.kkg-level-picker, .kkg-image-chooser {
    text-align: center;
    padding: 20px 0;
}
.kkg-btn {
    display: inline-block;
    margin: 6px;
    padding: 10px 18px;
    background: #ff8c1a;
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 15px;
    cursor: pointer;
}
.kkg-btn:hover {
    background: #e67700;
}
.kkg-puzzle-preview {
    max-width: 240px;
    display: block;
    margin: 0 auto 10px;
    border-radius: 6px;
}
.kkg-image-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
}
.kkg-image-choice {
    width: 90px;
    height: 90px;
    object-fit: cover;
    border-radius: 6px;
    cursor: pointer;
    border: 3px solid transparent;
}
.kkg-image-choice:hover {
    border-color: #ff8c1a;
}

.kkg-status {
    font-size: 16px;
    margin-bottom: 10px;
    text-align: center;
}
.kkg-status .kkg-timer {
    font-weight: bold;
}

.kkg-pexeso-board {
    display: grid;
    gap: 8px;
    max-width: 780px;
    margin: 0 auto;
}
.kkg-card {
    aspect-ratio: 1 / 1;
    cursor: pointer;
    perspective: 600px;
}
.kkg-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.35s;
    transform-style: preserve-3d;
}
.kkg-card.kkg-open .kkg-card-inner,
.kkg-card.kkg-matched .kkg-card-inner {
    transform: rotateY(180deg);
}
.kkg-card-face {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 6px;
    overflow: hidden;
}
.kkg-card-back {
    background: #ff8c1a url(/www/flash/images/pexeso_back.png) center/cover no-repeat;
}
.kkg-card-front {
    transform: rotateY(180deg);
    background: #fff;
}
.kkg-card-front img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
.kkg-card.kkg-matched {
    opacity: 0.55;
}

.kkg-puzzle-board {
    margin: 0 auto;
    background: #eee;
    border: 2px solid #ccc;
}
.kkg-puzzle-tile {
    box-sizing: border-box;
    border: 1px solid rgba(255,255,255,0.4);
    cursor: pointer;
}
.kkg-puzzle-blank {
    background: #fff !important;
    cursor: default;
}

.kkg-result {
    text-align: center;
    padding: 20px;
}
.kkg-result-time {
    font-size: 18px;
}
.kkg-save-form label {
    display: inline-block;
    margin: 4px 10px;
}
.kkg-save-form input {
    padding: 4px 6px;
}
.kkg-saved-msg {
    color: green;
    margin-left: 8px;
    font-weight: bold;
}
.kkg-score-table {
    margin: 10px auto;
    border-collapse: collapse;
}
.kkg-score-table th, .kkg-score-table td {
    padding: 4px 12px;
    border-bottom: 1px solid #ddd;
}