/* ============================================
   CSS Variables
============================================ */
:root {
  /* Colors */
  --color-primary: #054394;
  --color-secondary: #0B3D91;
  --color-tertiary: #2BD4FF;
  --color-accent: #1E6FD9;
  --color-text: #111111;
  --color-text-light: #6B7280;
  --color-text-white: #ffffff;
  --color-bg: #ffffff;
  --color-bg-light: #EAF3FF;
  --color-border: #d1e3f8;

  /* Typography */
  --font-base: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-heading: 'Noto Sans JP', "Helvetica Neue", Arial, sans-serif;
  --font-size-base: 16px;
  --font-size-sm: 0.875rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.5rem;
  --font-size-xxl: 2rem;
  --font-size-xxxl: 2.5rem;
  --font-size-xxxxl: 3rem;
  --font-size-xxxxxl: 4rem;
  --line-height-base: 1.8;
  --line-height-heading: 1.4;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;

  /* Container */
  --container-max-width: 1200px;
  --container-padding: 20px;

  /* Transitions */
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Z-index */
  --z-header: 1000;
  --z-modal: 2000;
  --z-loading: 3000;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;

  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);
}

/* ============================================
   Base Styles
============================================ */
html {
  font-size: var(--font-size-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: var(--line-height-base);
  overflow-x: hidden;
  letter-spacing: 0.05em;
  font-weight: 400;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: var(--line-height-heading);
  margin-bottom: var(--spacing-sm);
  letter-spacing: 0.05em;
}

h1 {
  font-size: clamp(1.6rem, 2vw, 2rem);
}

h2 {
  font-size: clamp(1.3rem, 2.5vw, 1.7rem);
}

h3 {
  font-size: clamp(1.1rem, 2vw, 1.2rem);
}

h4 {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-base);
}

a:hover {
  color: var(--color-accent);
}

/* List Styles */
ul, ol {
  padding-left: 1.5rem;
  margin-bottom: var(--spacing-sm);
}

/* Image Styles */
img {
  height: auto;
}

/* Focus Styles */
*:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Selection Styles */
::selection {
  background-color: var(--color-primary);
  color: var(--color-text-white);
}

::-moz-selection {
  background-color: var(--color-primary);
  color: var(--color-text-white);
}

/* ============================================
   Scroll Margin for Fixed Header
============================================ */
/* アンカーリンク用のスクロールマージン（固定ヘッダーと重ならないように） */
section[id] {
  scroll-margin-top: 100px;
}

/* モバイルではヘッダーが小さいので調整 */
@media (max-width: 768px) {
  section[id] {
    scroll-margin-top: clamp(40px,5vw,80px);
  }
}

/* ============================================
   Layout - Container
============================================ */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* ============================================
   Layout - Section
============================================ */
.section {
  padding: var(--spacing-xl) 0;
}

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

.section-title-area {
  text-align: left;
  margin-bottom: var(--spacing-lg);
}

.section-title {
  text-align: left;
  font-size: clamp(2rem, 5vw, 5rem);
  margin-bottom: 0.5rem;
  color: var(--color-primary);
  font-weight: 900;
  font-family: 'Helvetica Neue', Arial, sans-serif;
  letter-spacing: 0.05em;
  line-height: 1.2;
}

.section-title-ja {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-align: left;
  color: var(--color-text-light);
  font-size: clamp(0.85rem, 2vw, 1.5rem);
  margin-bottom: 0;
  font-weight: 400;
}

.section-title-icon {
  width: 1.2em;
  height: auto;
  flex-shrink: 0;
}

/* ============================================
   Header
============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-header);
  background-color: rgba(255, 255, 255, 0.98);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  transition: all var(--transition-base);
}

.header-inner {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 1rem var(--container-padding);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  text-decoration: none;
  color: var(--color-text);
}

.logo-text img {
  width: 100%;
  height: 100%;
  max-height: clamp(35px, 0.5vw, 50px);
  object-fit: contain;
}

.nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  gap: 2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-base);
  font-size: 0.95rem;
}

