:root {
  /* gunmetal base */
  --bg-0:   #0b0d12;
  --ink:    #E9ECF2;
  --muted:  #99A2B2;
  --faint:  #646C7C;
  --line:   rgba(255,255,255,.10);

  /* smoked / matte glass */
  --glass:        rgba(26,31,40,.55);
  --glass-strong: rgba(30,36,46,.72);
  --glass-brd:    rgba(255,255,255,.11);
  --glass-hi:     rgba(255,255,255,.06);

  /* violet "chrome" (Decepticon-derived) — interactive & branding only */
  --brand:      #9A7BFF;
  --brand-deep: #5B3FD6;

  /* semantic signal scale (scores) */
  --good:   #32D583;
  --warn:   #F6AD2B;
  --bad:    #FF5366;   /* Megatron-eye red, reserved for problems */
  --info:   #8A93A3;
  --good-bg: rgba(50,213,131,.14);
  --warn-bg: rgba(246,173,43,.15);
  --bad-bg:  rgba(255,83,102,.15);
  --info-bg: rgba(255,255,255,.06);

  --radius:  14px;
  --display: "Space Grotesk", system-ui, sans-serif;
  --body:    "Inter", system-ui, sans-serif;
  --mono:    "JetBrains Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--body);
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
  background-color: var(--bg-0);
  background-image:
    radial-gradient(1000px 620px at 14% -12%, rgba(154,123,255,.20), transparent 60%),
    radial-gradient(900px 620px at 116% 2%,  rgba(255,83,102,.12), transparent 55%),
    repeating-linear-gradient(90deg, rgba(255,255,255,.014) 0 1px, transparent 1px 4px),
    linear-gradient(180deg, #141821 0%, #0a0c11 100%);
  background-attachment: fixed;
}

.wrap { max-width: 880px; margin: 0 auto; padding: 44px 22px 90px; }
.hidden { display: none !important; }

/* glass surface, shared */
.readout, .cat-meters, .actions, .status, .cat-block {
  background: var(--glass);
  -webkit-backdrop-filter: blur(22px) saturate(1.3);
  backdrop-filter: blur(22px) saturate(1.3);
  border: 1px solid var(--glass-brd);
  border-radius: var(--radius);
  box-shadow: 0 14px 40px rgba(0,0,0,.45), inset 0 1px 0 var(--glass-hi);
}

/* ---- masthead ---- */
.masthead { display: flex; align-items: baseline; gap: 18px;
  flex-wrap: wrap; margin-bottom: 36px; }
.brand { display: flex; align-items: center; gap: 11px; }
.brand-mark { width: 16px; height: 16px; border-radius: 4px;
  background: linear-gradient(160deg, var(--brand), var(--brand-deep));
  box-shadow: 0 0 18px rgba(154,123,255,.6), inset 0 1px 0 rgba(255,255,255,.4); }
.brand-name { font-family: var(--mono); font-weight: 600; letter-spacing: .15em;
  font-size: 15px; }
.tagline { margin: 0; color: var(--muted); font-size: 14px; }
.logout-form { margin-left: auto; }
.logout-form button {
  padding: 8px 12px; border: 1px solid var(--glass-brd); border-radius: 8px;
  background: var(--glass); color: var(--muted); font-family: var(--mono);
  font-size: 11px; letter-spacing: .08em; text-transform: uppercase;
  cursor: pointer; transition: color .15s, border-color .15s; }
.logout-form button:hover { color: var(--ink); border-color: var(--brand); }

