/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #121212;
    color: #e0e0e0;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

/* 容器样式 */
.login-container {
    width: 100%;
    max-width: 400px;
    background-color: #1e1e1e;
    border-radius: 8px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
    overflow: hidden;
}

/* 头部样式 */
.login-header {
    background-color: #2d2d2d;
    padding: 20px;
    text-align: center;
    border-bottom: 1px solid #3d3d3d;
}

.login-header h1 {
    font-size: 24px;
    margin-bottom: 8px;
    color: #ffffff;
}

.login-header p {
    font-size: 14px;
    color: #b0b0b0;
}

/* 安全标识 */
.security-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #2d2d2d;
    color: #4cd964;
    font-size: 12px;
    padding: 6px 12px;
    margin: -15px auto 20px;
    width: fit-content;
    border-radius: 12px;
    border: 1px solid #4cd96433;
    position: relative;
    z-index: 1;
}

.security-badge::before {
    content: "🔒";
    margin-right: 6px;
}

/* 表单样式 */
.login-form {
    padding: 25px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    color: #b0b0b0;
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    background-color: #2d2d2d;
    border: 1px solid #3d3d3d;
    border-radius: 4px;
    color: #e0e0e0;
    font-size: 16px;
    transition: border-color 0.3s;
}

.form-control::placeholder {
    color: #6d6d6d;
}

.form-control:focus {
    outline: none;
    border-color: #0078d7;
}

.password-wrapper {
    position: relative;
}

.toggle-password {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: #6d6d6d;
    cursor: pointer;
    font-size: 14px;
}

.toggle-password:hover {
    color: #e0e0e0;
}

/* 按钮样式 */
.btn {
    width: 100%;
    padding: 12px;
    background-color: #0078d7;
    border: none;
    border-radius: 4px;
    color: white;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.3s;
}

.btn:hover {
    background-color: #005a9e;
}

/* 提示信息 */
.alert {
    padding: 12px 15px;
    border-radius: 4px;
    margin-bottom: 20px;
    font-size: 14px;
}

.alert-error {
    background-color: #721c2420;
    border: 1px solid #721c2440;
    color: #e74c3c;
}

.alert-success {
    background-color: #15572420;
    border: 1px solid #15572440;
    color: #2ecc71;
}

/* 底部信息 */
.login-footer {
    text-align: center;
    padding: 15px 25px;
    font-size: 12px;
    color: #6d6d6d;
    border-top: 1px solid #3d3d3d;
}

/* 动画效果 */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.login-container {
    animation: fadeIn 0.3s ease-in-out;
}