/* Classroom Lite — the one hand-written stylesheet (TECH-SPEC §2, §10.2). Mobile-first. */

:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --text: #1d2330;
  --muted: #5d6677;
  --border: #dde1e8;
  --accent: #2a5bd7;
  --accent-ink: #ffffff;
  --focus: #f0b400;
  --radius: 8px;
  --gutter: 16px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "Cascadia Mono", "Consolas", "SFMono-Regular", Menlo, monospace;

  /* chip colours (§10.7): neutral · blue · green · amber · red */
  --chip-neutral-bg: #eceef2; --chip-neutral-ink: #3b4352;
  --chip-blue-bg: #e3ecff;    --chip-blue-ink: #1f4bb8;
  --chip-green-bg: #dff3e6;   --chip-green-ink: #17663a;
  --chip-amber-bg: #fff1d6;   --chip-amber-ink: #8a5300;
  --chip-red-bg: #fde4e4;     --chip-red-ink: #a32020;

  --mock-stripe-a: #ffcc33;
  --mock-stripe-b: #1d2330;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 var(--font);
}
a { color: var(--accent); }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}
h1, h2, h3 { line-height: 1.25; margin: 0 0 .5em; }
h1 { font-size: 1.5rem; }
h2 { font-size: 1.15rem; }
h3 { font-size: 1rem; }
p { margin: 0 0 .75em; }
code, .code {
  font-family: var(--mono);
  font-size: .9em;
  background: var(--chip-neutral-bg);
  border-radius: 4px;
  padding: .05em .35em;
  overflow-wrap: anywhere;
}
.muted { color: var(--muted); }
.small { font-size: .875rem; }

/* ---- mock banner (FR-78: impossible to miss) ------------------------------------------------ */
.mock-banner {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 14px;
  padding: 6px var(--gutter);
  background: #2b2f3a;
  color: #fff;
  font-size: .85rem;
  border-bottom: 3px solid var(--mock-stripe-a);
}
.mock-banner .mock-label {
  font-weight: 800;
  letter-spacing: .08em;
  padding: 2px 10px;
  color: var(--mock-stripe-b);
  background: repeating-linear-gradient(-45deg, var(--mock-stripe-a) 0 10px, #ffe08a 10px 20px);
  border-radius: 4px;
}
.mock-banner .item { white-space: nowrap; }
.mock-banner .item b { font-weight: 600; }
.mock-banner a { color: #ffe08a; }
.mock-banner .lan { color: #ffb4b4; font-weight: 700; }
.mock-banner .spacer { flex: 1; }

/* ---- top bar ---------------------------------------------------------------------------------- */
.topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  padding: 10px var(--gutter);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.topbar .brand { font-weight: 700; color: var(--text); text-decoration: none; }
.topbar .crumbs { color: var(--muted); font-size: .95rem; overflow-wrap: anywhere; }
.topbar .crumbs a { color: inherit; }
.topbar .identity { margin-left: auto; display: flex; align-items: center; gap: 10px; font-size: .9rem; }
.topbar .identity form { margin: 0; }
.topbar .identity .btn.link { white-space: nowrap; }
.role { color: var(--muted); }
.role b { color: var(--text); }

/* ---- page ------------------------------------------------------------------------------------- */
.page { max-width: 1100px; margin: 0 auto; padding: 20px var(--gutter) 48px; }
.page.narrow { max-width: 640px; }
.flash {
  margin-bottom: 16px;
  padding: 10px 14px;
  background: var(--chip-blue-bg);
  color: var(--chip-blue-ink);
  border-radius: var(--radius);
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 16px;
}
.card > :last-child { margin-bottom: 0; }
.section-title {
  margin: 24px 0 10px;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--muted);
}
.list { list-style: none; margin: 0; padding: 0; }
.list > li { padding: 10px 0; border-top: 1px solid var(--border); }
.list > li:first-child { border-top: 0; }
.row { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 10px; }
.row .grow { flex: 1; min-width: 0; }
.empty { text-align: center; padding: 32px 16px; color: var(--muted); }
.empty h2 { color: var(--text); }

/* ---- buttons & forms ---------------------------------------------------------------------- */
.btn {
  display: inline-block;
  font: inherit;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--accent-ink);
  text-decoration: none;
  cursor: pointer;
}
.btn:hover { filter: brightness(1.08); }
.btn.secondary { background: var(--surface); color: var(--accent); }
.btn.small { padding: 4px 10px; font-size: .875rem; }
.btn.link { background: none; border: 0; padding: 0; color: var(--accent); font-weight: 400; text-decoration: underline; }
.btn.block { display: block; width: 100%; text-align: center; }

