:root {
  --bg: #0b1220;
  --panel: #121b2e;
  --panel-raised: #17233a;
  --border: #23324d;
  --text: #e6eaf0;
  --muted: #8b95a7;
  --amber: #f2b705;
  --teal: #2dd4bf;
  --red: #ef4444;
  --mono: "IBM Plex Mono", "SFMono-Regular", Consolas, Menlo, monospace;
  --sans: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.5;
}

@media (prefers-reduced-motion: no-preference) {
  a, button, .card, .module-link, .step, .dropzone, .tabbtn, .profile-btn, .chain-node {
    transition: border-color 0.15s ease, background-color 0.15s ease, color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
  }
}

:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

.app-shell {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: 100vh;
}

@media (max-width: 860px) {
  .app-shell { grid-template-columns: 1fr; }
  .rail { display: none; }
}

/* ---------- Rail / stepper ---------- */
.rail {
  background: var(--panel);
  border-right: 1px solid var(--border);
  padding: 28px 20px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.brand {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--amber);
  text-transform: uppercase;
  margin-bottom: 28px;
}

.brand small {
  display: block;
  color: var(--muted);
  font-size: 11px;
  margin-top: 4px;
  letter-spacing: 0.04em;
}

.step {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 10px;
  border-radius: 6px;
  cursor: pointer;
  color: var(--muted);
  border-left: 2px solid transparent;
}

.step:hover { background: var(--panel-raised); }

.step.active {
  color: var(--text);
  background: var(--panel-raised);
  border-left: 2px solid var(--amber);
}

.step.done .step-num { background: var(--teal); color: #06201c; }

.step-num {
  font-family: var(--mono);
  font-size: 12px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 1px;
}

.step-label { font-size: 13.5px; }
.step-desc { font-size: 11.5px; color: var(--muted); margin-top: 2px; }

/* ---------- Module nav (sidebar list linking between top-level pages) ---------- */
.module-nav { display: flex; flex-direction: column; gap: 4px; margin-bottom: 20px; }
.module-link {
  display: block;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--muted);
  text-decoration: none;
  font-size: 12.5px;
}
.module-link:hover { color: var(--text); border-color: var(--teal); }
.module-link.current { color: var(--amber); border-color: var(--amber); }

/* ---------- Security advisory card (shared recommendation format) ---------- */

.advisory-card {
  border: 1px solid var(--border);
  border-left-width: 4px;
  border-radius: 6px;
  padding: 14px 16px;
  margin-bottom: 12px;
  background: var(--bg);
}
.advisory-card.critical { border-left-color: var(--red); }
.advisory-card.high { border-left-color: var(--amber); }
.advisory-card.medium { border-left-color: var(--amber); }
.advisory-card.low { border-left-color: var(--muted); }
.advisory-card.info { border-left-color: var(--teal); }

.advisory-card .advisory-head { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.advisory-card .advisory-title { font-size: 14px; font-weight: 600; }
.advisory-card dl { display: grid; grid-template-columns: 130px 1fr; gap: 6px 10px; font-size: 12.5px; margin: 0; }
.advisory-card dt { color: var(--muted); font-family: var(--mono); }
.advisory-card dd { margin: 0; }
.advisory-card a { color: var(--teal); }

/* ---------- Chain visualization ---------- */

.chain-visual { display: flex; flex-direction: column; align-items: center; gap: 0; margin: 10px 0 20px; }
.chain-node {
  width: 100%;
  max-width: 420px;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  background: var(--bg);
}
.chain-node.role-leaf { border-color: var(--teal); }
.chain-node.role-root { border-color: var(--amber); }
.chain-node.expired { border-color: var(--red); }
.chain-node .role-label {
  font-family: var(--mono); font-size: 10.5px; text-transform: uppercase;
  letter-spacing: 0.05em; color: var(--muted); margin-bottom: 4px;
}
.chain-node .node-cn { font-size: 14px; font-weight: 600; }
.chain-node .node-meta { font-size: 11.5px; color: var(--muted); margin-top: 4px; }
.chain-arrow { color: var(--muted); font-size: 18px; padding: 4px 0; }

.result-banner {
  display: flex; align-items: center; gap: 16px; padding: 16px 20px;
  border-radius: 8px; margin-bottom: 18px; border: 1px solid var(--border);
}
.result-banner .result-status { font-family: var(--mono); font-size: 20px; font-weight: 700; }
.result-banner.pass { border-color: var(--teal); }
.result-banner.pass .result-status { color: var(--teal); }
.result-banner.warning { border-color: var(--amber); }
.result-banner.warning .result-status { color: var(--amber); }
.result-banner.failed { border-color: var(--red); }
.result-banner.failed .result-status { color: var(--red); }

