* {
  box-sizing: border-box;
}
:root {
  --bg: #0b0c10;
  --fg: #f5f7fa;
  --muted: #a3aab7;
  --brand: #ffffff;
  --accent: #6ee7ff;
  --card: #14161a;
  --card-border: #1f232b;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Inter", "Noto Sans JP", system-ui, -apple-system, Segoe UI,
    Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  line-height: 1.6;
}

.container {
  width: min(1100px, 92%);
  margin: 0 auto;
}

a {
  color: var(--fg);
  text-decoration: none;
}
a:hover {
  opacity: 0.9;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  border-bottom: 1px solid var(--card-border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}
.brand {
  display: inline-flex;
  gap: 10px;
  align-items: center;
}
.logo {
  width: 28px;
  height: 28px;
}
.brand-text {
  font-weight: 800;
  letter-spacing: 0.06em;
}

.nav {
  display: flex;
  gap: 20px;
  align-items: center;
}
.nav .cta {
  padding: 6px 12px;
  border: 1px solid var(--card-border);
  border-radius: 999px;
}
.hamburger {
  display: none;
  background: none;
  border: 0;
  font-size: 22px;
  color: var(--fg);
}

.hero {
  padding: clamp(64px, 12vw, 140px) 0 clamp(48px, 8vw, 100px);
  background: radial-gradient(
    60% 60% at 50% 20%,
    rgba(110, 231, 255, 0.12),
    rgba(0, 0, 0, 0) 60%
  );
  text-align: left;
}
.hero-eyebrow {
  margin: 0;
  font-weight: 600;
  font-size: clamp(28px, 6vw, 60px);
  color: var(--muted);
}
.hero-title {
  margin: -8px 0 0;
  font-size: clamp(48px, 12vw, 140px);
  line-height: 0.95;
  font-weight: 800;
}

.section {
  padding: clamp(40px, 8vw, 100px) 0;
}
.section.alt {
  background: linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0.02),
    rgba(0, 0, 0, 0) 40%
  );
}
.section-title {
  font-size: 28px;
  font-weight: 700;
  margin: 0 0 16px;
}

.two-col {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 26px;
  align-items: center;
}
@media (max-width: 900px) {
  .two-col {
    grid-template-columns: 1fr;
  }
  .nav {
    display: none;
  }
  .hamburger {
    display: inline-block;
  }
}
.jp-lg {
  font-family: "Noto Sans JP", sans-serif;
  font-size: 22px;
  font-weight: 700;
  margin: 8px 0 10px;
}
.muted {
  color: var(--muted);
}

.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  overflow: hidden;
}
.card img {
  display: block;
  width: 100%;
  height: auto;
}

.product-title {
  font-size: 22px;
  font-weight: 700;
  margin: 0 0 8px;
}
.bullets {
  margin: 10px 0 0 18px;
  padding: 0;
}
.bullets li {
  margin: 6px 0;
}

.kv {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 10px 18px;
}
.kv dt {
  color: var(--muted);
}
.kv dd {
  margin: 0;
}

.contact-mail a {
  border-bottom: 1px dotted var(--muted);
}

.site-footer {
  border-top: 1px solid var(--card-border);
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
}
.back-to-top {
  font-size: 14px;
  color: var(--muted);
}

/* ==== Mission video section ==== */
.mission-video {
  position: relative;
  padding: 0;
  min-height: 38vh;
  display: grid;
  align-items: stretch;
  isolation: isolate;
  overflow: hidden;
  background: #fff;
}
#product {
  background-image: url("/static/img/product.png");
	background-repeat: no-repeat;
}
.mission-video::before {
  content: "";
  position: absolute;
  inset: 0 50% 0 0;
  background: #ffffff;
  z-index: 2;
  clip-path: polygon(0 0, 62% 0, 42% 100%, 0 100%);
}

.video-wrap {
  position: absolute;
  inset: 0;
  z-index: 1;
}
.bg-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}

.mission-overlay {
  position: relative;
  z-index: 3;
  display: grid;
  gap: clamp(18px, 4vw, 36px);
  padding: clamp(24px, 6vw, 48px) 0 clamp(28px, 8vw, 72px);
  height: 10vw;
}
.mission-overlay .tag {
  display: inline-block;
  background: rgba(0, 0, 0, 0.95);
  color: #fff;
  font-weight: 700;
  font-size: clamp(16px, 2.4vw, 22px);
  padding: 10px 16px;
  margin-left: clamp(12px, 2vw, 24px);
  letter-spacing: 0.02em;
}
.mission-overlay .headline {
  display: inline-block;
  max-width: min(920px, 92%);
  margin-left: clamp(24px, 4vw, 50px);
}
.mission-overlay .headline .line {
  display: inline-block;
  background: rgba(0, 0, 0, 0.95);
  color: #fff;
  padding: 16px 18px;
  font-weight: 700;
  font-size: clamp(32px, 6.5vw, 64px);
  line-height: 1.1;
}
.mission-overlay .headline .line + .line {
  margin-top: 10px;
}
.mission-overlay .headline .line.sub {
  font-weight: 600;
  font-size: clamp(20px, 4.3vw, 40px);
}

@media (max-width: 760px) {
  .mission-video::before {
    clip-path: polygon(0 0, 85% 0, 65% 100%, 0 100%);
  }
  .mission-overlay .headline {
    margin-left: clamp(14px, 3vw, 24px);
  }
}