/* ---- chips (§10.7) ------------------------------------------------------------------------- */
.chip {
  display: inline-block;
  padding: 1px 9px;
  border-radius: 999px;
  font-size: .8rem;
  font-weight: 600;
  white-space: nowrap;
}
.chip-neutral { background: var(--chip-neutral-bg); color: var(--chip-neutral-ink); }
.chip-blue    { background: var(--chip-blue-bg);    color: var(--chip-blue-ink); }
.chip-green   { background: var(--chip-green-bg);   color: var(--chip-green-ink); }
.chip-amber   { background: var(--chip-amber-bg);   color: var(--chip-amber-ink); }
.chip-red     { background: var(--chip-red-bg);     color: var(--chip-red-ink); }
.chip-outline { background: transparent; border: 1px solid currentColor; }

/* ---- copy buttons ------------------------------------------------------------------------- */
.copyable { display: inline-flex; flex-wrap: wrap; align-items: center; gap: 6px; max-width: 100%; }
.copyable code { min-width: 0; }
.copy-btn {
  font: inherit;
  font-size: .8rem;
  padding: 1px 8px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--surface);
  color: var(--muted);
  cursor: pointer;
}
.copy-btn.copied { color: var(--chip-green-ink); border-color: var(--chip-green-ink); }

/* ---- sign-in / error pages ------------------------------------------------------------------ */
.center-card { max-width: 440px; margin: 40px auto; text-align: center; }
.center-card .lead { color: var(--muted); }
.error-code { font-size: .85rem; color: var(--muted); letter-spacing: .05em; }
.error-fragment { padding: 10px 14px; border-radius: var(--radius); background: var(--chip-red-bg); color: var(--chip-red-ink); }

/* ---- staff tables scroll inside their container only (§10.2) ------------------------------- */
.table-wrap { overflow-x: auto; }
table.data { border-collapse: collapse; width: 100%; background: var(--surface); }
table.data th, table.data td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); }
table.data th { font-size: .8rem; color: var(--muted); font-weight: 600; }

/* ---- forms --------------------------------------------------------------------------------- */
.field { display: grid; gap: 4px; margin-bottom: 12px; }
.field label { font-weight: 600; font-size: .9rem; }
.field input[type=text], .field input:not([type]) {
  font: inherit; width: 100%; padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px;
  background: var(--surface); color: var(--text);
}
.field .hint { font-size: .85rem; color: var(--muted); }
.form-error { color: var(--chip-red-ink); font-weight: 600; }
form.inline { display: inline; margin: 0; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 12px; }
.btn.lg { padding: 11px 22px; font-size: 1.05rem; }
.btn:disabled { opacity: .55; cursor: not-allowed; }

/* ---- student pages S10–S12: one column, cards, no tables (§10.2; the 360 px rule) ------------ */
.eyebrow { margin: 0 0 4px; font-size: .78rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase;
           color: var(--muted); overflow-wrap: anywhere; }
.facts { margin: 14px 0 0; display: grid; gap: 6px; }
.facts > div { display: flex; flex-wrap: wrap; gap: 0 12px; }
.facts dt { flex: 0 0 6.5em; color: var(--muted); font-size: .9rem; padding-top: 1px; }
.facts dd { flex: 1 1 12em; margin: 0; min-width: 0; }
.description { margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--border); overflow-wrap: anywhere; }
.description :last-child { margin-bottom: 0; }
.description pre { overflow-x: auto; background: var(--chip-neutral-bg); padding: 8px 10px; border-radius: 6px; }
.repo-name { display: block; margin: 6px 0 12px; padding: 10px 12px; font-family: var(--mono); font-size: .95rem;
             background: var(--chip-neutral-bg); border-radius: 6px; overflow-wrap: anywhere; }
.label { margin: 0; font-size: .85rem; font-weight: 600; color: var(--muted); }
.callout { margin: 12px 0; padding: 10px 14px; border: 1px solid; border-radius: var(--radius); overflow-wrap: anywhere; }
.callout > :last-child { margin-bottom: 0; }
.callout-info    { background: var(--chip-blue-bg);  border-color: #c8d6fb; color: var(--chip-blue-ink); }
.callout-warn    { background: var(--chip-amber-bg); border-color: #f2d7a1; color: var(--chip-amber-ink); }
.callout-danger  { background: var(--chip-red-bg);   border-color: #f3c0c0; color: var(--chip-red-ink); }
.callout-success { background: var(--chip-green-bg); border-color: #b8e2c7; color: var(--chip-green-ink); }
.card.danger  { border-color: #f3c0c0; border-left: 4px solid var(--chip-red-ink); }
.card.success { border-left: 4px solid var(--chip-green-ink); }
.card h2 .chip, .card h3 .chip { vertical-align: middle; margin-left: 6px; }
.headline { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 10px; margin-bottom: 4px; }
.headline h2, .headline h3 { margin: 0; }

