/* ========================================
   Progressia - Premium Support Page Styles
   学習管理アプリのサポートページ
   Cyan to Orange Gradient Theme
   ======================================== */

/* CSS Variables - Design Tokens */
:root {
  /* Primary Colors - Cyan/Teal */
  --color-primary: #00BCD4;
  --color-primary-light: #4DD0E1;
  --color-primary-dark: #0097A7;
  --color-primary-container: #E0F7FA;
  
  /* Secondary Colors - Orange/Coral */
  --color-secondary: #FF8A65;
  --color-secondary-light: #FFAB91;
  --color-secondary-dark: #FF5722;
  --color-secondary-container: #FBE9E7;
  
  /* Tertiary Colors - Warm Yellow */
  --color-tertiary: #FFC107;
  --color-tertiary-light: #FFD54F;
  --color-tertiary-dark: #FF8F00;
  --color-tertiary-container: #FFF8E1;
  
  /* Background Colors - Dark Theme */
  --color-bg-primary: #0F172A;
  --color-bg-secondary: #1E293B;
  --color-bg-tertiary: #334155;
  --color-bg-card: #1E293B;
  --color-bg-elevated: #334155;
  
  /* Text Colors */
  --color-text-primary: #F1F5F9;
  --color-text-secondary: #CBD5E1;
  --color-text-tertiary: #94A3B8;
  --color-text-hint: #64748B;
  
  /* Semantic Colors */
  --color-success: #10B981;
  --color-info: #3B82F6;
  --color-warning: #F59E0B;
  --color-error: #EF4444;
  
  /* Gradient Colors */
  --gradient-primary: linear-gradient(135deg, #00BCD4, #4DD0E1);
  --gradient-secondary: linear-gradient(135deg, #FF5722, #FF8A65);
  --gradient-tertiary: linear-gradient(135deg, #FFC107, #FFD54F);
  --gradient-accent: linear-gradient(135deg, #00BCD4, #FF8A65);
  --gradient-warm: linear-gradient(135deg, #FF5722, #FFCA28);
  
  /* Borders & Overlays */
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-default: rgba(255, 255, 255, 0.15);
  --border-glow: rgba(0, 188, 212, 0.3);
  --overlay-light: rgba(0, 188, 212, 0.08);
  --overlay-glass: rgba(30, 41, 59, 0.8);
  --overlay-glass-border: rgba(255, 255, 255, 0.1);
  
  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 12px;
  --spacing-base: 16px;
  --spacing-lg: 20px;
  --spacing-xl: 24px;
  --spacing-2xl: 32px;
  --spacing-3xl: 40px;
  --spacing-4xl: 48px;
  --spacing-5xl: 64px;
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-2xl: 24px;
  --radius-full: 9999px;
  
  /* Typography */
  --font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 11px;
  --font-size-sm: 13px;
  --font-size-base: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  --font-size-2xl: 24px;
  --font-size-3xl: 30px;
  --font-size-4xl: 36px;
  
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow-primary: 0 0 24px rgba(0, 188, 212, 0.4);
  --shadow-glow-secondary: 0 0 24px rgba(255, 138, 101, 0.4);
  --shadow-glow-tertiary: 0 0 24px rgba(255, 193, 7, 0.4);
  
  /* Transitions */
  --transition-fast: 200ms ease-out;
  --transition-normal: 300ms ease-out;
  --transition-slow: 500ms ease-out;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.7;
  color: var(--color-text-primary);
  background: var(--color-bg-primary);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Background Pattern - Gradient Mesh */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(ellipse at 0% 0%, rgba(0, 188, 212, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 100% 0%, rgba(255, 138, 101, 0.1) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 100%, rgba(255, 193, 7, 0.08) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

/* Floating Orbs Background */
body::after {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(circle at 15% 30%, rgba(0, 188, 212, 0.1) 0%, transparent 20%),
    radial-gradient(circle at 85% 20%, rgba(255, 138, 101, 0.08) 0%, transparent 20%),
    radial-gradient(circle at 50% 70%, rgba(255, 193, 7, 0.06) 0%, transparent 25%),
    radial-gradient(circle at 20% 80%, rgba(0, 188, 212, 0.05) 0%, transparent 20%);
  pointer-events: none;
  z-index: -1;
}

/* Container */
.container {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--spacing-xl);
}

/* Header */
.header {
  text-align: center;
  padding: var(--spacing-5xl) 0 var(--spacing-3xl);
  position: relative;
}

.header-glow {
  position: absolute;
  top: 30%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0, 188, 212, 0.15) 0%, rgba(255, 138, 101, 0.08) 50%, transparent 70%);
  pointer-events: none;
  filter: blur(40px);
}

