:root {
  --ink: #1a1a1a;
  --muted: #666;
  --line: #d5d0c8;
  --paper: #faf8f4;
  --card: #fff;
  --accent: #14507a;
  --accent-soft: #e7eff5;
  --good: #1d7a45;
  --good-soft: #e3f3e9;
  --bad: #a3261f;
  --bad-soft: #fbeae8;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 16px;
  line-height: 1.45;
}

.wrap { max-width: 940px; margin: 0 auto; padding: 24px 20px 60px; }

a { color: var(--accent); }

header.top {
  border-bottom: 2px solid var(--ink);
  padding-bottom: 10px;
  margin-bottom: 22px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
header.top h1 { font-size: 26px; margin: 0; letter-spacing: .5px; }
header.top .crumb { font-size: 13px; color: var(--muted); }
header.top .crumb a { text-decoration: none; }

h2 {
  font-size: 15px; text-transform: uppercase; letter-spacing: 1.5px;
  margin: 26px 0 10px; padding-bottom: 4px; border-bottom: 1px solid var(--line);
}
h3 { font-size: 15px; margin: 18px 0 6px; }

.sub { color: var(--muted); font-size: 14px; margin: 0 0 18px; }

/* lesson grid */
.lessons { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
.lesson-card {
  display: block; background: var(--card); border: 1px solid var(--line);
  border-radius: 6px; padding: 10px 12px; text-decoration: none; color: inherit;
}
.lesson-card:hover { border-color: var(--accent); background: var(--accent-soft); }
.lesson-card .n { font-size: 12px; letter-spacing: 1px; text-transform: uppercase; color: var(--muted); }
.lesson-card .t { font-size: 15px; margin-top: 2px; }
.lesson-card .c { font-size: 12px; color: var(--muted); margin-top: 4px; }
.lesson-card.is-review { background: #f3f0ea; }

/* buttons */
.btn {
  display: inline-block; font: inherit; font-size: 15px; cursor: pointer;
  background: var(--card); color: var(--ink); border: 1px solid var(--line);
  border-radius: 6px; padding: 9px 16px; text-decoration: none;
}
.btn:hover { border-color: var(--accent); background: var(--accent-soft); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: #10405f; }
.btn.big { font-size: 18px; padding: 14px 24px; }
.btn:disabled { opacity: .45; cursor: default; }
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }

/* word groups */
.group { margin-bottom: 14px; }
.group .label { font-size: 13px; text-transform: uppercase; letter-spacing: 1px; color: var(--muted); margin-bottom: 4px; }
.words { display: flex; flex-wrap: wrap; gap: 6px; }
.word {
  background: var(--card); border: 1px solid var(--line); border-radius: 4px;
  padding: 3px 9px; font-size: 15px;
}
.word.say { cursor: pointer; }
.word.say:hover { border-color: var(--accent); background: var(--accent-soft); }

.note { border-left: 3px solid var(--line); padding: 6px 12px; margin: 12px 0; color: var(--muted); font-size: 14px; }

/* practice picker */
.picker { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 16px; margin-bottom: 18px; }
.checks { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 4px 14px; margin-top: 8px; }
.checks label { font-size: 14px; display: flex; gap: 7px; align-items: baseline; cursor: pointer; }
.checks input { margin: 0; }
.opt { display: flex; gap: 10px; align-items: center; margin: 10px 0; font-size: 15px; flex-wrap: wrap; }
.opt label { font-size: 15px; }
select, input[type=range] { font: inherit; }
select { padding: 5px; border: 1px solid var(--line); border-radius: 5px; background: #fff; }

