:root {
    --bg-color: #ffffff;
    --text-color: #333333;
    --border-color: #dddddd;
    --header-bg: #f8f9fa;
    --tab-inactive: #eeeeee;
    --tab-active: #007bff;
    --tab-active-text: #ffffff;
    --input-bg: #ffffff;
    --accent-color: #007bff;
    --card-bg: #ffffff;
    --shadow: 0 2px 5px rgba(0,0,0,0.1);
}

[data-theme="dark"] {
    --bg-color: #1a1a1a;
    --text-color: #e0e0e0;
    --border-color: #444444;
    --header-bg: #2d2d2d;
    --tab-inactive: #333333;
    --tab-active: #375a7f;
    --input-bg: #2d2d2d;
    --card-bg: #2d2d2d;
    --shadow: 0 2px 10px rgba(0,0,0,0.3);
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --bg-color: #1a1a1a;
        --text-color: #e0e0e0;
        --border-color: #444444;
        --header-bg: #2d2d2d;
        --tab-inactive: #333333;
        --tab-active: #375a7f;
        --input-bg: #2d2d2d;
        --card-bg: #2d2d2d;
        --shadow: 0 2px 10px rgba(0,0,0,0.3);
    }
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 20px;
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

nav {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

nav button {
    padding: 10px 20px;
    cursor: pointer;
    border: 1px solid var(--border-color);
    background-color: var(--tab-inactive);
    color: var(--text-color);
    border-radius: 4px;
    transition: all 0.2s;
}

nav button.active {
    background-color: var(--tab-active);
    color: var(--tab-active-text);
    border-color: var(--tab-active);
}

.tab-content {
    background-color: var(--card-bg);
    padding: 25px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: var(--shadow);
}

table {
    border-collapse: collapse;
    width: 100%;
    margin-bottom: 20px;
}

td {
    padding: 12px;
    border: 1px solid var(--border-color);
}

td:first-child {
    background-color: var(--header-bg);
    font-weight: 500;
}

input, select {
    width: 100%;
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--input-bg);
    color: var(--text-color);
    box-sizing: border-box;
}

input[type="radio"] {
    width: auto;
    margin-right: 5px;
}

.gear-container {
    display: flex;
    gap: 8px;
    align-items: center;
}

.gear-container select {
    flex: 1;
}

.gear-container input {
    width: 80px;
}

.results {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.result-card {
    padding: 15px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--header-bg);
}

.result-card h3 {
    margin-top: 0;
    font-size: 1rem;
    color: var(--accent-color);
}

.result-card p {
    margin: 5px 0;
    font-size: 1.1rem;
    font-weight: bold;
}

.theme-toggle-container {
    display: flex;
    align-items: center;
    gap: 10px;
}

.theme-switch {
    position: relative;
    width: 96px; /* 30px * 3 + 6px padding */
    height: 34px;
    background-color: var(--tab-inactive);
    border-radius: 20px;
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    padding: 0 3px;
    cursor: pointer;
    user-select: none;
    box-sizing: border-box;
}

.theme-switch .icon {
    width: 30px; /* 固定宽度槽位 */
    height: 30px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 14px;
    z-index: 1;
    opacity: 0.5;
    transition: opacity 0.3s;
}

.theme-switch .slider {
    position: absolute;
    top: 1px; /* 微调上下居中 */
    left: 2px; /* 初始偏移 */
    width: 30px;
    height: 30px;
    background-color: var(--tab-active);
    border-radius: 50%;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
    z-index: 0;
}

/* 完美步长：30px 每格 */
[data-theme-setting="light"] .theme-switch .slider { transform: translateX(0); }
[data-theme-setting="auto"] .theme-switch .slider { transform: translateX(30px); }
[data-theme-setting="dark"] .theme-switch .slider { transform: translateX(60px); }

[data-theme-setting="light"] .theme-switch .icon-light { opacity: 1; }
[data-theme-setting="auto"] .theme-switch .icon-auto { opacity: 1; }
[data-theme-setting="dark"] .theme-switch .icon-dark { opacity: 1; }

.icon-auto {
    font-size: 12px !important;
    font-weight: bold;
}

@media (max-width: 600px) {
    body {
        padding: 10px;
    }

    td {
        display: block;
        width: 100% !important;
    }

    td:first-child {
        border-bottom: none;
    }
}