.app-icon {
  width: 120px;
  height: 120px;
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-lg), var(--shadow-glow-primary);
  margin-bottom: var(--spacing-xl);
  position: relative;
  animation: float 6s ease-in-out infinite;
  border: 2px solid var(--overlay-glass-border);
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.app-name {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 2px;
  margin-bottom: var(--spacing-sm);
  position: relative;
}

.header-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  margin: var(--spacing-lg) 0;
}

.divider-line {
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-primary), var(--color-secondary), transparent);
  border-radius: var(--radius-full);
}

.divider-icon {
  color: var(--color-primary);
  font-size: 20px;
  filter: drop-shadow(0 0 8px rgba(0, 188, 212, 0.5));
}

.app-tagline {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  letter-spacing: 1px;
  font-weight: 400;
}

/* Badge */
.badge-container {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-xl);
  flex-wrap: wrap;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-md);
  background: rgba(0, 188, 212, 0.15);
  border: 1px solid rgba(0, 188, 212, 0.3);
  color: var(--color-primary-light);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 500;
  backdrop-filter: blur(8px);
}

.badge svg {
  width: 14px;
  height: 14px;
}

.badge-secondary {
  background: rgba(255, 138, 101, 0.15);
  border-color: rgba(255, 138, 101, 0.3);
  color: var(--color-secondary-light);
}

.badge-tertiary {
  background: rgba(255, 193, 7, 0.15);
  border-color: rgba(255, 193, 7, 0.3);
  color: var(--color-tertiary-light);
}

/* Main Content */
.main-content {
  padding: var(--spacing-2xl) 0;
}

/* Section Cards */
.section-card {
  background: var(--overlay-glass);
  border: 1px solid var(--overlay-glass-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  margin-bottom: var(--spacing-xl);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-normal);
  backdrop-filter: blur(12px);
}

.section-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.section-card:hover {
  border-color: var(--border-default);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md), 0 0 20px rgba(0, 188, 212, 0.1);
}

.section-card:hover::before {
  opacity: 1;
}

.section-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-base);
  margin-bottom: var(--spacing-lg);
}

.section-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  color: white;
  flex-shrink: 0;
  box-shadow: var(--shadow-glow-primary);
}

.section-icon.icon-secondary {
  background: var(--gradient-secondary);
  box-shadow: var(--shadow-glow-secondary);
}

.section-icon.icon-tertiary {
  background: var(--gradient-tertiary);
  box-shadow: var(--shadow-glow-tertiary);
}

.section-icon svg {
  width: 24px;
  height: 24px;
}

.section-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-text-primary);
}

.section-content {
  color: var(--color-text-secondary);
  line-height: 1.8;
}

/* KPI Grid */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-base);
  margin-top: var(--spacing-xl);
}

.kpi-card {
  background: var(--color-bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  text-align: center;
  transition: all var(--transition-normal);
}

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

.kpi-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  color: white;
}

.kpi-icon-secondary {
  background: var(--gradient-secondary);
}

.kpi-icon-tertiary {
  background: var(--gradient-tertiary);
}

.kpi-icon svg {
  width: 24px;
  height: 24px;
}

.kpi-label {
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-xs);
}

.kpi-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
}

/* Feature List */
.feature-list {
  list-style: none;
  margin-top: var(--spacing-lg);
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  padding: var(--spacing-base) 0;
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--transition-fast);
}

.feature-item:last-child {
  border-bottom: none;
}

.feature-item:hover {
  background: var(--overlay-light);
  margin: 0 calc(-1 * var(--spacing-base));
  padding-left: var(--spacing-base);
  padding-right: var(--spacing-base);
  border-radius: var(--radius-md);
}

.feature-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 188, 212, 0.15);
  border: 1px solid rgba(0, 188, 212, 0.2);
  border-radius: var(--radius-sm);
  color: var(--color-primary);
}

.feature-icon-secondary {
  background: rgba(255, 138, 101, 0.15);
  border-color: rgba(255, 138, 101, 0.2);
  color: var(--color-secondary);
}

.feature-icon-tertiary {
  background: rgba(255, 193, 7, 0.15);
  border-color: rgba(255, 193, 7, 0.2);
  color: var(--color-tertiary);
}

.feature-icon svg {
  width: 20px;
  height: 20px;
}

.feature-text {
  flex: 1;
}

.feature-title {
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 4px;
}

.feature-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
  line-height: 1.6;
}

/* Target Grid */
.target-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-base);
  margin-top: var(--spacing-lg);
}

.target-card {
  background: var(--color-bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  text-align: center;
  transition: all var(--transition-normal);
}

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

.target-icon {
  width: 44px;
  height: 44px;
  margin: 0 auto var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  color: white;
}

