/* 登录页面样式 */

/* 渐变背景 */
body.login-page {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    position: relative;
    overflow: hidden;
}

/* 背景动画装饰 */
body.login-page::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: backgroundMove 20s linear infinite;
}

@keyframes backgroundMove {
    0% {
        transform: translate(0, 0);
    }
    100% {
        transform: translate(50px, 50px);
    }
}

/* 登录容器 */
.login-container {
    max-width: 700px;
    width: 100%;
    padding: 20px;
    position: relative;
    z-index: 1;
}

/* 登录卡片 */
.login-card {
    background: #ffffff;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
    animation: slideUp 0.6s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 卡片头部 */
.login-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 35px 80px;
    text-align: center;
    position: relative;
}

.login-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 20px;
    background: #ffffff;
    border-radius: 20px 20px 0 0;
}

/* Logo图标 */
.login-logo {
    width: 70px;
    height: 70px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 15px;
    backdrop-filter: blur(10px);
    border: 3px solid rgba(255, 255, 255, 0.3);
}

.login-logo i {
    font-size: 35px;
    color: #ffffff;
}

/* 标题 */
.login-title {
    color: #ffffff;
    font-size: 26px;
    font-weight: 700;
    margin: 0;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.login-subtitle {
    color: rgba(255, 255, 255, 0.9);
    font-size: 14px;
    margin-top: 5px;
}

/* 表单区域 */
.login-body {
    padding: 35px 80px;
}

/* 输入框样式 */
.login-body .form-label {
    color: #333;
    font-weight: 600;
    margin-bottom: 8px;
    font-size: 14px;
}

.login-body .input-group {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    border-radius: 10px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.login-body .input-group:focus-within {
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
    transform: translateY(-2px);
}

.login-body .input-group-text {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #ffffff;
    border: none;
    padding: 12px 15px;
}

.login-body .form-control {
    border: none;
    padding: 12px 15px;
    font-size: 15px;
}

.login-body .form-control:focus {
    box-shadow: none;
    border-color: transparent;
}

/* 登录按钮 */
.login-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    padding: 14px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 10px;
    color: #ffffff;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
    position: relative;
    overflow: hidden;
}

.login-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.2);
    transition: left 0.5s ease;
}

.login-btn:hover::before {
    left: 100%;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

.login-btn:active {
    transform: translateY(0);
}

/* 提示文字 */
.login-footer {
    padding: 20px 80px;
    background: #f8f9fa;
    text-align: center;
    border-top: 1px solid #e9ecef;
}

.login-footer small {
    color: #6c757d;
    font-size: 13px;
}

.login-footer .badge {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 6px 12px;
    border-radius: 20px;
    font-weight: 500;
}

/* 错误提示 */
.login-body .alert {
    border-radius: 10px;
    border: none;
    animation: shake 0.5s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

.login-body .alert-danger {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: #ffffff;
}

.login-body .alert-success {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: #ffffff;
}

.login-body .alert .btn-close {
    filter: brightness(0) invert(1);
}

/* 响应式设计 */
@media (max-width: 576px) {
    .login-container {
        padding: 15px;
    }
    
    .login-header {
        padding: 30px 20px;
    }
    
    .login-body {
        padding: 30px 20px;
    }
    
    .login-logo {
        width: 60px;
        height: 60px;
    }
    
    .login-logo i {
        font-size: 30px;
    }
    
    .login-title {
        font-size: 24px;
    }
}

/* 额外的视觉效果 */
.floating {
    animation: floating 3s ease-in-out infinite;
}

@keyframes floating {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}