/* ===== Reset & Base ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', 'Noto Sans JP', sans-serif;
  color: #1a1a1a;
  line-height: 1.8;
  background: #fff;
}

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

/* ===== Layout ===== */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Header ===== */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid #e8e8e8;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #1a1a1a;
}

nav ul {
  display: flex;
  gap: 32px;
  list-style: none;
}

nav a {
  font-size: 0.875rem;
  color: #555;
  transition: color 0.2s;
}

nav a:hover {
  color: #1a1a1a;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: #1a1a1a;
}

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(160deg, #f7f9fc 60%, #e8f0fe 100%);
  padding-top: 64px;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.02em;
  margin-bottom: 20px;
  color: #1a1a1a;
}

.hero p {
  font-size: 1rem;
  color: #555;
  margin-bottom: 36px;
  line-height: 1.9;
}

/* ===== Button ===== */
.btn {
  display: inline-block;
  padding: 14px 36px;
  background: #1a1a1a;
  color: #fff;
  border: none;
  border-radius: 4px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  letter-spacing: 0.06em;
  transition: background 0.2s, transform 0.15s;
}

.btn:hover {
  background: #333;
  transform: translateY(-1px);
}

/* ===== Section ===== */
.section {
  padding: 96px 0;
}

.section-gray {
  background: #f7f9fc;
}

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-bottom: 40px;
  position: relative;
  padding-bottom: 16px;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 3px;
  background: #1a1a1a;
  border-radius: 2px;
}

.section-lead {
  font-size: 0.95rem;
  color: #555;
  line-height: 2;
  margin-bottom: 48px;
}

/* ===== Profile Table ===== */
.profile-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.profile-table th,
.profile-table td {
  padding: 18px 24px;
  text-align: left;
  border-bottom: 1px solid #e0e0e0;
}

.profile-table th {
  width: 30%;
  color: #555;
  font-weight: 600;
  background: transparent;
}

.profile-table tr:first-child th,
.profile-table tr:first-child td {
  border-top: 1px solid #e0e0e0;
}

/* ===== Contact List ===== */
.contact-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 24px;
}

.contact-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: #888;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  min-width: 72px;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  color: #1a1a1a;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s, color 0.2s;
  padding-bottom: 2px;
}

.contact-link:hover {
  color: #555;
  border-bottom-color: #555;
}

.contact-link svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.contact-text {
  font-size: 0.95rem;
  color: #1a1a1a;
}

/* ===== Table link ===== */
.table-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #1a1a1a;
  border-bottom: 1px solid #ccc;
  padding-bottom: 1px;
  transition: color 0.2s, border-color 0.2s;
}

.table-link:hover {
  color: #555;
  border-bottom-color: #555;
}

.link-icon {
  width: 13px;
  height: 13px;
  flex-shrink: 0;
}

/* ===== Footer ===== */
footer {
  background: #1a1a1a;
  color: #aaa;
  padding: 48px 0;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  text-align: center;
}

.footer-logo {
  color: #fff;
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
}

.footer-copy {
  font-size: 0.8rem;
}

/* ===== Responsive ===== */
@media (max-width: 640px) {
  nav ul {
    display: none;
    flex-direction: column;
    gap: 0;
    position: absolute;
    top: 64px;
    left: 0;
    width: 100%;
    background: #fff;
    border-bottom: 1px solid #e8e8e8;
    padding: 8px 0;
  }

  nav ul.open {
    display: flex;
  }

  nav a {
    display: block;
    padding: 12px 24px;
  }

  .nav-toggle {
    display: block;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .profile-table th {
    width: 40%;
  }

  .profile-table th,
  .profile-table td {
    padding: 14px 12px;
    font-size: 0.875rem;
  }

  .section {
    padding: 64px 0;
  }
}