/* AP Physics 1 study: flashcards + quick quiz (review/ pages). Uses the tokens from site.css (light and dark). */

.fc-links { margin: 0 0 12px; }
.fc-loading { color: var(--muted); }
.fc-app, .fc-index { min-width: 0; }

/* ---------- counts ---------- */
.fc-stats { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0; }
.fc-stat {
  display: flex; flex-direction: column; align-items: flex-start; min-width: 0;
  padding: 6px 14px; border-radius: 10px; border: 1px solid var(--line); background: var(--panel);
}
.fc-stat-n { font-size: 1.5rem; font-weight: 700; line-height: 1.1; font-variant-numeric: tabular-nums; }
.fc-stat-l { font-size: .85rem; color: var(--muted); }
.fc-s-due { border-color: var(--a); }
.fc-s-due .fc-stat-n { color: var(--a); }
.fc-s-due.fc-zero { border-color: var(--line); }
.fc-s-due.fc-zero .fc-stat-n { color: var(--muted); }
.fc-s-new .fc-stat-n { color: var(--x); }
.fc-s-learned .fc-stat-n { color: var(--ok); }
.fc-s-quiz .fc-stat-n { color: var(--ap); }
.fc-stats-sm .fc-stat { padding: 4px 10px; }
.fc-stats-sm .fc-stat-n { font-size: 1.2rem; }

.fc-meter { height: 8px; border-radius: 999px; background: var(--panel2); border: 1px solid var(--line); overflow: hidden; margin: 6px 0 14px; }
.fc-meter > i { display: block; height: 100%; width: 0; background: var(--ok); transition: width .3s; }

/* ---------- mode switch ---------- */
.fc-modes { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0 16px; }
.fc-mode { flex: 1 1 12rem; font-weight: 600; }
.fc-mode[aria-pressed="true"] { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.fc-mode[aria-pressed="true"]:hover { background: var(--accent); }

/* ---------- the card ---------- */
.fc-stage { max-width: 760px; }
.fc-card {
  position: relative; min-height: 220px; padding: 18px 20px; margin: 0 0 12px;
  background: var(--panel); border: 1px solid var(--line); border-left: 6px solid var(--x); border-radius: var(--radius);
  box-shadow: var(--shadow); cursor: pointer; display: flex; flex-direction: column; gap: 8px;
}
.fc-card.fc-flipped { border-left-color: var(--ok); cursor: default; }
.fc-meta { display: flex; flex-wrap: wrap; gap: 6px 12px; align-items: center; font-size: .9rem; }
.fc-topic { font-weight: 600; }
.fc-kind { padding: 1px 10px; border-radius: 999px; background: var(--panel2); border: 1px solid var(--line); color: var(--muted); }
.fc-pos { margin-left: auto; color: var(--muted); }
.fc-q { font-size: 1.25rem; font-weight: 600; margin: 4px 0; }
.fc-a { border-top: 2px dashed var(--line); padding-top: 10px; animation: fc-in .25s ease-out; }
.fc-a-label { margin: 0; font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; color: var(--ok); font-weight: 700; }
.fc-a-text { margin: 4px 0 0; font-size: 1.1rem; }
.fc-hint { margin: auto 0 0; font-size: .9rem; color: var(--muted); }
@keyframes fc-in { from { opacity: 0; transform: translateY(-4px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .fc-a { animation: none; } .fc-meter > i { transition: none; } }

.fc-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 8px; }
kbd {
  font-family: var(--mono); font-size: .75em; padding: 1px 6px; border-radius: 5px;
  border: 1px solid currentColor; opacity: .8;
}

.fc-grades { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; margin-bottom: 8px; }
.fc-grades[hidden] { display: none; }
.fc-grade { flex-direction: column; gap: 0; padding: 6px 4px; min-height: 64px; border-width: 2px; }
.fc-g-label { font-weight: 700; }
.fc-g-iv { font-size: .8rem; color: var(--muted); }
.fc-grade kbd { font-size: .7rem; margin-top: 2px; }
.fc-again { border-color: var(--bad); }  .fc-again .fc-g-label { color: var(--bad); }
.fc-hard { border-color: var(--warn); }  .fc-hard .fc-g-label { color: var(--warn); }
.fc-good { border-color: var(--ok); }    .fc-good .fc-g-label { color: var(--ok); }
.fc-easy { border-color: var(--info); }  .fc-easy .fc-g-label { color: var(--info); }
@media (max-width: 480px) { .fc-grades { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

