/* Flashcards page. Loaded only by that page, after site.css, and built on its
   tokens so both color schemes come for free. */

.fc-sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.fc-study { margin-bottom: 40px; }
.fc-toolbar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px 16px; margin-bottom: 12px; }
.fc-units { border: 0; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.fc-unit { display: inline-flex; align-items: center; gap: 6px; min-height: 40px; padding: 4px 12px; border: 1.5px solid var(--line-strong); border-radius: 999px; cursor: pointer; font-size: 0.95rem; background: var(--card); }
.fc-units-label { display: none; }
.fc-unit { white-space: nowrap; }
.fc-unit:has(input:checked) { border-color: var(--accent); background: var(--accent-tint); }
.fc-unit input, .fc-due input { accent-color: var(--accent); width: 18px; height: 18px; margin: 0; }
.fc-tools { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 14px; }
.fc-tools [aria-pressed="true"] { color: var(--accent); }
.fc-due { display: inline-flex; align-items: center; gap: 6px; font-size: 0.92rem; min-height: 40px; cursor: pointer; }
.fc-progress { color: var(--muted); font-size: 0.92rem; margin: 0 0 10px; min-height: 1.4em; }

/* The card. Both faces sit in one grid cell, so the card is as tall as its
   longer side and nothing is cut off on a phone. */
.fc-scene { perspective: 1400px; }
.fc-card { display: grid; position: relative; cursor: pointer; min-height: 15rem; transform-style: preserve-3d; transition: transform 0.45s cubic-bezier(0.3, 0.7, 0.3, 1); border-radius: 14px; outline: none; -webkit-tap-highlight-color: transparent; touch-action: pan-y; user-select: none; }
.fc-card.is-flipped { transform: rotateY(180deg); }
.fc-card:focus-visible { box-shadow: 0 0 0 3px var(--focus); }
.fc-face { grid-area: 1 / 1; display: flex; flex-direction: column; justify-content: center; padding: 26px 28px; border-radius: 14px; background: var(--card); border: 1.5px solid var(--line-strong); box-shadow: var(--shadow); backface-visibility: hidden; -webkit-backface-visibility: hidden; }
.fc-face-front { border-top: 5px solid var(--accent); }
.fc-face-back { transform: rotateY(180deg); background: var(--page); border-top: 5px solid var(--good); }
.fc-kicker { font-size: 0.8rem; font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase; color: var(--accent); margin: 0 0 10px; }
.fc-face-back .fc-kicker { color: var(--good); }
.fc-face .fc-text { font-size: 1.18rem; line-height: 1.55; color: var(--ink); }
.fc-face-back .fc-text { font-size: 1.05rem; color: var(--body); }
.fc-face .fc-text > :first-child { margin-top: 0; }
.fc-face .fc-text > :last-child { margin-bottom: 0; }
.fc-hint { margin: 16px 0 0; font-size: 0.85rem; color: var(--muted); }

.fc-controls { display: flex; align-items: center; justify-content: center; gap: 10px; margin-top: 16px; }
.fc-controls .fc-nav { min-width: 52px; font-size: 1.2rem; }
.fc-controls .fc-flip, .fc-controls .fc-rate { min-width: 8.5rem; }
.fc-review { text-align: center; font-size: 0.92rem; color: var(--muted); margin: 12px 0 0; }
.fc-keys { text-align: center; color: var(--muted); font-size: 0.85rem; margin: 10px 0 0; }
.fc-done { padding: 18px 20px; border-radius: 14px; background: var(--good-tint); border: 1px solid var(--line); }
.fc-done p { margin: 0.35em 0; }
.fc-done-title { font-weight: 700; color: var(--ink); font-size: 1.05rem; }
.fc-done-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 12px !important; }
.fc-reset { text-align: center; margin: 6px 0 0; }

/* Reduced motion: no turn, the faces simply swap. */
@media (prefers-reduced-motion: reduce) {
  .fc-card { transition: none; transform: none !important; }
  .fc-face-back { transform: none; visibility: hidden; }
  .fc-card.is-flipped .fc-face-back { visibility: visible; }
  .fc-card.is-flipped .fc-face-front { visibility: hidden; }
}

/* The full list, for reading every card at once and for search engines. */
.fc-all { border-top: 1px solid var(--line); padding-top: 8px; }
.fc-unit-title { margin-top: 28px; }
.fc-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.fc-list li + li { margin-top: 0; }
.fc-item details { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); }
.fc-item summary { cursor: pointer; padding: 12px 16px; list-style: none; }
.fc-item summary::-webkit-details-marker { display: none; }
.fc-item summary::after { content: "Show answer"; display: block; margin-top: 6px; font-size: 0.85rem; font-weight: 650; color: var(--brand); }
.fc-item details[open] summary::after { content: "Hide answer"; }
.fc-item .fc-kicker { display: block; font-size: 0.8rem; }
.fc-item .fc-front { color: var(--ink); }
.fc-item .fc-back { padding: 0 16px 12px; border-top: 1px solid var(--line); }
.fc-item .fc-review { text-align: left; }

@media (max-width: 560px) {
  .fc-toolbar { gap: 6px; margin-bottom: 6px; }
  .fc-units { gap: 5px; }
  .fc-unit { min-height: 36px; padding: 2px 8px; gap: 4px; font-size: 0.84rem; }
  .fc-unit input { width: 15px; height: 15px; }
  .fc-units { align-items: center; }
  .fc-units-label { display: inline; font-size: 0.86rem; font-weight: 650; color: var(--ink); margin-right: 2px; }
  .fc-unit-word { display: none; }
  .fc-tools { width: 100%; justify-content: space-between; }
  .fc-due { min-height: 36px; font-size: 0.86rem; }
  .fc-progress { margin-bottom: 6px; }
  .fc-controls { margin-top: 10px; gap: 8px; }
  .fc-face { padding: 20px 18px; }
  .fc-card { min-height: 13rem; }
  .fc-face .fc-text { font-size: 1.08rem; }
  .fc-controls .fc-flip, .fc-controls .fc-rate { min-width: 0; flex: 1 1 auto; }
  .fc-keys { display: none; }
}
@media (max-width: 560px) and (max-height: 700px) {
  .fc-card { min-height: 9rem; }
  .fc-hint { margin-top: 10px; }
}