/* =================================================================
   TEACHER'S PLAN — v4 viewer (Review Lesson / Teach Lesson)

   Mobile first. One layout that adds panes as the screen allows:
     phone   → header, event rail, one column
     tablet  → + the lesson navigator down the left
     desktop → + the session record and lesson reference on the right

   Type scales from ONE number, --tp-fs, driven by the A A A control.
   Everything here is an em so the whole view grows together — the
   people reading this off a table at arm's length are not all young.
   ================================================================= */

.tp-v4 {
    --tp-fs: 1;
    font-size: calc(15px * var(--tp-fs));

    --tp-panel: #FFFFFF;
    --tp-panel-2: #F5F6FA;
    --tp-panel-3: #EDEFF5;
    --tp-rule: #E4E6EF;
    --tp-ink: #14161F;
    --tp-ink-soft: #565C70;
    --tp-ink-faint: #7F8598;

    --tp-teacher: #4F46E5;  --tp-teacher-wash: #EEEDFD;
    --tp-student: #0D8A80;  --tp-student-wash: #E1F4F1;
    --tp-note: #A8500A;     --tp-note-wash: #FDF2E2;
    --tp-do: #4E5766;       --tp-do-wash: #EEF0F4;
    --tp-skip: #7F8598;     --tp-skip-wash: #EEF0F4;

    --tp-serif: 'Iowan Old Style', 'Palatino Linotype', Palatino, 'Book Antiqua', Georgia, serif;

    display: flex;
    flex-direction: column;
    min-height: 0;

    /* The shell's header and nav sit above this. 170px is only a fallback —
       a shell that knows its own height should set --tp-app-chrome, and dvh
       keeps the action row above a phone's collapsing browser bar. */
    height: calc(100vh - var(--tp-app-chrome, 170px));
    height: calc(100dvh - var(--tp-app-chrome, 170px));
    min-height: 520px;
    background: var(--tp-panel);
    color: var(--tp-ink);
    border: 1px solid var(--tp-rule);
    border-radius: 12px;
    overflow: hidden;
    position: relative;
    outline: none;
}

.tp-v4[data-fs="large"]  { --tp-fs: 1.15; }
.tp-v4[data-fs="xlarge"] { --tp-fs: 1.32; }

[data-theme="dark"] .tp-v4 {
    --tp-panel: #171A21;
    --tp-panel-2: #1E222B;
    --tp-panel-3: #262B35;
    --tp-rule: #2E3441;
    --tp-ink: #F2F4F9;
    --tp-ink-soft: #A7AEC0;
    --tp-ink-faint: #7A8194;

    --tp-teacher: #9A93F7;  --tp-teacher-wash: #272150;
    --tp-student: #4BD3C2;  --tp-student-wash: #0E3B36;
    --tp-note: #EDAD57;     --tp-note-wash: #3D2C13;
    --tp-do: #A3AAB9;       --tp-do-wash: #252A35;
    --tp-skip: #8A91A2;     --tp-skip-wash: #252A35;
}

.tp-v4 * { box-sizing: border-box; }
.tp-v4 p { max-width: none; margin: 0 0 .5em; }
.tp-v4 p:last-child { margin-bottom: 0; }
.tp-v4 .tp-muted { color: var(--tp-ink-soft); font-size: .85em; }
.tp-v4 code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: .85em; background: var(--tp-panel-2);
    border: 1px solid var(--tp-rule); padding: 1px 5px; border-radius: 4px;
}
.tp-eyebrow {
    font-size: .68em; font-weight: 700; letter-spacing: .1em; text-transform: uppercase;
    color: var(--tp-ink-faint); margin: 0 0 .6em;
}
.tp-tok { color: var(--tp-teacher); font-weight: 600; }

/* ---------- header ---------- */
.tp-head {
    flex: 0 0 auto; display: flex; align-items: center; gap: .7em; flex-wrap: wrap;
    padding: .6em .9em; border-bottom: 1px solid var(--tp-rule); background: var(--tp-panel-2);
}
.tp-head-id { flex: 1 1 14em; min-width: 0; }
.tp-head-id h4 {
    margin: 0; font-family: var(--tp-serif); font-size: 1.1em; font-weight: 600; line-height: 1.25;
    display: flex; align-items: center; gap: .45em; flex-wrap: wrap;
}
.tp-head-id h4 em { font-style: normal; color: var(--tp-ink-faint); font-size: .8em; font-family: inherit; }
.tp-head-id .tp-sub { font-size: .72em; font-weight: 650; color: var(--tp-ink-faint); }
.tp-v4 .tp-theme-badge {
    font-size: .6em; font-weight: 700; letter-spacing: .06em; color: #fff;
    border-radius: 999px; padding: .2em .7em;
}

