/* Reset and base styles - Updated for GitHub Pages deployment */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Press Start 2P', cursive, monospace;
    font-size: 10px;
    background: #c0c0c0;
    overflow: hidden;
    height: 100vh;
}

/* Desktop Environment */
.desktop {
    width: 100vw;
    height: 100vh;
    background: 
        /* Computer icons pattern */
        url("data:image/svg+xml,%3Csvg width='200' height='200' viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23ffffff' fill-opacity='0.12'%3E%3Ctext x='20' y='40' font-size='28' font-family='monospace'%3E💻%3C/text%3E%3Ctext x='140' y='70' font-size='26' font-family='monospace'%3E🖥️%3C/text%3E%3Ctext x='70' y='100' font-size='24' font-family='monospace'%3E💾%3C/text%3E%3Ctext x='120' y='160' font-size='26' font-family='monospace'%3E⌨️%3C/text%3E%3Ctext x='30' y='140' font-size='25' font-family='monospace'%3E🖱️%3C/text%3E%3Ctext x='160' y='120' font-size='24' font-family='monospace'%3E📁%3C/text%3E%3Ctext x='50' y='180' font-size='25' font-family='monospace'%3E🔧%3C/text%3E%3C/g%3E%3C/svg%3E"),
        /* Blue gradient background */
        linear-gradient(135deg, #4A90E2 0%, #2E86AB 30%, #1E5A8A 70%, #0F4C75 100%);
    background-size: 200px 200px, 100% 100%;
    position: relative;
    animation: subtleShift 60s ease-in-out infinite;
}

@keyframes subtleShift {
    0%, 100% { background-position: 0px 0px, 0% 0%; }
    50% { background-position: 60px 60px, 0% 0%; }
}


/* Classic Window Styles */
.window {
    position: absolute;
    background: #c0c0c0;
    border: 2px outset #c0c0c0;
    box-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    min-width: 300px;
}

.title-bar {
    height: 20px;
    background: linear-gradient(to bottom, #ffffff, #c0c0c0);
    border-bottom: 1px solid #808080;
    display: flex;
    align-items: center;
    padding: 0 4px;
    position: relative;
}

.title-bar-title {
    font-size: 9px;
    font-weight: normal;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
}

.title-bar-controls {
    display: flex;
    gap: 4px;
    align-items: center;
}

.title-bar-controls.left {
    gap: 6px;
}


.window-button {
    width: 14px;
    height: 14px;
    border: 1px outset #c0c0c0;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 8px;
    background: linear-gradient(to bottom, #ffffff, #e0e0e0);
    color: #333333;
    font-weight: bold;
}

.window-button:hover {
    background: linear-gradient(to bottom, #f0f0f0, #d0d0d0);
}

.window-button:active {
    border: 1px inset #c0c0c0;
    background: linear-gradient(to bottom, #d0d0d0, #c0c0c0);
}

.window-button.zoom::after {
    content: '⇅';
    font-size: 6px;
}

/* macOS Style Window Controls */
.mac-button {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    cursor: pointer;
    border: 1px solid rgba(0, 0, 0, 0.2);
    position: relative;
    transition: all 0.2s ease;
}

.mac-button:hover {
    transform: scale(1.1);
}

.mac-button:active {
    transform: scale(0.95);
}

.close-mac {
    background: linear-gradient(to bottom, #ff5f57, #ff3b30);
    box-shadow: 0 1px 2px rgba(255, 59, 48, 0.3);
}

.minimize-mac {
    background: linear-gradient(to bottom, #ffbd2e, #ff9500);
    box-shadow: 0 1px 2px rgba(255, 149, 0, 0.3);
}

.maximize-mac {
    background: linear-gradient(to bottom, #28cd41, #30d158);
    box-shadow: 0 1px 2px rgba(48, 209, 88, 0.3);
}

.close-mac:hover::after {
    content: '×';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 8px;
    color: rgba(0, 0, 0, 0.6);
    font-weight: bold;
}

