:root {
  color-scheme: light;
  --ink: #172022;
  --muted: #647071;
  --line: #dbe2df;
  --paper: #f8faf7;
  --panel: #ffffff;
  --accent: #0f8f7c;
  --accent-strong: #006d62;
  --blue: #2864c8;
  --amber: #bd7a00;
  --red: #c74637;
  --green: #15855f;
  --shadow: 0 18px 50px rgba(23, 32, 34, 0.12);
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    linear-gradient(135deg, rgba(15, 143, 124, 0.08), transparent 36%),
    linear-gradient(220deg, rgba(40, 100, 200, 0.08), transparent 34%),
    var(--paper);
  font-family: Inter, "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
}

button,
input {
  font: inherit;
}

.shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 30px 0 56px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 520px);
  gap: 28px;
  align-items: stretch;
  min-height: 320px;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 34px 0;
}

.eyebrow,
.section-kicker {
  margin: 0 0 12px;
  color: var(--accent-strong);
  font-size: 13px;
  font-weight: 760;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  letter-spacing: 0;
}

h1 {
  margin: 0;
  font-size: clamp(42px, 7vw, 82px);
  line-height: 0.98;
}

.subhead {
  max-width: 680px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.7;
}

.signal-panel {
  position: relative;
  min-height: 320px;
  overflow: hidden;
  border: 1px solid rgba(15, 143, 124, 0.2);
  border-radius: 8px;
  background:
    radial-gradient(circle at 34% 28%, rgba(15, 143, 124, 0.18), transparent 30%),
    linear-gradient(145deg, #102123, #183434 52%, #f4f6f0 52%);
  box-shadow: var(--shadow);
}

#signalCanvas {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 320px;
}

.signal-readout {
  position: absolute;
  right: 18px;
  bottom: 18px;
  display: grid;
  gap: 4px;
  min-width: 136px;
  padding: 12px 14px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 8px;
  color: white;
  background: rgba(16, 33, 35, 0.72);
  backdrop-filter: blur(12px);
}

.signal-readout span {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.72);
}

.signal-readout strong {
  font-size: 20px;
}

.workspace {
  margin-top: 22px;
}

.query-bar {
  display: grid;
  grid-template-columns: minmax(260px, 1fr) minmax(220px, 300px) auto auto;
  gap: 14px;
  align-items: end;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 12px 34px rgba(23, 32, 34, 0.08);
}

.field {
  display: grid;
  gap: 7px;
}

label {
  color: #425052;
  font-size: 13px;
  font-weight: 700;
}

input[type="text"],
input:not([type]) {
  width: 100%;
}

#ipInput {
  height: 48px;
  padding: 0 14px;
  border: 1px solid #cdd8d4;
  border-radius: 8px;
  outline: none;
  background: white;
  color: var(--ink);
}

#ipInput:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(15, 143, 124, 0.12);
}

.verify-row {
  display: grid;
  grid-template-columns: auto minmax(70px, 1fr) 42px;
  gap: 8px;
  align-items: center;
}

.challenge-question {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  min-width: 92px;
  padding: 0 10px;
  border: 1px solid #cdd8d4;
  border-radius: 8px;
  background: #f5faf8;
  color: #223233;
  font-weight: 800;
}

#challengeAnswer {
  width: 100%;
  height: 48px;
  padding: 0 12px;
  border: 1px solid #cdd8d4;
  border-radius: 8px;
  outline: none;
}

#challengeAnswer:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(15, 143, 124, 0.12);
}

.icon-button {
  min-width: 42px;
  width: 42px;
  padding: 0;
  color: var(--accent-strong);
  background: #e9f4f1;
}

.toggle {
  display: flex;
  align-items: center;
  gap: 9px;
  min-height: 48px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fdfefe;
  white-space: nowrap;
}

.toggle input {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
}

button {
  height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-width: 132px;
  padding: 0 18px;
  border: none;
  border-radius: 8px;
  color: white;
  background: var(--accent-strong);
  cursor: pointer;
}

button:disabled {
  cursor: progress;
  opacity: 0.72;
}

.button-icon {
  font-size: 18px;
  line-height: 1;
}

.empty-state,
.loading-state,
.error-state {
  margin-top: 18px;
  padding: 28px;
  border: 1px dashed #b8c6c2;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.66);
}

.empty-state h2 {
  margin: 0 0 8px;
  font-size: 22px;
}

.empty-state p,
.loading-state p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.loading-state {
  display: flex;
  align-items: center;
  gap: 14px;
}

.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid #c9d8d5;
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.error-state {
  color: #781f17;
  border-color: rgba(199, 70, 55, 0.35);
  background: rgba(199, 70, 55, 0.08);
}

.report {
  margin-top: 18px;
}

.score-band {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 20px;
  align-items: center;
  padding: 24px;
  border-radius: 8px;
  color: white;
  background: linear-gradient(135deg, #123134, #0f6f69 56%, #295f9f);
  box-shadow: var(--shadow);
}

.score-ring {
  width: 126px;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 10px solid rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.1);
}

.score-ring span {
  font-size: 42px;
  font-weight: 820;
}

.score-ring small {
  margin-top: -24px;
  color: rgba(255, 255, 255, 0.72);
  font-weight: 800;
}