/* Mode tabs — the two big highlighted choices this screen is built around */
.tp-modebar {
    display: flex; gap: 3px; padding: 3px; order: 3; flex: 1 1 100%;
    background: var(--tp-panel-3); border-radius: .6em;
}
.tp-modebar button {
    flex: 1 1 0; font: inherit; font-size: .88em; font-weight: 700; cursor: pointer;
    border: 0; border-radius: .5em; background: transparent; color: var(--tp-ink-soft);
    padding: .6em .8em; white-space: nowrap;
    display: inline-flex; align-items: center; justify-content: center; gap: .45em;
}
.tp-modebar button[aria-selected="true"] { background: var(--tp-teacher); color: #fff; box-shadow: 0 1px 3px rgba(0,0,0,.18); }
.tp-modebar button:focus-visible { outline: 2px solid var(--tp-teacher); outline-offset: 2px; }

.tp-fsctl {
    display: flex; align-items: center; gap: .25em; padding: 2px;
    border: 1px solid var(--tp-rule); border-radius: .5em; background: var(--tp-panel);
}
.tp-fsctl button {
    font: inherit; font-weight: 700; border: 0; background: transparent; color: var(--tp-ink-soft);
    cursor: pointer; border-radius: .35em; min-height: 1.9em; padding: .2em .5em; line-height: 1;
}
.tp-fsctl button[aria-pressed="true"] { background: var(--tp-teacher); color: #fff; }
.tp-fsctl .tp-a1 { font-size: .72em; }
.tp-fsctl .tp-a2 { font-size: .88em; }
.tp-fsctl .tp-a3 { font-size: 1.02em; }

.tp-icon-btn {
    font: inherit; font-size: .9em; cursor: pointer; border: 1px solid var(--tp-rule);
    background: var(--tp-panel); color: var(--tp-ink-soft); border-radius: .5em;
    width: 2.2em; height: 2.2em; display: grid; place-items: center;
}
.tp-icon-btn:hover { color: var(--tp-ink); border-color: var(--tp-ink-faint); }

/* Whether the record reached the server, for as long as it hasn't. */
.tp-savestate {
    font-size: .7em; font-weight: 700; letter-spacing: .05em; border-radius: 999px;
    padding: .2em .6em; white-space: nowrap; border: 1px solid transparent;
}
.tp-savestate[data-state="idle"], .tp-savestate:empty { display: none; }
.tp-savestate[data-state="saving"] { color: var(--tp-ink-faint); }
.tp-savestate[data-state="saved"] { color: var(--tp-student); }
.tp-savestate[data-state="error"] {
    color: var(--tp-note); background: var(--tp-note-wash); border-color: var(--tp-note);
}

/* Announcements for screen readers — visually gone, never display:none. */
.tp-sr-live {
    position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0;
    overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap;
}

/* ---------- who is being taught ---------- */
.tp-stu-btn {
    font: inherit; font-size: .82em; font-weight: 650; cursor: pointer;
    border: 1px solid var(--tp-rule); background: var(--tp-panel); color: var(--tp-ink);
    border-radius: 999px; padding: .25em .7em .25em .25em;
    display: inline-flex; align-items: center; gap: .45em;
}
.tp-stu-btn:hover { border-color: var(--tp-teacher); }
.tp-stu-btn.tp-stu-none { color: var(--tp-ink-faint); padding-left: .7em; }
.tp-stu-self { font-size: .82em; font-weight: 650; color: var(--tp-ink-faint); }
.tp-stu-av {
    flex: 0 0 auto; width: 1.9em; height: 1.9em; border-radius: 50%; display: grid; place-items: center;
    background: var(--tp-teacher); color: #fff; font-size: .78em; font-weight: 700;
}
.tp-stu-nm { max-width: 11em; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tp-stu-caret { color: var(--tp-ink-faint); font-size: .8em; }
.tp-stu-row {
    width: 100%; font: inherit; font-size: .9em; text-align: left; cursor: pointer;
    border: 1px solid transparent; background: transparent; color: var(--tp-ink);
    border-radius: .55em; padding: .5em .6em; margin-bottom: .25em;
    display: flex; align-items: center; gap: .6em;
}
.tp-stu-row:hover { background: var(--tp-panel-2); }
.tp-stu-row.on { background: var(--tp-teacher-wash); border-color: var(--tp-teacher); }
.tp-stu-row-nm { flex: 1 1 auto; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tp-stu-row-n { font-size: .78em; color: var(--tp-ink-faint); font-variant-numeric: tabular-nums; }
.tp-stu-tick { color: var(--tp-teacher); font-weight: 700; }

