body {
    font-family: "Comic Sans MS", "Comic Sans", cursive;
}

header {
    text-align: center;
}

.controls {
    width: min(900px, 92vw);
    margin: 24px auto;
    padding: clamp(20px, 4vw, 36px);

    display: flex;
    flex-direction: column;
    gap: 22px;

    border: 4px solid #2f66e8;
    border-radius: 24px;

    background: rgba(255, 255, 255, 0.96);

    box-sizing: border-box;

    box-shadow:
        0 10px 24px
        rgba(47, 102, 232, 0.15);
}

.controls > div {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.controls label,
.controls h3 {
    margin: 0;

    color: #172b63;

    font-size:
        clamp(18px, 2vw, 24px);

    font-weight: bold;
}

.controls input,
.controls select {
    width: 100%;
    min-height: 52px;

    padding: 10px 14px;

    border: 3px solid #b8d0ff;
    border-radius: 14px;

    background: white;

    color: #172b63;

    font: inherit;

    box-sizing: border-box;
}

.controls input:focus,
.controls select:focus {
    outline: 3px solid
        rgba(47, 102, 232, 0.2);

    border-color: #2f66e8;
}

.hidden {
  display: none;
}

#tagsContainer {

    display: grid;

    grid-template-columns:
        repeat(
            auto-fill,
            minmax(120px, 1fr)
        );

    gap: 8px;

    padding: 10px;

    border: 1px solid #ddd;

    border-radius: 8px;

    background: #f9f9f9;

    max-height: 200px;

    overflow-y: auto;

}

#tagsContainer label {

    display: flex;

    align-items: center;

    gap: 6px;

    padding: 6px;

    border: 1px solid #ddd;

    border-radius: 6px;

    background: white;

    cursor: pointer;

}

#tagsContainer label:hover {

    background: #eef7ff;

    border-color: #4da3ff;

}



#selectedItemsList {

    display: grid;

    grid-template-columns:
        repeat(
            auto-fill,
            minmax(100px, 1fr)
        );

    gap: 10px;

    max-height: 250px;

    overflow-y: auto;

    padding: 10px;

    border: 1px solid #ddd;

    border-radius: 8px;

    background: #f9f9f9;

}

.preview-item {

    border: 1px solid #ddd;

    padding: 8px;

    text-align: center;

    border-radius: 8px;

}

.preview-item img {

    width: 80px;

    height: 80px;

    object-fit: contain;

    display: block;

    margin: 0 auto 5px;

}

@media (max-width: 768px){

    .controls{

        flex-direction:column;

        gap:15px;

    }

}

@media (max-width:768px){

    #start-btn,
    #reset-btn{

        width:100%;

        font-size:24px;

    }

    .btn-container{

        flex-direction:column;

        gap:10px;

    }

}

@media (max-width:768px){

    #answer-buttons{

        flex-direction:column;

        align-items:center;

    }

    .answer-btn{

        width:90%;

    }

}

@media (max-width:768px){

    .preview-item img{

        width:60px;

        height:60px;

    }

}

.bingo-card{

    width:min(600px,95vw);

    aspect-ratio:1;

    display:grid;

    border:3px solid black;

    background:white;

    gap:0;

    margin:20px auto;

}

.bingo-card.grid-3{

    grid-template-columns:
        repeat(3,1fr);

}

.bingo-card.grid-4{

    grid-template-columns:
        repeat(4,1fr);

}

.bingo-wrapper{

    margin:30px auto;

    text-align:center;

}

.bingo-title{

    margin-bottom:12px;

    font-size:28px;

    font-weight:bold;

}

.bingo-cell{

    border:1px solid black;

    aspect-ratio:1 / 1;

    display:flex;

    flex-direction:column;

    justify-content:center;

    align-items:center;

    padding:6px;

    box-sizing:border-box;

    overflow:hidden;

}

.bingo-cell img{

    width:80%;

    height:65%;

    object-fit:contain;

    flex-shrink:0;

}

.bingo-cell p{

    margin:6px 0 0;

    font-weight:bold;

    font-size:14px;

    text-align:center;

}


#downloadPdfBtn{
  
  background-color: green;
}

#downloadPdfBtn.downloading{

    background:#888;

    cursor:not-allowed;

    opacity:.8;

}

.btn-container {
    width: min(900px, 92vw);
    margin: 24px auto;

