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

:root {
  --primary: #1B365D;
  --secondary: #2D5016;
  --accent: #8B7355;
  --bg: #FAFAF8;
  --text: #333333;
  --sub-text: #666666;
  --border: #E5E5E0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans JP', sans-serif;
  font-weight: 400;
  line-height: 1.8;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

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

ul {
  list-style: none;
}

/* ======================
   Layout
   ====================== */
.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
}

.section-alt {
  background: #F4F4F0;
}

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  text-align: center;
  color: var(--primary);
  margin-bottom: 48px;
  letter-spacing: 0.04em;
}

/* ======================
   Header
   ====================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(250, 250, 248, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: box-shadow 0.3s;
}

.header.scrolled {
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.08);
}

.header-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

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

.nav {
  display: flex;
  gap: 32px;
}

.nav-link {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text);
  transition: color 0.2s;
  letter-spacing: 0.02em;
}

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

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

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

/* ======================
   Hero
   ====================== */
.hero {
  padding: 120px 24px 72px;
  background: var(--primary);
  position: relative;
  overflow: hidden;
}

.hero-inner {
  max-width: 1080px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: 2rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.5;
  margin-bottom: 24px;
  letter-spacing: 0.04em;
}

.hero-sub {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.9;
  max-width: 920px;
}

/* ======================
   Mission
   ====================== */
.mission-block {
  max-width: 920px;
  margin: 0 auto;
  text-align: center;
}

.mission-main {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.6;
  margin-bottom: 24px;
  letter-spacing: 0.03em;
}

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

/* ======================
   Cards (Values)
   ====================== */
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 40px 28px;
  text-align: center;
}

.card-icon {
  margin-bottom: 20px;
}

.card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 16px;
  letter-spacing: 0.04em;
}

.card-text {
  font-size: 0.95rem;
  text-align: left;
  color: var(--sub-text);
  line-height: 1.8;
}

/* ======================
   Target
   ====================== */
.target-grid {
  display: flex;
  flex-direction: column;
  gap: 28px;
  margin-bottom: 48px;
}

.target-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 28px 32px;
}

.target-icon {
  flex-shrink: 0;
  margin-top: 2px;
}

.target-label {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 6px;
}

.target-text {
  font-size: 0.95rem;
  color: var(--sub-text);
  line-height: 1.8;
}

.concern-box {
  background: #fff;
  border: 2px solid var(--accent);
  border-radius: 8px;
  padding: 36px 40px;
}

.concern-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 20px;
  text-align: center;
}

.concern-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px 32px;
}

.concern-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--text);
}

.concern-list svg {
  flex-shrink: 0;
}

/* ======================
   Profile
   ====================== */
.profile {
  max-width: 920px;
  margin: 0 auto;
}

.profile-name {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 4px;
}

.profile-ruby {
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--sub-text);
  margin-left: 12px;
}

.profile-title-text {
  font-size: 0.9rem;
  color: var(--sub-text);
  margin-bottom: 28px;
}

.profile-heading {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}

.profile-career {
  margin-bottom: 28px;
}

.profile-career li {
  font-size: 0.9rem;
  color: var(--sub-text);
  padding: 5px 0 5px 20px;
  position: relative;
}

.profile-career li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 14px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border);
  border: 2px solid var(--primary);
}

.profile-message {
  font-size: 0.95rem;
  color: var(--text);
  line-height: 1.9;
  background: #F7F7F4;
  padding: 24px;
  border-radius: 8px;
  border-left: 3px solid var(--accent);
}

/* ======================
   Footer
   ====================== */
.footer {
  background: var(--primary);
  padding: 28px 0;
  text-align: center;
}

.footer-copy {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.7);
  letter-spacing: 0.02em;
}

/* ======================
   Mobile base (default)
   ====================== */
.mobile-menu-btn {
  display: flex;
}

.nav {
  display: none;
  position: absolute;
  top: 64px;
  left: 0;
  right: 0;
  background: rgba(250, 250, 248, 0.98);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--border);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}

.nav.open {
  display: flex;
}

.nav-link {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
}

.br-pc {
  display: none;
}

.cards {
  grid-template-columns: 1fr;
  gap: 20px;
}

.concern-list {
  grid-template-columns: 1fr;
  gap: 12px;
}

.profile-ruby {
  display: block;
  margin-left: 0;
  margin-top: 2px;
}

/* ======================
   Desktop (min-width: 769px)
   ====================== */
@media (min-width: 769px) {
  /* Layout */
  .section {
    padding: 100px 0;
  }

  .section-title {
    font-size: 2.2rem;
    margin-bottom: 56px;
  }

  /* Header */
  .mobile-menu-btn {
    display: none;
  }

  .nav {
    display: flex;
    position: static;
    background: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    flex-direction: row;
    gap: 32px;
    border-top: none;
    box-shadow: none;
  }

  .nav-link {
    font-size: 1rem;
    padding: 0;
    border-bottom: none;
  }

  /* Hero */
  .hero {
    padding: 180px 24px 120px;
    min-height: 80vh;
    display: flex;
    align-items: center;
  }

  .hero-inner {
    width: 100%;
  }

  .hero-title {
    font-size: 3.5rem;
  }

  .hero-sub {
    font-size: 1.25rem;
  }

  .br-pc {
    display: inline;
  }

  /* Mission */
  .mission-main {
    font-size: 1.8rem;
  }

  .mission-desc {
    font-size: 1.1rem;
  }

  /* Cards */
  .cards {
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
  }

  .card {
    padding: 40px 28px;
  }

  .card-title {
    font-size: 1.3rem;
  }

  .card-text {
    font-size: 1.1rem;
  }

  /* Target */
  .target-label {
    font-size: 1.1rem;
  }

  .target-text {
    font-size: 1.1rem;
  }

  .concern-title {
    font-size: 1.2rem;
  }

  .concern-list {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px 32px;
  }

  .concern-list li {
    font-size: 1.1rem;
  }

  /* Profile */
  .profile-name {
    font-size: 1.5rem;
  }

  .profile-ruby {
    display: inline;
    margin-left: 12px;
    margin-top: 0;
  }

  .profile-title-text {
    font-size: 1rem;
  }

  .profile-heading {
    font-size: 1.05rem;
  }

  .profile-career li {
    font-size: 1rem;
  }

  .profile-message {
    font-size: 1.1rem;
  }
}