/* ---------- event rail ---------- */
.tp-rail {
    flex: 0 0 auto; display: flex; gap: .3em; overflow-x: auto; padding: .5em .9em;
    border-bottom: 1px solid var(--tp-rule); background: var(--tp-panel);
    scrollbar-width: thin;
}
.tp-rail button {
    flex: 0 0 auto; font: inherit; font-size: .82em; font-weight: 650; cursor: pointer;
    border: 1px solid var(--tp-rule); background: var(--tp-panel-2); color: var(--tp-ink-soft);
    border-radius: 999px; padding: .35em .85em; white-space: nowrap;
    display: inline-flex; align-items: center; gap: .4em;
}
.tp-rail button[aria-selected="true"] {
    background: var(--tp-teacher); border-color: var(--tp-teacher); color: #fff;
}
.tp-rail .tp-n {
    font-size: .8em; font-weight: 700; opacity: .7; font-variant-numeric: tabular-nums;
}

/* ---------- panes ---------- */
.tp-panes { flex: 1 1 auto; display: flex; min-height: 0; }
.tp-pane-nav, .tp-pane-side { display: none; }
.tp-pane-main { flex: 1 1 auto; min-width: 0; display: flex; flex-direction: column; min-height: 0; }
.tp-body { flex: 1 1 auto; overflow-y: auto; min-height: 0; padding: .9em; }

.tp-pane-title {
    flex: 0 0 auto; font-size: .66em; font-weight: 700; letter-spacing: .09em; text-transform: uppercase;
    color: var(--tp-ink-faint); padding: .75em 1em .55em; border-bottom: 1px solid var(--tp-rule);
    display: flex; align-items: center; gap: .5em;
}
.tp-pane-title-sep { border-top: 1px solid var(--tp-rule); margin-top: .4em; }
.tp-pane-title .tp-cnt { margin-left: auto; font-variant-numeric: tabular-nums; }
.tp-pane-scroll { flex: 1 1 auto; overflow-y: auto; min-height: 0; }

/* ---------- lesson overview ---------- */
.tp-overview { display: flex; flex-direction: column; gap: 1em; }
.tp-ov-block { }
.tp-ov-block > .tp-eyebrow { display: flex; align-items: center; gap: .5em; }
.tp-ov-n {
    font-size: .9em; font-weight: 700; color: var(--tp-ink-faint); background: var(--tp-panel-2);
    border: 1px solid var(--tp-rule); border-radius: 999px; padding: 0 .45em; font-variant-numeric: tabular-nums;
}
.tp-ov-goals {
    background: var(--tp-teacher-wash); border: 1px solid var(--tp-teacher);
    border-radius: .7em; padding: .85em 1em;
}
.tp-ov-goals > .tp-eyebrow { color: var(--tp-teacher); }
.tp-ov-goals ul { margin: 0; padding-left: 1.1em; display: flex; flex-direction: column; gap: .4em; }
.tp-ov-goals li { font-size: .92em; line-height: 1.5; }
.tp-ov-setup { font-size: .92em; line-height: 1.5; }
.tp-ov-state { font-size: .85em; color: var(--tp-ink-soft); font-weight: 650; }
.tp-chips { display: flex; flex-wrap: wrap; gap: .3em; }
.tp-chip {
    font-size: .82em; font-weight: 600; border-radius: .35em; padding: .15em .5em;
    background: var(--tp-panel-2); border: 1px solid var(--tp-rule); color: var(--tp-ink);
}
.tp-chip-word { border-color: var(--tp-teacher); color: var(--tp-teacher); background: var(--tp-teacher-wash); }
.tp-chip-fn { color: var(--tp-ink-soft); }
.tp-chip-prop { border-color: var(--tp-note); color: var(--tp-note); background: var(--tp-note-wash); }
.tp-legend-row { display: flex; gap: .55em; align-items: baseline; margin-bottom: .3em; font-size: .85em; }
.tp-legend-row code { flex: 0 0 auto; color: var(--tp-teacher); }
.tp-ov-events { border-top: 1px solid var(--tp-rule); padding-top: .9em; }
.tp-ov-ev { display: flex; align-items: center; gap: .6em; padding: .35em 0; }
.tp-ov-ev-n {
    flex: 0 0 auto; width: 1.7em; height: 1.7em; border-radius: .4em; display: grid; place-items: center;
    background: var(--tp-panel-2); border: 1px solid var(--tp-rule); color: var(--tp-ink-soft);
    font-size: .78em; font-weight: 700;
}
.tp-ov-ev-nm { flex: 1 1 auto; min-width: 0; font-size: .92em; }
.tp-ov-ev-nm em { font-style: normal; color: var(--tp-ink-faint); font-size: .85em; }
.tp-ov-ev-c { flex: 0 0 auto; font-size: .78em; color: var(--tp-ink-faint); font-variant-numeric: tabular-nums; }

