/* ===================================
   Mountain Equipment Checklist App
   Premium Design System
   =================================== */

/* CSS Variables */
:root {
  /* Colors - Premium Palette */
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --success-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --warning-gradient: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
  --danger-gradient: linear-gradient(135deg, #ff6b6b 0%, #ee5a6f 100%);

  --primary-color: #667eea;
  --primary-dark: #5568d3;
  --secondary-color: #764ba2;
  --accent-color: #f5576c;

  --text-primary: #2d3748;
  --text-secondary: #4a5568;
  --text-muted: #718096;
  --text-light: #a0aec0;

  --bg-primary: #ffffff;
  --bg-secondary: #f7fafc;
  --bg-accent: #edf2f7;

  --border-color: #e2e8f0;
  --border-light: #f0f4f8;

  /* Badge Colors - Updated to match requirements */
  --badge-essential: #e74c3c;
  /* Red for 必須 */
  --badge-optional: #3498db;
  /* Blue for 任意 */

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

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* 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), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-gradient: 0 10px 40px -10px rgba(102, 126, 234, 0.4);

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 200ms ease-in-out;
  --transition-slow: 300ms ease-in-out;

  /* Typography */
  --font-primary: 'Noto Sans JP', 'Inter', sans-serif;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
}

/* ===================================
   Reset & Base Styles
   =================================== */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-primary);
  font-weight: var(--font-weight-normal);
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-secondary);
  min-height: 100vh;
}

/* ===================================
   Typography
   =================================== */

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: var(--font-weight-bold);
  line-height: 1.3;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: 2.5rem;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color var(--transition-base);
}

a:hover {
  color: var(--primary-dark);
}

/* ===================================
   Layout
   =================================== */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* ===================================
   Header
   =================================== */

.header {
  background: var(--primary-gradient);
  color: white;
  padding: var(--spacing-2xl) 0;
  text-align: center;
  box-shadow: var(--shadow-gradient);
  margin-bottom: var(--spacing-2xl);
  position: relative;
  overflow: hidden;
}

.header-nav {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  font-size: 0.9rem;
  position: relative;
  z-index: 2;
}

.header-nav a {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  transition: color var(--transition-base);
}

.header-nav a:hover {
  color: white;
  text-decoration: underline;
}

.nav-divider {
  color: rgba(255, 255, 255, 0.4);
}

.header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><path d="M0 100 L50 0 L100 100 Z" fill="rgba(255,255,255,0.05)"/></svg>') repeat;
  opacity: 0.3;
  animation: slide 20s linear infinite;
}

@keyframes slide {
  0% {
    transform: translateX(0);
  }

  100% {
    transform: translateX(100px);
  }
}

.header-title {
  margin: 0;
  font-size: 2.5rem;
  font-weight: var(--font-weight-bold);
  position: relative;
  z-index: 1;
}

.header-title i {
  margin-right: var(--spacing-sm);
  animation: bounce 2s infinite;
}

@keyframes bounce {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-10px);
  }
}

.header-subtitle {
  margin: var(--spacing-sm) 0 0;
  font-size: 1.1rem;
  opacity: 0.95;
  position: relative;
  z-index: 1;
}

/* ===================================
   Cards
   =================================== */

.card {
  background: var(--bg-primary);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-lg);
  margin-bottom: var(--spacing-xl);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

/* ===================================
   Section Styles
   =================================== */

.main-content {
  padding: var(--spacing-xl) 0;
  min-height: calc(100vh - 300px);
}

.section-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
  font-size: 1.5rem;
}

.section-title i {
  color: var(--primary-color);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.section-actions {
  display: flex;
  gap: var(--spacing-sm);
}

.hidden {
  display: none !important;
}

/* ===================================
   Form Styles
   =================================== */

.equipment-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.form-label {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.1rem;
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
}

.form-label i {
  color: var(--primary-color);
}

/* Radio Button Cards */
.radio-group {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--spacing-md);
}

.radio-card {
  position: relative;
  cursor: pointer;
}

.radio-card input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.radio-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  background: var(--bg-primary);
  transition: all var(--transition-base);
  min-height: 80px;
}

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

.radio-card input[type="radio"]:checked+.radio-content {
  background: var(--primary-gradient);
  border-color: transparent;
  color: white;
  box-shadow: var(--shadow-gradient);
}

.radio-title {
  font-weight: var(--font-weight-semibold);
  font-size: 1rem;
}

.radio-subtitle {
  font-size: 0.875rem;
  opacity: 0.8;
  margin-top: var(--spacing-xs);
}

