:root {
  --ink: #0b1a30;
  --ink-2: #0f2444;
  --paper: #f5f7fa;
  --card: #ffffff;
  --line: #e4e9f0;
  --text: #1c2a3a;
  --muted: #5b6b80;
  --accent: #2f7bf6;
  --cyan: #35c6f4;
  --mono: 'JetBrains Mono', Consolas, monospace;
  --display: 'Space Grotesk', 'Noto Sans JP', system-ui, sans-serif;
  --body: 'Inter', 'Noto Sans JP', system-ui, sans-serif;
  --g-aplus: #12a150;
  --g-a: #2ba24c;
  --g-b: #8fa61b;
  --g-c: #d19b12;
  --g-d: #e07b1f;
  --g-e: #d94f27;
  --g-f: #d62f2f;
}

* { box-sizing: border-box; margin: 0; }

body {
  font-family: var(--body);
  background: var(--paper);
  color: var(--text);
  line-height: 1.55;
}

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }
.hidden { display: none !important; }

/* ---- header / hero ---- */

.site-head {
  background: var(--ink);
  background-image: radial-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 22px 22px;
  color: #fff;
  padding-bottom: 52px;
  border-bottom: 3px solid var(--accent);
}

.head-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 18px;
  padding-bottom: 8px;
}

.brand { display: flex; align-items: center; text-decoration: none; }
.brand-logo { height: 32px; width: auto; display: block; }

.nav { display: flex; align-items: center; }
.nav a {
  color: #c8d4e8;
  text-decoration: none;
  margin-left: 22px;
  font-size: 0.95rem;
}
.nav a:hover, .nav a:focus-visible { color: #fff; }

.lang-toggle {
  margin-left: 22px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #c8d4e8;
  font-family: var(--body);
  font-size: 0.82rem;
  padding: 5px 10px;
  border-radius: 7px;
  cursor: pointer;
}
.lang-toggle:hover { background: rgba(255, 255, 255, 0.16); color: #fff; }
.lang-toggle .sep { margin: 0 6px; opacity: 0.4; }
.lang-toggle [data-lang].active { color: #fff; font-weight: 600; }

.hero { text-align: center; padding-top: 44px; }
.hero h1 {
  font-family: var(--display);
  font-size: clamp(1.9rem, 4.8vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.5px;
}
.hero-sub { color: #a9bad2; margin: 12px auto 26px; max-width: 520px; }

.scan-bar {
  display: flex;
  max-width: 580px;
  margin: 0 auto;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
}
.scan-bar input {
  flex: 1;
  min-width: 0;
  border: 0;
  padding: 16px 18px;
  font-size: 1rem;
  font-family: var(--mono);
}
.scan-bar input:focus { outline: 2px solid var(--cyan); outline-offset: -2px; }
.scan-bar button {
  position: relative;
  border: 0;
  background: var(--accent);
  color: #fff;
  font-family: var(--display);
  font-weight: 700;
  font-size: 1rem;
  padding: 0 32px;
  cursor: pointer;
  transition: background 0.15s;
}
.scan-bar button:hover { background: #3d88ff; }
.scan-bar button.is-scanning { background: var(--ink-2); }
.scan-bar button.is-scanning::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 3px;
  background: var(--cyan);
  animation: btnbar 0.9s ease-in-out infinite;
}
@keyframes btnbar { 0% { transform: scaleX(0); transform-origin: left; } 50% { transform: scaleX(1); transform-origin: left; } 100% { transform: scaleX(0); transform-origin: right; } }

.scan-opts { margin-top: 14px; font-size: 0.9rem; color: #a9bad2; }
.scan-opts label { margin: 0 12px; cursor: pointer; }

.feature-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin: 26px auto 0;
  padding: 0;
  list-style: none;
  max-width: 700px;
}
.feature-chips li {
  font-size: 0.76rem;
  color: #c8d4e8;
  border: 1px solid rgba(255, 255, 255, 0.16);
  padding: 5px 13px;
  border-radius: 999px;
}

/* ---- result ---- */

.result { margin-top: -30px; }

.result-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 26px 28px;
}

.result-top { display: flex; gap: 26px; align-items: center; flex-wrap: wrap; }

.grade-stamp {
  font-family: var(--display);
  font-weight: 700;
  font-size: 3.2rem;
  width: 104px;
  height: 104px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  flex-shrink: 0;
}

