/**
 * 登录页面美化样式 - 大厂级设计
 * 更新时间：2025-12-03
 */

/* ============================================
   登录页面容器
   ============================================ */
.lyear-wrapper {
    position: relative;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

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

/* 背景装饰元素 */
.lyear-wrapper::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg);
    }
    33% {
        transform: translate(30px, -30px) rotate(120deg);
    }
    66% {
        transform: translate(-20px, 20px) rotate(240deg);
    }
}

.lyear-wrapper::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

/* ============================================
   登录中心区域
   ============================================ */
.lyear-login {
    display: flex !important;
    min-height: 100vh;
    align-items: center !important;
    justify-content: center !important;
    position: relative;
    z-index: 1;
    padding: 20px;
}

.login-center {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    min-width: 420px;
    max-width: 480px;
    width: 100%;
    padding: 50px 50px 40px;
    border-radius: 24px;
    margin: 30px;
    box-shadow: 
        0 20px 60px rgba(0, 0, 0, 0.3),
        0 0 0 1px rgba(255, 255, 255, 0.1) inset;
    animation: slideUpFadeIn 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    overflow: hidden;
}

.login-center::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    background-size: 200% 100%;
    animation: shimmer 3s linear infinite;
}

@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

@keyframes slideUpFadeIn {
    from {
        opacity: 0;
        transform: translateY(40px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* ============================================
   登录标题
   ============================================ */
.login-header {
    margin-bottom: 40px !important;
    text-align: center;
    position: relative;
}

.login-header::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    border-radius: 2px;
}

.login-header {
    color: #1f2937;
    font-weight: 700;
    font-size: 32px !important;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: textGradient 3s ease infinite;
    letter-spacing: -0.5px;
}

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

/* ============================================
   表单组
   ============================================ */
.login-center .form-group {
    margin-bottom: 24px;
    position: relative;
}

.login-center .has-feedback.feedback-left {
    position: relative;
}

.login-center .has-feedback.feedback-left .form-control {
    padding-left: 50px;
    padding-right: 20px;
    height: 52px;
    border-radius: 14px;
    border: 2px solid #e5e7eb;
    font-size: 15px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: #f9fafb;
    color: #1f2937;
    font-weight: 500;
}

.login-center .has-feedback.feedback-left .form-control::placeholder {
    color: #9ca3af;
    font-weight: 400;
}

.login-center .has-feedback.feedback-left .form-control:focus {
    border-color: #667eea;
    box-shadow: 
        0 0 0 4px rgba(102, 126, 234, 0.1),
        0 4px 12px rgba(102, 126, 234, 0.15);
    outline: none;
    background: #ffffff;
    transform: translateY(-1px);
}

.login-center .has-feedback.feedback-left .form-control-feedback {
    position: absolute;
    left: 0;
    right: auto;
    top: 0;
    width: 50px;
    height: 52px;
    line-height: 52px;
    z-index: 4;
    color: #9ca3af;
    font-size: 22px;
    text-align: center;
    transition: all 0.3s ease;
}

.login-center .has-feedback.feedback-left .form-control:focus + .form-control-feedback {
    color: #667eea;
    transform: scale(1.1);
}

/* ============================================
   验证码区域
   ============================================ */
.login-center .row {
    margin-left: -5px;
    margin-right: -5px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.login-center .row .col-xs-7 {
    flex: 1;
    position: relative;
}

.login-center .row .col-xs-7 .form-control {
    padding-left: 50px;
    padding-right: 15px;
    height: 52px;
    border-radius: 14px;
    border: 2px solid #e5e7eb;
    font-size: 15px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: #f9fafb;
    width: 100%;
}

.login-center .row .col-xs-7 .form-control:focus {
    border-color: #667eea;
    box-shadow: 
        0 0 0 4px rgba(102, 126, 234, 0.1),
        0 4px 12px rgba(102, 126, 234, 0.15);
    outline: none;
    background: #ffffff;
    transform: translateY(-1px);
}

