/* Linear Design System - 企业AI成长地图 */

/* === 基础变量定义 === */
:root {
  /* 底色层（环境色） - 极深黑系 */
  --bg-primary: #161618;
  --bg-secondary: #1A1A1C;
  --bg-tertiary: #202022;
  --bg-overlay: rgba(22, 22, 24, 0.95);
  --bg-card: rgba(32, 32, 34, 0.7);
  --bg-input: rgba(26, 26, 28, 0.8);

  /* 数据层（核心信息色） - 鲜艳蓝色系 */
  --primary-cyan: #0131FF;
  --primary-blue: #0131FF;
  --primary-green: #22C55E;
  --accent-cyan: #2D4CFF;
  --accent-blue: #0131FF;
  --accent-green: #10B981;

  /* 辅助层（功能语义色） - 纯白文字系 */
  --text-primary: #FFFFFF;
  --text-secondary: #E5E5E5;
  --text-muted: #999999;
  --text-dim: #666666;

  /* 边框和分割线 - 极细极淡 */
  --border-primary: rgba(255, 255, 255, 0.08);
  --border-secondary: rgba(255, 255, 255, 0.05);
  --border-accent: rgba(1, 49, 255, 0.3);

  /* 功能警示色 */
  --success: #10B981;
  --warning: #F59E0B;
  --error: #EF4444;
  --info: #0131FF;

  /* 渐变色 - 鲜艳蓝色系 */
  --gradient-primary: linear-gradient(135deg, #0131FF 0%, #2D4CFF 100%);
  --gradient-secondary: linear-gradient(135deg, #202022 0%, #161618 100%);
  --gradient-accent: linear-gradient(135deg, rgba(1, 49, 255, 0.2) 0%, rgba(45, 76, 255, 0.1) 100%);
  --gradient-glow: radial-gradient(circle at center, rgba(1, 49, 255, 0.15) 0%, transparent 70%);

  /* 阴影系统 - 深邃带蓝色光晕 */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.5);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.6);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.7);
  --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.8);
  --shadow-glow: 0 0 40px rgba(1, 49, 255, 0.4);
  --shadow-glow-lg: 0 0 60px rgba(1, 49, 255, 0.5);

  /* 模糊效果 */
  --blur-sm: blur(4px);
  --blur-md: blur(8px);
  --blur-lg: blur(16px);
  --blur-xl: blur(24px);

  /* 动画参数 */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

  /* 字体 */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'SF Mono', Monaco, 'Inconsolata', 'Roboto Mono', monospace;

  /* 间距 */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-2xl: 32px;

  /* 字体大小 */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
}

/* === 基础重置 === */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: #161618;
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  position: relative;
}

/* === 毛玻璃效果 === */
.glass-morphism {
  background: rgba(32, 32, 34, 0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.glass-morphism-lg {
  background: rgba(32, 32, 34, 0.8);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
}

/* === 动态背景 === */
.dynamic-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  overflow: hidden;
}

.color-blends-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

#colorBlendsCanvas {
  width: 100%;
  height: 100%;
  opacity: 0.15;
}

.noise-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    repeating-linear-gradient(45deg, transparent, transparent 2px, rgba(255, 255, 255, 0.03) 2px, rgba(255, 255, 255, 0.03) 4px);
  opacity: 0.5;
  pointer-events: none;
}

/* Grid overlay removed as per user request - 网格背景已移除 */
/* .grid-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    linear-gradient(rgba(0, 191, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 191, 255, 0.08) 1px, transparent 1px);
  background-size: 50px 50px;
  opacity: 0.2;
  pointer-events: none;
} */

/* === 应用容器 === */
.app-container {
  min-height: 100vh;
  position: relative;
  display: flex;
  flex-direction: column;
}

/* === 页面系统 === */
.page {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-normal);
}

.page.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* === 表单组件 === */
.form-group {
  position: relative;
  margin-bottom: var(--space-lg);
}

.form-group label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  background: var(--bg-input);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: var(--text-base);
  transition: all var(--transition-fast);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--primary-cyan);
  box-shadow: 0 0 0 3px rgba(0, 255, 255, 0.1);
}

.form-group .input-glow {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: var(--radius-md);
  opacity: 0;
  background: linear-gradient(135deg, rgba(0, 255, 255, 0.2), rgba(0, 191, 255, 0.1));
  transition: opacity var(--transition-fast);
  pointer-events: none;
}

