; }
.trainer-workspace .practice-intro { font-size: clamp(1.6rem, 4vw, 2.5rem); font-weight: 600; letter-spacing: -.035em; line-height: 1.15; margin: 0 0 18px; }
.trainer-workspace.trainer-running .practice-stage > :is(.practice-intro, .new-char-hint) { display: none; }
.trainer-workspace:not(.trainer-running) .prompt-area, .trainer-workspace .new-char-hint[hidden] { display: none; }
.trainer-workspace .landing-info { max-width: 42ch; line-height: 1.6; font-size: .95rem; margin: 12px 0; }
.trainer-workspace .new-char-hint { margin: 0; justify-content: center; }
.trainer-workspace .nch-char { font: 600 1.6rem var(--mono); }
.trainer-workspace .nch-el { background: var(--accent); }
.trainer-workspace .text-file-area { width: min(100%, 440px); margin: 0; text-align: left; }
.trainer-workspace .prompt-area { width: 100%; margin: 0; }
.trainer-workspace .lbl-prompt { font-family: var(--mono); font-size: clamp(1.8rem, 5vw, 3.5rem); line-height: 1.15; min-height: 0; letter-spacing: .06em; overflow-wrap: anywhere; }
.trainer-workspace .lbl-feedback { font-size: 1rem; min-height: 0; margin: 4px 0; }
.trainer-workspace .lbl-keying { min-height: 0; }
.trainer-workspace :is(.lbl-feedback, .lbl-keying):empty { display: none; }
.trainer-workspace .input-instruction { font-size: .85rem; margin: 8px 0; }
.trainer-workspace input.txt-input { min-height: 50px; font-family: var(--mono); font-size: 1.5rem; letter-spacing: .12em; max-width: 360px; border-color: #607a99; }
.trainer-workspace .session-stats { margin-top: 8px; font-size: .8rem; }
.trainer-workspace:has(#btn-mode-key.active) #txt-input { display: none; }
.trainer-workspace .diff-immediate:empty { display: none; }
.trainer-workspace :is(.diff-immediate, .copy-diff-slot) { position: static; margin-top: 6px; text-align: center; white-space: normal; overflow-wrap: anywhere; }
.trainer-workspace .dg { flex-wrap: wrap; justify-content: center; max-width: 100%; }
.trainer-workspace .train-main > .btn-row { display: flex; flex: none; flex-wrap: nowrap; gap: 6px; margin: 0; }
.trainer-workspace .train-main > .btn-row > button { min-width: 0; padding: 8px 12px; }
.trainer-workspace #btn-start-stop { margin-right: auto; font-weight: 600; }
.trainer-workspace:not(.trainer-running) .train-main > .btn-row > button:disabled { display: none; }
.trainer-workspace:not(.trainer-running) #btn-start-stop { width: 100%; }
.trainer-workspace .txt-history { flex: 0 1 auto; min-height: 0; max-height: 64px; border: 0; border-top: 1px solid var(--border); border-radius: 0; padding: 6px 0 0; background: transparent; font-size: .8rem; }
.trainer-workspace .txt-history:empty { display: none; }
.trainer-workspace .session-complete:not([hidden]) { position: absolute; inset: 0; z-index: 2; margin: 0; overflow: auto; overscroll-behavior: contain; }
.trainer-workspace #session-report-mount { max-height: none; overflow: visible; }
.trainer-workspace #paddle-dock-slot { flex: none; min-height: 0; }
.trainer-workspace:has(#btn-mode-type.active) #paddle-dock-slot { display: none; }
.trainer-workspace .paddle-dock { max-width: none; margin: 0; border-radius: 8px; touch-action: pan-y; }
.trainer-workspace .pd-body { padding: 6px; }
.trainer-workspace .pd-zones { height: 88px; }
.trainer-workspace .practice-paddle-settings { position: relative; }
.trainer-workspace .practice-paddle-settings > summary { display: list-item; padding: 12px 6px; cursor: pointer; color: var(--muted); }
.trainer-workspace .practice-paddle-settings .pd-settings { position: absolute; z-index: 12; bottom: 100%; left: 0; right: 0; max-height: calc(var(--cw-viewport-height, 100dvh) - 200px); overflow: auto; padding: 12px; margin: 0; background: var(--panel); border: 1px solid var(--border); border-radius: 8px; touch-action: pan-y; }
.trainer-workspace .trainer-connection { padding-bottom: 20px; margin-bottom: 20px; border-bottom: 1px solid var(--border); }
.trainer-workspace .box-dock { padding: 0; margin: 0; }
.trainer-workspace .trainer-game-links { display: flex; flex-wrap: wrap; gap: 12px; margin-block: 24px; }
.trainer-workspace .legal-footer { padding: 16px 0; margin: 24px 0 0; }
.trainer-workspace .trainer-about-content { max-width: 720px; margin: 0 auto; padding: 24px 12px 12px; }
.trainer-workspace .trainer-about-brand { display: flex; gap: 16px; align-items: center; }
.trainer-workspace .trainer-about-brand img { flex: none; padding: 8px; border-radius: 12px; background: var(--text); }
.trainer-workspace .trainer-about-brand h2 { margin: 0; font-size: clamp(1.7rem, 5vw, 2.3rem); line-height: 1.15; letter-spacing: -.035em; }
.trainer-workspace .trainer-about-brand p { margin: 4px 0 0; color: var(--muted); font-size: .85rem; }
.trainer-workspace .trainer-about-product { margin: 26px 0 6px; font-size: 1.15rem; }
.trainer-workspace .trainer-about-lead { margin: 0; font-size: 1.15rem; line-height: 1.45; }
.trainer-workspace .trainer-about-intro { max-width: 62ch; color: var(--muted); font-size: .9rem; line-height: 1.6; margin: 10px 0; }
