:root {
  --bg: #f7f5f0;
  --surface: #ffffff;
  --surface-2: #f1eee7;
  --text: #1f1b16;
  --muted: #6b645a;
  --line: #e2ddd3;
  --brand: #8a5a00;
  --brand-soft: #f6ead0;
  --on-brand: #ffffff;
  --ok: #1d7a46;
  --ok-soft: #e3f3e9;
  --bad: #b3261e;
  --bad-soft: #fbe7e5;
  --wait: #8a8378;
  --code-bg: #faf8f3;
  --radius: 10px;
  --mono: ui-monospace, "Cascadia Code", "Cascadia Mono", Consolas, "Liberation Mono", monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #16130f;
    --surface: #1f1b16;
    --surface-2: #27221c;
    --text: #f3efe8;
    --muted: #a79f93;
    --line: #3a332b;
    --brand: #e0b45a;
    --brand-soft: #3a2f1a;
    --on-brand: #16130f;
    --ok: #5cc98b;
    --ok-soft: #173325;
    --bad: #ff8a80;
    --bad-soft: #3b1d1b;
    --wait: #8a8378;
    --code-bg: #1a1713;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #16130f;
  --surface: #1f1b16;
  --surface-2: #27221c;
  --text: #f3efe8;
  --muted: #a79f93;
  --line: #3a332b;
  --brand: #e0b45a;
  --brand-soft: #3a2f1a;
  --on-brand: #16130f;
  --ok: #5cc98b;
  --ok-soft: #173325;
  --bad: #ff8a80;
  --bad-soft: #3b1d1b;
  --code-bg: #1a1713;
  color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

code { font-family: var(--mono); font-size: 0.9em; background: var(--surface-2); padding: 0.05em 0.3em; border-radius: 4px; }
a { color: var(--brand); }
.muted { color: var(--muted); }
.wrap { max-width: 1180px; margin: 0 auto; padding: 24px 16px 80px; }

/* -- bar */
.bar { background: var(--surface); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 5; }
.bar-inner { max-width: 1180px; margin: 0 auto; padding: 10px 16px; display: flex; gap: 12px; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.brand { font-weight: 700; letter-spacing: 0.02em; color: var(--brand); }
.brand-sub { color: var(--text); font-weight: 500; }
.viewing { display: flex; gap: 8px; align-items: center; font-size: 14px; flex-wrap: wrap; }
.viewing input { width: 9em; font: inherit; padding: 4px 8px; border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--text); }
.chip { font-size: 12px; font-weight: 600; padding: 2px 8px; border-radius: 99px; background: var(--brand-soft); color: var(--brand); }

/* -- layout */
.layout { display: grid; grid-template-columns: 260px minmax(0, 1fr); gap: 32px; align-items: start; }
@media (max-width: 900px) { .layout { grid-template-columns: minmax(0, 1fr); } .path { order: 2; } }

.path { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; position: sticky; top: 72px; }
@media (max-width: 900px) { .path { position: static; } }
.path h2 { font-size: 14px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); margin: 0 0 10px; }
.path ol { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; max-height: 70vh; overflow: auto; }
.path li { display: grid; grid-template-columns: 22px 1fr auto; gap: 8px; padding: 6px 8px; border-radius: 6px; font-size: 14px; color: var(--muted); }
.path li.now { background: var(--brand-soft); color: var(--text); font-weight: 600; }
.path .n { font-variant-numeric: tabular-nums; }
.path .min { font-size: 12px; font-variant-numeric: tabular-nums; }

.eyebrow { font-size: 13px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--brand); font-weight: 700; margin: 0; }
h1 { font-size: clamp(26px, 3.4vw, 36px); line-height: 1.15; margin: 6px 0 8px; }
.steps-nav { display: flex; gap: 8px; flex-wrap: wrap; margin: 12px 0 28px; padding: 0; list-style: none; font-size: 14px; }
.steps-nav li { padding: 4px 12px; border-radius: 99px; border: 1px solid var(--line); background: var(--surface); }
.steps-nav li.done { border-color: var(--ok); color: var(--ok); }

.step { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; margin-bottom: 24px; }
.step > h2 { margin: 0 0 4px; font-size: 21px; }
.step > .lead { margin: 0 0 16px; color: var(--muted); }

/* -- watch */
.video { position: relative; aspect-ratio: 16 / 9; background: #000; border-radius: 8px; overflow: hidden; }
.video iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.meta { font-size: 14px; color: var(--muted); margin: 10px 0 0; }
.skips { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0 0; padding: 0; list-style: none; font-size: 13px; }
.skips li { background: var(--surface-2); border-radius: 6px; padding: 4px 10px; }
.notes { margin: 16px 0 0; padding: 14px 16px 14px 34px; background: var(--brand-soft); border-radius: 8px; }
.notes li + li { margin-top: 6px; }

