.contrast-checker-container {
    max-width: 700px;
    margin: 1rem auto;
    padding: 1.5rem 2rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--preview-bg);
}

.contrast-checker-container h2 {
    text-align: center;
    margin-bottom: 2rem;
    font-size: 1.4rem;
    color: var(--text-color);
}

.input-section {
    display: flex;
    flex-wrap: wrap;
    margin-bottom: 2rem;
    align-items: flex-start;
}

.input-group {
    width: 50%;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--label-text);
}

.color-input-wrapper {
    display: flex;
    align-items: center;
}

.color-input-wrapper input[type="text"] {
    flex-grow: 1;
    padding: 0.6rem 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: border-color 0.2s;
    font-family: monospace;
}
.color-input-wrapper input[type="text"]:focus {
    border-color: var(--accent-color);
    outline: none;
}

.color-input-wrapper input[type="color"] {
    height: 38px;
    width: 45px;
    padding: 0 3px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    background-color: var(--bg-color);
}

.color-input-wrapper input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}
.color-input-wrapper input[type="color"]::-webkit-color-swatch {
    border: none;
    border-radius: 3px;
}
.color-input-wrapper input[type="color"]::-moz-color-swatch {
     border: none;
     border-radius: 3px;
}

.error-message {
    color: var(--error-text);
    font-size: 0.85rem;
    margin-top: 0.4rem;
    min-height: 1.2em;
}

.control-button {
    padding: 0.7rem 1.5rem;
    background-color: var(--accent-color);
    color: var(--bg-color-light);
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: opacity 0.2s;
    flex-shrink: 0;
    margin-top: 1.7em;
    height: 38px; 
    align-self: flex-end;
}
body.dark-mode .control-button {
    color: var(--bg-color-dark);
}
.control-button:hover {
    opacity: 0.9;
}

#results-container {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px dashed var(--border-color);
}
#results-container.hidden {
    display: none;
}

#results-container h3 {
    text-align: center;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

#preview-area {
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    margin-bottom: 1.5rem;
    text-align: center;
    min-height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.3s, color 0.3s;
    background-color: #ffffff;
    color: #000000;
}

#preview-text {
    font-size: 1.2rem;
    margin: 0;
}

.results-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    grid-template-areas:
        "ratio ratio ratio ratio"
        "aa1 aa2 aaa1 aaa2";
    gap: 1rem;
    margin-bottom: 1rem;
}

.result-item {
    background-color: var(--bg-color);
    padding: 1rem;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    text-align: center;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
}
#ratio {grid-area: ratio;}
#aa1 {grid-area: aa1;}
#aa2 {grid-area: aa2;}
#aaa1 {grid-area: aaa1;}
#aaa2 {grid-area: aaa2;}
body.dark-mode .result-item {
     box-shadow: 0 1px 2px rgba(255,255,255,0.05);
}


.result-label {
    display: block;
    font-size: 0.8rem;
    color: var(--label-text);
    margin-bottom: 0.4rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.result-value {
    font-size: 3rem;
    font-weight: 700;
    color: var(--accent-color);
    line-height: 1.1;
}
body.dark-mode .result-value {
    color: var(--accent-color-dark);
}

.status-indicator {
    display: inline-block;
    font-size: 1.7rem;
    text-transform: uppercase;
    font-weight: bold;
    padding: 0.2em 0;
    line-height: 1;
    min-width: 50px;
}

.status-indicator.pass {
    color: #28a745;
}
body.dark-mode .status-indicator.pass {
    color: #34c759;
}

.status-indicator.fail {
    color: #dc3545;
}
body.dark-mode .status-indicator.fail {
     color: #ff453a;
}

.wcag-note {
    font-size: 0.85rem;
    text-align: center;
    color: var(--label-text);
    opacity: 0.8;
    margin-top: 1rem;
}

@media (max-width: 600px) {
    .contrast-checker-container {
        padding: 1rem 1.2rem;
    }
     .input-section {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
     }
     .input-group {
         width:100%;
     }
    .control-button {
        width: 100%;
        margin-top: 0.5rem;
    }
    .results-grid {
        grid-template-columns: 1fr 1fr;
        grid-template-rows: 1fr 1fr 1fr;
        grid-template-areas: 
            "ratio ratio"
            "aa1 aa2"
            "aaa1 aaa2";
        gap: 0.8rem;
    }
    .result-value { font-size: 3rem; }
    .status-indicator { font-size: 1.5rem; }
}