:root {
  /* Color Variables - 白と青ベースのクリーンなカラーパレット */
  --primary-blue: #178CC0;
  --primary-blue-light: #3b82f6;
  --primary-blue-dark: #1d4ed8;
  --accent-blue: #60a5fa;
  --white: #ffffff;
  --black: #111827;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --link-blue: #1d4ed8;
  --success-green: #2bce98;
  --error-red: #ef4444;
  
  /* 追加カラー */
  --form-bg: #ffffff;
  --form-border: #d1d1d1;
  --form-border-focus: #178CC0;
  --form-label-required: #ef4444;
  
  /* カレンダーカラー */
  --calendar-available: #ffffff;
  --calendar-unavailable: #dcdcdc;
  --calendar-weekend: #e4e4ff;
  --calendar-holiday: #ffe4e4;
  --calendar-selected: #178CC0;
  
  /* Font Variables */
  --font-main: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  
  /* Size Variables */
  --header-height: 80px;
  --footer-height: 80px;
  --container-max-width: 1366px;
  --content-max-width: 900px;
  
  /* Spacing Variables */
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  
  /* Shadow Variables */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.02);
  --shadow-md: 0 2px 4px -1px rgba(0, 0, 0, 0.05), 0 1px 2px -1px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  --shadow-header: 0px 1px 3px 0px rgba(0, 0, 0, 0.08);
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
}

/* Base Styles */
html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  line-height: 1.6;
  color: var(--gray-800);
  background-color: var(--gray-50);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  border: none;
  outline: none;
}

/* Container */
.container {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  border: none;
  outline: none;
}

/* Header */
.header {
  background-color: var(--white);
  height: var(--header-height);
  box-shadow: var(--shadow-header);
  position: relative;
  z-index: 10;
  border: none;
  outline: none;
}

.header__content {
  display: flex;
  align-items: center;
  height: 100%;
  gap: var(--space-2xl);
}

.header__logo {
  width: 302px;
  height: 50px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  margin-left: 98px;
}

.header__logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.header__title {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.448;
  color: var(--primary-blue);
  letter-spacing: 0.025em;
  margin-left: 32px;
}

/* Main Content */
.main {
  flex: 1;
  padding: var(--space-3xl) 0;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - var(--header-height) - var(--footer-height));
}

.main .container {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  flex-direction: column;
}

/* Footer */
.footer {
  background-color: var(--gray-600);
  height: var(--footer-height);
  margin-top: auto;
}

.footer__content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.footer__links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  margin-left: 77px;
}

.footer__link {
  font-size: 14px;
  font-weight: 500;
  color: var(--white);
  text-decoration: none;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) 0;
}

.footer__link:hover {
  color: var(--primary-blue);
}

.footer__link::after {
  content: '↗';
  font-size: 12px;
  opacity: 0.7;
  transition: all var(--transition-fast);
}

.footer__link:hover::after {
  opacity: 1;
  transform: translate(1px, -1px);
}

.footer__separator {
  width: 1px;
  height: 16px;
  background-color: var(--white);
}

.footer__copyright {
  font-size: 12px;
  font-weight: 400;
  color: var(--white);
  letter-spacing: 0.025em;
  margin-right: 77px;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .container {
    padding: 0 var(--space-md);
  }
  
  .header__logo {
    margin-left: 20px;
    width: 250px;
    height: 40px;
  }
  
  .header__title {
    font-size: 24px;
    margin-left: var(--space-lg);
  }
  
  .footer__links {
    margin-left: 20px;
  }
  
  .footer__copyright {
    margin-right: 20px;
  }
}

@media (max-width: 768px) {
  .main {
    padding: var(--space-lg) 0;
  }
  
  .header {
    height: 100px;
    padding: var(--space-md) 0;
  }
  
  .header__content {
    gap: var(--space-lg);
    flex-wrap: wrap;
  }
  
  .header__logo {
    margin-left: var(--space-md);
    /* width: 180px;
    height: 30px; */
  }
  
  .header__title {
    font-size: 18px;
    margin: -10px auto 0;
  }
  
  .footer__content {
    flex-direction: column;
    gap: var(--space-md);
    padding: var(--space-md) 0;
    height: auto;
  }
  
  .footer {
    height: auto;
    padding: var(--space-md) 0;
  }
  
  .footer__links {
    margin-left: 0;
    gap: var(--space-lg);
  }
  
  .footer__copyright {
    margin-right: 0;
  }
}

@media (max-width: 480px) {
  .header__content {
    gap: var(--space-md);
  }
  
  /* .header__logo {
    width: 150px;
    height: 25px;
  } */
  
  .header__title {
    font-size: 16px;
    /* margin-left: var(--space-sm); */
  }
  
  .footer__links {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }
  
  .footer__separator {
    display: none;
  }
}

/* Animation and Performance Enhancements */
@media (prefers-reduced-motion: no-preference) {
  .footer__link {
    transition: all var(--transition-normal);
  }
}

/* Focus indicators for accessibility */
.footer__link:focus {
  outline: 2px solid var(--primary-blue);
  outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .header {
    border-bottom: 2px solid var(--gray-800);
  }
}