/* One stylesheet, no fonts or images from anywhere (check.sh H1). */
:root {
  color-scheme: light dark;
  --ink: #1d1c22;
  --paper: #fbfaf7;
  --panel: #ffffff;
  --muted: #5b5866;
  --rule: #d9d6cf;
  --accent: #2f5d50;
  --accent-ink: #ffffff;
  --focus: #1f6feb;
  --off: #8a8794;
  --chip: #ece9e2;
  --chip-high: #e3ece8;
  --hint: #fdf6dc;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #ecebf0;
    --paper: #18171c;
    --panel: #201f25;
    --muted: #a7a4b1;
    --rule: #3a3842;
    --accent: #7fbfa9;
    --accent-ink: #10221c;
    --focus: #79b8ff;
    --off: #77747f;
    --chip: #2c2a31;
    --chip-high: #24342e;
    --hint: #352f19;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 17px/1.55 system-ui, -apple-system, "Segoe UI", sans-serif;
}

.top, main {
  max-width: 60rem;
  margin: 0 auto;
  padding: 0 1rem;
}
.top { padding-top: 1.25rem; }
.top h1 { font-size: 1.35rem; margin: 0; letter-spacing: 0.01em; }
main { padding-bottom: 4rem; }

h2 { font-size: 1.1rem; margin: 1.75rem 0 0.75rem; }
h3 { font-size: 1rem; margin: 1.25rem 0 0.25rem; }

label { display: block; font-weight: 600; margin: 1rem 0 0.35rem; }
.optional { font-weight: 400; color: var(--muted); }

input[type="text"], textarea {
  display: block;
  width: 100%;
  font: inherit;
  color: inherit;
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 0.6rem 0.7rem;
}
textarea { min-height: 12rem; resize: vertical; line-height: 1.5; }

.help, .note, .source, .tally { color: var(--muted); }
.help { margin: 0.4rem 0 0; font-size: 0.92rem; }

.hint, .notice {
  background: var(--hint);
  border-radius: 6px;
  padding: 0.6rem 0.8rem;
  margin: 0.75rem 0 0;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.5rem;
  margin-top: 1rem;
}
label.check { display: inline-flex; align-items: center; gap: 0.45rem; font-weight: 400; margin: 0; }
label.check input { width: 1.1rem; height: 1.1rem; margin: 0; }

button {
  font: inherit;
  cursor: pointer;
  border-radius: 6px;
}
button.primary {
  background: var(--accent);
  color: var(--accent-ink);
  border: 0;
  padding: 0.55rem 1.2rem;
  font-weight: 600;
}
button.primary:disabled { opacity: 0.6; cursor: progress; }
button.link {
  background: none;
  border: 0;
  padding: 0.25rem 0.35rem;
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}
h2:focus { outline: none; }
h2:focus-visible { outline: 3px solid var(--focus); }

.status { margin: 1.25rem 0 0; font-weight: 600; }
.deck-title { margin: -0.25rem 0 0.25rem; font-weight: 600; }
.source { margin: 0 0 0.5rem; font-style: italic; }
.note { margin: 0.25rem 0; }

.bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem 0.75rem;
  margin: 0.75rem 0;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--rule);
}
.tally { margin-right: auto; }

table.cards { width: 100%; border-collapse: collapse; }
.cards th, .cards td {
  text-align: left;
  vertical-align: top;
  padding: 0.6rem 0.5rem;
  border-bottom: 1px solid var(--rule);
}
.cards thead th { font-size: 0.85rem; color: var(--muted); font-weight: 600; }
.cards td.keep { width: 2.5rem; }
.cards td.keep input { width: 1.15rem; height: 1.15rem; margin: 0.2rem 0 0; }
.cards th.face label { margin: 0; font-weight: 600; cursor: pointer; }
.cards td.level { white-space: nowrap; width: 1%; }
.cards td.sentence { overflow-wrap: anywhere; }
.cards tr.off .face, .cards tr.off .sentence, .cards tr.off .level { color: var(--off); }
.cards tr.off .face label { text-decoration: line-through; }

.chip {
  display: inline-block;
  font-size: 0.85rem;
  padding: 0.05rem 0.45rem;
  border-radius: 999px;
  background: var(--chip);
}
.chip.b4, .chip.b5 { background: var(--chip-high); }
.kind { font-size: 0.8rem; color: var(--muted); margin-left: 0.4em; }

.declined p { margin: 0 0 0.5rem; overflow-wrap: anywhere; }
.declined .withheld { color: var(--muted); margin-top: 1rem; }

/* "Open a saved project": the file input stays in the tab order but out of
   sight, and its label is the button; the input's focus ring is drawn on it. */
input.file {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  overflow: hidden;
}
label.button {
  display: inline-block;
  margin: 0;
  font-weight: 400;
  cursor: pointer;
  border-radius: 6px;
  background: var(--panel);
  color: var(--ink);
  border: 1px solid var(--rule);
  padding: 0.55rem 1.1rem;
}
input.file:focus-visible + label.button {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}
.actions.project {
  position: relative;
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--rule);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.25rem;
}
.actions button:not(.primary) {
  background: var(--panel);
  color: var(--ink);
  border: 1px solid var(--rule);
  padding: 0.55rem 1.1rem;
}

/* The printed list lives in print.css; on screen it is never shown. */
@media screen { .printout { display: none; } }

