/* 文件名: style.css */

/* --- 基础与变量定义 --- */
:root {
    --background-color-light: #f5f5f5;
    --text-color-light: #333;
    --secondary-text-color-light: #777;
    --accent-color-light: #555;

    --background-color-dark: #121212;
    --text-color-dark: #e0e0e0;
    --secondary-text-color-dark: #888;
    --accent-color-dark: #bbb;

    --font-serif: 'Noto Serif SC', serif;
}

body {
    font-family: var(--font-serif);
    font-weight: 300;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    transition: background-color 0.5s, color 0.5s;
    background-color: var(--background-color-light);
    color: var(--text-color-light);
}

body.dark-mode {
    background-color: var(--background-color-dark);
    color: var(--text-color-dark);
}

/* --- 布局与容器 --- */
.container {
    text-align: center;
    padding: 2rem;
    width: 90%;
    max-width: 600px;
}

.view {
    display: none;
}

.view.active {
    display: block;
}

/* --- 交互元素 --- */
.toggle-button {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: 1px solid;
    border-color: var(--secondary-text-color-light);
    color: var(--secondary-text-color-light);
    padding: 8px 16px;
    font-family: var(--font-serif);
    cursor: pointer;
    transition: all 0.3s;
    border-radius: 4px;
}

body.dark-mode .toggle-button {
    border-color: var(--secondary-text-color-dark);
    color: var(--secondary-text-color-dark);
}

.toggle-button:hover {
    background-color: var(--text-color-light);
    color: var(--background-color-light);
}

body.dark-mode .toggle-button:hover {
    background-color: var(--text-color-dark);
    color: var(--background-color-dark);
}

input[type="datetime-local"], input[type="range"] {
    margin-top: 1rem;
    font-family: var(--font-serif);
}

/* --- 显示区域 --- */
.time-display p {
    font-size: 1.2rem;
    color: var(--secondary-text-color-light);
    margin-bottom: 0.5rem;
}

body.dark-mode .time-display p {
    color: var(--secondary-text-color-dark);
}

.main-counter {
    font-size: 2rem;
    font-weight: 400;
    letter-spacing: 1px;
    line-height: 1.5;
}

.stats-display {
    margin-top: 2rem;
    font-size: 1rem;
    line-height: 2;
    color: var(--secondary-text-color-light);
}

body.dark-mode .stats-display {
    color: var(--secondary-text-color-dark);
}

/* --- 滑块样式 --- */
input[type=range] {
    -webkit-appearance: none;
    width: 80%;
    background: transparent;
}

input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    height: 16px;
    width: 16px;
    border-radius: 50%;
    background: var(--accent-color-light);
    cursor: pointer;
    margin-top: -6px; /* 垂直居中 */
}

body.dark-mode input[type=range]::-webkit-slider-thumb {
    background: var(--accent-color-dark);
}

input[type=range]::-webkit-slider-runnable-track {
    width: 100%;
    height: 4px;
    cursor: pointer;
    background: var(--secondary-text-color-light);
    border-radius: 2px;
}

body.dark-mode input[type=range]::-webkit-slider-runnable-track {
    background: var(--secondary-text-color-dark);
}

/* --- 响应式设计 --- */
@media (max-width: 600px) {
    .main-counter {
        font-size: 1.5rem;
    }
    .time-display p {
        font-size: 1rem;
    }
    .toggle-button {
        padding: 6px 12px;
        font-size: 0.8rem;
    }
}