/* ---------- review list ---------- */
.tp-rv-summary { display: flex; gap: .4em; flex-wrap: wrap; margin-bottom: .9em; }
.tp-rv-desc { font-size: .9em; line-height: 1.5; margin-bottom: .9em; color: var(--tp-ink-soft); }
.tp-rv-setup { margin-bottom: .9em; }
.tp-rv-row { border: 1px solid var(--tp-rule); border-radius: .6em; margin-bottom: .5em; overflow: hidden; }
.tp-rv-btn {
    width: 100%; font: inherit; text-align: left; cursor: pointer; border: 0;
    background: var(--tp-panel); color: var(--tp-ink); padding: .6em .75em;
    display: flex; align-items: center; gap: .6em;
}
.tp-rv-btn:hover { background: var(--tp-panel-2); }
.tp-rv-btn:focus-visible { outline: 2px solid var(--tp-teacher); outline-offset: -2px; }
.tp-rv-status {
    flex: 0 0 auto; width: 1.6em; height: 1.6em; border-radius: 50%; display: grid; place-items: center;
    border: 1.5px solid var(--tp-rule); background: var(--tp-panel-2); color: var(--tp-ink-faint);
    font-size: .78em; font-weight: 700;
}
.tp-rv-status.learned { background: var(--tp-student); border-color: var(--tp-student); color: #fff; }
.tp-rv-status.help { background: var(--tp-note-wash); border-color: var(--tp-note); color: var(--tp-note); }
.tp-rv-status.skipped { background: var(--tp-skip-wash); border-color: var(--tp-skip); color: var(--tp-skip); }
.tp-rv-txt { flex: 1 1 auto; min-width: 0; }
.tp-rv-focus { display: block; font-size: .9em; font-weight: 650; line-height: 1.3; }
.tp-rv-peek {
    display: block; font-size: .8em; color: var(--tp-ink-faint); line-height: 1.35;
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.tp-rv-badges { flex: 0 0 auto; display: flex; gap: .25em; flex-wrap: wrap; max-width: 38%; justify-content: flex-end; }
.tp-rv-badge {
    font-size: .68em; font-weight: 700; border-radius: 999px; padding: .1em .5em;
    border: 1px solid var(--tp-rule); color: var(--tp-ink-faint); white-space: nowrap;
}
.tp-rv-badge.f { border-color: var(--tp-teacher); color: var(--tp-teacher); }
.tp-rv-badge.n { border-color: var(--tp-note); color: var(--tp-note); }
.tp-rv-detail { display: none; padding: .1em .75em .75em; border-top: 1px solid var(--tp-rule); }
.tp-rv-row[data-open="true"] .tp-rv-detail { display: block; }

/* ---------- the set body, shared by both modes ---------- */
.tp-lane { margin-bottom: .7em; }
.tp-lane-label {
    font-size: .66em; font-weight: 800; letter-spacing: .08em; text-transform: uppercase;
    margin: .6em 0 .25em;
}
.tp-l-teacher { color: var(--tp-teacher); }
.tp-l-student { color: var(--tp-student); }
.tp-l-do { color: var(--tp-do); }
.tp-l-note { color: var(--tp-note); }