/* ---- login ---- */
.login-page { display: grid; place-items: center; padding: 22px; }
.login-shell { width: min(100%, 420px); }
.login-card {
  background: var(--glass); border: 1px solid var(--glass-brd);
  border-radius: var(--radius); padding: 30px;
  -webkit-backdrop-filter: blur(22px) saturate(1.3);
  backdrop-filter: blur(22px) saturate(1.3);
  box-shadow: 0 18px 54px rgba(0,0,0,.52), inset 0 1px 0 var(--glass-hi); }
.login-brand { margin-bottom: 28px; }
.login-card h1 {
  margin: 0 0 22px; font-family: var(--display); font-size: 30px;
  line-height: 1.1; font-weight: 600; }
.login-form { display: flex; flex-direction: column; gap: 16px; }
.login-form label { display: flex; flex-direction: column; gap: 7px; }
.login-form span {
  font-family: var(--mono); font-size: 11px; color: var(--faint);
  letter-spacing: .16em; text-transform: uppercase; }
.login-form input {
  width: 100%; padding: 15px 16px; border: 1px solid var(--glass-brd);
  border-radius: var(--radius); background: var(--glass-strong); color: var(--ink);
  font-family: var(--body); font-size: 16px; outline: none;
  transition: border-color .15s, box-shadow .15s; }
.login-form input:focus {
  border-color: var(--brand); box-shadow: 0 0 0 4px rgba(154,123,255,.22); }
.login-error {
  margin: 0; padding: 10px 12px; border: 1px solid rgba(255,83,102,.4);
  border-radius: 8px; background: var(--bad-bg); color: #FFB3BC;
  font-size: 13px; }
.login-submit {
  min-height: 50px; border: 1px solid rgba(255,255,255,.16);
  border-radius: var(--radius); background: linear-gradient(180deg, var(--brand), var(--brand-deep));
  color: #fff; font-family: var(--display); font-size: 16px; font-weight: 600;
  cursor: pointer; box-shadow: 0 8px 24px rgba(91,63,214,.5), inset 0 1px 0 rgba(255,255,255,.3);
  transition: transform .1s, filter .15s; }
.login-submit:hover { filter: brightness(1.12); }
.login-submit:active { transform: translateY(1px); }

/* ---- intro disclosure ---- */
.intro-more { margin-bottom: 28px; }
.intro-more summary {
  display: inline-flex; align-items: center; gap: 7px;
  font-family: var(--display); font-size: 14px; font-weight: 600;
  color: var(--brand); cursor: pointer; list-style: none; }
.intro-more summary::-webkit-details-marker { display: none; }
.intro-more summary::before { content: "+"; display: inline-block; width: 18px;
  height: 18px; line-height: 17px; text-align: center; border-radius: 50%;
  border: 1px solid rgba(154,123,255,.4); font-size: 13px; flex: none; }
.intro-more[open] summary::before { content: "–"; }
.intro-body { margin-top: 16px; padding: 22px 26px;
  background: var(--glass); border: 1px solid var(--glass-brd); border-radius: var(--radius);
  -webkit-backdrop-filter: blur(22px) saturate(1.3); backdrop-filter: blur(22px) saturate(1.3);
  box-shadow: 0 14px 40px rgba(0,0,0,.45), inset 0 1px 0 var(--glass-hi); }
.intro-body p { margin: 0 0 14px; font-size: 14.5px; line-height: 1.7; color: var(--muted); }
.intro-body p:last-child { margin-bottom: 0; }
.intro-body b { color: var(--ink); }

/* ---- scanner (hero) ---- */
.scan-eyebrow { display: block; font-family: var(--mono); font-size: 11px;
  letter-spacing: .16em; text-transform: uppercase; color: var(--faint);
  margin: 0 0 9px 2px; }

.url-stack { flex: 1; min-width: 0; }
.url-rows { display: flex; flex-direction: column; gap: 10px; margin-bottom: 10px; }
.url-row { display: flex; gap: 10px; }
.url-field {
  flex: 1; min-width: 0; padding: 17px 18px;
  border: 1px solid var(--glass-brd); border-radius: var(--radius);
  background: var(--glass-strong); color: var(--ink);
  -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
  font-family: var(--mono); font-size: 16px; outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.url-field::placeholder { color: var(--faint); }
.url-field:focus { border-color: var(--brand);
  box-shadow: 0 0 0 4px rgba(154,123,255,.22); }

.row-remove {
  flex: none; width: 50px; border: 1px solid var(--glass-brd); border-radius: var(--radius);
  background: var(--glass-strong); color: var(--faint);
  font-size: 19px; line-height: 1; cursor: pointer;
  transition: color .15s, border-color .15s; }
.row-remove:hover { color: var(--bad); border-color: rgba(255,83,102,.4); }
.url-row.single .row-remove { display: none; }

.add-url {
  flex: none; width: 36px; height: 36px;
  border: 1px solid var(--glass-brd); border-radius: 50%;
  background: var(--glass-strong); color: var(--brand);
  font-size: 19px; font-weight: 600; line-height: 1; cursor: pointer;
  transition: border-color .15s, filter .15s; }
.add-url:hover { border-color: var(--brand); filter: brightness(1.2); }

