/* css/theme.css - 全局亮暗模式样式（所有页面共用） */
/* 1. 亮暗模式核心变量 */
:root {
    --bg-color: #f9f7f5;
    --text-color: #333;
    --primary-color: #4a3c2e;
    --secondary-color: #c8a985;
    --tertiary-color: #d4c3b3;
    --card-bg: #fff;
    --footer-bg: #f5f2ef;
    --link-hover: #a68a6d;
    --shadow-color: rgba(0,0,0,0.08);
}

.dark-mode {
    --bg-color: #1a1815;
    --text-color: #e8e3db;
    --primary-color: #d8c3a5;
    --secondary-color: #8d785c;
    --tertiary-color: #5c4f42;
    --card-bg: #2a2722;
    --footer-bg: #24211d;
    --link-hover: #b89c78;
    --shadow-color: rgba(0,0,0,0.2);
}

/* 2. 全局主题过渡（保证切换流畅） */
body {
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* 3. 主题切换按钮样式（淡入淡出，无旋转） */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px var(--shadow-color);
    z-index: 9998;
    transition: background-color 0.4s ease, opacity 0.4s ease, transform 0.4s ease, box-shadow 0.4s ease;
    outline: none;
    -webkit-tap-highlight-color: transparent;
    opacity: 0.9;
}

.theme-toggle:hover {
    background-color: var(--secondary-color);
    transform: scale(1.08);
    box-shadow: 0 4px 12px var(--shadow-color);
    opacity: 1;
}

.theme-toggle i {
    transition: opacity 0.5s ease, color 0.3s ease;
    opacity: 0.9;
}

.theme-toggle:hover i {
    opacity: 1;
}

@media (max-width: 768px) {
    .theme-toggle {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
}