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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #0c0c0c 0%, #1a1a2e 100%);
    color: #fff;
    overflow: hidden;
    height: 100vh;
}

#container {
    position: relative;
    width: 100%;
    height: 100%;
}

#canvas-container {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 1;
}

#camera-container {
    position: absolute;
    bottom: 20px;
    right: 20px;
    width: 200px;
    height: 150px;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
    z-index: 2;
    border: 2px solid rgba(255, 255, 255, 0.1);
}

#camera-feed {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: scaleX(-1);
}

#ui-panel {
    position: absolute;
    top: 20px;
    left: 20px;
    background: linear-gradient(135deg, rgba(10, 10, 20, 0.9), rgba(20, 20, 40, 0.9));
    border-radius: 20px;
    padding: 20px;
    width: 340px;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.5), 0 0 30px rgba(120, 115, 245, 0.15);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    z-index: 3;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 美化滚动条 */
#ui-panel::-webkit-scrollbar {
    width: 6px;
}

#ui-panel::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    margin: 10px 0;
}

#ui-panel::-webkit-scrollbar-thumb {
    background: linear-gradient(to bottom, #ff6ec7, #7873f5);
    border-radius: 10px;
    transition: background 0.3s ease;
}

#ui-panel::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(to bottom, #ff85d0, #928dff);
}

#ui-panel.collapsed {
    transform: translateX(-100%);
    opacity: 0;
    pointer-events: none;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
}

.panel-header::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 60px;
    height: 1px;
    background: linear-gradient(90deg, #ff6ec7, #7873f5);
}

.panel-title {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(90deg, #ff6ec7, #7873f5);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.toggle-panel {
    position: absolute;
    left: 10px;
    top: 20px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.15), rgba(255, 255, 255, 0.05));
    border: none;
    color: white;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 4;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.toggle-panel:hover {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.25), rgba(255, 255, 255, 0.15));
    transform: rotate(90deg) scale(1.1);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4);
}

/* 当面板收起时，调整按钮位置 */
#ui-panel.collapsed + .toggle-panel {
    left: 10px;
}

.control-group {
    margin-bottom: 25px;
    padding: 15px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all 0.3s ease;
}

.control-group:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.control-label {
    display: block;
    margin-bottom: 12px;
    font-weight: 600;
    color: #c0c0e0;
    font-size: 0.95rem;
    letter-spacing: 0.5px;
}

.shape-selector {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 10px;
}

.shape-btn {
    min-width: 0;
    background: linear-gradient(135deg, rgba(30, 30, 60, 0.8), rgba(40, 40, 80, 0.6));
    border: 2px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: 12px 8px;
    color: white;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    position: relative;
    overflow: hidden;
}

.shape-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.5s ease;
}

.shape-btn:hover {
    background: linear-gradient(135deg, rgba(50, 50, 100, 0.9), rgba(60, 60, 120, 0.8));
    border-color: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.3);
}

.shape-btn:hover::before {
    left: 100%;
}

.shape-btn.active {
    border-color: #7873f5;
    background: linear-gradient(135deg, rgba(120, 115, 245, 0.3), rgba(90, 85, 215, 0.2));
    box-shadow: 0 0 20px rgba(120, 115, 245, 0.3);
    transform: translateY(-2px);
}

.shape-btn.active::after {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    border: 2px solid transparent;
    border-radius: 12px;
    background: linear-gradient(45deg, #ff6ec7, #7873f5) border-box;
    -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: destination-out;
    mask-composite: exclude;
}

.shape-icon {
    font-size: 1.2rem;
}

.color-picker-container {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.color-picker {
    flex: 1;
    height: 40px;
    border-radius: 8px;
    border: 2px solid rgba(255, 255, 255, 0.1);
    cursor: pointer;
    transition: all 0.3s ease;
}

.color-picker:hover {
    border-color: rgba(255, 255, 255, 0.3);
    transform: scale(1.05);
}

.slider-container {
    margin-top: 15px;
}

.slider {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.1);
    outline: none;
    -webkit-appearance: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #7873f5;
    cursor: pointer;
    box-shadow: 0 0 10px rgba(120, 115, 245, 0.5);
}

.slider-value {
    text-align: center;
    margin-top: 8px;
    font-size: 0.95rem;
    color: #c0c0e0;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.05);
    padding: 6px 12px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    display: inline-block;
    margin-left: 10px;
}

.upload-btn {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #7873f5, #4a44c8);
    border: none;
    border-radius: 10px;
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    margin-top: 10px;
    box-shadow: 0 4px 12px rgba(120, 115, 245, 0.3);
}

.upload-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(120, 115, 245, 0.4);
}

.gesture-indicator {
    position: absolute;
    top: 20px;
    right: 20px;
    background: rgba(10, 10, 20, 0.8);
    border-radius: 10px;
    padding: 15px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    z-index: 3;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.gesture-icon {
    font-size: 2rem;
    color: #ff6ec7;
}

.gesture-text {
    font-size: 0.9rem;
    color: #b0b0d0;
}

.fullscreen-btn {
    position: absolute;
    bottom: 20px;
    left: 20px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(10, 10, 20, 0.8);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    z-index: 3;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.fullscreen-btn:hover {
    background: rgba(30, 30, 60, 0.9);
    transform: scale(1.1);
}

.instructions {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(10, 10, 20, 0.8);
    border-radius: 10px;
    padding: 15px 20px;
    font-size: 0.9rem;
    text-align: center;
    max-width: 500px;
    z-index: 3;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.instructions span {
    color: #ff6ec7;
    font-weight: 600;
}

.status {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(10, 10, 20, 0.9);
    padding: 30px 40px;
    border-radius: 15px;
    text-align: center;
    z-index: 10;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5);
}

.status h2 {
    margin-bottom: 15px;
    color: #7873f5;
}

.status p {
    margin-bottom: 20px;
    color: #b0b0d0;
    max-width: 400px;
}

.start-btn {
    padding: 12px 30px;
    background: linear-gradient(90deg, #7873f5, #4a44c8);
    border: none;
    border-radius: 8px;
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.start-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(120, 115, 245, 0.4);
}

.hidden {
    display: none !important;
}

#particle-count {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(10, 10, 20, 0.8);
    padding: 10px 20px;
    border-radius: 20px;
    font-size: 0.9rem;
    z-index: 3;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.gradient-checkbox {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 10px;
}

.gradient-checkbox input {
    width: 18px;
    height: 18px;
}

/* 音乐进度条样式补充 */
#music-progress::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #7873f5;
    cursor: pointer;
    box-shadow: 0 0 10px rgba(120, 115, 245, 0.5);
    transition: all 0.3s ease;
}
#music-progress::-webkit-slider-thumb:hover {
    background: #928dff;
    transform: scale(1.1);
    box-shadow: 0 0 15px rgba(120, 115, 245, 0.7);
}
#music-progress::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #7873f5;
    cursor: pointer;
    box-shadow: 0 0 10px rgba(120, 115, 245, 0.5);
    border: none;
    transition: all 0.3s ease;
}
#music-progress::-moz-range-thumb:hover {
    background: #928dff;
    transform: scale(1.1);
    box-shadow: 0 0 15px rgba(120, 115, 245, 0.7);
}