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

:root {
  --bg: #0a0a0f;
  --bg-subtle: #111118;
  --border: #1e1e2e;
  --accent: #00b4d8;
  --accent-dim: #0077a8;
  --text: #e0e0f0;
  --text-muted: #888899;
  --max-w: 800px;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: "Hiragino Sans", "Noto Sans JP", system-ui, -apple-system, sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* ── Layout ── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

section {
  padding: 5rem 0;
  border-bottom: 1px solid var(--border);
}

section:last-of-type {
  border-bottom: none;
}

/* ── Header ── */
header {
  position: sticky;
  top: 0;
  z-index: 10;
  background-color: rgba(10, 10, 15, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--text);
  text-decoration: none;
}

.logo span {
  color: var(--accent);
}

/* ── Hero ── */
#hero {
  padding: 7rem 0 6rem;
  border-bottom: 1px solid var(--border);
}

.hero-label {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 2.8rem);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 0.5rem;
  color: #fff;
}

.hero-title-ja {
  font-size: clamp(1.1rem, 3vw, 1.4rem);
  font-weight: 400;
  color: var(--text-muted);
  margin-bottom: 2rem;
}

.hero-desc {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 560px;
  margin-bottom: 0.5rem;
}

/* ── Section headings ── */
.section-label {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 0.3rem;
}

.section-title-ja {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
}

/* ── Services ── */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.service-card {
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5rem;
  transition: border-color 0.2s;
}

.service-card:hover {
  border-color: var(--accent-dim);
}

.service-card .en {
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 0.25rem;
}

.service-card .ja {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.service-card .desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ── About ── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem 3rem;
  margin-top: 2.5rem;
}

.about-grid--slim {
  grid-template-columns: 1fr;
  max-width: 300px;
}

@media (max-width: 520px) {
  .about-grid {
    grid-template-columns: 1fr;
  }
}

.about-row {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
}

.about-row .label {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.2rem;
}

.about-row .label-ja {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.about-row .value-en {
  font-size: 0.95rem;
  color: #fff;
}

.about-row .value-ja {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ── Footer ── */
footer {
  padding: 2.5rem 0;
  border-top: 1px solid var(--border);
}

footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

footer .copy {
  font-size: 0.8rem;
  color: var(--text-muted);
}

footer .location {
  font-size: 0.8rem;
  color: var(--text-muted);
}