/* 🎨 淡紫色主题色彩体系 */
:root {
    --primary-light: #f0e6ff;
    --primary-medium: #d8c8f0;
    --primary-dark: #b28fce;
    --accent-pink: #ffd1dc;
    --accent-mint: #d4f0f0;
    --text-soft: #5d5d81;
    --text-dark: #3a3a5d;
    --shadow-soft: rgba(178, 143, 206, 0.15);
}

html, body {
    height: 100%;
}

* {
    box-sizing: border-box;
    transition: all 0.3s ease;
}

body {
    font-family: 'Comic Neue', 'Nunito', 'Arial', sans-serif;
    background: linear-gradient(135deg, #f9f5ff 0%, #f0e6ff 100%);
    min-height: 100vh;
    margin: 0;
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-dark);
    line-height: 1.6;
}

/* 登录容器美化 */
.login-container {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 25px;
    padding: 40px 35px;
    box-shadow: 0 15px 35px var(--shadow-soft);
    border: 2px solid var(--primary-light);
    max-width: 420px;
    width: 100%;
    position: relative;
    overflow: hidden;
    animation: float 6s ease-in-out infinite;
}

.login-container::before {
    content: "";
    position: absolute;
    top: -20px;
    right: -20px;
    width: 80px;
    height: 80px;
    background: var(--accent-pink);
    border-radius: 50%;
    opacity: 0.3;
    z-index: 0;
}

.login-container::after {
    content: "";
    position: absolute;
    bottom: -30px;
    left: -30px;
    width: 100px;
    height: 100px;
    background: var(--accent-mint);
    border-radius: 50%;
    opacity: 0.2;
    z-index: 0;
}

h2 {
    text-align: center;
    color: var(--text-dark);
    margin-bottom: 30px;
    font-weight: 600;
    position: relative;
    z-index: 1;
}

h2::before {
    content: "💬";
    margin-right: 10px;
    font-size: 28px;
}

/* 针对平板电脑等中等屏幕的样式 (小于等于768px) */
@media (max-width: 768px) {
    .login-container {
        padding: 35px 30px;
    }
    h2 {
        font-size: 1.5em;
    }
}

/* 针对手机等小屏幕的样式 (小于等于480px) - 锁定一屏显示，禁止页面整体滚动 */
@media (max-width: 480px) {
    body {
        padding: 10px;
        display: flex;
        align-items: center;
        justify-content: center;
        height: 100vh;
        overflow: hidden; /* 禁止页面整体滚动 */
    }
    .login-container {
        padding: 25px 20px;
        margin: 10px auto; /* 添加自动外边距使其保持居中 */
        animation: none; /* 在小屏幕上可以取消浮动动画以提升性能 */
        max-height: 95vh;
        overflow-y: auto; /* 允许容器内部滚动 */
    }
    h2 {
        font-size: 1.3em;
    }
    /* 让输入框和按钮更适合触摸 */
    input[type="text"], input[type="password"], button {
        padding: 14px 16px;
        font-size: 16px; /* 防止iOS浏览器缩放 */
        min-height: 44px; /* 增加触摸目标大小 */
    }
    .test-accounts {
        padding: 15px;
        margin-top: 20px;
    }
    .test-accounts p {
        font-size: 13px; /* 在小屏幕上缩小测试信息字体 */
        word-break: break-all; /* 防止长链接换行溢出 */
    }
}

/* 表单组美化 */
.form-group {
    margin-bottom: 25px;
    position: relative;
    z-index: 1;
}

label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-soft);
    font-weight: 500;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

input[type="text"], input[type="password"] {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid var(--primary-light);
    border-radius: 15px;
    font-size: 16px;
    background: rgba(255, 255, 255, 0.9);
    transition: all 0.3s ease;
    font-family: inherit;
}

input[type="text"]:focus, input[type="password"]:focus {
    outline: none;
    border-color: var(--primary-medium);
    box-shadow: 0 0 0 4px rgba(201, 170, 246, 0.3);
    background: white;
    transform: translateY(-2px);
}

/* 按钮美化 */
button {
    background: linear-gradient(45deg, var(--primary-medium), var(--primary-dark));
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 15px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    width: 100%;
    position: relative;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    z-index: 1;
    min-height: 44px; /* 增加触摸目标大小 */
    -webkit-tap-highlight-color: transparent; /* 移除移动端点击高亮 */
    touch-action: manipulation; /* 优化触摸响应 */
}

button::after {
    content: "✨";
    margin-left: 8px;
}

button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(178, 143, 206, 0.6);
}

button:active {
    transform: scale(0.98);
}

/* 错误提示美化 */
.error {
    color: #ff6b6b;
    margin-top: 15px;
    padding: 12px 15px;
    background: rgba(255, 107, 107, 0.1);
    border: 1px solid rgba(255, 107, 107, 0.3);
    border-radius: 10px;
    text-align: center;
    font-size: 14px;
    position: relative;
    z-index: 1;
}

/* 测试账户信息美化 */
.test-accounts {
    margin-top: 30px;
    padding: 20px;
    background: rgba(240, 230, 255, 0.5);
    border-radius: 15px;
    border: 1px dashed var(--primary-light);
    position: relative;
    z-index: 1;
}

.test-accounts p:first-child {
    margin-top: 0;
    font-weight: 600;
    color: var(--text-dark);
    text-align: center;
    margin-bottom: 15px;
}

.test-accounts p {
    margin: 8px 0;
    color: var(--text-soft);
    font-size: 14px;
    padding: 5px 10px;
    background: rgba(255, 255, 255, 0.7);
    border-radius: 8px;
}

/* 装饰元素 */
.decoration {
    position: absolute;
    z-index: 0;
}

.decoration.heart {
    top: 20px;
    left: 20px;
    width: 20px;
    height: 20px;
    background: var(--accent-pink);
    opacity: 0.5;
    border-radius: 50%;
}

.decoration.star {
    bottom: 40px;
    right: 30px;
    width: 15px;
    height: 15px;
    background: var(--primary-medium);
    opacity: 0.4;
    clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
}

/* 动画效果 */
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}