/* ============================================
   Design Tokens - ICT 培训中心
   品牌色：蓝色主调 + 橙色辅助
   ============================================ */

:root {
  /* --- Primary Blue (主色调) --- */
  --primary-color: #0088cc;
  --primary-dark: #006699;
  --primary-darker: #004d73;
  --primary-light: #33aaff;
  --primary-lighter: #b3e0f5;
  --primary-50: #e6f5fb;
  --primary-100: #ccebf7;
  --primary-200: #99d7ef;
  --primary-300: #66c3e7;
  --primary-400: #33afdf;
  --primary-500: #0088cc;
  --primary-600: #006da3;
  --primary-700: #00527a;
  --primary-800: #003752;
  --primary-900: #001c29;

  /* --- Accent Orange (辅助色) --- */
  --accent-color: #ff8c00;
  --accent-dark: #e67300;
  --accent-light: #ffaa33;
  --accent-lighter: #ffcc80;
  --accent-50: #fff5e6;
  --accent-100: #ffeacc;
  --accent-500: #ff8c00;
  --accent-600: #e67300;
  --accent-700: #cc5f00;

  /* --- Secondary --- */
  --secondary-color: #10b981;
  --secondary-dark: #059669;
  --secondary-light: #34d399;

  /* --- Danger / Error --- */
  --danger-color: #dc3545;
  --danger-dark: #c82333;
  --danger-light: #e5535f;

  /* --- Warning --- */
  --warning-color: #ffc107;
  --warning-dark: #d39e00;
  --warning-light: #ffd54f;

  /* --- Neutral / Text --- */
  --text-color: #111827;
  --text-primary: #111827;
  --text-secondary: #4b5563;
  --text-light: #6b7280;
  --text-muted: #9ca3af;
  --text-inverse: #ffffff;

  /* --- Background --- */
  --bg-color: #ffffff;
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-dark: #2d3748;
  --bg-dark-card: #374151;

  /* --- Card --- */
  --card-bg: #ffffff;
  --card-alt-bg: #f8fafc;
  --card-hover-bg: #f1f5f9;

  /* --- Border --- */
  --border-color: #e5e7eb;
  --border-light: #f3f4f6;
  --border-dark: #d1d5db;
  --divider-color: #f3f4f6;

  /* --- Shadows --- */
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 6px 18px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.08);
  --shadow-xl: 0 20px 48px rgba(0, 0, 0, 0.1);
  --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.08);
  --shadow-primary: 0 6px 16px rgba(0, 136, 204, 0.28);
  --shadow-accent: 0 6px 16px rgba(255, 140, 0, 0.28);

  /* --- Radius --- */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

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

  /* --- Typography --- */
  --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-family-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;

  /* --- Layout --- */
  --navbar-height: 64px;
  --sidebar-width: 220px;
  --header-height: 60px;
  --content-max-width: 1200px;

  /* --- Z-Index --- */
  --z-dropdown: 100;
  --z-navbar: 1000;
  --z-sidebar: 1001;
  --z-modal: 1050;
  --z-tooltip: 1070;

  /* --- Transitions --- */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* --- Forms --- */
  --form-control-height: 3rem;
  --form-control-padding: 0.75rem 1rem;
  --form-control-border-radius: var(--radius-lg);
  --form-control-focus-ring: 0 0 0 0.25rem rgba(0, 136, 204, 0.2);
  --form-label-weight: 600;

  /* --- Buttons --- */
  --btn-padding-sm: 0.5rem 1rem;
  --btn-padding-base: 0.75rem 1.75rem;
  --btn-padding-lg: 1rem 2.25rem;
  --btn-border-radius: var(--radius-lg);
}