:root {
  color-scheme: light dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
  --canvas: oklch(0.975 0.01 158);
  --surface: oklch(0.995 0.006 158);
  --surface-subtle: oklch(0.95 0.014 158);
  --text: oklch(0.22 0.025 158);
  --muted: oklch(0.49 0.028 158);
  --border: oklch(0.86 0.02 158);
  --accent: oklch(0.58 0.15 153);
  --accent-hover: oklch(0.52 0.15 153);
  --accent-ink: oklch(0.99 0.005 158);
  --success: oklch(0.55 0.15 153);
  --success-bg: oklch(0.94 0.045 153);
  --warning: oklch(0.57 0.13 78);
  --warning-bg: oklch(0.95 0.04 78);
  --danger: oklch(0.56 0.18 24);
  --danger-bg: oklch(0.95 0.04 24);
  background: var(--canvas);
  color: var(--text);
}

@media (prefers-color-scheme: dark) {
  :root {
    --canvas: oklch(0.16 0.018 158);
    --surface: oklch(0.205 0.022 158);
    --surface-subtle: oklch(0.245 0.025 158);
    --text: oklch(0.94 0.012 158);
    --muted: oklch(0.71 0.026 158);
    --border: oklch(0.34 0.03 158);
    --accent: oklch(0.73 0.15 153);
    --accent-hover: oklch(0.79 0.13 153);
    --accent-ink: oklch(0.18 0.025 158);
    --success: oklch(0.74 0.14 153);
    --success-bg: oklch(0.27 0.055 153);
    --warning: oklch(0.79 0.13 78);
    --warning-bg: oklch(0.27 0.05 78);
    --danger: oklch(0.75 0.15 24);
    --danger-bg: oklch(0.27 0.055 24);
  }
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  background: var(--canvas);
}

button,
input {
  font: inherit;
}

.shell {
  width: min(58rem, calc(100% - 2rem));
  margin: 0 auto;
  padding: 4rem 0 2rem;
}

.hero {
  max-width: 46rem;
}

.eyebrow,
.step {
  margin: 0 0 0.65rem;
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  max-width: 42rem;
  margin-bottom: 1rem;
  font-size: 2.75rem;
  line-height: 1.05;
  letter-spacing: -0.045em;
}

.lede {
  max-width: 68ch;
  margin-bottom: 2.25rem;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.65;
}

.panel {
  padding: 2rem;
  border: 1px solid var(--border);
  border-radius: 1rem;
  background: var(--surface);
  box-shadow: 0 1rem 2.5rem oklch(0.12 0.02 158 / 0.09);
}

.panel-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.75rem;
}

h2 {
  margin-bottom: 0;
  font-size: 1.75rem;
  letter-spacing: -0.025em;
}

.state {
  flex: 0 0 auto;
  padding: 0.4rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 750;
}

.state-running {
  border-color: var(--warning);
  background: var(--warning-bg);
  color: var(--warning);
}

.state-success {
  border-color: var(--success);
  background: var(--success-bg);
  color: var(--success);
}

.state-error {
  border-color: var(--danger);
  background: var(--danger-bg);
  color: var(--danger);
}

label {
  display: block;
  margin: 0.85rem 0 0.5rem;
  font-size: 0.88rem;
  font-weight: 700;
}

label:first-child {
  margin-top: 0;
}

.form-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.75rem;
}

input {
  min-width: 0;
  padding: 0.85rem 0.95rem;
  border: 1px solid var(--border);
  border-radius: 0.65rem;
  outline: none;
  background: var(--surface-subtle);
  color: var(--text);
}

input:focus-visible {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px oklch(0.65 0.14 153 / 0.2);
}

button {
  padding: 0.85rem 1.15rem;
  border: 1px solid var(--accent);
  border-radius: 0.65rem;
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 800;
  cursor: pointer;
}

button:hover {
  border-color: var(--accent-hover);
  background: var(--accent-hover);
}

button:focus-visible {
  outline: 3px solid oklch(0.65 0.14 153 / 0.3);
  outline-offset: 2px;
}

button:disabled {
  cursor: wait;
  opacity: 0.65;
}

.hint {
  margin: 0.65rem 0 0;
  color: var(--muted);
  font-size: 0.82rem;
}

.checks {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.check {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  min-width: 0;
  padding: 0.9rem;
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  background: var(--surface-subtle);
}

.check-dot {
  width: 0.65rem;
  height: 0.65rem;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--muted);
  box-shadow: 0 0 0 4px oklch(0.55 0.03 158 / 0.12);
}

.check p {
  margin-bottom: 0.18rem;
  color: var(--muted);
  font-size: 0.75rem;
}

.check strong {
  display: block;
  overflow: hidden;
  font-size: 0.88rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.check-success {
  border-color: var(--success);
  background: var(--success-bg);
}

.check-success .check-dot {
  background: var(--success);
  box-shadow: 0 0 0 4px oklch(0.68 0.14 153 / 0.14);
}

.check-error {
  border-color: var(--danger);
  background: var(--danger-bg);
}

.check-error .check-dot {
  background: var(--danger);
  box-shadow: 0 0 0 4px oklch(0.65 0.16 24 / 0.14);
}

.result {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1rem;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  background: var(--surface-subtle);
}

.result span {
  display: block;
  margin-bottom: 0.3rem;
  color: var(--muted);
  font-size: 0.72rem;
  text-transform: uppercase;
}

code {
  overflow-wrap: anywhere;
  color: var(--success);
}

.error {
  margin: 1rem 0 0;
  padding: 0.8rem 0.95rem;
  border: 1px solid var(--danger);
  border-radius: 0.65rem;
  background: var(--danger-bg);
  color: var(--danger);
}

footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 1.5rem 0 0;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.76rem;
}

@media (max-width: 700px) {
  .shell {
    width: min(100% - 1rem, 58rem);
    padding-top: 2rem;
  }

  h1 {
    font-size: 2.15rem;
  }

  .panel {
    padding: 1.25rem;
  }

  .form-row,
  .checks,
  .result {
    grid-template-columns: 1fr;
  }

  .panel-heading {
    flex-direction: column;
  }

  button {
    width: 100%;
  }
}

@media (prefers-reduced-motion: no-preference) {
  button,
  input,
  .check,
  .state {
    transition: color 180ms cubic-bezier(0.16, 1, 0.3, 1),
      background-color 180ms cubic-bezier(0.16, 1, 0.3, 1),
      border-color 180ms cubic-bezier(0.16, 1, 0.3, 1),
      box-shadow 180ms cubic-bezier(0.16, 1, 0.3, 1);
  }
}