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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #0f172a;
  color: #e2e8f0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-card {
  background: #1e293b;
  border-radius: 16px;
  padding: 2.5rem 2rem;
  width: 100%;
  max-width: 380px;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.4);
}

.login-header {
  text-align: center;
  margin-bottom: 2rem;
}

.login-logo {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.login-header h1 {
  font-size: 1.4rem;
  font-weight: 600;
  color: #f1f5f9;
}

.login-header p {
  font-size: 0.85rem;
  color: #64748b;
  margin-top: 0.25rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  color: #94a3b8;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.4rem;
}

input {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  background: #0f172a;
  border: 2px solid #334155;
  border-radius: 8px;
  color: #f1f5f9;
  transition: border-color 0.2s;
}

input:focus {
  outline: none;
  border-color: #3b82f6;
}

input::placeholder {
  color: #475569;
}

.login-btn {
  width: 100%;
  padding: 0.85rem;
  font-size: 1rem;
  font-weight: 600;
  background: #3b82f6;
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s;
  margin-top: 0.5rem;
}

.login-btn:hover { background: #2563eb; }
.login-btn:active { background: #1d4ed8; }
.login-btn:disabled { background: #475569; cursor: not-allowed; }

.error-msg {
  background: #450a0a;
  border: 1px solid #7f1d1d;
  color: #fca5a5;
  padding: 0.65rem 1rem;
  border-radius: 8px;
  font-size: 0.85rem;
  margin-bottom: 1.25rem;
  display: none;
}

.error-msg.visible { display: block; }

@media (max-width: 440px) {
  .login-card {
    margin: 1rem;
    padding: 2rem 1.5rem;
  }
}