.scan-bar { display: flex; gap: 10px; align-items: flex-start; }
#run {
  flex: none; padding: 0 32px; border: 1px solid rgba(255,255,255,.16); border-radius: var(--radius);
  background: linear-gradient(180deg, var(--brand), var(--brand-deep));
  color: #fff; font-family: var(--display); font-weight: 600; font-size: 16px;
  letter-spacing: .01em; cursor: pointer; min-height: 54px;
  box-shadow: 0 8px 24px rgba(91,63,214,.5), inset 0 1px 0 rgba(255,255,255,.3);
  transition: transform .1s, filter .15s; }
#run:hover { filter: brightness(1.12); }
#run:active { transform: translateY(1px); }
#run:disabled { opacity: .55; cursor: progress; }
.scan-note { margin: 12px 2px 0; color: var(--faint); font-size: 13px; }

/* ---- status / loading ---- */
.status { margin-top: 30px; padding: 22px 24px;
  font-family: var(--mono); font-size: 14px; color: var(--muted);
  display: flex; align-items: center; gap: 14px; }
.spinner { width: 18px; height: 18px; border: 2.5px solid rgba(255,255,255,.16);
  border-top-color: var(--brand); border-radius: 50%;
  animation: spin .7s linear infinite; flex: none; }
@keyframes spin { to { transform: rotate(360deg); } }
.status.err { color: #FFB3BC; border-color: rgba(255,83,102,.5);
  background: rgba(255,83,102,.12); }

/* ---- critical / gating banner ---- */
.critical-banner { margin-bottom: 20px; padding: 6px 22px;
  background: var(--bad-bg); border: 1px solid rgba(255,83,102,.4);
  border-radius: var(--radius); }
.critical-row { display: flex; gap: 13px; align-items: flex-start;
  padding: 14px 0; border-bottom: 1px solid rgba(255,83,102,.25); font-size: 14px; }
.critical-row:last-child { border-bottom: none; }
.critical-row div { color: var(--ink); }

/* ---- multi-page report tabs ---- */
.report { margin-top: 34px; }
.tabs { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 20px; }
.tab {
  padding: 10px 18px; border: 1px solid var(--glass-brd); border-radius: var(--radius);
  background: var(--glass); color: var(--muted);
  font-family: var(--mono); font-size: 13px; cursor: pointer;
  transition: color .15s, border-color .15s, background .15s; }
.tab:hover { color: var(--ink); }
.tab.active {
  color: #fff; border-color: var(--brand);
  background: linear-gradient(180deg, var(--brand), var(--brand-deep));
  box-shadow: 0 6px 18px rgba(91,63,214,.4); }
.tab-pane { display: none; }
.tab-pane.active { display: block; }

/* ---- report header: gauge + summary ---- */
.report-card + .report-card { margin-top: 56px; padding-top: 40px;
  border-top: 1px solid var(--line); }
.readout {
  display: grid; grid-template-columns: 230px 1fr; gap: 26px;
  align-items: center; padding: 28px; }
.gauge-wrap { position: relative; text-align: center; }
.gauge-grade { position: absolute; left: 0; right: 0; top: 48px;
  font-family: var(--display); font-weight: 700; font-size: 54px; line-height: 1;
  text-shadow: 0 0 22px currentColor; }
.gauge-score { position: absolute; left: 0; right: 0; top: 108px;
  font-family: var(--mono); font-size: 13px; color: var(--muted); }
.summary h1 { margin: 0 0 5px; font-family: var(--display); font-size: 25px;
  font-weight: 600; letter-spacing: -.01em; }
.summary .url { font-family: var(--mono); font-size: 13px; color: var(--brand);
  word-break: break-all; }
.summary .meta { margin-top: 13px; font-size: 13px; color: var(--muted); }
.summary .meta b { color: var(--ink); font-weight: 600; }

/* ---- category meters ---- */
.section-eyebrow { font-family: var(--mono); font-size: 11px; letter-spacing: .16em;
  text-transform: uppercase; color: var(--faint); margin: 38px 2px 14px; }
.cat-meters { display: flex; flex-direction: column; gap: 14px; padding: 24px 26px; }
.meter { display: grid; grid-template-columns: 1fr 56px; gap: 12px 14px;
  align-items: center; }
.meter .name { font-size: 14px; font-weight: 500; }
.meter .val { font-family: var(--mono); font-size: 14px; text-align: right;
  font-weight: 600; }
.meter .track { grid-column: 1 / -1; height: 7px; border-radius: 5px;
  background: rgba(255,255,255,.08); overflow: hidden; }
.meter .fill { height: 100%; width: 0; border-radius: 5px;
  transition: width .85s cubic-bezier(.2,.7,.2,1); }

