/* ============================================
   基础样式：CSS 变量、Reset、全局、登录页
   ============================================ */

:root {
    --primary-color: #ff9a9e;
    --secondary-color: #fecfef;
    --text-color: #555;
    --bg-color: #fff0f5;
    /* 淡紫红 */
    --card-bg: #ffffff;
    --accent-color: #ff6b6b;
}

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

body {
    font-family: 'Noto Serif SC', serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    overflow-x: hidden;
}

/* --- 登录遮罩层 (index.html 使用) --- */
#login-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #ff9a9e 0%, #fecfef 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.login-box {
    background: white;
    padding: 2rem 3rem;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    text-align: center;
    max-width: 90%;
}

.login-box h1 {
    font-family: 'Dancing Script', cursive;
    color: var(--accent-color);
    font-size: 3rem;
    margin-bottom: 1rem;
}

.login-box input {
    display: block;
    width: 100%;
    padding: 10px;
    margin: 15px 0;
    border: 2px solid #eee;
    border-radius: 5px;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s;
}

.login-box input:focus {
    border-color: var(--primary-color);
}

.login-box button {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 25px;
    font-size: 1.1rem;
    border-radius: 25px;
    cursor: pointer;
    transition: transform 0.2s, background 0.3s;
}

.login-box button:hover {
    background: var(--accent-color);
    transform: scale(1.05);
}

/* --- 主要内容淡入 --- */
#main-content {
    opacity: 0;
    transition: opacity 1s ease-in;
}

#main-content.visible {
    opacity: 1;
}