:root {
  --ink: #1f2937;
  --soft: #6b7280;
  --line: #e5e7eb;
  --bg: #f7f5f0;
  --card: #ffffff;
  --accent: #2563eb;
  --accent-ink: #1d4ed8;
  --tint: #eef2ff;
  --ok: #059669;
  --ok-tint: #ecfdf5;
  --err: #b91c1c;
  --err-tint: #fef2f2;
  --maths: #2563eb;
  --english: #c2410c;
  --radius: 14px;
  font-family: 'Nunito', system-ui, -apple-system, 'Segoe UI', sans-serif;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; background: var(--bg); }
button, input, select, textarea { font: inherit; color: inherit; }
h1, h2 { margin: 0; letter-spacing: -0.01em; }
h2 { font-size: 1.2rem; font-weight: 800; }
.muted { color: var(--soft); }
small.muted { display: block; margin-top: 4px; font-size: 0.82rem; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.loading { display: grid; place-items: center; min-height: 60vh; color: var(--soft); }

.auth-header { text-align: center; padding: 32px 16px 20px; }
.auth-header h1 { font-size: 1.8rem; font-weight: 800; margin-top: 8px; }
.auth-header p { color: var(--soft); margin: 6px 0 0; }

.shell { max-width: 1080px; margin: 0 auto; padding: 0 16px 48px; }
.topbar { display: flex; align-items: center; justify-content: space-between; padding: 18px 0; gap: 12px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.15rem; }
.account { display: flex; align-items: center; gap: 14px; font-size: 0.9rem; }
.plan { color: var(--soft); }

.kids { display: flex; gap: 8px; overflow-x: auto; padding: 4px 0 18px; }
.kid {
  display: inline-flex; align-items: center; gap: 8px; padding: 8px 14px 8px 8px; border-radius: 999px;
  border: 1.5px solid var(--line); background: var(--card); cursor: pointer; font-weight: 700; white-space: nowrap;
}
.kid small { color: var(--soft); font-weight: 600; }
.kid.on { border-color: var(--accent); background: var(--tint); }
.kid.add { padding: 8px 16px; color: var(--accent); border-style: dashed; }
.avatar {
  width: 28px; height: 28px; border-radius: 50%; display: grid; place-items: center;
  background: var(--accent); color: #fff; font-size: 0.85rem;
}

.grid { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 18px; align-items: start; }
.col-main, .col-side { display: grid; gap: 18px; }
@media (max-width: 860px) { .grid { grid-template-columns: 1fr; } }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; box-shadow: 0 1px 2px rgba(31, 41, 55, 0.04);
}
.card > p { margin: 8px 0 0; line-height: 1.5; }
.card.narrow { max-width: 560px; margin: 0 auto; }
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.card.tip { background: transparent; box-shadow: none; border-style: dashed; font-size: 0.9rem; }
.card.tip p { margin-top: 6px; }

.composer textarea {
  width: 100%; margin-top: 14px; padding: 14px; border-radius: 12px; border: 1.5px solid var(--line);
  resize: vertical; font-size: 1.05rem; line-height: 1.45; background: #fffef9;
}
.composer textarea:focus, input:focus, select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--tint); }

.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.chip {
  border: 1px solid var(--line); background: #fafafa; border-radius: 999px; padding: 4px 10px;
  font-size: 0.82rem; color: var(--soft); cursor: pointer; text-align: left;
}
.chip:hover { color: var(--ink); border-color: #cbd5e1; }

.row { display: flex; gap: 10px; margin-top: 14px; flex-wrap: wrap; }
.seg { display: inline-flex; flex-wrap: wrap; gap: 6px; }
.seg button {
  border: 1.5px solid var(--line); background: var(--card); border-radius: 10px; padding: 7px 12px;
  cursor: pointer; font-weight: 700; font-size: 0.92rem;
}
.seg button.on { border-color: var(--accent); background: var(--tint); color: var(--accent-ink); }
.seg.small button { padding: 5px 10px; font-size: 0.85rem; }

.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 18px; }
button.primary {
  background: var(--accent); color: #fff; border: 0; border-radius: 12px; padding: 12px 20px;
  font-weight: 800; cursor: pointer; font-size: 1rem;
}
button.primary:hover:not(:disabled) { background: var(--accent-ink); }
button.ghost {
  background: var(--card); border: 1.5px solid var(--line); border-radius: 12px; padding: 11px 16px;
  font-weight: 700; cursor: pointer;
}
button.ghost.small { padding: 6px 10px; border-radius: 9px; font-size: 0.85rem; }
button.ghost:hover:not(:disabled) { border-color: #cbd5e1; }
button:disabled { opacity: 0.55; cursor: default; }
button.link { background: none; border: 0; color: var(--accent); font-weight: 700; cursor: pointer; padding: 0; }
button.danger-link { background: none; border: 0; color: var(--err); cursor: pointer; margin-left: auto; font-weight: 600; }

