:root {
  color-scheme: dark;
  --bg: #15110b;
  --panel: #211a10;
  --line: #6c5a33;
  --gold: #d6b36a;
  --gold-soft: #f1dfaa;
  --ink: #f6efda;
  --muted: #a99a72;
  --error: #e28b61;
  --ok: #9ecb89;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: inherit;
}

.shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px 14px;
}

.panel {
  width: min(560px, 100%);
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 22px;
  border-radius: 8px;
}

.header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  margin: 0 0 6px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 800;
  font-family: "SimSun", "Songti SC", "Noto Serif SC", serif;
}

h1 {
  margin: 0;
  font-size: 28px;
  line-height: 1.2;
  color: var(--gold-soft);
  font-family: "SimSun", "Songti SC", "Noto Serif SC", serif;
  font-weight: 900;
}

.tag {
  flex: 0 0 auto;
  border: 1px solid var(--line);
  color: var(--gold);
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 800;
}

.license-form {
  margin-top: 24px;
}

label {
  display: block;
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.input-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 96px;
  gap: 10px;
}

input,
button {
  height: 46px;
  border-radius: 6px;
  font-size: 16px;
}

input {
  width: 100%;
  border: 1px solid var(--line);
  background: #0d0a07;
  color: #fff;
  padding: 0 12px;
  letter-spacing: .03em;
}

button {
  border: 0;
  background: var(--gold);
  color: #1a1208;
  font-weight: 900;
  cursor: pointer;
  font-family: "SimSun", "Songti SC", "Noto Serif SC", serif;
}

button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--gold-soft);
  outline-offset: 2px;
}

.status {
  min-height: 24px;
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.5;
}

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

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

.install-area {
  margin-top: 18px;
}

.divider {
  height: 1px;
  background: var(--line);
  margin-bottom: 18px;
}

.install-button {
  width: 100%;
}

.unsupported,
.hint {
  display: block;
  color: var(--muted);
  line-height: 1.55;
  margin-top: 10px;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 18px;
}

.info-grid div,
.release-box {
  border: 1px solid rgba(108, 90, 51, .7);
  border-radius: 6px;
  padding: 12px;
  background: rgba(13, 10, 7, .45);
}

.info-grid strong,
.release-box h2 {
  display: block;
  margin: 0 0 8px;
  color: var(--gold-soft);
  font-size: 15px;
}

.info-grid p {
  margin: 0;
  color: var(--muted);
  line-height: 1.45;
}

.release-box {
  margin-top: 14px;
}

.release-box ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.65;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: 22px;
}

.steps div {
  border: 1px solid rgba(108, 90, 51, .7);
  border-radius: 6px;
  padding: 10px;
  color: var(--muted);
  font-size: 13px;
}

.steps span {
  display: inline-grid;
  place-items: center;
  width: 20px;
  height: 20px;
  margin-right: 6px;
  border-radius: 50%;
  background: var(--gold);
  color: #1a1208;
  font-weight: 900;
}

@media (max-width: 440px) {
  .panel {
    padding: 18px;
  }

  h1 {
    font-size: 23px;
  }

  .input-row,
  .steps,
  .info-grid {
    grid-template-columns: 1fr;
  }
}