:root { --bg: #f4f4f2; --panel: #fff; --fg: #161616; --muted: #666; --line: #dedede; --accent: #d42e3c; --ok: #1e7a46; --warn: #b26a00; }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 15px/1.5 -apple-system, "Segoe UI", Roboto, Arial, sans-serif; }
[hidden] { display: none !important; }
a { color: inherit; }
.top { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 12px 24px; background: var(--panel); border-bottom: 1px solid var(--line); }
.brand { text-decoration: none; display: flex; flex-direction: column; }
.brand span { color: var(--accent); font-weight: 700; font-size: 20px; }
.brand small { color: var(--muted); }
.who { display: flex; gap: 12px; align-items: center; }
main { max-width: 1080px; margin: 0 auto; padding: 24px 16px 64px; }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 20px 24px; margin-bottom: 16px; }
.panel.narrow { max-width: 400px; margin: 48px auto; }
h1 { font-size: 22px; margin: 0 0 6px; display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
h2 { font-size: 18px; margin: 0 0 12px; }
label { display: block; font-weight: 600; margin: 14px 0 6px; }
input, select { width: 100%; padding: 9px 11px; font: inherit; border: 1px solid #c9c9c9; border-radius: 6px; background: #fff; }
button { font: inherit; cursor: pointer; border-radius: 6px; padding: 9px 16px; }
.primary { background: var(--fg); color: #fff; border: 1px solid var(--fg); }
.ghost { background: #fff; border: 1px solid #c9c9c9; color: var(--fg); padding: 6px 12px; }
form .primary { margin-top: 16px; }
.panel.narrow .primary { width: 100%; }
.hint { color: var(--muted); font-size: 13px; }
.error { color: var(--accent); font-weight: 600; }
.mocks { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 12px; margin: 12px 0; }
.mock { border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; }
.mock.on { border-color: var(--fg); box-shadow: 0 0 0 1px var(--fg); }
.mock-head { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.mock-head label { margin: 0; font-weight: 400; display: flex; gap: 8px; align-items: center; cursor: pointer; }
.mock-head input { width: auto; }
details summary { cursor: pointer; color: var(--muted); font-size: 13px; }
.task h4 { margin: 12px 0 4px; }
.task p { margin: 0 0 6px; font-size: 14px; }
.chart { margin: 8px 0; }
.chart svg { width: 100%; height: auto; border: 1px solid var(--line); }
.create { display: grid; grid-template-columns: 2fr 1.4fr auto; gap: 12px; align-items: end; }
.create label { margin-top: 0; }
.created { margin-top: 16px; padding: 14px; border-radius: 8px; background: #eef7f1; border: 1px solid #b9dcc6; }
.copyrow { display: flex; gap: 8px; margin-top: 8px; flex-wrap: wrap; }
.copyrow input { flex: 1; min-width: 220px; font-family: ui-monospace, Menlo, monospace; font-size: 13px; }
.copyrow button { margin: 0; }
.list { width: 100%; border-collapse: collapse; }
.list th, .list td { text-align: left; padding: 9px 8px; border-bottom: 1px solid var(--line); vertical-align: middle; }
.list th { font-size: 12px; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: .03em; }
.list tr.closed td { color: var(--muted); }
.actions { text-align: right; }
td.low, strong.low { color: var(--accent); }
.badge { display: inline-block; font-size: 12px; font-weight: 600; padding: 2px 8px; border-radius: 10px; background: #ececec; color: #333; }
.badge.submitted { background: #e1f2e8; color: var(--ok); }
.badge.in_progress { background: #fff2dc; color: var(--warn); }
.badge.closed, .badge.draft { background: #f3e1e3; color: var(--accent); }
.back { display: inline-block; margin-bottom: 12px; color: var(--muted); text-decoration: none; }
.work { display: grid; grid-template-columns: 1fr 1.3fr; gap: 24px; }
.work-task p { margin: 0 0 8px; font-weight: 600; font-size: 14px; }
.work-meta { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-bottom: 8px; }
.work-meta .ghost { margin-left: auto; }
.essay { white-space: pre-wrap; font-family: Georgia, "Times New Roman", serif; font-size: 16px; line-height: 1.6; border: 1px solid var(--line); border-radius: 6px; padding: 14px; background: #fcfcfb; min-height: 120px; }
@media (max-width: 760px) {
  .top { padding: 12px 16px; }
  .create, .work { grid-template-columns: 1fr; }
  .list { display: block; overflow-x: auto; }
}

/* AI grading */
.panel.ai { border-color: #c9c9c9; }
.ai-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.ai-head h2 { margin: 0; display: flex; gap: 8px; align-items: center; }
.bands { display: flex; gap: 12px; flex-wrap: wrap; margin: 12px 0 4px; }
.bands > div { border: 1px solid var(--line); border-radius: 8px; padding: 10px 14px; display: flex; flex-direction: column; min-width: 140px; }
.bands span { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .03em; }
.bands strong { font-size: 26px; line-height: 1.2; }
.band-main { background: var(--fg); color: #fff; border-color: var(--fg) !important; }
.band-main span { color: #ccc; }
.bands small { color: var(--muted); font-size: 12px; }
.work .feedback { grid-column: 1 / -1; border-top: 1px solid var(--line); padding-top: 12px; }
.feedback h3 { margin: 0 0 8px; }
.caps { color: var(--accent); font-size: 13px; }
.criteria { width: 100%; border-collapse: collapse; margin-bottom: 12px; }
.criteria th { width: 70px; vertical-align: top; text-align: left; padding: 8px 8px 8px 0; border-bottom: 1px solid var(--line); }
.criteria td { padding: 8px 0; border-bottom: 1px solid var(--line); }
.criteria td p { margin: 0 0 4px; }
.criteria ul, .feedback ul { margin: 0 0 6px; padding-left: 20px; }
.errors li { margin-bottom: 8px; }
.tag { display: inline-block; font-size: 11px; padding: 1px 6px; border-radius: 4px; background: #fff2dc; color: var(--warn); margin-right: 6px; }
.tag.systematic { background: #f3e1e3; color: var(--accent); }
q { font-style: italic; }
ins { text-decoration: none; background: #e1f2e8; padding: 0 2px; }
del { background: #f3e1e3; padding: 0 2px; }
.fix { display: flex; flex-direction: column; gap: 2px; margin: 8px 0; }
mark { background: #fff2dc; border-bottom: 2px solid var(--warn); padding: 0 1px; }
mark.systematic { background: #f8dfe2; border-bottom-color: var(--accent); }
.conf { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; margin-top: 4px; }
.why { background: #f2f4f8; border-left: 3px solid #5a6b8c; padding: 4px 8px; font-size: 13px; }
.try { margin-top: 8px; }
.btnlink { display: inline-block; text-decoration: none; border-radius: 6px; }
.note { background: #fff8e6; border: 1px solid #f0d9a8; border-radius: 6px; padding: 8px 10px; font-size: 13px; }
.essay mark { cursor: pointer; }
.essay mark:hover, .essay mark.active { outline: 2px solid var(--fg); outline-offset: 1px; }
.err-pop { position: absolute; z-index: 20; background: #fff; border: 1px solid #c9c9c9; border-radius: 8px; box-shadow: 0 8px 24px rgba(0,0,0,.15); padding: 12px 14px; font-size: 14px; }
.err-pop p { margin: 6px 0; }
.err-pop .ghost { margin-top: 4px; }