.form-group input:focus ~ .input-glow {
  opacity: 1;
}

.form-hint {
  font-size: var(--text-xs);
  color: var(--text-muted);
  margin-top: var(--space-xs);
  font-style: italic;
}

/* === 按钮系统 === */
.primary-btn,
.secondary-btn {
  position: relative;
  width: 100%;
  padding: var(--space-md) var(--space-xl);
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-normal);
  overflow: hidden;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.primary-btn {
  background: var(--gradient-primary);
  color: var(--bg-primary);
  box-shadow: var(--shadow-md);
}

.primary-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.secondary-btn {
  background: transparent;
  color: var(--primary-cyan);
  border: 2px solid var(--primary-cyan);
}

.secondary-btn:hover {
  background: rgba(0, 255, 255, 0.1);
  transform: translateY(-2px);
}

.btn-glow {
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.3) 0%, transparent 70%);
  opacity: 0;
  transition: opacity var(--transition-normal);
  pointer-events: none;
}

.btn:hover .btn-glow {
  opacity: 1;
}

.btn-loading {
  display: flex;
  align-items: center;
  justify-content: center;
}

.loading-spinner {
  width: 20px;
  height: 20px;
  border: 2px solid transparent;
  border-top: 2px solid var(--primary-cyan);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* === 复选框 === */
.checkbox-container {
  display: flex;
  align-items: flex-start;
  cursor: pointer;
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

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

.checkmark {
  position: relative;
  min-width: 20px;
  height: 20px;
  border: 2px solid var(--border-primary);
  border-radius: var(--radius-sm);
  margin-right: var(--space-md);
  background: var(--bg-input);
  transition: all var(--transition-fast);
}

.checkbox-container input[type="checkbox"]:checked ~ .checkmark {
  background: var(--primary-cyan);
  border-color: var(--primary-cyan);
}

.checkbox-container input[type="checkbox"]:checked ~ .checkmark::after {
  content: '✓';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: var(--bg-primary);
  font-weight: bold;
  font-size: var(--text-sm);
}

.agreement-link {
  color: var(--primary-cyan);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-fast);
}

.agreement-link:hover {
  border-bottom-color: var(--primary-cyan);
}

/* === 提示框 === */
.toast-container {
  position: fixed;
  top: var(--space-xl);
  right: var(--space-xl);
  z-index: 1000;
}

.toast {
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--primary-cyan);
  box-shadow: var(--shadow-lg);
  transform: translateX(100%);
  transition: transform var(--transition-normal);
  max-width: 300px;
}

.toast.show {
  transform: translateX(0);
}

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

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

.toast.warning {
  border-left-color: var(--warning);
}

/* === 遮罩层 === */
.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: var(--blur-sm);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.overlay.show {
  opacity: 1;
  visibility: visible;
}

/* === 响应式设计 === */
@media (max-width: 768px) {
  :root {
    --space-xs: 0.2rem;
    --space-sm: 0.4rem;
    --space-md: 0.8rem;
    --space-lg: 1.2rem;
    --space-xl: 1.6rem;
    --space-2xl: 2.4rem;
    --space-3xl: 3.2rem;
  }

  .page {
    padding: var(--space-md);
  }

  .toast-container {
    top: var(--space-md);
    right: var(--space-md);
    left: var(--space-md);
  }

  .toast {
    max-width: none;
  }
}

/* ===== Global Toast (top-right) ===== */
#toast {
  position: fixed;
  top: var(--space-xl);
  right: var(--space-xl);
  min-width: 280px;
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  background: rgba(18, 19, 24, 0.94);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: #f5f6f7;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
  transform: translateX(320px);
  opacity: 0;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 9999;
}

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

#toast.toast-success { border-left: 4px solid #13c296; }
#toast.toast-error { border-left: 4px solid #f87171; }
#toast.toast-warning { border-left: 4px solid #fbbf24; }
#toast.toast-info { border-left: 4px solid #60a5fa; }

/* === 滚动条样式 === */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--border-secondary);
  border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* === 选择文本样式 === */
::selection {
  background: rgba(0, 255, 255, 0.3);
  color: var(--text-primary);
}

::-moz-selection {
  background: rgba(0, 255, 255, 0.3);
  color: var(--text-primary);
}

/* === 焦点样式 === */
:focus-visible {
  outline: 2px solid var(--primary-cyan);
  outline-offset: 2px;
}