/* ==========================================================
   Tokens
========================================================== */
:root{
  --sky: #87cefa;
  --sky-soft: #a9dcfb;
  --slate: #778899;
  --slate-dark: #5c6b78;
  --slate-darker: #3f4b57;
  --white: #ffffff;
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-pill: 999px;
  --max-width: 1140px;
  --font: 'Noto Sans JP', 'Hiragino Sans', 'Yu Gothic', sans-serif;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }

body{
  margin: 0;
  font-family: var(--font);
  background: var(--sky);
  color: var(--white);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

img{ max-width: 100%; display: block; }
a{ color: inherit; text-decoration: none; }

.skip-link{
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--slate-darker);
  color: var(--white);
  padding: 10px 16px;
  border-radius: var(--radius-md);
  z-index: 999;
}
.skip-link:focus{ left: 10px; top: 10px; }

:focus-visible{
  outline: 3px solid var(--white);
  outline-offset: 3px;
}

.section-inner{
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 96px 24px;
}

.eyebrow{
  margin: 0 0 12px;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--slate-darker);
  opacity: 0.85;
}

.section-heading{
  margin: 0 0 40px;
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 900;
  color: var(--slate-darker);
  line-height: 1.4;
}

/* ==========================================================
   Header
========================================================== */
.site-header{
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(92, 107, 120, 0.92);
  backdrop-filter: blur(6px);
}

.header-inner{
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo{
  font-weight: 900;
  font-size: 1.25rem;
  color: var(--white);
  letter-spacing: 0.02em;
}

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

.site-nav a{
  font-weight: 500;
  color: var(--white);
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s ease;
}
.site-nav a:hover,
.site-nav a:focus-visible{
  border-color: var(--white);
}

.nav-toggle{
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
}
.nav-toggle span{
  width: 24px;
  height: 2px;
  background: var(--white);
  display: block;
}

/* ==========================================================
   Hero
========================================================== */
.hero-inner{
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 72px 24px 96px;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 56px;
  align-items: center;
}

.hero-copy{
  margin: 0 0 28px;
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  font-weight: 900;
  line-height: 1.35;
  color: var(--white);
}

.hero-panel{
  background: var(--slate);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  margin-bottom: 32px;
}
.hero-panel p{ margin: 0; }

.hero-actions{
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn{
  display: inline-block;
  padding: 14px 30px;
  border-radius: var(--radius-pill);
  font-weight: 700;
  transition: transform 0.15s ease, background 0.2s ease;
}
.btn:hover{ transform: translateY(-2px); }

.btn-primary{
  background: var(--slate-darker);
  color: var(--white);
}
.btn-primary:hover{ background: var(--slate-dark); }

.btn-outline{
  background: transparent;
  color: var(--slate-darker);
  border: 2px solid var(--slate-darker);
}
.btn-outline:hover{ background: var(--slate-darker); color: var(--white); }

.hero-visual{
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4 / 4.5;
}
.hero-visual img{ width: 100%; height: 100%; object-fit: cover; }

/* ==========================================================
   About
========================================================== */
.about{ background: var(--sky-soft); }
.about-panel{
  background: var(--slate);
  border-radius: var(--radius-lg);
  padding: 32px 36px;
  max-width: 760px;
}
.about-panel p{ margin: 0; font-size: 1.05rem; }

/* ==========================================================
   Business
========================================================== */
.business-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.business-card{
  background: var(--slate);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: left;
}

.business-icon{
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--white);
}
.business-icon img{ width: 100%; height: 100%; }

.business-card h3{
  margin: 0 0 12px;
  font-size: 1.2rem;
  font-weight: 700;
}
.business-card p{ margin: 0; opacity: 0.95; }

/* ==========================================================
   Brand
========================================================== */
.brand{ background: var(--sky-soft); }

.brand-inner{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.brand-panel{
  background: var(--slate);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  margin-bottom: 28px;
}
.brand-panel p{ margin: 0; }

.brand-visual{
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4 / 4.5;
}
.brand-visual img{ width: 100%; height: 100%; object-fit: cover; }

/* ==========================================================
   Footer
========================================================== */
.site-footer{
  background: var(--slate-darker);
  padding: 56px 24px 40px;
}
.footer-inner{
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
}
.footer-inner p{ margin: 4px 0; }
.footer-name{ font-weight: 900; font-size: 1.15rem; margin-bottom: 12px; }
.footer-inner a{ text-decoration: underline; }
.copyright{ margin-top: 20px; opacity: 0.75; font-size: 0.9rem; }

/* ==========================================================
   Responsive
========================================================== */
@media (max-width: 880px){
  .hero-inner{
    grid-template-columns: 1fr;
    padding-top: 48px;
  }
  .hero-visual{ order: -1; aspect-ratio: 16 / 10; }

  .brand-inner{ grid-template-columns: 1fr; }
  .brand-visual{ aspect-ratio: 16 / 10; }

  .business-grid{ grid-template-columns: 1fr; }

  .site-nav{
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--slate-darker);
    flex-direction: column;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease;
  }
  .site-nav.open{ max-height: 240px; }
  .site-nav a{
    padding: 16px 24px;
    border-bottom: 1px solid rgba(255,255,255,0.12);
  }
  .nav-toggle{ display: flex; }
}

@media (max-width: 480px){
  .section-inner{ padding: 64px 20px; }
  .hero-inner{ padding: 40px 20px 64px; }
  .business-card{ padding: 28px 22px; }
}