* {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", Arial, sans-serif;
}

html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    background: #404040;
}

.container {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 0;
    overflow: hidden;
}

.inner-container {
    max-height: 100vh;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.inner-container > * + * {
    margin-top: 1rem;
}

.canvas-container {
    flex: 1;
    min-height: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

.canvas-container > canvas {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    display: block;
}

.button-group {
    text-align: center;
    font-size: 1rem;
    user-select: none;
}

.button-group > * + * {
    margin-left: 1rem;
}

.button {
    appearance: none;
    border: 0;
    outline: 0;
    font: inherit;
    width: 16rem;
    padding: 0.8rem 2rem;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border-radius: 0.25em;
    box-shadow: 0 0 1em 0 rgba(62, 175, 238, 0.16);
    cursor: pointer;
}

.button:hover {
    background: rgba(255, 255, 255, 0.3);
    box-shadow: 0 0 1em 0 rgba(62, 175, 238, 0.4);
}

.input-container {
    background: rgba(0, 0, 0, 0.5);
    padding: 1rem;
    border-radius: 4px;
    font-size: 14px;
}

.input-group {
    display: flex;
    align-items: center;
    margin-bottom: 0.5rem;
}

.input-group > input[type="range"] {
    width: 200px;
    margin-right: 1rem;
}

.input-group > label {
    color: white;
    min-width: 120px;
    text-align: left;
    font-size: 14px;
}

.control-group {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    margin-top: 1rem;
    padding: 0.5rem;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 4px;
}

.control-group .input-group {
    margin-bottom: 0;
}

.control-group .input-group > label {
    min-width: auto;
    margin-left: 0.5rem;
    color: white;
}

input[type="color"] {
    width: 40px;
    height: 24px;
    padding: 0;
    border: none;
    border-radius: 4px;
}

input[type="checkbox"] {
    width: 16px;
    height: 16px;
}

.input-group-with-button {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.5rem;
}

.apply-button {
    padding: 0.5rem 1rem;
    background: #3498db;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
}

.apply-button:hover {
    background: #2980b9;
}