/* Spoken lines get the display face and real size — the teacher is
   reading these aloud off the screen, often at arm's length. Stage
   directions stay small and quiet, because nobody says them. */
.tp-v4 .tp-activity-teacher,
.tp-v4 .tp-activity-response {
    display: block; padding: 0; margin: 0 0 .3em; background: none; border-radius: 0;
}
.tp-v4 .tp-teacher-icon,
.tp-v4 .tp-response-icon { display: none; }
.tp-v4 .tp-teacher-text,
.tp-v4 .tp-response-text {
    font-family: var(--tp-serif); font-size: 1.12em; line-height: 1.4; font-weight: 400;
}
.tp-v4 .tp-teacher-text { color: var(--tp-ink); }
.tp-v4 .tp-response-text { color: var(--tp-student); }
/* Authors can put line breaks in a plan; the teacher has to see them. */
.tp-v4 .tp-teacher-text,
.tp-v4 .tp-response-text,
.tp-v4 .tp-action-text,
.tp-v4 .tp-note-text,
.tp-setup-card p,
.tp-ov-setup,
.tp-rv-desc { white-space: pre-wrap; }
.tp-v4 .tp-activity-teacher + .tp-activity-teacher,
.tp-v4 .tp-activity-response + .tp-activity-response {
    padding-top: .3em; border-top: 1px dashed var(--tp-rule);
}

.tp-v4 .tp-activity-action {
    display: flex; align-items: flex-start; gap: .5em; margin-bottom: .3em;
    padding: .4em .6em; background: var(--tp-do-wash); border-radius: .45em;
}
.tp-v4 .tp-action-icon {
    width: 1.5em; height: 1.5em; flex: 0 0 auto; background: var(--tp-panel);
    color: var(--tp-do); font-size: .78em;
}
.tp-v4 .tp-action-text { font-size: .88em; line-height: 1.45; color: var(--tp-ink-soft); }

.tp-v4 .tp-activity-note {
    display: flex; gap: .5em; margin-bottom: .7em; padding: .6em .75em;
    background: var(--tp-note-wash); border: 1px solid var(--tp-note); border-left-width: 3px;
    border-radius: .5em;
}
.tp-v4 .tp-note-icon { color: var(--tp-note); font-size: .9em; flex: 0 0 auto; }
.tp-v4 .tp-note-text { font-size: .86em; line-height: 1.5; color: var(--tp-ink); }
.tp-v4 .tp-note-text b {
    font-size: .82em; font-weight: 800; letter-spacing: .07em; text-transform: uppercase;
    color: var(--tp-note);
}

.tp-setup-card {
    background: var(--tp-do-wash); border: 1px solid var(--tp-rule); border-left: 3px solid var(--tp-do);
    border-radius: .55em; padding: .65em .8em;
}
.tp-setup-card p { font-size: .88em; line-height: 1.5; }
.tp-setup-card-lg { max-width: 34em; margin: 0 auto; text-align: left; }

/* ---------- teach mode ---------- */
.tp-tm-banner {
    flex: 0 0 auto; display: flex; align-items: center; gap: .5em; padding: .55em .9em;
    background: var(--tp-note-wash); color: var(--tp-note);
    font-size: .82em; font-weight: 700; border-bottom: 1px solid var(--tp-rule);
}
.tp-tm-stage { flex: 1 1 auto; overflow-y: auto; min-height: 0; padding: 1em .9em; }
.tp-tm-inner { max-width: 44em; margin: 0 auto; }
.tp-tm-setlabel {
    display: flex; align-items: baseline; gap: .55em; flex-wrap: wrap;
    margin-bottom: .9em; padding-bottom: .7em; border-bottom: 1px solid var(--tp-rule);
}
.tp-tm-setlabel .tp-k {
    font-size: .66em; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
    color: var(--tp-ink-faint);
}
.tp-tm-setlabel h5 {
    margin: 0; flex: 1 1 100%; font-family: var(--tp-serif);
    font-size: 1.25em; font-weight: 600; line-height: 1.25;
}
.tp-tm-status {
    font-size: .72em; font-weight: 700; border-radius: 999px; padding: .15em .6em; border: 1px solid;
}
.tp-tm-status.learned { background: var(--tp-student-wash); border-color: var(--tp-student); color: var(--tp-student); }
.tp-tm-status.help { background: var(--tp-note-wash); border-color: var(--tp-note); color: var(--tp-note); }
.tp-tm-status.skipped { background: var(--tp-skip-wash); border-color: var(--tp-skip); color: var(--tp-skip); }
.tp-tm-again { font-size: .72em; font-weight: 700; color: var(--tp-ink-faint); }

