/* Flip cards ("Wendekacheln", app/templates.php render_flipcards(), assets/flipcards.js). */
.flipcards {
    --flip-back: var(--green, #245c4e);
    display: grid;
    grid-template-columns: repeat(var(--flip-cols, 3), minmax(0, 1fr));
    gap: 20px;
    margin: 0;
}
.flipcard { height: var(--flip-height, 280px); perspective: 1200px; }
.flipcard-inner { position: relative; width: 100%; height: 100%; transform: rotateY(0deg); transform-style: preserve-3d; transition: transform .7s cubic-bezier(.4, .2, .2, 1); will-change: transform; }
.flipcard.is-flipped .flipcard-inner,
.flipcards[data-trigger="hover"] .flipcard:hover .flipcard-inner,
.flipcards[data-trigger="hover"] .flipcard:has(:focus-visible) .flipcard-inner { transform: rotateY(180deg); }
/* After a click on the back in hover mode the card may turn back although the mouse is over it. */
.flipcards[data-trigger="hover"] .flipcard.is-unflipped .flipcard-inner { transform: rotateY(0deg); }

.flipcard-face {
    position: absolute;
    inset: 0;
    display: flex;
    overflow: hidden;
    flex-direction: column;
    box-sizing: border-box;
    border-radius: 16px;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}
.flipcard-front {
    align-items: center;
    justify-content: center;
    gap: 14px;
    width: 100%;
    margin: 0;
    padding: 22px;
    border: 1px solid var(--line, #e6ebe7);
    background: #fff;
    color: var(--ink, #1d312d);
    font: inherit;
    text-align: center;
    cursor: pointer;
    box-shadow: 0 6px 20px rgba(20, 40, 30, .07);
}
.flipcard-front:hover { box-shadow: 0 10px 28px rgba(20, 40, 30, .12); }
.flipcard-front:focus-visible { outline: 3px solid var(--flip-back); outline-offset: 3px; }
.flipcard-front img { max-width: 100%; max-height: 70%; flex: 0 1 auto; object-fit: contain; }
.flipcard-front:not(:has(.flipcard-title)) img { max-height: 100%; }
.flipcard-title { font-size: 1.25rem; font-weight: 700; line-height: 1.25; }
.flipcard-front:not(.has-image) .flipcard-title { font-size: 1.5rem; }
.flipcard-hint { position: absolute; right: 12px; bottom: 10px; display: grid; width: 28px; height: 28px; place-items: center; border-radius: 50%; background: var(--mint, #edf4ee); color: var(--flip-back); font-size: 15px; }

.flipcard-back {
    gap: 10px;
    padding: 22px 22px 18px;
    background: var(--flip-back);
    color: #fff;
    text-align: left;
    transform: rotateY(180deg);
}
.flipcard-back h3 { margin: 0; color: inherit; font-size: 1.15rem; line-height: 1.3; }
.flipcard-back p { margin: 0; color: inherit; font-size: .95rem; line-height: 1.55; opacity: .95; }
.flipcard-link { align-self: flex-start; margin-top: auto; padding: 8px 14px; border-radius: 999px; background: #fff; color: var(--flip-back); font-size: .9rem; font-weight: 700; text-decoration: none; }
.flipcard-link:hover { text-decoration: underline; }
.flipcard-back-button { position: absolute; right: 10px; bottom: 10px; display: grid; width: 30px; height: 30px; place-items: center; padding: 0; border: 1px solid rgba(255, 255, 255, .5); border-radius: 50%; background: transparent; color: inherit; font-size: 15px; cursor: pointer; }
.flipcard-back-button:hover, .flipcard-back-button:focus-visible { background: rgba(255, 255, 255, .18); outline: none; }
.flipcard-back:has(.flipcard-link) .flipcard-back-button { bottom: 14px; }

/* Without motion: the sides swap without turning. */
@media (prefers-reduced-motion: reduce) {
    .flipcard-inner { transition: none; }
}

@media (max-width: 900px) {
    .flipcards { grid-template-columns: repeat(min(var(--flip-cols, 3), 2), minmax(0, 1fr)); }
}
@media (max-width: 560px) {
    .flipcards { grid-template-columns: minmax(0, 1fr); gap: 14px; }
}