/* ---- actions ---- */
.actions { padding: 8px 26px; }
.action { display: flex; gap: 13px; align-items: flex-start;
  padding: 16px 0; border-bottom: 1px solid var(--line); }
.action:last-child { border-bottom: none; }
.action .fix { font-size: 14px; }
.action .where { font-family: var(--mono); font-size: 11px; color: var(--faint);
  text-transform: uppercase; letter-spacing: .08em; margin-top: 4px; }

/* ---- detailed checks ---- */
.cat-block { margin-bottom: 16px; overflow: hidden; }
.cat-head { display: flex; justify-content: space-between; align-items: center;
  padding: 17px 24px; border-bottom: 1px solid var(--line); }
.cat-head h3 { margin: 0; font-family: var(--display); font-size: 16px; font-weight: 600; }
.cat-head .desc { font-size: 12px; color: var(--muted); margin-top: 3px; }
.cat-head .cscore { font-family: var(--mono); font-weight: 600; font-size: 16px;
  text-shadow: 0 0 16px currentColor; }
.check { padding: 15px 24px; border-bottom: 1px solid var(--line);
  display: grid; grid-template-columns: 80px 1fr; gap: 14px; }
.check:last-child { border-bottom: none; }
.check .label { font-size: 14px; font-weight: 500; }
.check .summary-line { font-size: 13.5px; color: var(--muted); margin-top: 3px; }
.check .rec { font-size: 13px; margin-top: 9px; padding: 10px 13px;
  background: var(--info-bg); border-left: 2px solid var(--faint);
  border-radius: 0 8px 8px 0; color: var(--ink); }
.check.fail .rec { background: var(--bad-bg); border-color: var(--bad); }
.check.warn .rec { background: var(--warn-bg); border-color: var(--warn); }
details.evi { margin-top: 9px; }
details.evi summary { font-family: var(--mono); font-size: 11px; color: var(--faint);
  cursor: pointer; letter-spacing: .06em; text-transform: uppercase; }
details.evi pre { margin: 8px 0 0; padding: 13px;
  background: rgba(0,0,0,.42); color: #C2CBD8; border: 1px solid var(--line);
  border-radius: 8px; font-family: var(--mono); font-size: 12px; overflow-x: auto; }

details.learn-more { margin-top: 9px; }
details.learn-more summary { font-family: var(--mono); font-size: 11px; color: var(--brand);
  cursor: pointer; letter-spacing: .06em; text-transform: uppercase; }
.learn-more-body { margin: 8px 0 0; padding: 12px 15px;
  background: rgba(154,123,255,.10); border-left: 2px solid var(--brand);
  border-radius: 0 8px 8px 0; color: var(--ink); font-size: 13.5px; line-height: 1.6; }
.learn-more-body li { margin-bottom: 6px; }
.learn-more-body a { color: var(--brand); text-decoration: underline; }
.learn-more-body a:hover { color: #fff; }

/* ---- status pills ---- */
.pill { display: inline-block; font-family: var(--mono); font-size: 10.5px;
  font-weight: 600; letter-spacing: .09em; text-transform: uppercase;
  padding: 4px 8px; border-radius: 6px; text-align: center; min-width: 56px;
  border: 1px solid transparent; }
.pill.pass { background: var(--good-bg); color: var(--good);
  border-color: rgba(50,213,131,.3); }
.pill.warn { background: var(--warn-bg); color: var(--warn);
  border-color: rgba(246,173,43,.3); }
.pill.fail { background: var(--bad-bg);  color: #FF7C89;
  border-color: rgba(255,83,102,.35); }
.pill.info { background: var(--info-bg); color: var(--info);
  border-color: var(--line); }
.pill.error{ background: var(--info-bg); color: var(--info);
  border-color: var(--line); }

.foot { margin-top: 46px; font-family: var(--mono); font-size: 11px;
  color: var(--faint); letter-spacing: .04em; text-align: center; }

@media (max-width: 640px) {
  .masthead { align-items: center; }
  .logout-form { margin-left: 0; width: 100%; }
  .readout { grid-template-columns: 1fr; text-align: center; }
  .gauge-wrap { margin: 0 auto; max-width: 230px; }
  .summary .url { justify-self: center; }
  .check { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  .meter .fill { transition: none; } .spinner { animation-duration: 1.4s; }
}