:root {
  --bg: #05070c;
  --panel: #0b1020;
  --panel-2: #10172b;
  --line: #1c2540;
  --text: #e6ebf5;
  --muted: #8d97b0;
  --accent: #7cf3c8;
  --accent-2: #6aa8ff;
  --pass: #3ddc97;
  --warn: #ffc857;
  --fail: #ff5c7a;
  --info: #6aa8ff;
  --radius: 14px;
  --mono: ui-monospace, 'Cascadia Code', 'SF Mono', Menlo, Consolas, monospace;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(106, 168, 255, 0.12), transparent 60%),
    radial-gradient(900px 500px at -10% 10%, rgba(124, 243, 200, 0.08), transparent 60%),
    var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}

a {
  color: var(--accent);
}

code,
pre {
  font-family: var(--mono);
  font-size: 0.92em;
}

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

[hidden] {
  display: none !important;
}

/* ---------- header and footer ---------- */

.top,
.foot,
main {
  width: min(960px, 100% - 32px);
  margin-inline: auto;
}

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-family: var(--mono);
  font-weight: 700;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: var(--bg);
  font-size: 20px;
  line-height: 1;
}

.top nav {
  display: flex;
  gap: 18px;
  font-size: 14px;
}

.top nav a,
.foot a {
  color: var(--muted);
  text-decoration: none;
}

.top nav a:hover,
.foot a:hover {
  color: var(--text);
}

.foot {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  padding: 40px 0 32px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.foot span {
  margin-right: auto;
}

/* ---------- intro and form ---------- */

.intro {
  padding: 56px 0 24px;
}

h1 {
  margin: 0 0 12px;
  font-size: clamp(32px, 6vw, 56px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  background: linear-gradient(90deg, var(--text), var(--accent) 70%, var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lead {
  max-width: 680px;
  margin: 0 0 28px;
  color: var(--muted);
  font-size: clamp(16px, 2.2vw, 19px);
}

.lead strong {
  color: var(--text);
}

.form {
  display: flex;
  gap: 10px;
  max-width: 680px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 4px);
  background: var(--panel);
  box-shadow: 0 20px 60px -30px rgba(124, 243, 200, 0.35);
}

.form:focus-within {
  border-color: var(--accent);
}

.form input {
  flex: 1;
  min-width: 0;
  padding: 12px 14px;
  border: 0;
  background: transparent;
  color: var(--text);
  font: 17px var(--mono);
  outline: none;
}

.form input::placeholder {
  color: #4d5878;
}

button {
  font: inherit;
  cursor: pointer;
}

.form button {
  padding: 12px 26px;
  border: 0;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: var(--bg);
  font-weight: 700;
}

.form button:disabled {
  cursor: progress;
  opacity: 0.7;
}

.examples {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.examples button,
.actions button {
  padding: 5px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
  color: var(--text);
  font-size: 14px;
}

.examples button {
  font-family: var(--mono);
  font-size: 13px;
}

.examples button:hover,
.actions button:hover {
  border-color: var(--accent);
}

/* ---------- progress ---------- */

.progress,
.error {
  max-width: 680px;
  margin: 8px 0 24px;
}

.steps {
  display: grid;
  gap: 4px;
  margin: 0;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  list-style: none;
}

.steps li {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #4d5878;
}

.steps li::before {
  content: '';
  flex: none;
  width: 10px;
  height: 10px;
  border: 2px solid currentColor;
  border-radius: 50%;
}

.steps li.is-active {
  color: var(--text);
}

.steps li.is-active::before {
  border-color: var(--accent);
  border-top-color: transparent;
  animation: spin 0.8s linear infinite;
}

.steps li.note {
  margin-bottom: 6px;
  color: var(--warn);
}

.steps li.note::before {
  border-color: var(--warn);
  background: var(--warn);
}

.steps li.is-done {
  color: var(--muted);
}

.steps li.is-done::before {
  border-color: var(--pass);
  background: var(--pass);
}