.result-meta h2 { font-family: var(--display); font-size: 1.35rem; word-break: break-all; }
.result-meta p { color: var(--muted); font-size: 0.92rem; margin-top: 4px; }

.result-error {
  background: #fdf0f0;
  border: 1px solid #f0c9c9;
  color: #8f2323;
  border-radius: 12px;
  padding: 16px 20px;
}

.headers-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 24px; }

.hcard { border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; }
.hcard .hname { font-family: var(--mono); font-weight: 600; font-size: 0.9rem; }
.hcard.ok { border-left: 3px solid var(--g-a); }
.hcard.ok .hname::before { content: '✓ '; color: var(--g-a); }
.hcard.miss { background: #fdf6f6; border-color: #eccfcf; border-left: 3px solid var(--g-f); }
.hcard.miss .hname::before { content: '✗ '; color: var(--g-f); }
.hcard .hvalue {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--muted);
  margin-top: 6px;
  word-break: break-all;
  max-height: 60px;
  overflow: hidden;
}
.hcard .hwhy { font-size: 0.82rem; color: var(--muted); margin-top: 6px; }

.notes { margin-top: 18px; }
.notes li { margin-left: 20px; font-size: 0.9rem; color: #8a5a10; }

.raw-block {
  margin-top: 22px;
  background: var(--ink);
  color: #cfe0f5;
  font-family: var(--mono);
  font-size: 0.8rem;
  border-radius: 10px;
  padding: 18px 20px;
  overflow-x: auto;
  white-space: pre;
}
.raw-block .rk { color: var(--cyan); }

/* ---- scan animation ---- */

.scanning-card { display: flex; align-items: center; gap: 28px; }
.radar {
  position: relative;
  width: 108px;
  height: 108px;
  border-radius: 50%;
  flex-shrink: 0;
  border: 1px solid rgba(53, 198, 244, 0.35);
  background:
    radial-gradient(circle, rgba(53, 198, 244, 0.1), transparent 70%),
    repeating-radial-gradient(circle, transparent 0, transparent 16px, rgba(53, 198, 244, 0.14) 17px);
  overflow: hidden;
}
.radar-sweep {
  position: absolute;
  inset: -2px;
  border-radius: 50%;
  background: conic-gradient(from 0deg, transparent 0deg, transparent 270deg, rgba(53, 198, 244, 0.55) 360deg);
  animation: sweep 1.3s linear infinite;
}
@keyframes sweep { to { transform: rotate(360deg); } }
.radar-core {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--display);
  font-weight: 700;
  font-size: 2.2rem;
  color: var(--accent);
}
.scanning-body { flex: 1; min-width: 0; }
.scanning-title { font-family: var(--display); font-size: 1.15rem; font-weight: 700; }
.scanning-host { color: var(--accent); word-break: break-all; }
.scanning-sub { color: var(--muted); font-size: 0.88rem; margin: 2px 0 14px; }
.scan-lines { display: grid; gap: 2px; }
.scan-line { display: flex; align-items: center; gap: 10px; padding: 3px 0; opacity: 0.28; animation: linepulse 1.5s ease-in-out infinite; }
@keyframes linepulse { 0%, 100% { opacity: 0.28; } 50% { opacity: 1; } }
.scan-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--cyan); flex-shrink: 0; }
.scan-name { font-family: var(--mono); font-size: 0.82rem; color: var(--text); }

/* ---- osint recon ---- */

.osint { margin-top: 18px; }

.osint-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 24px 28px;
}
.osint-head { display: flex; align-items: baseline; gap: 12px; margin-bottom: 18px; }
.osint-head h2 { font-family: var(--display); font-size: 1.3rem; }

.osint-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.recon-box {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 16px 18px;
  background: #fbfcfe;
}
.recon-box.span-2 { grid-column: 1 / -1; }
.recon-box h3 { font-family: var(--display); font-size: 1rem; margin-bottom: 10px; }
.recon-box h3 .muted { font-weight: 400; font-size: 0.8rem; }

.kv { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
.kv td { padding: 5px 8px; vertical-align: top; border-bottom: 1px solid #eef2f8; }
.kv tr:last-child td { border-bottom: 0; }
.kv .rk { font-family: var(--mono); color: var(--accent); white-space: nowrap; width: 92px; font-size: 0.78rem; }
.soa { margin-top: 8px; font-size: 0.78rem; font-family: var(--mono); }

