:root {
    --key-size: 40px;
    --key-gap: 3px;
    --key-font-size: 14px;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f5f5;
    margin: 0;
    padding: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 1200px;
    padding: 10px;
    box-sizing: border-box;
}

h1 {
    text-align: center;
    color: #333;
    margin: 10px 0;
    font-size: clamp(1.5rem, 4vw, 2rem);
}

.keyboard {
    background-color: #e0e0e0;
    border-radius: 10px;
    padding: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    overflow-x: auto;
}

.row {
    display: flex;
    margin-bottom: var(--key-gap);
    justify-content: center;
    flex-wrap: nowrap;
    min-width: min-content;
}

.key {
    background-color: #fff;
    border: 1px solid #ccc;
    border-radius: 4px;
    padding: 5px;
    margin: 0 var(--key-gap);
    text-align: center;
    font-size: var(--key-font-size);
    font-weight: bold;
    min-width: var(--key-size);
    height: var(--key-size);
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    transition: all 0.1s ease;
    cursor: pointer;
    user-select: none;
    flex-shrink: 0;
    box-sizing: border-box;
}

.key:hover {
    background-color: #f0f0f0;
}

.key.active {
    background-color: #4CAF50;
    color: white;
    transform: translateY(2px);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.wide {
    min-width: calc(var(--key-size) * 2);
}

.x-wide {
    min-width: calc(var(--key-size) * 2.5);
}

.xx-wide {
    min-width: calc(var(--key-size) * 3);
}

.xxx-wide {
    min-width: calc(var(--key-size) * 7.5);
}

.spacer {
    background-color: transparent;
    box-shadow: none;
    border: none;
    min-width: calc(var(--key-size) / 2);
}

.output {
    margin-top: 20px;
    padding: 15px;
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    text-align: center;
    font-size: clamp(0.9rem, 3vw, 1rem);
}

.output p {
    margin: 8px 0;
    color: #333;
}

.output span {
    font-weight: bold;
    color: #4CAF50;
}

.mobile-notice {
    text-align: center;
    margin-top: 15px;
    font-size: 0.9rem;
    color: #666;
    display: none;
}

/* Special key styling */
.key[data-key^="Numpad"] {
    background-color: #f8f8f8;
}

.key[data-key^="Arrow"] {
    background-color: #f0f8ff;
}

.key[data-key^="F"] {
    background-color: #fff8f8;
}

.key[data-key$="Left"],
.key[data-key$="Right"] {
    background-color: #f0f0f0;
}

/* Responsive adjustments */
@media (max-width: 1200px) {
    :root {
        --key-size: 35px;
        --key-font-size: 12px;
    }
    
    .key {
        padding: 3px;
    }
    
    .xxx-wide {
        min-width: calc(var(--key-size) * 6);
    }
}

@media (max-width: 900px) {
    :root {
        --key-size: 30px;
        --key-font-size: 10px;
    }
    
    .key {
        padding: 2px;
    }
    
    .xxx-wide {
        min-width: calc(var(--key-size) * 5);
    }
    
    /* Hide some keys on smaller screens */
    .key[data-key="PrintScreen"],
    .key[data-key="ScrollLock"],
    .key[data-key="Pause"] {
        display: none;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 5px;
    }
    
    .keyboard {
        padding: 5px;
        border-radius: 8px;
    }
    
    .mobile-notice {
        display: block;
    }
    
    /* Simplify the keyboard for mobile */
    .key[data-key^="F"] {
        display: none;
    }
    
    .spacer:not(:first-child) {
        display: none;
    }
    
    .key[data-key="ContextMenu"] {
        display: none;
    }
}

@media (max-width: 600px) {
    :root {
        --key-size: 25px;
        --key-font-size: 8px;
        --key-gap: 2px;
    }
    
    .key {
        min-width: calc(var(--key-size) * 0.9);
        height: calc(var(--key-size) * 1.2);
    }
    
    .wide {
        min-width: calc(var(--key-size) * 1.5);
    }
    
    .x-wide {
        min-width: calc(var(--key-size) * 2);
    }
    
    .xx-wide {
        min-width: calc(var(--key-size) * 2.5);
    }
    
    .xxx-wide {
        min-width: calc(var(--key-size) * 4);
    }
    
    /* Hide numpad on very small screens */
    .key[data-key^="Numpad"],
    .key[data-key="NumLock"],
    .key[data-key="NumpadDivide"],
    .key[data-key="NumpadMultiply"],
    .key[data-key="NumpadSubtract"],
    .key[data-key="NumpadAdd"],
    .key[data-key="NumpadEnter"] {
        display: none;
    }
}

@media (max-width: 400px) {
    :root {
        --key-size: 20px;
        --key-font-size: 7px;
    }
    
    .key {
        min-width: calc(var(--key-size) * 0.8);
        height: calc(var(--key-size) * 1.5);
    }
    
    /* Further simplify for tiny screens */
    .key[data-key="Insert"],
    .key[data-key="Delete"],
    .key[data-key="Home"],
    .key[data-key="End"],
    .key[data-key="PageUp"],
    .key[data-key="PageDown"] {
        display: none;
    }
}