:root {
  --bg: #0a0a0a;
  --surface: #141414;
  --border: #2a2a2a;
  --text: #e5e5e5;
  --muted: #a3a3a3;
  --accent: #3dd68c;
  --error: #f87171;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: radial-gradient(1200px 600px at 50% -10%, #1a2e1a 0%, var(--bg) 55%);
  color: var(--text);
}

.card {
  width: 100%;
  max-width: 420px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px 28px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 24px;
}

.logo {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: linear-gradient(135deg, #38bdf8 0%, #2563eb 100%);
  color: #fff;
  font-weight: 700;
  font-size: 1.25rem;
  display: grid;
  place-items: center;
}

.brand h1 {
  margin: 0;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}

.tagline {
  margin: 4px 0 0;
  font-size: 0.78rem;
  color: var(--muted);
}

h2 {
  margin: 0 0 8px;
  font-size: 1.1rem;
}

.lead {
  margin: 0 0 20px;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.5;
}

label {
  display: block;
  margin: 0 0 6px;
  font-size: 0.85rem;
  color: var(--muted);
}

input {
  width: 100%;
  margin-bottom: 14px;
  padding: 11px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #0f0f0f;
  color: var(--text);
  font-size: 1rem;
}

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

button {
  width: 100%;
  margin-top: 6px;
  padding: 12px 16px;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: #0a0a0a;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
}

button:disabled {
  opacity: 0.6;
  cursor: wait;
}

.error {
  margin: 0 0 8px;
  color: var(--error);
  font-size: 0.85rem;
}