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

:root {
  --color-white: #ffffff;
  --color-navy: #1c2c44;
  --color-navy-light: #2a3f5f;
  --color-gray: #f5f5f5;
  --color-gray-dark: #e0e0e0;
  --color-text: #333333;
  --color-text-light: #666666;
  --color-accent: #3a6ea5;
  --font-family: 'Noto Sans JP', sans-serif;
  --max-width: 1100px;
  --header-height: 80px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  background-color: var(--color-white);
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--color-white);
  border-bottom: 1px solid var(--color-gray-dark);
  z-index: 1000;
}

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

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-navy);
  letter-spacing: 0.05em;
}

.logo-sub {
  display: block;
  font-size: 0.7rem;
  font-weight: 400;
  color: var(--color-text-light);
  letter-spacing: 0.02em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  padding: 8px 14px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text);
  border-radius: 4px;
  transition: background-color 0.2s, color 0.2s;
}

.nav-link:hover {
  background-color: var(--color-gray);
  color: var(--color-navy);
}

.nav-link.active {
  color: var(--color-navy);
  background-color: var(--color-gray);
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 10px;
  background: none;
  border: none;
  cursor: pointer;
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-navy);
  transition: transform 0.3s;
}

/* Main content offset */
main {
  padding-top: var(--header-height);
}

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-light) 100%);
  color: var(--color-white);
  padding: 100px 0;
  text-align: center;
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 20px;
  letter-spacing: 0.05em;
}

.hero-subtitle {
  font-size: 1.1rem;
  opacity: 0.9;
  margin-bottom: 40px;
  line-height: 1.9;
}

.hero-btn {
  display: inline-block;
  padding: 14px 40px;
  background: var(--color-white);
  color: var(--color-navy);
  font-size: 1rem;
  font-weight: 500;
  border-radius: 4px;
  transition: transform 0.2s, box-shadow 0.2s;
}

.hero-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

/* Page header */
.page-header {
  background: var(--color-navy);
  color: var(--color-white);
  padding: 60px 0;
  text-align: center;
}

.page-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.page-subtitle {
  font-size: 0.95rem;
  opacity: 0.8;
}

/* Sections */
.section {
  padding: 80px 0;
}

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

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-navy);
  text-align: center;
  margin-bottom: 15px;
}

.section-subtitle {
  font-size: 0.95rem;
  color: var(--color-text-light);
  text-align: center;
  margin-bottom: 50px;
}

.section-header {
  margin-bottom: 50px;
}

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.card {
  background: var(--color-white);
  border-radius: 8px;
  padding: 30px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
  transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.1);
}

.card-icon {
  width: 50px;
  height: 50px;
  background: var(--color-navy);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--color-white);
  font-size: 1.5rem;
}

.card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 12px;
}

.card-text {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* Two column layout */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.content-block {
  margin-bottom: 30px;
}

.content-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 15px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-navy);
  display: inline-block;
}

.content-text {
  font-size: 0.95rem;
  color: var(--color-text);
  line-height: 1.9;
}

/* List styles */
.feature-list {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 15px;
}

.feature-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  background: var(--color-navy);
  color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  margin-top: 2px;
}

.feature-text {
  font-size: 0.95rem;
  line-height: 1.7;
}

/* Table */
.info-table {
  width: 100%;
  border-collapse: collapse;
}

.info-table th,
.info-table td {
  padding: 18px 20px;
  text-align: left;
  border-bottom: 1px solid var(--color-gray-dark);
  font-size: 0.95rem;
}

.info-table th {
  width: 160px;
  background: var(--color-gray);
  color: var(--color-navy);
  font-weight: 500;
}

.info-table td {
  background: var(--color-white);
}

/* Timeline / History */
.history-list {
  position: relative;
  padding-left: 30px;
}

.history-list::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: var(--color-gray-dark);
}

.history-item {
  position: relative;
  padding-bottom: 30px;
}

.history-item::before {
  content: '';
  position: absolute;
  left: -26px;
  top: 8px;
  width: 12px;
  height: 12px;
  background: var(--color-navy);
  border-radius: 50%;
}

.history-year {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 5px;
}

.history-text {
  font-size: 0.9rem;
  color: var(--color-text);
  line-height: 1.7;
}

/* Works list */
.works-category {
  margin-bottom: 50px;
}

.works-category-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-navy);
  padding: 15px 20px;
  background: var(--color-gray);
  margin-bottom: 20px;
  border-left: 4px solid var(--color-navy);
}

.works-list {
  display: grid;
  gap: 12px;
}

.works-item {
  display: flex;
  gap: 15px;
  padding: 15px 20px;
  background: var(--color-white);
  border-radius: 4px;
  border: 1px solid var(--color-gray-dark);
}

.works-year {
  flex-shrink: 0;
  font-size: 0.85rem;
  color: var(--color-text-light);
  min-width: 80px;
}

.works-name {
  font-size: 0.95rem;
  color: var(--color-text);
}

.works-client {
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin-left: auto;
  flex-shrink: 0;
}