/* Toggle Switch */
.toggle-switch-wrapper {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.toggle-switch {
  position: relative;
  display: inline-block;
  width: 60px;
  height: 34px;
}

.toggle-switch input[type="checkbox"] {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  transition: var(--transition-base);
  border-radius: var(--radius-full);
}

.toggle-slider::before {
  position: absolute;
  content: "";
  height: 26px;
  width: 26px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  transition: var(--transition-base);
  border-radius: 50%;
}

.toggle-switch input:checked+.toggle-slider {
  background: var(--primary-gradient);
}

.toggle-switch input:checked+.toggle-slider::before {
  transform: translateX(26px);
}

.toggle-label {
  font-weight: var(--font-weight-medium);
  color: var(--text-secondary);
}

/* ===================================
   Buttons
   =================================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1rem;
  font-weight: var(--font-weight-semibold);
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  font-family: var(--font-primary);
}

.btn-primary {
  background: var(--primary-gradient);
  color: white;
  box-shadow: var(--shadow-md);
  width: 100%;
  justify-content: center;
  font-size: 1.1rem;
  padding: var(--spacing-lg) var(--spacing-xl);
}

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

.btn-primary:active {
  transform: translateY(0);
}

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

.btn-secondary:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
  transform: translateY(-2px);
}

.btn-link {
  background: transparent;
  color: var(--primary-color);
  padding: var(--spacing-sm) 0;
}

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

/* ===================================
   Alert Boxes
   =================================== */

.alert {
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-xl);
  display: flex;
  gap: var(--spacing-md);
  box-shadow: var(--shadow-md);
  border-left: 4px solid;
}

.alert i {
  font-size: 1.5rem;
  flex-shrink: 0;
}

.alert-content {
  flex: 1;
}

.alert-title {
  font-size: 1.1rem;
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-sm);
}

.alert-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-sm);
  font-weight: var(--font-weight-medium);
  transition: gap var(--transition-base);
}

.alert-link:hover {
  gap: var(--spacing-sm);
}

.alert-info {
  background: #e3f2fd;
  border-left-color: #2196f3;
  color: #0d47a1;
}

.alert-info i {
  color: #2196f3;
}

.alert-warning {
  background: #fff3e0;
  border-left-color: #ff9800;
  color: #e65100;
}

.alert-warning i {
  color: #ff9800;
}

.alert-danger {
  background: #ffebee;
  border-left-color: #f44336;
  color: #b71c1c;
}

.alert-danger i {
  color: #f44336;
}

/* ===================================
   Progress Section
   =================================== */

.progress-overall {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.progress-label {
  display: flex;
  justify-content: space-between;
  font-weight: var(--font-weight-medium);
  color: var(--text-secondary);
}

.progress-bar {
  height: 24px;
  background: var(--bg-accent);
  border-radius: var(--radius-full);
  overflow: hidden;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.progress-fill {
  height: 100%;
  background: var(--success-gradient);
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: var(--spacing-sm);
  color: white;
  font-size: 0.875rem;
  font-weight: var(--font-weight-semibold);
  box-shadow: 0 2px 8px rgba(79, 172, 254, 0.4);
}

/* ===================================
   Equipment List
   =================================== */

.equipment-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.equipment-category {
  background: var(--bg-primary);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.category-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  user-select: none;
  padding-bottom: var(--spacing-md);
  border-bottom: 2px solid var(--border-light);
  margin-bottom: var(--spacing-md);
}

.category-header:hover .category-title {
  color: var(--primary-color);
}

.category-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.25rem;
  margin: 0;
  transition: color var(--transition-base);
}

.category-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.category-count {
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  color: var(--text-muted);
  background: var(--bg-accent);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-full);
}

.collapse-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 1.2rem;
  padding: var(--spacing-xs);
  transition: color var(--transition-base), transform var(--transition-base);
}

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

.category-items {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  max-height: 2000px;
  overflow: hidden;
  transition: max-height var(--transition-slow), opacity var(--transition-slow);
}

.category-items.collapsed {
  max-height: 0;
  opacity: 0;
}

/* Equipment Item */
.equipment-item {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  transition: all var(--transition-base);
  border: 2px solid transparent;
}

.equipment-item:hover {
  background: var(--bg-accent);
  border-color: var(--primary-color);
  transform: translateX(4px);
}

