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

body {
    font-family: 'Microsoft YaHei', 'Segoe UI', Arial, sans-serif;
    overflow: hidden;
    background: #000;
    color: #fff;
}

#info {
    position: absolute;
    top: 15px;
    left: 15px;
    z-index: 100;
    background: rgba(0, 0, 0, 0.6);
    padding: 12px 20px;
    border-radius: 8px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

#info h1 {
    font-size: 20px;
    margin: 0;
    color: #4a9eff;
    font-weight: 600;
}

canvas {
    display: block;
}

/* 设置图标按钮 */
.settings-icon {
    position: absolute;
    top: 15px;
    right: 15px;
    z-index: 101;
    width: 45px;
    height: 45px;
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 50%;
    color: #fff;
    font-size: 22px;
    cursor: pointer;
    backdrop-filter: blur(10px);
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

.settings-icon:hover {
    background: rgba(74, 158, 255, 0.4);
    border-color: #4a9eff;
    transform: rotate(90deg);
    box-shadow: 0 0 15px rgba(74, 158, 255, 0.5);
}

.settings-icon:active {
    transform: rotate(90deg) scale(0.95);
}

/* 控制面板 */
.control-panel {
    position: absolute;
    top: 70px;
    right: 15px;
    z-index: 100;
    background: rgba(0, 0, 0, 0.7);
    padding: 15px;
    border-radius: 10px;
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    min-width: 220px;
    max-width: 260px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    transform-origin: top right;
    animation: slideIn 0.3s ease-out;
}

.control-panel.hidden {
    display: none;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.panel-header span {
    color: #fff;
    font-size: 14px;
    font-weight: 600;
}

.close-btn {
    background: transparent;
    border: none;
    color: #aaa;
    font-size: 18px;
    cursor: pointer;
    padding: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: all 0.2s;
}

.close-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 12px;
}

.mode-btn {
    padding: 10px 12px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 6px;
    color: #fff;
    cursor: pointer;
    font-size: 13px;
    transition: all 0.3s;
    font-weight: 500;
}

.mode-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-1px);
}

.mode-btn.active {
    background: rgba(74, 158, 255, 0.4);
    border-color: #4a9eff;
    box-shadow: 0 0 10px rgba(74, 158, 255, 0.3);
}

.panel {
    padding: 12px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 6px;
    margin-top: 8px;
}

.time-display {
    text-align: center;
    margin-bottom: 8px;
}

#currentTime {
    color: #4a9eff;
    font-size: 28px;
    font-weight: bold;
    display: block;
    font-family: 'Consolas', 'Monaco', monospace;
    letter-spacing: 2px;
}

.info-label {
    color: #aaa;
    font-size: 12px;
    text-align: center;
}

#periodSlider {
    width: 100%;
    margin: 8px 0 0 0;
    cursor: pointer;
}

#periodValue {
    color: #4a9eff;
    font-weight: bold;
}

label {
    color: #fff;
    font-size: 13px;
}

.label-text {
    display: block;
    margin-bottom: 8px;
    color: #ddd;
}

#loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    z-index: 200;
    background: rgba(0, 0, 0, 0.8);
    padding: 30px 40px;
    border-radius: 12px;
    backdrop-filter: blur(10px);
}

#loading.hidden {
    display: none;
}

.loader {
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    border-top: 3px solid #4a9eff;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto 15px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

#loading p {
    color: #aaa;
    font-size: 14px;
    margin: 0;
}

/* 平板适配 (768px以下) */
@media (max-width: 768px) {
    #info {
        top: 10px;
        left: 10px;
        padding: 8px 15px;
    }

    #info h1 {
        font-size: 16px;
    }

    .settings-icon {
        top: 10px;
        right: 10px;
        width: 40px;
        height: 40px;
        font-size: 20px;
    }

    .control-panel {
        top: 60px;
        right: 10px;
        min-width: 200px;
        max-width: 220px;
        padding: 12px;
    }

    .panel-header span {
        font-size: 13px;
    }

    .mode-btn {
        padding: 8px 10px;
        font-size: 12px;
    }

    #currentTime {
        font-size: 22px;
    }

    .panel {
        padding: 10px;
    }
}

/* 手机适配 (480px以下) */
@media (max-width: 480px) {
    #info {
        top: 10px;
        left: 10px;
        right: 10px;
        padding: 8px 12px;
    }

    #info h1 {
        font-size: 14px;
        text-align: center;
    }

    .settings-icon {
        top: 10px;
        right: 10px;
        width: 38px;
        height: 38px;
        font-size: 18px;
    }

    .control-panel {
        position: fixed;
        top: auto;
        bottom: 10px;
        left: 10px;
        right: 10px;
        max-width: none;
        padding: 12px;
    }

    .panel-header span {
        font-size: 12px;
    }

    .control-group {
        flex-direction: row;
        gap: 6px;
    }

    .mode-btn {
        flex: 1;
        padding: 8px 6px;
        font-size: 11px;
    }

    #currentTime {
        font-size: 20px;
        letter-spacing: 1px;
    }

    .info-label {
        font-size: 10px;
    }

    .label-text {
        font-size: 11px;
    }

    .panel {
        padding: 8px;
    }

    #loading {
        padding: 20px 30px;
    }

    .loader {
        width: 35px;
        height: 35px;
    }

    #loading p {
        font-size: 12px;
    }
}

/* 超小屏幕 (360px以下) */
@media (max-width: 360px) {
    #info h1 {
        font-size: 12px;
    }

    .settings-icon {
        width: 35px;
        height: 35px;
        font-size: 16px;
    }

    .mode-btn {
        font-size: 10px;
        padding: 6px 4px;
    }

    #currentTime {
        font-size: 18px;
    }

    .control-panel {
        padding: 10px;
    }
}