/* DAW MUSIC MAKER */
* { margin: 0; padding: 0; box-sizing: border-box; }

body { 
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; 
    background: #1a1a1a; 
    color: #e0e0e0; 
    overflow: hidden; 
    height: 100vh; 
}

.daw-container { 
    display: flex; 
    flex-direction: column; 
    height: 100vh; 
    width: 100vw; 
}

.top-bar { 
    display: flex; 
    align-items: center; 
    justify-content: space-between; 
    background: linear-gradient(135deg, #2d2d3a, #1f1f2e); 
    padding: 12px 20px; 
    border-bottom: 2px solid #667eea;
    flex-wrap: wrap;
    gap: 10px;
}

.logo h1 { 
    font-size: 1.4em; 
    color: #667eea; 
    margin: 0; 
}

.transport-controls { 
    display: flex; 
    gap: 10px; 
    align-items: center;
    flex-wrap: wrap;
}

.transport-btn { 
    width: 45px; 
    height: 45px; 
    border: none; 
    border-radius: 8px; 
    background: #3a3a4a; 
    color: white; 
    cursor: pointer; 
    font-size: 1.2em; 
    transition: all 0.2s ease; 
}

.transport-btn:hover { 
    background: #4a4a5a; 
    transform: translateY(-2px); 
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.transport-btn:active {
    transform: translateY(0);
}

.tempo-display { 
    display: flex; 
    gap: 8px; 
    align-items: center;
    background: #2a2a3a; 
    padding: 8px 15px; 
    border-radius: 8px; 
}

.tempo-display input { 
    width: 60px; 
    background: #1a1a2a; 
    border: 1px solid #444; 
    color: #fff; 
    padding: 6px; 
    border-radius: 5px; 
    text-align: center; 
    font-size: 1em;
}

.tempo-display input:focus {
    outline: 2px solid #667eea;
    border-color: #667eea;
}

.beat-display { 
    background: #667eea; 
    padding: 8px 18px; 
    border-radius: 8px; 
    font-weight: 700; 
    color: white; 
    min-width: 80px;
    text-align: center;
    transition: background 0.3s ease;
}

.top-right-controls {
    display: flex;
    gap: 10px;
    align-items: center;
}

.presets-dropdown {
    padding: 10px 15px;
    background: linear-gradient(135deg, #4a4a5a, #3a3a4a);
    border: 2px solid #667eea;
    border-radius: 8px;
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.95em;
    outline: none;
}

.presets-dropdown:hover {
    background: linear-gradient(135deg, #5a5a6a, #4a4a5a);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
    transform: translateY(-2px);
}

.presets-dropdown:focus {
    outline: 2px solid #667eea;
    outline-offset: 2px;
}

.presets-dropdown option {
    background: #2d2d3a;
    color: white;
}

.btn-export { 
    padding: 10px 25px; 
    background: linear-gradient(135deg, #48bb78, #38a169); 
    border: none; 
    border-radius: 8px; 
    color: white; 
    font-weight: 600; 
    cursor: pointer; 
    transition: all 0.2s ease;
    font-size: 1em;
}

.btn-export:hover {
    background: linear-gradient(135deg, #5cd68d, #48bb78);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(72, 187, 120, 0.4);
}

.btn-export:active {
    transform: translateY(0);
}

.btn-icon { 
    width: 40px; 
    height: 40px; 
    border: none; 
    border-radius: 50%; 
    background: #3a3a4a; 
    color: white; 
    cursor: pointer; 
    transition: all 0.2s ease;
    font-size: 1.2em;
}

.btn-icon:hover {
    background: #4a4a5a;
    transform: scale(1.1);
}

.main-layout { 
    display: grid; 
    grid-template-columns: minmax(250px, 280px) 1fr minmax(200px, 220px); 
    flex: 1; 
    overflow: hidden; 
}

/* Responsive layout for tablets */
@media (max-width: 1024px) {
    .main-layout {
        grid-template-columns: 220px 1fr 180px;
    }
    
    .logo h1 {
        font-size: 1.2em;
    }
}

/* Responsive layout for mobile */
@media (max-width: 768px) {
    .top-bar {
        padding: 8px 10px;
    }
    
    .main-layout {
        grid-template-columns: 1fr;
        grid-template-rows: auto 1fr auto;
    }
    
    .left-panel, .right-panel {
        border: none;
        border-bottom: 2px solid #333;
    }
    
    .transport-btn {
        width: 40px;
        height: 40px;
    }
    
    .piano {
        transform: scale(0.8);
    }
}

.left-panel, .right-panel { 
    background: #252530; 
    display: flex; 
    flex-direction: column;
    overflow: hidden; /* Prevent panel overflow */
    max-height: calc(100vh - 80px); /* Limit height to viewport minus header */
}

