* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    overflow: hidden;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    transition: background 0.5s, color 0.5s;
    height: 100vh;
}

body.dark-mode {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    color: #e2e8f0;
}

#canvas {
    display: block;
    cursor: crosshair;
}

.toolbar {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(255, 255, 255, 0.9);
    padding: 12px 16px;
    border-radius: 16px;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 
                0 8px 10px -6px rgba(0, 0, 0, 0.05);
    display: flex;
    gap: 16px;
    align-items: center;
    z-index: 1000;
    flex-wrap: wrap;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(203, 213, 225, 0.3);
}

.dark-mode .toolbar {
    background: rgba(30, 41, 59, 0.9);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3), 
                0 8px 10px -6px rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(71, 85, 105, 0.3);
}

.tools-group, .colors-group, .actions-group {
    display: flex;
    gap: 8px;
    align-items: center;
}

.tool-btn {
    padding: 10px;
    border: none;
    background: #f1f5f9;
    color: #1f2937;
    cursor: pointer;
    border-radius: 10px;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.dark-mode .tool-btn {
    background: rgba(51, 65, 85, 0.7);
    color: #e2e8f0;
}

.tool-btn:hover {
    background: #e2e8f0;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.dark-mode .tool-btn:hover {
    background: rgba(71, 85, 105, 0.9);
}

.tool-btn.active {
    background: #3b82f6;
    color: white;
    transform: scale(1.05);
    box-shadow: 0 4px 10px rgba(59, 130, 246, 0.3);
}

.tool-btn.active:hover {
    background: #2563eb;
}

.tool-btn svg {
    width: 20px;
    height: 20px;
}

.color-control {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(241, 245, 249, 0.7);
    padding: 8px 12px;
    border-radius: 12px;
}

.dark-mode .color-control {
    background: rgba(30, 41, 59, 0.7);
}

.color-control label {
    font-size: 12px;
    font-weight: 600;
    color: #475569;
}

.dark-mode .color-control label {
    color: #94a3b8;
}

input[type="color"] {
    width: 30px;
    height: 30px;
    border: none;
    border-radius: 6px;
    padding: 0;
    cursor: pointer;
    background: transparent;
}

input[type="color"]::-webkit-color-swatch {
    border: none;
    border-radius: 4px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.slider-control {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(241, 245, 249, 0.7);
    padding: 8px 12px;
    border-radius: 12px;
}

.dark-mode .slider-control {
    background: rgba(30, 41, 59, 0.7);
}

.slider-control label {
    font-size: 12px;
    font-weight: 600;
    color: #475569;
}

.dark-mode .slider-control label {
    color: #94a3b8;
}

input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 80px;
    height: 6px;
    background: #cbd5e1;
    border-radius: 3px;
    outline: none;
}

.dark-mode input[type="range"] {
    background: #475569;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: #3b82f6;
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    transition: all 0.2s;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 3px 6px rgba(0, 0, 0, 0.25);
}

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 36px;
    height: 20px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-switch label {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #cbd5e1;
    transition: .4s;
    border-radius: 34px;
}

.dark-mode .toggle-switch label {
    background-color: #475569;
}

.toggle-switch label:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 2px;
    bottom: 2px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + label {
    background-color: #3b82f6;
}

input:checked + label:before {
    transform: translateX(16px);
}

.zoom-controls {
    position: fixed;
    bottom: 50px;
    right: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 1000;
}

.zoom-btn {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid rgba(203, 213, 225, 0.3);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 18px;
    font-weight: bold;
    color: #334155;
    transition: all 0.2s;
}

.dark-mode .zoom-btn {
    background: rgba(30, 41, 59, 0.9);
    color: #e2e8f0;
    border-color: rgba(71, 85, 105, 0.3);
}

.zoom-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.15);
}

.status-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.9);
    padding: 10px 20px;
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    font-weight: 500;
    color: #475569;
    z-index: 1000;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
    backdrop-filter: blur(5px);
}

.dark-mode .status-bar {
    background: rgba(30, 41, 59, 0.9);
    color: #94a3b8;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.2);
}

.embed-dialog {
    position: fixed;
    background: rgba(255, 255, 255, 0.95);
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.2);
    z-index: 2000;
    width: 320px;
    display: none;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(203, 213, 225, 0.4);
}

.dark-mode .embed-dialog {
    background: rgba(30, 41, 59, 0.95);
    border-color: rgba(71, 85, 105, 0.4);
}

.embed-dialog h3 {
    margin-bottom: 15px;
    color: #1e293b;
    font-size: 18px;
}

.dark-mode .embed-dialog h3 {
    color: #e2e8f0;
}

.embed-dialog select,
.embed-dialog input {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    background: white;
    color: #1e293b;
    font-size: 14px;
}

.dark-mode .embed-dialog select,
.dark-mode .embed-dialog input {
    background: rgba(15, 23, 42, 0.7);
    border-color: #334155;
    color: #e2e8f0;
}

.embed-dialog button {
    padding: 10px 16px;
    background: #3b82f6;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s;
}

.embed-dialog button:hover {
    background: #2563eb;
    transform: translateY(-2px);
}

.embed-dialog button.cancel {
    background: #f1f5f9;
    color: #64748b;
}

.dark-mode .embed-dialog button.cancel {
    background: #334155;
    color: #cbd5e1;
}

.embed-dialog .dialog-actions {
    display: flex;
    gap: 10px;
    margin-top: 10px;
}

#youtubeOptions {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
}

#youtubeOptions label {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 14px;
    color: #475569;
}

.dark-mode #youtubeOptions label {
    color: #94a3b8;
}

.embed-container {
    position: absolute;
    border: 2px solid #3b82f6;
    border-radius: 8px;
    overflow: hidden;
    background: white;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.dark-mode .embed-container {
    background: #1e293b;
    border-color: #60a5fa;
}

.embed-container iframe {
    width: 100%;
    height: 100%;
    border: none;
}

.resize-handle {
    position: absolute;
    right: 0;
    bottom: 0;
    width: 12px;
    height: 12px;
    background: #3b82f6;
    cursor: nwse-resize;
    border-radius: 2px 0 0 0;
}

.dark-mode .resize-handle {
    background: #60a5fa;
}