:root {
  color-scheme: light;
  --ink: #1c1915;
  --muted: #6b645c;
  --line: #ddd4c8;
  --paper: #f6f1e8;
  --card: #fffdf8;
  --accent: #9a3412;
  --accent-press: #7c2d12;
  --ok: #3f6212;
  --bad: #9f1239;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  display: grid;
  place-items: center;
  padding: 32px 16px;
  background:
    radial-gradient(circle at top, #fff8ee, transparent 45%),
    var(--paper);
  color: var(--ink);
  font: 16px/1.5 "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", sans-serif;
}

.card {
  width: min(560px, 100%);
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--card);
  box-shadow: 0 18px 40px rgba(60, 40, 16, 0.08);
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--accent);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 8px;
  font-size: 28px;
  font-weight: 650;
  letter-spacing: -0.03em;
}

.lead,
.status {
  color: var(--muted);
}

.lead {
  margin: 0 0 28px;
}

form {
  display: grid;
  gap: 16px;
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 13px;
}

input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  color: var(--ink);
  font: inherit;
}

input:focus {
  outline: 2px solid rgba(154, 52, 18, 0.28);
  border-color: var(--accent);
}

.range {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

button {
  margin-top: 8px;
  padding: 12px 16px;
  border: 0;
  border-radius: 12px;
  background: var(--accent);
  color: #fff8f1;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

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

button:disabled {
  cursor: wait;
  opacity: 0.7;
}

.status {
  margin-top: 20px;
  padding: 14px 16px;
  border-radius: 12px;
  background: #f3eee4;
}

.status.ok {
  color: var(--ok);
}

.status.bad {
  color: var(--bad);
}

.status a {
  color: inherit;
  font-weight: 600;
}

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

.status p:last-child {
  margin-bottom: 0;
}

@media (max-width: 640px) {
  .card {
    padding: 24px 18px;
  }

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