.left-panel {
    border-right: 2px solid #333;
}

.right-panel {
    border-left: 2px solid #333;
}

.panel-header { 
    display: flex; 
    justify-content: space-between; 
    align-items: center;
    padding: 15px; 
    background: #2d2d3a; 
    border-bottom: 2px solid #667eea;
    flex-shrink: 0; /* Prevent header from shrinking */
}

.panel-header h2 { 
    font-size: 1.1em; 
    color: #667eea; 
    margin: 0; 
}

.btn-add { 
    width: 32px; 
    height: 32px; 
    border: none; 
    border-radius: 50%; 
    background: #667eea; 
    color: white; 
    font-size: 1.5em; 
    cursor: pointer; 
    transition: all 0.2s ease;
    line-height: 1;
}

.btn-add:hover {
    background: #7688f5;
    transform: rotate(90deg) scale(1.1);
}

.channels-list { 
    flex: 1; 
    overflow-y: auto; 
    overflow-x: hidden; 
    padding: 10px;
    padding-bottom: 30px; /* Extra space at bottom for visibility */
    /* Ensure scrolling works properly */
    min-height: 0; /* Critical for flex scrolling */
    max-height: 100%;
}

/* Custom scrollbar for channels list */
.channels-list::-webkit-scrollbar {
    width: 8px;
}

.channels-list::-webkit-scrollbar-track {
    background: #1a1a2a;
    border-radius: 4px;
}

.channels-list::-webkit-scrollbar-thumb {
    background: #667eea;
    border-radius: 4px;
}

.channels-list::-webkit-scrollbar-thumb:hover {
    background: #7a8ef5;
}

.channel-item { 
    background: #2a2a3a; 
    border-radius: 8px; 
    padding: 12px; 
    margin-bottom: 10px; 
    cursor: pointer; 
    border: 2px solid transparent; 
    transition: all 0.2s ease;
    position: relative;
}

.channel-item:hover {
    background: #323244;
    border-color: #4a4a5a;
}

.channel-item.selected { 
    background: #3a3a55; 
    border-color: #667eea; 
    box-shadow: 0 0 15px rgba(102, 126, 234, 0.3);
}

.channel-item.muted {
    opacity: 0.6;
}

.channel-item.muted::after {
    content: '🔇';
    position: absolute;
    top: 10px;
    right: 35px;
    font-size: 0.9em;
}

.channel-header { 
    display: flex; 
    justify-content: space-between; 
    align-items: center;
    margin-bottom: 10px; 
}

.channel-name-display {
    font-weight: 600;
    color: #fff;
}

.channel-btn {
    background: #e53e3e;
    border: none;
    border-radius: 4px;
    color: white;
    cursor: pointer;
    padding: 4px 8px;
    transition: all 0.2s ease;
}

.channel-btn:hover {
    background: #f55;
    transform: scale(1.1);
}

.channel-settings { 
    display: grid; 
    grid-template-columns: 1fr 1fr; 
    gap: 8px; 
    margin-top: 10px; 
}

.setting-item { 
    display: flex; 
    flex-direction: column; 
    gap: 4px; 
}

.setting-item label { 
    font-size: 0.75em; 
    color: #888; 
}

.setting-item select, .setting-item input[type="range"] { 
    background: #1a1a2a; 
    border: 1px solid #444; 
    color: #fff; 
    padding: 5px; 
    border-radius: 4px; 
    cursor: pointer; 
}

.setting-item select:focus {
    outline: 2px solid #667eea;
    border-color: #667eea;
}

.center-panel { 
    background: #1e1e2e; 
    display: flex; 
    flex-direction: column; 
    overflow: hidden; 
}

.piano-roll-controls {
    display: flex;
    gap: 10px;
    align-items: center;
}

.btn-toggle-piano {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9em;
    font-weight: bold;
    transition: all 0.3s ease;
}

.btn-toggle-piano:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.btn-toggle-piano:active {
    transform: translateY(0);
}

.piano-roll-controls label {
    font-size: 0.9em;
    color: #ccc;
}

.piano-roll-controls select {
    background: #1a1a2a;
    border: 1px solid #444;
    color: #fff;
    padding: 5px 10px;
    border-radius: 4px;
    cursor: pointer;
}

.piano-roll-controls select:focus {
    outline: 2px solid #667eea;
    border-color: #667eea;
}

.pattern-sequencer { 
    flex: 1; 
    overflow: auto; 
    padding: 15px; 
}

.sequencer-info { 
    margin-bottom: 15px;
    padding: 10px;
    background: rgba(102, 126, 234, 0.1);
    border-radius: 8px;
    border-left: 3px solid #667eea;
}