/* The worksheet: the options, the teacher's questions, and the sheet itself,
   shown as paper. The same element prints (print.css). */
.questions { margin: 1rem 0; }
.questions summary { cursor: pointer; font-weight: 600; }
.questions h3 { font-size: 0.95rem; }
.questions ol { margin: 0.25rem 0 0; padding-left: 1.75rem; }
.questions li { margin: 0.3rem 0; }

.sheet {
  margin-top: 1rem;
  padding: 2rem 2.25rem;
  background: #fff;
  color: #111;
  color-scheme: light;
  border: 1px solid var(--rule);
  border-radius: 4px;
  font: 16px/1.85 Georgia, "Times New Roman", serif;
  overflow-wrap: anywhere;
}
.sheet h1 { font-size: 1.35rem; margin: 0 0 0.2rem; }
.sheet h2 { font-size: 1.05rem; margin: 1.5rem 0 0.4rem; }
.sheet .source { color: #444; margin: 0; }
.sheet .who { display: flex; flex-wrap: wrap; gap: 0.5rem 2.5rem; margin: 1rem 0 0; }
.sheet .fill { display: inline-flex; align-items: baseline; gap: 0.4rem; }
.sheet .line { display: inline-block; width: 12em; border-bottom: 1px solid #111; }
.sheet .full-text p { margin: 0 0 0.6rem; }
.sheet .sample { margin: 1.5rem 0 0; padding-top: 0.75rem; border-top: 1px solid #555; font-style: italic; }
.sheet .bank ul {
  list-style: none;
  margin: 0;
  padding: 0.5rem 0.75rem;
  border: 1px solid #555;
  display: flex;
  flex-wrap: wrap;
  gap: 0.2rem 1.5rem;
}
.sheet .how { font-style: italic; margin: 0 0 0.5rem; }
.sheet .item { margin: 0 0 0.9rem; }
.sheet .item .n { font-weight: 700; }
/* One width for every gap, whatever it hides. */
.sheet .gap {
  display: inline-block;
  width: 7.5em;
  height: 1.3em;
  vertical-align: text-bottom;
  border-bottom: 1px solid #111;
  font: 0.7em/1 system-ui, sans-serif;
  color: #444;
}
.sheet .asked ol { margin: 0; padding-left: 1.5rem; }
.sheet .asked li { margin: 0 0 1.6rem; }
/* On screen the key's page break is a dashed line. */
.sheet .key { margin-top: 2rem; padding-top: 1rem; border-top: 2px dashed #999; }
.sheet .key ul { list-style: none; margin: 0; padding: 0; columns: 2; }
.sheet .key .n { display: inline-block; min-width: 2.5em; font-weight: 700; }

/* Settings and the licence key. Pro controls are greyed without a key, each
   with its "Part of Pro." line; nothing else is said about Pro. */
.settings {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
}
.settings summary { cursor: pointer; font-weight: 600; }
.settings h3 { margin-top: 1rem; }
.settings fieldset { border: 0; margin: 1.25rem 0 0; padding: 0; }
.settings legend { font-weight: 600; padding: 0; margin-bottom: 0.35rem; }
.settings textarea { min-height: 5rem; }
.settings .actions { margin-top: 0.75rem; }
label.choice { font-weight: 400; margin: 0.4rem 0; }
label.choice input { margin: 0 0.4rem 0 0; }
label.choice .why { display: block; margin-left: 1.6rem; color: var(--muted); font-size: 0.92rem; }
.licence-state { font-weight: 600; margin: 0.25rem 0 0; }
.upgrade { margin: 1.5rem 0 0; }
.pro-line { color: var(--muted); font-size: 0.92rem; margin: 0 0 0.35rem; }
.actions .pro-line { align-self: center; margin: 0; }
:disabled { cursor: not-allowed; }
.actions button[aria-disabled="true"] { opacity: 0.6; cursor: not-allowed; }
.actions button:disabled, .settings :disabled + span, fieldset:disabled { opacity: 0.6; }
input[type="text"]:disabled, textarea:disabled { opacity: 0.6; }

/* The per-card style control (Pro), from the extension's popup. */
.cards button.style {
  margin-left: 0.4rem;
  font-size: 0.8rem;
  padding: 0 0.45rem;
  border: 1px solid var(--rule);
  background: var(--panel);
  color: var(--muted);
  border-radius: 999px;
}
.cards button.style.asked { color: var(--accent); border-color: var(--accent); font-weight: 600; }

.confirm {
  max-width: 28rem;
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: var(--panel);
  color: var(--ink);
  padding: 1.25rem 1.5rem;
}
.confirm::backdrop { background: rgb(0 0 0 / 0.4); }
.confirm p { margin: 0; }

[hidden] { display: none !important; }

/* Phone width: each row becomes a small card; the sentence takes the width. */
@media (max-width: 40rem) {
  body { font-size: 16px; }
  .cards thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
  .cards tr {
    display: grid;
    grid-template-columns: 2rem auto 1fr;
    gap: 0.15rem 0.5rem;
    padding: 0.6rem 0;
    border-bottom: 1px solid var(--rule);
  }
  .cards th, .cards td { display: block; padding: 0; border: 0; width: auto; }
  .cards td.sentence { grid-column: 2 / -1; }
  .sheet { padding: 1.25rem 1rem; }
  .sheet .gap { width: 6em; }
  .sheet .key ul { columns: 1; }
}