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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #1e1e1e 0%, #2a2a2a 100%);
    color: #ffffff;
    height: 100vh;
    overflow: hidden;
}

.app-container {
    height: 100vh;
    display: flex;
    flex-direction: column;
}

.header {
    background: #333;
    padding: 15px 20px;
    border-bottom: 2px solid #444;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

.app-title {
    font-size: 24px;
    font-weight: bold;
    color: #00ff88;
}

.global-controls {
    display: flex;
    gap: 15px;
    align-items: center;
}

.master-volume {
    display: flex;
    align-items: center;
    gap: 8px;
    background: #444;
    padding: 8px 12px;
    border-radius: 6px;
    border: 1px solid #555;
}

.master-volume label {
    font-size: 12px;
    color: #ccc;
    white-space: nowrap;
}

input[type="range"] {
    touch-action: none;
}

.volume-slider {
    width: 80px;
    height: 4px;
    background: #555;
    border-radius: 2px;
    outline: none;
    cursor: pointer;
    transition: background 0.2s ease;
}

.volume-slider::-webkit-slider-runnable-track,
.volume-slider::-moz-range-track {
    height: 4px;
    background: #555;
    border-radius: 2px;
}

.volume-slider::-webkit-slider-thumb {
    appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: #00ff88;
    cursor: pointer;
    transition: all 0.2s ease;
}

.volume-slider::-webkit-slider-thumb:hover {
    background: #00cc6a;
    transform: scale(1.1);
}

.volume-slider::-moz-range-thumb {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: #00ff88;
    cursor: pointer;
    border: none;
    transition: all 0.2s ease;
}

.volume-slider::-moz-range-thumb:hover {
    background: #00cc6a;
    transform: scale(1.1);
}

.volume-value {
    font-size: 11px;
    color: #00ff88;
    min-width: 30px;
    text-align: center;
}

.btn {
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s ease;
    background: #555;
    color: white;
    touch-action: manipulation;
}

.btn:hover {
    background: #666;
    transform: translateY(-1px);
}

.btn.primary {
    background: #007bff;
}

.btn.primary:hover {
    background: #0056b3;
}

.btn.danger {
    background: #dc3545;
}

.btn.danger:hover {
    background: #c82333;
}

.tab-container {
    background: #2a2a2a;
    border-bottom: 1px solid #444;
    display: flex;
    align-items: center;
    padding: 0 20px;
    overflow-x: auto;
}

.tab {
    padding: 12px 20px;
    cursor: pointer;
    border-bottom: 3px solid transparent;
    white-space: nowrap;
    user-select: none;
    position: relative;
    display: flex;
    align-items: center;
    gap: 8px;
}

.tab.active {
    border-bottom-color: #00ff88;
    background: rgba(0, 255, 136, 0.1);
}

.tab:hover:not(.active) {
    background: rgba(255, 255, 255, 0.05);
}

.tab-close {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: #666;
    border: none;
    color: white;
    cursor: pointer;
    font-size: 10px;
    display: none;
}

.tab:hover .tab-close {
    display: block;
}

.tab-close:hover {
    background: #dc3545;
}

.add-tab {
    padding: 12px;
    cursor: pointer;
    color: #888;
    border-left: 1px solid #444;
    margin-left: 10px;
}

.add-tab:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.05);
}

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.panel-content {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
}

.sound-grid {
    display: grid;
    /*
     * Increase the minimum column width so that card elements such as the
     * volume slider fit comfortably without bleeding into the padding.
     */
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 15px;
    max-width: 100%;
}

.sound-card {
    background: linear-gradient(145deg, #3a3a3a 0%, #2e2e2e 100%);
    border-radius: 12px;
    padding: 15px;
    border: 2px solid #444;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.sound-card.temporary {
    background: linear-gradient(145deg, #4a3a2a 0%, #3e2e1e 100%);
    border: 2px dashed #ff9500;
}

.sound-card:hover {
    border-color: #666;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.sound-card.playing {
    border-color: #00ff88;
    box-shadow: 0 0 20px rgba(0, 255, 136, 0.3);
}

.sound-card.paused {
    border-color: #ffc107;
    box-shadow: 0 0 20px rgba(255, 193, 7, 0.3);
}

.sound-card.looping {
    border-style: dashed;
}

.sound-card.temporary .sound-header {
    margin-top: 18px;
}

.temp-indicator {
    position: absolute;
    top: 2px;
    left: 2px;
    right: 2px;
    background: rgba(255, 149, 0, 0.9);
    color: #000;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 10px;
    font-weight: bold;
    text-align: center;
    z-index: 2;
}

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

.sound-title {
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    truncate: true;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.sound-title-input {
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    background: #555;
    border: 1px solid #777;
    border-radius: 4px;
    width: 100%;
    padding: 2px 4px;
}

.sound-status {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #666;
}

.sound-status.playing {
    background: #00ff88;
    animation: pulse 2s infinite;
}

.sound-status.paused {
    background: #ffc107;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.sound-controls {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-bottom: 10px;
}

.sound-btn {
    padding: 8px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 12px;
    transition: all 0.2s ease;
    background: #555;
    color: white;
}

