/* 共同体 小蓝本 - 用户登录页面美化样式 */
body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}

/* 背景动画效果 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(120, 219, 226, 0.2) 0%, transparent 50%);
    animation: float 6s ease-in-out infinite;
    z-index: -1;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(1deg); }
}

.container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

.login-container {
    max-width: 420px;
    width: 100%;
    padding: 50px 40px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    box-shadow: 
        0 25px 50px rgba(0, 0, 0, 0.15),
        0 0 0 1px rgba(255, 255, 255, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.4);
    position: relative;
    overflow: hidden;
    animation: slideUp 0.8s ease-out;
}

.login-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2, #f093fb);
    background-size: 200% 100%;
    animation: gradientShift 3s ease infinite;
}

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

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.login-header {
    text-align: center;
    margin-bottom: 40px;
    position: relative;
}

.login-header h2 {
    color: #2c3e50;
    font-weight: 700;
    margin-bottom: 12px;
    font-size: 2.4rem;
    background: linear-gradient(135deg, #2c3e50, #667eea);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-header p {
    color: #6c757d;
    font-size: 1.1rem;
    margin: 0;
    font-weight: 400;
    opacity: 0.8;
}

/* 表单样式增强 */
.form-group {
    margin-bottom: 28px;
    position: relative;
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    color: #495057;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.form-control {
    border: 2px solid #e9ecef;
    border-radius: 12px;
    padding: 16px 20px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.9);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.form-control:focus {
    border-color: #667eea;
    box-shadow: 
        0 0 0 0.2rem rgba(102, 126, 234, 0.15),
        0 4px 20px rgba(102, 126, 234, 0.1);
    background: #fff;
    transform: translateY(-2px);
}

.form-control::placeholder {
    color: #adb5bd;
    font-weight: 400;
}

/* 复选框样式美化 */
.form-check {
    margin-bottom: 25px;
    display: flex;
    align-items: center;
}

.form-check-input {
    width: 20px;
    height: 20px;
    margin-right: 12px;
    border: 2px solid #dee2e6;
    border-radius: 6px;
    transition: all 0.3s ease;
    cursor: pointer;
}

.form-check-input:checked {
    background-color: #667eea;
    border-color: #667eea;
    box-shadow: 0 2px 10px rgba(102, 126, 234, 0.3);
}

.form-check-label {
    color: #495057;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: color 0.3s ease;
}

.form-check-label:hover {
    color: #667eea;
}

/* 按钮样式美化 */
.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    border-radius: 12px;
    padding: 16px 20px;
    font-size: 1.1rem;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(102, 126, 234, 0.5);
    background: linear-gradient(135deg, #5a6fd8 0%, #6a4190 100%);
}

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

.btn-primary:active {
    transform: translateY(-1px);
}

.btn-block {
    width: 100%;
}

/* 登录选项样式 */
.login-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 30px;
    padding-top: 25px;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.login-options a {
    color: #667eea;
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.login-options a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: #667eea;
    transition: width 0.3s ease;
}

.login-options a:hover {
    color: #5a6fd8;
    text-decoration: none;
}

.login-options a:hover::after {
    width: 100%;
}

/* 微信登录按钮美化 */
.text-center.mt-4 {
    margin-top: 35px;
    padding-top: 30px;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.text-center.mt-4 p {
    color: #6c757d;
    margin-bottom: 20px;
    font-size: 0.95rem;
    font-weight: 500;
}

.btn-outline-secondary {
    border: 2px solid #28a745;
    border-radius: 12px;
    padding: 12px 24px;
    font-weight: 500;
    transition: all 0.3s ease;
    color: #28a745;
    background: transparent;
    box-shadow: 0 4px 15px rgba(40, 167, 69, 0.2);
}

.btn-outline-secondary:hover {
    background-color: #28a745;
    border-color: #28a745;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(40, 167, 69, 0.3);
    color: white;
}

.btn-outline-secondary i {
    margin-right: 8px;
}

/* 警告框样式美化 */
.alert {
    border-radius: 12px;
    padding: 18px 20px;
    margin-bottom: 25px;
    font-size: 0.95rem;
    border: none;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.alert-success {
    background: linear-gradient(135deg, #d4edda 0%, #c3e6cb 100%);
    color: #155724;
    border-left: 4px solid #28a745;
}

.alert-danger {
    background: linear-gradient(135deg, #f8d7da 0%, #f5c6cb 100%);
    color: #721c24;
    border-left: 4px solid #dc3545;
}

.alert-info {
    background: linear-gradient(135deg, #d1ecf1 0%, #bee5eb 100%);
    color: #0c5460;
    border-left: 4px solid #17a2b8;
}

/* 响应式设计 */
@media (max-width: 576px) {
    .login-container {
        margin: 20px;
        padding: 40px 30px;
        max-width: none;
    }
    
    .login-header h2 {
        font-size: 2rem;
    }
    
    .login-options {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .btn-block {
        padding: 16px 20px;
    }
    
    .form-control {
        padding: 14px 18px;
    }
}

/* 加载动画 */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.loading {
    animation: pulse 1.5s ease-in-out infinite;
}

/* 输入框焦点增强效果 */
.form-control:focus + .input-focus-border {
    transform: scaleX(1);
}

/* 选择框美化 */
select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%236c757d' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14 2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 15px center;
    background-size: 16px;
    padding-right: 45px;
}

select.form-control:focus {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%23667eea' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14 2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");
}

/* 悬停效果增强 */
.login-container:hover {
    transform: translateY(-5px);
    box-shadow: 
        0 35px 60px rgba(0, 0, 0, 0.2),
        0 0 0 1px rgba(255, 255, 255, 0.4);
}

/* 表单组悬停效果 */
.form-group:hover label {
    color: #667eea;
}

/* 复选框悬停效果 */
.form-check:hover .form-check-input {
    border-color: #667eea;
}

.form-check:hover .form-check-label {
    color: #667eea;
}

/* 按钮加载状态 */
.btn-primary.loading {
    pointer-events: none;
    opacity: 0.8;
}

.btn-primary.loading .btn-text {
    visibility: hidden;
}

.btn-primary.loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    top: 50%;
    left: 50%;
    margin-left: -10px;
    margin-top: -10px;
    border: 2px solid transparent;
    border-top-color: #ffffff;
    border-radius: 50%;
    animation: button-loading-spinner 1s ease infinite;
}

@keyframes button-loading-spinner {
    from {
        transform: rotate(0turn);
    }
    to {
        transform: rotate(1turn);
    }
}

/* 暗色主题支持 */
@media (prefers-color-scheme: dark) {
    .login-container {
        background: rgba(40, 44, 52, 0.95);
        color: #ffffff;
    }
    
    .login-header h2 {
        background: linear-gradient(135deg, #ffffff, #667eea);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
    
    .login-header p {
        color: #b0b7c3;
    }
    
    .form-group label {
        color: #e9ecef;
    }
    
    .form-control {
        background: rgba(255, 255, 255, 0.1);
        border-color: #495057;
        color: #ffffff;
    }
    
    .form-control:focus {
        background: rgba(255, 255, 255, 0.15);
        color: #ffffff;
    }
    
    .form-control::placeholder {
        color: #6c757d;
    }
    
    .form-check-label {
        color: #e9ecef;
    }
}