.progress { height: 8px; margin: 10px 0 4px; background: var(--chip-neutral-bg); border-radius: 999px; overflow: hidden; }
.progress > span { display: block; height: 100%; background: var(--accent); border-radius: 999px; transition: width .5s ease; }
.steps { list-style: none; margin: 12px 0 0; padding: 0; }
.steps li { display: flex; align-items: center; gap: 10px; padding: 4px 0; color: var(--muted); }
.steps .dot { flex: none; width: 20px; height: 20px; border-radius: 50%; border: 2px solid var(--border);
              background: var(--surface); display: inline-flex; align-items: center; justify-content: center;
              font-size: .7rem; font-weight: 800; line-height: 1; }
.steps li.done { color: var(--text); }
.steps li.done .dot { background: var(--chip-green-ink); border-color: var(--chip-green-ink); color: #fff; }
.steps li.current { color: var(--text); font-weight: 600; }
.steps li.current .dot { border-color: var(--accent); border-right-color: transparent; animation: spin 1s linear infinite; }
.steps li.failed { color: var(--chip-red-ink); font-weight: 600; }
.steps li.failed .dot { background: var(--chip-red-ink); border-color: var(--chip-red-ink); color: #fff; }
.spinner { display: inline-block; width: .9em; height: .9em; border: 2px solid currentColor; border-right-color: transparent;
           border-radius: 50%; vertical-align: -1px; animation: spin 1s linear infinite; }
.live { display: inline-block; width: 8px; height: 8px; margin-right: 4px; border-radius: 50%; background: var(--chip-green-ink);
        animation: pulse 2s ease-in-out infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes pulse { 50% { opacity: .3; } }
@media (prefers-reduced-motion: reduce) {
  .steps li.current .dot, .spinner { animation: none; border-right-color: currentColor; }
  .live { animation: none; }
}

.tasks { list-style: none; margin: 0; padding: 0; }
.task { display: flex; gap: 12px; padding: 14px 0; border-top: 1px solid var(--border); }
.tasks > .task:first-child { border-top: 0; padding-top: 4px; }
.task-num { flex: none; width: 30px; height: 30px; border-radius: 50%; background: var(--accent); color: #fff;
            font-weight: 700; display: flex; align-items: center; justify-content: center; }
.task.done .task-num { background: var(--chip-green-ink); }
.task-body { flex: 1; min-width: 0; }
.task-body h3 { margin-bottom: .35em; }
.copy-line { display: flex; gap: 6px; align-items: stretch; margin: 6px 0 10px; }
.copy-line code { flex: 1; min-width: 0; display: block; padding: 8px 10px; overflow-wrap: anywhere; }
.copy-line .copy-btn { flex: none; align-self: flex-start; padding: 6px 10px; }
details.howto { border-top: 1px solid var(--border); padding: 8px 0; }
details.howto:last-of-type { border-bottom: 1px solid var(--border); }
details.howto summary { cursor: pointer; font-weight: 600; }
details.howto ol { margin: 8px 0 4px; padding-left: 1.3em; }
.links { display: flex; flex-wrap: wrap; gap: 6px 16px; margin-top: 10px; font-size: .95rem; }
.cards { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.cards > li { margin: 0; }

footer.foot { max-width: 1100px; margin: 0 auto; padding: 0 var(--gutter) 24px; font-size: .8rem; color: var(--muted); }

@media (max-width: 480px) {
  .topbar .identity { margin-left: 0; width: 100%; justify-content: space-between; }
  .btn.lg { display: block; width: 100%; text-align: center; }
  .facts dt { flex-basis: 100%; }
}

@media (min-width: 720px) {
  h1 { font-size: 1.75rem; }
  .grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
}