.minimize-mac:hover::after {
    content: '−';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 8px;
    color: rgba(0, 0, 0, 0.6);
    font-weight: bold;
}

.maximize-mac:hover::after {
    content: '+';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 8px;
    color: rgba(0, 0, 0, 0.6);
    font-weight: bold;
}

.window-content {
    padding: 12px;
    background: #c0c0c0;
}


/* Piano Window */
.piano-window {
    width: 900px;
    height: 480px; /* Reduced from 500px to minimize white space */
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    max-width: 95vw;
    max-height: 90vh;
    transition: all 0.3s ease;
}

.piano-window.maximized {
    width: 95vw;
    height: 90vh;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}

.piano-content {
    padding: 6px 6px 2px 6px; /* Reduced bottom padding */
}

.control-panel {
    display: flex;
    gap: 16px;
    margin-bottom: 8px; /* Reduced from 16px to bring keyboard closer */
    padding: 14px;
    background: #a8a8a8;
    border: 1px inset #c0c0c0;
    align-items: flex-start;
    flex-wrap: wrap;
    justify-content: space-between;
}

.control-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

/* Typography System - Section Headers */
.control-group label {
    font-size: 9px;
    margin-bottom: 6px;
    font-weight: bold;
    color: #000000;
    font-family: 'Press Start 2P', cursive, monospace;
}

/* Typography System - Sub Labels */
.sub-label {
    font-size: 8px !important;
    font-weight: normal !important;
    margin-bottom: 3px !important;
    font-family: 'Press Start 2P', cursive, monospace;
}

/* Playback Controls */
.playback-group {
    align-items: flex-start;
    min-width: 120px;
}

.playback-controls {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.record-button, .play-button {
    background: linear-gradient(to bottom, #ffffff, #c0c0c0);
    border: 2px outset #c0c0c0;
    padding: 4px 8px;
    font-family: 'Press Start 2P', cursive, monospace;
    font-size: 8px;
    cursor: pointer;
    min-width: 80px;
    display: flex;
    align-items: center;
    gap: 4px;
}

.record-button:hover:not(:disabled), .play-button:hover:not(:disabled) {
    background: linear-gradient(to bottom, #e0e0e0, #a0a0a0);
}

.record-button:active:not(:disabled), .play-button:active:not(:disabled) {
    border: 2px inset #c0c0c0;
    background: linear-gradient(to bottom, #a0a0a0, #e0e0e0);
}

.record-button:disabled, .play-button:disabled {
    background: #999999;
    color: #666666;
    cursor: not-allowed;
    border: 2px inset #999999;
}

.record-button.recording {
    background: linear-gradient(to bottom, #ff6666, #cc3333);
    color: white;
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.record-icon, .play-icon {
    font-size: 8px;
}

/* Typography System - Status Text */
.recording-status {
    font-size: 7px;
    margin-top: 4px;
    color: #333333;
    min-height: 12px;
}

/* Audio Controls */
.audio-controls {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 5px;
    margin-bottom: 8px;
    width: 100%;
}

.volume-control-group {
    display: flex;
    align-items: center;
    gap: 5px;
}

.volume-display {
    font-size: 7px;
    color: #333333;
    min-width: 25px;
    text-align: right;
}

.sustain-control {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: 8px;
    margin-top: 0px;
    width: 100%;
}

.toggle-button {
    background: linear-gradient(to bottom, #ffffff, #c0c0c0);
    border: 1px outset #c0c0c0;
    padding: 2px 8px;
    font-family: 'Press Start 2P', cursive, monospace;
    font-size: 8px;
    cursor: pointer;
    min-width: 40px;
}

.toggle-button:active {
    border: 1px inset #c0c0c0;
    background: linear-gradient(to bottom, #a0a0a0, #e0e0e0);
}

.toggle-button.active {
    background: linear-gradient(to bottom, #66ff66, #33cc33);
    color: #000000;
}

/* Song Controls */
.song-group {
    align-items: center;
    min-width: 120px;
}

.song-controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
    width: 100%;
}