.trainer-workspace .trainer-about-version { color: var(--muted); font-size: .8rem; margin: 10px 0 22px; }
.trainer-workspace .trainer-about-box { display: flex; flex-direction: column; gap: 8px; padding: 18px 20px; border: 1px solid var(--accent); border-left-width: 4px; border-radius: 8px; background: var(--panel); color: var(--text); text-decoration: none; }
.trainer-workspace .trainer-about-box:hover { background: var(--panel-2); }
.trainer-workspace .trainer-about-box strong { font-size: 1.1rem; line-height: 1.4; }
.trainer-workspace .trainer-about-box span { font-size: .85rem; color: var(--muted); line-height: 1.5; }
.trainer-workspace .trainer-about-discover h3 { margin: 28px 0 8px; font-size: 1rem; }
.trainer-workspace .trainer-about-games { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 24px; }
.trainer-workspace .trainer-about-games a { display: flex; flex-direction: column; gap: 5px; min-height: 44px; padding: 14px 0; color: var(--text); text-decoration: none; border-bottom: 1px solid var(--border); }
.trainer-workspace .trainer-about-games a:hover strong { color: var(--accent-hover); }
.trainer-workspace .trainer-about-games span { font-size: .8rem; line-height: 1.5; color: var(--muted); }
.trainer-workspace .trainer-about-links { display: flex; flex-wrap: wrap; gap: 0 22px; margin-top: 18px; }
.trainer-workspace .trainer-about-links a { display: inline-flex; align-items: center; min-height: 44px; color: var(--accent-hover); font-size: .85rem; text-underline-offset: 3px; }
.trainer-workspace .trainer-about-browser { color: var(--muted); font-size: .75rem; }
.trainer-workspace #view-about .legal-footer { margin-top: 14px; font-size: .75rem; }
.trainer-workspace #view-about .legal-footer a { display: inline-flex; align-items: center; min-height: 44px; }
.trainer-workspace #view-about .legal-footer::after { content: none; }
@media (max-width: 640px) {
    .trainer-workspace .app:has(.training-grid) { padding: 6px 8px; gap: 6px; }
    .trainer-workspace .app .app-nav > .nav-btn { font-size: .78rem; }
    .trainer-workspace .side-panel { gap: 5px; }
    .trainer-workspace .side-panel .lesson-chars { font-size: .8rem; }
    .trainer-workspace .phone-training-details > summary { font-size: .78rem; padding-inline: 6px; }
    .trainer-workspace .practice-keyer { padding-inline: 7px; }
    .trainer-workspace .train-main > .btn-row > button { font-size: .8rem; padding-inline: 7px; }
    .trainer-workspace .trainer-about-content { padding: 18px 8px 8px; }
    .trainer-workspace .trainer-about-games { column-gap: 16px; }
    /* Preserve every lesson statistic at the user's text size. The visual
       two-line row retains the table/header semantics and existing selection. */
    .trainer-workspace .lessons-table thead { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); }
    .trainer-workspace .lessons-table tbody { display: block; }
    .trainer-workspace .lessons-table tr { display: grid; grid-template-columns: 1.7rem 3rem minmax(0, 1fr) minmax(4.5rem, 1fr); border-bottom: 1px solid var(--border); padding: 4px; }
    .trainer-workspace .lessons-table td { min-width: 0; border: 0; padding: 5px 4px; overflow-wrap: anywhere; }
    .trainer-workspace .lessons-table td:nth-child(2) { font-weight: 700; }
    .trainer-workspace .lessons-table td:nth-child(3) { font-family: var(--mono); }
    .trainer-workspace .lessons-table td:nth-child(4) { font-size: .75rem; }
    .trainer-workspace .lessons-table td[data-label] { grid-row: 2; display: flex; flex-direction: column; gap: 2px; font-size: .8rem; }
    .trainer-workspace .lessons-table td:nth-child(5) { grid-column: 1 / 3; }
    .trainer-workspace .lessons-table td:nth-child(6) { grid-column: 3; }
    .trainer-workspace .lessons-table td:nth-child(7) { grid-column: 4; }
    .trainer-workspace .lessons-table td[data-label]::before { content: attr(data-label); color: var(--muted); font-size: .65rem; white-space: nowrap; overflow-wrap: normal; }
}
@media (max-width: 360px) {
    .trainer-workspace .app .app-nav > .nav-btn { font-size: .72rem; padding-inline: 2px; }
}
@media (max-height: 540px) {
    .trainer-workspace .app:has(.training-grid) { padding-block: 4px; gap: 4px; }
    .trainer-workspace .training-grid, .trainer-workspace #view-training.active { gap: 4px; }
    .trainer-workspace .train-main { padding: 8px; gap: 4px; }
    .trainer-workspace .practice-intro { font-size: 1.5rem; margin-bottom: 8px; }
    .trainer-workspace .landing-info { font-size: .8rem; margin: 4px 0; line-height: 1.4; }
    .trainer-workspace .lbl-prompt { font-size: 1.6rem; }
    .trainer-workspace .input-instruction, .trainer-workspace .session-stats { margin-block: 4px; font-size: .75rem; }
    .trainer-workspace .txt-history { max-height: 30px; }
    .trainer-workspace .pd-zones { height: 64px; }
}
@media (max-height: 700px) {
    .trainer-workspace:has(#btn-mode-key.active) .practice-intro { font-size: 1.4rem; margin-bottom: 6px; }
    .trainer-workspace:has(#btn-mode-key.active) .landing-info { font-size: .8rem; line-height: 1.4; margin: 6px 0; }
}