:root {
  --bg: #0f1218;
  --surface: #181c26;
  --border: #2a3142;
  --text: #e8eaef;
  --muted: #8b93a7;
  --accent: #5b8cff;
  --accent-hover: #7aa3ff;
  --radius: 12px;
  font-family: "SF Pro Text", "Segoe UI", system-ui, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  display: flex;
  flex-direction: column;
}

.app {
  flex: 1;
  max-width: 640px;
  margin: 0 auto;
  padding: 2rem 1.25rem;
  width: 100%;
}

.header {
  margin-bottom: 1.75rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.logo {
  color: var(--accent);
  font-size: 1.5rem;
}

.header h1 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.tagline {
  margin: 0.5rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.tagline code,
.panel code,
.steps code {
  font-size: 0.88em;
  padding: 0.12em 0.4em;
  border-radius: 4px;
  background: var(--bg);
  color: var(--accent-hover);
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.35rem;
  margin-bottom: 1rem;
}

.panel h2 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  font-weight: 600;
}

.muted-panel {
  border-style: dashed;
}

.muted-panel p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--muted);
}

.steps {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
  color: var(--text);
  font-size: 0.9rem;
}

.steps li {
  margin-bottom: 0.5rem;
}

.actions {
  margin: 0;
}

.btn {
  display: inline-block;
  font: inherit;
  cursor: pointer;
  border-radius: 8px;
  padding: 0.55rem 1.1rem;
  border: 1px solid transparent;
  text-decoration: none;
  transition: background 0.15s;
}

.btn.primary {
  background: var(--accent);
  color: #fff;
}

.btn.primary:hover {
  background: var(--accent-hover);
}

.site-footer {
  margin-top: auto;
  padding: 1.25rem 1rem 1.75rem;
  text-align: center;
  border-top: 1px solid var(--border);
  background: rgba(15, 18, 24, 0.85);
}

.site-footer p {
  margin: 0;
  font-size: 0.8125rem;
}

.site-footer a {
  color: var(--muted);
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--accent);
  text-decoration: underline;
}