.nav-link:hover {
  color: var(--color-primary);
}

.nav-link.active {
  color: var(--color-primary);
}

.header-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.75rem 1.5rem;
  background-color: var(--color-primary);
  color: white;
  text-decoration: none;
  border-radius: 50px;
  font-weight: 500;
  transition: all var(--transition-base);
  font-size: 0.95rem;
}

.header-cta-btn svg {
  flex-shrink: 0;
}

.header-cta-btn:hover {
  background-color: var(--color-secondary);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(30, 111, 217, 0.3);
}

.header-cta-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.header-cta-btn-service {
  background-color: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.header-cta-btn-service:hover {
  background-color: var(--color-primary);
  color: white;
}

.hamburger {
  display: none;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 10px;
  z-index: calc(var(--z-header) + 10);
  position: relative;
}

.hamburger-line {
  height: 2px;
  background-color: var(--color-text);
  transition: all var(--transition-base);
  display: block;
}

.hamburger-line:first-child {
  width: 30px;
}

.hamburger-line:last-child {
  width: 20px;
}

/* ハンバーガーメニュー アクティブ状態（クリック時に短くなる） */
.hamburger.active .hamburger-line:first-child {
  width: 24px;
}

.hamburger.active .hamburger-line:last-child {
  width: 16px;
}

@media (max-width: 768px) {
  .nav, .header-cta-btn, .header-cta-group {
    display: none;
  }

  .hamburger {
    display: flex;
  }
}

/* ============================================
   Mobile Menu
============================================ */
.mobile-menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 80%;
  max-width: 320px;
  height: 100vh;
  background-color: rgba(255, 255, 255, 0.98);
  z-index: calc(var(--z-header) - 1);
  transition: right var(--transition-base);
  box-shadow: -5px 0 20px rgba(0, 0, 0, 0.1);
  padding-top: 100px;
  overflow-y: auto;
}

.mobile-menu.active {
  right: 0;
}

.mobile-nav {
  padding: 0 var(--container-padding);
}

.mobile-nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.mobile-nav-list li {
  border-bottom: 1px solid var(--color-border);
}

.mobile-nav-link {
  display: block;
  padding: 1.25rem 0;
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  font-size: 1rem;
  transition: color var(--transition-base);
}

.mobile-nav-link:hover {
  color: var(--color-primary);
}

.mobile-cta-btn {
  display: block;
  margin-top: 2rem;
  padding: 1rem;
  background-color: var(--color-primary);
  color: white;
  text-align: center;
  text-decoration: none;
  border-radius: 50px;
  font-weight: 500;
  transition: all var(--transition-base);
}

.mobile-cta-btn:hover {
  background-color: var(--color-secondary);
  color: white;
}

/* Mobile Menu Overlay */
.mobile-menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: calc(var(--z-header) - 2);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

.mobile-menu-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* Body scroll lock when menu is open */
body.menu-open {
  overflow: hidden;
}

/* ============================================
   Fixed Contact Buttons (Mobile)
============================================ */
.fixed-contact-buttons {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: none;
  gap: 0;
  z-index: 999;
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
}

.fixed-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.6rem;
  text-decoration: none;
  color: white;
  font-weight: 700;
  font-size: 0.8rem;
  transition: all var(--transition-base);
}

.fixed-btn svg {
  flex-shrink: 0;
}

.fixed-btn-apply {
  background-color: var(--color-primary);
}

.fixed-btn-service {
  background-color: var(--color-secondary);
}

.fixed-btn:hover {
  opacity: 0.9;
  color: white;
}

@media (max-width: 768px) {
  .fixed-contact-buttons {
    display: flex;
  }
}

/* ============================================
   Footer
============================================ */
.footer {
  background-color: var(--color-text);
  color: white;
  padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-bottom: var(--spacing-md);
}

.footer-logo {
  margin-bottom: 1rem;
  display: flex;
  justify-content: flex-start;
}

.footer-logo img {
  height: auto;
  max-height: clamp(30px, 4vw, 40px);
  object-fit: contain;
}

.footer-description {
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.8;
  font-size: 0.95rem;
}

.footer-nav {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.footer-nav a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: color var(--transition-base);
  font-size: 0.95rem;
}