.sequencer-grid { 
    display: grid; 
    gap: 2px; 
}

.sequencer-row { 
    display: grid; 
    grid-template-columns: 80px repeat(16, 35px); 
    gap: 2px; 
    align-items: center; 
}

.sequencer-label { 
    font-size: 0.8em; 
    color: #888; 
    padding: 5px;
    font-weight: 500;
}

.sequencer-step { 
    width: 35px; 
    height: 35px; 
    background: #2a2a3a; 
    border: 2px solid #3a3a4a; 
    border-radius: 4px; 
    cursor: pointer; 
    transition: all 0.15s ease; 
}

.sequencer-step:hover { 
    background: #3a3a4a; 
    border-color: #667eea; 
    transform: scale(1.05);
}

.sequencer-step.active { 
    background: linear-gradient(135deg, #667eea, #764ba2); 
    border-color: #667eea; 
    box-shadow: 0 0 10px rgba(102, 126, 234, 0.5);
}

.sequencer-step.beat { 
    border-color: #555; 
}

.piano-keyboard { 
    background: linear-gradient(135deg, #2d2d3a, #252530);
    padding: 20px 15px; 
    border-top: 2px solid #667eea;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
}

.piano-keyboard.collapsed {
    display: none;
}

.keyboard-label {
    text-align: center;
    margin-bottom: 15px;
    color: #ccc;
    font-size: 1em;
    font-weight: 600;
    line-height: 1.6;
}

.piano { 
    display: flex; 
    justify-content: center; 
    max-width: 700px; 
    margin: 0 auto; 
    position: relative; 
    user-select: none;
}

.white-key { 
    flex: 1; 
    min-width: 45px; 
    height: 140px; 
    background: linear-gradient(to bottom, #ffffff, #e8e8e8); 
    border: 2px solid #333; 
    border-radius: 0 0 8px 8px; 
    cursor: pointer; 
    display: flex; 
    align-items: flex-end; 
    justify-content: center; 
    padding-bottom: 8px; 
    color: #333; 
    font-weight: 700;
    font-size: 1.1em;
    transition: all 0.1s ease;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.white-key:hover {
    background: linear-gradient(to bottom, #f8f8f8, #d8d8d8);
    transform: translateY(2px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.white-key:focus {
    outline: 3px solid #667eea;
    z-index: 5;
}

.white-key.active { 
    background: linear-gradient(to bottom, #667eea, #5568d3); 
    color: white; 
    transform: translateY(4px);
}

.black-key { 
    position: absolute; 
    width: 32px; 
    height: 90px; 
    background: linear-gradient(to bottom, #222, #000); 
    border: 2px solid #000; 
    border-radius: 0 0 6px 6px; 
    cursor: pointer; 
    z-index: 10; 
    transition: all 0.1s ease;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.5);
}

.black-key:hover {
    background: linear-gradient(to bottom, #333, #111);
    transform: translateY(2px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.black-key:focus {
    outline: 3px solid #667eea;
    z-index: 15;
}

.black-key.active { 
    background: linear-gradient(to bottom, #764ba2, #6a3f8f); 
    transform: translateY(4px);
}

.black-key:nth-of-type(2) { left: calc((100% / 7 * 0.7) - 15px); }
.black-key:nth-of-type(4) { left: calc((100% / 7 * 1.7) - 15px); }
.black-key:nth-of-type(7) { left: calc((100% / 7 * 3.7) - 15px); }
.black-key:nth-of-type(9) { left: calc((100% / 7 * 4.7) - 15px); }
.black-key:nth-of-type(11) { left: calc((100% / 7 * 5.7) - 15px); }

.mixer-channels { 
    padding: 10px; 
    padding-bottom: 30px; /* Extra space at bottom for visibility */
    overflow-y: auto; 
    overflow-x: hidden; 
    flex: 1;
    /* Ensure scrolling works properly */
    min-height: 0; /* Critical for flex scrolling */
    max-height: 100%;
}

/* Custom scrollbar for mixer */
.mixer-channels::-webkit-scrollbar {
    width: 8px;
}

.mixer-channels::-webkit-scrollbar-track {
    background: #1a1a2a;
    border-radius: 4px;
}

.mixer-channels::-webkit-scrollbar-thumb {
    background: #667eea;
    border-radius: 4px;
}

.mixer-channels::-webkit-scrollbar-thumb:hover {
    background: #7a8ef5;
}

.mixer-channel { 
    background: #2a2a3a; 
    border-radius: 8px; 
    padding: 12px; 
    margin-bottom: 10px; 
    text-align: center; 
}

.mixer-channel .channel-name {
    font-weight: 600;
    margin-bottom: 10px;
    color: #ccc;
}

.volume-slider {
    width: 100%;
    cursor: pointer;
    accent-color: #667eea;
}