/* -- platform */
.platform { margin-top: 16px; border-top: 1px solid var(--line); padding-top: 14px; }
.os-toggle { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; font-size: 14px; }
.os-toggle span { color: var(--muted); margin-right: 4px; }
.os-toggle button { padding: 4px 14px; border: 1px solid var(--line); background: var(--surface); color: var(--text); font-size: 14px; }
.os-toggle button[aria-pressed="true"] { background: var(--brand); border-color: var(--brand); color: var(--on-brand); font-weight: 600; }
.os-notes { margin: 12px 0 0; padding-left: 22px; }
.os-notes li + li { margin-top: 6px; }
details.keys { margin-top: 12px; border: 1px solid var(--line); border-radius: 8px; padding: 10px 14px; }
details.keys summary { cursor: pointer; font-weight: 600; }
details.keys p { margin: 8px 0; font-size: 14px; }
details.keys table { border-collapse: collapse; width: 100%; font-size: 14px; margin-top: 6px; }
details.keys th { text-align: left; font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); padding: 4px 8px 4px 0; }
details.keys td { padding: 6px 8px 6px 0; border-top: 1px solid var(--line); vertical-align: top; }
details.keys td.at { font-variant-numeric: tabular-nums; color: var(--muted); white-space: nowrap; }
kbd {
  font-family: var(--mono); font-size: 0.85em; padding: 1px 6px; border-radius: 5px; white-space: nowrap;
  border: 1px solid var(--line); border-bottom-width: 2px; background: var(--surface-2); color: var(--text);
}

/* -- tasks */
.task { border-top: 1px solid var(--line); padding-top: 20px; margin-top: 20px; }
.task:first-of-type { border-top: 0; margin-top: 0; padding-top: 0; }
.task-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.task-head h3 { margin: 0; font-size: 18px; }
.badge { font-size: 12px; font-weight: 700; padding: 2px 10px; border-radius: 99px; background: var(--ok-soft); color: var(--ok); }
.brief p { margin: 8px 0; }
.brief ul { margin: 6px 0 12px; padding-left: 22px; }
.work { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 12px; }
@media (max-width: 700px) { .work { grid-template-columns: 1fr; } }
.pane { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.pane-label { font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); }
textarea.code {
  font: 14px/1.5 var(--mono); tab-size: 2; min-height: 300px; resize: vertical; width: 100%;
  white-space: pre; overflow: auto;
  padding: 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--code-bg); color: var(--text);
}
textarea.code:focus { outline: 2px solid var(--brand); outline-offset: 1px; }
.preview { width: 100%; min-height: 300px; height: 100%; border: 1px solid var(--line); border-radius: 8px; background: #fff; }
.actions { display: flex; gap: 10px; margin-top: 12px; flex-wrap: wrap; }

button { font: inherit; cursor: pointer; border-radius: 8px; padding: 8px 16px; border: 1px solid transparent; }
button.primary { background: var(--brand); color: var(--on-brand); font-weight: 600; }
button.ghost { background: transparent; border-color: var(--line); color: var(--text); }
button.small { padding: 4px 10px; font-size: 14px; }
button:disabled { opacity: 0.45; cursor: not-allowed; }
button:focus-visible, input:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }

.result { margin-top: 14px; }
.summary { font-weight: 600; margin: 0 0 8px; }
.summary.ok { color: var(--ok); }
.checks { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.checks li { display: grid; grid-template-columns: 22px 1fr; gap: 8px; padding: 8px 10px; border-radius: 8px; font-size: 15px; }
.checks li.pass { background: var(--ok-soft); }
.checks li.fail { background: var(--bad-soft); }
.checks li.blocked { background: var(--surface-2); color: var(--muted); }
.checks .mark { font-weight: 700; text-align: center; }
.checks li.pass .mark { color: var(--ok); }
.checks li.fail .mark { color: var(--bad); }
.checks .what { font-weight: 600; display: block; }
.checks .why { display: block; }
.checks li.pass .why { color: var(--muted); font-size: 14px; }
.hint { margin: 12px 0 0; padding: 10px 14px; border-left: 3px solid var(--brand); background: var(--brand-soft); border-radius: 0 8px 8px 0; }

/* -- questions */
.q { border: 1px solid var(--line); border-radius: 8px; padding: 12px 16px; margin: 12px 0 0; }
.q legend { font-weight: 600; padding: 0 6px; }
.q label { display: flex; gap: 8px; align-items: center; padding: 4px 0; }
.explain { margin: 8px 0 0; padding: 8px 12px; border-radius: 8px; font-size: 15px; }
.explain.ok { background: var(--ok-soft); }
.explain.bad { background: var(--bad-soft); }

