:root {
  --bg: #f7f8fa;
  --panel: #ffffff;
  --ink: #16181d;
  --dim: #6b7280;
  --line: #e5e7eb;
  --brand: #0f766e;
  --brand-ink: #0b3d39;
  --accent: #115e59;
  --ok: #15803d;
  --warn: #b45309;
  --err: #b91c1c;
  --info: #1d4ed8;
  --radius: 10px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

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

h1 {
  font-size: 1.9rem;
  line-height: 1.25;
  margin: 0 0 0.5rem;
}

h2 {
  font-size: 1.4rem;
  margin: 0 0 0.75rem;
}

h3 {
  font-size: 1.05rem;
  margin: 0 0 0.5rem;
}

.mono {
  font-family: var(--mono);
}

.dim {
  color: var(--dim);
}

.small {
  font-size: 0.875rem;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1040px;
  margin: 0 auto;
  padding: 1rem 1.25rem;
}

.nav .brand {
  font-weight: 700;
  font-size: 1.15rem;
  text-decoration: none;
  color: var(--ink);
}

.nav .brand span {
  color: var(--brand);
}

.nav nav a {
  margin-left: 1.25rem;
  text-decoration: none;
  color: var(--dim);
}

.nav nav a:hover {
  color: var(--ink);
}

main {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 1.25rem 3rem;
}

.section {
  margin: 3rem 0;
}

.section.narrow {
  max-width: 720px;
}

.hero {
  padding: 3rem 0 1rem;
  text-align: center;
}

.hero .lead {
  max-width: 640px;
  margin: 0 auto 1.5rem;
  color: var(--dim);
  font-size: 1.1rem;
}

.check {
  display: flex;
  gap: 0.5rem;
  max-width: 560px;
  margin: 0 auto;
  padding: 0.5rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.check input {
  flex: 1;
  border: 0;
  outline: none;
  font-size: 1rem;
  padding: 0.5rem 0.75rem;
  background: transparent;
}

input,
select,
textarea {
  font: inherit;
  color: inherit;
}

button,
.button {
  background: var(--brand);
  color: #fff;
  border: 0;
  border-radius: 8px;
  padding: 0.6rem 1.1rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

button:hover,
.button:hover {
  background: var(--brand-ink);
}

button.secondary {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--line);
}

button.danger {
  background: var(--err);
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin: 1rem 0;
}

.panel.result {
  text-align: left;
}

.form {
  display: grid;
  gap: 0.35rem;
  max-width: 560px;
}

.form label {
  font-size: 0.875rem;
  color: var(--dim);
  margin-top: 0.5rem;
}

.form input,
.form select {
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.form button {
  margin-top: 0.9rem;
  justify-self: start;
}

.grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.1rem;
}

.card p {
  margin: 0.4rem 0 0;
  color: var(--dim);
  font-size: 0.95rem;
}

.plans .plan {
  text-align: center;
}

.plans .plan.featured {
  border-color: var(--brand);
  box-shadow: 0 0 0 1px var(--brand);
}

.plans .price {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--ink);
  margin: 0.25rem 0 0.75rem;
}

.plans ul {
  list-style: none;
  padding: 0;
  margin: 0 0 0.75rem;
  color: var(--dim);
  font-size: 0.95rem;
}

.plans li {
  margin: 0.25rem 0;
}

.badge {
  display: inline-block;
  border-radius: 999px;
  padding: 0.1rem 0.6rem;
  font-size: 0.8rem;
  font-weight: 600;
}

.badge.ok {
  background: #dcfce7;
  color: var(--ok);
}

.badge.warn {
  background: #fef3c7;
  color: var(--warn);
}

.badge.err {
  background: #fee2e2;
  color: var(--err);
}

.badge.info {
  background: #dbeafe;
  color: var(--info);
}

table.kv {
  width: 100%;
  border-collapse: collapse;
}

table.kv th,
table.kv td {
  text-align: left;
  padding: 0.45rem 0.5rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

table.kv th {
  width: 220px;
  color: var(--dim);
  font-weight: 500;
}

table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

table.data th,
table.data td {
  text-align: left;
  padding: 0.4rem 0.5rem;
  border-bottom: 1px solid var(--line);
}

.notice {
  border-left: 3px solid var(--warn);
  background: #fffbeb;
  padding: 0.6rem 0.8rem;
  border-radius: 6px;
  color: var(--warn);
  font-size: 0.9rem;
}

.notice.err {
  border-color: var(--err);
  background: #fef2f2;
  color: var(--err);
}

.notice.ok {
  border-color: var(--ok);
  background: #f0fdf4;
  color: var(--ok);
}

.token-box {
  font-family: var(--mono);
  background: #0f172a;
  color: #e2e8f0;
  border-radius: 8px;
  padding: 0.75rem;
  word-break: break-all;
  margin: 0.5rem 0;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.prose {
  max-width: 720px;
}

.prose h2 {
  margin-top: 1.75rem;
}

.prose ul {
  padding-left: 1.25rem;
}

.footer {
  max-width: 1040px;
  margin: 2rem auto 0;
  padding: 1.5rem 1.25rem 2rem;
  border-top: 1px solid var(--line);
  color: var(--dim);
  font-size: 0.875rem;
}

.footer p {
  margin: 0.25rem 0;
}

details {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  margin: 0.5rem 0;
}

details summary {
  cursor: pointer;
  font-weight: 600;
}

details p {
  color: var(--dim);
  margin: 0.6rem 0 0;
}

@media (max-width: 600px) {
  table.kv th {
    width: 130px;
  }

  .check {
    flex-direction: column;
  }

  .check button {
    width: 100%;
  }
}