/* ==============================================
   WhatsApp重定向系统 - 登录页面样式
   文件: login.css
   作者: System Developer
   创建时间: 2025-09-17
   描述: 登录页面专用样式，包含动画效果和响应式设计
   ============================================== */

/* ==============================================
   页面布局样式
   ============================================== */
body {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    overflow: hidden;
}

/* ==============================================
   登录容器样式
   ============================================== */
.login-wrapper {
    position: relative;
    width: 100%;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-container {
    width: 100%;
    max-width: 440px;
    animation: slideDown 0.8s ease-out;
}

.login-card {
    background: var(--light);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
    max-height: 100%;
    position: relative;
}

.login-card:hover {
    box-shadow: var(--shadow-hover);
}

/* ==============================================
   登录头部样式
   ============================================== */
.login-header {
    background: var(--primary);
    padding: 28px 32px 24px;
    text-align: center;
    color: var(--light);
    position: relative;
}

.login-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-light), var(--primary));
}

.login-logo {
    font-size: 42px;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.15);
    width: 70px;
    height: 70px;
    border-radius: 50%;
    animation: pulse 2s infinite;
    margin-left: auto;
    margin-right: auto;
}

.login-header h1 {
    font-weight: 600;
    font-size: 24px;
    margin-bottom: 6px;
    letter-spacing: -0.5px;
}

.login-header p {
    font-weight: 400;
    opacity: 0.9;
    font-size: 14px;
}

/* ==============================================
   表单样式
   ============================================== */
.login-form {
    padding: 32px;
    min-height: 280px;
    display: flex;
    flex-direction: column;
}

.form-label {
    display: flex;
    align-items: center;
    color: var(--text);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
}

.form-label i {
    margin-right: 8px;
    font-size: 16px;
    color: var(--primary);
}

.input-container {
    position: relative;
    display: block;
}

.form-input {
    width: 100%;
    padding: 14px 46px 14px 16px;
    border: 2px solid var(--gray-medium);
    border-radius: var(--radius-sm);
    font-size: 16px;
    transition: var(--transition);
    background: var(--light);
    outline: none;
    line-height: 1.5;
    height: 52px;
    box-sizing: border-box;
    font-weight: 400;
}

.form-input:focus {
    border-color: var(--primary);
    background: var(--light);
    box-shadow: 0 0 0 3px rgba(18, 140, 126, 0.15);
}

.form-input-icon {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-dark);
    font-size: 16px;
    pointer-events: none;
    z-index: 2;
    transition: var(--transition);
}

.form-input:focus + .form-input-icon {
    color: var(--primary);
}

/* ==============================================
   按钮样式扩展
   ============================================== */
.btn-primary {
    width: 100%;
    position: relative;
    overflow: hidden;
    height: 52px;
}

.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: var(--transition);
}

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

/* ==============================================
   页脚样式
   ============================================== */
.login-footer {
    text-align: center;
    margin-top: 24px;
    color: var(--text-light);
    font-size: 14px;
    padding-top: 20px;
    border-top: 1px solid var(--gray);
}

.login-footer a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
}

.login-footer a i {
    margin-right: 6px;
}

.login-footer a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* ==============================================
   提示消息样式
   ============================================== */
.alert {
    opacity: 0;
    transform: translateY(-10px);
    transition: all 0.5s ease;
    max-height: 0;
    overflow: hidden;
    min-height: 0;
    margin-bottom: 0;
}

.alert.show {
    opacity: 1;
    transform: translateY(0);
    max-height: 100px;
    min-height: auto;
    margin-bottom: 20px;
}

.alert.hide {
    opacity: 0;
    transform: translateY(-10px);
    max-height: 0;
    margin-bottom: 0;
    min-height: 0;
}

/* ==============================================
   成功提示弹窗
   ============================================== */
.success-toast {
    position: fixed;
    top: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(-100px);
    background: var(--success);
    color: var(--light);
    padding: 14px 24px;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 1000;
    opacity: 0;
    transition: all 0.5s cubic-bezier(0.68, -0.55, 0.27, 1.55);
    font-size: 15px;
    font-weight: 500;
}

.success-toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.success-toast.hide {
    opacity: 0;
    transform: translateX(-50%) translateY(-100px);
}

/* ==============================================
   装饰元素
   ============================================== */
.decoration {
    position: fixed;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    z-index: -1;
}

.decoration-1 {
    width: 200px;
    height: 200px;
    top: -80px;
    right: -80px;
}

.decoration-2 {
    width: 300px;
    height: 300px;
    bottom: -120px;
    left: -120px;
}

.decoration-3 {
    width: 150px;
    height: 150px;
    top: 50%;
    right: 30%;
    opacity: 0.7;
}

/* ==============================================
   动画效果
   ============================================== */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* ==============================================
   响应式设计
   ============================================== */
@media (max-width: 480px) {
    .login-form {
        padding: 24px;
        min-height: 260px;
    }
    
    .login-header {
        padding: 24px 20px 20px;
    }
    
    .login-header h1 {
        font-size: 22px;
    }
    
    .login-logo {
        font-size: 36px;
        width: 60px;
        height: 60px;
    }
    
    body {
        padding: 16px;
    }
    
    .login-wrapper {
        padding: 16px;
        height: auto;
        min-height: 100vh;
    }
    
    .form-group {
        margin-bottom: 18px;
    }
    
    .login-container {
        max-width: 100%;
    }
    
    .form-input {
        font-size: 16px; /* 防止iOS缩放 */
    }
}

@media (max-width: 320px) {
    .login-header {
        padding: 20px 16px 16px;
    }
    
    .login-form {
        padding: 20px;
    }
    
    .login-header h1 {
        font-size: 20px;
    }
    
    .login-logo {
        font-size: 32px;
        width: 55px;
        height: 55px;
    }
}

/* ==============================================
   深色模式支持（可选）
   ============================================== */
@media (prefers-color-scheme: dark) {
    /* 根据需要添加深色模式样式 */
}

/* ==============================================
   高对比度模式支持
   ============================================== */
@media (prefers-contrast: high) {
    .form-input {
        border-width: 3px;
    }
    
    .btn-primary {
        border: 2px solid var(--primary-dark);
    }
}

/* ==============================================
   减少动画模式支持
   ============================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}