:root {
  --bg: #0f172a;
  --card: rgba(255,255,255,0.08);
  --accent: #38bdf8;
  --text: #e5e7eb;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: linear-gradient(135deg, #020617, #0f172a);
  font-family: system-ui, sans-serif;
  color: var(--text);
}

.login-box {
  background: var(--card);
  padding: 40px;
  width: 90%;
  max-width: 350px;
  border-radius: 20px;
  backdrop-filter: blur(15px);
  box-shadow: 0 0 40px rgba(56,189,248,0.25);
  text-align: center;
}

.login-box h2 {
  margin-bottom: 25px;
  color: var(--accent);
}

.input-group {
  margin-bottom: 20px;
}

input {
  width: 100%;
  padding: 12px 15px;
  border-radius: 10px;
  border: none;
  outline: none;
  background: rgba(255,255,255,0.1);
  color: white;
}

input::placeholder {
  color: #94a3b8;
}

button {
  width: 100%;
  padding: 12px;
  border-radius: 10px;
  border: none;
  background: var(--accent);
  color: #020617;
  font-weight: bold;
  cursor: pointer;
  transition: 0.3s;
}

button:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(56,189,248,0.5);
}
#error-message {
  margin-top: 15px;
  color: #f87171;
  font-size: 0.9rem;
}
.clue {
  font-size: 0.85rem;
  color: #94a3b8;
  margin-bottom: 20px;
  opacity: 0.8;
}