/**
 * 绿邮Y系列开发板管理平台 - 登录页面样式
 * 现代化Material Design风格，与主体系统保持一致
 * 适用于生产环境的专业级界面设计
 */

/* ===== CSS变量定义 ===== */
:root {
  /* 间距系统 */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  
  /* 圆角系统 */
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
  --border-radius-xl: 16px;
  
  /* 过渡动画 */
  --transition-fast: 0.15s ease-out;
  --transition-standard: 0.3s ease-out;
  --transition-slow: 0.5s ease-out;
  
  /* 阴影系统 */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.16);
  
  /* 主要颜色变量 */
  --primary-main: #49af8b;
  --primary-dark: #3a8b6b;
  --primary-light: #6bbf9a;
  
  /* 登录页面专用颜色 */
  --login-bg-primary: #49af8b;
  --login-bg-secondary: #49af8b;
  --login-overlay: rgba(255, 255, 255, 0.1);
  --login-card-bg: rgba(255, 255, 255, 0.98);
  --login-input-bg: rgba(255, 255, 255, 0.9);
}

/* ===== 全局重置和基础样式 ===== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

.login-body {
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  background: var(--login-bg-primary);
  background-attachment: fixed;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: var(--spacing-md);
}

/* ===== 背景装饰元素 ===== */
.login-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  overflow: hidden;
}

.background-shape {
  position: absolute;
  border-radius: 50%;
  background: var(--login-overlay);
  animation: float 20s ease-in-out infinite;
}

.background-shape.shape-1 {
  width: 300px;
  height: 300px;
  top: -150px;
  left: -150px;
  animation-delay: 0s;
}

.background-shape.shape-2 {
  width: 200px;
  height: 200px;
  top: 20%;
  right: -100px;
  animation-delay: -7s;
}

.background-shape.shape-3 {
  width: 150px;
  height: 150px;
  bottom: 10%;
  left: 10%;
  animation-delay: -14s;
}

.background-particles {
  position: absolute;
  width: 100%;
  height: 100%;
  background-image: 
    radial-gradient(circle at 25% 25%, rgba(255, 255, 255, 0.1) 1px, transparent 1px),
    radial-gradient(circle at 75% 75%, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 50px 50px, 80px 80px;
  animation: particles 30s linear infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); opacity: 0.3; }
  25% { transform: translateY(-20px) rotate(90deg); opacity: 0.5; }
  50% { transform: translateY(-10px) rotate(180deg); opacity: 0.3; }
  75% { transform: translateY(-30px) rotate(270deg); opacity: 0.6; }
}

@keyframes particles {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50px); }
}

/* ===== 登录容器 ===== */
.login-container {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 440px;
  animation: slideInUp var(--transition-slow);
}

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



/* ===== 登录卡片 ===== */
.login-card {
  background: var(--login-card-bg);
  backdrop-filter: blur(20px);
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-xl);
  border: 1px solid rgba(255, 255, 255, 0.2);
  overflow: hidden;
  transition: all var(--transition-standard);
}

.login-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
}

.card-header {
  padding: var(--spacing-xl) var(--spacing-xl) var(--spacing-lg);
  text-align: center;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.card-header h2 {
  font-size: 24px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.card-header p {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 0;
}

/* ===== 表单样式 ===== */
.login-form {
  padding: var(--spacing-xl);
}

.form-fields {
  margin-bottom: var(--spacing-xl);
}

.form-field {
  margin-bottom: var(--spacing-lg);
}

.form-field:last-child {
  margin-bottom: 0;
}

.field-label {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
}

.label-required {
  color: var(--error-main);
  font-weight: 600;
}

.input-container {
  position: relative;
  display: flex;
  align-items: center;
}

.input-icon {
  position: absolute;
  left: var(--spacing-md);
  color: var(--text-secondary);
  z-index: 2;
  transition: color var(--transition-fast);
}

.form-input {
  width: 100%;
  height: 48px;
  padding: 0 var(--spacing-md) 0 48px;
  font-size: 16px;
  line-height: 1.5;
  color: var(--text-primary);
  background: var(--login-input-bg);
  border: 2px solid rgba(0, 0, 0, 0.08);
  border-radius: var(--border-radius-md);
  transition: all var(--transition-fast);
  outline: none;
}

.form-input:focus {
  border-color: var(--primary-main);
  background: white;
  box-shadow: 0 0 0 3px rgba(73, 175, 139, 0.1);
}

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

.form-input::placeholder {
  color: var(--text-disabled);
}

.password-toggle {
  position: absolute;
  right: var(--spacing-md);
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: var(--spacing-xs);
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
  z-index: 2;
}

.password-toggle:hover {
  color: var(--primary-main);
  background: rgba(73, 175, 139, 0.1);
}

/* ===== 复选框样式 ===== */
.checkbox-field {
  margin-top: var(--spacing-lg);
}

.checkbox-container {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  user-select: none;
  padding: var(--spacing-sm) 0;
}

.checkbox-container input[type="checkbox"] {
  display: none;
}

.checkbox-mark {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(0, 0, 0, 0.2);
  border-radius: var(--border-radius-sm);
  background: white;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  position: relative;
}