/* CTA Section */
.cta {
  background: var(--color-navy);
  color: var(--color-white);
  padding: 80px 0;
  text-align: center;
}

.cta-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 15px;
}

.cta-text {
  font-size: 1rem;
  opacity: 0.9;
  margin-bottom: 30px;
}

.cta-btn {
  display: inline-block;
  padding: 14px 40px;
  background: var(--color-white);
  color: var(--color-navy);
  font-size: 1rem;
  font-weight: 500;
  border-radius: 4px;
  transition: transform 0.2s;
}

.cta-btn:hover {
  transform: translateY(-2px);
}

/* Contact form */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
}

.contact-info h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 20px;
}

.contact-item {
  margin-bottom: 25px;
}

.contact-label {
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin-bottom: 5px;
}

.contact-value {
  font-size: 1rem;
  color: var(--color-text);
}

.contact-value a {
  color: var(--color-navy);
}

.contact-form {
  background: var(--color-white);
  padding: 40px;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.form-group {
  margin-bottom: 25px;
}

.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 8px;
}

.form-label .required {
  color: #c00;
  font-size: 0.8rem;
  margin-left: 5px;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 12px 15px;
  font-size: 1rem;
  font-family: inherit;
  border: 1px solid var(--color-gray-dark);
  border-radius: 4px;
  transition: border-color 0.2s;
}

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

.form-textarea {
  min-height: 150px;
  resize: vertical;
}

.form-submit {
  width: 100%;
  padding: 15px;
  background: var(--color-navy);
  color: var(--color-white);
  font-size: 1rem;
  font-weight: 500;
  font-family: inherit;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.2s;
}

.form-submit:hover {
  background: var(--color-navy-light);
}

/* Footer */
.footer {
  background: var(--color-navy);
  color: var(--color-white);
  padding: 60px 0 30px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 40px;
}

.footer-company {
  max-width: 350px;
}

.footer-name {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 15px;
}

.footer-address {
  font-size: 0.85rem;
  opacity: 0.8;
  line-height: 1.8;
}

.footer-nav {
  display: flex;
  gap: 30px;
}

.footer-nav a {
  font-size: 0.9rem;
  opacity: 0.8;
  transition: opacity 0.2s;
}

.footer-nav a:hover {
  opacity: 1;
}

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid rgba(255,255,255,0.1);
  text-align: center;
}

.copyright {
  font-size: 0.8rem;
  opacity: 0.6;
}

/* Message box */
.message-box {
  background: var(--color-gray);
  padding: 40px;
  border-radius: 8px;
  border-left: 4px solid var(--color-navy);
}

.message-text {
  font-size: 1rem;
  line-height: 2;
  color: var(--color-text);
}

.message-author {
  margin-top: 20px;
  text-align: right;
  font-size: 0.9rem;
  color: var(--color-text-light);
}

/* Featured works */
.featured-works {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.featured-work {
  background: var(--color-white);
  padding: 25px;
  border-radius: 8px;
  border: 1px solid var(--color-gray-dark);
}

.featured-work-category {
  display: inline-block;
  padding: 4px 12px;
  background: var(--color-navy);
  color: var(--color-white);
  font-size: 0.75rem;
  border-radius: 4px;
  margin-bottom: 12px;
}

.featured-work-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 8px;
}

.featured-work-client {
  font-size: 0.85rem;
  color: var(--color-text-light);
}

/* Company summary (home) */
.company-summary {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  text-align: center;
}

.summary-item {
  padding: 30px 20px;
  background: var(--color-white);
  border-radius: 8px;
}

.summary-label {
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin-bottom: 10px;
}

.summary-value {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-navy);
}

/* Responsive */
@media (max-width: 900px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .two-col {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .featured-works {
    grid-template-columns: 1fr;
  }
  
  .company-summary {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-inner {
    flex-direction: column;
    gap: 30px;
  }
  
  .footer-nav {
    flex-wrap: wrap;
    gap: 15px 30px;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 70px;
  }
  
  .nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    padding: 20px;
    border-bottom: 1px solid var(--color-gray-dark);
    display: none;
  }
  
  .nav.active {
    display: flex;
  }
  
  .nav-link {
    width: 100%;
    text-align: center;
    padding: 12px;
  }
  
  .mobile-menu-btn {
    display: flex;
  }
  
  .hero {
    padding: 60px 0;
  }
  
  .hero-title {
    font-size: 1.75rem;
  }
  
  .section {
    padding: 60px 0;
  }
  
  .section-title {
    font-size: 1.4rem;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
  }
  
  .info-table th,
  .info-table td {
    display: block;
    width: 100%;
  }
  
  .info-table th {
    border-bottom: none;
    padding-bottom: 5px;
  }
  
  .info-table td {
    padding-top: 5px;
    padding-bottom: 20px;
  }
  
  .works-item {
    flex-direction: column;
    gap: 5px;
  }
  
  .works-client {
    margin-left: 0;
  }
  
  .company-summary {
    grid-template-columns: 1fr;
  }
  
  .contact-form {
    padding: 25px;
  }
}