body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #0f172a;
  color: #e2e8f0;
}

.page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  box-sizing: border-box;
}

.card {
  width: 100%;
  max-width: 420px;
  background: #1e293b;
  border-radius: 16px;
  padding: 24px;
  box-sizing: border-box;
  box-shadow: 0 10px 30px rgba(0,0,0,0.35);
}

h1 {
  margin-top: 0;
  margin-bottom: 8px;
  font-size: 28px;
}

.subtitle {
  margin-top: 0;
  margin-bottom: 20px;
  color: #94a3b8;
}

input {
  width: 100%;
  padding: 14px;
  font-size: 16px;
  border-radius: 10px;
  border: 1px solid #475569;
  background: #0f172a;
  color: #e2e8f0;
  box-sizing: border-box;
  margin-bottom: 14px;
}

button {
  width: 100%;
  padding: 14px;
  font-size: 16px;
  font-weight: bold;
  border: none;
  border-radius: 10px;
  background: #38bdf8;
  color: #0f172a;
  cursor: pointer;
}

button:hover {
  opacity: 0.95;
}

.error {
  color: #f87171;
  min-height: 20px;
  margin-top: 14px;
}

.success {
  color: #4ade80;
  font-weight: bold;
}

.hidden {
  display: none;
}