/* ---- staff setup screens: S3–S7 (M4) ------------------------------------------------------- */
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.nowrap { white-space: nowrap; }
.grow { flex: 1; min-width: 0; }
.full { flex-basis: 100%; }
.page-head { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 12px 20px; margin-bottom: 12px; }
.page-head h1 { margin-bottom: 4px; }
.page-head h1 .muted { font-weight: 500; }
.head-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 14px; margin: 0; color: var(--muted); font-size: .9rem; }
.head-actions { display: flex; gap: 8px; }
.tabs { display: flex; flex-wrap: wrap; gap: 2px; margin: 0 0 18px; border-bottom: 1px solid var(--border); }
.tabs a { padding: 8px 14px; color: var(--muted); text-decoration: none; border-bottom: 3px solid transparent; margin-bottom: -1px; font-weight: 600; font-size: .95rem; }
.tabs a:hover { color: var(--text); }
.tabs a[aria-current="page"] { color: var(--text); border-bottom-color: var(--accent); }
.section-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 12px; margin: 8px 0 10px; }
.section-head h2 { margin: 0; }
.card.flush { padding: 0; overflow: hidden; }
.card.flush table.data th:first-child, .card.flush table.data td:first-child { padding-left: 16px; }
.list.padded > li { padding-left: 16px; padding-right: 16px; }
table.data td { vertical-align: top; }
table.data tr.dim td { color: var(--muted); background: #fafbfc; }
table.data.compact th, table.data.compact td { padding: 5px 8px; }
table.data tbody tr:last-child td { border-bottom: 0; }
.actions-cell { text-align: right; }
.actions-cell form.inline, .actions-cell details { display: inline-block; vertical-align: top; }
.big-number { font-size: 1.1rem; }
.big-number b { font-size: 1.6rem; }
.kv { margin: 10px 0 0; display: grid; gap: 8px; }
.kv > div { display: grid; grid-template-columns: 8.5em 1fr; gap: 10px; }
.kv dt { color: var(--muted); font-size: .9rem; }
.kv dd { margin: 0; min-width: 0; overflow-wrap: anywhere; }
.compact { margin: 6px 0 0; padding-left: 1.2em; }
.compact li { margin: 2px 0; }
.counts { display: flex; flex-wrap: wrap; gap: 6px; }
.callout.attention { box-shadow: 0 0 0 3px #f6cf7d; }
.ok-line { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; font-size: .9rem; color: var(--muted); }
.mono-list { margin: 6px 0 10px; padding-left: 1.2em; }
.confirm-check { display: flex; gap: 8px; align-items: flex-start; font-weight: 600; cursor: pointer; }
.confirm-check input { margin-top: 4px; }

/* forms */
.field input[type=number], .field input[type=email], .field input[type=datetime-local], .field input[type=file],
.field select, .field textarea, .paste textarea {
  font: inherit; width: 100%; padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px;
  background: var(--surface); color: var(--text);
}
.field textarea, .paste textarea { font-family: var(--mono); font-size: .9rem; resize: vertical; }
.field input[readonly] { background: var(--bg); color: var(--muted); }
.field select:disabled { background: var(--bg); color: var(--muted); }
.field.has-error input, .field.has-error select, .field.has-error textarea { border-color: var(--chip-red-ink); box-shadow: 0 0 0 1px var(--chip-red-ink); }
.field-error { margin: 2px 0 0; color: var(--chip-red-ink); font-size: .875rem; font-weight: 600; }
.field-error[hidden] { display: none; }
.optional { font-weight: 400; color: var(--muted); font-size: .8rem; }
fieldset.field, fieldset.field-group { border: 0; padding: 0; margin: 0 0 12px; min-width: 0; }
fieldset legend { font-weight: 600; font-size: .9rem; padding: 0; margin-bottom: 4px; }
.field-group { margin-top: 6px; padding-top: 12px !important; border-top: 1px solid var(--border) !important; }
.hint-inline { font-weight: 400; color: var(--muted); font-size: .8rem; margin-left: 6px; }
.radios, .checks { display: flex; flex-wrap: wrap; gap: 6px 18px; }
.checks { flex-direction: column; gap: 6px; }
.radios label, .checks label { display: flex; align-items: center; gap: 6px; font-weight: 400; cursor: pointer; overflow-wrap: anywhere; }
.field.check label { display: flex; gap: 8px; align-items: center; font-weight: 600; cursor: pointer; }
.inline-fields { display: grid; gap: 0 12px; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); }
.inline-fields.dates { grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); }
.inline-fields .field { margin-bottom: 8px; }
.input-prefix { display: flex; align-items: stretch; }
.input-prefix span { padding: 8px 8px 8px 10px; border: 1px solid var(--border); border-right: 0; border-radius: 6px 0 0 6px; background: var(--bg); color: var(--muted); }
.input-prefix input { border-radius: 0 6px 6px 0 !important; }
.inline-form { display: flex; flex-wrap: wrap; align-items: flex-start; gap: 0 10px; margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--border); }
.inline-form .field { flex: 1 1 220px; margin-bottom: 4px; }
.inline-form > .btn { margin-top: 26px; }
details.paste { margin: 0 0 8px; }
details.paste summary { cursor: pointer; color: var(--accent); font-size: .9rem; }
.btn.danger { background: var(--chip-red-ink); border-color: var(--chip-red-ink); }
.disabled-action { display: inline-block; }