.song-button {
    background: linear-gradient(to bottom, #66ccff, #3399cc);
    border: 2px outset #66ccff;
    padding: 4px 8px;
    font-family: 'Press Start 2P', cursive, monospace;
    font-size: 8px;
    cursor: pointer;
    color: #000000;
    width: 95px;
    text-align: center;
}

.song-button:hover:not(:disabled) {
    background: linear-gradient(to bottom, #4db8ff, #2d8fcc);
}

.song-button:active:not(:disabled) {
    border: 2px inset #66ccff;
    background: linear-gradient(to bottom, #2d8fcc, #4db8ff);
}

.song-button:disabled {
    background: #999999;
    color: #666666;
    cursor: not-allowed;
    border: 2px inset #999999;
}

.song-button.playing {
    background: linear-gradient(to bottom, #ffcc66, #cc9933);
    color: #000000;
    animation: pulse 1.5s infinite;
}

.song-status {
    font-size: 7px;
    margin-top: 4px;
    color: #333333;
    min-height: 12px;
    text-align: center;
}

.teach-button {
    background: linear-gradient(to bottom, #66ff66, #33cc33);
    border: 2px outset #66ff66;
    padding: 4px 8px;
    font-family: 'Press Start 2P', cursive, monospace;
    font-size: 8px;
    cursor: pointer;
    color: #000000;
    width: 95px;
    text-align: center;
    margin-top: 1px;
}

.teach-button:hover:not(:disabled) {
    background: linear-gradient(to bottom, #4dff4d, #29a329);
}

.teach-button:active:not(:disabled) {
    border: 2px inset #66ff66;
    background: linear-gradient(to bottom, #29a329, #4dff4d);
}

.teach-button:disabled {
    background: #999999;
    color: #666666;
    cursor: not-allowed;
    border: 2px inset #999999;
}

.teach-button.teaching {
    background: linear-gradient(to bottom, #ffff66, #cccc33);
    color: #000000;
    animation: pulse 2s infinite;
}

/* Teaching mode indicators */
.key.next-key {
    box-shadow: 0 0 15px #00ff00, 0 0 25px #00ff00, 0 0 35px #00ff00;
    animation: glow 1.5s ease-in-out infinite alternate;
}

.key.correct {
    box-shadow: 0 0 10px #00ff00;
    animation: flash-green 0.3s;
}

.key.wrong {
    box-shadow: 0 0 10px #ff0000;
    animation: flash-red 0.5s;
}

@keyframes glow {
    from { box-shadow: 0 0 10px #00ff00, 0 0 20px #00ff00, 0 0 30px #00ff00; }
    to { box-shadow: 0 0 20px #00ff00, 0 0 30px #00ff00, 0 0 40px #00ff00; }
}

@keyframes flash-green {
    0% { background: #66ff66; }
    100% { background: initial; }
}

@keyframes flash-red {
    0% { background: #ff6666; }
    100% { background: initial; }
}

/* Falling light indicator */
.falling-light {
    position: absolute;
    width: 6px; /* Increased width for larger keys */
    height: 30px; /* Increased height for larger keys */
    background: linear-gradient(to bottom, #00ff00, rgba(0, 255, 0, 0.3));
    border-radius: 3px;
    top: -40px; /* Adjusted starting position */
    left: 50%;
    transform: translateX(-50%);
    animation: fall 2s ease-in;
    pointer-events: none;
    z-index: 10;
}

@keyframes fall {
    from {
        top: -40px;
        opacity: 1;
    }
    to {
        top: 150px; /* Increased for larger keys */
        opacity: 0;
    }
}

.slider {
    -webkit-appearance: none;
    width: 80px;
    height: 4px;
    background: #808080;
    border: 1px inset #c0c0c0;
    outline: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    background: #c0c0c0;
    border: 1px outset #c0c0c0;
    cursor: pointer;
}

.instrument-selector {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 3px;
    margin-top: 5px;
    margin-bottom: 8px;
    width: 100%;
}