.fc-status { min-height: 1.6em; color: var(--muted); margin: 4px 0; }
.fc-done { padding: 14px 18px; border-radius: var(--radius); background: var(--okbg); border: 1px solid var(--ok); max-width: 760px; }
.fc-done h2 { margin: 0 0 4px; font-size: 1.25rem; }
.fc-tools { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; }
.fc-reset.fc-armed { border-color: var(--bad); color: var(--bad); background: var(--badbg); }

.fc-list { margin: 16px 0; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); }
.fc-list > summary { cursor: pointer; padding: 10px 14px; font-weight: 600; min-height: 44px; }
.fc-list-ol { margin: 0; padding: 0 14px 12px 2.4em; }
.fc-list-ol li { margin: 8px 0; }
.fc-list-q { color: var(--ink); }
.fc-st { display: inline-block; font-size: .78rem; font-weight: 700; padding: 0 8px; border-radius: 999px; border: 1px solid var(--line); }
.fc-st-new { color: var(--x); }
.fc-st-due { color: var(--a); border-color: var(--a); }
.fc-st-ok { color: var(--ok); }

/* ---------- quiz ---------- */
.fc-quiz { max-width: 820px; }
.fc-quiz-intro h2 { margin-top: 0; }
.fc-quiz-head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; color: var(--muted); font-weight: 600; }
.fc-quiz-score { color: var(--ok); }
.fc-quiz-topic { margin: 6px 0; font-size: .9rem; }
.fc-quiz-q { font-size: 1.15rem; margin: 6px 0 12px; }
.fc-choices { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.fc-choice {
  width: 100%; justify-content: flex-start; text-align: left; gap: 12px; padding: 10px 14px; border-width: 2px;
}
.fc-choice-t { min-width: 0; }
.fc-letter {
  flex: 0 0 auto; display: inline-flex; align-items: center; justify-content: center; width: 30px; height: 30px;
  border-radius: 50%; background: var(--panel2); border: 1px solid var(--line); font-weight: 700;
}
.fc-choice:disabled { cursor: default; opacity: 1; }
.fc-choice.fc-right { border-color: var(--ok); background: var(--okbg); }
.fc-choice.fc-wrong { border-color: var(--bad); background: var(--badbg); }
.fc-choice.fc-right .fc-letter { background: var(--ok); color: var(--panel); border-color: var(--ok); }
.fc-choice.fc-wrong .fc-letter { background: var(--bad); color: var(--panel); border-color: var(--bad); }
.fc-quiz-fb { margin: 12px 0; padding: 10px 14px; border-radius: 10px; }
.fc-quiz-fb:empty { display: none; }
.fc-quiz-fb.ok { background: var(--okbg); border: 1px solid var(--ok); }
.fc-quiz-fb.bad { background: var(--badbg); border: 1px solid var(--bad); }
.fc-quiz-fb p { margin: 4px 0; }
.fc-ex { font-size: .98rem; }
.fc-missed { padding-left: 1.2em; }
.fc-missed li { margin: 10px 0; }
.fc-missed-a { color: var(--ok); }
.fc-quiz-result { margin-top: 0; }

/* ---------- review index ---------- */
.fc-total { margin: 16px 0; }
.fc-decks { display: grid; grid-template-columns: minmax(0, 1fr); gap: 16px; margin: 16px 0; }
@media (min-width: 700px) { .fc-decks { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 1050px) { .fc-decks { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.fc-deck {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 14px 16px; min-width: 0; border-top: 5px solid var(--line);
}
.fc-deck.fc-has-due { border-top-color: var(--a); }
.fc-deck h2 { font-size: 1.15rem; margin: 0 0 6px; display: flex; flex-direction: column; gap: 2px; }
.fc-deck-n { font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
.fc-deck-meta { font-size: .9rem; margin: 0 0 8px; }
.fc-deck-go { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 0; }
.fc-deck-go .btn { padding: 6px 12px; }
.fc-unit-link { font-size: .9rem; padding: 10px 2px; }