:root {
    --kr-bingo-background: #f4f1ed;
    --kr-bingo-border: #c9bdb3;
    --kr-bingo-title-background: #383438;
    --kr-bingo-title-color: #ffffff;
    --kr-bingo-letter-background: #786b70;
    --kr-bingo-letter-color: #ffffff;
    --kr-bingo-field-background: #ffffff;
    --kr-bingo-field-border: #d7cec7;
    --kr-bingo-field-color: #4c4649;
    --kr-bingo-accent: #8f6e77;
    --kr-bingo-done-background: #d8c7cc;
    --kr-bingo-done-border: #8f6e77;
    --kr-bingo-done-color: #40383b;
    --kr-bingo-check-color: #72525c;
}

/* --------------------------------------------
   Schreib-Bingo
-------------------------------------------- */

.kr-bingo {
    width: 100%;
    max-width: 760px;
    margin: 20px auto;
    padding: 18px;
    box-sizing: border-box;
    background: var(--kr-bingo-background, #f4f1ed);
    border: 1px solid var(--kr-bingo-border, #c9bdb3);
    border-radius: 6px;
}

.kr-bingo-title {
    margin-bottom: 35px;
    padding: 18px 15px;
    background: var(--kr-bingo-title-background, #383438);
    color: var(--kr-bingo-title-color, #ffffff);
    font-size: 18px;
    font-weight: bold;
    letter-spacing: 1px;
    text-align: center;
    text-transform: uppercase;
}

.kr-bingo-subtitle {
    display: block;
    margin-top: 5px;
    font-size: 9px;
    font-weight: normal;
    letter-spacing: 2px;
}

.kr-bingo-grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 6px;
}

.kr-bingo-letter {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 0;
    min-height: 42px;
    background: var(--kr-bingo-letter-background, #867a7e);
    color: var(--kr-bingo-letter-color, #ffffff);
    font-size: 20px;
    font-weight: bold;
    text-transform: uppercase;
}

.kr-bingo-field {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 0;
    min-height: 105px;
    padding: 10px;
    box-sizing: border-box;
    overflow: hidden;
    background: var(--kr-bingo-field-background, #ffffff);
    border: 1px solid var(--kr-bingo-field-border, #d7cec7);
    color: var(--kr-bingo-field-color, #4c4649);
    font-size: 12px;
    line-height: 1.5;
    text-align: center;
    overflow-wrap: anywhere;
}

/* Erledigtes Feld */

.kr-bingo-field:has(.kr-bingo-done-marker) {
    background: var(--kr-bingo-done-background, #d8c7cc);
    border-color: var(--kr-bingo-done-border, #8f6e77);
    color: var(--kr-bingo-done-color, #40383b);
}

.kr-bingo-done-marker {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 100%;
}

.kr-bingo-field:has(.kr-bingo-done-marker)::before {
    content: "✓";
    position: absolute;
    top: 5px;
    right: 7px;
    color: var(--kr-bingo-check-color, #72525c);
    font-size: 20px;
    font-weight: bold;
    line-height: 1;
}

.kr-bingo-field:has(.kr-bingo-done-marker)::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 10%;
    width: 80%;
    height: 1px;
    background: currentColor;
    opacity: 0.3;
    transform: rotate(-7deg);
}

/* Freies Feld */

.kr-bingo-field:has(.kr-bingo-free-marker) {
    background: var(--kr-bingo-free-background, #867a7e);
    border-color: var(--kr-bingo-free-background, #867a7e);
    color: var(--kr-bingo-free-color, #ffffff);
}

.kr-bingo-free-marker {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 100%;
    font-weight: bold;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.kr-bingo-footer {
    margin-top: 35px;
    color: var(--kr-bingo-footer-color, #6a6064);
    font-size: 10px;
    letter-spacing: 0.5px;
    text-align: center;
}

@media screen and (max-width: 700px) {
    .kr-bingo {
        padding: 10px;
    }

    .kr-bingo-grid {
        gap: 4px;
    }

    .kr-bingo-field {
        min-height: 90px;
        padding: 6px;
        font-size: 10px;
    }

    .kr-bingo-letter {
        min-height: 35px;
        font-size: 17px;
    }
}

@media screen and (max-width: 480px) {
    .kr-bingo {
        overflow-x: auto;
    }

    .kr-bingo-grid {
        min-width: 540px;
    }

    .kr-bingo-title,
    .kr-bingo-footer {
        min-width: 510px;
    }
}