:root {
  --bg: #0f172a;
  --card: #1e293b;
  --fg: #e2e8f0;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --err: #f87171;
  --border: #334155;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  padding: 1rem;
}

.card {
  width: 100%;
  max-width: 360px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

h1 {
  margin: 0 0 1.25rem;
  font-size: 1.5rem;
}

label {
  display: block;
  margin-bottom: 1rem;
  font-size: 0.9rem;
  color: var(--muted);
}

input {
  width: 100%;
  margin-top: 0.35rem;
  padding: 0.6rem 0.7rem;
  background: #0b1220;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--fg);
  font-size: 1rem;
}

input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

button {
  width: 100%;
  padding: 0.65rem;
  margin-top: 0.5rem;
  background: var(--accent);
  color: #06232f;
  font-weight: 600;
  font-size: 1rem;
  border: 0;
  border-radius: 8px;
  cursor: pointer;
}

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

.msg {
  padding: 0.6rem 0.75rem;
  border-radius: 8px;
  background: #0b1220;
  border: 1px solid var(--border);
  font-size: 0.9rem;
}

.msg.err {
  color: var(--err);
  border-color: var(--err);
}

p { line-height: 1.5; }