.check-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 8px; }
.check-item { display: flex; justify-content: space-between; padding: 8px 10px; border: 1px solid var(--border); border-radius: 5px; font-size: 12.5px; }
.check-item .check-status { font-family: var(--mono); font-size: 10.5px; text-transform: uppercase; padding: 1px 7px; border-radius: 3px; }
.check-item .check-status.pass { color: var(--teal); border: 1px solid var(--teal); }
.check-item .check-status.warning { color: var(--amber); border: 1px solid var(--amber); }
.check-item .check-status.failed { color: var(--red); border: 1px solid var(--red); }

/* ---------- Print (used for "Export PDF" via browser print-to-PDF) ---------- */
@media print {
  .rail, .topbar, .modal-overlay, .no-print, footer.legal { display: none !important; }
  .card { border: none; padding: 8px 0; }
  body { background: #fff; color: #000; }
  .app-shell { display: block; }
  main { max-width: 100%; padding: 0; }
  .advisory-card, .chain-node, .check-item { break-inside: avoid; }
}

/* ---------- Main ---------- */
main {
  padding: 40px 48px 80px;
  max-width: 880px;
}

@media (max-width: 600px) {
  main { padding: 24px 20px 60px; }
}

.panel {
  display: none;
}
.panel.active { display: block; }

h1 { font-size: 22px; margin: 0 0 6px; }
h2 { font-size: 17px; margin: 0 0 4px; }
.sub { color: var(--muted); font-size: 13.5px; margin: 0 0 24px; }

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 22px;
  margin-bottom: 18px;
}

.field { margin-bottom: 14px; }
.field label {
  display: block;
  font-size: 12.5px;
  color: var(--muted);
  margin-bottom: 6px;
  font-family: var(--mono);
  letter-spacing: 0.02em;
}
.field input[type=text], .field input[type=number], .field select {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 9px 11px;
  border-radius: 5px;
  font-family: var(--sans);
  font-size: 14px;
}
.field input:focus, .field select:focus, button:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 1px;
}

.row { display: flex; gap: 14px; flex-wrap: wrap; }
.row > .field { flex: 1; min-width: 160px; }

.tabbtns { display: flex; gap: 8px; margin-bottom: 16px; }
.tabbtn {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 7px 14px;
  border-radius: 5px;
  cursor: pointer;
  font-size: 13px;
}
.tabbtn.active { color: var(--amber); border-color: var(--amber); }

.dropzone {
  border: 1px dashed var(--border);
  border-radius: 6px;
  padding: 24px;
  text-align: center;
  color: var(--muted);
  font-size: 13.5px;
  cursor: pointer;
}
.dropzone:hover { border-color: var(--teal); color: var(--text); }
.dropzone.filled { border-color: var(--teal); color: var(--text); }

button.primary {
  background: var(--amber);
  color: #241c00;
  border: none;
  padding: 10px 18px;
  border-radius: 5px;
  font-weight: 600;
  cursor: pointer;
  font-size: 14px;
}
button.primary:hover { filter: brightness(1.08); }
button.primary:disabled { opacity: 0.4; cursor: not-allowed; }

button.ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  padding: 10px 18px;
  border-radius: 5px;
  cursor: pointer;
  font-size: 14px;
}
button.ghost:hover { border-color: var(--teal); }

.actions { display: flex; gap: 10px; margin-top: 16px; flex-wrap: wrap; }

.kv { font-family: var(--mono); font-size: 13px; }
.kv-row { display: flex; justify-content: space-between; gap: 12px; padding: 5px 0; border-bottom: 1px solid var(--border); }
.kv-row:last-child { border-bottom: none; }
.kv-row .k { color: var(--muted); }
.kv-row .v { text-align: right; word-break: break-word; }

.status-dot { width: 9px; height: 9px; border-radius: 50%; display: inline-block; margin-right: 8px; }
.status-dot.critical { background: var(--red); }
.status-dot.warning { background: var(--amber); }
.status-dot.info { background: var(--teal); }

.risk-row { display: flex; align-items: flex-start; padding: 10px 0; border-bottom: 1px solid var(--border); font-size: 13.5px; }
.risk-row:last-child { border-bottom: none; }
.risk-row .status-dot { margin-top: 5px; flex-shrink: 0; }

.diff-table { width: 100%; border-collapse: collapse; font-family: var(--mono); font-size: 12.5px; }
.diff-table th, .diff-table td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); }
.diff-table th { color: var(--muted); font-weight: 500; }
.diff-changed { color: var(--amber); }
.diff-added { color: var(--teal); }
.diff-removed { color: var(--red); }

.pem-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px;
  font-family: var(--mono);
  font-size: 11.5px;
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 220px;
  overflow-y: auto;
  margin-top: 10px;
}

