/**
 * Tailwind Base CSS
 * Core Tailwind CSS configuration for the Cyber Workforce Coalition website
 * Based on Meta design system principles
 * 兼容Tailwind CDN方式，不使用@tailwind指令
 */

/* Meta-inspired Design System Variables */
:root {
  /* Primary Colors */
  --color-primary: #1877F2;      /* Meta Blue */
  --color-primary-dark: #166FE5;
  --color-primary-light: #4293FB;
  
  /* Secondary Colors */
  --color-secondary: #42B72A;    /* Meta Green */
  --color-secondary-dark: #36A420;
  --color-secondary-light: #5AC53B;
  
  /* Accent Colors */
  --color-accent: #0866FF;       /* Meta Accent Blue */
  --color-accent-dark: #0756D6;
  --color-accent-light: #3B82F6;
  
  /* Neutral Colors */
  --color-gray-50: #F5F6F7;
  --color-gray-100: #EBEDF0;
  --color-gray-200: #E4E6EB;
  --color-gray-300: #CCD0D5;
  --color-gray-400: #BEC3C9;
  --color-gray-500: #8D949E;
  --color-gray-600: #606770;
  --color-gray-700: #444950;
  --color-gray-800: #2A2F35;
  --color-gray-900: #1C1E21;
  
  /* Feedback Colors */
  --color-success: #42B72A;
  --color-warning: #F7B928;
  --color-danger: #FA383E;
  --color-info: #1877F2;
  
  /* Font Settings */
  --font-family-base: 'Optimistic Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-family-heading: 'Optimistic Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

/* Base Typography */
@layer base {
  html {
    font-family: var(--font-family-base);
    color: var(--color-gray-900);
    line-height: 1.5;
  }
  
  h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-heading);
    font-weight: 600;
    line-height: 1.2;
  }
  
  h1 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
  }
  
  h2 {
    font-size: 2rem;
    margin-bottom: 1.25rem;
  }
  
  h3 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
  }
  
  h4 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
  }
  
  h5 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
  }
  
  h6 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
  }
  
  a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s ease;
  }
  
  a:hover {
    color: var(--color-primary-dark);
  }
}

/* Component Classes - 兼容Tailwind CDN方式 */
/* 不使用@layer和@apply指令，直接使用CSS类 */

/* 按钮基础样式 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1rem;
  border-radius: 0.375rem;
  font-weight: 500;
  font-size: 0.875rem;
  transition-property: all;
  transition-duration: 200ms;
  transition-timing-function: ease-in-out;
}

/* 主要按钮 */
.btn-primary {
  background-color: var(--color-primary);
  color: white;
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
}

/* 次要按钮 */
.btn-secondary {
  background-color: var(--color-secondary);
  color: white;
}

.btn-secondary:hover {
  background-color: var(--color-secondary-dark);
}

/* 轮廓按钮 */
.btn-outline {
  border: 1px solid var(--color-gray-300);
  background-color: white;
  color: var(--color-gray-700);
}

.btn-outline:hover {
  background-color: var(--color-gray-100);
}

/* 卡片组件 */
.card {
  background-color: white;
  border-radius: 0.5rem;
  box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  border: 1px solid var(--color-gray-200);
  overflow: hidden;
}

.card-header {
  padding: 1rem;
  border-bottom: 1px solid var(--color-gray-200);
}

.card-body {
  padding: 1rem;
}

.card-footer {
  padding: 1rem;
  border-top: 1px solid var(--color-gray-200);
}

/* 表单元素 */
.form-input {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--color-gray-300);
  border-radius: 0.375rem;
}

.form-input:focus {
  outline: none;
  box-shadow: 0 0 0 2px var(--color-primary);
  border-color: transparent;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-gray-700);
  margin-bottom: 0.25rem;
}

/* 容器 */
.container {
  margin-left: auto;
  margin-right: auto;
  padding-left: 1rem;
  padding-right: 1rem;
  max-width: 80rem;
}

@media (min-width: 640px) {
  .container {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }
}

@media (min-width: 1024px) {
  .container {
    padding-left: 2rem;
    padding-right: 2rem;
  }
}

/* Utility Classes - 不使用@layer指令 */
.text-shadow {
  text-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

.text-shadow-md {
  text-shadow: 0 2px 4px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.08);
}

.text-shadow-lg {
  text-shadow: 0 10px 15px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);
}

.gradient-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
}

/* Fix for WordPress Admin */
.wp-admin .tailwind-preflight-reset {
  all: revert;
}