@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;700&display=swap');

:root {
  --color-navy: #001f3f;
  --color-navy-light: #003366;
  --color-white: #ffffff;
  --color-orange: #ff851b;
  --color-gold: #ffdc00;
  --color-gray: #f4f4f4;
}

body {
  font-family: 'Noto Sans JP', sans-serif;
  color: var(--color-navy);
  background-color: var(--color-white);
  line-height: 1.6;
}

/* Background Patterns */
.bg-grid {
  background-image:
    linear-gradient(to right, rgba(0, 31, 63, 0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0, 31, 63, 0.05) 1px, transparent 1px);
  background-size: 20px 20px;
}

.bg-dot {
  background-image: radial-gradient(rgba(0, 31, 63, 0.1) 1px, transparent 0);
  background-size: 24px 24px;
}

/* FV Background with Engineering feel */
.fv-bg {
  background:
    linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-light) 100%);
  position: relative;
  overflow: hidden;
}

.fv-bg::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 50px 50px;
  mask-image: radial-gradient(circle at 70% 30%, black, transparent 70%);
}

/* Animations */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Button styles */
.btn-primary {
  background-color: var(--color-orange);
  color: white;
  transition: all 0.3s ease;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.btn-primary:hover {
  background-color: #e67716;
  transform: translateY(-2px);
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.btn-outline {
  border: 2px solid var(--color-navy);
  color: var(--color-navy);
  transition: all 0.3s ease;
}

.btn-outline:hover {
  background-color: var(--color-navy);
  color: white;
}