/* De fire regnearter – i westersoe.com's stil (tavlegrøn, gul sol, koral, creme).
   Alt er afgrænset til .fr-app, så temaet på resten af siden ikke påvirkes. */
.fr-app {
  --fr-ink: #1f2933;
  --fr-muted: #5b6770;
  --fr-bg: #fffdf8;
  --fr-card: #ffffff;
  --fr-teal: #0f6b6b;
  --fr-teal-d: #0a4c4c;
  --fr-sun: #ffc93c;
  --fr-sun-d: #e0a800;
  --fr-coral: #ff6b5a;
  --fr-line: #e8e2d4;
  --fr-r: 16px;
  /* regneartsfarver */
  --fr-plus: #0f6b6b;
  --fr-minus: #d9503f;
  --fr-gange: #ffc93c;
  --fr-division: #2f6f9f;
  max-width: 680px;
  margin: 24px auto;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--fr-ink);
  line-height: 1.45;
}
.fr-app *, .fr-app *::before, .fr-app *::after { box-sizing: border-box; }

.fr-app .fr-card {
  background: var(--fr-card);
  border: 1px solid var(--fr-line);
  border-radius: var(--fr-r);
  padding: 28px 24px;
  box-shadow: 0 6px 20px rgba(10, 76, 76, .08);
  text-align: center;
  transition: border-color .2s, box-shadow .2s;
  overflow: hidden;
}
.fr-app h2 { margin: 6px 0 8px; font-size: 1.9em; line-height: 1.15; color: var(--fr-teal); font-weight: 800; }
.fr-app .fr-lead { color: var(--fr-muted); margin: 0 0 8px; font-size: 1.05em; }

/* ---------- Startskærm: tavle ---------- */
.fr-app .fr-login { padding: 0; }
.fr-app .fr-board {
  position: relative;
  background: radial-gradient(ellipse at 30% 20%, #157a7a 0%, var(--fr-teal) 45%, var(--fr-teal-d) 100%);
  color: #fff;
  padding: 30px 24px 28px;
  min-height: 240px;
  display: flex; align-items: center; justify-content: center;
}
.fr-app .fr-board-art { position: absolute; inset: 0; width: 100%; height: 100%; }
.fr-app .fr-board-text { position: relative; z-index: 1; max-width: 460px; }
.fr-app .fr-board h2 { color: #fff; font-size: 2.2em; margin: 12px 0 6px; text-shadow: 0 2px 0 rgba(0,0,0,.15); }
.fr-app .fr-board .fr-lead { color: #d7ecec; }
.fr-app .fr-login-form { padding: 6px 24px 28px; }

.fr-app .fr-signs { display: flex; justify-content: center; gap: 10px; }
.fr-app .fr-signs span {
  width: 50px; height: 50px; border-radius: 14px;
  font-size: 32px; font-weight: 800; line-height: 48px;
  box-shadow: 0 4px 0 rgba(0,0,0,.18);
}
.fr-app .fr-signs .fr-plus { background: #fff; color: var(--fr-teal); transform: rotate(-6deg); }
.fr-app .fr-signs .fr-minus { background: var(--fr-coral); color: #fff; transform: rotate(4deg); }
.fr-app .fr-signs .fr-gange { background: var(--fr-sun); color: var(--fr-ink); transform: rotate(-3deg); }
.fr-app .fr-signs .fr-division { background: #8fd0e8; color: var(--fr-teal-d); transform: rotate(7deg); }

.fr-app .fr-label { display: block; font-weight: 700; margin: 18px 0 8px; font-size: 1.05em; color: var(--fr-ink); }
.fr-app .fr-input {
  font: inherit; font-size: 1.4em; font-weight: 700;
  padding: 10px 14px; width: 100%; max-width: 320px;
  border: 2px solid var(--fr-line); border-radius: 12px;
  background: var(--fr-bg); color: var(--fr-ink); text-align: center;
  outline: none;
}
.fr-app .fr-input:focus { border-color: var(--fr-teal); background: #fff; box-shadow: 0 0 0 4px rgba(15,107,107,.12); }

.fr-app .fr-ops { border: 0; padding: 0; margin: 0; display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; }
.fr-app .fr-ops legend { width: 100%; }
.fr-app .fr-chip { cursor: pointer; }
.fr-app .fr-chip input { position: absolute; opacity: 0; pointer-events: none; }
.fr-app .fr-chip span {
  display: inline-block; padding: 8px 16px; border-radius: 999px;
  border: 2px solid var(--fr-line); font-weight: 700; color: var(--fr-muted); background: #fff;
}
.fr-app .fr-chip input:focus-visible + span { outline: 3px solid var(--fr-teal); outline-offset: 2px; }
.fr-app .fr-chip.fr-plus input:checked + span { border-color: var(--fr-plus); background: var(--fr-plus); color: #fff; }
.fr-app .fr-chip.fr-minus input:checked + span { border-color: var(--fr-minus); background: var(--fr-minus); color: #fff; }
.fr-app .fr-chip.fr-gange input:checked + span { border-color: var(--fr-sun-d); background: var(--fr-gange); color: var(--fr-ink); }
.fr-app .fr-chip.fr-division input:checked + span { border-color: var(--fr-division); background: var(--fr-division); color: #fff; }