.tp-tm-meter { flex: 0 0 auto; height: 3px; background: var(--tp-panel-3); }
.tp-tm-meter div { height: 100%; background: var(--tp-student); transition: width .25s ease; }

.tp-tm-actions {
    flex: 0 0 auto; display: grid; gap: .4em; padding: .7em .9em;
    grid-template-columns: 2.4em 1fr 1.25fr 1.25fr 2.4em;
    border-top: 1px solid var(--tp-rule); background: var(--tp-panel-2);
}
.tp-tm-actions button {
    font: inherit; font-size: .84em; font-weight: 700; cursor: pointer;
    min-height: 3em; border-radius: .6em; border: 1.5px solid; padding: .3em;
    display: inline-flex; align-items: center; justify-content: center; gap: .35em;
}
.tp-tm-actions button:disabled { opacity: .35; cursor: not-allowed; }
.tp-tm-actions kbd {
    display: none; font-size: .8em; font-family: inherit; font-weight: 700;
    border: 1px solid currentColor; border-radius: 3px; padding: 0 .3em; opacity: .7;
}
.tp-btn-nav { background: var(--tp-panel); border-color: var(--tp-rule); color: var(--tp-ink-faint); font-size: 1.1em !important; }
.tp-btn-skip { background: var(--tp-panel); border-color: var(--tp-rule); color: var(--tp-ink-soft); }
.tp-btn-help { background: var(--tp-note-wash); border-color: var(--tp-note); color: var(--tp-note); }
.tp-btn-learned { background: var(--tp-student); border-color: var(--tp-student); color: #fff; }
.tp-tm-actions button:focus-visible { outline: 2px solid var(--tp-teacher); outline-offset: 2px; }
.tp-tm-pos {
    flex: 0 0 auto; padding: 0 .9em .7em; font-size: .74em; color: var(--tp-ink-faint);
    text-align: center; background: var(--tp-panel-2); font-variant-numeric: tabular-nums;
}

/* ---------- gates ---------- */
.tp-tm-gate {
    flex: 1 1 auto; overflow-y: auto; min-height: 0; padding: 2em 1.2em;
    text-align: center; display: flex; flex-direction: column; align-items: center; justify-content: center;
}
.tp-glyph { font-size: 2em; color: var(--tp-teacher); margin-bottom: .35em; }
.tp-tm-gate h5 { margin: 0 0 .35em; font-family: var(--tp-serif); font-size: 1.35em; font-weight: 600; }
.tp-tm-gate > p { font-size: .9em; line-height: 1.55; color: var(--tp-ink-soft); max-width: 40ch; }
.tp-gate-sub { font-size: .85em; color: var(--tp-ink-faint); margin-bottom: 1em; }
.tp-gate-note { font-size: .8em; color: var(--tp-ink-faint); margin-top: 1em; max-width: 42ch; }
.tp-gate-tally { display: flex; gap: .4em; flex-wrap: wrap; justify-content: center; margin: 1em 0; }
.tp-gate-pill {
    font-size: .78em; font-weight: 700; border-radius: 999px; padding: .2em .7em; border: 1px solid;
}
.tp-gp-learned { background: var(--tp-student-wash); border-color: var(--tp-student); color: var(--tp-student); }
.tp-gp-help { background: var(--tp-note-wash); border-color: var(--tp-note); color: var(--tp-note); }
.tp-gp-skip { background: var(--tp-skip-wash); border-color: var(--tp-skip); color: var(--tp-skip); }
.tp-gate-btns { display: flex; gap: .5em; flex-wrap: wrap; justify-content: center; margin-top: .5em; }
.tp-gate-btns button {
    font: inherit; font-size: .88em; font-weight: 700; cursor: pointer; min-height: 2.8em;
    padding: .5em 1.2em; border-radius: .6em; border: 1px solid var(--tp-rule);
    background: var(--tp-panel); color: var(--tp-ink);
}
.tp-gate-btns .tp-primary { background: var(--tp-teacher); border-color: var(--tp-teacher); color: #fff; }
.tp-gate-btns button:focus-visible { outline: 2px solid var(--tp-teacher); outline-offset: 2px; }