.equipment-item.checked {
  background: #f0f9ff;
  opacity: 0.7;
}

.equipment-item.checked .item-name {
  text-decoration: line-through;
  color: var(--text-muted);
}

/* Checkbox */
.checkbox-wrapper {
  display: flex;
  align-items: flex-start;
  cursor: pointer;
  flex-shrink: 0;
  padding-top: 2px;
}

.checkbox-wrapper input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.checkbox-custom {
  width: 24px;
  height: 24px;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: white;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
  position: relative;
}

.checkbox-wrapper:hover .checkbox-custom {
  border-color: var(--primary-color);
}

.checkbox-wrapper input[type="checkbox"]:checked+.checkbox-custom {
  background: var(--primary-gradient);
  border-color: transparent;
}

.checkbox-wrapper input[type="checkbox"]:checked+.checkbox-custom::after {
  content: '\f00c';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  color: white;
  font-size: 14px;
}

/* Item Content */
.item-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.item-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.item-name {
  font-weight: var(--font-weight-semibold);
  font-size: 1rem;
  color: var(--text-primary);
}

.item-link-group {
  margin-left: auto;
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
}

.importance-badge {
  font-size: 0.7rem;
  font-weight: var(--font-weight-bold);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  color: white;
  white-space: nowrap;
}

/* Compact Link Buttons in Header */
.compact-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  font-size: 0.75rem;
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-sm);
  text-decoration: none;
  border: none;
  cursor: pointer;
  color: white;
  transition: all var(--transition-base);
}

.compact-link-btn i {
  font-size: 0.8rem;
}

.compact-link-btn.blog {
  background: #27ae60;
}

.compact-link-btn.blog:hover {
  background: #219150;
  transform: translateY(-1px);
}

.compact-link-btn.youtube {
  background: #e74c3c;
}

.compact-link-btn.youtube:hover {
  background: #c0392b;
  transform: translateY(-1px);
}

.badge-essential {
  background: #e74c3c;
}

.badge-optional {
  background: #3498db;
}

.item-description {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin: var(--spacing-xs) 0;
}

/* Link Buttons Container */
.item-links {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
  margin-top: var(--spacing-sm);
}

/* Base Link Button Style */
.link-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all var(--transition-base);
  border: none;
  cursor: pointer;
}

/* Blog Link Button (Green) */
.blog-link-btn {
  background: #27ae60;
  color: white;
}

.blog-link-btn:hover {
  background: #229954;
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(39, 174, 96, 0.3);
}

/* YouTube Link Button (Red) */
.youtube-link-btn {
  background: #e74c3c;
  color: white;
}

.youtube-link-btn:hover {
  background: #c0392b;
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(231, 76, 60, 0.3);
}

.link-btn i {
  font-size: 0.9rem;
}

/* Video Embed */
.video-embed-container {
  margin-top: var(--spacing-md);
  width: 100%;
  max-width: 500px;
}

.video-wrapper {
  position: relative;
  padding-bottom: 56.25%;
  /* 16:9 Aspect Ratio */
  height: 0;
  overflow: hidden;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.video-embed-container.hidden {
  display: none;
}

/* ===================================
   Related Articles
   =================================== */

.related-articles-section {
  margin-top: var(--spacing-2xl);
}

.articles-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.article-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  border: 2px solid transparent;
}

.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.article-content {
  padding: var(--spacing-lg);
}

.article-title {
  font-size: 1rem;
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.article-description {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ===================================
   Floating Help Button
   =================================== */

.floating-help-btn {
  position: fixed;
  bottom: var(--spacing-xl);
  right: var(--spacing-xl);
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--primary-gradient);
  color: white;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  box-shadow: var(--shadow-xl);
  transition: all var(--transition-base);
  z-index: 1000;
}

.floating-help-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 20px 40px rgba(102, 126, 234, 0.5);
}

/* ===================================
   Footer
   =================================== */

.footer {
  background: var(--text-primary);
  color: white;
  text-align: center;
  padding: var(--spacing-xl) 0;
  margin-top: var(--spacing-2xl);
}

.footer p {
  margin: var(--spacing-xs) 0;
  opacity: 0.9;
}

.footer-note {
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
}

/* ===================================
   Share Section
   =================================== */

.share-container {
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  text-align: center;
  margin: var(--spacing-xl) 0;
}

.share-title {
  font-size: 1.75rem;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
}

.share-title i {
  color: var(--primary-color);
}

.share-description {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
}

.share-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1rem;
  font-weight: var(--font-weight-semibold);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  color: white;
}