.footer-nav a:hover {
  color: white;
}

.footer-bottom {
  text-align: left;
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.85rem;
  margin: 0;
}

@media (max-width: 768px) {
  .footer-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-nav {
    flex-direction: column;
    gap: 1rem;
  }

  .footer {
    padding-bottom: 100px;
  }
}

/* ============================================
   Buttons
============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 2rem;
  text-align: center;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  line-height: 1.5;
  font-weight: 500;
  font-size: 1rem;
}

.btn-primary {
  background-color: var(--color-primary);
  color: white;
  border: 2px solid var(--color-primary);
}

.btn-primary:hover {
  background-color: var(--color-secondary);
  border-color: var(--color-secondary);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(30, 111, 217, 0.3);
}

.btn-secondary {
  background-color: var(--color-text);
  color: white;
  border: 2px solid var(--color-text);
  min-width: 200px;
}

.btn-secondary:hover {
  background-color: var(--color-secondary);
  border-color: var(--color-secondary);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(11, 61, 145, 0.3);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-outline:hover {
  background-color: var(--color-primary);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(30, 111, 217, 0.2);
}

.btn-lg {
  padding: 1.25rem 2.5rem;
  font-size: 1.1rem;
}

.btn-max {
  width: 100%;
}

@media (max-width: 768px) {
  .btn {
    padding: 0.875rem 1.5rem;
    font-size: 0.95rem;
  }

  .btn-lg {
    padding: 1rem 2rem;
    font-size: 1rem;
  }
}

/* ============================================
   Form Elements
============================================ */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.95rem;
}

.form-required {
  color: #dc3545;
  font-size: 0.8rem;
  margin-left: 0.25rem;
}

.form-input,
.form-textarea,
select.form-input {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-family: var(--font-base);
  transition: all var(--transition-base);
  background-color: white;
  color: var(--color-text);
}

.form-input:focus,
.form-textarea:focus,
select.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(30, 111, 217, 0.1);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
  line-height: 1.6;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-light);
}

/* ============================================
   Fade In Animation
============================================ */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ============================================
   Loading Overlay
============================================ */
.loading {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-loading);
  opacity: 1;
  visibility: visible;
  transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.loading.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loading-logo {
  width: 80px;
  height: 80px;
  animation: logoPulse 1.5s ease-in-out infinite;
}

.loading-logo svg {
  width: 100%;
  height: 100%;
}

.loading-logo-path-1 {
  fill: #fff;
  animation: logoPath1 1.5s ease-in-out infinite;
}

.loading-logo-path-2 {
  fill: #fff;
  animation: logoPath2 1.5s ease-in-out infinite;
  animation-delay: 0.3s;
}

@keyframes logoPulse {
  0%, 100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.1);
    opacity: 0.8;
  }
}

@keyframes logoPath1 {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

@keyframes logoPath2 {
  0%, 100% {
    opacity: 0.5;
  }
  50% {
    opacity: 1;
  }
}

/* ============================================
   Page Header (for sub pages)
============================================ */
.page-header {
  background-color: var(--color-bg-light);
  padding: var(--spacing-lg) 0;
  margin-top: 70px;
}

.page-header-inner {
  text-align: center;
}

.page-title {
  font-size: clamp(2rem, 5vw, 3rem);
  color: var(--color-primary);
  font-weight: 900;
  margin-bottom: 0.5rem;
  font-family: 'Helvetica Neue', Arial, sans-serif;
  letter-spacing: 0.05em;
}

.page-title-ja {
  color: var(--color-text-light);
  font-size: 1rem;
  margin: 0;
}

/* ============================================
   Breadcrumb
============================================ */
.breadcrumb {
  padding: 1rem 0;
  background-color: white;
  border-bottom: 1px solid var(--color-border);
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.9rem;
}

.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.breadcrumb-item:not(:last-child)::after {
  content: '>';
  color: var(--color-text-light);
}

.breadcrumb-item a {
  color: var(--color-text-light);
  text-decoration: none;
  transition: color var(--transition-base);
}

.breadcrumb-item a:hover {
  color: var(--color-primary);
}

.breadcrumb-item.current {
  color: var(--color-text);
}