/* confirmation step without JavaScript (PRD §10: destructive actions confirm first) */
details.confirm { display: inline-block; position: relative; }
details.confirm > summary { list-style: none; }
details.confirm > summary::-webkit-details-marker { display: none; }
details.confirm[open] > summary { background: var(--bg); }
.confirm-body { margin-top: 8px; padding: 12px 14px; border: 1px solid var(--border); border-radius: var(--radius);
                background: var(--surface); text-align: left; max-width: 340px; white-space: normal;
                box-shadow: 0 6px 20px rgba(20, 30, 50, .12); }
details.confirm.danger .confirm-body { border-color: #f3c0c0; border-left: 4px solid var(--chip-red-ink); }
.actions-cell details.confirm[open] .confirm-body { position: absolute; right: 0; z-index: 5; width: 300px; }

/* two-column form + live preview */
.layout-split { display: grid; gap: 16px; align-items: start; }
.layout-split > .card { margin-bottom: 0; }
.preview-panel h2 { font-size: 1rem; }
.preview-panel h3 { font-size: .9rem; margin-top: 14px; }
.preview-panel.htmx-request { opacity: .7; transition: opacity .2s; }
.status-card.published { border-left: 4px solid var(--chip-green-ink); }
.status-card.draft { border-left: 4px solid var(--border); }
.status-card .headline { margin-bottom: 10px; }
.checklist { margin: 4px 0 8px; padding-left: 1.2em; }
.checklist li { color: var(--chip-amber-ink); }
.preview-ribbon { margin-bottom: 14px; padding: 10px 14px; border-radius: var(--radius); background: repeating-linear-gradient(-45deg, #fff8e6 0 12px, #fff3d6 12px 24px); border: 1px dashed #e0b85a; overflow-wrap: anywhere; }
.preview-ribbon a { margin-left: 6px; }
.muted-card { background: transparent; }
@media (min-width: 900px) {
  .layout-split { grid-template-columns: minmax(0, 1fr) 320px; }
  .preview-panel { position: sticky; top: 56px; }
}
/* refinements */
.hint { margin: 0; font-size: .85rem; color: var(--muted); }
.field { align-content: start; }
fieldset.field-group > legend { float: left; width: 100%; margin-bottom: 8px; }
fieldset.field-group > legend + * { clear: both; }
fieldset.field-group > .hint { margin-bottom: 8px; }
.inline-fields > .field, .inline-fields input { min-width: 0; }
.inline-fields.dates { grid-template-columns: repeat(auto-fit, minmax(215px, 1fr)); }
table.data code { white-space: nowrap; overflow-wrap: normal; }
.preview-panel .kv > div { grid-template-columns: 1fr; gap: 0; }
.preview-panel .kv dt { font-size: .8rem; }
.btn.ghost { background: none; border-color: transparent; color: var(--accent); font-weight: 600; }
.btn.ghost:hover { background: var(--chip-blue-bg); filter: none; }
details.confirm > summary.btn.ghost { padding: 4px 8px; }
.link-cell { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 8px; }
.link-cell .token { font-family: var(--mono); font-size: .8rem; color: var(--muted); white-space: nowrap; }
.table-wrap { position: relative; }