/* -- teach back */
.steps-list { padding-left: 22px; }
.steps-list li + li { margin-top: 6px; }
.rules { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; margin: 12px 0; font-size: 14px; }
.rules li { background: var(--surface-2); border-radius: 6px; padding: 4px 10px; }
details.listen { margin: 12px 0; border: 1px solid var(--line); border-radius: 8px; padding: 10px 14px; }
details.listen summary { cursor: pointer; font-weight: 600; }
.howto { font-size: 15px; color: var(--muted); }
.send { display: grid; gap: 8px; margin-top: 14px; max-width: 560px; }
.send input { font: inherit; padding: 8px 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); color: var(--text); }
.gate { font-size: 14px; color: var(--muted); margin: 0; }
.sent { padding: 12px 14px; border-radius: 8px; background: var(--ok-soft); }

pre#selftest { white-space: pre-wrap; font: 13px/1.5 var(--mono); }

/* ===================================================== live site additions */

.wrap.wide { max-width: 1400px; }
.small-print { font-size: 12px; }
.good { color: var(--ok); }
.bad { color: var(--bad); }

/* -- signed-in bar */
.who { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; font-size: 14px; }
.who a { font-weight: 600; }
.sync { margin-top: 8px; margin-bottom: -8px; font-size: 14px; color: var(--muted); padding-top: 0; padding-bottom: 0; }

/* -- sign in */
.login { max-width: 420px; margin: 48px auto; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; }
.login h1 { margin-top: 0; }
.login-form { display: grid; gap: 14px; }
.login-form label, .pw-form label, .add-person label, .review label { display: grid; gap: 6px; font-weight: 600; font-size: 14px; }
.login-form input, .pw-form input, .add-person input, .add-person select, .review textarea {
  font: inherit; font-weight: 400; padding: 9px 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); color: var(--text);
}
.login-note, .pw-note, .add-note, .review-note { margin: 0; min-height: 1.5em; font-size: 14px; color: var(--muted); }

/* -- dialog */
.dialog { border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); color: var(--text); padding: 24px; width: min(420px, calc(100vw - 32px)); }
.dialog::backdrop { background: rgb(0 0 0 / 0.45); }
.pw-form { display: grid; gap: 12px; }
.pw-form h2 { margin: 0 0 4px; font-size: 20px; }

/* -- teach-back status for the student */
.sent.ok { background: var(--ok-soft); }
.sent.redo { background: var(--bad-soft); }
.feedback { margin: 8px 0 0; padding: 8px 12px; border-left: 3px solid var(--brand); background: var(--surface); border-radius: 0 6px 6px 0; white-space: pre-wrap; }
#teachback-status .sent { margin-top: 14px; }

/* -- admin */
.admin-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; flex-wrap: wrap; }
.admin-head h1 { margin: 0 0 4px; }
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin: 16px 0 20px; flex-wrap: wrap; }
.tab { background: none; border: 0; border-bottom: 3px solid transparent; border-radius: 0; padding: 10px 14px; color: var(--muted); font-weight: 600; }
.tab[aria-selected="true"] { color: var(--text); border-bottom-color: var(--brand); }
.notice { background: var(--brand-soft); border-radius: 8px; padding: 12px 16px; margin-bottom: 16px; }
.creds { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; font: 14px/1.5 var(--mono); white-space: pre-wrap; margin: 10px 0; }

.table-wrap { overflow-x: auto; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
.class-table, .people-table { border-collapse: collapse; width: 100%; font-size: 14px; }
.class-table th, .people-table th { text-align: left; font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); padding: 10px 12px; border-bottom: 1px solid var(--line); white-space: nowrap; }
.class-table td, .people-table td { padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.class-table tr.is-open > td { background: var(--brand-soft); }
.class-table tr.paused td { opacity: 0.6; }
.class-table .sub { font-size: 12px; color: var(--muted); margin-top: 2px; }
.linkish { background: none; border: 0; padding: 0; color: var(--brand); font-weight: 600; text-align: left; }
.linkish:hover { text-decoration: underline; }
.mini { display: flex; flex-wrap: wrap; gap: 6px 12px; align-items: center; }
.chip { display: inline-block; font-size: 12px; font-weight: 600; padding: 1px 8px; border-radius: 99px; background: var(--surface-2); color: var(--muted); }
.chip.ok { background: var(--ok-soft); color: var(--ok); }
.chip.warn { background: var(--bad-soft); color: var(--bad); }
.chip.wait { background: var(--brand-soft); color: var(--brand); }
.row-actions { white-space: nowrap; text-align: right; }
.row-actions button + button { margin-left: 6px; }

