:root {
  color-scheme: dark;
  --bg: #03111f;
  --panel: rgba(5, 29, 48, 0.82);
  --panel-strong: #071d30;
  --line: rgba(78, 228, 242, 0.38);
  --cyan: #4ee4f2;
  --mint: #75f3bd;
  --gold: #ffc759;
  --text: #e9fbff;
  --muted: #9ebdca;
  --shadow: 0 0 30px rgba(41, 208, 226, 0.1);
  font-family: ui-monospace, "SFMono-Regular", "Roboto Mono", "Noto Sans Mono CJK JP", "Noto Sans JP", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; min-height: 100vh; color: var(--text); background: radial-gradient(circle at 50% 22%, #0a2942 0, var(--bg) 42%, #020a12 100%); line-height: 1.8; }
a { color: var(--cyan); text-underline-offset: 0.22em; }
a:hover { color: var(--mint); }
.skip-link { position: fixed; z-index: 100; top: 0.75rem; left: 0.75rem; padding: 0.6rem 1rem; color: var(--bg); background: var(--mint); transform: translateY(-150%); }
.skip-link:focus { transform: translateY(0); }
.stars { position: fixed; z-index: -1; inset: 0; opacity: 0.55; background-image: radial-gradient(circle, rgba(225, 250, 255, 0.8) 0 1px, transparent 1.5px), radial-gradient(circle, rgba(78, 228, 242, 0.65) 0 1px, transparent 1.5px); background-size: 89px 89px, 137px 137px; background-position: 14px 7px, 52px 39px; }
.site-header { width: min(1180px, calc(100% - 2rem)); margin: 0 auto; min-height: 84px; display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; min-height: 44px; align-items: center; gap: 0.7rem; color: var(--text); font-weight: 800; letter-spacing: 0.08em; text-decoration: none; }
.brand-mark { width: 7px; height: 30px; background: var(--cyan); box-shadow: 0 0 14px var(--cyan); }
nav { display: flex; flex-wrap: wrap; gap: 1.4rem; }
nav a { display: inline-flex; min-width: 44px; min-height: 44px; align-items: center; justify-content: center; color: var(--muted); font-size: 0.86rem; font-weight: 700; letter-spacing: 0.08em; text-decoration: none; }
nav a[aria-current="page"] { color: var(--mint); }
main { width: min(1180px, calc(100% - 2rem)); margin: 0 auto; }
.hud-panel { position: relative; border: 1px solid var(--line); background: linear-gradient(145deg, rgba(9, 36, 58, 0.91), rgba(3, 19, 33, 0.91)); box-shadow: var(--shadow), inset 0 0 50px rgba(45, 211, 226, 0.025); }
.hud-panel::before, .hud-panel::after { content: ""; position: absolute; width: 26px; height: 26px; pointer-events: none; }
.hud-panel::before { top: 10px; left: 10px; border-top: 2px solid var(--cyan); border-left: 2px solid var(--cyan); }
.hud-panel::after { right: 10px; bottom: 10px; border-right: 2px solid var(--cyan); border-bottom: 2px solid var(--cyan); }
.hero { min-height: 620px; margin-top: 3rem; padding: clamp(2rem, 6vw, 5rem); display: grid; grid-template-columns: 1.12fr 0.88fr; align-items: center; gap: 3rem; overflow: hidden; }
.directory-hero { min-height: 430px; padding: clamp(4rem, 10vw, 8rem) 0 clamp(2rem, 5vw, 4rem); display: flex; flex-direction: column; justify-content: center; }
.directory-hero h1 { max-width: 850px; }
.eyebrow { margin: 0 0 1rem; color: var(--mint); font-size: 0.78rem; font-weight: 800; letter-spacing: 0.16em; }
h1, h2, h3, p { overflow-wrap: anywhere; }
h1 { margin: 0; font-size: clamp(2.5rem, 7vw, 5.8rem); line-height: 1.12; letter-spacing: -0.04em; }
h1 span { color: var(--cyan); text-shadow: 0 0 18px rgba(78, 228, 242, 0.33); }
.lead { max-width: 44rem; margin: 2rem 0 0; color: var(--muted); font-family: system-ui, -apple-system, "Noto Sans JP", sans-serif; font-size: clamp(1rem, 2vw, 1.15rem); }
.actions { display: flex; flex-wrap: wrap; gap: 0.9rem; margin-top: 2.2rem; }
.button { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; padding: 0.7rem 1.2rem; border: 1px solid var(--line); color: var(--text); background: rgba(5, 30, 49, 0.74); font-weight: 800; text-decoration: none; box-shadow: inset 0 0 20px rgba(78, 228, 242, 0.04); }
.button:hover { color: var(--bg); background: var(--mint); border-color: var(--mint); }
.button.primary { color: #00121d; background: var(--cyan); border-color: var(--cyan); }
.button.primary:hover { background: var(--mint); }
.platform { margin-top: 1.3rem; color: var(--gold); font-size: 0.74rem; letter-spacing: 0.1em; }
.radar { position: relative; width: min(100%, 420px); aspect-ratio: 1; margin: auto; display: grid; place-items: center; border-radius: 50%; background: radial-gradient(circle, rgba(77, 228, 242, 0.11), transparent 62%); }
.radar-ring { position: absolute; border: 1px solid var(--line); border-radius: 50%; }
.ring-one { inset: 6%; border-color: rgba(78, 228, 242, 0.65); }
.ring-two { inset: 22%; border-style: dashed; }
.ring-three { inset: 38%; border-color: var(--mint); box-shadow: 0 0 20px rgba(117, 243, 189, 0.14); }
.rescue-signal { position: relative; width: 76px; height: 128px; filter: drop-shadow(0 0 12px rgba(117, 243, 189, 0.55)); }