.badge {
  font-family: var(--mono);
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 3px;
  border: 1px solid var(--border);
  color: var(--muted);
}
.badge.ok { color: var(--teal); border-color: var(--teal); }
.badge.err { color: var(--red); border-color: var(--red); }

.error-box {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid var(--red);
  color: #fca5a5;
  padding: 10px 12px;
  border-radius: 6px;
  font-size: 13px;
  margin-top: 10px;
}

.notice {
  font-size: 12.5px;
  color: var(--muted);
  margin-top: 6px;
}

.expiry-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 20px;
  border: 1px solid var(--border);
}

footer.legal {
  color: var(--muted);
  font-size: 11.5px;
  margin-top: 40px;
  border-top: 1px solid var(--border);
  padding-top: 14px;
}

/* ---------- TLS Health Check dashboard ---------- */

.dash-header {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.score-gauge {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  border: 4px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  flex-shrink: 0;
  font-family: var(--mono);
}
.score-gauge .grade { font-size: 30px; font-weight: 700; line-height: 1; }
.score-gauge .num { font-size: 11px; color: var(--muted); margin-top: 2px; }
.score-gauge.grade-a { border-color: var(--teal); }
.score-gauge.grade-a .grade { color: var(--teal); }
.score-gauge.grade-b { border-color: var(--teal); }
.score-gauge.grade-b .grade { color: var(--teal); }
.score-gauge.grade-c { border-color: var(--amber); }
.score-gauge.grade-c .grade { color: var(--amber); }
.score-gauge.grade-d, .score-gauge.grade-f { border-color: var(--red); }
.score-gauge.grade-d .grade, .score-gauge.grade-f .grade { color: var(--red); }

.score-breakdown { display: flex; flex-wrap: wrap; gap: 16px; flex: 1; }
.score-item { min-width: 130px; }
.score-item .label { font-size: 11px; color: var(--muted); font-family: var(--mono); }
.score-item .bar { height: 5px; background: var(--border); border-radius: 3px; margin-top: 5px; overflow: hidden; }
.score-item .bar > div { height: 100%; background: var(--teal); }

.section-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 18px;
}

.sev-pill {
  font-family: var(--mono);
  font-size: 10.5px;
  padding: 2px 8px;
  border-radius: 3px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  flex-shrink: 0;
}
.sev-pill.critical { background: rgba(239,68,68,0.15); color: var(--red); border: 1px solid var(--red); }
.sev-pill.high { background: rgba(242,183,5,0.15); color: var(--amber); border: 1px solid var(--amber); }
.sev-pill.medium { background: rgba(242,183,5,0.08); color: var(--amber); border: 1px solid var(--border); }
.sev-pill.low { background: rgba(139,149,167,0.1); color: var(--muted); border: 1px solid var(--border); }

.finding-row { display: flex; gap: 10px; padding: 10px 0; border-bottom: 1px solid var(--border); align-items: flex-start; }
.finding-row:last-child { border-bottom: none; }
.finding-row .finding-title { font-size: 13.5px; font-weight: 600; margin-bottom: 2px; }
.finding-row .finding-desc { font-size: 12.5px; color: var(--muted); }

.checklist-item { display: flex; gap: 10px; padding: 8px 0; border-bottom: 1px solid var(--border); font-size: 13.5px; align-items: flex-start; }
.checklist-item:last-child { border-bottom: none; }
.checklist-item .num { font-family: var(--mono); color: var(--muted); flex-shrink: 0; }

.proto-grid { display: flex; gap: 10px; flex-wrap: wrap; }
.proto-chip {
  font-family: var(--mono);
  font-size: 12px;
  padding: 6px 12px;
  border-radius: 20px;
  border: 1px solid var(--border);
}
.proto-chip.yes-good { color: var(--teal); border-color: var(--teal); }
.proto-chip.yes-bad { color: var(--red); border-color: var(--red); }
.proto-chip.no { color: var(--muted); }

.compat-risk { display: inline-block; padding: 3px 10px; border-radius: 3px; font-family: var(--mono); font-size: 11px; text-transform: uppercase; }
.compat-risk.low { color: var(--teal); border: 1px solid var(--teal); }
.compat-risk.medium { color: var(--amber); border: 1px solid var(--amber); }
.compat-risk.high, .compat-risk.critical { color: var(--red); border: 1px solid var(--red); }
.compat-risk.none { color: var(--muted); border: 1px solid var(--border); }

/* ---------- Profile menu (top-right) ---------- */

.topbar {
  position: fixed;
  top: 16px;
  right: 20px;
  z-index: 100;
}

.profile-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--panel-raised);
  border: 1px solid var(--border);
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-family: var(--mono);
  font-size: 14px;
}
.profile-btn:hover { border-color: var(--teal); }