.detail-row > td { background: var(--bg); }
.person-detail { padding: 8px 4px; }
.person-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.person-detail h3 { font-size: 15px; margin: 18px 0 8px; }
.timeline { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
.timeline > li { display: grid; grid-template-columns: 130px 1fr; gap: 12px; padding: 6px 8px; border-radius: 6px; }
.timeline > li:nth-child(odd) { background: var(--surface); }
.timeline time { color: var(--muted); font-variant-numeric: tabular-nums; white-space: nowrap; }
@media (max-width: 700px) { .timeline > li { grid-template-columns: 1fr; gap: 2px; } }
.tag { font: 12px var(--mono); background: var(--surface-2); border-radius: 4px; padding: 0 5px; color: var(--muted); }
.failing { margin: 4px 0 0; padding-left: 20px; color: var(--bad); }
.code-peek summary { cursor: pointer; color: var(--brand); font-size: 13px; margin-top: 4px; }
.code-peek pre { max-height: 320px; overflow: auto; background: var(--code-bg); border: 1px solid var(--line); border-radius: 6px; padding: 10px; font: 13px/1.45 var(--mono); }

.tb-card { display: grid; grid-template-columns: minmax(260px, 420px) 1fr; gap: 16px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; margin-bottom: 14px; }
@media (max-width: 800px) { .tb-card { grid-template-columns: 1fr; } }
.tb-video { position: relative; aspect-ratio: 16 / 9; background: #000; border-radius: 8px; overflow: hidden; }
.tb-video iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.tb-body p { margin: 0 0 8px; }
.review { display: grid; gap: 8px; }

.add-person { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; margin-bottom: 18px; display: grid; gap: 12px; }
.add-person h2 { margin: 0; font-size: 18px; }
.add-person .grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; }

/* -- photos and the profile dialog */
.avatar { display: inline-grid; place-items: center; border-radius: 50%; object-fit: cover; flex: none; background: var(--brand-soft); color: var(--brand); font-weight: 700; vertical-align: middle; }
.avatar-28 { width: 28px; height: 28px; font-size: 11px; }
.avatar-40 { width: 40px; height: 40px; font-size: 14px; }
.avatar-72 { width: 72px; height: 72px; font-size: 24px; }
#who-avatar { display: inline-flex; }
.person-cell { display: flex; gap: 10px; align-items: flex-start; }
.person-cell .avatar { margin-top: 2px; }
.tb-who .avatar { margin-right: 4px; }

.dialog.profile { width: min(480px, calc(100vw - 32px)); }
.profile-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.profile-head h2 { margin: 0; font-size: 20px; }
.profile section { border-top: 1px solid var(--line); margin-top: 16px; padding-top: 14px; }
.profile h3 { margin: 0 0 10px; font-size: 15px; }
.photo-row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.file-button { display: inline-block; cursor: pointer; border: 1px solid var(--line); border-radius: 8px; padding: 4px 10px; font-size: 14px; }
.file-button:focus-within { outline: 2px solid var(--brand); outline-offset: 2px; }
.inline-form { display: flex; gap: 8px; flex-wrap: wrap; }
.inline-form input { flex: 1 1 180px; font: inherit; padding: 6px 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); color: var(--text); }
.profile .note { margin: 8px 0 0; font-size: 14px; min-height: 1.3em; }

/* -- automatic review notes */
.auto { background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 10px 14px; margin: 10px 0; font-size: 14px; }
.auto p { margin: 0 0 6px; }
.auto .flags { margin: 6px 0; padding-left: 20px; color: var(--bad); }
.auto .goods { margin: 6px 0; padding-left: 20px; color: var(--ok); }
.auto table.ideas { border-collapse: collapse; width: 100%; margin: 6px 0; }
.auto table.ideas td { padding: 6px 8px 6px 0; border-top: 1px solid var(--line); vertical-align: top; }
.auto table.ideas td:first-child { width: 1%; white-space: nowrap; }
.auto .quote { margin-top: 4px; color: var(--muted); font-style: italic; }
.auto blockquote.draft { margin: 6px 0; padding: 8px 12px; border-left: 3px solid var(--brand); background: var(--surface); border-radius: 0 6px 6px 0; }

/* -- the path: states and links */
.path li a { color: inherit; text-decoration: none; }
.path li a:hover { text-decoration: underline; color: var(--brand); }
.path li.state-approved .min { color: var(--ok); font-weight: 600; }
.path li.state-sent .min { color: var(--brand); }
.path li.state-redo .min { color: var(--bad); font-weight: 600; }
.next-up { background: var(--ok-soft); border-radius: 8px; padding: 10px 14px; font-weight: 600; }
.next-up a { color: var(--ok); }