.volume-label {
    margin-top: 8px;
    font-size: 0.9em;
    color: #888;
}

.mixer-controls {
    display: flex;
    justify-content: center;
    gap: 5px;
    margin-top: 10px;
}

.mixer-btn {
    background: #3a3a4a;
    border: none;
    border-radius: 4px;
    color: white;
    cursor: pointer;
    padding: 6px 12px;
    font-weight: 600;
    transition: all 0.2s ease;
}

.mixer-btn:hover {
    background: #4a4a5a;
}

.mixer-btn.active {
    background: #e53e3e;
}

.master-channel {
    background: #3a3a55;
    border: 2px solid #667eea;
}

.guide-overlay { 
    position: fixed; 
    top: 0; 
    left: 0; 
    width: 100vw; 
    height: 100vh; 
    background: rgba(0, 0, 0, 0.9); 
    z-index: 1000; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
}

.guide-overlay.hidden { 
    display: none; 
}

.guide-content { 
    background: #2d2d3a; 
    border-radius: 15px; 
    padding: 40px; 
    max-width: 700px; 
    max-height: 80vh; 
    overflow-y: auto; 
    position: relative; 
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.close-guide { 
    position: absolute; 
    top: 15px; 
    right: 15px; 
    width: 35px; 
    height: 35px; 
    border: none; 
    border-radius: 50%; 
    background: #667eea; 
    color: white; 
    cursor: pointer; 
    font-size: 1.2em;
    transition: all 0.2s ease;
}

.close-guide:hover {
    background: #7688f5;
    transform: rotate(90deg);
}

.guide-content h2 { 
    color: #667eea; 
    margin-bottom: 25px; 
}

.guide-section { 
    margin-bottom: 20px; 
}

.guide-section h3 { 
    color: #fff; 
    margin-bottom: 10px; 
}

.guide-section p, .guide-section ul { 
    color: #ccc; 
    line-height: 1.6; 
}

.guide-section ul {
    list-style-position: inside;
    padding-left: 10px;
}

.guide-section li {
    margin-bottom: 5px;
}

.hidden { 
    display: none !important; 
}

/* Instrument Selection Dialog */
.instrument-dialog {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2500;
}

.instrument-dialog-content {
    background: linear-gradient(135deg, #2a2a3e 0%, #1a1a2e 100%);
    padding: 30px;
    padding-bottom: 40px; /* Extra space at bottom for visibility */
    border-radius: 15px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    max-width: 700px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
}

.instrument-dialog-content h3 {
    color: #fff;
    font-size: 1.5em;
    margin-bottom: 20px;
    text-align: center;
}

.instrument-category {
    margin-bottom: 20px;
}

.instrument-category h4 {
    color: #667eea;
    font-size: 0.9em;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.instrument-select {
    width: 100%;
    background: #1a1a2e;
    color: #fff;
    border: 2px solid #667eea;
    border-radius: 8px;
    padding: 8px;
    font-size: 0.95em;
    cursor: pointer;
    outline: none;
}

.instrument-select option {
    padding: 8px;
    cursor: pointer;
}

.instrument-select option:hover {
    background: #667eea;
}

.instrument-select:focus {
    border-color: #764ba2;
    box-shadow: 0 0 10px rgba(102, 126, 234, 0.5);
}

.instrument-dialog-buttons {
    display: flex;
    gap: 10px;
    margin-top: 25px;
    justify-content: center;
}

.dialog-btn {
    padding: 12px 30px;
    border: none;
    border-radius: 8px;
    font-size: 1em;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: bold;
}

.dialog-btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.dialog-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.dialog-btn-secondary {
    background: #444;
    color: white;
}

.dialog-btn-secondary:hover {
    background: #555;
}

/* Scrollbar styling */
::-webkit-scrollbar { 
    width: 10px; 
    height: 10px; 
}

::-webkit-scrollbar-track { 
    background: #1a1a1a; 
}

::-webkit-scrollbar-thumb { 
    background: #667eea; 
    border-radius: 5px; 
}

::-webkit-scrollbar-thumb:hover { 
    background: #7688f5; 
}

::-webkit-scrollbar-corner { 
    background: #1a1a1a; 
}

/* Animations */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translate(-50%, -20px);
    }
    to {
        opacity: 1;
        transform: translate(-50%, 0);
    }
}

@keyframes slideUp {
    from {
        opacity: 1;
        transform: translate(-50%, 0);
    }
    to {
        opacity: 0;
        transform: translate(-50%, -20px);
    }
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Focus visible for better accessibility */
*:focus-visible {
    outline: 2px solid #667eea;
    outline-offset: 2px;
}

/* High contrast mode improvements */
@media (prefers-contrast: high) {
    .channel-item.selected {
        border-width: 3px;
    }
    
    .sequencer-step.active {
        border-width: 3px;
    }
}