:root {
  --bg: #0f1115;
  --card: #171a21;
  --fg: #e7e9ee;
  --muted: #9aa3b2;
  --accent: #5b8cff;
  --line: #262b36;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
}

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 4rem 1.5rem 3rem;
}

header { margin-bottom: 2.5rem; }

.badge {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.2rem 0.7rem;
  margin-bottom: 1rem;
}

h1 {
  font-size: 2.6rem;
  margin: 0 0 0.5rem;
  letter-spacing: -0.02em;
}

.tagline {
  color: var(--muted);
  font-size: 1.1rem;
  margin: 0;
}

section {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.25rem;
}

h2 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin: 0 0 0.75rem;
}

ol.flow, ul.principles { margin: 0; padding-left: 1.2rem; }
ol.flow li, ul.principles li { margin-bottom: 0.35rem; }

footer {
  color: var(--muted);
  font-size: 0.9rem;
  text-align: center;
  margin-top: 2rem;
}

/* --- app chrome (added in step 2) --- */
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.signin { float: right; font-size: 0.9rem; }

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--line);
  background: var(--card);
}
.nav .brand { font-weight: 600; color: var(--fg); }
.nav .navlinks a { margin-left: 1.25rem; color: var(--muted); }
.nav .navlinks a:hover { color: var(--fg); }

.wrap.narrow { max-width: 420px; }

form.stack { display: flex; flex-direction: column; gap: 0.9rem; }
form.stack label { display: flex; flex-direction: column; gap: 0.35rem; font-size: 0.9rem; color: var(--muted); }

input, textarea {
  background: #0c0e13;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--fg);
  padding: 0.6rem 0.7rem;
  font: inherit;
  width: 100%;
}
input:focus, textarea:focus { outline: none; border-color: var(--accent); }

button {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 0.6rem 1.1rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  align-self: flex-start;
}
button:hover { filter: brightness(1.08); }

.error { color: #ff6b6b; }
.ok { color: #4ade80; }
.muted { color: var(--muted); }