.login-center .row .col-xs-7 .form-control-feedback {
    position: absolute;
    left: 5px;
    top: 0;
    width: 50px;
    height: 52px;
    line-height: 52px;
    z-index: 4;
    color: #9ca3af;
    font-size: 22px;
    text-align: center;
    transition: all 0.3s ease;
}

.login-center .row .col-xs-7 .form-control:focus + .form-control-feedback {
    color: #667eea;
    transform: scale(1.1);
}

.login-center .row .col-xs-5 {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 52px;
    flex-shrink: 0;
}

.login-center .row .col-xs-5 img {
    border-radius: 12px;
    border: 2px solid #e5e7eb;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    max-width: 100%;
    height: 48px;
    object-fit: cover;
    background: #f9fafb;
}

.login-center .row .col-xs-5 img:hover {
    border-color: #667eea;
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.2);
}

/* ============================================
   登录按钮
   ============================================ */
.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
    border: none !important;
    border-radius: 14px !important;
    height: 52px !important;
    font-size: 16px !important;
    font-weight: 600 !important;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
    box-shadow: 
        0 4px 15px rgba(102, 126, 234, 0.4),
        0 0 0 0 rgba(102, 126, 234, 0.4) !important;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-primary:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary:hover {
    transform: translateY(-2px) !important;
    box-shadow: 
        0 6px 20px rgba(102, 126, 234, 0.5),
        0 0 0 4px rgba(102, 126, 234, 0.1) !important;
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%) !important;
}

.btn-primary:active {
    transform: translateY(0) !important;
    box-shadow: 
        0 2px 10px rgba(102, 126, 234, 0.4),
        0 0 0 2px rgba(102, 126, 234, 0.1) !important;
}

.btn-primary.js-ajax-submit[data-loadingmsg]::after {
    content: '';
    display: inline-block;
    width: 16px;
    height: 16px;
    margin-left: 8px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    opacity: 0;
    transition: opacity 0.3s;
}

.btn-primary.js-ajax-submit.loading::after {
    opacity: 1;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ============================================
   页脚
   ============================================ */
.login-center hr {
    margin: 30px 0 20px;
    border: none;
    border-top: 1px solid #e5e7eb;
}

footer {
    margin-top: 0;
    padding-top: 0;
    border-top: none;
    text-align: center;
}

footer p {
    color: #6b7280;
    font-size: 13px;
    margin: 0;
    line-height: 1.8;
}

footer a {
    color: #667eea;
    text-decoration: none;
    transition: all 0.3s ease;
    font-weight: 500;
    position: relative;
}

footer a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    transition: width 0.3s ease;
}

footer a:hover {
    color: #764ba2;
}

footer a:hover::after {
    width: 100%;
}

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 576px) {
    .login-center {
        min-width: auto;
        width: 100%;
        padding: 40px 30px 30px;
        margin: 20px;
        border-radius: 20px;
    }
    
    .login-header {
        font-size: 26px !important;
        margin-bottom: 30px !important;
    }
    
    .login-center .has-feedback.feedback-left .form-control,
    .login-center .row .col-xs-7 .form-control {
        height: 48px;
        font-size: 14px;
    }
    
    .btn-primary {
        height: 48px !important;
        font-size: 15px !important;
    }
}

/* ============================================
   加载状态
   ============================================ */
.login-center.loading {
    pointer-events: none;
    opacity: 0.7;
}

.login-center.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(2px);
    z-index: 10;
}

/* ============================================
   错误提示美化
   ============================================ */
.alert {
    border-radius: 12px;
    border: none;
    padding: 12px 16px;
    margin-bottom: 20px;
    font-size: 14px;
    font-weight: 500;
    animation: shake 0.5s ease;
}

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

.alert-danger {
    background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
    color: #991b1b;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.2);
}

.alert-success {
    background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
    color: #065f46;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.2);
}