@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;700&display=swap');

:root {
  /* Color Palette - Soft & Natural */
  --color-primary: #333333; /* Dark text for readability */
  --color-secondary: #666666; /* Subtext */
  --color-bg: #FAFAFA; /* Off-white background */
  --color-accent-beige: #F5F1E7; /* Soft beige for sections/cards */
  --color-accent-gray: #EAEAEA; /* Light gray for borders/subtle backgrounds */
  --color-white: #FFFFFF;
  --color-border: #DDDDDD;
  
  /* Typography */
  --font-main: 'Noto Sans JP', sans-serif;
  --line-height-relaxed: 1.8;
  
  /* Spacing & Layout */
  --spacing-sm: 16px;
  --spacing-md: 32px;
  --spacing-lg: 64px;
  --spacing-xl: 120px;
  
  --border-radius: 12px;
  --max-width: 1100px;
}

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

body {
  font-family: var(--font-main);
  color: var(--color-primary);
  background-color: var(--color-bg);
  line-height: var(--line-height-relaxed);
  -webkit-font-smoothing: antialiased;
  letter-spacing: 0.05em;
}

/* Typography utilities */
h1, h2, h3, h4, h5, h6 {
  font-weight: 500;
  line-height: 1.4;
  margin-bottom: var(--spacing-sm);
}

h2.section-title {
  text-align: center;
  font-size: 2rem;
  margin-bottom: var(--spacing-lg);
  font-weight: 400;
  letter-spacing: 0.1em;
}

p {
  margin-bottom: var(--spacing-md);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: opacity 0.3s ease;
}

a:hover {
  opacity: 0.7;
}

img {
  max-width: 100%;
  height: auto;
  border-radius: var(--border-radius); /* Soft corners as requested */
  display: block;
}

/* Layout containers */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

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

/* Background utilities */
.bg-beige {
  background-color: var(--color-accent-beige);
}

.bg-white {
  background-color: var(--color-white);
}

/* Header */
header {
  background-color: rgba(250, 250, 250, 0.95);
  backdrop-filter: blur(5px);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--color-accent-gray);
  padding: var(--spacing-sm) 0;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.logo {
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: 0.1em;
}

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

.nav-links a {
  font-size: 0.95rem;
  font-weight: 400;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 16px 40px;
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: 30px; /* Pill shape for buttons */
  font-weight: 500;
  text-align: center;
  cursor: pointer;
  border: none;
  transition: all 0.3s ease;
}

.btn:hover {
  background-color: var(--color-secondary);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

/* Forms */
.form-group {
  margin-bottom: var(--spacing-md);
}

label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  font-size: 0.95rem;
}

.required {
  color: #d9534f;
  font-size: 0.8rem;
  margin-left: 4px;
}

input[type="text"],
input[type="email"],
textarea {
  width: 100%;
  padding: 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  background-color: var(--color-white);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color 0.3s;
}

input:focus,
textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}

/* Footer */
footer {
  background-color: var(--color-white);
  padding: var(--spacing-lg) 0 var(--spacing-md);
  text-align: center;
  border-top: 1px solid var(--color-accent-gray);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  list-style: none;
}

.footer-links a {
  font-size: 0.9rem;
  color: var(--color-secondary);
}

.copyright {
  font-size: 0.8rem;
  color: var(--color-secondary);
}

/* Responsive */
@media (max-width: 768px) {
  :root {
    --spacing-xl: 64px;
    --spacing-lg: 40px;
  }
  
  .header-inner {
    flex-direction: column;
    gap: 16px;
  }
  
  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
  }
  
  h2.section-title {
    font-size: 1.5rem;
  }
}