/* ============================================
   TaskManager User Guide - Shared Styles
   ============================================
   Design Standards Compliant
   - Uses CSS variables (--theme-*)
   - Dark mode support
   - Component-prefixed class names
   - Max-width: 800px for reading content
   ============================================ */

/* ========== CSS Variables (Design Standards) ========== */
:root {
  /* Text Colors */
  --theme-text-primary: #1f2937;
  --theme-text-secondary: #6b7280;
  --theme-text-tertiary: #9ca3af;

  /* Background Colors */
  --theme-bg-primary: #ffffff;
  --theme-bg-secondary: #f9fafb;
  --theme-bg-tertiary: #f3f4f6;

  /* Border Colors */
  --theme-border-light: #e5e7eb;
  --theme-border-medium: #d1d5db;

  /* Action Colors */
  --theme-primary: #2196f3;
  --theme-primary-hover: #1976d2;
  --theme-success: #4caf50;
  --theme-error: #f44336;
  --theme-warning: #ff9800;

  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-base: 8px;
  --radius-lg: 12px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

/* ========== Dark Mode ========== */
[data-theme="dark"] {
  --theme-text-primary: #f9fafb;
  --theme-text-secondary: #d1d5db;
  --theme-text-tertiary: #9ca3af;

  --theme-bg-primary: #111827;
  --theme-bg-secondary: #1f2937;
  --theme-bg-tertiary: #374151;

  --theme-border-light: #374151;
  --theme-border-medium: #4b5563;

  --theme-primary: #60a5fa;
  --theme-primary-hover: #3b82f6;
  --theme-success: #4ade80;
  --theme-error: #f87171;
  --theme-warning: #fbbf24;
}

/* ========== Base Styles ========== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
  line-height: 1.6;
  color: var(--theme-text-primary);
  background-color: var(--theme-bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ========== Layout ========== */
.guide-container {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--spacing-lg);
  min-height: 100vh;
}

.guide-header {
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 2px solid var(--theme-border-light);
}

.guide-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--theme-text-primary);
  margin-bottom: var(--spacing-sm);
}

.guide-subtitle {
  font-size: 18px;
  color: var(--theme-text-secondary);
  font-weight: 400;
}

/* ========== Navigation ========== */
.guide-nav {
  background-color: var(--theme-bg-secondary);
  border: 1px solid var(--theme-border-light);
  border-radius: var(--radius-base);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.guide-nav-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--theme-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--spacing-sm);
}

.guide-nav-links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.guide-nav-links li {
  display: inline-block;
}

.guide-nav-link {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--theme-bg-primary);
  border: 1px solid var(--theme-border-light);
  border-radius: var(--radius-sm);
  color: var(--theme-primary);
  text-decoration: none;
  font-size: 14px;
  transition: all 0.2s ease;
}

.guide-nav-link:hover {
  background-color: var(--theme-primary);
  color: white;
  border-color: var(--theme-primary);
}

/* ========== Content Sections ========== */
.guide-section {
  margin-bottom: var(--spacing-xl);
}

.guide-section-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--theme-text-primary);
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 1px solid var(--theme-border-light);
}

.guide-section-description {
  color: var(--theme-text-secondary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.7;
}

/* ========== Cards ========== */
.guide-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.guide-card {
  background-color: var(--theme-bg-secondary);
  border: 1px solid var(--theme-border-light);
  border-radius: var(--radius-base);
  padding: var(--spacing-lg);
  transition: all 0.2s ease;
}

.guide-card:hover {
  border-color: var(--theme-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.guide-card-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--theme-text-primary);
  margin-bottom: var(--spacing-sm);
}

.guide-card-description {
  font-size: 14px;
  color: var(--theme-text-secondary);
  margin-bottom: var(--spacing-md);
  line-height: 1.6;
}

.guide-card-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--theme-primary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s ease;
}

.guide-card-link:hover {
  color: var(--theme-primary-hover);
}

.guide-card-link::after {
  content: '→';
  font-size: 16px;
}

/* ========== Content Elements ========== */
.guide-content h2 {
  font-size: 20px;
  font-weight: 600;
  color: var(--theme-text-primary);
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
}

.guide-content h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--theme-text-primary);
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
}

.guide-content p {
  color: var(--theme-text-primary);
  margin-bottom: var(--spacing-md);
  line-height: 1.7;
}

.guide-content ul,
.guide-content ol {
  margin-left: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  color: var(--theme-text-primary);
}

.guide-content li {
  margin-bottom: var(--spacing-sm);
  line-height: 1.6;
}

.guide-content strong {
  font-weight: 600;
  color: var(--theme-text-primary);
}

.guide-content code {
  background-color: var(--theme-bg-tertiary);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-family: 'Courier New', monospace;
  font-size: 14px;
  color: var(--theme-text-primary);
}

/* ========== Info Boxes ========== */
.guide-info-box {
  background-color: var(--theme-bg-secondary);
  border-left: 4px solid var(--theme-primary);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  border-radius: var(--radius-sm);
}

.guide-info-box.success {
  border-left-color: var(--theme-success);
}

.guide-info-box.warning {
  border-left-color: var(--theme-warning);
}

.guide-info-box.error {
  border-left-color: var(--theme-error);
}

.guide-info-box-title {
  font-weight: 600;
  color: var(--theme-text-primary);
  margin-bottom: var(--spacing-xs);
}

.guide-info-box-content {
  color: var(--theme-text-secondary);
  font-size: 14px;
}

/* ========== Steps/Instructions ========== */
.guide-steps {
  counter-reset: step-counter;
  list-style: none;
  margin-left: 0;
}

.guide-step {
  counter-increment: step-counter;
  margin-bottom: var(--spacing-lg);
  padding-left: 40px;
  position: relative;
}

.guide-step::before {
  content: counter(step-counter);
  position: absolute;
  left: 0;
  top: 0;
  width: 28px;
  height: 28px;
  background-color: var(--theme-primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 14px;
}

.guide-step-title {
  font-weight: 600;
  color: var(--theme-text-primary);
  margin-bottom: var(--spacing-xs);
}

.guide-step-description {
  color: var(--theme-text-secondary);
  line-height: 1.6;
}

/* ========== Footer ========== */
.guide-footer {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--theme-border-light);
  text-align: center;
}

.guide-footer-link {
  color: var(--theme-primary);
  text-decoration: none;
  font-weight: 500;
}

.guide-footer-link:hover {
  color: var(--theme-primary-hover);
  text-decoration: underline;
}

/* ========== Dark Mode Toggle ========== */
.guide-theme-toggle {
  position: fixed;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--theme-bg-secondary);
  border: 1px solid var(--theme-border-light);
  border-radius: var(--radius-base);
  color: var(--theme-text-primary);
  cursor: pointer;
  font-size: 14px;
  transition: all 0.2s ease;
  z-index: 1000;
}

.guide-theme-toggle:hover {
  background-color: var(--theme-bg-tertiary);
}

/* ========== Responsive ========== */
@media (max-width: 768px) {
  .guide-container {
    padding: var(--spacing-md);
  }

  .guide-title {
    font-size: 28px;
  }

  .guide-card-grid {
    grid-template-columns: 1fr;
  }

  .guide-theme-toggle {
    top: var(--spacing-sm);
    right: var(--spacing-sm);
  }
}

/* ========== Print Styles ========== */
@media print {
  .guide-theme-toggle,
  .guide-nav {
    display: none;
  }

  body {
    color: #000;
    background: #fff;
  }

  .guide-card {
    break-inside: avoid;
  }
}