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

.error {
  padding: 14px 18px;
  border: 1px solid rgba(255, 92, 122, 0.4);
  border-radius: var(--radius);
  background: rgba(255, 92, 122, 0.08);
  color: #ffd0d9;
}

/* ---------- report ---------- */

.report {
  padding: 16px 0 24px;
}

.summary {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-bottom: 24px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.score {
  --level: var(--fail);
  position: relative;
  flex: none;
  width: 128px;
  height: 128px;
}

.score[data-level='good'] {
  --level: var(--pass);
}

.score[data-level='ok'] {
  --level: var(--warn);
}

.score[data-level='none'] {
  --level: var(--muted);
}

.score svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.score circle {
  fill: none;
  stroke-width: 10;
}

.ring-bg {
  stroke: var(--line);
}

.ring {
  stroke: var(--level);
  stroke-linecap: round;
  stroke-dasharray: 327;
  stroke-dashoffset: 327;
  transition: stroke-dashoffset 1s ease;
}

.score-value {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  text-align: center;
  line-height: 1;
}

.score-value b {
  color: var(--level);
  font-size: 40px;
}

.score-value small {
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
}

.summary-text {
  min-width: 0;
}

.site {
  margin: 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 14px;
  overflow-wrap: anywhere;
}

.summary h2 {
  margin: 4px 0 10px;
  font-size: clamp(22px, 3.4vw, 30px);
  line-height: 1.2;
}

.counts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 14px;
  padding: 0;
  list-style: none;
  font-size: 14px;
}

.counts li {
  padding: 2px 10px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--c) 14%, transparent);
  color: var(--c);
}

.score-note {
  max-width: 560px;
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 14px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.checks {
  display: grid;
  gap: 12px;
}

.check,
.counts li {
  --c: var(--info);
}

.check.pass,
.counts .pass {
  --c: var(--pass);
}

.check.warn,
.counts .warn {
  --c: var(--warn);
}

.check.fail,
.counts .fail {
  --c: var(--fail);
}

.check {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--c);
  border-radius: var(--radius);
  background: var(--panel);
}

.check header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

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

.badge {
  padding: 1px 9px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--c) 16%, transparent);
  color: var(--c);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.check p {
  margin: 8px 0 0;
}

.details {
  margin: 8px 0 0;
  padding-left: 20px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 13px;
  overflow-wrap: anywhere;
}

.fix {
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--panel-2);
}

.more {
  margin-top: 10px;
}

.more summary {
  color: var(--accent);
  font-size: 14px;
  cursor: pointer;
}

.more p,
.more ul {
  color: #c3cadb;
  font-size: 15px;
}

.more ul {
  margin: 8px 0 0;
  padding-left: 20px;
}

.verify {
  overflow-wrap: anywhere;
}

/* ---------- terminal, explanations ---------- */

.cli,
.how {
  margin-top: 28px;
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.cli h3,
.how h2 {
  margin: 0 0 12px;
  font-size: 18px;
}

.cli pre {
  margin: 0;
  padding: 14px 16px;
  overflow-x: auto;
  border-radius: 10px;
  background: #02040a;
  color: var(--accent);
}

.cli p {
  margin: 12px 0 0;
  color: var(--muted);
}

.how {
  margin-bottom: 48px;
}

.how ul {
  margin: 0;
  padding-left: 20px;
}

.how li + li {
  margin-top: 8px;
}

.note {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 14px;
}

/* ---------- small screens ---------- */

@media (max-width: 600px) {
  .top nav a:first-child {
    display: none;
  }

  .intro {
    padding-top: 28px;
  }

  .form {
    flex-direction: column;
  }

  .form button {
    padding: 13px;
  }

  .summary {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    padding: 20px;
  }

  .score {
    width: 104px;
    height: 104px;
  }

  .check,
  .cli,
  .how {
    padding: 16px;
  }

  .cli pre {
    white-space: pre-wrap;
    overflow-wrap: anywhere;
  }
}

@media (prefers-reduced-motion: reduce) {
  .ring {
    transition: none;
  }

  .steps li.is-active::before {
    animation: none;
  }
}