/* Prompt Marking Desk, self-hosted. Layout: a marking desk. Teacher = question rail + submission ledger; student = one column (assignment, prompt, marked result). Green highlighter = strong, red pen underline = weak. */
:root {
  --paper: #f3f5f7;
  --sheet: #ffffff;
  --ink: #1b2232;
  --ink-2: #576071;
  --rule: #dde1e8;
  --accent: #2443c9;
  --accent-soft: #e5e9fb;
  --on-accent: #ffffff;
  --good: #19704a;
  --good-bg: #cfeedd;
  --mid: #9a5a06;
  --mid-bg: #fbe9c9;
  --weak: #b3261e;
  --weak-bg: #fbe1de;
  --shadow: 0 1px 2px rgba(20,30,60,.06), 0 8px 24px rgba(20,30,60,.08);
  --f-display: "Avenir Next", "Segoe UI Variable Display", "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
  --f-body: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --f-mono: ui-monospace, "SF Mono", "Cascadia Mono", Consolas, "Liberation Mono", Menlo, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #11141b; --sheet: #191e28; --ink: #e8eaf0; --ink-2: #9aa3b5; --rule: #2a3141;
    --accent: #93a6ff; --accent-soft: #242d50; --on-accent: #0e1430;
    --good: #74d6a2; --good-bg: #183a2a; --mid: #f2b860; --mid-bg: #3c2c12; --weak: #ff958b; --weak-bg: #45201d;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.35);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #11141b; --sheet: #191e28; --ink: #e8eaf0; --ink-2: #9aa3b5; --rule: #2a3141;
  --accent: #93a6ff; --accent-soft: #242d50; --on-accent: #0e1430;
  --good: #74d6a2; --good-bg: #183a2a; --mid: #f2b860; --mid-bg: #3c2c12; --weak: #ff958b; --weak-bg: #45201d;
  --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.35);
  color-scheme: dark;
}
* { box-sizing: border-box; }
body { background: var(--paper); color: var(--ink); font-family: var(--f-body); font-size: 15px; line-height: 1.5; }
h1, h2, h3 { font-family: var(--f-display); font-weight: 700; margin: 0; text-wrap: balance; letter-spacing: -0.01em; }
h2 { font-size: 1.45rem; }
h3 { font-size: 1.02rem; }
p { margin: 0; }
button { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.eyebrow { font-size: .72rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-2); }

.wrap { padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }
header.top { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 5; background: var(--sheet); border-bottom: 1px solid var(--rule); }
header.top .inner { max-width: 1180px; margin: 0 auto; display: flex; align-items: center; gap: 12px 20px; flex-wrap: wrap; padding-block: 12px; }
.brand { display: flex; align-items: baseline; gap: 10px; margin-right: auto; }
.brand h1 { font-size: 1.25rem; }
.brand .who { color: var(--ink-2); font-size: .85rem; }
.seg { display: inline-flex; border: 1px solid var(--rule); border-radius: 999px; padding: 3px; background: var(--paper); }
.seg button { border: 0; background: transparent; padding: 5px 14px; border-radius: 999px; cursor: pointer; font-size: .88rem; font-weight: 500; color: var(--ink-2); }
.seg button[aria-pressed="true"] { background: var(--sheet); color: var(--ink); box-shadow: var(--shadow); }

main { max-width: 1180px; margin: 0 auto; padding-block: 24px 64px; }
.banner { max-width: 1180px; margin: 16px auto 0; padding: 10px 14px; border-radius: 10px; background: var(--mid-bg); color: var(--ink); font-size: .9rem; }

.btn { display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--rule); background: var(--sheet); border-radius: 8px; padding: 7px 13px; cursor: pointer; font-weight: 500; font-size: .9rem; }
.btn:hover { border-color: var(--ink-2); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.btn.primary:hover { filter: brightness(1.08); }
.btn.danger { color: var(--weak); }
.btn.danger.armed { background: var(--weak); border-color: var(--weak); color: var(--sheet); }
.btn:disabled { opacity: .55; cursor: default; }
.link { background: none; border: 0; padding: 0; color: var(--accent); cursor: pointer; font-weight: 500; text-decoration: underline; text-underline-offset: 3px; }