.banner { margin-top: 14px; padding: 10px 14px; border-radius: 10px; font-size: 0.92rem; }
.banner.ok { background: var(--ok-tint); color: #065f46; }
.banner.error { background: var(--err-tint); color: var(--err); cursor: pointer; }
.shell > .banner.error { margin: 0 0 14px; }

.pending { margin-top: 18px; border-top: 1px solid var(--line); padding-top: 14px; }
.pending-head { display: flex; justify-content: space-between; font-size: 0.92rem; }
.pending ul { margin: 8px 0 0; padding-left: 0; list-style: none; display: grid; gap: 6px; }
.pending li { background: #fffbeb; border: 1px solid #fde68a; border-radius: 10px; padding: 8px 12px; font-size: 0.92rem; }
.tag { font-size: 0.7rem; text-transform: uppercase; font-weight: 800; letter-spacing: 0.04em; margin-right: 8px; }
.tag.maths { color: var(--maths); }
.tag.english { color: var(--english); }

.sheets { list-style: none; margin: 14px 0 0; padding: 0; display: grid; gap: 10px; }
.sheet { display: flex; gap: 12px; align-items: flex-start; padding: 12px; border: 1px solid var(--line); border-radius: 12px; }
.sheet.failed { border-color: #fecaca; background: var(--err-tint); }
.kind {
  flex: none; width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center;
  background: var(--tint); color: var(--accent); font-weight: 800;
}
.kind.reinforcement { background: #fff7ed; color: var(--english); }
.sheet-body { flex: 1; min-width: 0; }
.sheet-title { font-weight: 800; }
.sheet-meta { font-size: 0.82rem; color: var(--soft); margin-top: 2px; }
.sheet-notes { font-size: 0.85rem; margin-top: 4px; color: var(--ink); }
.sheet-error { font-size: 0.85rem; margin-top: 4px; color: var(--err); }
.sheet-actions { display: flex; gap: 6px; flex-wrap: wrap; justify-content: flex-end; }
.status { font-size: 0.82rem; font-weight: 700; color: var(--soft); white-space: nowrap; }
.status.generating, .status.queued { color: var(--accent); animation: pulse 1.4s ease-in-out infinite; }
.status.failed { color: var(--err); }
@keyframes pulse { 50% { opacity: 0.45; } }
@media (max-width: 560px) {
  .sheet { flex-wrap: wrap; }
  .sheet-actions { width: 100%; justify-content: flex-start; padding-left: 46px; }
}

.form { display: grid; gap: 16px; margin-top: 18px; }
.form label, .field-row label { display: grid; gap: 6px; font-weight: 700; font-size: 0.92rem; }
.form label .muted { font-weight: 600; }
.form small.muted { font-weight: 500; }
fieldset { border: 0; padding: 0; margin: 0; display: grid; gap: 6px; }
legend { font-weight: 700; font-size: 0.92rem; margin-bottom: 6px; }
input, select {
  padding: 10px 12px; border: 1.5px solid var(--line); border-radius: 10px; background: #fff; width: 100%;
}
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 14px; }

.facts { display: grid; grid-template-columns: auto 1fr; gap: 6px 14px; margin: 14px 0 0; font-size: 0.9rem; }
.facts dt { color: var(--soft); }
.facts dd { margin: 0; overflow-wrap: anywhere; }

.switch { position: relative; display: inline-block; width: 46px; height: 26px; flex: none; }
.switch input { opacity: 0; width: 0; height: 0; }
.switch span[aria-hidden] {
  position: absolute; inset: 0; border-radius: 999px; background: #d1d5db; transition: background 0.15s; cursor: pointer;
}
.switch span[aria-hidden]::after {
  content: ''; position: absolute; top: 3px; left: 3px; width: 20px; height: 20px; border-radius: 50%;
  background: #fff; box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2); transition: transform 0.15s;
}
.switch input:checked + span { background: var(--ok); }
.switch input:checked + span::after { transform: translateX(20px); }
.switch input:focus-visible + span { box-shadow: 0 0 0 3px var(--tint); }
.switch.disabled span[aria-hidden] { cursor: not-allowed; opacity: 0.5; }

/* Posted packs */
.form.compact { gap: 12px; margin-top: 12px; }
.field-row.tight { margin-top: 0; grid-template-columns: 1fr 120px; }
.next-pack { display: grid; gap: 2px; margin-top: 12px; padding: 12px 14px; border-radius: 12px; background: var(--tint); }
.next-pack strong { font-size: 1.15rem; color: var(--accent-ink); }
.next-pack small.muted { margin-top: 2px; }
.addr { font-style: normal; display: grid; margin-top: 12px; font-size: 0.9rem; line-height: 1.45; }
.packs { list-style: none; margin: 14px 0 0; padding: 12px 0 0; border-top: 1px solid var(--line); display: grid; gap: 8px; font-size: 0.86rem; }
.packs li { display: grid; grid-template-columns: 82px 1fr auto; gap: 8px; align-items: baseline; }
.packs .muted { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pack-status { font-weight: 700; color: var(--accent); white-space: nowrap; }
.pack-status.posted { color: var(--ok); }
.pack-status.skipped, .pack-status.failed { color: var(--err); }
.post-promo { border-style: dashed; background: #fffdf7; font-size: 0.92rem; }
.post-promo p { margin: 6px 0 8px; }
.post-promo a.link { color: var(--accent); font-weight: 700; text-decoration: none; }

