* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: #0a0a0a;
    color: #ffffff;
    font-family: 'Courier New', monospace;
    overflow: hidden;
    cursor: default;
}

.container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 1000;
    pointer-events: none;
}

.controls {
    position: absolute;
    top: 30px;
    left: 30px;
    display: flex;
    gap: 15px;
    pointer-events: auto;
}

.btn {
    background: transparent;
    border: 1px solid #333;
    color: #ffffff;
    padding: 8px 16px;
    font-family: 'Courier New', monospace;
    font-size: 11px;
    letter-spacing: 1px;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    display: inline-block;
}

.btn:hover {
    border-color: #666;
    background: #111;
}

.btn:active {
    background: #222;
}

.btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.btn:disabled:hover {
    border-color: #333;
    background: transparent;
}

.info {
    position: absolute;
    bottom: 30px;
    right: 30px;
    pointer-events: none;
}

.info p {
    font-size: 10px;
    letter-spacing: 2px;
    text-transform: uppercase;
    opacity: 0.4;
}

.freq-label {
    font-size: 8px;
    letter-spacing: 1px;
    text-transform: uppercase;
    opacity: 0.6;
    pointer-events: none;
    position: absolute;
    color: #ffffff;
}

.freq-labels {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

/* Canvas styling */
main {
    position: fixed;
    top: 0;
    left: 0;
    z-index: -1;
}

/* Hide default file input */
input[type="file"] {
    display: none;
}

/* Responsive */
@media (max-width: 768px) {
    .controls {
        top: 20px;
        left: 20px;
        gap: 10px;
    }
    
    .btn {
        padding: 6px 12px;
        font-size: 10px;
    }
    
    .info {
        bottom: 20px;
        right: 20px;
    }
    
    .info p {
        font-size: 9px;
    }
}