.checkbox-container input[type="checkbox"]:checked + .checkbox-mark {
  background: var(--primary-main);
  border-color: var(--primary-main);
}

.checkbox-container input[type="checkbox"]:checked + .checkbox-mark::after {
  content: '';
  width: 6px;
  height: 10px;
  border: 2px solid white;
  border-top: none;
  border-left: none;
  transform: rotate(45deg);
  margin-top: -2px;
}

.checkbox-label {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.4;
}

.checkbox-container:hover .checkbox-mark {
  border-color: var(--primary-main);
  box-shadow: 0 0 0 3px rgba(73, 175, 139, 0.1);
}

/* ===== 登录按钮 ===== */
.form-actions {
  margin-bottom: var(--spacing-lg);
}

.login-button {
  width: 100%;
  height: 52px;
  background: linear-gradient(135deg, var(--primary-main) 0%, var(--primary-dark) 100%);
  border: none;
  border-radius: var(--border-radius-md);
  color: white;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.login-button::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 0.6s ease;
}

.login-button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

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

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

.login-button:disabled {
  background: var(--text-disabled);
  cursor: not-allowed;
  transform: none;
  box-shadow: var(--shadow-sm);
}

.button-content {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
}

.button-text {
  transition: opacity var(--transition-fast);
}

.login-button:disabled .button-text {
  opacity: 0.7;
}

.button-spinner {
  display: none;
}

.login-button.loading .button-text {
  opacity: 0;
}

.login-button.loading .button-spinner {
  display: block;
}

.spinner-ring {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top: 2px solid white;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* ===== 帮助信息 ===== */
.form-footer {
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(0, 0, 0, 0.05);
}

.help-text {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.help-text svg {
  flex-shrink: 0;
  margin-top: 2px;
  opacity: 0.7;
}

/* ===== 系统信息 ===== */
.system-info {
  text-align: center;
  margin-top: var(--spacing-xl);
  color: rgba(255, 255, 255, 0.8);
}

.version-info {
  font-size: 12px;
  font-weight: 300;
  letter-spacing: 0.5px;
}

.separator {
  margin: 0 var(--spacing-sm);
  opacity: 0.6;
}

/* ===== 消息提示组件 ===== */
.message-container {
  position: fixed;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  z-index: 1000;
  pointer-events: none;
}

.message-toast {
  background: white;
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-lg);
  border-left: 4px solid;
  margin-bottom: var(--spacing-sm);
  max-width: 400px;
  opacity: 0;
  transform: translateX(100%);
  transition: all var(--transition-standard);
  pointer-events: auto;
}

.message-toast.show {
  opacity: 1;
  transform: translateX(0);
}

.message-toast.message-error {
  border-left-color: var(--error-main);
}

.message-toast.message-success {
  border-left-color: var(--success-main);
}

.message-content {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
}

.message-icon {
  flex-shrink: 0;
}

.message-toast.message-error .message-icon {
  color: var(--error-main);
}

.message-toast.message-success .message-icon {
  color: var(--success-main);
}

.message-text {
  flex: 1;
  font-size: 14px;
  color: var(--text-primary);
  line-height: 1.4;
}

.message-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: var(--spacing-xs);
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.message-close:hover {
  background: rgba(0, 0, 0, 0.05);
  color: var(--text-primary);
}

/* ===== 响应式设计 ===== */
@media (max-width: 768px) {
  .login-body {
    padding: var(--spacing-sm);
  }
  
  .login-container {
    max-width: 100%;
  }
  

  
  .card-header {
    padding: var(--spacing-lg);
  }
  
  .login-form {
    padding: var(--spacing-lg);
  }
  
  .message-container {
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    left: var(--spacing-sm);
  }
  
  .message-toast {
    max-width: none;
  }
}

@media (max-width: 480px) {
  .card-header h2 {
    font-size: 20px;
  }
  
  .form-input {
    height: 44px;
    font-size: 16px; /* 防止iOS缩放 */
  }
  
  .login-button {
    height: 48px;
  }
}

/* ===== 可访问性增强 ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media (prefers-contrast: high) {
  .login-card {
    border: 2px solid var(--text-primary);
  }
  
  .form-input {
    border-width: 2px;
  }
  
  .login-button {
    border: 2px solid var(--primary-dark);
  }
}

/* ===== 深色模式支持 ===== */
@media (prefers-color-scheme: dark) {
  :root {
    --login-card-bg: rgba(30, 30, 30, 0.95);
    --login-input-bg: rgba(40, 40, 40, 0.9);
  }
  
  .card-header h2,
  .field-label,
  .form-input,
  .checkbox-label,
  .help-text,
  .message-text {
    color: #e0e0e0;
  }
  
  .form-input {
    background: var(--login-input-bg);
    border-color: rgba(255, 255, 255, 0.1);
  }
  
  .form-input:focus {
    background: rgba(50, 50, 50, 0.9);
  }
  
  .checkbox-mark {
    background: rgba(50, 50, 50, 0.9);
    border-color: rgba(255, 255, 255, 0.2);
  }
  
  .message-toast {
    background: #2d2d2d;
    color: #e0e0e0;
  }
}