:root {
  --bg: #ffffff;
  --fg: #0f0f0f;
  --muted: #666666;
  --line: #d9d9d9;
  --soft: #f5f5f5;
  --safe: #111111;
  --caution: #555555;
  --avoid: #8a8a8a;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.06);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Manrope", system-ui, sans-serif;
}

body {
  min-height: 100vh;
}

.shell {
  width: min(100%, 1120px);
  margin: 0 auto;
  padding: 48px 20px 72px;
}

.hero {
  max-width: 760px;
  margin-bottom: 28px;
}

.eyebrow,
.mini,
.hint,
.score-label {
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.hero h1 {
  margin: 10px 0 14px;
  font-family: "Source Serif 4", Georgia, serif;
  font-size: clamp(2.4rem, 5vw, 4.8rem);
  line-height: 0.97;
  letter-spacing: -0.04em;
}

.lede {
  max-width: 620px;
  margin: 0;
  font-size: 18px;
  line-height: 1.7;
  color: #222;
}

.lookup-card,
.result,
.panel,
.error {
  border: 1px solid var(--line);
  background: #fff;
  box-shadow: var(--shadow);
}

.lookup-card {
  padding: 18px;
  margin-bottom: 22px;
}

.lookup-form {
  display: grid;
  gap: 10px;
}

.label {
  font-size: 14px;
  font-weight: 700;
}

.input-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
}

input,
button {
  border-radius: 0;
  border: 1px solid var(--fg);
  font: inherit;
}

input {
  min-height: 58px;
  padding: 0 16px;
  font-size: 16px;
  background: #fff;
  color: var(--fg);
}

input:focus {
  outline: 2px solid #000;
  outline-offset: 1px;
}

button {
  min-width: 148px;
  min-height: 58px;
  padding: 0 20px;
  background: #111;
  color: #fff;
  font-weight: 800;
  cursor: pointer;
}

button:hover {
  background: #000;
}

.hint {
  margin: 0;
}

.hidden {
  display: none !important;
}

.result {
  padding: 20px;
}

.result-head {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: flex-end;
  margin-bottom: 22px;
}

.score-row {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

#score-number {
  font-family: "Source Serif 4", Georgia, serif;
  font-size: clamp(3rem, 8vw, 5.4rem);
  line-height: 0.95;
  letter-spacing: -0.06em;
}

.provider-chip {
  min-width: 220px;
  padding: 16px;
  border: 1px solid var(--line);
  background: var(--soft);
}

.facts-grid,
.detail-grid,
.dns-grid {
  display: grid;
  gap: 14px;
}

.facts-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-bottom: 18px;
}

.fact-card {
  padding: 16px;
  border: 1px solid var(--line);
}

.fact-card strong,
.provider-chip strong {
  display: block;
  margin-top: 4px;
  font-size: 16px;
  line-height: 1.4;
}

.panel {
  padding: 18px;
  margin-bottom: 14px;
}

.stack-list,
.detail-list {
  margin: 10px 0 0;
  padding-left: 18px;
}

.stack-list li,
.detail-list li {
  margin: 6px 0;
  line-height: 1.6;
}

.flow-text {
  margin: 10px 0 0;
  font-size: 16px;
  line-height: 1.7;
}

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

.dns-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 14px;
}

.mono li {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 13px;
  word-break: break-word;
}

.error {
  padding: 16px 18px;
  margin-top: 18px;
  border-color: #111;
}

.is-safe .score-label {
  color: var(--safe);
}

.is-caution .score-label {
  color: var(--caution);
}

.is-avoid .score-label {
  color: var(--avoid);
}

@media (max-width: 920px) {
  .facts-grid,
  .detail-grid,
  .dns-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .shell {
    padding: 28px 14px 48px;
  }

  .input-row,
  .facts-grid,
  .detail-grid,
  .dns-grid,
  .result-head {
    grid-template-columns: 1fr;
    display: grid;
  }

  button {
    width: 100%;
  }

  .provider-chip {
    min-width: 0;
  }
}