.email-cards { display: grid; gap: 8px; }
.email-cards .hcard { padding: 10px 12px; }

.tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.76rem;
  background: #eef2f8;
  color: var(--text);
  padding: 3px 8px;
  border-radius: 6px;
  margin: 0 4px 4px 0;
  word-break: break-all;
}
.tag.link { text-decoration: none; cursor: pointer; }
.tag.link:hover { background: var(--accent); color: #fff; }
.subs { max-height: 210px; overflow-y: auto; }
.muted { color: var(--muted); }

/* ---- panels ---- */

.panels {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 40px 0;
}

.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
}
.panel h2 {
  font-family: var(--display);
  font-size: 1.02rem;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  background: #f8fafd;
}
.panel table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
.panel td { padding: 8px 16px; border-bottom: 1px solid #eef2f8; }
.panel tr:last-child td { border-bottom: 0; }
.panel td.num { text-align: right; font-family: var(--mono); font-size: 0.82rem; }
.panel td.host { word-break: break-all; }
.panel a { color: var(--accent); text-decoration: none; }
.panel a:hover, .panel a:focus-visible { text-decoration: underline; }
.panel .empty { color: var(--muted); font-style: italic; }

.grade-chip { font-family: var(--display); font-weight: 700; font-size: 0.85rem; }

/* ---- how we grade ---- */

.grading { margin: 44px 0; }
.grading h2 { font-family: var(--display); font-size: 1.5rem; margin-bottom: 8px; }
.grading-intro { color: var(--muted); max-width: 660px; margin-bottom: 20px; }
.grade-scale { display: grid; gap: 8px; }
.grade-row {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--card);
  border: 1px solid var(--line);
  border-left-width: 4px;
  border-radius: 10px;
  padding: 12px 16px;
}
.grade-badge {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.1rem;
  width: 46px;
  height: 46px;
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  flex-shrink: 0;
}
.grade-desc { font-size: 0.92rem; }
.grade-row[data-none] { display: none; }

.grade-badge[data-g="A+"], .grade-row:has([data-g="A+"]) { }
.grade-badge[data-g="A+"] { background: var(--g-aplus); }
.grade-badge[data-g="A"] { background: var(--g-a); }
.grade-badge[data-g="B"] { background: var(--g-b); }
.grade-badge[data-g="C"] { background: var(--g-c); }
.grade-badge[data-g="D"] { background: var(--g-d); }
.grade-badge[data-g="E"] { background: var(--g-e); }
.grade-badge[data-g="F"] { background: var(--g-f); }
.grade-row:has([data-g="A+"]) { border-left-color: var(--g-aplus); }
.grade-row:has([data-g="A"]) { border-left-color: var(--g-a); }
.grade-row:has([data-g="B"]) { border-left-color: var(--g-b); }
.grade-row:has([data-g="C"]) { border-left-color: var(--g-c); }
.grade-row:has([data-g="D"]) { border-left-color: var(--g-d); }
.grade-row:has([data-g="E"]) { border-left-color: var(--g-e); }
.grade-row:has([data-g="F"]) { border-left-color: var(--g-f); }

/* ---- prose / footer ---- */

.prose { margin: 44px 0; max-width: 720px; }
.prose h2 { font-family: var(--display); margin-bottom: 10px; }
.prose code { font-family: var(--mono); font-size: 0.85em; background: #e8edf5; padding: 1px 5px; border-radius: 4px; }
.prose pre {
  font-family: var(--mono);
  font-size: 0.85rem;
  background: var(--ink);
  color: #cfe0f5;
  padding: 16px 20px;
  border-radius: 10px;
  overflow-x: auto;
  margin-top: 10px;
}

.site-foot {
  border-top: 1px solid var(--line);
  padding: 22px 0 34px;
  color: var(--muted);
  font-size: 0.88rem;
}

@media (max-width: 900px) {
  .panels { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .headers-grid, .osint-grid { grid-template-columns: 1fr; }
  .recon-box.span-2 { grid-column: auto; }
  .nav a { margin-left: 14px; }
  .result { margin-top: 16px; }
  .scanning-card { flex-direction: column; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  .radar-sweep, .scan-line, .scan-bar button.is-scanning::after { animation: none; }
  .scan-line { opacity: 1; }
}

@media (prefers-reduced-motion: no-preference) {
  .result-card, .osint-card { animation: rise 0.3s ease-out; }
  @keyframes rise { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
}