:root {
  --bg: #0f1c24;
  --card: #17303a;
  --accent: #2aa7a0;
  --text: #e8f1f0;
  --muted: #9bb0b4;
  --danger: #ff7a6e;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", system-ui, sans-serif;
  background: linear-gradient(145deg, #0f1c24, #17303a 60%, #1a3d4a);
  color: var(--text);
  min-height: 100vh;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 32px 20px 64px; }
h1 { margin: 0 0 8px; font-size: 2rem; }
.muted { color: var(--muted); }
.nav { display: grid; gap: 10px; margin-top: 28px; }
.nav a, button, .btn {
  display: block;
  text-align: center;
  text-decoration: none;
  color: var(--text);
  background: rgba(42, 167, 160, 0.2);
  border: 1px solid rgba(42, 167, 160, 0.45);
  border-radius: 12px;
  padding: 14px 16px;
  cursor: pointer;
  font-size: 1rem;
}
input, select {
  width: 100%;
  padding: 12px;
  margin: 8px 0 14px;
  border-radius: 10px;
  border: 1px solid #345;
  background: #0c171d;
  color: var(--text);
}
.card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 16px;
  padding: 16px;
  margin: 12px 0;
}
.err { color: var(--danger); white-space: pre-wrap; }
.ok { color: #8ef0c0; }
label { font-size: 0.9rem; color: var(--muted); }