.share-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.share-btn i {
  font-size: 1.25rem;
}

.share-btn-twitter {
  background: #000000;
}

.share-btn-twitter:hover {
  background: #333333;
}

.share-btn-line {
  background: #06C755;
}

.share-btn-line:hover {
  background: #05b34a;
}

.share-btn-copy {
  background: #6c757d;
}

.share-btn-copy:hover {
  background: #5a6268;
}

.copy-notification {
  margin-top: var(--spacing-lg);
  padding: var(--spacing-md);
  background: #d4edda;
  color: #155724;
  border-radius: var(--radius-md);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  animation: slideDown 0.3s ease-out;
}

.copy-notification i {
  color: #28a745;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 768px) {
  .share-container {
    padding: var(--spacing-xl);
  }

  .share-buttons {
    flex-direction: column;
    align-items: stretch;
  }

  .share-btn {
    width: 100%;
  }
}

/* ===================================
   Print Styles
   =================================== */

@media print {
  body {
    background: white;
  }

  .header,
  .footer,
  .floating-help-btn,
  .section-actions,
  .related-articles-section {
    display: none !important;
  }

  .card {
    box-shadow: none;
    border: 1px solid #ddd;
    page-break-inside: avoid;
  }

  .equipment-item.checked {
    background: #e0f2fe;
  }

  .blog-link::after {
    content: " (" attr(href) ")";
    font-size: 0.75rem;
    color: #666;
  }
}

/* ===================================
   Responsive Design
   =================================== */

/* Tablet */
@media (max-width: 1024px) {
  .container {
    padding: 0 var(--spacing-md);
  }

  .section-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .section-actions {
    width: 100%;
  }

  .section-actions .btn {
    flex: 1;
  }
}

/* Mobile */
@media (max-width: 768px) {
  html {
    font-size: 14px;
  }

  .header {
    padding: var(--spacing-xl) 0;
  }

  .header-title {
    font-size: 1.75rem;
  }

  .header-subtitle {
    font-size: 1rem;
  }

  .card {
    padding: var(--spacing-lg);
  }

  .radio-group {
    grid-template-columns: repeat(2, 1fr);
  }

  .radio-content {
    padding: var(--spacing-md);
    min-height: 70px;
  }

  .radio-title {
    font-size: 0.9rem;
  }

  .radio-subtitle {
    font-size: 0.8rem;
  }

  .section-actions {
    flex-direction: column;
  }

  .section-actions .btn {
    width: 100%;
  }

  .articles-list {
    grid-template-columns: 1fr;
  }

  .floating-help-btn {
    bottom: var(--spacing-md);
    right: var(--spacing-md);
    width: 48px;
    height: 48px;
    font-size: 1.25rem;
  }

  .item-description {
    font-size: 0.85rem;
  }

  .blog-link {
    font-size: 0.8rem;
  }
}

@media (max-width: 480px) {
  .radio-group {
    grid-template-columns: 1fr;
  }

  .item-header {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ===================================
   Animations
   =================================== */

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.guide-section,
.progress-section,
.equipment-section,
.related-articles-section {
  animation: fadeIn var(--transition-slow) ease-out;
}

/* Smooth reveal for equipment items */
.equipment-item {
  animation: fadeIn var(--transition-base) ease-out;
}

.equipment-item:nth-child(1) {
  animation-delay: 0ms;
}

.equipment-item:nth-child(2) {
  animation-delay: 50ms;
}

.equipment-item:nth-child(3) {
  animation-delay: 100ms;
}

.equipment-item:nth-child(4) {
  animation-delay: 150ms;
}

.equipment-item:nth-child(5) {
  animation-delay: 200ms;
}

/* ===================================
   Accessibility
   =================================== */

/* Focus styles */
*:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Skip to content link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--primary-color);
  color: white;
  padding: 8px;
  text-decoration: none;
  z-index: 100;
}

.skip-link:focus {
  top: 0;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Clickable Importance Badge */
/* Checklist Note */
.checklist-note {
  background-color: var(--bg-accent);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
  font-size: 0.9rem;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.checklist-note i {
  color: var(--primary-color);
}

/* Clickable Importance Badge */
.importance-badge.clickable {
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  user-select: none;
  position: relative;
}

.importance-badge.clickable:hover {
  opacity: 1;
  transform: scale(1.1) rotate(-3deg);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
  z-index: 10;
}