:root {
  color-scheme: dark;
  --bg: #0e1220;
  --panel: #171d31;
  --panel-strong: #202844;
  --text: #f3f6ff;
  --muted: #b7c0da;
  --border: #2e3a63;
  --accent: #8aa8ff;
  --accent-strong: #4f7cff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top, #1d2744, var(--bg) 48%);
  color: var(--text);
}

a {
  color: var(--accent);
  text-decoration: none;
}

code,
pre,
input {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

.shell {
  width: min(960px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 24px 0 40px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.topbar nav {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.notice,
.hero,
.card {
  border: 1px solid var(--border);
  background: rgba(23, 29, 49, 0.92);
  border-radius: 18px;
  padding: 20px;
  margin-bottom: 18px;
}

.notice {
  background: rgba(33, 40, 68, 0.92);
  color: var(--muted);
}

.eyebrow {
  margin: 0 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  font-size: 12px;
}

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

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

label {
  font-weight: 600;
}

input {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--panel-strong);
  color: var(--text);
}

button {
  border: 0;
  border-radius: 12px;
  padding: 12px 16px;
  font: inherit;
  font-weight: 700;
  background: linear-gradient(180deg, var(--accent), var(--accent-strong));
  color: #081122;
  cursor: pointer;
}

button:hover {
  filter: brightness(1.05);
}

.actions-row {
  margin-top: 16px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btnlink {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 12px 16px;
  border-radius: 12px;
  background: linear-gradient(180deg, var(--accent), var(--accent-strong));
  color: #081122;
  font-weight: 700;
}

.btnlink--secondary {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}

.copy-block {
  margin-top: 14px;
  padding: 14px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(32, 40, 68, 0.55);
  color: var(--muted);
}

.copy-block strong {
  display: block;
  color: var(--text);
  margin-bottom: 8px;
}

.result {
  margin: 12px 0 0;
  padding: 14px;
  border-radius: 14px;
  background: #0b1020;
  border: 1px solid var(--border);
  color: #cdd8ff;
  overflow-x: auto;
  white-space: pre-wrap;
}

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

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

@media (max-width: 720px) {
  .topbar {
    flex-direction: column;
    align-items: flex-start;
  }
}