.pill { display: inline-block; padding: 1px 9px; border-radius: 999px; font-size: .78rem; font-weight: 600; font-variant-numeric: tabular-nums; white-space: nowrap; }
.pill.good { background: var(--good-bg); color: var(--good); }
.pill.mid { background: var(--mid-bg); color: var(--mid); }
.pill.weak { background: var(--weak-bg); color: var(--weak); }
.pill.plain { background: var(--paper); color: var(--ink-2); border: 1px solid var(--rule); }
.chip { display: inline-block; padding: 3px 10px; border-radius: 6px; background: var(--accent-soft); color: var(--ink); font-size: .82rem; }

/* Teacher */
.desk { display: grid; grid-template-columns: 270px minmax(0, 1fr); gap: 24px; align-items: start; }
@media (max-width: 820px) { .desk { grid-template-columns: minmax(0, 1fr); } }
.rail { display: flex; flex-direction: column; gap: 8px; }
.rail-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 4px; }
.qitem { text-align: left; border: 1px solid transparent; background: transparent; border-radius: 10px; padding: 10px 12px; cursor: pointer; display: flex; flex-direction: column; gap: 2px; }
.qitem:hover { background: var(--sheet); }
.qitem[aria-current="true"] { background: var(--sheet); border-color: var(--rule); box-shadow: var(--shadow); }
.qitem .t { font-weight: 600; }
.qitem .m { font-size: .8rem; color: var(--ink-2); }
.panel { background: var(--sheet); border: 1px solid var(--rule); border-radius: 14px; padding: 22px; min-width: 0; }
.qhead { display: flex; gap: 12px; align-items: flex-start; flex-wrap: wrap; }
.qhead .grow { flex: 1 1 280px; min-width: 0; display: flex; flex-direction: column; gap: 6px; }
.qhead .tools { display: flex; gap: 8px; flex-wrap: wrap; }
.task-text { color: var(--ink-2); max-width: 68ch; white-space: pre-wrap; }
.stats { display: flex; flex-wrap: wrap; gap: 6px 22px; margin: 18px 0 14px; padding-block: 12px; border-block: 1px solid var(--rule); font-size: .9rem; color: var(--ink-2); }
.stats b { color: var(--ink); font-family: var(--f-display); font-size: 1.15rem; margin-right: 4px; font-variant-numeric: tabular-nums; }
.tablewrap { overflow-x: auto; }
table.ledger { width: 100%; border-collapse: collapse; font-size: .9rem; min-width: 560px; }
.ledger th { text-align: left; font-size: .72rem; letter-spacing: .07em; text-transform: uppercase; color: var(--ink-2); font-weight: 600; padding: 6px 10px; border-bottom: 1px solid var(--rule); }
.ledger td { padding: 10px; border-bottom: 1px solid var(--rule); vertical-align: middle; }
.ledger tr.row { cursor: pointer; }
.ledger tr.row:hover td { background: var(--paper); }
.trail { display: flex; gap: 4px; align-items: center; flex-wrap: wrap; }
.trail .arrow { color: var(--ink-2); font-size: .75rem; }
.num { font-variant-numeric: tabular-nums; }
.empty { padding: 28px; text-align: center; color: var(--ink-2); display: flex; flex-direction: column; gap: 12px; align-items: center; }
.empty .row-btns { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; }
.pin { color: var(--accent); font-weight: 600; font-size: .8rem; }

/* Student */
.stu { max-width: 860px; margin: 0 auto; display: flex; flex-direction: column; gap: 20px; }
.qtabs { display: flex; gap: 8px; flex-wrap: wrap; }
.qtabs button { border: 1px solid var(--rule); background: var(--sheet); border-radius: 999px; padding: 6px 14px; cursor: pointer; font-size: .88rem; }
.qtabs button[aria-pressed="true"] { border-color: var(--accent); background: var(--accent-soft); font-weight: 600; }
.task-card { background: var(--sheet); border: 1px solid var(--rule); border-radius: 14px; padding: 22px; display: flex; flex-direction: column; gap: 10px; }
.task-card .chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 4px; }
.compose { display: flex; flex-direction: column; gap: 10px; }
.compose label { font-weight: 600; }
textarea, input[type="text"], select { width: 100%; font: inherit; color: var(--ink); background: var(--sheet); border: 1px solid var(--rule); border-radius: 10px; padding: 12px 14px; }
textarea:focus, input[type="text"]:focus, select:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 3px var(--accent-soft); }
#prompt-in { font-family: var(--f-mono); font-size: .9rem; line-height: 1.6; min-height: 220px; resize: vertical; }
.quick { display: flex; gap: 8px 16px; flex-wrap: wrap; font-size: .82rem; color: var(--ink-2); }
.quick .warn { color: var(--weak); font-weight: 600; }
.actions { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.status { color: var(--ink-2); font-size: .9rem; }
.status.err { color: var(--weak); }
.thinking::after { content: ""; display: inline-block; width: 1.2em; text-align: left; animation: dots 1.2s steps(4) infinite; }
@keyframes dots { 0% { content: ""; } 25% { content: "."; } 50% { content: ".."; } 75% { content: "..."; } }
@media (prefers-reduced-motion: reduce) { .thinking::after { animation: none; content: "..."; } }

