/* CSS Variables */
:root {
  --primary-color: #1E40AF;
  --secondary-color: #F8FAFC;
  --text-dark: #0F172A;
  --text-light: #64748B;
  --spacing-section: 6rem; /* py-24相当 */
  --border-radius: 0.5rem;
  --transition-duration: 0.3s;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans JP', sans-serif;
  line-height: 1.6;
  color: var(--text-dark);
  background-color: var(--secondary-color);
}

/* Animation Classes */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.slide-in-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.slide-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.slide-in-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.slide-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

.scale-in {
  opacity: 0;
  transform: scale(0.95);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.scale-in.visible {
  opacity: 1;
  transform: scale(1);
}

/* After Card Hover Effect */
.after-card {
  transition: transform 0.4s ease-out, box-shadow 0.4s ease-out;
}

.after-card:hover {
  transform: scale(1.02);
  box-shadow: 0 20px 40px rgba(16, 24, 40, 0.15);
}

/* Custom Button Styles */
.btn-primary {
  background-color: var(--primary-color);
  color: white;
  padding: 1rem 2rem;
  border-radius: var(--border-radius);
  font-weight: 500;
  transition: all var(--transition-duration) ease;
  border: none;
  cursor: pointer;
  display: inline-block;
  text-decoration: none;
}

.btn-primary:hover {
  background-color: #1E3A8A;
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(30, 64, 175, 0.3);
}

/* CTA Shine Effect */
.shine {
  position: relative;
  overflow: hidden;
}

.shine::before {
  content: "";
  position: absolute;
  top: 0;
  left: -150%;
  width: 50%;
  height: 100%;
  background: linear-gradient(120deg, rgba(255,255,255,0) 0%, rgba(255,255,255,0.6) 50%, rgba(255,255,255,0) 100%);
  transform: skewX(-20deg);
  animation: shine-move 3.5s ease-out infinite;
}

@keyframes shine-move {
  0% { left: -150%; }
  60% { left: 150%; }
  100% { left: 150%; }
}

.btn-secondary {
  color: var(--primary-color);
  background-color: transparent;
  border: 2px solid var(--primary-color);
  padding: 1rem 2rem;
  border-radius: var(--border-radius);
  font-weight: 500;
  transition: all var(--transition-duration) ease;
  cursor: pointer;
  display: inline-block;
  text-decoration: none;
}

.btn-secondary:hover {
  background-color: rgba(30, 64, 175, 0.1);
  transform: translateY(-2px);
}

/* Card Styles */
.card {
  background: white;
  border-radius: 1rem;
  padding: 2rem;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  transition: all var(--transition-duration) ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 25px rgba(0, 0, 0, 0.1);
}

/* Icon with X Mark */
.icon-with-x {
  position: relative;
  display: inline-block;
}

.x-mark {
  position: absolute;
  top: -8px;
  right: -8px;
  width: 24px;
  height: 24px;
  background-color: #EF4444;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 14px;
}

/* Section Spacing */
.section-spacing {
  padding-top: var(--spacing-section);
  padding-bottom: var(--spacing-section);
}

/* Typography Enhancements */
.text-gradient {
  background: linear-gradient(135deg, var(--primary-color), #3B82F6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Responsive Design */
@media (max-width: 768px) {
  :root {
    --spacing-section: 4rem; /* py-16相当 */
  }
  
  .btn-primary,
  .btn-secondary {
    padding: 0.875rem 1.5rem;
    font-size: 0.95rem;
  }
  
  .card {
    padding: 1.5rem;
  }
}

@media (max-width: 640px) {
  :root {
    --spacing-section: 3rem; /* py-12相当 */
  }
  
  .btn-primary,
  .btn-secondary {
    padding: 0.75rem 1.25rem;
    font-size: 0.9rem;
  }
  
  .card {
    padding: 1.25rem;
  }
}

/* Loading Animation */
@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.loading {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* Smooth Scrolling Enhancement */
html {
  scroll-behavior: smooth;
}

/* Focus States for Accessibility */
button:focus,
.btn-primary:focus,
.btn-secondary:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--secondary-color);
}

::-webkit-scrollbar-thumb {
  background: var(--primary-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: #1E3A8A;
}