.target-icon-secondary {
  background: var(--gradient-secondary);
}

.target-icon-tertiary {
  background: var(--gradient-tertiary);
}

.target-icon svg {
  width: 22px;
  height: 22px;
}

.target-title {
  font-weight: 600;
  color: var(--color-text-primary);
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-xs);
}

.target-desc {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
}

/* Contact Section */
.contact-section {
  text-align: center;
  background: var(--overlay-glass);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xl);
  padding: var(--spacing-3xl);
  margin-top: var(--spacing-2xl);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(12px);
}

.contact-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-accent);
}

.contact-glow {
  position: absolute;
  bottom: -30%;
  right: -15%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(255, 138, 101, 0.15) 0%, transparent 70%);
  pointer-events: none;
  filter: blur(40px);
}

.contact-title {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-base);
  position: relative;
}

.contact-desc {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xl);
  position: relative;
}

.contact-email {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  background: var(--gradient-accent);
  color: white;
  padding: var(--spacing-base) var(--spacing-2xl);
  border-radius: var(--radius-full);
  text-decoration: none;
  font-weight: 600;
  transition: all var(--transition-normal);
  position: relative;
  box-shadow: 0 4px 16px rgba(0, 188, 212, 0.4);
}

.contact-email:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0, 188, 212, 0.5), 0 0 40px rgba(255, 138, 101, 0.3);
}

.contact-email:active {
  transform: translateY(-1px);
}

.contact-email svg {
  width: 20px;
  height: 20px;
}

/* Links */
.links-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-base);
  margin-top: var(--spacing-xl);
}

.link-card {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-base) var(--spacing-lg);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: all var(--transition-normal);
  font-weight: 500;
}

.link-card:hover {
  background: rgba(0, 188, 212, 0.1);
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateX(4px);
}

.link-card svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* Footer */
.footer {
  text-align: center;
  padding: var(--spacing-3xl) 0;
  margin-top: var(--spacing-2xl);
  border-top: 1px solid var(--border-subtle);
}

.footer-decor {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.footer-dot {
  width: 6px;
  height: 6px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  opacity: 0.4;
}

.footer-dot.center {
  width: 10px;
  height: 10px;
  background: var(--gradient-accent);
  opacity: 1;
}

.footer-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
  letter-spacing: 1px;
}

.footer-copyright {
  font-size: var(--font-size-xs);
  color: var(--color-text-hint);
  margin-top: var(--spacing-base);
}

/* Responsive */
@media (max-width: 768px) {
  .container {
    padding: var(--spacing-base);
  }
  
  .header {
    padding: var(--spacing-3xl) 0 var(--spacing-2xl);
  }
  
  .app-icon {
    width: 100px;
    height: 100px;
  }
  
  .app-name {
    font-size: var(--font-size-3xl);
    letter-spacing: 1px;
  }
  
  .app-tagline {
    font-size: var(--font-size-base);
  }
  
  .section-card {
    padding: var(--spacing-xl);
  }
  
  .kpi-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .target-grid {
    grid-template-columns: 1fr;
  }
  
  .contact-section {
    padding: var(--spacing-2xl);
  }
  
  .links-grid {
    grid-template-columns: 1fr;
  }
  
  .badge-container {
    flex-wrap: wrap;
  }
}

/* Utility Classes */
.text-primary { color: var(--color-primary); }
.text-accent { color: var(--color-secondary); }
.text-muted { color: var(--color-text-tertiary); }
.text-center { text-align: center; }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.font-bold { font-weight: 600; }

/* Highlight Text */
.highlight {
  background: linear-gradient(120deg, rgba(0, 188, 212, 0.2) 0%, rgba(255, 138, 101, 0.15) 100%);
  background-repeat: no-repeat;
  background-size: 100% 100%;
  padding: 2px 6px;
  border-radius: 4px;
}

/* Scroll Animation */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fadeInUp {
  animation: fadeInUp 0.6s ease-out forwards;
}

/* Glow Animation */
@keyframes glow {
  0%, 100% {
    filter: drop-shadow(0 0 8px rgba(0, 188, 212, 0.5));
  }
  50% {
    filter: drop-shadow(0 0 16px rgba(255, 138, 101, 0.5));
  }
}

.glow-animation {
  animation: glow 3s ease-in-out infinite;
}

/* Print Styles */
@media print {
  body::before,
  body::after {
    display: none;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .section-card {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid #ddd;
    background: white;
  }
  
  .contact-email {
    color: var(--color-primary);
    background: none;
    box-shadow: none;
  }
  
  .app-name {
    background: none;
    -webkit-text-fill-color: var(--color-primary);
    color: var(--color-primary);
  }
}