/* Sign-in screens */
.auth { max-width: 420px; margin: 0 auto; padding: 0 16px 48px; }
.auth .card { margin-top: 8px; }
.auth h2 { margin-bottom: 4px; }
.auth .switch-links { display: flex; justify-content: space-between; gap: 12px; margin-top: 16px; font-size: 0.9rem; flex-wrap: wrap; }
.auth .actions button.primary { width: 100%; }
.demo-badge { background: #fef3c7; color: #92400e; border-radius: 999px; padding: 3px 10px; font-size: 0.8rem; font-weight: 700; }

/* Favourite colour */
.swatches { display: flex; flex-wrap: wrap; gap: 8px; }
.swatch {
  width: 34px; height: 34px; border-radius: 50%; border: 3px solid #fff; background: var(--c);
  box-shadow: 0 0 0 1.5px var(--line); cursor: pointer; padding: 0;
}
.swatch.on { box-shadow: 0 0 0 3px var(--c); }
.swatch:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }

/* Personal suggestion chips */
.chip.repeat { background: #fff7ed; border-color: #fed7aa; color: #9a3412; }
.chip.watch { background: #f5f3ff; border-color: #ddd6fe; color: #5b21b6; }
.chip.repeat:hover, .chip.watch:hover { color: var(--ink); }

/* Marking a finished sheet */
.sheet { flex-wrap: wrap; }
.mark-btn.todo { border-color: var(--accent); color: var(--accent-ink); }
.mark-panel { flex-basis: 100%; margin-top: 10px; padding: 14px; border-radius: 12px; background: #fafaf7; border: 1px solid var(--line); }
.mark-help { margin: 0 0 8px; font-size: 0.9rem; }
.mark-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
.mark-section { font-weight: 800; font-size: 0.82rem; color: var(--soft); margin-top: 8px; }
.mark-q { display: grid; grid-template-columns: auto 26px 1fr minmax(90px, 35%); gap: 8px; align-items: baseline; padding: 6px 4px; border-radius: 8px; cursor: pointer; font-size: 0.92rem; }
.mark-q:hover { background: #f1f1ec; }
.mark-q input { width: auto; transform: translateY(2px); }
.mark-q:has(input:checked) { background: #fef2f2; }
.mark-q .qn { color: var(--soft); font-weight: 700; }
.mark-q .qa { font-weight: 800; color: var(--ink); text-align: right; }
.mark-foot { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-top: 12px; font-size: 0.9rem; }
.mark-practise { display: flex; gap: 8px; align-items: center; margin-top: 10px; font-size: 0.9rem; font-weight: 600; }
.mark-practise input { width: auto; }
button.primary.small { padding: 8px 14px; font-size: 0.9rem; border-radius: 10px; }
@media (max-width: 560px) { .mark-q { grid-template-columns: auto 22px 1fr; } .mark-q .qa { grid-column: 3; text-align: left; } }

/* Each child tab: pick on the left, edit pencil on the right */
div.kid { padding: 0; gap: 0; cursor: default; }
.kid-pick {
  display: inline-flex; align-items: center; gap: 8px; padding: 8px 6px 8px 8px; border: 0; background: none;
  font-weight: 700; cursor: pointer; border-radius: 999px 0 0 999px;
}
.kid-pick small { color: var(--soft); font-weight: 600; }
.kid-edit {
  border: 0; border-left: 1px solid var(--line); background: none; cursor: pointer; padding: 8px 12px 8px 10px;
  color: var(--soft); font-size: 1rem; border-radius: 0 999px 999px 0;
}
.kid-edit:hover { color: var(--accent-ink); background: var(--tint); }
.readonly-field { display: grid; gap: 4px; font-size: 0.92rem; }
.readonly-field span { font-weight: 700; }
.readonly-field strong { font-weight: 600; padding: 10px 12px; border: 1.5px dashed var(--line); border-radius: 10px; background: #fafafa; overflow-wrap: anywhere; }
.sheet.held { border-color: #fde68a; background: #fffbeb; }
.status.held { color: #92400e; }

.brand span { display: flex; flex-direction: column; line-height: 1.1; }
.brand-sub { font-size: 0.78rem; font-weight: 700; color: var(--soft); letter-spacing: 0.01em; }
.auth-header .tagline { margin: 2px 0 0; font-weight: 800; color: var(--accent); font-size: 1.05rem; }