/* Knapper som "Se ideer til skolen" på forsiden: gul pille */
.fr-app .fr-btn {
  font: inherit; font-size: 1.15em; font-weight: 800;
  margin-top: 18px; padding: 12px 30px; border: 0; border-radius: 999px;
  background: var(--fr-sun); color: var(--fr-ink); cursor: pointer;
  box-shadow: 0 4px 0 var(--fr-sun-d); transition: transform .08s, box-shadow .08s, filter .15s;
}
.fr-app .fr-btn:hover { filter: brightness(1.05); }
.fr-app .fr-btn:active { transform: translateY(3px); box-shadow: 0 1px 0 var(--fr-sun-d); }
.fr-app .fr-btn:disabled { opacity: .55; cursor: default; transform: none; }
.fr-app .fr-btn-ghost { background: #fff; color: var(--fr-teal); border: 2px solid var(--fr-teal); box-shadow: 0 4px 0 rgba(15,107,107,.2); }
.fr-app .fr-error { color: var(--fr-minus); font-weight: 700; min-height: 1.4em; margin: 10px 0 0; }

/* ---------- Opgaveskærm ---------- */
.fr-app .fr-top { display: flex; justify-content: space-between; align-items: center; font-weight: 700; gap: 8px; }
.fr-app .fr-who { color: var(--fr-teal); }
.fr-app .fr-count { font-size: 1.1em; }
.fr-app .fr-score { color: var(--fr-sun-d); }
.fr-app .fr-bar { height: 12px; background: #f1ede2; border-radius: 999px; margin: 10px 0 18px; overflow: hidden; }
.fr-app .fr-bar span { display: block; height: 100%; background: linear-gradient(90deg, var(--fr-teal), var(--fr-sun)); border-radius: 999px; transition: width .4s; }

.fr-app .fr-optag { display: inline-block; padding: 4px 16px; border-radius: 999px; color: #fff; font-weight: 800; }
.fr-app .fr-optag.fr-plus, .fr-app .fr-dot.fr-plus { background: var(--fr-plus); color: #fff; }
.fr-app .fr-optag.fr-minus, .fr-app .fr-dot.fr-minus { background: var(--fr-minus); color: #fff; }
.fr-app .fr-optag.fr-gange, .fr-app .fr-dot.fr-gange { background: var(--fr-gange); color: var(--fr-ink); }
.fr-app .fr-optag.fr-division, .fr-app .fr-dot.fr-division { background: var(--fr-division); color: #fff; }

.fr-app .fr-level { display: flex; justify-content: center; align-items: center; gap: 8px; margin: 10px 0 4px; color: var(--fr-muted); font-size: .9em; font-weight: 700; }
.fr-app .fr-dots { display: inline-flex; gap: 4px; }
.fr-app .fr-dots i { width: 10px; height: 10px; border-radius: 50%; background: var(--fr-line); display: inline-block; }
.fr-app .fr-dots i.on { background: var(--fr-teal); }

/* Selve stykket står på en lille tavle */
.fr-app .fr-problem {
  display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 12px;
  margin: 16px 0 6px; padding: 22px 16px;
  background: linear-gradient(160deg, #157a7a, var(--fr-teal-d));
  border-radius: 14px; border: 6px solid #c99b5f; /* trækant om tavlen */
  box-shadow: inset 0 0 30px rgba(0,0,0,.25);
}
.fr-app .fr-expr { font-size: 2.8em; font-weight: 800; letter-spacing: .03em; white-space: nowrap; color: #fff; text-shadow: 0 0 1px rgba(255,255,255,.6); }
.fr-app .fr-answer { width: 160px; font-size: 2.2em; padding: 6px 10px; background: #fff; border-color: #fff; }
.fr-app .fr-answer:focus { border-color: var(--fr-sun); box-shadow: 0 0 0 4px rgba(255,201,60,.35); }
.fr-app .fr-problem .fr-btn { margin-top: 0; }

.fr-app .fr-feedback { min-height: 3em; margin: 14px 0 0; font-size: 1.15em; font-weight: 700; }
.fr-app .fr-ok { color: var(--fr-teal); }
.fr-app .fr-no { color: var(--fr-minus); }
.fr-app .fr-up, .fr-app .fr-down { display: block; font-size: .85em; color: var(--fr-muted); margin-top: 4px; }