.signal-head { position: absolute; top: 3px; left: 26px; width: 25px; height: 25px; border-radius: 50%; background: var(--gold); }
.signal-body { position: absolute; top: 32px; left: 21px; width: 34px; height: 54px; border-radius: 15px 15px 8px 8px; background: var(--mint); }
.signal-skirt { position: absolute; top: 70px; left: 6px; width: 64px; height: 48px; clip-path: polygon(30% 0, 70% 0, 100% 100%, 0 100%); background: var(--cyan); }
.orbit-dot { position: absolute; top: 17%; right: 18%; width: 12px; height: 12px; border-radius: 50%; background: var(--gold); box-shadow: 0 0 14px var(--gold); }
.radar > p { position: absolute; bottom: 8%; color: var(--cyan); font-size: 0.75rem; letter-spacing: 0.12em; white-space: nowrap; }
.section { padding: clamp(4rem, 9vw, 7rem) 0; }
.section-heading { max-width: 760px; margin-bottom: 2.5rem; }
h2 { margin: 0; font-size: clamp(1.7rem, 4vw, 3rem); line-height: 1.35; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.feature-card { position: relative; min-height: 260px; padding: 2rem; border: 1px solid var(--line); background: var(--panel); }
.feature-number { color: var(--gold); font-size: 0.78rem; }
.feature-card h3 { color: var(--cyan); font-size: 1.45rem; letter-spacing: 0.12em; }
.feature-card p, .status-section p, .contact-card p { color: var(--muted); font-family: system-ui, -apple-system, "Noto Sans JP", sans-serif; }
.app-directory { padding-top: 2rem; }
.app-card { min-height: 260px; padding: clamp(2rem, 5vw, 4rem); display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 2rem; }
.app-card h3 { margin: 0.25rem 0 1rem; color: var(--cyan); font-size: clamp(2rem, 5vw, 3.8rem); line-height: 1.2; }
.app-card p:not(.eyebrow) { max-width: 690px; color: var(--muted); font-family: system-ui, -apple-system, "Noto Sans JP", sans-serif; }
.status-section, .contact-card { padding: clamp(2rem, 5vw, 4rem); display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2rem; }
.vertical-actions { flex-direction: column; margin: 0; min-width: 240px; }
footer { width: min(1180px, calc(100% - 2rem)); margin: 6rem auto 0; padding: 2rem 0 3rem; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1rem; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.78rem; }
footer a { display: inline-flex; min-height: 44px; align-items: center; }
.copyright { width: 100%; margin: 0; opacity: 0.7; }
.subpage { max-width: 980px; }
.page-heading { margin-top: 3rem; padding: clamp(2rem, 5vw, 4rem); }
.page-heading h1 { font-size: clamp(2.2rem, 7vw, 4.6rem); }
.page-heading > p:last-child { color: var(--muted); }
.compact-section { padding-bottom: 3rem; }
.faq-list { display: grid; gap: 0.8rem; }
details { border: 1px solid var(--line); background: var(--panel); }
summary { position: relative; padding: 1.3rem 3.2rem 1.3rem 1.4rem; cursor: pointer; color: var(--text); font-weight: 800; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; position: absolute; right: 1.4rem; color: var(--cyan); font-size: 1.5rem; line-height: 1; }
details[open] summary::after { content: "−"; }
details div { padding: 0 1.4rem 1.3rem; color: var(--muted); font-family: system-ui, -apple-system, "Noto Sans JP", sans-serif; }
details p { margin: 0; }
.contact-card { margin-bottom: 4rem; }
.contact-data { margin: 1.5rem 0 0; }
.contact-data div { display: grid; grid-template-columns: 9rem 1fr; padding: 0.7rem 0; border-top: 1px solid rgba(78, 228, 242, 0.18); }
.contact-data dt { color: var(--mint); font-size: 0.78rem; }
.contact-data dd { margin: 0; color: var(--text); }
.policy { margin: 2rem 0 4rem; padding: clamp(2rem, 5vw, 4rem); font-family: system-ui, -apple-system, "Noto Sans JP", sans-serif; }
.policy h2 { margin-top: 2.6rem; color: var(--cyan); font-family: ui-monospace, "SFMono-Regular", monospace; font-size: clamp(1.25rem, 3vw, 1.65rem); }
.policy p { color: #c5dbe3; }
.policy a[href^="mailto:"] { display: inline-flex; min-height: 44px; align-items: center; }
:focus-visible { outline: 3px solid var(--gold); outline-offset: 4px; }

@media (max-width: 800px) {
  .site-header { padding: 1.1rem 0; align-items: flex-start; flex-direction: column; }
  nav { gap: 1rem; }
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .radar { width: min(86vw, 390px); }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card { min-height: 0; }
  .app-card { grid-template-columns: 1fr; }
  .status-section, .contact-card { grid-template-columns: 1fr; }
  .vertical-actions { min-width: 0; }
  .contact-data div { grid-template-columns: 1fr; gap: 0.2rem; }
}

@media (max-width: 420px) {
  .site-header, main, footer { width: min(100% - 1.25rem, 1180px); }
  .brand { font-size: 0.9rem; }
  .hero { padding-inline: 2rem; }
  .directory-hero { padding-inline: 0.4rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}