:root {
    --bg-color: #f4f4f4;
    --piano-white: #fffff0;
    --piano-black: #222;
    --highlight: #ff6b6b;
    --border: #333;
}

body {
    font-family: sans-serif;
    background: var(--bg-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
}

h2 { margin-bottom: 10px; }

/* Container for the demo */
.widget-container {
    margin-bottom: 40px;
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    width: 1000px;
    display: flex;
    justify-content: center;
}

.superscript {
  vertical-align: super;
  font-size: 0.7em; 
}            

/* --- PIANO CSS --- */
.piano {
    position: relative;
    height: 120px;
    user-select: none;
    display: flex;
}

.key {
    border: 1px solid var(--border);
    border-radius: 0 0 4px 4px;
    cursor: pointer;
    position: relative;
    z-index: 1;
    transition: background 0.1s;
    
    /* MODIFIED: Text alignment and styling */
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding-bottom: 5px;
    font-size: 10px;
    font-weight: bold;
    color: #444; /* Dark text for white keys */
    box-sizing: border-box; 
}

.key.white {
    width: 40px;
    height: 100%;
    background: var(--piano-white);
}

.key.black {
    width: 24px;
    height: 65%;
    background: var(--piano-black);
    position: absolute; /* Overlays white keys */
    z-index: 2;
    margin-left: -12px; /* Center on the line between white keys */
    
    /* MODIFIED: Text color for black keys */
    color: #fff;
    font-weight: normal;
}

.key.active {
    background: var(--highlight) !important;
}

/* Specific override for active black keys to keep them dark but tinted */
.key.black.active {
    background: #d63030 !important;
}

/* --- STAFF CSS --- */
.staff-container svg {
    width: 100%;
    height: 250px;
}

.note-head {
    fill: black;
    stroke: none;
}

.note-accidental {
    font-family: serif;
    font-size: 24px;
    fill: black;
}

.staff-line {
    stroke: #666;
    stroke-width: 1;
}

.bar-line {
    stroke: #333;
    stroke-width: 2;
}

.clef-text {
    font-family: 'Times New Roman', serif;
    font-size: 50px;
    fill: #333;
}

/* Controls */
.controls {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}
button {
    padding: 10px 20px;
    cursor: pointer;
    font-size: 16px;
}