:root {
  --bg: #0f1420;
  --bg-elev: #171d2b;
  --bg-card: #1b2233;
  --border: #2a3347;
  --text: #e6ebf5;
  --text-dim: #97a3b8;
  --accent: #4f8cff;
  --accent-2: #6ee7b7;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.3);

  --grade-aplus: #16a34a;
  --grade-a: #22c55e;
  --grade-b: #84cc16;
  --grade-c: #eab308;
  --grade-d: #f97316;
  --grade-e: #ef4444;
  --grade-f: #dc2626;

  --sev-critical: #dc2626;
  --sev-high: #f97316;
  --sev-medium: #eab308;
  --sev-low: #60a5fa;
  --sev-info: #94a3b8;
  --sev-good: #22c55e;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: radial-gradient(1200px 600px at 50% -200px, #1c2740 0%, var(--bg) 60%);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.55;
  min-height: 100vh;
}

.container { max-width: 960px; margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(15, 20, 32, 0.7);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 10;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 16px 20px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark { font-size: 28px; }
.brand h1 { margin: 0; font-size: 22px; letter-spacing: -0.02em; }
.tagline { margin: 0; color: var(--text-dim); font-size: 13px; }
.gh-link { color: var(--text-dim); text-decoration: none; font-size: 14px; }
.gh-link:hover { color: var(--text); }

/* Intro */
.intro { padding: 40px 0 16px; }
.intro h2 { font-size: 26px; margin: 0 0 8px; letter-spacing: -0.02em; }
.intro p { color: var(--text-dim); max-width: 640px; }

/* Card */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px;
  box-shadow: var(--shadow);
}

/* Form */
.scan-form { margin-bottom: 24px; }
.field-label { display: block; font-weight: 600; margin-bottom: 8px; }
.hint { color: var(--text-dim); font-weight: 400; font-size: 13px; }
textarea {
  width: 100%;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  padding: 12px 14px;
  font-family: "SFMono-Regular", ui-monospace, Menlo, Consolas, monospace;
  font-size: 14px;
  resize: vertical;
}
textarea:focus { outline: none; border-color: var(--accent); }
.form-row { display: flex; align-items: center; justify-content: space-between; margin-top: 14px; gap: 16px; }
.checkbox { display: flex; align-items: center; gap: 8px; color: var(--text-dim); font-size: 14px; cursor: pointer; }
.btn-primary {
  background: linear-gradient(180deg, var(--accent) 0%, #3d76e0 100%);
  color: white;
  border: none;
  border-radius: 10px;
  padding: 11px 24px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.05s ease, opacity 0.2s ease;
}
.btn-primary:hover { opacity: 0.92; }
.btn-primary:active { transform: translateY(1px); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }
.form-error { color: var(--sev-high); margin: 12px 0 0; font-size: 14px; }

/* Status */
.status-panel { display: flex; align-items: center; gap: 12px; padding: 16px 0; color: var(--text-dim); }
.spinner {
  width: 20px; height: 20px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Results */
.results { display: flex; flex-direction: column; gap: 18px; padding-bottom: 60px; }

.result-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 14px; overflow: hidden; box-shadow: var(--shadow); }
.result-head { display: flex; align-items: center; gap: 18px; padding: 20px 22px; cursor: pointer; }
.grade-badge {
  width: 62px; height: 62px; min-width: 62px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 26px; font-weight: 800; color: #06210f;
}
.grade-A\+ { background: var(--grade-aplus); color: #eafff1; }
.grade-A { background: var(--grade-a); }
.grade-B { background: var(--grade-b); }
.grade-C { background: var(--grade-c); }
.grade-D { background: var(--grade-d); color: #fff; }
.grade-E { background: var(--grade-e); color: #fff; }
.grade-F { background: var(--grade-f); color: #fff; }

.result-title { flex: 1; min-width: 0; }
.result-title h3 { margin: 0; font-size: 18px; word-break: break-all; }
.result-meta { color: var(--text-dim); font-size: 13px; margin-top: 2px; }
.score-big { text-align: right; }
.score-big .num { font-size: 30px; font-weight: 800; }
.score-big .den { color: var(--text-dim); font-size: 14px; }
.cache-tag { display: inline-block; font-size: 11px; color: var(--text-dim); border: 1px solid var(--border); border-radius: 6px; padding: 1px 6px; margin-left: 8px; vertical-align: middle; }
.caret { color: var(--text-dim); transition: transform 0.2s ease; }
.result-card.open .caret { transform: rotate(90deg); }