.profile-dropdown {
  position: absolute;
  top: 46px;
  right: 0;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  min-width: 200px;
  box-shadow: 0 12px 28px rgba(0,0,0,0.45);
  overflow: hidden;
  display: none;
}
.profile-dropdown.open { display: block; }

.profile-dropdown .signed-in-as {
  padding: 12px 14px;
  font-size: 11.5px;
  color: var(--muted);
  font-family: var(--mono);
  border-bottom: 1px solid var(--border);
}
.profile-dropdown .signed-in-as strong { color: var(--text); display: block; font-size: 13px; margin-top: 2px; }

.profile-dropdown button, .profile-dropdown a {
  display: block;
  width: 100%;
  text-align: left;
  padding: 10px 14px;
  color: var(--text);
  text-decoration: none;
  font-size: 13.5px;
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--sans);
}
.profile-dropdown button:hover, .profile-dropdown a:hover { background: var(--panel-raised); }
.profile-dropdown .logout-item { color: var(--red); border-top: 1px solid var(--border); }

@media (max-width: 600px) {
  .topbar { top: 12px; right: 12px; }
}

/* ---------- Simple modal (About / Contact) ---------- */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 20px;
}
.modal-overlay.open { display: flex; }

.modal-box {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 26px;
  max-width: 420px;
  width: 100%;
}
.modal-box h2 { margin: 0 0 12px; font-size: 16px; }
.modal-box p { font-size: 13.5px; color: var(--text); line-height: 1.6; margin: 0 0 10px; }
.modal-box .modal-close { margin-top: 12px; }

/* ---------- Home / landing page ---------- */

.home-shell { max-width: 1080px; margin: 0 auto; padding: 72px 32px 100px; }

.hero { text-align: center; padding: 20px 0 56px; }
.hero .eyebrow {
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.15em;
  text-transform: uppercase; color: var(--teal); margin-bottom: 18px;
}
.hero h1 {
  font-family: var(--mono); font-size: 46px; letter-spacing: -0.01em;
  margin: 0 0 16px; font-weight: 700;
}
.hero .tagline { font-size: 17px; color: var(--muted); max-width: 540px; margin: 0 auto 44px; line-height: 1.6; }

.trust-chain { display: flex; align-items: center; justify-content: center; gap: 0; margin: 0 auto 40px; max-width: 460px; }
.trust-chain .tc-node {
  width: 62px; height: 62px; border-radius: 50%; border: 2px solid var(--border);
  display: flex; align-items: center; justify-content: center; background: var(--panel);
  flex-shrink: 0; font-family: var(--mono); font-size: 10.5px; color: var(--muted);
}
.trust-chain .tc-node.verified { border-color: var(--teal); color: var(--teal); }
.trust-chain .tc-line { flex: 1; height: 2px; background: var(--border); min-width: 36px; position: relative; overflow: hidden; }
@media (prefers-reduced-motion: no-preference) {
  .trust-chain .tc-line::after {
    content: ""; position: absolute; inset: 0; background: var(--teal);
    transform: scaleX(0); transform-origin: left; animation: tc-draw 1.1s ease forwards;
  }
  .trust-chain .tc-line.line-2::after { animation-delay: 0.5s; }
}
@keyframes tc-draw { to { transform: scaleX(1); } }

.fact-row { display: flex; justify-content: center; gap: 26px; flex-wrap: wrap; font-family: var(--mono); font-size: 12.5px; color: var(--muted); }
.fact-row span { display: inline-flex; align-items: center; gap: 8px; }
.fact-row .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--teal); display: inline-block; flex-shrink: 0; }

.module-card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; margin-top: 56px; }
.module-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 10px;
  padding: 26px 22px; text-decoration: none; color: var(--text); display: block;
}
.module-card:hover { border-color: var(--teal); transform: translateY(-2px); }
.module-card .mc-icon {
  width: 36px; height: 36px; border-radius: 8px; background: var(--panel-raised);
  border: 1px solid var(--border); display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px; color: var(--amber);
}
.module-card h3 { font-size: 16px; margin: 0 0 8px; }
.module-card p { font-size: 13px; color: var(--muted); margin: 0; line-height: 1.55; }
.module-card .mc-arrow { margin-top: 16px; font-family: var(--mono); font-size: 12px; color: var(--teal); }

.home-footer { text-align: center; margin-top: 64px; color: var(--muted); font-size: 11.5px; }

@media (max-width: 600px) {
  .home-shell { padding: 56px 20px 80px; }
  .hero h1 { font-size: 32px; }
  .trust-chain { max-width: 320px; }
  .trust-chain .tc-node { width: 50px; height: 50px; font-size: 9px; }
}