.instrument-dropdown {
    background: linear-gradient(to bottom, #ffffff, #e6e6e6);
    border: 2px inset #c0c0c0;
    font-family: 'Press Start 2P', cursive, monospace;
    font-size: 7px;
    padding: 3px 6px;
    width: 110px;
    text-align: center;
    cursor: pointer;
    border-radius: 2px;
}

.instrument-dropdown:focus {
    outline: none;
    border: 2px inset #0066cc;
    background: linear-gradient(to bottom, #e6f3ff, #cce6ff);
}

.octave-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 110px; /* Match the width of instrument dropdown */
}

.control-button {
    background: linear-gradient(to bottom, #ffffff, #c0c0c0);
    border: 1px outset #c0c0c0;
    padding: 2px 6px;
    font-family: 'Press Start 2P', cursive, monospace;
    font-size: 8px;
    cursor: pointer;
    min-width: 20px;
}

.control-button:active {
    border: 1px inset #c0c0c0;
    background: linear-gradient(to bottom, #a0a0a0, #e0e0e0);
}

#octaveDisplay {
    font-size: 8px;
    min-width: 20px;
    text-align: center;
    font-family: 'Press Start 2P', cursive, monospace;
}

/* Piano Keyboard */
.piano-container {
    background: #000000;
    border: 2px inset #c0c0c0;
    padding: 8px; /* Increased padding for larger keyboard */
    margin-top: 45px; /* Center keyboard vertically along reference line */
    margin-bottom: 4px; /* Further reduced margin */
    overflow: hidden;
    display: flex;
    justify-content: center; /* Center the keyboard horizontally */
    width: fit-content; /* Size to fit keyboard exactly */
    margin-left: auto;
    margin-right: auto;
}

/* Tutorial Message Area */
.tutorial-message {
    background: #e6e6e6;
    border: 2px inset #c0c0c0;
    padding: 8px 12px;
    margin: 0 auto 4px auto; /* Reduced bottom margin from 12px to 4px */
    text-align: center;
    font-size: 8px;
    font-family: 'Press Start 2P', cursive, monospace;
    color: #000000;
    width: fit-content;
    min-height: 20px;
    border-radius: 3px;
    display: none; /* Hidden by default, shown during teaching */
}

.keyboard {
    height: 180px; /* Increased from 120px */
    width: 860px; /* Increased from 840px to give more room for last key */
    position: relative;
    margin: 0 auto; /* Center the keyboard */
}

/* Piano Keys */
.key {
    position: relative;
    cursor: pointer;
    user-select: none;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    font-size: 8px;
    font-weight: normal;
    transition: all 0.05s;
}

.key.white {
    width: 60px; /* Increased from 40px */
    height: 180px; /* Increased from 120px */
    background: linear-gradient(to bottom, #ffffff, #f0f0f0);
    border: 1px solid #000000;
    border-radius: 0 0 4px 4px; /* Slightly larger radius */
    z-index: 1;
    padding-bottom: 12px; /* Increased padding */
}

.key.white:hover {
    background: linear-gradient(to bottom, #f0f0f0, #e0e0e0);
}

.key.white:active,
.key.white.active {
    background: linear-gradient(to bottom, #d0d0d0, #c0c0c0);
    transform: translateY(1px);
}

.key.black {
    width: 38px; /* Increased from 25px */
    height: 110px; /* Increased from 75px */
    background: linear-gradient(to bottom, #404040, #000000);
    border: 1px solid #000000;
    border-radius: 0 0 3px 3px; /* Slightly larger radius */
    z-index: 2;
    color: white;
    padding-bottom: 12px; /* Increased padding */
}

.key.black:hover {
    background: linear-gradient(to bottom, #505050, #202020);
}

.key.black:active,
.key.black.active {
    background: linear-gradient(to bottom, #202020, #101010);
    transform: translateY(1px);
}

.key-label {
    font-size: 8px;
    opacity: 0.7;
}


/* Desktop Icons */
.desktop-icon {
    position: absolute;
    width: 60px;
    text-align: center;
    cursor: pointer;
    font-size: 8px;
}