/* Marked result */
.result { background: var(--sheet); border: 1px solid var(--rule); border-radius: 14px; padding: 22px; display: flex; flex-direction: column; gap: 18px; }
.result-top { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; font-size: .85rem; color: var(--ink-2); }
.verdict { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 6px 20px; align-items: center; }
.verdict .score { display: flex; align-items: baseline; gap: 6px; }
.verdict .pts { font-family: var(--f-display); font-size: 3rem; line-height: 1; font-weight: 700; font-variant-numeric: tabular-nums; }
.verdict .of { color: var(--ink-2); font-size: .9rem; }
.verdict .band { font-family: var(--f-display); font-weight: 700; font-size: 1.15rem; }
.verdict .bandline { color: var(--ink-2); }
.verdict.good .pts, .verdict.good .band { color: var(--good); }
.verdict.mid .pts, .verdict.mid .band { color: var(--mid); }
.verdict.weak .pts, .verdict.weak .band { color: var(--weak); }
.meter { grid-column: 1 / -1; height: 8px; background: var(--paper); border-radius: 999px; overflow: hidden; border: 1px solid var(--rule); }
.meter span { display: block; height: 100%; border-radius: 999px; }
.verdict.good .meter span { background: var(--good); }
.verdict.mid .meter span { background: var(--mid); }
.verdict.weak .meter span { background: var(--weak); }
.summary { max-width: 70ch; }
.next { border-left: 3px solid var(--accent); background: var(--accent-soft); padding: 10px 14px; border-radius: 0 8px 8px 0; display: flex; flex-direction: column; gap: 2px; }
.cols { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: 24px; }
@media (max-width: 760px) { .cols { grid-template-columns: minmax(0, 1fr); } }
.checklist ul { list-style: none; padding: 0; margin: 10px 0 0; display: flex; flex-direction: column; gap: 10px; }
.checklist li { display: grid; grid-template-columns: 26px minmax(0, 1fr); gap: 10px; align-items: start; }
.checklist .mark { width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; font-weight: 700; font-size: .85rem; }
.checklist .s2 .mark { background: var(--good-bg); color: var(--good); }
.checklist .s1 .mark { background: var(--mid-bg); color: var(--mid); }
.checklist .s0 .mark { background: var(--weak-bg); color: var(--weak); }
.checklist strong { font-weight: 600; }
.checklist .pt { margin-left: 8px; font-size: .78rem; color: var(--ink-2); font-variant-numeric: tabular-nums; }
.checklist li p { color: var(--ink-2); font-size: .88rem; }
.legend { font-size: .8rem; color: var(--ink-2); margin: 6px 0 10px; }
pre.prompt { margin: 0; white-space: pre-wrap; word-break: break-word; font-family: var(--f-mono); font-size: .86rem; line-height: 1.75; background: var(--paper); border: 1px solid var(--rule); border-radius: 10px; padding: 14px; max-height: 520px; overflow: auto; }
mark.hl, span.hl { color: inherit; border-radius: 3px; padding: 0 1px; }
.hl.good { background: var(--good-bg); }
.hl.weak { background: transparent; text-decoration: underline wavy var(--weak); text-decoration-thickness: 1.5px; text-underline-offset: 4px; }
mark.hl sup { font-family: var(--f-body); font-size: .62rem; font-weight: 700; margin-left: 1px; }
mark.hl.good sup { color: var(--good); }
mark.hl.weak sup { color: var(--weak); }
ol.notes { list-style: none; padding: 0; margin: 12px 0 0; display: flex; flex-direction: column; gap: 6px; font-size: .88rem; }
ol.notes li { display: grid; grid-template-columns: 24px minmax(0, 1fr); gap: 8px; }
ol.notes .n { font-weight: 700; font-variant-numeric: tabular-nums; text-align: right; }
ol.notes .good .n { color: var(--good); }
ol.notes .weak .n { color: var(--weak); }
ol.notes .q { color: var(--ink-2); font-style: italic; }