/* ---- S8 assignment board (M5): dense, sticky header and first column ---------------------------- */
.page.wide { max-width: 1400px; }
.page-head h1 code.slug { font-size: .7em; vertical-align: middle; }
.board-status { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px 20px;
                margin: 0 0 14px; padding: 10px 14px; background: var(--surface); border: 1px solid var(--border);
                border-radius: var(--radius); }
.stats { display: flex; flex-wrap: wrap; gap: 6px 22px; margin: 0; }
.stats > div { display: flex; flex-direction: column; }
.stats dt { font-size: .72rem; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; color: var(--muted); }
.stats dd { margin: 0; font-size: 1rem; }
.stats dd b { font-size: 1.25rem; }
.stats .warn dd b { color: var(--chip-amber-ink); }
.stats .phase dd { font-weight: 600; padding-top: 3px; }
.refresh-line { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; }
.filters { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin: 0 0 10px; }
.filter { padding: 3px 11px; border: 1px solid var(--border); border-radius: 999px; background: var(--surface);
          color: var(--text); text-decoration: none; font-size: .875rem; font-weight: 600; }
.filter .n { color: var(--muted); font-weight: 500; margin-left: 2px; }
.filter:hover { border-color: var(--accent); }
.filter.on { background: var(--accent); border-color: var(--accent); color: #fff; }
.filter.on .n { color: #dfe7ff; }
.filter.zero:not(.on) { opacity: .6; }
.reviewer-filter { display: inline-flex; align-items: center; gap: 6px; margin-left: auto; font-size: .875rem; }
.reviewer-filter label { color: var(--muted); font-weight: 600; }
.reviewer-filter select { font: inherit; padding: 3px 8px; border: 1px solid var(--border); border-radius: 6px; background: var(--surface); }
.board-wrap { max-height: calc(100vh - 150px); overflow: auto; border: 1px solid var(--border); border-radius: var(--radius);
              background: var(--surface); }
.board-wrap.short { max-height: none; }
table.board { font-size: .875rem; }
table.board th, table.board td { padding: 6px 9px; vertical-align: middle; }
table.board thead th { position: sticky; top: 0; z-index: 2; background: #f0f2f6; white-space: nowrap;
                       border-bottom: 1px solid var(--border); }
table.board th.student { position: sticky; left: 0; z-index: 1; background: var(--surface); min-width: 170px;
                         font-weight: 400; color: var(--text); font-size: .875rem; }
table.board thead th.student { z-index: 3; background: #f0f2f6; }
table.board tbody tr:hover td, table.board tbody tr:hover th.student { background: #f7f9fd; }
table.board tr.dim th.student { background: #fafbfc; color: var(--muted); }
table.board .who { font-weight: 600; text-decoration: none; color: var(--text); }
table.board .who:hover { color: var(--accent); text-decoration: underline; }
table.board .login { display: block; font-size: .78rem; color: var(--muted); }
table.board .num { text-align: right; font-variant-numeric: tabular-nums; }
table.board .chips { display: flex; flex-wrap: wrap; gap: 3px; }
table.board .links-cell { white-space: nowrap; text-align: right; }
table.board .links-cell a { margin-left: 8px; font-size: .82rem; }
table.board .links-cell a.more { font-weight: 600; }
a.sort { color: inherit; text-decoration: none; }
a.sort .arrow { margin-left: 3px; font-size: .7rem; opacity: .35; }
a.sort.on { color: var(--text); }
a.sort.on .arrow { opacity: 1; }
.empty-row { text-align: center; color: var(--muted); padding: 24px !important; }
.board-foot { margin-top: 8px; }
.failed-row { margin-top: 6px; }
.tests { margin-top: 18px; }

/* row detail */
.back { margin: 0 0 6px; font-size: .9rem; }
.pii { margin: 6px 0 0; }
.detail .pad { padding: 12px 16px 6px; margin: 0; }
.detail p.pad { padding-bottom: 12px; }
.explain { font-size: 1.02rem; }
.steps-kv > div { grid-template-columns: 8em 1fr; }
.actions-col .card h2 { font-size: 1rem; }
.warn-card { border-left: 4px solid var(--chip-amber-ink); }
.audit li { margin: 4px 0; }
@media (min-width: 900px) {
  .layout-split.detail { grid-template-columns: minmax(0, 1fr) 340px; }
}