.result-body { display: none; padding: 0 22px 22px; border-top: 1px solid var(--border); }
.result-card.open .result-body { display: block; }

.error-banner { color: var(--sev-high); padding: 14px 22px; border-top: 1px solid var(--border); font-size: 14px; }

.section-title { font-size: 13px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-dim); margin: 22px 0 10px; }

/* Breakdown bars */
.bars { display: grid; gap: 10px; }
.bar-row { display: grid; grid-template-columns: 130px 1fr 42px; align-items: center; gap: 12px; font-size: 14px; }
.bar-track { background: var(--bg-elev); border-radius: 6px; height: 10px; overflow: hidden; }
.bar-fill { height: 100%; border-radius: 6px; background: linear-gradient(90deg, var(--accent), var(--accent-2)); }
.bar-val { text-align: right; color: var(--text-dim); font-variant-numeric: tabular-nums; }

/* Key-value grid */
.kv { display: grid; grid-template-columns: max-content 1fr; gap: 6px 18px; font-size: 14px; }
.kv dt { color: var(--text-dim); }
.kv dd { margin: 0; word-break: break-word; }
.pill { display: inline-block; padding: 1px 8px; border-radius: 20px; font-size: 12px; font-weight: 600; }
.pill.ok { background: rgba(34,197,94,0.15); color: #4ade80; }
.pill.bad { background: rgba(220,38,38,0.15); color: #f87171; }
.pill.warn { background: rgba(234,179,8,0.15); color: #facc15; }

/* Protocols */
.proto-list { display: flex; flex-wrap: wrap; gap: 8px; }
.proto {
  padding: 6px 12px; border-radius: 8px; font-size: 13px; font-weight: 600;
  border: 1px solid var(--border);
}
.proto.yes-secure { background: rgba(34,197,94,0.14); border-color: rgba(34,197,94,0.4); color: #86efac; }
.proto.yes-insecure { background: rgba(249,115,22,0.14); border-color: rgba(249,115,22,0.4); color: #fdba74; }
.proto.no { color: var(--text-dim); opacity: 0.65; }

/* Cipher table */
.cipher-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.cipher-table th { text-align: left; color: var(--text-dim); font-weight: 500; padding: 6px 10px; border-bottom: 1px solid var(--border); }
.cipher-table td { padding: 6px 10px; border-bottom: 1px solid rgba(42,51,71,0.5); font-family: ui-monospace, Menlo, monospace; }
.cipher-name { word-break: break-all; }

/* Findings */
.findings { display: grid; gap: 8px; }
.finding { display: flex; gap: 10px; align-items: flex-start; padding: 10px 12px; border-radius: 10px; background: var(--bg-elev); border-left: 3px solid var(--sev-info); }
.finding.critical { border-left-color: var(--sev-critical); }
.finding.high { border-left-color: var(--sev-high); }
.finding.medium { border-left-color: var(--sev-medium); }
.finding.low { border-left-color: var(--sev-low); }
.finding.good { border-left-color: var(--sev-good); }
.finding .f-title { font-weight: 600; }
.finding .f-detail { color: var(--text-dim); font-size: 13px; }
.sev-dot { font-size: 12px; text-transform: uppercase; letter-spacing: 0.04em; font-weight: 700; min-width: 66px; }
.sev-dot.critical { color: var(--sev-critical); }
.sev-dot.high { color: var(--sev-high); }
.sev-dot.medium { color: var(--sev-medium); }
.sev-dot.low { color: var(--sev-low); }
.sev-dot.info { color: var(--sev-info); }
.sev-dot.good { color: var(--sev-good); }

/* Footer */
.site-footer { border-top: 1px solid var(--border); padding: 24px 0; color: var(--text-dim); font-size: 13px; }

@media (max-width: 560px) {
  .bar-row { grid-template-columns: 96px 1fr 38px; }
  .result-head { gap: 12px; padding: 16px; }
  .score-big .num { font-size: 24px; }
}