.score-band .section-kicker {
  color: rgba(255, 255, 255, 0.72);
}

.score-band h2 {
  margin: 0 0 8px;
  font-size: 30px;
}

.score-band.score-good h2,
.score-band.score-good .score-ring span,
.score-band.score-good .score-ring small {
  color: #8ff0c5;
}

.score-band.score-warning h2,
.score-band.score-warning .score-ring span,
.score-band.score-warning .score-ring small {
  color: #ffd072;
}

.score-band.score-danger h2,
.score-band.score-danger .score-ring span,
.score-band.score-danger .score-ring small {
  color: #ff9b8c;
}

.score-band.score-good .score-ring {
  border-color: rgba(143, 240, 197, 0.38);
}

.score-band.score-warning .score-ring {
  border-color: rgba(255, 208, 114, 0.38);
}

.score-band.score-danger .score-ring {
  border-color: rgba(255, 155, 140, 0.4);
}

.score-band p {
  margin: 0;
  color: rgba(255, 255, 255, 0.82);
  line-height: 1.65;
}

.report-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 14px;
}

.panel {
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 8px 20px rgba(23, 32, 34, 0.06);
}

.panel-wide {
  grid-column: span 3;
}

.panel-title {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 14px;
}

.panel-title h3 {
  margin: 0;
  font-size: 17px;
}

.panel-help {
  margin: -4px 0 14px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}

.status-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 5px rgba(15, 143, 124, 0.12);
}

.info-list {
  display: grid;
  grid-template-columns: minmax(92px, auto) 1fr;
  gap: 9px 14px;
  margin: 0;
}

.info-list-wide {
  grid-template-columns: repeat(4, max-content minmax(0, 1fr));
}

.info-list dt {
  color: var(--muted);
  font-size: 13px;
}

.info-list dd {
  min-width: 0;
  margin: 0;
  overflow-wrap: anywhere;
  font-weight: 720;
}

.big-badge {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 12px;
  border-radius: 8px;
  color: white;
  background: var(--amber);
  font-weight: 800;
}

.big-badge.good {
  background: var(--green);
}

.big-badge.danger,
.big-badge.critical {
  background: var(--red);
}

.clean-list,
.recommendation-list {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.clean-list li,
.recommendation-list li {
  padding: 11px 0;
  border-top: 1px solid #eef2f0;
  color: #344043;
  line-height: 1.55;
}

.issue-list {
  margin-top: 0;
}

.issue-list li:first-child {
  border-top: 0;
  padding-top: 0;
}

.issue-list li strong,
.issue-list li span {
  display: block;
}

.issue-list li strong {
  margin-bottom: 4px;
  color: var(--ink);
}

.issue-list li.good strong {
  color: var(--green);
}

.issue-list li.warning strong {
  color: var(--amber);
}

.issue-list li.danger strong {
  color: var(--red);
}

.term-box {
  display: grid;
  gap: 8px;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid #eef2f0;
}

.term-row {
  display: grid;
  grid-template-columns: minmax(76px, auto) 1fr;
  gap: 10px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.55;
}

.term-row strong {
  color: #344043;
}

.risk-pill {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 2px 9px;
  border-radius: 999px;
  color: #455253;
  background: #eef2f0;
  font-size: 12px;
  font-weight: 800;
}

.risk-pill.risk-no {
  color: #12684f;
  background: rgba(21, 133, 95, 0.12);
}

.risk-pill.risk-yes {
  color: #8b2a1f;
  background: rgba(199, 70, 55, 0.12);
}

.meta-value {
  color: #344043;
  font-size: 13px;
  font-weight: 760;
}

.muted {
  margin: 0 0 14px;
  color: var(--muted);
  line-height: 1.6;
}

.platform-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.platform {
  min-height: 112px;
  padding: 14px;
  border: 1px solid #e1e8e5;
  border-radius: 8px;
  background: #fbfdfc;
}

.platform strong,
.platform span {
  display: block;
}

.platform strong {
  margin-bottom: 5px;
  overflow-wrap: anywhere;
}

.platform .category {
  color: var(--muted);
  font-size: 12px;
}

.platform .verdict {
  margin-top: 12px;
  font-weight: 800;
}

.platform .latency {
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
}

.platform .region {
  margin-top: 8px;
  color: #334648;
  font-size: 13px;
  font-weight: 760;
}

.reachable .verdict {
  color: var(--green);
}

.restricted .verdict {
  color: var(--amber);
}

.blocked .verdict {
  color: var(--red);
}

.reference .verdict {
  color: var(--blue);
}

@media (max-width: 920px) {
  .hero,
  .query-bar,
  .score-band {
    grid-template-columns: 1fr;
  }

  .query-bar {
    align-items: stretch;
  }

  .toggle {
    justify-content: flex-start;
    white-space: normal;
  }

  .report-grid {
    grid-template-columns: 1fr;
  }

  .panel-wide {
    grid-column: span 1;
  }

  .info-list-wide {
    grid-template-columns: minmax(92px, auto) 1fr;
  }

  .platform-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .shell {
    width: min(100% - 20px, 1180px);
    padding-top: 14px;
  }

  h1 {
    font-size: 40px;
  }

  .subhead {
    font-size: 16px;
  }

  .score-ring {
    width: 108px;
  }

  .platform-grid {
    grid-template-columns: 1fr;
  }
}