.tp-gate-scroll { flex: 1 1 auto; overflow-y: auto; min-height: 0; padding: 1.2em .9em 2em; }
.tp-gate-lead { text-align: center; margin-bottom: 1.4em; }
.tp-gate-lead h5 { margin: 0 0 .2em; font-family: var(--tp-serif); font-size: 1.35em; font-weight: 600; }
.tp-gate-foot { margin-top: 1.6em; display: flex; justify-content: center; gap: .6em; flex-wrap: wrap; }
.tp-gate-foot button {
    font: inherit; font-size: .95em; font-weight: 700; cursor: pointer; min-height: 3em;
    padding: .6em 1.6em; border-radius: .6em; border: 1px solid var(--tp-teacher);
    background: var(--tp-teacher); color: #fff;
}
.tp-gate-foot button:not(.tp-primary) {
    background: var(--tp-panel); color: var(--tp-ink); border-color: var(--tp-rule);
}
.tp-gate-done {
    font-size: .86em; line-height: 1.5; color: var(--tp-student);
    background: var(--tp-student-wash); border: 1px solid var(--tp-student);
    border-radius: .5em; padding: .5em .8em; max-width: 46ch; margin: 0 auto;
}
.tp-gate-done i { margin-right: .4em; }

/* ---------- navigator ---------- */
.tp-nav-ev { border-bottom: 1px solid var(--tp-rule); }
.tp-nav-ev-head {
    width: 100%; font: inherit; text-align: left; cursor: pointer; border: 0; background: transparent;
    color: var(--tp-ink); padding: .6em .8em; display: flex; align-items: center; gap: .55em;
}
.tp-nav-ev-head:hover { background: var(--tp-panel-3); }
.tp-nav-ev[data-active="true"] > .tp-nav-ev-head { background: var(--tp-teacher-wash); }
.tp-nav-idx {
    flex: 0 0 auto; width: 1.5em; height: 1.5em; border-radius: .4em; display: grid; place-items: center;
    background: var(--tp-panel); border: 1px solid var(--tp-rule); color: var(--tp-ink-soft);
    font-size: .74em; font-weight: 700;
}
.tp-nav-ev[data-active="true"] .tp-nav-idx { background: var(--tp-teacher); border-color: var(--tp-teacher); color: #fff; }
.tp-nav-ev-txt { flex: 1 1 auto; min-width: 0; }
.tp-nav-ev-txt b { display: block; font-size: .84em; font-weight: 650; line-height: 1.3; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tp-nav-ev-txt span { display: block; font-size: .72em; color: var(--tp-ink-faint); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tp-nav-prog { flex: 0 0 auto; display: flex; gap: 2px; }
.tp-nav-prog i { width: 4px; height: 12px; border-radius: 2px; background: var(--tp-panel-3); display: block; }
.tp-nav-prog i.learned { background: var(--tp-student); }
.tp-nav-prog i.help { background: var(--tp-note); }
.tp-nav-prog i.skipped { background: var(--tp-skip); }
.tp-nav-sets { display: none; padding-bottom: .35em; }
.tp-nav-ev[data-open="true"] .tp-nav-sets { display: block; }
.tp-nav-set {
    width: 100%; font: inherit; font-size: .8em; text-align: left; cursor: pointer; border: 0;
    border-left: 3px solid transparent; background: transparent; color: var(--tp-ink-soft);
    padding: .35em .8em .35em 1.2em; display: flex; align-items: center; gap: .45em;
}
.tp-nav-set:hover { background: var(--tp-panel-3); color: var(--tp-ink); }
.tp-nav-set[data-current="true"] {
    background: var(--tp-panel); color: var(--tp-ink); font-weight: 650; border-left-color: var(--tp-teacher);
}
.tp-nav-dot {
    flex: 0 0 auto; width: 1.3em; height: 1.3em; border-radius: 50%; display: grid; place-items: center;
    border: 1px solid var(--tp-rule); background: var(--tp-panel); color: var(--tp-ink-faint);
    font-size: .72em; font-weight: 700;
}
.tp-nav-dot.learned { background: var(--tp-student); border-color: var(--tp-student); color: #fff; }
.tp-nav-dot.help { background: var(--tp-note-wash); border-color: var(--tp-note); color: var(--tp-note); }
.tp-nav-dot.skipped { background: var(--tp-skip-wash); border-color: var(--tp-skip); color: var(--tp-skip); }
.tp-nav-nm { flex: 1 1 auto; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ---------- session record ---------- */
.tp-side-tally { flex: 0 0 auto; display: grid; grid-template-columns: repeat(4, 1fr); border-bottom: 1px solid var(--tp-rule); }
.tp-side-tally > div { padding: .6em .3em; text-align: center; border-right: 1px solid var(--tp-rule); }
.tp-side-tally > div:last-child { border-right: 0; }
.tp-side-tally b { display: block; font-size: 1.15em; font-weight: 700; font-variant-numeric: tabular-nums; }
.tp-side-tally span { font-size: .64em; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--tp-ink-faint); }
.tp-t-learned b { color: var(--tp-student); }
.tp-t-help b { color: var(--tp-note); }
.tp-t-skip b { color: var(--tp-skip); }
.tp-t-open b { color: var(--tp-ink-faint); }