    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
}

.btn-container button {
    width: min(420px, 100%);
    min-height: 60px;

    padding: 14px 24px;

    border: none;
    border-radius: 16px;

    color: white;

    font: inherit;
    font-size:
        clamp(18px, 2.2vw, 26px);

    font-weight: bold;

    cursor: pointer;

    box-shadow:
        0 6px 0
        rgba(0, 0, 0, 0.18);

    transition:
        transform 0.15s ease,
        box-shadow 0.15s ease;
}

.btn-container button:hover {
    transform: translateY(-2px);

    box-shadow:
        0 8px 0
        rgba(0, 0, 0, 0.18);
}

.btn-container button:active {
    transform: translateY(3px);

    box-shadow:
        0 3px 0
        rgba(0, 0, 0, 0.18);
}

#generateBtn {
    background: #16a85a;
}

#resetBtn {
    background: #ef4444;
}

#downloadPdfBtn {
    display: block;

    width: min(460px, 92vw);
    min-height: 66px;

    margin: 24px auto;
    padding: 16px 26px;

    border: none;
    border-radius: 18px;

    background: #2563eb;
    color: white;

    font: inherit;
    font-size:
        clamp(20px, 2.4vw, 28px);

    font-weight: bold;

    cursor: pointer;

    box-shadow:
        0 7px 0 #1747ad;
}

#downloadPdfBtn.hidden {
    display: none;
}

#downloadPdfBtn:active {
    transform: translateY(3px);
    box-shadow:
        0 4px 0 #1747ad;
}

#downloadPdfBtn.downloading {
    background: #888;
    box-shadow: none;
    cursor: not-allowed;
    opacity: 0.8;
}

#itemSelectionModeControl {
    margin: 0;
    padding: 18px;

    display: flex;
    flex-direction: column;
    gap: 12px;

    border: 3px solid #b8d0ff;
    border-radius: 16px;

    background: #f5f9ff;
}

#itemSelectionModeControl legend {
    padding: 0 8px;

    color: #172b63;

    font-size:
        clamp(18px, 2vw, 24px);

    font-weight: bold;
}

.item-mode-option {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 10px;

    padding: 10px 12px;

    border: 2px solid transparent;
    border-radius: 12px;

    background: white;

    cursor: pointer;
}

.item-mode-option:hover {
    border-color: #7aa7ff;
    background: #eef5ff;
}

.item-mode-option input {
    width: 22px;
    height: 22px;
    min-height: auto;
    margin: 0;

    flex: 0 0 auto;

    accent-color: #2563eb;
}

.item-mode-option span {
    flex: 1;

    color: #172b63;
    font-size: 18px;
    font-weight: bold;
}

.item-mode-note {
    margin: 4px 0 0;

    color: #53627f;
    line-height: 1.4;
}

.selectable-preview-item {
    appearance: none;

    width: 100%;

    font: inherit;
    color: inherit;

    cursor: pointer;

    transition:
        transform 0.15s ease,
        border-color 0.15s ease,
        background-color 0.15s ease,
        box-shadow 0.15s ease;
}

.selectable-preview-item:hover {
    transform: translateY(-2px);

    border-color: #2f66e8;

    box-shadow:
        0 5px 12px
        rgba(47, 102, 232, 0.18);
}

.selectable-preview-item.selected-item {
    border: 4px solid #16a85a;

    background: #dcfce7;

    box-shadow:
        0 0 0 3px
        rgba(22, 168, 90, 0.2);
}

.selectable-preview-item.selected-item::after {
    content: "Selected";

    display: block;

    margin-top: 6px;

    color: #08783c;

    font-size: 14px;
    font-weight: bold;
}

.resource-guide {
    width: min(1100px, 92vw);

    margin: 48px auto;
    padding: clamp(24px, 4vw, 42px);

    color: #172b63;
    background:
        rgba(255, 255, 255, 0.96);

    border: 4px solid #2f66e8;
    border-radius: 24px;

    box-sizing: border-box;

    box-shadow:
        0 10px 24px
        rgba(47, 102, 232, 0.15);
}

.resource-guide-heading {
    max-width: 820px;
    margin: 0 auto 28px;

    text-align: center;
}

.resource-guide-heading h2 {
    margin: 0 0 14px;

    color: #2458d3;

    font-size:
        clamp(26px, 3.4vw, 42px);
}

.resource-guide-heading p {
    margin: 0;

    color: #34466f;

    font-size:
        clamp(17px, 1.8vw, 21px);

    line-height: 1.65;
}

.resource-guide-grid {
    display: grid;

    grid-template-columns:
        repeat(3, minmax(0, 1fr));

    gap: 20px;
}

.resource-guide-grid article {
    padding: 22px;

    background: #f5f9ff;

    border: 3px solid #b8d0ff;
    border-radius: 18px;
}

.resource-guide-grid h3 {
    margin: 0 0 12px;

    color: #172b63;

    font-size:
        clamp(20px, 2vw, 25px);
}

.resource-guide-grid p,
.resource-guide-grid li {
    color: #405176;

    font-size: 17px;
    line-height: 1.55;
}

.resource-guide-grid ul,
.resource-guide-grid ol {
    margin: 0;
    padding-left: 24px;
}

.resource-guide-grid li + li {
    margin-top: 8px;
}

@media (max-width: 800px) {
    .resource-guide-grid {
        grid-template-columns: 1fr;
    }
}

@media print {
    .resource-guide {
        display: none;
    }
}