.fr-app .fr-flash-ok { border-color: var(--fr-teal); box-shadow: 0 6px 20px rgba(15,107,107,.25); animation: fr-pop .35s; }
.fr-app .fr-flash-no { border-color: var(--fr-coral); box-shadow: 0 6px 20px rgba(255,107,90,.25); animation: fr-shake .35s; }
@keyframes fr-pop { 50% { transform: scale(1.02); } }
@keyframes fr-shake { 25% { transform: translateX(-6px); } 75% { transform: translateX(6px); } }

/* ---------- Slutskærm ---------- */
.fr-app .fr-trophy { font-size: 56px; }
.fr-app .fr-big { font-size: 1.8em; font-weight: 800; margin: 0 0 16px; color: var(--fr-teal); }
.fr-app .fr-table { width: 100%; max-width: 440px; margin: 0 auto 12px; border-collapse: collapse; }
.fr-app .fr-table th, .fr-app .fr-table td { padding: 8px 10px; border-bottom: 1px solid var(--fr-line); text-align: left; }
.fr-app .fr-table th { color: var(--fr-muted); font-size: .9em; }
.fr-app .fr-dot { display: inline-block; width: 26px; height: 26px; border-radius: 8px; text-align: center; font-weight: 800; line-height: 26px; }
.fr-app .fr-wrong { text-align: left; max-width: 440px; margin: 8px auto; }
.fr-app .fr-wrong summary { cursor: pointer; font-weight: 700; color: var(--fr-teal); }
.fr-app .fr-wrong ul { columns: 2; padding-left: 20px; }
.fr-app .fr-wrong s { color: var(--fr-minus); margin-left: 6px; }
.fr-app .fr-actions { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }

@media (max-width: 480px) {
  .fr-app .fr-card { padding: 20px 16px; }
  .fr-app .fr-login { padding: 0; }
  .fr-app .fr-login-form { padding: 4px 16px 22px; }
  .fr-app .fr-board h2 { font-size: 1.7em; }
  .fr-app .fr-expr { font-size: 2.1em; }
  .fr-app .fr-answer { width: 120px; font-size: 1.8em; }
  .fr-app .fr-wrong ul { columns: 1; }
}
@media (prefers-reduced-motion: reduce) {
  .fr-app * { animation: none !important; transition: none !important; }
}

/* ---------- Træn geometri ---------- */
.fr-app .geo-signs { display: flex; justify-content: center; gap: 10px; }
.fr-app .geo-signs svg { width: 50px; height: 50px; border-radius: 14px; padding: 6px; box-shadow: 0 4px 0 rgba(0,0,0,.18); }
.fr-app .geo-signs svg:nth-child(1) { background: #fff; transform: rotate(-6deg); }
.fr-app .geo-signs svg:nth-child(2) { background: var(--fr-coral); transform: rotate(4deg); }
.fr-app .geo-signs svg:nth-child(3) { background: var(--fr-sun); transform: rotate(-3deg); }
.fr-app .geo-signs svg:nth-child(4) { background: #8fd0e8; transform: rotate(7deg); }
.fr-app .geo-signs svg * { fill: none; stroke: var(--fr-teal-d); stroke-width: 4; stroke-linejoin: round; }
.fr-app .geo-signs svg:nth-child(2) * { stroke: #fff; }
.fr-app .geo-q { font-size: 1.15em; font-weight: 700; margin: 12px 0 8px; }
.fr-app .geo-figure { background: #fff; border: 6px solid #c99b5f; border-radius: 14px; padding: 6px; box-shadow: inset 0 0 0 1px var(--fr-line); }
.fr-app .geo-svg { display: block; width: 100%; height: auto; max-height: 300px; }
.fr-app .geo-lbl { font: 700 15px system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; fill: var(--fr-ink); paint-order: stroke; stroke: #fff; stroke-width: 4px; }
.fr-app .geo-answer { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 10px; margin-top: 14px; }
.fr-app .geo-answer .fr-btn { margin-top: 0; }
.fr-app .geo-unit { font-size: 1.4em; font-weight: 800; color: var(--fr-teal); }
.fr-app .geo-choices { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 14px; }
.fr-app .geo-choice {
  font: inherit; font-size: 1.1em; font-weight: 700; padding: 14px 10px; border-radius: 12px; cursor: pointer;
  border: 2px solid var(--fr-line); background: var(--fr-bg); color: var(--fr-ink); text-transform: none;
}
.fr-app .geo-choice:hover:not(:disabled) { border-color: var(--fr-teal); background: #fff; }
.fr-app .geo-choice:disabled { cursor: default; opacity: .7; }
.fr-app .geo-choice.is-right { border-color: var(--fr-teal); background: var(--fr-teal); color: #fff; opacity: 1; }
.fr-app .geo-choice.is-wrong { border-color: var(--fr-minus); background: var(--fr-minus); color: #fff; opacity: 1; }
@media (max-width: 480px) { .fr-app .geo-choices { grid-template-columns: 1fr; } }