.tp-rec-ev {
    font-size: .66em; font-weight: 800; letter-spacing: .07em; text-transform: uppercase;
    color: var(--tp-ink-faint); padding: .8em 1em .3em;
}
.tp-rec-row { display: flex; align-items: center; gap: .5em; padding: .3em 1em; font-size: .82em; }
.tp-rec-nm { flex: 1 1 auto; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tp-rec-att { flex: 0 0 auto; font-size: .8em; font-weight: 700; color: var(--tp-ink-faint); }
.tp-pill {
    flex: 0 0 auto; font-size: .72em; font-weight: 700; border-radius: 999px;
    padding: .1em .55em; border: 1px solid var(--tp-rule); color: var(--tp-ink-faint); white-space: nowrap;
}
.tp-pill.learned { background: var(--tp-student-wash); border-color: var(--tp-student); color: var(--tp-student); }
.tp-pill.help { background: var(--tp-note-wash); border-color: var(--tp-note); color: var(--tp-note); }
.tp-pill.skipped { background: var(--tp-skip-wash); border-color: var(--tp-skip); color: var(--tp-skip); }
.tp-ref-wrap { padding: .9em 1em 1.5em; }
.tp-ref-group { margin-bottom: 1.1em; font-size: .95em; }

/* ---------- bottom sheet (roster / reference) ---------- */
.tp-sheet {
    position: absolute; inset: 0; z-index: 40; background: rgba(15, 17, 22, .45);
    display: none; align-items: flex-end; justify-content: center;
}
.tp-sheet[data-open="true"] { display: flex; }
.tp-sheet-panel {
    width: 100%; max-width: 34em; max-height: 82%; display: flex; flex-direction: column;
    background: var(--tp-panel); border-radius: 1em 1em 0 0; padding: .5em 1.1em 1.1em;
}
.tp-sheet-grab { width: 2.5em; height: 4px; border-radius: 2px; background: var(--tp-rule); margin: .2em auto .8em; }
.tp-sheet-body { flex: 1 1 auto; overflow-y: auto; min-height: 0; }
.tp-sheet-close {
    flex: 0 0 auto; margin-top: .8em; font: inherit; font-size: .88em; font-weight: 700; cursor: pointer;
    min-height: 2.8em; border-radius: .6em; border: 1px solid var(--tp-rule);
    background: var(--tp-panel-2); color: var(--tp-ink);
}

/* ---------- tablet: the lesson navigator appears ---------- */
@media (min-width: 780px) {
    .tp-modebar { order: 0; flex: 0 0 auto; }
    .tp-rail { display: none; }
    .tp-pane-nav {
        display: flex; flex-direction: column; min-height: 0;
        flex: 0 0 clamp(200px, 22vw, 280px);
        border-right: 1px solid var(--tp-rule); background: var(--tp-panel-2);
    }
    .tp-body, .tp-tm-stage, .tp-gate-scroll { padding-left: 1.4em; padding-right: 1.4em; }
    .tp-tm-actions { grid-template-columns: 2.6em 1fr 1.3fr 1.3fr 2.6em; }
}

/* Below 1180px the session-record pane is gone, so the running tally rides
   above the main column instead — a teacher should never have to guess how
   much of the lesson is still open. */
.tp-compact-tally { flex: 0 0 auto; }
.tp-compact-tally .tp-side-tally { border-bottom: 1px solid var(--tp-rule); }

/* ---------- desktop: the session record appears ---------- */
@media (min-width: 1180px) {
    .tp-pane-side {
        display: flex; flex-direction: column; min-height: 0;
        flex: 0 0 clamp(240px, 21vw, 330px);
        border-left: 1px solid var(--tp-rule); background: var(--tp-panel-2);
    }
    .tp-icon-btn { display: none; }
    .tp-compact-tally { display: none; }
    .tp-tm-actions kbd { display: inline-block; }
}

@media (prefers-reduced-motion: reduce) {
    .tp-v4 * { transition: none !important; animation: none !important; }
}