:root {
  color-scheme: dark;
  --bg: #0f0f0f;
  --surface: #181818;
  --surface-strong: #232323;
  --text: #f4f4f4;
  --muted: #aaaaaa;
  --accent: #ffffff;
  --border: rgba(255, 255, 255, 0.1);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  font-family: "Noto Sans JP", "Helvetica Neue", Arial, sans-serif;
  background: radial-gradient(circle at top, #1a1a1a 0%, #0b0b0b 60%);
  color: var(--text);
}

body {
  line-height: 1.7;
}

img {
  max-width: 100%;
  display: block;
}

/* Hide text input caret and disable accidental text selection across the site,
   while keeping links interactive. */
/* Allow text selection for copying, but keep cursor as default (no I-beam).
   Links remain interactive and show pointer cursor. */
html, body, h1, h2, h3, p, .brand-name, .card, .about-grid, .cards {
  -webkit-user-select: text;
  -moz-user-select: text;
  -ms-user-select: text;
  user-select: text;
  cursor: default;
}

/* Keep links and actionable elements showing pointer cursor */
.site-nav a,
a,
.contact-mail {
  cursor: pointer;
}

.container {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(14px);
  background: rgba(15, 15, 15, 0.88);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.header-inner,
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
}

.brand {
  display: grid;
  gap: 6px;
}

.brand-name {
  font-size: clamp(1.5rem, 2vw, 2.2rem);
  font-weight: 700;
  letter-spacing: 0.04em;
}

.brand-tag {
  color: var(--muted);
  font-size: 0.95rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
}

.site-nav a:hover {
  color: var(--accent);
}

.hero {
  padding: 120px 0 80px;
}

.hero-content {
  display: flex;
  justify-content: center;
}

.hero-media {
  position: relative;
  width: 100%;
  max-width: 860px;
}

.hero-image {
  width: 100%;
  display: block;
  border-radius: 24px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 32px 80px rgba(0, 0, 0, 0.28);
}

/* Product card: smaller image and title centered */
.product-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.product-image {
  width: 320px;
  max-width: 100%;
  border-radius: 12px;
  display: block;
  border: 1px solid rgba(255,255,255,0.08);
}

.product-title {
  color: var(--text);
  font-weight: 600;
  font-size: 1.05rem;
  text-align: center;
}

.section {
  padding: 70px 0;
}

.section h2 {
  margin: 0 0 24px;
  font-size: clamp(1.8rem, 2.5vw, 2.4rem);
}

.cards {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 28px;
}

.card h3 {
  margin: 0 0 12px;
  font-size: 1.2rem;
}

.card p {
  margin: 0;
  color: var(--muted);
}

.about-grid {
  display: grid;
  gap: 22px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.about-grid h3 {
  margin: 0 0 10px;
  font-size: 1rem;
}

.about-grid p {
  margin: 0;
  color: var(--muted);
}

.contact-section p {
  margin: 0 0 16px;
  color: var(--muted);
}

.contact-mail {
  display: inline-block;
  padding: 18px 22px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  font-weight: 500;
}

.policy-content {
  max-width: 840px;
}

.policy-content h1 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  margin: 0 0 28px;
}

.policy-content h2 {
  font-size: 1.35rem;
  margin: 40px 0 14px;
}

.policy-content h3 {
  font-size: 1.05rem;
  margin: 24px 0 10px;
  color: var(--text);
}

.policy-content p {
  color: var(--muted);
  margin: 0 0 16px;
}

.policy-content ul,
.policy-content ol {
  color: var(--muted);
  margin: 0 0 16px;
  padding-left: 1.4em;
}

.policy-content li {
  margin-bottom: 6px;
}

.policy-content a {
  color: var(--text);
}

.policy-date {
  margin-top: 40px;
  font-size: 0.9rem;
}

.site-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.site-footer p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.footer-note {
  margin-top: 10px;
  color: #b1b1b1;
  font-size: 0.85rem;
}

@media (max-width: 720px) {
  .header-inner,
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }

  .site-nav {
    gap: 16px;
    flex-wrap: wrap;
  }

  .hero {
    padding: 90px 0 60px;
  }
}