.attempts { display: flex; flex-direction: column; gap: 8px; }
.attempt-list { display: flex; gap: 8px; flex-wrap: wrap; }
.attempt-list button { border: 1px solid var(--rule); background: var(--sheet); border-radius: 10px; padding: 8px 12px; cursor: pointer; display: flex; flex-direction: column; align-items: flex-start; gap: 2px; font-size: .8rem; color: var(--ink-2); }
.attempt-list button[aria-pressed="true"] { border-color: var(--accent); }
.attempt-list b { font-family: var(--f-display); font-size: 1.05rem; color: var(--ink); font-variant-numeric: tabular-nums; }
details.example { background: var(--sheet); border: 1px solid var(--rule); border-radius: 12px; padding: 12px 16px; }
details.example summary { cursor: pointer; font-weight: 600; display: flex; gap: 10px; align-items: center; }
details.example[open] summary { margin-bottom: 14px; }
details.example .result { border: 0; padding: 0; }

/* Modal */
.scrim { position: fixed; inset: 0; z-index: 20; background: rgba(10,14,25,.45); display: flex; justify-content: center; align-items: flex-start; overflow-y: auto; padding: calc(24px + env(safe-area-inset-top, 0px)) max(12px, env(safe-area-inset-right, 0px)) calc(24px + env(safe-area-inset-bottom, 0px)) max(12px, env(safe-area-inset-left, 0px)); }
.sheet { background: var(--sheet); border-radius: 16px; box-shadow: var(--shadow); width: min(1000px, 100%); padding: 24px; display: flex; flex-direction: column; gap: 16px; }
.sheet-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; flex-wrap: wrap; }
.sheet-head .tools { display: flex; gap: 8px; flex-wrap: wrap; }
.sheet.present { width: min(1240px, 100%); font-size: 17px; }
.sheet.present pre.prompt { font-size: 1rem; max-height: none; }
.sheet.present h2 { font-size: 2rem; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field label, .field .lab { font-weight: 600; font-size: .9rem; }
.field .hint { color: var(--ink-2); font-size: .82rem; }
.rubric-rows { display: flex; flex-direction: column; gap: 8px; }
.rrow { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 2.2fr) auto; gap: 8px; align-items: start; }
.rrow input { padding: 8px 10px; }
@media (max-width: 620px) { .rrow { grid-template-columns: minmax(0, 1fr) auto; } .rrow .want { grid-column: 1 / 2; } }
.check { display: flex; gap: 8px; align-items: center; font-size: .9rem; }
.sheet-foot { display: flex; gap: 8px; justify-content: space-between; flex-wrap: wrap; align-items: center; }
.sheet-foot .r { display: flex; gap: 8px; margin-left: auto; }
.err-line { color: var(--weak); font-size: .88rem; }

/* Self-hosted additions */
html { color-scheme: light; }
body { margin: 0; }
[hidden] { display: none !important; }
.top-tools { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.login { max-width: 460px; margin: 6vh auto 0; display: flex; flex-direction: column; gap: 18px; }
.login .panel { display: flex; flex-direction: column; gap: 14px; }
.login form { display: flex; flex-direction: column; gap: 12px; }
.login details summary { cursor: pointer; color: var(--ink-2); font-size: .9rem; }
.login details[open] summary { margin-bottom: 12px; }
.login .intro { color: var(--ink-2); }
.setting-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; }
.usage { padding: 12px 14px; border-radius: 10px; background: var(--paper); border: 1px solid var(--rule); font-size: .9rem; color: var(--ink-2); }
.usage b { color: var(--ink); font-variant-numeric: tabular-nums; }
.testmode { background: var(--mid-bg); color: var(--mid); font-weight: 600; }
.code-big { font-family: var(--f-mono); font-size: 1.05rem; letter-spacing: .12em; font-weight: 600; }
.qhead .meta { color: var(--ink-2); font-size: .85rem; }
.meter span { width: var(--w, 0%); }