/* test stage */
.stage { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 26px; text-align: center; }
.meter { display: flex; justify-content: space-between; font-size: 13px; color: var(--muted); margin-bottom: 18px; }
.bar { height: 5px; background: var(--line); border-radius: 3px; overflow: hidden; margin-bottom: 20px; }
.bar > i { display: block; height: 100%; background: var(--accent); width: 0; transition: width .25s; }
#answer {
  font-size: 34px; font-family: Georgia, serif; text-align: center;
  padding: 12px 16px; width: 100%; max-width: 480px;
  border: 2px solid var(--line); border-radius: 8px; background: #fff; color: var(--ink);
}
#answer:focus { outline: none; border-color: var(--accent); }
.feedback { min-height: 78px; margin-top: 16px; font-size: 19px; }
.feedback .right { color: var(--good); background: var(--good-soft); border-radius: 6px; padding: 10px 14px; display: inline-block; }
.feedback .wrong { color: var(--bad); background: var(--bad-soft); border-radius: 6px; padding: 10px 14px; display: inline-block; }
.feedback .answer { font-size: 30px; letter-spacing: 3px; display: block; margin-top: 6px; }
.feedback .hint { color: var(--muted); font-size: 14px; display: block; margin-top: 5px; letter-spacing: 0; }
.said { color: var(--muted); font-size: 15px; font-style: italic; min-height: 24px; margin-bottom: 14px; }

table.results { width: 100%; border-collapse: collapse; margin-top: 10px; font-size: 15px; }
table.results td, table.results th { border-bottom: 1px solid var(--line); padding: 6px 8px; text-align: left; }
table.results th { font-size: 12px; text-transform: uppercase; letter-spacing: 1px; color: var(--muted); }
.score { font-size: 40px; margin: 6px 0 0; }

.hide { display: none !important; }

/* ---------- number input ---------- */
input[type=number] {
  font: inherit; width: 5em; padding: 6px 8px; text-align: center;
  border: 1px solid var(--line); border-radius: 5px; background: #fff; color: var(--ink);
}

/* ---------- wide content never pushes the page sideways ---------- */
table.results { display: block; overflow-x: auto; white-space: normal; }

/* ---------- phones and small tablets ---------- */
@media (max-width: 700px) {
  body { font-size: 17px; }
  .wrap { padding: 16px 14px 48px; }

  header.top { margin-bottom: 16px; }
  header.top h1 { font-size: 22px; }

  /* one comfortable column of lessons rather than cramped cards */
  .lessons { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 8px; }
  .lesson-card { padding: 12px; }

  /* checkboxes stack so the labels stay readable and tappable */
  .checks { grid-template-columns: 1fr; gap: 2px; }
  .checks label { padding: 7px 2px; font-size: 16px; }
  .checks input { width: 20px; height: 20px; flex: none; }

  .picker { padding: 12px; }
  .opt { align-items: flex-start; flex-direction: column; gap: 6px; }
  .opt label { font-weight: normal; }
  input[type=range] { width: 100% !important; max-width: 100%; }
  select { max-width: 100%; }

  /* buttons big enough for a child's thumb */
  .btn { padding: 12px 18px; font-size: 16px; }
  .btn.big { font-size: 18px; padding: 14px 20px; }
  .row { gap: 8px; }

  .stage { padding: 16px 12px; }
  #answer { font-size: 30px; padding: 12px; }
  .feedback .answer { font-size: 26px; letter-spacing: 2px; }
  .said { font-size: 16px; }
  .score { font-size: 34px; }

  /* the three listen buttons share a row instead of wrapping awkwardly */
  .stage .row { flex-wrap: nowrap; }
  .stage .row .btn { flex: 1; padding: 12px 6px; font-size: 15px; }
}

@media (max-width: 420px) {
  .lessons { grid-template-columns: 1fr 1fr; }
  #answer { font-size: 26px; }
  .stage .row .btn { font-size: 14px; padding: 11px 4px; }
}

/* ---------- results: a mark beside every word ---------- */
table.results td.mark { width: 1.8em; text-align: center; font-weight: bold; font-size: 17px; }
table.results td.mark.ok { color: var(--good); }
table.results td.mark.no { color: var(--bad); }
table.results tr:has(td.mark.ok) td { background: var(--good-soft); }
table.results tr:has(td.mark.no) td { background: var(--bad-soft); }
table.results td.sent { color: var(--muted); font-size: 14px; }