/* ---- S9 review queue, claims, attention flags, outputs (M6) --------------------------------------- */
.bulk-actions { display: flex; flex-wrap: wrap; gap: 8px; margin: -6px 0 14px; }
.howto-strip { display: grid; gap: 6px 18px; margin: 0 0 14px; padding: 12px 16px 12px 36px; background: var(--chip-blue-bg);
               color: var(--chip-blue-ink); border: 1px solid #c8d6fb; border-radius: var(--radius); font-size: .92rem; }
.howto-strip li::marker { font-weight: 700; }
@media (min-width: 900px) { .howto-strip { grid-template-columns: repeat(3, 1fr); } }
.queue-status { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 14px; margin: 0 0 12px; }
.queue-status p { margin: 0; }
ol.queue { list-style: none; margin: 0 0 20px; padding: 0; display: grid; gap: 10px; }
.queue-item { display: flex; gap: 14px; padding: 14px 16px; background: var(--surface); border: 1px solid var(--border);
              border-radius: var(--radius); scroll-margin-top: 60px; }
.queue-item.next { border-color: var(--accent); box-shadow: 0 0 0 2px #c8d6fb; }
.queue-item.taken { background: #fafbfc; }
.queue-item.taken h2 a { color: var(--muted); }
.qi-num { flex: none; width: 30px; height: 30px; border-radius: 50%; background: var(--chip-neutral-bg); color: var(--muted);
          font-weight: 700; display: flex; align-items: center; justify-content: center; }
.queue-item.next .qi-num { background: var(--accent); color: #fff; }
.qi-body { flex: 1; min-width: 0; }
.qi-head { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 8px; }
.qi-head h2 { margin: 0 6px 0 0; font-size: 1.05rem; }
.qi-head h2 a { color: var(--text); text-decoration: none; }
.qi-head h2 a:hover { text-decoration: underline; }
.qi-head .login { font-weight: 400; font-size: .85rem; color: var(--muted); }
.qi-meta { margin: 4px 0 0; font-size: .9rem; color: var(--muted); }
.qi-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 10px; }
.qi-actions .more { margin-left: auto; font-weight: 600; }
.reviewed .section-title .n, .reviewed .follow { text-transform: none; letter-spacing: 0; }
.reviewed .follow { color: var(--chip-amber-ink); }
.reviewed .chips, .chips { display: inline-flex; flex-wrap: wrap; gap: 3px; }
ul.flags { list-style: none; margin: 10px 0 0; padding: 0; display: grid; gap: 6px; }
.flag { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 10px; padding: 6px 10px; border-radius: 6px;
        background: var(--chip-amber-bg); color: var(--chip-amber-ink); font-size: .9rem; overflow-wrap: anywhere; }
.flag.resolved { background: var(--chip-neutral-bg); color: var(--muted); }
.flag .muted { color: inherit; opacity: .8; }
details.attention-form textarea, details.reassign select { font: inherit; width: 100%; margin: 4px 0; padding: 6px 8px;
        border: 1px solid var(--border); border-radius: 6px; background: var(--surface); color: var(--text); }
details.attention-form .confirm-body, details.reassign .confirm-body { position: absolute; z-index: 5; width: 300px; }
.actions-col details.confirm .confirm-body { right: 0; }
.shell-switch { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }
.command-block { position: relative; margin: 8px 0; }
.command-block pre { margin: 0; padding: 12px 14px; overflow-x: auto; background: #1d2330; color: #e8ecf3; border-radius: var(--radius);
                     font-size: .85rem; line-height: 1.45; }
.command-block pre code { background: none; color: inherit; padding: 0; overflow-wrap: normal; white-space: pre; }
.command-block .copy-btn { position: absolute; top: 8px; right: 8px; background: var(--surface); color: var(--accent); }
@media (max-width: 600px) {
  .queue-item { padding: 12px; gap: 10px; }
  .qi-actions .more { margin-left: 0; }
  details.attention-form .confirm-body, details.reassign .confirm-body { position: static; width: auto; }
}
.queue-links { margin-top: 4px; padding-left: 14px; border-left: 3px solid var(--chip-blue-bg); }
.queue-links > li { padding: 6px 0; }

/* J11: the close offering zone (S4 and the confirmation page) */
.danger-zone { border-color: #f3c0c0; }
.danger-zone h2 { color: var(--chip-red-ink); }
code.wrap { overflow-wrap: anywhere; word-break: break-word; }
.copies { display: flex; flex-wrap: wrap; gap: 6px 14px; align-items: center; margin: 6px 0 0; }
.copyable code { overflow-wrap: anywhere; }
.copy-line code, code.repo-name { word-break: break-all; }