.sound-btn:hover {
    background: #666;
}

.sound-btn.play {
    background: #28a745;
}

.sound-btn.play.active {
    box-shadow: 0 0 6px #00ff88;
}

.sound-btn.play:hover {
    background: #218838;
}

.sound-btn.pause {
    background: #ffc107;
    color: #000;
}

.sound-btn.pause:hover {
    background: #e0a800;
}

.sound-btn.stop {
    background: #dc3545;
}

.sound-btn.stop:hover {
    background: #c82333;
}

.loop-toggle {
    grid-column: span 2;
    background: #6c757d;
}

.loop-toggle.active {
    background: #007bff;
}

.time-controls {
    display: flex;
    gap: 4px;
    margin-top: 8px;
}

.time-btn {
    flex: 1;
    padding: 4px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 10px;
    background: #444;
    color: white;
    transition: background 0.2s ease;
}

.time-btn:hover {
    background: #555;
}

.progress-container {
    margin-top: 8px;
    background: #444;
    border-radius: 10px;
    height: 4px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, #00ff88, #00cc6a);
    width: 0%;
    transition: width 0.1s ease;
}

.sound-volume {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 8px;
    padding: 4px 0;
}

.sound-volume label {
    font-size: 10px;
    color: #ccc;
    min-width: 20px;
}

.sound-volume-slider {
    flex: 1;
    height: 3px;
    background: #555;
    border-radius: 2px;
    outline: none;
    cursor: pointer;
}

.sound-volume-slider::-webkit-slider-runnable-track,
.sound-volume-slider::-moz-range-track {
    height: 3px;
    background: #555;
    border-radius: 2px;
}

.sound-volume-slider::-webkit-slider-thumb {
    appearance: none;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #007bff;
    cursor: pointer;
    transition: all 0.2s ease;
}

.sound-volume-slider::-webkit-slider-thumb:hover {
    background: #0056b3;
    transform: scale(1.1);
}

.sound-volume-slider::-moz-range-thumb {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #007bff;
    cursor: pointer;
    border: none;
    transition: all 0.2s ease;
}

.sound-volume-slider::-moz-range-thumb:hover {
    background: #0056b3;
    transform: scale(1.1);
}

.sound-volume-value {
    font-size: 9px;
    color: #007bff;
    min-width: 25px;
    text-align: center;
}



.empty-slot {
    background: linear-gradient(145deg, #2a2a2a 0%, #1e1e1e 100%);
    border: 2px dashed #555;
    border-radius: 12px;
    padding: 30px 15px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

.drag-over {
    border-color: #00ff88 !important;
    background: rgba(0, 255, 136, 0.1) !important;
}

.empty-slot:hover {
    border-color: #777;
    background: linear-gradient(145deg, #333 0%, #2a2a2a 100%);
}


.empty-text {
    color: #888;
    font-size: 14px;
}

.empty-text strong {
    color: #fff;
    display: block;
    margin-bottom: 5px;
}

.url-btn {
    margin-top: 10px;
    padding: 6px 12px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 12px;
    background: #555;
    color: #fff;
    transition: background 0.2s ease;
    position: relative;
    z-index: 1;
}

.url-btn:hover {
    background: #666;
}

.button-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
}

.remove-sound {
    position: absolute;
    top: 5px;
    right: 5px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: rgba(220, 53, 69, 0.8);
    border: none;
    color: white;
    cursor: pointer;
    font-size: 12px;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.rename-sound {
    position: absolute;
    top: 5px;
    right: 30px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: rgba(0, 123, 255, 0.8);
    border: none;
    color: white;
    cursor: pointer;
    font-size: 12px;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.sound-card:hover .remove-sound {
    opacity: 1;
}

.sound-card:hover .rename-sound {
    opacity: 1;
}

.rename-sound:hover {
    background: #007bff;
}

.remove-sound:hover {
    background: #dc3545;
}

.hidden {
    display: none !important;
    visibility: hidden;
    opacity: 0;
}

.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: #333;
    padding: 20px;
    border-radius: 12px;
    max-width: 400px;
    width: 90%;
}

.modal-content input {
    width: 100%;
    padding: 10px;
    border: 1px solid #555;
    border-radius: 6px;
    background: #444;
    color: white;
    margin: 10px 0;
}

.modal-content.library {
    max-width: 500px;
}

.library-list {
    max-height: 300px;
    overflow-y: auto;
    position: relative;
    margin-bottom: 10px;
}

.library-item {
    background: #444;
    padding: 6px 10px;
    border-radius: 6px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.library-file-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    margin-right: 10px;
}

.library-buttons {
    display: flex;
    gap: 6px;
}

.btn.small {
    padding: 4px 8px;
    font-size: 12px;
}

.library-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: center;
}

#loadingOverlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2500;
}

#loadingOverlay.hidden {
    display: none;
}

.loader {
    text-align: center;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top-color: #00ff88;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 10px;
}

.loading-message {
    color: #fff;
    font-size: 16px;
}

#toastContainer {
    position: fixed;
    bottom: 20px;
    right: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 2000;
}

.toast {
    background: rgba(0, 0, 0, 0.8);
    color: #fff;
    padding: 10px 16px;
    border-radius: 6px;
    animation: fadein 0.3s, fadeout 0.3s 2.7s;
}

@keyframes fadein {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeout {
    from { opacity: 1; }
    to { opacity: 0; }
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Responsive adjustments for small screens */
@media (max-width: 600px) {
    body,
    .app-container {
        height: auto;
        min-height: 100vh;
        overflow-y: auto;
    }
    .header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .global-controls {
        width: 100%;
        flex-wrap: wrap;
        gap: 10px;
    }

    .master-volume {
        width: 100%;
        justify-content: space-between;
    }

    .volume-slider {
        flex: 1;
        width: auto;
    }

    .btn {
        padding: 12px;
        flex: 1 1 auto;
    }

    .sound-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    }

    .sound-btn,
    .time-btn {
        font-size: 14px;
        padding: 10px;
    }
}