:root {
  --ink: #183a35;
  --paper: #f8f7f1;
  --signal: #c5e86c;
  --sage: #68847a;
  --ok: #17652f;
  --bad: #a3231b;
  --bad-bg: #fbd9d6;
  --mono: ui-monospace, "Cascadia Mono", Consolas, "Courier New", monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: #111;
  font-family: Tahoma, Arial, sans-serif;
  font-size: 1.05rem;
  line-height: 1.8;
}

.site-header { padding: 1rem 1.5rem; border-bottom: 3px solid var(--signal); background: #fff; }
.logo { height: 40px; width: auto; display: block; }

main { max-width: 52rem; margin: 0 auto; padding: 1.5rem; }
h1 { color: var(--ink); margin: 0 0 1rem; }
h2 { color: var(--ink); margin-top: 2rem; }

.notice {
  border: 2px solid var(--sage);
  background: #fff;
  padding: 0.75rem 1rem;
  border-radius: 6px;
}
.notice p { margin: 0; }
.notice-error { border-color: var(--bad); background: var(--bad-bg); color: #5c0f0a; font-weight: bold; }
.notice-warn { border-color: #b26a00; background: #fff1d6; color: #5a3500; font-weight: bold; margin: 0 0 0.5rem; padding: 0.4rem 1rem; }
.test-warning { position: sticky; top: 0; z-index: 1; padding: 0.4rem 1rem; line-height: 1.5; }

.summary { color: var(--ink); font-weight: bold; }
.acknowledge { display: flex; gap: 0.6rem; align-items: center; margin: 1rem 0; cursor: pointer; }
.acknowledge input { width: 1.3rem; height: 1.3rem; }

.button {
  background: var(--ink);
  color: var(--paper);
  border: 2px solid var(--ink);
  border-radius: 6px;
  padding: 0.6rem 1.6rem;
  font: inherit;
  font-weight: bold;
  cursor: pointer;
}
.button:hover:not(:disabled) { background: #0f2724; }
.button:disabled { background: #c9ccc6; border-color: #c9ccc6; color: #4b4f4a; cursor: not-allowed; }
:focus-visible { outline: 3px solid var(--ink); outline-offset: 2px; }

.form { display: grid; gap: 0.4rem; max-width: 28rem; margin-top: 1rem; }
.form > div { display: grid; gap: 0.4rem; }
.form label { color: var(--ink); font-weight: bold; margin-top: 0.6rem; }
.form .notice { margin: 0; }
.form .button { justify-self: start; margin-top: 1rem; }
.field {
  width: 100%;
  padding: 0.6rem 0.75rem;
  font: inherit;
  color: #111;
  background: #fff;
  border: 2px solid var(--sage);
  border-radius: 6px;
}
.field[dir="ltr"] { text-align: left; }
.link-row { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; margin: 1rem 0; }
.link-row .field { flex: 1 1 18rem; width: auto; min-width: 0; font-family: var(--mono); font-size: 0.95rem; }
#screen-registered .notice { margin: 1rem 0; }

.test-bar { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 0 1.5rem; margin: 1rem 0 0.5rem; color: var(--ink); }

.passage {
  font-family: var(--mono);
  font-size: 1.15rem;
  line-height: 1.7;
  text-align: left;
  white-space: pre-wrap;
  max-height: 36vh;
  overflow: auto;
  background: #fff;
  border: 2px solid var(--ink);
  border-radius: 6px;
  padding: 1rem;
  user-select: none;
  -webkit-user-select: none;
  cursor: default;
}
.passage .ok { color: var(--ok); }
.passage .bad { color: var(--bad); background: var(--bad-bg); }
.passage .next { background: var(--signal); }

.typing {
  display: block;
  width: 100%;
  height: 28vh;
  min-height: 8rem;
  margin: 0.5rem 0;
  padding: 0.75rem;
  font-family: var(--mono);
  font-size: 1.1rem;
  text-align: left;
  color: #111;
  background: #fff;
  border: 2px solid var(--sage);
  border-radius: 6px;
  resize: none;
}
.typing:disabled { background: #eceae2; }

.result-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr)); gap: 0.75rem; margin: 1rem 0; }
.result-grid div { background: #fff; border: 2px solid var(--sage); border-radius: 6px; padding: 0.5rem 1rem; }
.result-grid dt { color: #3d4f49; font-size: 0.9rem; }
.result-grid dd { margin: 0; font-size: 1.4rem; font-weight: bold; color: var(--ink); }
.up { color: var(--ok); }
.down { color: var(--bad); }

.history { width: 100%; border-collapse: collapse; margin-bottom: 1.5rem; background: #fff; }
.history th, .history td { border: 1px solid var(--sage); padding: 0.35rem 0.6rem; text-align: start; }
.history th { background: var(--ink); color: var(--paper); }