.desktop-icon .icon {
    font-size: 32px;
    margin-bottom: 4px;
}

.desktop-icon .icon-label {
    background: rgba(192, 192, 192, 0.8);
    padding: 2px;
    border-radius: 2px;
}

.piano-icon {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.piano-icon.hidden {
    display: none;
}


/* Teaching Mode Overlay */
.teaching-mode .key.next-key {
    position: relative;
}

.teaching-mode .key.next-key::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 255, 0, 0.15); /* 15% transparent green only on next key */
    pointer-events: none;
    border-radius: inherit;
}

/* Confetti Animation */
.confetti-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1000;
    overflow: hidden;
}

.confetti {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 10px;
    height: 10px;
    background: #ff6b6b;
    animation: confetti-burst 3s ease-out forwards;
}

.confetti:nth-child(2n) { background: #4ecdc4; }
.confetti:nth-child(3n) { background: #45b7d1; }
.confetti:nth-child(4n) { background: #f9ca24; }
.confetti:nth-child(5n) { background: #f0932b; }
.confetti:nth-child(6n) { background: #eb4d4b; }
.confetti:nth-child(7n) { background: #6c5ce7; }
.confetti:nth-child(8n) { background: #a29bfe; }
.confetti:nth-child(9n) { background: #fd79a8; }
.confetti:nth-child(10n) { background: #00b894; }

.confetti:nth-child(odd) {
    border-radius: 50%;
}

.confetti:nth-child(even) {
    border-radius: 0;
}

@keyframes confetti-burst {
    0% {
        transform: translate(-50%, -50%) scale(0) rotate(0deg);
        opacity: 1;
    }
    100% {
        transform: translate(var(--dx), var(--dy)) scale(1) rotate(720deg);
        opacity: 0;
    }
}

/* Utility Classes */
.hidden {
    display: none !important;
}

/* Responsive Design */
@media (max-width: 900px) {
    .piano-window {
        width: 95vw;
        height: 80vh; /* Reduced from 85vh to minimize white space */
    }
    
    .keyboard {
        width: 720px; /* Increased from 700px to give more room for last key */
        height: 150px;
    }
    
    .key.white {
        width: 50px;
        height: 150px;
        padding-bottom: 10px;
    }
    
    .key.black {
        width: 30px;
        height: 90px;
        padding-bottom: 10px;
    }
    
    .key-label {
        font-size: 8px;
    }
    
    .control-panel {
        gap: 6px; /* Reduced gap to save space */
        padding: 8px;
        margin-bottom: 6px; /* Reduced margin */
    }
    
    .volume-control-group {
        gap: 3px;
    }
    
    .volume-display {
        font-size: 6px;
        min-width: 20px;
    }
    
    .song-button, .teach-button {
        width: 85px;
        font-size: 7px;
    }
    
    .tutorial-message {
        font-size: 7px;
        padding: 6px 10px;
    }
    
    .instrument-dropdown {
        width: 95px;
        font-size: 6px;
        padding: 2px 4px;
    }
    
    .octave-controls {
        width: 95px; /* Match the responsive width of instrument dropdown */
    }
}

@media (max-width: 750px) {
    .keyboard {
        width: 580px; /* Increased from 560px to give more room for last key */
        height: 120px;
    }
    
    .key.white {
        width: 40px;
        height: 120px;
        padding-bottom: 8px;
    }
    
    .key.black {
        width: 25px;
        height: 75px;
        padding-bottom: 8px;
    }
    
    .key-label {
        font-size: 7px;
    }
    
    .volume-control-group {
        gap: 2px;
    }
    
    .volume-display {
        font-size: 6px;
        min-width: 18px;
    }
    
    .tutorial-message {
        font-size: 7px;
        padding: 4px 8px;
    }
    
    .instrument-dropdown {
        width: 85px;
        font-size: 6px;
        padding: 2px 4px;
    }
    
    .octave-controls {
        width: 85px; /* Match the responsive width of instrument dropdown */
    }
}

@media (max-width: 500px) {
    body {
        font-size: 8px;
    }
}