:root {
  --bg: #0f1218;
  --fg: #e8eaef;
  --muted: #9aa3b2;
  --accent: #3ecf8e;
  --card: #171b24;
  --border: #2a3140;
  --err: #f56565;
}
* { box-sizing: border-box; }
body.app {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.5;
}
main.box {
  max-width: 28rem;
  margin: 4rem auto;
  padding: 2rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
}
h1 { font-size: 1.25rem; font-weight: 600; margin: 0 0 1rem; }
p { color: var(--muted); font-size: 0.95rem; margin: 0 0 1rem; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
label { display: block; font-size: 0.875rem; color: var(--muted); margin-bottom: 0.35rem; }
input[type="email"] {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #0b0e14;
  color: var(--fg);
  font-size: 1rem;
}
input[type="email"]:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
button, .button {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.6rem 1.1rem;
  border: none;
  border-radius: 8px;
  background: #238636;
  color: #fff;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
}
button:hover, .button:hover { filter: brightness(1.05); }
.alert { color: var(--err); font-size: 0.9rem; margin: 0 0 0.5rem; }
.notice { color: var(--accent); font-size: 0.9rem; }
.nav { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1.25rem; }
.msg { color: var(--muted); }